DE10313606A1 - Micro-structuring a semiconductor chip used in optics and optoelectronics comprises using a mechanical process - Google Patents
Micro-structuring a semiconductor chip used in optics and optoelectronics comprises using a mechanical process Download PDFInfo
- Publication number
- DE10313606A1 DE10313606A1 DE10313606A DE10313606A DE10313606A1 DE 10313606 A1 DE10313606 A1 DE 10313606A1 DE 10313606 A DE10313606 A DE 10313606A DE 10313606 A DE10313606 A DE 10313606A DE 10313606 A1 DE10313606 A1 DE 10313606A1
- Authority
- DE
- Germany
- Prior art keywords
- semiconductor chip
- microstructuring
- mechanical
- plastic layer
- structuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 40
- 230000005693 optoelectronics Effects 0.000 title claims description 11
- 238000010297 mechanical methods and process Methods 0.000 title abstract 2
- 230000005226 mechanical processes and functions Effects 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims description 31
- 230000005855 radiation Effects 0.000 claims description 12
- 238000005530 etching Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 238000007517 polishing process Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 238000001020 plasma etching Methods 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0236—Special surface textures
- H01L31/02363—Special surface textures of the semiconductor body itself, e.g. textured active layers
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Mikrostrukturierung einer Oberfläche eines Halbleiterchips.The The invention relates to a method for microstructuring a surface of a Semiconductor chips.
Mikrostrukturierte
Oberflächen
finden Anwendungen in weiten Gebieten der Technik, insbesondere
auch in der Optik und Optoelektronik. Beispielsweise wird in der
Die
Mikrostrukturierung einer Oberfläche
erlaubt es auch, optische Eigenschaften der Oberfläche wie
beispielsweise die Reflektivität
zu verändern. Zum
Beispiel offenbart die
Die Mikrostrukturierung von Halbleiterchips erfolgt bisher üblicherweise mit Ätzverfahren, mit denen sich aber definierte dreidimensionale Strukturen gar nicht oder nur unter erheblichem Aufwand realisieren lassen.The Microstructuring of semiconductor chips has hitherto usually been done with etching, but with them defined three-dimensional structures not at all or only at considerable expense.
Der Erfindung liegt die Aufgabe zugrunde, ein vorteilhaftes Verfahren zur Mikrostrukturierung einer Oberfläche eines Halbleiterchips anzugeben, das insbesondere dazu geeignet ist, definierte dreidimensionale Strukturen herzustellen.Of the Invention is based on the object, an advantageous method to specify the microstructuring of a surface of a semiconductor chip, which is particularly suitable for defined three-dimensional To produce structures.
Diese Aufgabe wird erfindungsgemäß durch Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausführungsformen des Verfahrens sind Gegenstand der Unteransprüche.This The object is achieved by methods solved with the features of claim 1. Advantageous embodiments of the method are the subject of the dependent claims.
Erfindungsgemäß erfolgt eine Mikrostrukturierung eines Halbleiterchips durch mechanische Bearbeitung. Die mechanische Bearbeitung kann zum Beispiel durch Schleifen, Fräsen oder Walzen erfolgen.According to the invention a microstructuring of a semiconductor chip by mechanical Processing. The mechanical processing can for example by Grinding, milling or rolling done.
Eine mechanische Mikrostrukturierung ist insbesondere für optoelektronische Bauelemente vorteilhaft, die Strahlung aussenden oder empfangen, um die Ein- beziehungsweise Auskopplung der Strahlung aus dem Bauelement durch Verringerung der Totalreflexion an der Oberfläche zu verbessern.A mechanical microstructuring is especially for optoelectronic Advantageous components that emit or receive radiation, to the coupling or decoupling of the radiation from the device by improving the total reflection at the surface.
Aufgrund des im Vergleich zur umgebenden Luft höheren Brechungsindex eines Halbleitermaterials, bei dem es sich beispielsweise um GaAs oder SiC handeln kann, tritt an der Halbleiter-Luft-Grenzfläche oberhalb eines kritischen Winkels Totalreflexion auf. Im Fall eines unstrukturierten Halbleiterchips sind die vorder- und rückseitigen Oberflächen des Substrats koplanar, so daß Mehrfachreflexionen unter jeweils gleichem Einfallswinkel eine Auskopplung der Strahlung verhindern können. Solche Mehrfachreflexionen werden durch eine Mikrostrukturierung vorteilhaft verringert und so die Strahlungsausbeute erhöht.by virtue of of the higher refractive index of one compared to the surrounding air Semiconductor material, which is for example GaAs or SiC can act at the semiconductor-air interface above of a critical angle total reflection on. In the case of an unstructured Semiconductor chips are the front and back surfaces of the substrate coplanar, so that multiple reflections in each case the same angle of incidence a decoupling of the radiation can prevent. Such multiple reflections are advantageous by microstructuring reduces and thus increases the radiation yield.
