WO1999044236A1 - Method of manufacturing three-dimensional device - Google Patents
Method of manufacturing three-dimensional device Download PDFInfo
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- WO1999044236A1 WO1999044236A1 PCT/JP1999/000819 JP9900819W WO9944236A1 WO 1999044236 A1 WO1999044236 A1 WO 1999044236A1 JP 9900819 W JP9900819 W JP 9900819W WO 9944236 A1 WO9944236 A1 WO 9944236A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/06—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0688—Integrated circuits having a three-dimensional layout
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68359—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used as a support during manufacture of interconnect decals or build up layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68368—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used in a transfer process involving at least two transfer steps, i.e. including an intermediate handle substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12044—OLED
Definitions
- a three-dimensional device such as a three-dimensional IC
- a first layer including a field effect transistor (FET) and the like is formed on a Si substrate through many steps.
- FET field effect transistor
- a similar second layer is formed on the first layer.
- the third and subsequent layers are formed.
- each layer is formed on the same substrate so as to be sequentially stacked, so that the formation of the upper layer must not adversely affect the lower layer.
- constraints eg, upper temperature limit that does not alter the lower layer.
- each layer when different layers are stacked, it is extremely difficult to form each layer with appropriate device parameters (eg, gate line width, gate insulating film thickness, design rules, manufacturing conditions such as manufacturing temperature). Difficult.
- device parameters eg, gate line width, gate insulating film thickness, design rules, manufacturing conditions such as manufacturing temperature. Difficult.
- the substrate to be used is compatible with the substrate of the device and the substrate when forming each layer. Therefore, it was disadvantageous that only a specific substrate could be used.
- An object of the present invention is to provide a method for manufacturing a three-dimensional device, which allows a high-performance three-dimensional device to be easily manufactured by increasing the degree of freedom in forming conditions of a thin film device layer. Disclosure of the invention
- a method for manufacturing a three-dimensional device by manufacturing a three-dimensional device by laminating a plurality of thin-film device layers arranged in a predetermined region in a two-dimensional direction in a thickness direction thereof, the method comprising: A method for manufacturing a three-dimensional device, comprising laminating at least one of the above by a transfer method.
- a method for manufacturing a three-dimensional device comprising:
- the transfer method includes, after forming a thin film device layer on a first substrate via a separation layer, irradiating the separation layer with irradiation light, and peeling off the inside and / or the interface of the separation layer.
- connection electrode is formed on the thin film device layer, and the connection electrode electrically connects the adjacent thin film device layers. Manufacturing method.
- connection electrodes are present on both surfaces of the thin film device layer.
- a light emitting portion is formed on one layer, and a light receiving portion for receiving light from the light emitting portion is formed on the other layer.
- the thin film device layer to be transferred and laminated is the three-dimensional device according to any one of (1) to (14), which is manufactured simultaneously with at least one of the other thin film device layers. Production method.
- FIG. 1 is a cross-sectional view schematically showing the steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 2 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 3 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 4 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 5 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 6 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 7 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 8 is a cross-sectional view schematically showing steps of an embodiment of the method for transferring a thin film structure according to the present invention.
- FIG. 9 is a cross-sectional view schematically illustrating a configuration example of a three-dimensional device according to the present invention.
- FIG. 10 is a sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 11 is a sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 12 is a sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 13 is a sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 14 is a cross-sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 15 is a sectional view schematically showing the steps of the first embodiment of the method for producing a three-dimensional device of the present invention.
- FIG. 16 is a cross-sectional view schematically illustrating another configuration example of the three-dimensional device according to the present invention.
- FIG. 17 is a cross-sectional view schematically illustrating another configuration example of the three-dimensional device according to the present invention.
- FIG. 18 is a cross-sectional view schematically illustrating another configuration example of the three-dimensional device according to the present invention.
- FIG. 19 is a cross-sectional view showing a configuration example of the organic EL device according to the present invention.
- FIG. 20 is a cross-sectional view showing a configuration example of a PIN photodiode in the present invention. Explanation of reference numerals
- a three-dimensional device for example, a three-dimensional IC
- a three-dimensional IC is manufactured by laminating a plurality of layers using a “transfer method (transfer technique) of a thin film structure” described later.
- transfer method transfer technique
- FIG. 1 to 8 are cross-sectional views schematically illustrating steps of an embodiment of a method for transferring a thin film structure according to the present invention.
- peeling method the steps of the method of transferring a thin film structure (peeling method) will be sequentially described based on these drawings.
- a separation layer (light absorption layer) 2 is formed on one surface of a substrate 1 (a separation layer forming surface 11).
- the substrate 1 When irradiating the irradiation light 7 from the substrate 1 side, the substrate 1 preferably has a light-transmitting property that allows the irradiation light 7 to pass through.
- the transmittance of the irradiation light 7 is preferably at least 10%, more preferably at least 50%. If the transmittance is too low, the attenuation (loss) of the irradiation light 7 increases, and a larger amount of light is required to separate the separation layer 2.
- the substrate 1 is preferably made of a highly reliable material, and particularly preferably made of a material having excellent heat resistance.
- the process temperature may be high (for example, about 350 to 100 ° C.) depending on the type and formation method. Even in this case, if the substrate 1 has excellent heat resistance, the range of setting of film forming conditions such as temperature conditions in forming the transferred layer 4 and the like on the substrate 1 is widened.
- the substrate 1 is preferably made of a material whose strain point is equal to or higher than T max, where T max is the maximum temperature at the time of forming the transferred layer 4.
- the constituent material of the substrate 1 preferably has a strain point of 350 ° C. or more, more preferably 500 ° C. or more. Examples of such a material include heat-resistant glass such as quartz glass, soda glass, Corning 759, and NEC Glass O A-2.
- the substrate 1 may also be made of an inexpensive glass material having a low melting point. Resin can be used.
- the thickness of the substrate 1 is not particularly limited, it is usually preferably about 0.1 to 5.0 mm, more preferably about 0.5 to 1.5. If the thickness of the substrate 1 is too small, the strength is reduced. If the thickness is too large, the irradiation light 7 is likely to be attenuated when the transmittance of the substrate 1 is low. In the case where the transmittance of the irradiation light 7 of the substrate 1 is high, the thickness may exceed the upper limit.
- the thickness of the separation layer forming portion of the substrate 1 is preferably uniform so that the irradiation light 7 can be uniformly irradiated.
- the separation layer forming surface 11 and the irradiation light incidence surface 12 of the substrate 1 are not limited to the flat surface as shown, but may be a curved surface.
- the substrate 1 is not removed by etching or the like, but the separation layer 2 between the substrate 1 and the transfer layer 4 is peeled off to separate the substrate 1, so that the work is easy and For example, there is a wide range of options for the substrate 1 such as using a relatively thick substrate.
