KR950007618A - 구리부착적층판 및 프린트배선판 - Google Patents
구리부착적층판 및 프린트배선판 Download PDFInfo
- Publication number
- KR950007618A KR950007618A KR1019930015101A KR930015101A KR950007618A KR 950007618 A KR950007618 A KR 950007618A KR 1019930015101 A KR1019930015101 A KR 1019930015101A KR 930015101 A KR930015101 A KR 930015101A KR 950007618 A KR950007618 A KR 950007618A
- Authority
- KR
- South Korea
- Prior art keywords
- copper
- printed wiring
- board
- copper clad
- wiring boards
- Prior art date
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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
- H05K3/384—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal by plating
-
- 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
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
-
- 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
-
- 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
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- 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
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10431—Details of mounted components
- H05K2201/10439—Position of a single component
- H05K2201/10477—Inverted
-
- 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
- H05K2203/03—Metal processing
- H05K2203/0307—Providing micro- or nanometer scale roughness on a metal surface, e.g. by plating of nodules or dendrites
-
- 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
- H05K2203/03—Metal processing
- H05K2203/0353—Making conductive layer thin, e.g. by etching
-
- 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
- H05K2203/03—Metal processing
- H05K2203/0392—Pretreatment of metal, e.g. before finish plating, etching
-
- 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
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0703—Plating
- H05K2203/0723—Electroplating, e.g. finish plating
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/901—Printed circuit
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9335—Product by special process
- Y10S428/934—Electrical process
- Y10S428/935—Electroplating
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12472—Microscopic interfacial wave or roughness
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12556—Organic component
- Y10T428/12569—Synthetic resin
-
- 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
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost 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
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2804—Next to metal
Abstract
본 발명은, 박리강도를 저하시키는 일없이, 높은 값의 에칭팩터를 얻게되고, 또한 배선패턴의 근본에 구리입자가 부착, 잔존하는 일 없고, 미세한 파인위치의 배선패턴을 가진 프린트배선판 및 이것에 사용되는 구리부착적 층판을 제공하는 것을 목적으로 한 것이며, 그 구성에 있어서, 광택면(1a)쪽에 구리전착물(2)이 형성된 전해구리박(1)을, 기판(3)의 한쪽면 또는 양면에, 그 광택면(1a)쪽에서 접착해서 이루어진 구리부착적층판 및 이 구리부착적층판을 사용한 프린트배선판인 것을 특징으로 하는 것이다.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 배선패턴의 에칭팩터에 대한 설명도.
제2도는 본 발명의 구리부착적층판의 제조공정도.
제3도는 실시예 1에 의해 얻게된 피인피치의 배선패턴의 단면도.
제4도는 비교예 2에 의해 얻게된 피인피치의 배선패턴의 단면도.
Claims (2)
- 광택면쪽에 구리전착물이 형성된 전해구리박을, 기판의 한쪽면 또는 양면에, 그 광택면쪽에서 접착해서 이루어지는 구리부착적층판.
- 특허청구 범위 제1항 기재의 구기부착적층판을 사용한 프린트배선판.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5085765A JP2762386B2 (ja) | 1993-03-19 | 1993-03-19 | 銅張り積層板およびプリント配線板 |
JP92-85765 | 1993-03-19 | ||
JP93-85765 | 1993-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950007618A true KR950007618A (ko) | 1995-03-21 |
KR0127665B1 KR0127665B1 (ko) | 1997-12-30 |
Family
ID=13867972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930015101A KR0127665B1 (ko) | 1993-03-19 | 1993-08-04 | 구리부착적층판 및 프린트배선판 |
Country Status (10)
Country | Link |
---|---|
US (1) | US5437914A (ko) |
EP (1) | EP0616489B1 (ko) |
