KR100872131B1 - 인쇄회로기판 제조방법 - Google Patents
인쇄회로기판 제조방법 Download PDFInfo
- Publication number
- KR100872131B1 KR100872131B1 KR1020070069280A KR20070069280A KR100872131B1 KR 100872131 B1 KR100872131 B1 KR 100872131B1 KR 1020070069280 A KR1020070069280 A KR 1020070069280A KR 20070069280 A KR20070069280 A KR 20070069280A KR 100872131 B1 KR100872131 B1 KR 100872131B1
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- circuit pattern
- metal layer
- insulating layer
- conductive
- forming
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000005530 etching Methods 0.000 claims abstract description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 36
- 238000007747 plating Methods 0.000 claims description 27
- 239000000969 carrier Substances 0.000 claims description 24
- 238000003825 pressing Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000009713 electroplating Methods 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 122
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000000654 additive Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
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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
- 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
- H05K3/20—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 by affixing prefabricated conductor pattern
- H05K3/205—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 by affixing prefabricated conductor pattern using a pattern electroplated or electroformed on a metallic carrier
-
- 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
- H05K3/4647—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits by applying an insulating layer around previously made via studs
-
- 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
- H05K3/4682—Manufacture of core-less build-up multilayer circuits on a temporary carrier or on a metal foil
-
- 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
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0147—Carriers and holders
- H05K2203/0152—Temporary metallic carrier, e.g. for transferring 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0376—Etching temporary metallic carrier 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0384—Etch stop layer, i.e. a buried barrier layer for preventing etching of layers under the etch stop layer
-
- 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
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
-
- 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
- H05K3/4038—Through-connections; Vertical interconnect access [VIA] connections
- H05K3/4053—Through-connections; Vertical interconnect access [VIA] connections by thick-film techniques
- H05K3/4069—Through-connections; Vertical interconnect access [VIA] connections by thick-film techniques for via connections in organic insulating 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4614—Manufacturing multilayer circuits by laminating two or more circuit boards the electrical connections between the circuit boards being made during lamination
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- 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
- Y10T29/49121—Beam lead frame or beam lead device
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- 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.
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- 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
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- 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
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- 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
- Y10T29/49156—Manufacturing circuit on or in base with selective destruction of conductive paths
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- 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
- Y10T29/49165—Manufacturing circuit on or in base by forming conductive walled aperture in base
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
Description
Claims (12)
- 일면에 금속층이 적층된 도전성 캐리어의 상기 금속층에 제1 회로패턴을 형성하는 단계;상기 제1 회로패턴이 제1 절연층을 향하도록 상기 도전성 캐리어와 상기 제1 절연층을 압착하는 단계;상기 도전성 캐리어를 선택적으로 제거하여 비아를 형성하는 단계; 및상기 금속층을 제거하는 단계를 포함하는 인쇄회로기판 제조방법.
- 제1항에 있어서,상기 비아를 형성하는 단계는상기 비아의 위치에 상응하는 에칭레지스트를 형성하는 단계; 및상기 도전성 캐리어에 상응하는 에칭액을 상기 도전성 캐리어에 도포하여 상기 도전성 캐리어를 에칭하는 단계를 포함하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제2항에 있어서,상기 금속층을 제거하는 단계는상기 금속층에 상응하는 에칭액을 상기 금속층에 도포하여 상기 금속층을 에칭하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제3항에 있어서,상기 도전성 캐리어와 상기 금속층은 상이한 에칭액에 반응하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제1항에 있어서,상기 제1 회로패턴을 형성하는 단계는상기 금속층에 상기 제1 회로패턴에 상응하는 도금레지스트를 형성하는 단계; 및상기 금속층을 전극으로 전해 도금하는 단계를 포함하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제5항에 있어서,상기 금속층은 니켈(Ni)을 포함하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제1항에 있어서,상기 제1 회로패턴의 소정의 위치에 페이스트 범프를 형성하는 단계를 더 포함하고,상기 제1 절연층을 압착하는 단계는,상기 페이스트 범프가 돌출되도록 상기 제1 절연층을 압착하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제7항에 있어서,상기 도전성 캐리어는 한 쌍으로 이루어지며,상기 제1 절연층을 압착하는 단계는,상기 한 쌍의 도전성 캐리어 사이에 상기 제1 절연층을 개재하여 압착하는 것을 특징으로 하는 인쇄회로기판 제조방법.