- the separation layer 2 absorbs the irradiation light 7 described below, and may cause peeling (hereinafter referred to as “intralayer peeling” or “interfacial peeling”) in the layer and at the Z or interface 2a or 2b.
- the irradiation of the irradiation light 7 causes the bonding force between the atoms or molecules of the substance constituting the separation layer 2 to disappear or decrease, in other words, to cause the abrasion.
- the squeezing leads to delamination in the layer and / or interfacial delamination.
- gas may be released from the separation layer 2 and a separation effect may be exhibited. That is, the case where the component contained in the separation layer 2 is released as a gas and the case where the separation layer 2 absorbs light to become a gas for a moment and the vapor is released and contributes to the separation. is there.
- composition of the separation layer 2 examples include the following. 1 Amorphous silicon (a— S i)
- This amorphous silicon may contain H (hydrogen).
- the H content is preferably about 2 & 1:% or more, and is about 2 to 2 Oat%. Is more preferred.
- hydrogen is released by the irradiation of the irradiation light 7, and an internal pressure is generated in the separation layer 2, which serves as a force for peeling the upper and lower thin films.
- the H content in the amorphous silicon is adjusted by appropriately setting the conditions for film formation, such as gas composition, gas pressure, gas atmosphere, gas flow rate, temperature, substrate temperature, and input power in CVD. be able to.
- oxide ceramics such as silicon oxide or silicate compound, titanium oxide or titanate compound, zirconium oxide or zirconate compound, lanthanum oxide or lanthanic acid compound, dielectric (ferroelectric) or semiconductor
- Kei-containing, S i O, S i 0 2, S i 3 0 2 , and examples of Kei acid compound e.g., K 2 S i 03, L i 2 S i 03, C a S i 0 3 , ZrSio
- the titanium oxide compound for example, B a T i 0 4, B a T i 03, B a 2 T i 9 ⁇ 2 . , B a T i 5 O n , C a T i 03, S r T i 0 3, P b T i 0 3, M g T i 0 3,
- Z r T i 0 2 S nT i 0 4, A 1 2 T i 0 5, F e T i 0 3 and the like.
- Ceramics or dielectrics such as PZT, PLZT, PLLZT, and PBZT
- Nitride ceramics such as silicon nitride, aluminum nitride, and titanium nitride
- organic polymer materials include polyethylene, polypropylene such as polypropylene, polyimide, polyamide, polyester, polymethyl methacrylate (PMMA), polyphenylene sulfide (PPS), and polyphenylene sulfide (PPS).
- examples include ether sulfone (PES) and epoxy resin.
- Examples of the metal include Al, Li, Ti, Mn, In, Sn, and Sm, or an alloy containing at least one of these.
- the thickness of the separation layer 2 varies depending on the purpose of peeling, the composition of the separation layer 2, the layer structure, the forming method, and other conditions. ⁇ 20 ⁇ m, preferably 10 ⁇ II! More preferably about 2 ⁇ m, and 4 ⁇ ! More preferably, it is about 1 ⁇ m.
- the thickness of the separation layer 2 is too small, the uniformity of the film formation may be impaired, causing uneven peeling. If the thickness is too large, good separation properties of the separation layer 2 are ensured. Therefore, the power (light amount) of the irradiation light 7 needs to be increased, and it takes time to remove the separation layer 2 later.
- the thickness of the separation layer 2 is preferably as uniform as possible.
- the method for forming the separation layer 2 is not particularly limited, and is appropriately selected according to various conditions such as a film composition and a film thickness.
- various vapor-phase deposition methods such as CVD (including MO CVD, low pressure CVD, and ECR—CVD), evaporation, molecular beam deposition (MB), sputtering, ion plating, and PVD, and electrical plating , Dipping, electroless plating, etc., Langmuir's Project (LB) method, spin coating, spray coating, roll coating, etc., various printing methods, transfer methods, ink jetting Method, a powder jet method, and the like, and two or more of these methods can be used in combination.
- CVD including MO CVD, low pressure CVD, and ECR—CVD
- MB molecular beam deposition
- sputtering ion plating
- PVD and electrical plating
- Dipping electroless plating
- electroless plating etc.
- LB Langmuir's Project
- composition of the separation layer 2 is amorphous silicon (a-Si)
- a-Si amorphous silicon
- CVD particularly low pressure CVD or plasma CVD.
- the separation layer 2 is composed of a ceramic by a sol-gel method or composed of an organic high molecular material
- the formation of the separation layer 2 may be performed in two or more steps (for example, a layer forming step and a heat treatment step).
- Such a separation layer 2 may be composed of two or more layers. In this case, the composition or properties of the two or more layers may be the same or different.
- an intermediate layer (underlayer) 3 is formed on the separation layer 2.
- This intermediate layer 3 is formed for various formation purposes. For example, a protective layer, an insulating layer, a conductive layer, an irradiation light, which physically or chemically protects a transferred layer 4 described later during manufacturing or use.
- the composition of the intermediate layer 3 is appropriately set according to the purpose of its formation.
- the composition of the intermediate layer 3 formed between the separation layer 2 made of amorphous silicon and the transfer layer 4 made of a thin film transistor (TFT) is in this case, it includes oxidation Kei containing such S i 0 2, in the case of the intermediate layer 3 formed between the transferred layer 4 by the separation layer 2 and the PZT, if example embodiment, P t, a u , W, Ta, Mo, Al, Cr, Ti or alloys based on these.
- the thickness of the intermediate layer 3 is appropriately determined depending on the purpose of forming the intermediate layer 3 and the degree of the function that can be exhibited. ⁇ 5 ⁇ m, preferably 40 ⁇ ! It is more preferably about 1 to 1 m.
- the method for forming the intermediate layer 3 is the same as the method for forming the intermediate layer 3.
- the formation of the intermediate layer 3 may be performed in two or more steps.
- the intermediate layer 3 may be formed of two or more layers having the same or different composition.
- the transfer layer 4 may be formed directly on the separation layer 2 without forming the intermediate layer 3.
- a layer to be transferred (object to be peeled) 4 is formed on the intermediate layer 3.
- the transfer layer 4 is a layer to be transferred to a transfer body 6 described later, and can be formed by the same method as the formation method described for the separation layer 2.
- the formation purpose, type, form, structure, composition, physical or chemical characteristics, etc. of the layer to be transferred 4 are not particularly limited, but in consideration of the purpose and usefulness of the transfer, a thin film, particularly a functional thin film is used. Preferably it is a membrane or a thin film device.
- Functional thin films and thin film devices are used, for example, in thin film transistors (TFTs), thin film diodes, other thin film semiconductor devices, electrodes (eg, transparent electrodes such as ITO and tin oxide films), solar cells and image sensors.
