US20100006327A1 - Circuit board structure - Google Patents
Circuit board structure Download PDFInfo
- Publication number
- US20100006327A1 US20100006327A1 US12/260,096 US26009608A US2010006327A1 US 20100006327 A1 US20100006327 A1 US 20100006327A1 US 26009608 A US26009608 A US 26009608A US 2010006327 A1 US2010006327 A1 US 2010006327A1
- Authority
- US
- United States
- Prior art keywords
- circuit board
- main body
- rigid
- board main
- pattern
- 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.)
- Abandoned
Links
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- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 6
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
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- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0284—Details of three-dimensional rigid printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/142—Arrangements of planar printed circuit boards in the same plane, e.g. auxiliary printed circuit insert mounted in a main printed circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
- H05K3/182—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method
- H05K3/185—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method by making a catalytic pattern by photo-imaging
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/4007—Surface contacts, e.g. bumps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0236—Plating catalyst as filler in insulating material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09045—Locally raised area or protrusion of insulating substrate
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09118—Moulded substrate
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09145—Edge details
- H05K2201/09163—Slotted edge
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09372—Pads and lands
- H05K2201/09436—Pads or lands on permanent coating which covers the other conductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/095—Conductive through-holes or vias
- H05K2201/09509—Blind vias, i.e. vias having one side closed
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09845—Stepped hole, via, edge, bump or conductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
- H05K2203/1305—Moulding and encapsulation
- H05K2203/1327—Moulding over PCB locally or completely
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4661—Adding a circuit layer by direct wet plating, e.g. electroless plating; insulating materials adapted therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49126—Assembling bases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49128—Assembling formed circuit to base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49158—Manufacturing circuit on or in base with molding of insulated base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
Definitions
- the present invention relates to a circuit board structure.
- the present invention relates to a circuit board having a three-dimensional circuit structure and the fabrication method thereof.
- circuit boards are essential devices in all electronic products where circuit boards are used to bear all kinds of electronic elements such as chips, resistors or capacitors. There are many layers of wires to connect these electronic elements.
- circuit boards are always placed in limited space in the product, or interconnected with another outer circuit boards by buses or module-connectors, such as in the automobile instrumental panels or steering wheel with electronic functions.
- buses or module-connectors such as in the automobile instrumental panels or steering wheel with electronic functions.
- efficiently using substrate or the surface of module shell to pattern three-dimensional circuit layout or reducing the use of buses may be more efficient to utilize the space and increase the flexibility of designing.
- conventional circuit manufacturing technology can only form two-dimensional wire trace instead of three-dimensional pattern.
- It is another objective of the present invention to provide a circuit board structure includes a circuit board main body and an injection molded three-dimensional circuit device encapsulating at least a portion of the circuit board main body.
- the three-dimensional circuit device includes a molded plastic body having a non-plate type, stereo structure, on which a three-dimensional pattern is fabricated. The three-dimensional pattern is interconnected with a contact pad on the circuit board main body through a conductive via.
- a circuit board main body is provided.
- a molded plastic body is formed by encapsulating at least a portion of the circuit board main body with injection molded material.
- a first three-dimensional pattern is formed on the molded plastic body thereby defining a three-dimensional circuit device.
- FIG. 1 illustrates a cross-sectional view of a circuit board structure according to an embodiment of the present invention.
- FIGS. 2A to 2C illustrate a method for fabricating the circuit board structure according to an embodiment of the present invention.
- FIGS. 3A to 3C illustrate another embodiment according to the present invention.
- FIGS. 4A to 4B illustrate still another embodiment according to the present invention.
- FIGS. 5A to 5B illustrate still another embodiment according to the present invention.
- the present invention provides a novel circuit board structure, comprising a circuit board main body that could be rigid printed circuit board (rigid PCB), flexible printed circuit board (flexible PCB), rigid-flex composite printed circuit board (rigid-flex composite PCB) or rigid-flex combination printed circuit board (rigid-flex combination PCB). At least a portion of the circuit board main body is encapsulated by an injection molded three-dimensional circuit device.
