EP2345314A1 - Flexible leiterplatte - Google Patents
Flexible leiterplatteInfo
- Publication number
- EP2345314A1 EP2345314A1 EP09744937A EP09744937A EP2345314A1 EP 2345314 A1 EP2345314 A1 EP 2345314A1 EP 09744937 A EP09744937 A EP 09744937A EP 09744937 A EP09744937 A EP 09744937A EP 2345314 A1 EP2345314 A1 EP 2345314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printed circuit
- circuit board
- flexible printed
- carrier film
- board according
- 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
Classifications
-
- 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
- H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
-
- 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
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0388—Other aspects of conductors
- H05K2201/0394—Conductor crossing over a hole in the substrate or a gap between two separate substrate parts
-
- 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
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2009—Reinforced areas, e.g. for a specific part of a flexible 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/049—Wire bonding
-
- 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
- H05K3/0058—Laminating printed circuit boards onto other substrates, e.g. metallic substrates
-
- 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
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/281—Applying non-metallic protective coatings by means of a preformed insulating foil
-
- 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.]
- Y10T428/24777—Edge feature
-
- 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
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31511—Of epoxy ether
- Y10T428/31515—As intermediate layer
Definitions
- the invention relates to a flexible printed circuit board, in particular for the spatial connection of electronic components.
- Printed circuit boards are known as carriers made of insulating material with firmly adhering conductive connections, wherein a printed circuit board of the mechanical attachment and the electrical connection of electronic components is used. Furthermore, it is known that the freedom of design of printed circuit boards can be increased by the use of a flexible substrate. So-called flexible circuit boards can be arranged to save space by folding in an available limited space.
- bonding surfaces and solder pads are arranged to make connections to electronic components.
- the bonding surfaces and the solder pads are mounted in a complex manufacturing process on an upper surface of a flexible printed circuit board.
- a flexible printed circuit board with double-sided contacting and high reliability is achieved by a double-layered construction of two single-sided contactable flexible printed circuit boards, which are glued to each other at a non-contactable surface.
- Such a flexible printed circuit board is expensive since two single-sided contactable flexible printed circuit boards are used for their production.
- a carrier film according to claim 2 ensures protection of an electrically conductive layer by cover layers attached thereto on both sides.
- a design of a cover layer according to claim 3 enables a good bonding of the cover layer to an electrically conductive layer and, on the other hand, guarantees sufficient protection of the electrically conductive layer.
- a protective layer according to claim 4 is inexpensive to produce.
- An electrically conductive layer according to claim 5 is characterized by a high electrical conductivity.
- a flexible printed circuit board according to claim 6 enables improved design freedom in the arrangement of the flexible printed circuit board.
- a flexible printed circuit board according to claim 7 enables the connection of electrical contacts which are not arranged flat to each other.
- a removal of the cover layers according to claim 8 serves for the connection of a contacting layer with an electrically conductive layer.
- a contacting layer according to claim 9 is insensitive to thermal stress and is resistant to moisture.
- a flexible circuit board according to claim 10 facilitates bonding of electronic components to a flexible circuit board by soldering.
- a property control of a flexible printed circuit board is possible by the arrangement of test surfaces according to claim 11.
- a flexible printed circuit board according to claim 12 is constructed symmetrically with respect to their contact surfaces.
- Fig. 1 and 2 are perspective views of a flexible circuit board
- Fig. 3 is a schematic representation of a layer structure of a flexible printed circuit board, which is contactable on both sides.
- Fig. 1 shows a flexible printed circuit board with a carrier film 1, a plurality of solder pads 2 and a stiffening plate 3, which is permanently connected to the carrier film 1.
- the soldering surfaces 2 and the stiffening plate 3 are arranged on a soldering side 4 of the carrier film 1.
- the carrier film 1 is perforated in sections, wherein a hole surface 5 and a soldering surface 2 are arranged concentrically to each other and wherein the Lötfiambae 2 is greater than the hole surface 5.
- the soldering surface 2 and the concentrically arranged hole surface 5 form an annular solder contact surface 6, the a contacting layer 7 has.
- the contacting layer 7 of a soldering contact surface 6 is connected to an electrically conductive layer 8 of the carrier film 1 in order to produce an electrically conductive connection.
- the carrier film 1 has a substantially rectangular shape.
- the soldering surfaces 2 are arranged along a soldering surface edge 9 of the carrier film 1, wherein a distance of the soldering surfaces 2 from the soldering surface edge 9 is as large as the diameter d of the circular soldering surfaces 2.
- Rectangular bonding surfaces 10 are along one of the soldering surface edges 9 opposite bonding surface edge 11 is arranged.
- the bonding surfaces 10 are relative to the arranged on the opposite surface of the carrier film 1 Aus ⁇ stiffening plate 3 arranged centrally.
- the bonding surfaces 10 are connected via electrical conductor tracks with the solder pads 2.
- a bonding side 12 of the carrier film 1 shown in FIG. 2 is opposite the soldering side 4.
- Bonding surfaces 10 and test surfaces 13 are arranged on the bonding side 12 of the carrier film 1.