- Recording media such as photoelectric conversion devices, switching devices, memories, piezoelectric devices, micromirrors (piezoelectric thin film ceramics), magnetic recording media, magneto-optical recording media, optical recording media, etc., magnetic recording thin films Heads, coils, inductors, thin films High-permeability materials and their combination, micro magnetic devices, filters, reflective films, dichroic mirrors, optical thin films such as polarizing elements, semiconductor thin films, superconducting thin films (eg, YBCO thin films) ), Magnetic thin film, metal multilayer film, metal ceramic multilayer film, metal semiconductor multilayer Examples include a thin film, a ceramic semiconductor multilayer thin film, and a multilayer thin film of an organic thin film and another substance.
- the application to thin-film devices, micro-magnetic devices, structures of micro three-dimensional structures, factories, micro-mirrors, etc. is particularly useful and preferable.
- the transfer layer 4 may be a single layer or a laminate of a plurality of layers. Furthermore, a predetermined patterning may be performed like the thin film transistor. The formation (lamination) and patterning of the transfer-receiving layer 4 are performed by a predetermined method according to the method. Such a transferred layer 4 is usually formed through a plurality of steps.
- the formation of the transfer layer 4 by the thin film transistor is described in, for example, Japanese Patent Publication No. 2-563030, and the document: H. Ohshima et al: International Symposium Digest of Technical Papers SID 1983 ,, B / W and Color LC Video Display Addressed by Poly Si TFTs ".
- the thickness of the transferred layer 4 is not particularly limited, and is appropriately set according to various conditions such as the purpose of formation, function, composition, and characteristics.
- the layer 4 to be transferred is a thin film transistor
- the total thickness is preferably about 0.5 to 200 m, more preferably about 1.0 to 10 m.
- the preferred total thickness is even wider. Range, for example, 5 ⁇ ⁇ ! About 1000 m.
- the layer 4 to be transferred is not limited to a thin film as described above, and may be a thick film such as a coated film sheet.
- an adhesive layer 5 is formed on the layer to be transferred (object to be peeled) 4, and the transfer body 6 is bonded (joined) via the adhesive layer 5.
- the adhesive constituting the adhesive layer 5 include various types of curing such as a reaction curing adhesive, a thermosetting adhesive, a light curing adhesive such as an ultraviolet curing adhesive, and an anaerobic curing adhesive. Mold adhesive.
- the composition of the adhesive may be, for example, any of epoxy, acrylate, and silicone.
- the formation of the adhesive layer 5 is performed by, for example, a coating method.
- the curable adhesive for example, a curable adhesive is applied on the layer 4 to be transferred, and a transfer body 6 described later is bonded thereon.
- the transferable layer 4 and the transfer body 6 are bonded and fixed by curing the curable adhesive.
- the translucent transfer member 6 is disposed on the uncured adhesive layer 5, and then the curing agent is irradiated with light for curing from the transfer member 6 to cure the adhesive.
- the substrate 1 has a light-transmitting property, it is preferable to cure the adhesive by irradiating curing light from both sides of the substrate 1 and the transfer body 6, which is preferable because the curing is ensured.
- an adhesive layer 5 may be formed on the transfer body 6 side, and the transferred layer 4 may be bonded thereon. Further, an intermediate layer as described above may be provided between the transferred layer 4 and the adhesive layer 5. Further, for example, when the transfer body 6 itself has an adhesive function, the formation of the adhesive layer 5 may be omitted.
- the transfer body 6 is not particularly limited, but includes a substrate (plate material), particularly a transparent substrate. Note that such a substrate may be a flat plate or a curved plate. Further, the transfer body 6 may be inferior to the substrate 1 in properties such as heat resistance and corrosion resistance. The reason is that, in the present invention, the transferred layer 4 is formed on the substrate 1 side, and then the transferred layer 4 is transferred to the transfer body 6, so that the properties required for the transfer body 6, especially the heat resistance, This is because it does not depend on the temperature conditions and the like when forming the transfer layer 4.
- the structure of the transfer body 6 is As the material, those having a glass transition point (Tg) or a softening point of Tmax or less can be used.
- the transfer body 6 can be composed of a material having a glass transition point (T g) or a softening point of preferably 800 ° C. or lower, more preferably 500 ° C. or lower, and still more preferably 320 ° C. or lower. .
- the mechanical properties of the transfer body 6 those having a certain degree of rigidity (strength) are preferable, but those having flexibility and elasticity may be used.
- the constituent material of the transfer body 6 examples include various synthetic resins and various glass materials, and particularly, various synthetic resins and ordinary (low melting point) inexpensive glass materials are preferable.
- the synthetic resin may be either a thermoplastic resin or a thermosetting resin. Examples thereof include polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), and cyclic polyolefins.
- Modified polyolefin polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide, polyamide imide, polycarbonate, poly (4-methylpentene-1), ionomer, acrylyl resin, poly Methyl methacrylate (PMMA), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA) , Ethylene-vinyl alcohol Polyester, polyether, polyetherketone (PEK), such as ethylene copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycyclohexane terephthalate (PCT).
- PMMA poly Methyl methacrylate
- ABS resin acrylonitrile-but
- Polyetheretherketone PEEK
- PES polyetherimide
- PES polyacetal
- POM polyphenylene oxide
- modified polyphenylene oxide polysulfone
- PPS polyphenylene sulfide
- PES polyethersulfone
- poly Arylate aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, other fluororesins, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, Transpoli Isoprene-based, fluororubber, chlorinated Poryechi various thermoplastic Heras Tomah one lens system or the like, an epoxy resin, an 1 Nord resin, urea resin, Mera Min resin, unsaturated polyester, silicone resins, polyurethanes or the like, Alternatively, copolymers, blends, polymer alloys, and the like containing these as main components may be mentioned, and one or more
- the glass material examples include silicate glass (quartz glass), alkali glass silicate, soda lime glass, potassium lime glass, lead (alkali) glass, barium glass, and borosilicate glass.
- silicate glass quartz glass
- alkali glass silicate soda lime glass
- potassium lime glass potassium lime glass
- lead (alkali) glass barium glass
- borosilicate glass examples include silicate glass (quartz glass), alkali glass silicate, soda lime glass, potassium lime glass, lead (alkali) glass, barium glass, and borosilicate glass.
- silicate glass soda lime glass
- potassium lime glass soda lime glass
- lead (alkali) glass soda lime glass
- barium glass barium glass
- borosilicate glass borosilicate glass.
- those other than silicate glass are preferable because they have a lower melting point than silicate glass, are relatively easy to mold and process, and are inexpensive.
- the large transfer member 6 can be integrally molded, and even if the transfer member 6 has a complicated shape such as one having a curved surface or irregularities, it can be easily formed.
- various advantages such as low material cost and low production cost can be enjoyed. Therefore, large and inexpensive devices (for example, liquid crystal displays) can be easily manufactured.