- rigid PCB rigid printed circuit board
- flexible PCB flexible printed circuit board
- rigid-flex composite printed circuit board rigid-flex composite printed circuit board
- rigid-flex combination PCB rigid-flex combination printed circuit board
- FIG. 1 illustrates a cross-sectional view of a circuit board structure 1 according to an embodiment of the present invention.
- the circuit board structure 1 comprises a circuit board main body 10 , which may be a typical plate-type printed circuit board, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flexible PCB), a rigid-flex composite printed circuit board (rigid-flex composite PCB) or a rigid-flex combination printed circuit board (rigid-flex combination PCB).
- the circuit board main body 10 comprises a core layer 11 , for example, a Prepreg resin-containing material.
- a coplanar first pattern 12 is disposed on a first side 10 a of the circuit board main body 10 and a coplanar second pattern 14 is disposed on a second side 10 b of the circuit board main body 10 .
- the circuit board main body 10 may be a two-layer board, a four-layer board or a multi-layer board, which, however, should not be seen as to limit the scope of the present invention.
- FIG. 1 shows an example of a two-layer board.
- the present invention circuit board structure 1 features an injection molded three-dimensional circuit device 20 .
- the three-dimensional circuit device 20 encapsulates at least a portion of the circuit board main body 10 such as a peripheral region and the three-dimensional circuit device 20 combines with the encapsulated portion of the circuit board main body 10 tightly.
- the three-dimensional circuit device 20 further comprises an injected molded plastic body 21 which is non-plate, stereo type and usually contains a scraggy surface, on which at least a three-dimensional pattern 22 is fabricated.
- the three-dimensional pattern 22 is interconnected with a contact pad 12 a of the first pattern 12 through a conductive via 24 in the molded plastic body 21 .
- the above-mentioned injected molded plastic body 21 is made of plastic material comprising engineering plastic or ceramic.
- the engineering plastic may be selected from a group consisting of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS copolymer), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), liquid crystalline polymer (LCP), polyamide 6 (PA 6), Nylon, polyoxymethylene (POM), poly-phenylone-sulfide (PPS) and cyclic-olefin-copolymer (COC).
- PC polycarbonate
- ABS copolymer acrylonitrile-butadiene-styrene copolymer
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- LCP liquid crystalline polymer
- PA 6 polyamide 6
- Nylon polyoxymethylene
- POM polyoxymethylene
- PPS poly-phenylon
- the plastic material further comprises catalytic particles, such as copper oxide particles, aluminum nitride particles or palladium particles.
- the plastic material is mixed with catalytic particles to form a laser activable material.
- the catalytic particles described above may be a plurality of metal oxide particles or metallic complexes particles.
- the catalytic particles are selected from a group consisting of manganese, chromium, palladium, copper, aluminum and platinum.
- FIGS. 2A to 2C illustrates the method for fabricating the circuit board structure 1 according to the embodiment of the present invention.
- the circuit board main body 10 may be a typical plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB or a rigid-flex combination PCB.
- the circuit board main body 10 comprises a core layer 11 , such as a Prepreg resin-containing material.
- a coplanar first pattern 12 is formed on a first side 10 a of the circuit board main body 10 and a coplanar second pattern 14 is formed on a second side 10 b of the circuit board main body 10 .
- the circuit board main body 10 may be a two-layer board, a four-layer board or a multi-layer board, which, however, should not be seen as to limit the scope of the present invention.
- FIGS. 2A to 2C demonstrate an example of a two-layer board.
- a solder resist layer (not shown) may be provided on the first side 10 a and the second side 10 b of the circuit board main body 10 .
- the circuit board main body 10 is encapsulated with injection molded material, for example, by directly injected under low injected pressure or low molded temperature, thereby forming the molded plastic body 21 that encapsulates the circuit board main body 10 .