JP (1) | JP2762386B2 (ko) |
KR (1) | KR0127665B1 (ko) |
AT (1) | ATE155311T1 (ko) |
DE (1) | DE69312049T2 (ko) |
ES (1) | ES2105046T3 (ko) |
MY (1) | MY108905A (ko) |
SG (1) | SG46186A1 (ko) |
TW (1) | TW232120B (ko) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5779870A (en) * | 1993-03-05 | 1998-07-14 | Polyclad Laminates, Inc. | Method of manufacturing laminates and printed circuit boards |
JPH08222857A (ja) * | 1995-02-16 | 1996-08-30 | Mitsui Mining & Smelting Co Ltd | 銅箔および該銅箔を内層回路用に用いた高密度多層プリント回路基板 |
US5679230A (en) * | 1995-08-21 | 1997-10-21 | Oak-Mitsui, Inc. | Copper foil for printed circuit boards |
JP3155920B2 (ja) * | 1996-01-16 | 2001-04-16 | 三井金属鉱業株式会社 | プリント配線板用電解銅箔及びその製造方法 |
US6117300A (en) * | 1996-05-01 | 2000-09-12 | Honeywell International Inc. | Method for forming conductive traces and printed circuits made thereby |
US5863666A (en) * | 1997-08-07 | 1999-01-26 | Gould Electronics Inc. | High performance flexible laminate |
JP3053440B2 (ja) * | 1996-08-23 | 2000-06-19 | グールド エレクトロニクス インコーポレイテッド | 高性能の可撓性積層体 |
WO1998010628A1 (de) * | 1996-09-05 | 1998-03-12 | Siemens Aktiengesellschaft | Trägerelement für einen halbleiterchip |
US5989727A (en) * | 1998-03-04 | 1999-11-23 | Circuit Foil U.S.A., Inc. | Electrolytic copper foil having a modified shiny side |
JP3291482B2 (ja) * | 1999-08-31 | 2002-06-10 | 三井金属鉱業株式会社 | 整面電解銅箔、その製造方法および用途 |
JP3291486B2 (ja) * | 1999-09-06 | 2002-06-10 | 三井金属鉱業株式会社 | 整面電解銅箔、その製造方法およびその用途 |
US6372113B2 (en) | 1999-09-13 | 2002-04-16 | Yates Foil Usa, Inc. | Copper foil and copper clad laminates for fabrication of multi-layer printed circuit boards and process for producing same |
US6270648B1 (en) | 1999-10-22 | 2001-08-07 | Yates Foil Usa, Inc. | Process and apparatus for the manufacture of high peel-strength copper foil useful in the manufacture of printed circuit boards, and laminates made with such foil |
JP3250994B2 (ja) * | 1999-12-28 | 2002-01-28 | 三井金属鉱業株式会社 | 電解銅箔 |
JP3628585B2 (ja) | 2000-04-05 | 2005-03-16 | 株式会社日鉱マテリアルズ | 銅張り積層板及び銅張り積層板のレーザーによる穴開け方法 |
EP1273682A4 (en) * | 2000-04-05 | 2003-04-16 | Nikko Materials Co Ltd | HOLE DRILLING BY LASER IN A COPPER T |
GB2361713B (en) * | 2000-04-14 | 2003-09-24 | Fukuda Metal Foil Powder | Method for surface treatment of copper foil |
EP1332653A1 (en) * | 2000-10-26 | 2003-08-06 | Oak-Mitsui, Inc. | Use of metallic treatment on copper foil to produce fine lines and replace oxide process in printed circuit board production |
US6763575B2 (en) * | 2001-06-11 | 2004-07-20 | Oak-Mitsui Inc. | Printed circuit boards having integrated inductor cores |
JP4062907B2 (ja) * | 2001-11-12 | 2008-03-19 | 松下電器産業株式会社 | 回路基板およびその製造方法 |
JP3898077B2 (ja) * | 2001-11-13 | 2007-03-28 | 株式会社フジクラ | フレキシブルプリント配線板の製造方法 |
DE10246094A1 (de) † | 2002-10-02 | 2004-04-22 | Siemens Ag | Stiftleiste |
TW200500199A (en) | 2003-02-12 | 2005-01-01 | Furukawa Circuit Foil | Copper foil for fine patterned printed circuits and method of production of same |
JP4226927B2 (ja) * | 2003-02-18 | 2009-02-18 | 三井金属鉱業株式会社 | キャパシタ層形成用の両面銅張積層板の製造方法 |
JP4330979B2 (ja) * | 2003-11-13 | 2009-09-16 | 福田金属箔粉工業株式会社 | 表面処理電解銅箔 |
JP3963907B2 (ja) * | 2004-05-26 | 2007-08-22 | 三井金属鉱業株式会社 | 純銅被覆銅箔及びその製造方法、並びにtabテープ及びその製造方法 |
JP2006005149A (ja) * | 2004-06-17 | 2006-01-05 | Furukawa Circuit Foil Kk | 抵抗層付き導電性基材及び抵抗層付き回路基板材料 |
JP4298597B2 (ja) * | 2004-07-01 | 2009-07-22 | 日東電工株式会社 | 配線回路基板および配線回路基板の製造方法 |
US7307022B2 (en) * | 2004-11-19 | 2007-12-11 | Endicott Interconnect Technologies, Inc. | Method of treating conductive layer for use in a circuitized substrate and method of making said substrate having said conductive layer as part thereof |