Die erzeugten Mikrostrukturen weisen dazu bevorzugt eine definierte dreidimensionale Form auf. Beispielsweise können die dreidimensionalen Mikrostrukturen eine derartige Form aufweisen, daß auf die Oberflächen auftreffende Strahlung entweder nicht total reflektiert wird oder total reflektierte Strahlung nach einer erneuten Reflexion an der gegenüberliegenden Seite des Halbleiterchips beim zweiten Auftreffen auf die Oberfläche unter einem derartigen Winkel auf die Oberfläche auftrifft, daß keine Totalreflexion stattfindet.The microstructures produced to have preferably a defined three-dimensional shape. For example, the three-dimensional Microstructures have a shape such that on the surfaces incident radiation is either not totally reflected or totally reflected radiation after a new reflection at the opposite Side of the semiconductor chip on the second impact on the surface below impinges on the surface at such an angle that no Total reflection takes place.
Insbesondere kann es sich bei den erzeugten dreidimensionalen Strukturen um Pyramiden, Pyramidenstümpfe oder prismenförmige Strukturen handeln.In particular For example, the generated three-dimensional structures may be pyramids, truncated pyramids or prismatic Structures act.
An die mechanische Mikrostrukturierung des Halbleiterchips schließt sich vorteilhaft ein Ätzprozeß an, um Kristallstörungen zu beseitigen und/oder eine Oberflächenrauhigkeit gezielt einzustellen. Bei diesem Ätzprozeß kann es sich beispielsweise um einen naßchemischen Ätzprozeß oder einen Plasmaätzprozeß (z.B. RIE-Reactive Ion Etching) handeln. Ebenso kann sich an die mechanische Mikrostrukturierung der Oberfläche ein Polierprozeß anschließen.On the mechanical microstructuring of the semiconductor chip closes advantageously an etching process to crystal defects to eliminate and / or set a surface roughness targeted. In this etching process it can For example, a wet chemical etching process or a Plasma etching process (e.g. RIE Reactive Ion Etching). Similarly, the mechanical Microstructuring of the surface connect a polishing process.
Vorteilhaft wird vor der mechanischen Mikrostrukturierung mindestens eine Schicht auf die Oberfläche des Halbleiterchips aufgebracht. Diese Schicht dient insbesondere zum Schutz weiter darunter liegender Schichten, beispielsweise einer aktiven Schicht eines optoelektronischen Halbleiterbauelements.Advantageous is at least one layer before the mechanical microstructuring on the surface of the semiconductor chip applied. This layer is used in particular to protect further underlying layers, such as one active layer of an optoelectronic semiconductor device.
Weiterhin ist es möglich, vor der mechanischen Mikrostrukturierung eine Kunststoffschicht, beispielsweise einen Photolack, auf die Oberfläche des Halbleiterchips aufzubringen. In diesem Fall erfolgt zunächst eine mechanische Mikrostrukturierung der Kunststoffschicht, was insbesondere den Vorteil hat, daß der Werkzeugverschleiß, der bei einer direkten Strukturierung des Halbleitermaterials aufgrund der Härte des Halbleiters auftritt, reduziert wird. Die mechanische Mikrostrukturierung der Kunststoffschicht hat außerdem den Vorteil, daß sich so Strukturen herstellen lassen, die sich in einem photolithographischen Belichtungsprozeß nur äußerst schwierig oder gar nicht realisieren lassen. An die Strukturierung der Kunststoffschicht schließt sich ein Ätzprozeß an, mit dem die in der Kunststoffschicht erzeugte Strukturierung in das Halbleitermaterial übertragen wird.Furthermore, it is possible, prior to the mechanical microstructuring, to apply a plastic layer, for example a photoresist, to the surface of the semiconductor chip. In this case, first a mechanical microstructuring of the plastic layer, which has the particular advantage that the tool wear, which occurs in a direct structuring of the semiconductor material due to the hardness of the semiconductor, is reduced. The mechanical microstructuring of the plastic layer also has the advantage that in this way it is possible to produce structures which are extremely difficult or impossible to realize in a photolithographic exposure process. To the struktu tion of the plastic layer is followed by an etching process, with which the structuring generated in the plastic layer is transferred into the semiconductor material.