- the molded plastic body 21 is non-plate, stereo type and usually contains a scraggy surface. In one embodiment of the present invention, the molded plastic body 21 encapsulates at least a portion of the contact pad 12 a.
- a three-dimensional pattern 22 is formed on the molded plastic body 21 , thereby defining a three-dimensional circuit device 20 .
- LDS laser direct structuring
- MIPTEC microscopic integrated processing technology
- a conventional two-shot molding technology may be used to form the three-dimensional pattern 22 by separately injecting two different plastic materials which are activatible and non-activatible respectively, then metallizing the activatible plastic material by wet procession.
- one approach to connecting the three-dimensional pattern 22 and the contact pad 12 a involves mechanical or laser drilling and then filling with the conductive body (not shown), or directly penetrating the molded plastic body 21 by a metal conductive pillar to form a contact via.
- the conductive body described above may be formed by electroplating, chemical deposition or metal conductive material printing and padding.
- FIGS. 3A to 3C illustrate another embodiment according to the present invention.
- a circuit board main body 100 having thereon a three-dimensional pattern 102 is provided.
- the circuit board main body 100 may be a plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB or a rigid-flex combination PCB where is already formed.
- a portion or all of the circuit board main body 100 is encapsulated with the molded plastic body 121 .
- the injection molded material is used to encapsulate at least a portion or all of the circuit board main body 100 , for example, by directly injected under low injected pressure or low molded temperature, thereby forming the molded plastic body 121 that encapsulates the circuit board main body 100 .
- the molded plastic body 121 is non-plate, stereo type and has a scraggy surface. To prevent the molded plastic body 121 from contacting some sensitive elements and in consideration of the thermal expansion coefficient, the molded plastic body 121 may comprise a cavity 121 a.
- the suitable materials for the molded plastic body 121 are similar to the molded plastic body 21 as described in the embodiment mentioned above.
- a three-dimensional pattern 122 is formed on the molded plastic body 121 , defining a three-dimensional circuit device 120 , Thereafter, the three-dimensional pattern 122 is electrically connected with the three-dimensional pattern 102 .
- LDS laser direct structuring
- MIPTEC microscopic integrated processing technology
- the two-shot molding technology may be used to form the three-dimensional pattern 122 .
- one approach to connecting the three-dimensional pattern 122 and three-dimensional pattern 102 involves mechanical or laser drilling and then filling with the conductive body 124 , or directly penetrating the molded plastic body 122 by a metal conductive pillar to form a contact via.
- the conductive body 124 described above may be formed by electroplating, chemical deposition or metal conductive material printing and padding.
- FIGS. 4A and 4B illustrate another embodiment according to the present invention.
- the circuit board main body 200 may be a typical plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB, a rigid-flex combination PCB or a circuit board with a three-dimensional pattern.
- the circuit board main body 200 has a pattern 202 which includes contact pads 202 a, 202 b and 202 c.
- the three-dimensional circuit device 220 may be made by traditional injection molded technology and contains a molded plastic body 221 which is non-plate, stereo type and with a scraggy surface on which a three-dimensional pattern 222 is formed.
- the three-dimensional pattern 222 comprised contact pads 222 a, 222 b, and 222 c.
- the molded plastic body 221 further comprises a slot 221 a. Subsequently, one end of the circuit board main body 200 is inserted into the slot 221 a to make the contact pads 222 a, 222 b and 222 c in contact with the contact pads 202 a, 202 b and 202 c respectively, thereby tightly tenoning the molded plastic body and the circuit main board, as shown in FIG. 4B . While the material of the molded plastic body 221 is similar to the molded plastic body 21 in the embodiment mentioned above, it is not described herein for the sake of simplicity.
- the method for forming the three-dimensional patterns 222 on molded plastic body 221 is similar to the method for forming the three-dimensional patterns 122 on molded plastic body 121 , which is mentioned above, thus it is not described for the sake of simplicity.
- FIGS. 5A and 5B illustrate another embodiment according to the present invention.