- the transfer body 6 is, for example, a device constituting an independent device such as a liquid crystal cell, or a part of the device such as a color filter, an electrode layer, a dielectric layer, an insulating layer, or a semiconductor element. May be constituted.
- the transfer body 6 may be a substance such as metal, ceramics, stone, wood, paper, or the like, or on any surface that constitutes an article (on a clock, on an air conditioner, on a printed circuit board). Or on the surface of a structure such as a wall, a pillar, a beam, a ceiling, or a window glass.
- the irradiation light 7 is irradiated from the back surface side of the substrate 1 (the irradiation light incident surface 12 side). After being transmitted through the substrate 1, the irradiation light 7 irradiates the separation layer 2 from the interface 2 a side.
- in-layer peeling and / or interfacial peeling occurs in the separation layer 2 and the bonding force decreases or disappears, so that when the substrate 1 and the transfer body 6 are separated from each other, Transferred layer 4 is separated from substrate 1 and transferred to transfer body 6.
- FIG. 6 shows a case in which separation in the separation layer 2 has occurred
- FIG. 7 shows a case in which separation in the separation layer 2 at the interface 2 a has occurred.
- the principle that separation within the separation layer 2 and / or interfacial separation occurs is that ablation occurs in the constituent material of the separation layer 2, It is also presumed that this is due to the release of the gas contained in the separation layer 2 and the phase change such as melting and transpiration occurring immediately after the irradiation.
- the abrasion means that the solid material (constituting material of the separation layer 2), which has absorbed the irradiation light, is excited photochemically or thermally, and the surface or internal bonds of atoms or molecules are cut off and released. It mainly appears as a phenomenon in which all or a part of the constituent material of the separation layer 2 undergoes a phase change such as melting and evaporation (vaporization). In addition, the phase change may cause a minute foaming state, and the bonding force may be reduced.
- a phase change such as melting and evaporation (vaporization).
- the phase change may cause a minute foaming state, and the bonding force may be reduced.
- the separation layer 2 causes intra-layer separation, interfacial separation, or both of them depends on the composition of the separation layer 2 and various other factors. Conditions such as type, wavelength, intensity, and reaching depth.
- Irradiation light 7 may be any as long as it causes intra-layer peeling and / or interfacial peeling of separation layer 2, such as X-rays, ultraviolet rays, visible light, infrared rays (heat rays), laser light, and Examples include re-waves, microwaves, electron beams, and radiation (beams,? -Lines, and a-lines). Among them, the laser beam is more likely to cause separation (ablation) of the separation layer 2. Is preferred.
- the laser device for generating the laser beam various gas lasers, solid-state laser is (semiconductor laser one THE), and the like, excimer one
- The, N d-YAG laser, A r laser, C 0 2 laser, CO laser , He—Ne lasers and the like are preferably used, and among them, excimer lasers are particularly preferable.
- the excimer laser outputs high energy in a short wavelength region, it is possible to cause abrasion in the separation layer 2 in a very short time, so that the adjacent or nearby intermediate layer 3 and transfer layer 4 can be formed.
- the separation layer 2 can be peeled off without substantially raising the temperature of the substrate 1 or the like, that is, without causing deterioration or damage.
- the wavelength of the laser light to be irradiated is preferably about 100 to 35 O nm.
- the wavelength of the irradiated laser beam is about 350 to 120 O nm.
- the energy density of the laser beam irradiated particularly the energy density in the case of excimer monodentate may preferably be 1 0 ⁇ 5 0 0 O mJ / cm 2 about, 1 0 0 ⁇ 5 0 O mJ / It is more preferably about cm 2 .
- the irradiation time is preferably about 1 to 100 nsec, and more preferably about 10 to 100 nsec.
- the energy density is low or the irradiation time is short, sufficient abrasion or the like will not occur, and if the energy density is high or the irradiation time is long, the irradiation light transmitted through the separation layer 2 and the intermediate layer 3 will not It may adversely affect the transfer receiving layer 4.
- the irradiation light 7 typified by such a laser beam is irradiated so that its intensity becomes uniform.
- the irradiation direction of the irradiation light 7 is not limited to the direction perpendicular to the separation layer 2 but may be a direction inclined at a predetermined angle with respect to the separation layer 2.
- the irradiation light can be irradiated to the entire region of the separation layer 2 in plural times. The same location may be irradiated more than once.
- irradiation light of different types and different wavelengths (wavelength ranges) may be irradiated to the same region or different regions twice or more.
- the separation layer 2 adhering to the intermediate layer 3 is removed by, for example, a method such as cleaning, etching, asshing, polishing, or a combination thereof.
- the separation layer 2 adhering to the substrate 1 is also removed.
- the substrate 1 is made of an expensive or rare material such as quartz glass
- the substrate 1 is preferably provided for reuse.
- the present invention can be applied to the substrate 1 to be reused, and is highly useful.
- the transfer of the transferred layer 4 to the transfer member 6 is completed. After that, removal of the intermediate layer 3 adjacent to the transferred layer 4 and formation of another arbitrary layer can be performed.
- the transferred layer 4 itself which is the object to be peeled, is not directly peeled, but is peeled off at the separation layer 2 joined to the transferred layer 4. Irrespective of the characteristics, conditions, etc., it can be easily and reliably peeled (transferred) uniformly, without damage to the object to be peeled (transferred layer 4) due to the peeling operation, and High reliability can be maintained.
- the irradiation light 7 is irradiated from the substrate 1 side.
- the irradiation direction of the irradiation light 7 is Is not limited to the above, and irradiation light may be irradiated from the side opposite to the substrate 1.
- a configuration may be employed in which irradiation light is irradiated partially in the surface direction of the separation layer 2, that is, in a predetermined pattern, and the transferred layer 4 is transferred in the pattern (first method).
- the irradiation light incident surface 12 of the substrate 1 is subjected to masking corresponding to the pattern and irradiated with the irradiation light 7, or the irradiation position of the irradiation light 7 Can be precisely controlled.
- the separation layer 2 can be formed in a predetermined pattern (second method).
- the separation layer 2 is formed in a predetermined pattern by masking or the like, or
- the transfer of the transferred layer 4 can be performed together with the patterning and trimming.
- the transfer may be repeated two or more times by the same method as described above.
- the number of transfers is an even number
- the positional relationship between the front and back of the layer to be transferred formed on the last transfer body should be the same as the state where the layer to be transferred was first formed on the substrate 1. Can be.
- a large transparent substrate for example, an effective area of 900 ⁇ 1000
- a small substrate 1 for example, an effective area of 45 mm ⁇ 4 O mm.
- the transfer layer 4 (the thin film transistor) of the small unit is transferred a plurality of times (for example, about 800 times) preferably to adjacent positions sequentially to form the transfer layer 4 over the entire effective area of the large transparent substrate.
- a liquid crystal display having the same size as the large-sized transparent substrate can also be manufactured.