Die
Erfindung wird im folgenden anhand von zwei Ausführungsbeispielen im Zusammenhang
mit den
Es zeigenIt demonstrate
Der
in
Bei
dem Halbleiterchip
Vorteilhaft
wird vor der mechanischen Bearbeitung eine Schicht
In
einer Variante des Verfahrens wird vor der Strukturierung des Halbleiterchips
Die Beschreibung der Erfindung anhand der Ausführungsbeispiele ist selbstverständlich nicht als Beschränkung auf diese zu verstehen.The Description of the invention with reference to the embodiments is of course not as a restriction to understand this.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10313606A DE10313606A1 (en) | 2003-03-26 | 2003-03-26 | Micro-structuring a semiconductor chip used in optics and optoelectronics comprises using a mechanical process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10313606A DE10313606A1 (en) | 2003-03-26 | 2003-03-26 | Micro-structuring a semiconductor chip used in optics and optoelectronics comprises using a mechanical process |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10313606A1 true DE10313606A1 (en) | 2004-10-14 |
Family
ID=32980725
Family Applications (1)
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---|---|---|---|
DE10313606A Ceased DE10313606A1 (en) | 2003-03-26 | 2003-03-26 | Micro-structuring a semiconductor chip used in optics and optoelectronics comprises using a mechanical process |
Country Status (1)
Country | Link |
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DE (1) | DE10313606A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006024423A1 (en) * | 2006-02-15 | 2007-08-16 | Osram Opto Semiconductors Gmbh | Structure producing method for multiple opto-electronic components, involves producing pressure between roller and auxiliary carrier by relative movement of roller relatively to auxiliary carrier |
FR2935842A1 (en) * | 2008-09-05 | 2010-03-12 | Commissariat Energie Atomique | Textured zone forming method for solar cell substrate, involves forming mask in film by applying pressure using mold, and etching mask and substrate till mask is entirely removed, where mask has patterns complementary to that of substrate |
WO2010072187A3 (en) * | 2008-12-23 | 2010-10-21 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor chip and method for producing an optoelectronic semiconductor chip |
DE102009038028A1 (en) * | 2009-08-18 | 2011-02-24 | Carl Zeiss Microlmaging Gmbh | Detector arrangement with increased sensitivity |
US9174400B2 (en) | 2006-02-15 | 2015-11-03 | Osram Opto Semiconductors Gmbh | Method for producing structures in optoelectronic components and device for this purpose |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0405757A2 (en) * | 1989-06-27 | 1991-01-02 | Hewlett-Packard Company | High efficiency light-emitting diode |
DE4242264A1 (en) * | 1992-12-15 | 1994-06-16 | Gubela Sen Hans Erich | Process for the production of micro double triple surfaces and their tools |
US5772905A (en) * | 1995-11-15 | 1998-06-30 | Regents Of The University Of Minnesota | Nanoimprint lithography |
JP2000167926A (en) * | 1998-12-07 | 2000-06-20 | Idemitsu Petrochem Co Ltd | Manufacture of micro-embossed sheet |
DE10064448A1 (en) * | 2000-12-22 | 2002-07-04 | Osram Opto Semiconductors Gmbh | Process for roughening a semiconductor chip for optoelectronics |
-
2003
- 2003-03-26 DE DE10313606A patent/DE10313606A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0405757A2 (en) * | 1989-06-27 | 1991-01-02 | Hewlett-Packard Company | High efficiency light-emitting diode |
DE4242264A1 (en) * | 1992-12-15 | 1994-06-16 | Gubela Sen Hans Erich | Process for the production of micro double triple surfaces and their tools |
US5772905A (en) * | 1995-11-15 | 1998-06-30 | Regents Of The University Of Minnesota | Nanoimprint lithography |
JP2000167926A (en) * | 1998-12-07 | 2000-06-20 | Idemitsu Petrochem Co Ltd | Manufacture of micro-embossed sheet |
DE10064448A1 (en) * | 2000-12-22 | 2002-07-04 | Osram Opto Semiconductors Gmbh | Process for roughening a semiconductor chip for optoelectronics |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006024423A1 (en) * | 2006-02-15 | 2007-08-16 | Osram Opto Semiconductors Gmbh | Structure producing method for multiple opto-electronic components, involves producing pressure between roller and auxiliary carrier by relative movement of roller relatively to auxiliary carrier |
US9174400B2 (en) | 2006-02-15 | 2015-11-03 | Osram Opto Semiconductors Gmbh | Method for producing structures in optoelectronic components and device for this purpose |
FR2935842A1 (en) * | 2008-09-05 | 2010-03-12 | Commissariat Energie Atomique | Textured zone forming method for solar cell substrate, involves forming mask in film by applying pressure using mold, and etching mask and substrate till mask is entirely removed, where mask has patterns complementary to that of substrate |
WO2010072187A3 (en) * | 2008-12-23 | 2010-10-21 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor chip and method for producing an optoelectronic semiconductor chip |
CN102227825A (en) * | 2008-12-23 | 2011-10-26 | 欧司朗光电半导体有限公司 | Optoelectronic semiconductor chip and method for producing optoelectronic semiconductor chip |
US8816353B2 (en) | 2008-12-23 | 2014-08-26 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor chip and method for producing an optoelectronic semiconductor chip |
CN102227825B (en) * | 2008-12-23 | 2014-09-24 | 欧司朗光电半导体有限公司 | Optoelectronic semiconductor chip and method for producing optoelectronic semiconductor chip |
DE102009038028A1 (en) * | 2009-08-18 | 2011-02-24 | Carl Zeiss Microlmaging Gmbh | Detector arrangement with increased sensitivity |
US8497464B2 (en) | 2009-08-18 | 2013-07-30 | Carl Zeiss Microscopy Gmbh | Detector arrangement having increased sensitivity |
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