- FIG. 5A illustrates a top view of the circuit board structure
- FIG. 5B illustrates the cross-sectional view taken along line I-I′ of FIG. 5A .
- the circuit board structure 300 comprises a substrate 302 where at least plurality of contact pads 312 , pattern 314 and pattern 316 are formed on its main surface 302 a.
- the pattern 316 may have four rows and may be arranged in matrix or, depending on different design purposes, may be arranged in single-row, 2-row or 3-row.
- the disclosure of the figures is only one example embodiment that should not be used to limit the scope of the invention.
- An injection molded three-dimensional circuit device 320 is formed on the main surface 302 a, which contains a center cavity 330 , exposing plurality of contact pads 312 .
- the three-dimensional circuit device 320 comprises an injection molded body 321 having a non-plate type, stereo structure. At least a three-dimensional pattern 322 and another three-dimensional pattern 322 a are formed on the surface of the molded main body 321 wherein the three-dimensional pattern 322 is connected to the pattern 316 encapsulated partially by the molded plastic body 321 while the three-dimensional pattern 322 a is connected to the pattern 314 encapsulated by the molded plastic body 321 through a conductive via 324 in the molded plastic body 321 .
- the edge of the molded plastic body 321 aligns with the edge of the pattern 316 , which is not shown in the figures.
- the material of the molded plastic body 321 is similar to the molded plastic body 21 in the embodiment mentioned above, therefore it is not described herein for the sake of simplicity.
- the method for forming the three-dimensional patterns 322 , 322 a on the molded plastic body 321 is similar to the method for forming the three-dimensional patterns 122 on molded plastic body 121 , which is mentioned above, thus it is not described for the sake of simplicity.
Abstract
A circuit board structure including a circuit board main body and an injection molded three-dimensional circuit device encapsulating at least a portion of the circuit board main body is provided. The three-dimensional circuit device includes a molded plastic body having a non-plate type, stereo structure, on which a three-dimensional pattern is also fabricated. The three-dimensional pattern is interconnected with a contact pad on the circuit board main body through a conductive via.
Description
- 1. Field of the Invention
- The present invention relates to a circuit board structure. In particular, the present invention relates to a circuit board having a three-dimensional circuit structure and the fabrication method thereof.
- 2. Description of the Prior Art
- As known in the art, circuit boards are essential devices in all electronic products where circuit boards are used to bear all kinds of electronic elements such as chips, resistors or capacitors. There are many layers of wires to connect these electronic elements.
- As the electronic products become smaller and thinner, in many application fields such as wireless communication, portable electronic device or automobile instrumental panel, the circuit boards are always placed in limited space in the product, or interconnected with another outer circuit boards by buses or module-connectors, such as in the automobile instrumental panels or steering wheel with electronic functions. Thus, efficiently using substrate or the surface of module shell to pattern three-dimensional circuit layout or reducing the use of buses may be more efficient to utilize the space and increase the flexibility of designing. However, on plate-type plastic or copper foil substrate, conventional circuit manufacturing technology can only form two-dimensional wire trace instead of three-dimensional pattern.
- It is one objective of the present invention to provide a novel circuit board structure and a method for manufacturing a three-dimensional circuit structure in order to solve the above-mentioned prior art problems and shortcomings.
- It is another objective of the present invention to provide a circuit board structure includes a circuit board main body and an injection molded three-dimensional circuit device encapsulating at least a portion of the circuit board main body. The three-dimensional circuit device includes a molded plastic body having a non-plate type, stereo structure, on which a three-dimensional pattern is fabricated. The three-dimensional pattern is interconnected with a contact pad on the circuit board main body through a conductive via.
- It is still another objective of the invention to provide a method for fabricating a circuit board structure. First, a circuit board main body is provided. Second, a molded plastic body is formed by encapsulating at least a portion of the circuit board main body with injection molded material. Then, a first three-dimensional pattern is formed on the molded plastic body thereby defining a three-dimensional circuit device.