- a plurality of transferred layers 4 formed on the substrate 1 may be prepared, and each transferred layer 4 may be sequentially transferred (overlaid) onto the transfer body 6 to form a stacked body of the transferred layers 4.
- the layers to be transferred 4 to be laminated may be the same or different.
- the above is the method for transferring a thin film structure used in the present invention.
- FIG. 9 is a cross-sectional view schematically illustrating a configuration example of a three-dimensional device.
- FIGS. 10 to 15 are schematic views illustrating steps of a first embodiment of a method for manufacturing a three-dimensional device of the present invention.
- FIG. The description of the common features with the above-described thin film structure transfer method is omitted.
- the three-dimensional device 10 includes a substrate (transfer-side substrate) 21 as a base, a first transfer target layer (first thin-film device layer) 41, 2 transfer layers (second thin film device layers) 42.
- the layers to be transferred 41 and 42 extend in a two-dimensional direction (a direction parallel to the substrate 21), and constitute a predetermined circuit.
- the transferred layer 41 is bonded (joined) to the upper side of the substrate 21 in FIG. 9 via the bonding layer 5.
- the transferred layer 42 is bonded (joined) to the upper side of the transferred layer 41 in FIG. 9 via the conductive adhesive layer 22.
- the transfer-receiving layer 41 has connection electrodes (connection terminals) 411 and 412 on the upper side in FIG. Further, the transfer-receiving layer 41 has connection electrodes 42 1 and 42 2 on the lower side in FIG.
- the connection electrode 4 1 1 of the transferred layer 4 1 and the connection electrode 4 2 1 of the transferred layer 4 2 are electrically connected via a conductive adhesive layer 2 2.
- the first connection electrode 4 1 2 and the connection electrode 4 2 2 of the transferred layer 4 2 are electrically connected via a conductive adhesive layer 2 2.
- the conductive adhesive layer 22 is preferably an anisotropic conductive film (ACF).
- ACF anisotropic conductive film
- connection electrodes 411 and 421 and the connection electrodes 412 and 422 can be easily connected to each other easily.
- the transfer receiving layer 41 and the transfer receiving layer 42 can be bonded (joined) while performing alignment.
- the substrate (transfer-side substrate) 21 of the three-dimensional device 10 corresponds to the transfer body 6 in FIGS.
- Examples of the transfer layers 41 and 42 of the three-dimensional device 10 include, for example, the various layers exemplified as the transfer layer 4 described above.
- the transferred layer 4 1 and 42 D RAM (dynamic RAM), S RAM (Static RAM), E 2 PROM, memory such as a ROM, a CPU, a logic (logic circuitry), Sensors such as an optical sensor and a magnetic sensor can be used.
- D RAM dynamic RAM
- S RAM static RAM
- E 2 PROM electronic circuitry
- memory such as a ROM, a CPU, a logic (logic circuitry)
- Sensors such as an optical sensor and a magnetic sensor can be used.
- the layers to be transferred 41 and 42 are not limited to those described above.
- transfer receiving layer 41 and the transfer receiving layer 42 may be the same or different.
- both the transferred layer 41 and the transferred layer 42 can be a memory (memory cell array). This realizes a large-capacity memory (large-scale memory).
- both the transferred layer 41 and the transferred layer 42 may be formed as logic (logic circuit).
- logic logic circuit
- the three-dimensional device 10 is a system IC (for example, a system LSI) in which a memory and a logic are mixed (integrated).
- the transferred layer 41 and the transferred layer 42 can be formed with different design rules (minimum line width). Also, the transfer layer 4 1 and the transfer layer Layer 42 can be formed with different design parameters. Further, the transferred layer 41 and the transferred layer 42 can be formed by different manufacturing processes. In the past, it was impossible or difficult to change such conditions between stacked layers.
- the minimum line width of the memory in the system IC is, for example, about 0.35 ⁇ m ( ⁇ m rule), and the minimum line width of the logic is, for example, about 0.5 m (m rule) ( (The minimum line width of memory is smaller than the minimum line width of logic.) Conversely, the minimum line width of the memory may be larger than the minimum line width of the logic.
- the three-dimensional device 10 is manufactured by the above-described method of transferring a thin film structure, for example, as described below.
- a separation layer 2 is formed on one surface of a substrate (original substrate) 1. Further, as shown in FIG. 11, a separation layer 2 is formed on one surface of a substrate (original substrate) 1.
- an intermediate layer (underlayer) 3 is formed on the separation layer 2 of each substrate 1.
- a first transferred layer (first thin film device layer) 41 is formed on the intermediate layer 3.
- a second transferred layer (second thin film device layer) 42 is formed on the intermediate layer 3.
- FIG. 10 shows an enlarged cross-sectional view of the K portion of the layer 41 to be transferred (the portion surrounded by a dashed line in FIG. 10).
- the transferred layer 41 has, for example, a thin film transistor (TFT) 60 formed on the intermediate layer 3 (for example, SiO 2 film).
- TFT thin film transistor
- the thin film transistor 60 has a source layer (n + or p + layer) 61 and a drain layer (n + or P + layer) 62 formed by introducing an n-type or p-type impurity into a polysilicon layer.
- connection electrode 411 is formed below the protective film 69 of the thin film transistor 60 in FIG. 10.
- the connection electrode 411 is electrically connected to the electrode 68 via a contact hole formed in the protective film 69.
- FIG. 11 is an enlarged cross-sectional view of a portion K of the layer to be transferred 42 (a portion surrounded by a dashed line in FIG. 11).
- the transferred layer 4 for example, an intermediate layer 3 (e.g., S I_ ⁇ 2 film) has a thin film transistor (TFT) 6 0 formed on.
- TFT thin film transistor
- the thin film transistor 6 0 polysilicon layer n-type or p-type impurity introduced source layer formed (n + or p + layer) 61 and a drain layer (n + or p + layer) 6 2 A channel layer 63; a gate insulating film 64; a gate electrode 65; an interlayer insulating film 66; electrodes 67 and 68 made of, for example, aluminum; and a protective film 69.
- connection electrode 4 21 is formed on the upper side of the protective film 69 of the thin film transistor 60 in FIG.
- the connection electrode 421 is electrically connected to the electrode 67 via a contact hole formed in the protective film 69.
- the structures of the transferred layer 41 near the electrode 4 12 and the transferred layer 42 near the electrode 4 22 are almost the same as those described above, and a description thereof will be omitted.
- a large number of transfer target layers 41 may be simultaneously formed on a single substrate (not shown) (for example, a glass substrate) and cut out.
- a large number of transfer-receiving layers 42 may be simultaneously formed on a single substrate (not shown) (for example, a glass substrate) and then cut out.