US7383629B2 (en) * | 2004-11-19 | 2008-06-10 | Endicott Interconnect Technologies, Inc. | Method of making circuitized substrates utilizing smooth-sided conductive layers as part thereof |
US6964884B1 (en) | 2004-11-19 | 2005-11-15 | Endicott Interconnect Technologies, Inc. | Circuitized substrates utilizing three smooth-sided conductive layers as part thereof, method of making same, and electrical assemblies and information handling systems utilizing same |
KR100716815B1 (ko) * | 2005-02-28 | 2007-05-09 | 삼성전기주식회사 | 칩 내장형 인쇄회로기판 및 그 제조방법 |
CN100588309C (zh) * | 2005-10-05 | 2010-02-03 | 日矿金属株式会社 | 两层挠性基板 |
TW200738913A (en) * | 2006-03-10 | 2007-10-16 | Mitsui Mining & Smelting Co | Surface treated elctrolytic copper foil and process for producing the same |
US20070246158A1 (en) * | 2006-04-21 | 2007-10-25 | 3M Innovative Properties Company | Wiring board, production process thereof and connection method using same |
JP4826569B2 (ja) * | 2007-10-05 | 2011-11-30 | 日立電線株式会社 | プリント配線板用金属板材およびその製造方法 |
JP5636224B2 (ja) * | 2010-08-06 | 2014-12-03 | 三井金属鉱業株式会社 | フィラー含有樹脂層付金属箔及びフィラー含有樹脂層付金属箔の製造方法 |
US20130284500A1 (en) * | 2012-04-25 | 2013-10-31 | Jun-Chung Hsu | Laminate circuit board structure |
CN104244586A (zh) * | 2013-07-04 | 2014-12-24 | 漳州市福世通电子有限公司 | 一种卷式ic卡线路板铜箔与基材的固化方法 |
CN112867268A (zh) * | 2021-01-05 | 2021-05-28 | 中山国昌荣电子有限公司 | 一种覆铜板减铜工艺 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US3171756A (en) * | 1961-05-04 | 1965-03-02 | Ibm | Method of making a printed circuit and base therefor |
US3771973A (en) * | 1971-05-10 | 1973-11-13 | Hooker Chemical Corp | Metal plating of synthetic polymers |
US3984598A (en) * | 1974-02-08 | 1976-10-05 | Universal Oil Products Company | Metal-clad laminates |
US4191800A (en) * | 1976-05-27 | 1980-03-04 | Bell Telephone Laboratories, Incorporated | Devices employing flexible substrates and method for making same |
GB8333752D0 (en) * | 1983-12-19 | 1984-01-25 | Thorpe J E | Matte surface on metal layer |
AU579517B2 (en) * | 1986-06-20 | 1988-11-24 | Gould Inc. | Double matte finish copper foil |
US4886699A (en) * | 1987-10-26 | 1989-12-12 | Rogers Corporation | Glass fiber reinforced fluoropolymeric circuit laminate |
US4997516A (en) * | 1989-07-10 | 1991-03-05 | Edward Adler | Method for improving adherence of copper foil to resinous substrates |
TW208110B (ko) * | 1990-06-08 | 1993-06-21 | Furukawa Circuit Foil Kk | |
JP3081026B2 (ja) * | 1991-07-18 | 2000-08-28 | 古河サーキットフォイル株式会社 | プリント配線板用電解銅箔 |
JPH0766933B2 (ja) * | 1991-09-18 | 1995-07-19 | 三井金属鉱業株式会社 | Tabテープの製造方法 |
-
1993
- 1993-03-19 JP JP5085765A patent/JP2762386B2/ja not_active Expired - Lifetime
- 1993-07-13 TW TW082105557A patent/TW232120B/zh active
- 1993-08-04 KR KR1019930015101A patent/KR0127665B1/ko not_active IP Right Cessation
- 1993-10-26 US US08/143,849 patent/US5437914A/en not_active Expired - Lifetime
- 1993-11-05 ES ES93117992T patent/ES2105046T3/es not_active Expired - Lifetime
- 1993-11-05 AT AT93117992T patent/ATE155311T1/de active
- 1993-11-05 SG SG1996000347A patent/SG46186A1/en unknown
- 1993-11-05 EP EP93117992A patent/EP0616489B1/en not_active Revoked
- 1993-11-05 DE DE69312049T patent/DE69312049T2/de not_active Revoked
- 1993-12-27 MY MYPI93002835A patent/MY108905A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPH06270331A (ja) | 1994-09-27 |
TW232120B (ko) | 1994-10-11 |
EP0616489A1 (en) | 1994-09-21 |
KR0127665B1 (ko) | 1997-12-30 |
JP2762386B2 (ja) | 1998-06-04 |
SG46186A1 (en) | 1998-02-20 |
DE69312049T2 (de) | 1998-02-26 |
EP0616489B1 (en) | 1997-07-09 |
MY108905A (en) | 1996-11-30 |
DE69312049D1 (de) | 1997-08-14 |
ES2105046T3 (es) | 1997-10-16 |
ATE155311T1 (de) | 1997-07-15 |
US5437914A (en) | 1995-08-01 |
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