- These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
-
FIG. 1 illustrates a cross-sectional view of a circuit board structure according to an embodiment of the present invention. -
FIGS. 2A to 2C illustrate a method for fabricating the circuit board structure according to an embodiment of the present invention. -
FIGS. 3A to 3C illustrate another embodiment according to the present invention. -
FIGS. 4A to 4B illustrate still another embodiment according to the present invention. -
FIGS. 5A to 5B illustrate still another embodiment according to the present invention. - The present invention provides a novel circuit board structure, comprising a circuit board main body that could be rigid printed circuit board (rigid PCB), flexible printed circuit board (flexible PCB), rigid-flex composite printed circuit board (rigid-flex composite PCB) or rigid-flex combination printed circuit board (rigid-flex combination PCB). At least a portion of the circuit board main body is encapsulated by an injection molded three-dimensional circuit device. For one of the ordinary skill in the art, it is challenging and difficult to manufacture this novel circuit board which is even applicable to a wide range of technical fields such as automobile steering wheels, cellular phones or semiconductor package.
-
FIG. 1 illustrates a cross-sectional view of acircuit board structure 1 according to an embodiment of the present invention. As shown inFIG. 1 , thecircuit board structure 1 comprises a circuit boardmain body 10, which may be a typical plate-type printed circuit board, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flexible PCB), a rigid-flex composite printed circuit board (rigid-flex composite PCB) or a rigid-flex combination printed circuit board (rigid-flex combination PCB). The circuit boardmain body 10 comprises acore layer 11, for example, a Prepreg resin-containing material. A coplanarfirst pattern 12 is disposed on afirst side 10 a of the circuit boardmain body 10 and a coplanarsecond pattern 14 is disposed on asecond side 10 b of the circuit boardmain body 10. Furthermore, the circuit boardmain body 10 may be a two-layer board, a four-layer board or a multi-layer board, which, however, should not be seen as to limit the scope of the present invention.FIG. 1 shows an example of a two-layer board. - The present invention
circuit board structure 1 features an injection molded three-dimensional circuit device 20. The three-dimensional circuit device 20 encapsulates at least a portion of the circuit boardmain body 10 such as a peripheral region and the three-dimensional circuit device 20 combines with the encapsulated portion of the circuit boardmain body 10 tightly. The three-dimensional circuit device 20 further comprises an injected molded plastic body 21 which is non-plate, stereo type and usually contains a scraggy surface, on which at least a three-dimensional pattern 22 is fabricated. The three-dimensional pattern 22 is interconnected with acontact pad 12 a of thefirst pattern 12 through a conductive via 24 in the molded plastic body 21. - According to one embodiment of the present invention, the above-mentioned injected molded plastic body 21 is made of plastic material comprising engineering plastic or ceramic. Specifically, the engineering plastic may be selected from a group consisting of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS copolymer), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), liquid crystalline polymer (LCP), polyamide 6 (PA 6), Nylon, polyoxymethylene (POM), poly-phenylone-sulfide (PPS) and cyclic-olefin-copolymer (COC).
- In addition, the plastic material further comprises catalytic particles, such as copper oxide particles, aluminum nitride particles or palladium particles. The plastic material is mixed with catalytic particles to form a laser activable material. The catalytic particles described above may be a plurality of metal oxide particles or metallic complexes particles. In one embodiment of the present invention, the catalytic particles are selected from a group consisting of manganese, chromium, palladium, copper, aluminum and platinum.