- the substrate on which the layers to be transferred 41 and 42 are formed is set in the probe device, and the stylus is connected to the connection electrodes and the terminals (not shown) of the layers to be transferred 41 and 42, respectively. Then, an electrical characteristic inspection of each of the transfer receiving layers 41 and 42 is performed. Then, the transfer receiving layers 41 and 42 determined to be unsatisfactory are marked with an indicator or a scratch needle.
- each of the transfer receiving layers 41 and 42 is individually diced.
- the individual transferred layers 41 and 42 are sorted into defective and non-defective products according to the presence or absence of the marking. After the dicing, the electrical characteristics of each of the transferred layers 41 and 42 may be inspected.
- the transfer-receiving layer 41 and the transfer-receiving layer 42 may be manufactured simultaneously, and in particular, may be manufactured simultaneously on the same substrate (original substrate) 1. This allows the process The number can be reduced.
- the transfer-receiving layer 41 formed on the substrate 1 and the substrate (transfer-side substrate) 21 are bonded (joined) via the bonding layer 5.
- irradiation light 7 is emitted from the back side of substrate 1 (irradiation light incident surface 12 side). As described above, the irradiation light 7 is transmitted through the substrate 1 and is then applied to the separation layer 2, thereby causing separation within the separation layer 2 and / or interfacial separation, thereby reducing or eliminating the bonding force. I do.
- the substrate 1 and the substrate 21 are separated from each other.
- the transferred layer 41 is separated from the substrate 1 and transferred to the substrate 21.
- the intermediate layer 3 and the separation layer 2 on the transferred layer 4 1 are removed by, for example, a method such as cleaning, etching, assembling, polishing, or a combination thereof. . If necessary, the intermediate layer 3 may be left so that the connection electrodes 411 and 412 are exposed.
- the separation layer 2 attached to the substrate 1 is also removed.
- the substrate 1 is made of an expensive or rare material such as quartz glass
- the substrate 1 is preferably provided for reuse.
- the present invention can be applied to the substrate 1 to be reused, and is highly useful.
- the transfer of the transfer receiving layer 41 to the substrate 21 is completed. After that, other arbitrary layers can be formed.
- connection electrode 4 1 1 faces the connection electrode 4 2 1
- connection electrodes 4 1 2 and 4 2 2 The transfer layer 42 formed on the substrate 1 and the transfer layer 41 transferred to the substrate 21 are bonded (joined) via the conductive bonding layer 22 while positioning so that they face each other. I do.
- the conductive adhesive layer 22 is preferably made of an anisotropic conductive film.
- the present invention is not limited to this.
- a predetermined conductive adhesive is filled (arranged) between the transferred layer 41 and the transferred layer 42, and the conductive adhesive is applied in FIG. While pressing vertically Let it cure.
- the transfer receiving layer 41 and the transfer receiving layer 42 are bonded via the conductive adhesive layer 22, and the conductive particles (not shown) in the conductive adhesive layer 22 move in the vertical direction in FIG.
- the connection electrode 4 11 and the connection electrode 4 2 1 and the connection electrode 4 1 2 and the connection electrode 4 2 2 are electrically connected to each other through the conductive particles.
- the irradiation light 7 is irradiated from the back side of the substrate 1 (the irradiation light incident surface 12 side). As described above, the irradiation light 7 is transmitted through the substrate 1 and is then applied to the separation layer 2, thereby causing separation within the separation layer 2 and / or interfacial separation, thereby reducing or eliminating the bonding force. I do.
- the substrate 1 and the substrate 21 are separated from each other.
- the transferred layer 42 is separated from the substrate 1 and is transferred onto the transferred layer 41.
- FIG. 15 is an enlarged cross-sectional view of the K portion (the portion surrounded by a dashed line in FIG. 15) of the transfer receiving layers 41 and 42 and the conductive adhesive layer 22.
- the intermediate layer 3 and the separation layer 2 on the transferred layer 42 are removed by, for example, a method such as cleaning, etching, assembling, polishing, or a combination thereof. .
- the intermediate layer 3 may be left if necessary.
- the separation layer 2 attached to the substrate 1 is also removed.
- the substrate 1 is made of an expensive or rare material such as quartz glass
- the substrate 1 is preferably provided for reuse.
- the present invention can be applied to the substrate 1 to be reused, and is highly useful.
- a three-dimensional device for example, three-dimensional IC 10 can be easily manufactured by transfer.
- each thin film device layer can be made independently, there is no need to consider the adverse effects on the lower layer (lower thin film device layer) as in the past, and there is a wide range of manufacturing conditions.
- the degree of integration can be improved. In other words, ICs can be formed in a relatively small area even with relatively loose design rules.
- each thin film device layer can be once formed on a different substrate, each thin film device layer can be formed with any device parameters (eg, gate line width, gate insulating film thickness, It can be formed according to design rules, manufacturing conditions such as manufacturing temperature, etc.). For this reason, each thin film device layer can be formed with the optimal device parameters, and as a result, a highly reliable and high-performance 3D device 1
- the three-dimensional device 10 is a system IC (for example, a system LSI) in which memory and logic are mixed (integrated), when manufacturing the system IC, processes corresponding to the memory and logic are respectively performed. Since it can be formed in a single layer, it is easy to manufacture, has high productivity, and is advantageous for mass production.
- a system IC for example, a system LSI
- memory and logic are mixed (integrated)
- processes corresponding to the memory and logic are respectively performed. Since it can be formed in a single layer, it is easy to manufacture, has high productivity, and is advantageous for mass production.
- connection electrodes terminals for connection
- adjacent thin film device layers can be easily and reliably electrically connected to each other.
- 10 can be made three-dimensional (a circuit in three-dimensional directions can be configured).
- the yield is lower than when three-dimensional devices are manufactured by sequentially forming each layer on the same substrate (directly forming each layer). high.
- transfer to various substrates 21 can be performed irrespective of the substrate (transfer-side substrate) 21. That is, even if a thin-film device layer cannot be directly formed or is not suitable for forming, a material that can be easily formed, or a material made of inexpensive materials, etc., it should be formed by transfer. Can be. In other words, since the substrate 21 has a degree of freedom, for example, an IC can be formed on a flexible substrate. IC cards and the like can be easily manufactured.
- the substrate (original substrate) 1 a relatively inexpensive and large-area glass substrate can be used, so that the cost can be reduced.
- the number of times of transfer of the layers to be transferred (thin film device layers) 41 and 42 is one each.
- the layers to be transferred 41 and the layers to be transferred 42 The number of times of transfer of the transferred layer 41 may be two or more as long as the layers can be laminated, and the number of times of transfer of the transferred layer 42 may be two or more.
- the transfer target layer on the substrate 1 is transferred onto a third substrate (not shown) other than the substrate 1 and the substrate 21, and thereafter, The transfer layer on the substrate of No. 3 is transferred onto the substrate 21. Note that the above-described separation layer 2 and the like are formed on the third substrate.