- the bonding surfaces 10 are used for contacting a bonding wire on the flexible printed circuit board, wherein the bonding surfaces 10 opposite stiffening plate 3 ensures sufficient stability due to mechanical effects of a bonding process.
- the test surfaces 13 serve to control the properties of the flexible printed circuit board, wherein a test surface 13 is a bonding surface 10 which is not connected to a soldering surface 2.
- the bonding surfaces 10 and the test surfaces 13 each have a contacting layer 7. This applies both to a contacting layer 7 on a soldering surface 2 and to a contacting layer 7 on a bonding surface 10.
- a carrier film 1 shown in Fig. 3 is inextricably connected to a stiffening plate 3 by an adhesive layer 14.
- the carrier film 1 has a centrally arranged electrically conductive layer 8 and an upper cover layer 15 and a lower cover layer 16.
- Both cover layers 15, 16 each comprise an adhesive layer 14 and a protective layer 17, wherein the cover layers 15, 16 are each connected to the electrically conductive layer 8 via the adhesive layer 14.
- the upper cover layer 15 for the production of solder pads 2 on a Lötseite 4 and a lower cover layer 16 for the production of bonding pads 10 on a bonding side 12 are removed.
- a contacting layer 7 can be arranged directly on the electrically conductive layer 8, so that there is electrical contact between the contacting layer 7 and the electrically conductive layer 8.
- the contacting layer 7 is present preferably made of a nickel-gold compound, wherein the layer thickness of the KunststofftechniksscMcht 7 is less than 20 microns, in particular less than 10 microns and in particular less than 5 microns.
- the electrically conductive layer 8 is a copper foil and has a layer thickness of 50 to 200 .mu.m, in particular from 70 to 100 .mu.m.
- polyimide is used with a layer thickness of less than 100 .mu.m, in particular less than 50 .mu.m and in particular less than 25 microns.
- the adhesive layer 14 used is an acrylic-based adhesive, for example Pyralux®, having layer thicknesses of less than 100 ⁇ m, in particular less than 50 ⁇ m and in particular less than 25 ⁇ m.
- the stiffening plate 3 is made of aluminum or one of its alloys. The thickness of the stiffening plate 3 is between 1 and 4 mm, in particular between 2 and 3 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structure Of Printed Boards (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
- Combinations Of Printed Boards (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810052244 DE102008052244A1 (de) | 2008-10-18 | 2008-10-18 | Flexible Leiterplatte |
PCT/DE2009/001409 WO2010043203A1 (de) | 2008-10-18 | 2009-10-09 | Flexible leiterplatte |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2345314A1 true EP2345314A1 (de) | 2011-07-20 |
Family
ID=41403905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09744937A Ceased EP2345314A1 (de) | 2008-10-18 | 2009-10-09 | Flexible leiterplatte |
Country Status (5)
Country | Link |
---|---|
US (1) | US8853547B2 (de) |
EP (1) | EP2345314A1 (de) |
JP (1) | JP5489013B2 (de) |
DE (2) | DE102008052244A1 (de) |
WO (1) | WO2010043203A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008052243A1 (de) | 2008-10-18 | 2010-04-22 | Carl Freudenberg Kg | Schutzabdeckung für eine flexible Leiterplatte |
US20170290145A1 (en) * | 2014-08-29 | 2017-10-05 | Tatsuta Electric Wire & Cable Co., Ltd. | Reinforcing member for flexible printed wiring board, and flexible printed wiring board provided with same |
KR102637499B1 (ko) * | 2018-12-17 | 2024-02-15 | 엘지디스플레이 주식회사 | 플렉서블 인쇄 회로 기판과 이를 포함하는 플렉서블 디스플레이 모듈 및 전자 기기 |
CN113597090B (zh) * | 2021-07-28 | 2024-03-26 | 京东方科技集团股份有限公司 | 柔性电路板、显示面板及显示装置 |
DE102022213615A1 (de) | 2022-12-14 | 2024-06-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Zugentlastung für eine Kontaktierung einer flexiblen Leiterfolie mit einer starren Leiterplatte sowie Verfahren zur Herstellung einer derartigen Zugentlastung |
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2008
- 2008-10-18 DE DE200810052244 patent/DE102008052244A1/de not_active Withdrawn
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2009
- 2009-10-09 JP JP2011533529A patent/JP5489013B2/ja active Active
- 2009-10-09 WO PCT/DE2009/001409 patent/WO2010043203A1/de active Application Filing
- 2009-10-09 DE DE112009002460.2T patent/DE112009002460B4/de active Active
- 2009-10-09 EP EP09744937A patent/EP2345314A1/de not_active Ceased
- 2009-10-09 US US13/124,699 patent/US8853547B2/en active Active
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Title |
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See also references of WO2010043203A1 * |
Also Published As
Publication number | Publication date |
---|---|
US8853547B2 (en) | 2014-10-07 |
DE112009002460A5 (de) | 2011-07-14 |
WO2010043203A1 (de) | 2010-04-22 |
JP5489013B2 (ja) | 2014-05-14 |
DE102008052244A1 (de) | 2010-04-22 |
US20110232946A1 (en) | 2011-09-29 |
JP2012506161A (ja) | 2012-03-08 |
DE112009002460B4 (de) | 2022-01-20 |
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