-
FIGS. 2A to 2C illustrates the method for fabricating thecircuit board structure 1 according to the embodiment of the present invention. First, as shown inFIG. 2A , a circuit boardmain body 10 is provided. The circuit boardmain body 10 may be a typical plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB or a rigid-flex combination PCB. The circuit boardmain body 10 comprises acore layer 11, such as a Prepreg resin-containing material. A coplanarfirst pattern 12 is formed on afirst side 10a of the circuit boardmain body 10 and a coplanarsecond pattern 14 is formed on asecond side 10 b of the circuit boardmain body 10. It is understood that the circuit boardmain body 10 may be a two-layer board, a four-layer board or a multi-layer board, which, however, should not be seen as to limit the scope of the present invention.FIGS. 2A to 2C demonstrate an example of a two-layer board. Furthermore, a solder resist layer (not shown) may be provided on thefirst side 10 a and thesecond side 10 b of the circuit boardmain body 10. - As shown in
FIG. 2B , at least a portion of the circuit boardmain body 10 is encapsulated with injection molded material, for example, by directly injected under low injected pressure or low molded temperature, thereby forming the molded plastic body 21 that encapsulates the circuit boardmain body 10. The molded plastic body 21 is non-plate, stereo type and usually contains a scraggy surface. In one embodiment of the present invention, the molded plastic body 21 encapsulates at least a portion of thecontact pad 12 a. - As shown in
FIG. 2C , a three-dimensional pattern 22 is formed on the molded plastic body 21, thereby defining a three-dimensional circuit device 20. For example, laser direct structuring (LDS) is used to activate the metal catalysts in the molded plastic body 21, after laser activation, the metallization of chemical copper is performed. Certainly, other technology, for example, microscopic integrated processing technology (MIPTEC), may be used to form the threedimensional pattern 22 according to the present invention. MIPITEC comprises: depositing a conductive material by chemical vapor deposition (CVD) or sputtering, then patterning the conductive material by laser and etching away the conductive material in non-metallization region, next, metallizing by chemical copper. Additionally, a conventional two-shot molding technology may be used to form the three-dimensional pattern 22 by separately injecting two different plastic materials which are activatible and non-activatible respectively, then metallizing the activatible plastic material by wet procession. As described above, one approach to connecting the three-dimensional pattern 22 and thecontact pad 12 a involves mechanical or laser drilling and then filling with the conductive body (not shown), or directly penetrating the molded plastic body 21 by a metal conductive pillar to form a contact via. The conductive body described above may be formed by electroplating, chemical deposition or metal conductive material printing and padding. -
FIGS. 3A to 3C illustrate another embodiment according to the present invention. First, as shown inFIG. 3A , a circuit boardmain body 100 having thereon a three-dimensional pattern 102 is provided. The circuit boardmain body 100 may be a plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB or a rigid-flex combination PCB where is already formed. - As shown in
FIG. 3B , a portion or all of the circuit boardmain body 100 is encapsulated with the moldedplastic body 121. The injection molded material is used to encapsulate at least a portion or all of the circuit boardmain body 100, for example, by directly injected under low injected pressure or low molded temperature, thereby forming the moldedplastic body 121 that encapsulates the circuit boardmain body 100. The moldedplastic body 121 is non-plate, stereo type and has a scraggy surface. To prevent the moldedplastic body 121 from contacting some sensitive elements and in consideration of the thermal expansion coefficient, the moldedplastic body 121 may comprise acavity 121 a. The suitable materials for the moldedplastic body 121 are similar to the molded plastic body 21 as described in the embodiment mentioned above. - As shown in
FIG. 3C , a three-dimensional pattern 122 is formed on the moldedplastic body 121, defining a three-dimensional circuit device 120, Thereafter, the three-dimensional pattern 122 is electrically connected with the three-dimensional pattern 102. For example, laser direct structuring (LDS) is used to activate the metal catalysts in the moldedplastic body 121, after laser activation, the metallization of chemical copper is performed. Other technology, for example, microscopic integrated processing technology (MIPTEC), may be used to form three-dimensional pattern 122. Additionally, in the present invention, the two-shot molding technology may be used to form the three-dimensional pattern 122. As described above, one approach to connecting the three-dimensional pattern 122 and three-dimensional pattern 102 involves mechanical or laser drilling and then filling with theconductive body 124, or directly penetrating the moldedplastic body 122 by a metal conductive pillar to form a contact via. Theconductive body 124 described above may be formed by electroplating, chemical deposition or metal conductive material printing and padding. - According to the present invention, the combination of the molded plastic and the circuit board main body is not necessary done by injection molded technology.