- the transfer number of the transferred layer is an even number
- the positional relationship between the front and back of the transferred layer formed on the substrate (transfer-side substrate) 21 which is the final transfer body is first determined by the substrate (original substrate). This can be the same as the state where the transfer layer is formed in 1.
- the transfer layer 41 is directly formed on the substrate (transfer-side substrate) 21, and the transfer layer 42 is transferred onto the transfer layer 41 by the above-described transfer method.
- a three-dimensional device 10 may be manufactured.
- three or more layers to be transferred may be laminated.
- the degree of integration can be further increased.
- connection electrodes 431 and 432 are formed at one end (the lower side in FIG. 16) of the transferred layer 43, and the connection electrodes 433 and 432 are formed at the other end (the upper side in FIG. 16).
- connection electrode 4 1 1 of the transfer layer 4 1 is electrically connected to the connection electrode 4 3 1 of the transfer layer 4 3 via the conductive adhesive layer 22, and the connection electrode of the transfer layer 4 1 4 1 2 and The transfer layer 43 is electrically connected to the connection electrode 43 via the conductive adhesive layer 22.
- connection electrodes 4 3 3 of the transfer layer 4 3 and the connection electrodes 4 2 1 of the transfer layer 4 2 are electrically connected via the conductive adhesive layer 23, and the transfer electrodes 4 3
- the connection electrode 4 3 4 is electrically connected to the connection electrode 4 2 2 of the transfer layer 4 2 via the conductive adhesive layer 2 3.
- the conductive adhesive layer 23 is preferably an anisotropic conductive film for the same reason as the conductive adhesive layer 22.
- all the layers may be the same, or all the layers may be different, and only some of the layers may be the same. Is also good.
- FIG. 17 is a cross-sectional view schematically illustrating a configuration example of a three-dimensional device. The description of the common points with the first embodiment will be omitted, and the main differences will be described.
- the three-dimensional device 10 shown in FIG. 17 is also manufactured by a method of transferring a thin film structure, similarly to the first embodiment.
- connection electrode 411 of the first transfer layer (first thin film device layer) 41 and the second transfer layer (second 2 Thin film device layer) 4 2 Connecting electrodes 4 2 1 are brought into contact and they are electrically connected, and connecting electrodes 4 1 2 of transferred layer 4 1 and connecting electrodes 4 2 of transferred layer 4 2 are connected. 2 are brought into contact with each other to electrically connect them, and the transfer receiving layer 41 and the transfer receiving layer 42 are bonded (joined) through the bonding layer 24.
- the method of bonding (joining) the transfer-receiving layer 41 and the transfer-receiving layer 42 and the method of electrically connecting the corresponding connection electrodes are described in the first embodiment described above.
- the invention is not limited to the second embodiment.
- the connecting electrode 4 11 and the connecting electrode 4 2 1 and the connecting electrode 4 1 2 and the connecting electrode 4 2 2 are brought into contact with each other, and they are heated, and the contact surface is once melted and solidified, thereby responding. May be fixed to each other.
- the corresponding connection electrodes are electrically connected to each other, and the transferred layer 41 and the transferred layer 42 are joined.
- Solder conductive brazing material
- solder may be disposed between the solder and the solder, and these solders may be heated, melted, and solidified. Accordingly, the corresponding connection electrodes are electrically connected to each other via the solder, and the transfer receiving layer 41 and the transfer receiving layer 42 are bonded (joined) via the solder.
- FIG. 18 is a cross-sectional view schematically illustrating a configuration example of a three-dimensional device. The description of the common points with the first embodiment will be omitted, and the main differences will be described.
- the three-dimensional device 10 shown in FIG. 18 is also manufactured by a method of transferring a thin film structure, similarly to the first embodiment described above.
- a light emitting section (light emitting element) 413 and a light receiving section (light receiving section) (Element) 4 14 is formed.
- a light emitting section (light emitting element) 4 2 3 and a light receiving section (light receiving element) 4 2 4 are formed.
- the corresponding light emitting unit and light receiving unit face each other, that is, the light emitting unit 4 13 and the light receiving unit 4 2 4 face each other, and the light emitting unit 4 2
- the transfer layer 4 1 and the transfer layer 4 2 are substantially transparent (with respect to light from the light emitting sections 4 13 and 4 2 3) while positioning the light receiving sections 4 and 4 so that they face each other. (It has light transmittance).
- an organic EL element can be used as the light emitting sections 4 13 and 4 23 in the three-dimensional device 10.
- FIG. 19 is a cross-sectional view showing a configuration example of the organic EL device.
- the organic EL element 30 includes a partition (bank) 34, a transparent electrode 31 and a light emitting layer (organic EL) 32 formed inside the partition 34, and a metal electrode 3. It consists of three.
- the light emitting layer 32 is formed on the transparent electrode 31, and the metal electrode 33 is formed on the partition wall 34 and the light emitting layer 32.
- the transparent electrode 31 is made of, for example, ITO or the like.
- the light-emitting layer 32 is mainly composed of, for example, a precursor of a conjugated polymer organic compound that mainly forms the light-emitting layer 32 and a predetermined solvent such as a fluorescent dye for changing the light-emitting characteristics of the light-emitting layer 32.
- the composition for an organic EL device (composition for the light emitting layer 32) dissolved or dispersed in a (polar solvent) is subjected to a heat treatment, and the precursor in the composition for an organic EL device is polymerized into a thin film. (Solid thin film).
- the metal electrode 33 is made of, for example, A1-Li.
- the partition wall 34 is made of, for example, a resin black resist.
- a drive unit (drive circuit) (not shown) for driving the organic EL element 30 is formed on each of the layers to be transferred 41 and 42.
- this organic EL element 30 when a predetermined voltage is applied between the transparent electrode 31 and the metal electrode 33 from the drive circuit, electrons and holes are injected into the light emitting layer 32, They move and recombine in the light-emitting layer 32 due to the electric field generated by the applied voltage.
- Exciton (exciton) is generated by the energy released at the time of this recombination, and the exciton emits energy (fluorescence and phosphorescence) when returning to the ground state. That is, it emits light.
- the above phenomenon is called EL emission.
- PIN photodiodes can be used as the light receiving sections 414 and 424 in the three-dimensional device 10.
- FIG. 20 is a cross-sectional view showing a configuration example of a PIN photodiode.
- the PIN photodiode 50 has a light receiving unit window electrode 51, a p-type a-SiC layer (p-type semiconductor layer) 52, and an i-type a-Si layer (semiconductor layer). ) 53, an n-type a-SiC layer (n-type semiconductor layer) 54, and an 8 1-3: 1-011 layer 55 which also serves as an upper electrode and wiring (electrical wiring) of the light receiving section. I have.