FIGS. 4A and 4B illustrate another embodiment according to the present invention. First, as shown inFIG. 4A , a circuit boardmain body 200 and a three-dimensional circuit device 220 are formed separately. The circuit boardmain body 200 may be a typical plate-type printed circuit board, such as a rigid PCB, a flexible PCB, a rigid-flex composite PCB, a rigid-flex combination PCB or a circuit board with a three-dimensional pattern. The circuit boardmain body 200 has apattern 202 which includescontact pads dimensional circuit device 220 may be made by traditional injection molded technology and contains a moldedplastic body 221 which is non-plate, stereo type and with a scraggy surface on which a three-dimensional pattern 222 is formed. The three-dimensional pattern 222 comprisedcontact pads - The molded
plastic body 221 further comprises aslot 221 a. Subsequently, one end of the circuit boardmain body 200 is inserted into theslot 221 a to make thecontact pads contact pads FIG. 4B . While the material of the moldedplastic body 221 is similar to the molded plastic body 21 in the embodiment mentioned above, it is not described herein for the sake of simplicity. The method for forming the three-dimensional patterns 222 on moldedplastic body 221 is similar to the method for forming the three-dimensional patterns 122 on moldedplastic body 121, which is mentioned above, thus it is not described for the sake of simplicity. -
FIGS. 5A and 5B illustrate another embodiment according to the present invention.FIG. 5A illustrates a top view of the circuit board structure andFIG. 5B illustrates the cross-sectional view taken along line I-I′ ofFIG. 5A . As shown inFIGS. 5A and 5B , thecircuit board structure 300 comprises asubstrate 302 where at least plurality ofcontact pads 312,pattern 314 andpattern 316 are formed on itsmain surface 302 a. Specifically, thepattern 316 may have four rows and may be arranged in matrix or, depending on different design purposes, may be arranged in single-row, 2-row or 3-row. Specifically, the disclosure of the figures is only one example embodiment that should not be used to limit the scope of the invention. - An injection molded three-
dimensional circuit device 320 is formed on themain surface 302 a, which contains acenter cavity 330, exposing plurality ofcontact pads 312. The three-dimensional circuit device 320 comprises an injection moldedbody 321 having a non-plate type, stereo structure. At least a three-dimensional pattern 322 and another three-dimensional pattern 322 a are formed on the surface of the moldedmain body 321 wherein the three-dimensional pattern 322 is connected to thepattern 316 encapsulated partially by the moldedplastic body 321 while the three-dimensional pattern 322 a is connected to thepattern 314 encapsulated by the moldedplastic body 321 through a conductive via 324 in the moldedplastic body 321. Besides, in another embodiment, the edge of the moldedplastic body 321 aligns with the edge of thepattern 316, which is not shown in the figures. - The material of the molded
plastic body 321 is similar to the molded plastic body 21 in the embodiment mentioned above, therefore it is not described herein for the sake of simplicity. The method for forming the three-dimensional patterns plastic body 321 is similar to the method for forming the three-dimensional patterns 122 on moldedplastic body 121, which is mentioned above, thus it is not described for the sake of simplicity. - Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.
Claims (28)
1. A circuit board structure, comprising:
a circuit board main body; and
an injection molded three-dimensional circuit device, encapsulating at least a portion of said circuit board main body, wherein said three-dimensional circuit device includes a molded plastic body having a non-plate type, stereo structure, on which a three-dimensional pattern is fabricated, said three-dimensional pattern is interconnected with a contact pad on said circuit board main body through a conductive via.
2. The circuit board structure according to claim 1 , wherein said circuit board main body includes rigid printed circuit board (rigid PCB), flexible printed circuit board (flexible PCB), rigid-flex composite printed circuit board (rigid-flex composite PCB) or rigid-flex combination printed circuit board (rigid-flex combination PCB).
3. The circuit board structure according to claim 1 , wherein said circuit board main body comprises a two-layer board or a multi-layer board.
4. The circuit board structure according to claim 1 , wherein said circuit board main body comprises a core layer.
5. The circuit board structure according to claim 1 , wherein said molded plastic body is made of plastic material comprising engineering plastic or ceramic.
6. The circuit board structure according to claim 5 , wherein said engineering plastic is selected from a group consisting of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS copolymer), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), liquid crystalline polymer (LCP), polyamide 6 (PA 6), Nylon, polyoxymethylene (POM), poly-phenylone-sulfide (PPS) and cyclic-olefin-copolymer (COC).
7. The circuit board structure according to claim 5 , wherein said engineering plastic comprises catalytic particles.
8. The circuit board structure according to claim 7 , wherein said catalytic particles comprise copper oxide particles, aluminum nitride particles or palladium particles.
9. The circuit board structure according to claim 7 , wherein said catalytic particles are selected from a group consisting of manganese, chromium, palladium, copper, aluminum and platinum.
10. The circuit board structure according to claim 1 , wherein a first side of said circuit board main body has a coplanar first pattern, a second side of said circuit board main body has a coplanar second pattern.
11. The circuit board structure according to claim 10 , wherein said first pattern is arranged in matrix and is partially covered by said molded plastic body.
12. The circuit board structure according to claim 10 , wherein an edge of said molded plastic body aligns with an edge of said first pattern.
13. The circuit board structure according to claim 1 , wherein said circuit board main body comprises a second three-dimensional pattern.
14. A method of fabricating a circuit board structure, comprising:
providing a circuit board main body;
forming a molded plastic body by encapsulating at least a portion of said circuit board main body with injection molded material; and
forming a first three-dimensional pattern on said molded plastic body thereby defining a three-dimensional circuit device.
15. The method according to claim 14 , wherein said molded plastic body is directly injected under low injected pressure or low molded temperature.
16. The method according to claim 14 , wherein said circuit board main body includes rigid printed circuit board (rigid PCB), flexible printed circuit board (flexible PCB), rigid-flex composite printed circuit board (rigid-flex composite PCB) or rigid-flex combination printed circuit board (rigid-flex combination PCB).
17. The method according to claim 14 , wherein said circuit board main body comprises a two-layer board or a multi-layer board.
18. The method according to claim 14 , wherein said circuit board main body comprises a core layer.
19. The method according to claim 14 , wherein said molded plastic body is made of plastic material comprising engineering plastic or ceramic.
20. The method according to claim 19 , wherein said engineering plastic is selected from a group consisting of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS copolymer), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), liquid crystalline polymer (LCP), polyamide 6 (PA 6), Nylon, polyoxymethylene (POM), poly-phenylone-sulfide (PPS) and cyclic-olefin-copolymer (COC).
21. The method according to claim 19 , wherein said engineering plastic comprises catalytic particles.
22. The method according to claim 21 , wherein said catalytic particles comprise copper oxide particles, aluminum nitride particles or palladium particles.
23. The method according to claim 21 , wherein said catalytic particles are selected from a group consisting of manganese, chromium, palladium, copper, aluminum and platinum.
24. The method according to claim 14 , wherein the first side of said circuit board main body has a coplanar first pattern, the second side of said circuit board main body has a coplanar second pattern.
25. The method according to claim 24 , wherein said first pattern is arranged in matrix and is partially covered by said molded plastic body.
26. The method according to claim 24 , wherein an edge of said molded plastic body aligns with an edge of said first pattern.
27. The method according to claim 14 , wherein said circuit board main body comprises a second three-dimensional pattern.
28. The method according to claim 14 , wherein said first three-dimensional pattern is formed by laser direct structuring (LDS), microscopic integrated processing technology (MIPTEC) or two-shot molding.
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Also Published As
Publication number | Publication date |
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TW201004516A (en) | 2010-01-16 |
TWI355220B (en) | 2011-12-21 |
US20120060368A1 (en) | 2012-03-15 |
US8436254B2 (en) | 2013-05-07 |
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