- the light-receiving window electrode 51, the p-type a-SiC layer 52, the i-type a-Si layer 53, the n-type a-SiC layer 54 and the A1-Si-Cu layer 55 The layers are stacked in this order from the lower side in FIG.
- the light-receiving unit window electrode 51 is made of, for example, ITO.
- the organic EL element 30 emits light when driven by a drive circuit (not shown) electrically connected to the organic EL element 30. That is, the organic EL element 30 transmits (transmits) an optical signal (light).
- the light from the organic EL element 30 passes through the adhesive layer 25 and enters from the light receiving unit window electrode 51. That is, the light is received by the PIN photodiode 50.
- a current having a magnitude corresponding to the amount of received light that is, an electric signal (signal) is output from the PIN photodiode 50 (the optical signal is converted into an electric signal and output).
- a circuit (not shown) electrically connected to the PIN photodiode 50 operates.
- the light from the light emitting portion 4 13 passes through the adhesive layer 25 and is received by the light receiving portion 4 24, and the light from the light emitting portion 4 23 The light passes through the layer 25 and is received by the light receiving section 4 14. That is, the light emitting sections 4 13 and 4 23 and the light receiving sections 4 14 and 4 24 perform communication by light (optical signal) between the transfer receiving layer 41 and the transfer receiving layer 42.
- the signal transmission between the layers is performed not by electricity (electric signal) but by light (optical signal), so that the manufacturing is easy. Can be further enhanced.
- the light emitting sections 4 13 and 4 23 are not limited to the organic EL elements, but include, for example, an inorganic EL element, a light emitting diode (LED), a semiconductor laser (laser diode), and the like. Is also good.
- the light receiving sections 4 14 and 4 24 are not limited to PIN photodiodes, but may be, for example, various types of photodiodes such as PN photodiodes, avalanche photodiodes, phototransistors, and phototransistors. It may be composed of luminescence (organic photoluminescence, inorganic photoluminescence, etc.).
- the method of bonding (joining) the transferred layer (thin film device layer) 41 and the transferred layer (thin film device layer) 42 is not limited to the method described above. That is, the transfer layer 41 and the transfer layer 42 are bonded (joined) so that communication by light (optical signal) is possible between the transfer layer 41 and the transfer layer 42. I just want to be able.
- the transfer receiving layer 41 and the transfer receiving layer 42 may be partially bonded (joined).
- the transferred layer 41 and the transferred layer 42 may be bonded (joined) with an opaque adhesive layer.
- a spacer (for example, a pillar) is provided between the transferred layer 41 and the transferred layer 42, and the transferred layer 41 and the transferred layer 42 are bonded via the spacer ( Bonding).
- a space is formed between the light emitting portion 4 13 and the light receiving portion 4 14 of the transferred layer 4 1 and the light receiving portion 4 2 4 and the light emitting portion 4 2 3 of the transferred layer 4 2 .
- the light emitting section 4 13 and the light receiving section 4 14 of the transferred layer 41 may be brought into contact with the light receiving section 4 24 and the light emitting section 4 23 of the transferred layer 4 2.
- the number of layers to be transferred (thin film device layers) of a three-dimensional device is three or more, it is configured such that communication by light (optical signal) is possible between non-adjacent layers. May be.
- the light emitting section is constituted by a plurality of light emitting elements having different light emission characteristics (for example, peak wavelength of emitted light), and the light receiving section is constituted by a plurality of light receiving elements for receiving light from the corresponding light emitting element. You may comprise.
- a plurality of light emitting units having different light emitting characteristics may be provided, and a plurality of light receiving units for receiving light from the corresponding light emitting units may be provided.
- the present invention in at least one predetermined transferred layer (thin film device layer), communication by light (optical signal) between the transferred layers (thin film device layers) is performed.
- optical signal optical signal
- the method for manufacturing the three-dimensional device of the present invention has been described based on the illustrated embodiment, and the present invention is not limited thereto.
- the predetermined layers to be transferred are the same as those in the first embodiment or the second embodiment. Electrically connected as in the second embodiment (hereinafter referred to as “electrically connected”), and communication with light (optical signal) is possible between the other layers to be transferred as in the third embodiment. (Hereinafter referred to as “optically connected”). O In the present invention, a part of the predetermined layer to be transferred may be electrically connected and the remaining part may be optically connected.
- At least one of a plurality of transfer-receiving layers (thin film device layers) constituting a three-dimensional device is transferred by the above-described thin film structure transfer method (transfer technique) to manufacture the device. I just need.
- the thin-film device layers are stacked by the transfer method, so that a three-dimensional device (for example, a three-dimensional IC) can be easily manufactured. it can.
- a three-dimensional device for example, a three-dimensional IC
- each thin-film device layer can be formed independently, there is no need to consider the adverse effects on the lower layer (lower thin-film device layer) as in the conventional case, and the manufacturing conditions are wide.
- the degree of integration can be increased.
- each thin film device layer can be formed on a different substrate, each thin film device layer can be formed with optimal device parameters, thereby providing high reliability and high performance.
- Device can be provided.
- only non-defective thin-film device layers can be selected and laminated for each layer. Therefore, when a three-dimensional device is manufactured by sequentially forming each layer on the same substrate (directly forming each layer). Higher yield can be obtained compared to.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US09/403,342 US6627518B1 (en) | 1998-02-27 | 1999-02-23 | Method for making three-dimensional device |
KR10-1999-7009413A KR100484959B1 (ko) | 1998-02-27 | 1999-02-23 | 3차원 디바이스의 제조 방법 |
EP99903937A EP0986104A4 (en) | 1998-02-27 | 1999-02-23 | MANUFACTURING METHOD FOR A THREE-DIMENSIONAL COMPONENT |
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JP10/48410 | 1998-02-27 | ||
JP04841098A JP4126747B2 (ja) | 1998-02-27 | 1998-02-27 | 3次元デバイスの製造方法 |
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PCT/JP1999/000819 WO1999044236A1 (en) | 1998-02-27 | 1999-02-23 | Method of manufacturing three-dimensional device |
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US (1) | US6627518B1 (ja) |
EP (1) | EP0986104A4 (ja) |
JP (1) | JP4126747B2 (ja) |
KR (1) | KR100484959B1 (ja) |
CN (1) | CN1132245C (ja) |
TW (1) | TW426869B (ja) |
WO (1) | WO1999044236A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
KR100484959B1 (ko) | 2005-04-25 |
CN1256791A (zh) | 2000-06-14 |
EP0986104A4 (en) | 2003-07-30 |
KR20010006328A (ko) | 2001-01-26 |
US6627518B1 (en) | 2003-09-30 |
CN1132245C (zh) | 2003-12-24 |
JP4126747B2 (ja) | 2008-07-30 |
TW426869B (en) | 2001-03-21 |
EP0986104A1 (en) | 2000-03-15 |
JPH11251517A (ja) | 1999-09-17 |
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