- 제8항에 있어서,상기 한 쌍의 도전성 캐리어는 접착제가 도포된 이형재의 양면에 각각 접착되며,상기 제1 회로패턴을 형성하는 단계는상기 한 쌍의 도전성 캐리어의 상기 금속층에 상기 제1 회로패턴에 상응하는 도금레지스트를 형성하는 단계;상기 금속층을 전극으로 하여 전해 도금하는 단계를 포함하고,상기 제1 회로패턴을 형성하는 단계 이후에상기 한 쌍의 도전성 캐리어를 분리하는 단계를 더 포함하는 인쇄회로기판 제조방법.
- 제1항에 있어서,상기 금속층을 제거하는 단계 이후에,상기 비아가 관통되도록 제2 절연층을 압착하는 단계; 및상기 제2 절연층 상에 제2 회로패턴을 형성하는 단계를 더 포함하는 인쇄회로기판 제조방법.
- 제10항에 있어서,상기 제2 절연층은 외면에 도전층을 더 포함하고,상기 압착하는 단계는상기 비아가 상기 제2 절연층을 관통하여 상기 도전층과 전기적으로 결합되도록 압착하는 단계를 포함하며,상기 제2 회로패턴을 형성하는 단계 이후에,상기 제2 회로패턴을 가압하여 상기 제2 절연층에 압입하는 단계를 더 포함하는 인쇄회로기판 제조방법.
- 제10항에 있어서,상기 제2 회로패턴을 형성하는 단계는상기 제2 절연체 상에 상기 제2 회로패턴에 상응하는 도금 레지스트를 형성하는 단계;상기 제2 절연체를 도금하는 단계를 포함하는 것을 특징으로 하는 인쇄회로기판 제조방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070069280A KR100872131B1 (ko) | 2007-07-10 | 2007-07-10 | 인쇄회로기판 제조방법 |
US12/068,124 US7836590B2 (en) | 2007-07-10 | 2008-02-01 | Manufacturing method for printed circuit board |
JP2008067433A JP4825832B2 (ja) | 2007-07-10 | 2008-03-17 | 印刷回路基板の製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070069280A KR100872131B1 (ko) | 2007-07-10 | 2007-07-10 | 인쇄회로기판 제조방법 |
Publications (1)
Publication Number | Publication Date |
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KR100872131B1 true KR100872131B1 (ko) | 2008-12-08 |
Family
ID=40251923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020070069280A Expired - Fee Related KR100872131B1 (ko) | 2007-07-10 | 2007-07-10 | 인쇄회로기판 제조방법 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7836590B2 (ko) |
JP (1) | JP4825832B2 (ko) |
KR (1) | KR100872131B1 (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101021344B1 (ko) | 2009-10-19 | 2011-03-14 | (주)인터플렉스 | 연성인쇄회로기판의 제조방법 |
KR101088062B1 (ko) * | 2009-12-23 | 2011-11-30 | 엘지이노텍 주식회사 | 범프를 구비한 스택형 인쇄회로기판 및 제조방법 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100841987B1 (ko) * | 2007-07-10 | 2008-06-27 | 삼성전기주식회사 | 다층 인쇄회로기판 제조방법 |
TWI347807B (en) * | 2008-05-13 | 2011-08-21 | Unimicron Technology Corp | Electrically interconnect structure and process thereof and circuit board structure |
KR100990576B1 (ko) * | 2008-05-26 | 2010-10-29 | 삼성전기주식회사 | 미세 최외층 회로패턴을 갖는 인쇄회로기판 및 그 제조방법 |
KR101047139B1 (ko) * | 2009-11-11 | 2011-07-07 | 삼성전기주식회사 | 단층 보드온칩 패키지 기판 및 그 제조방법 |
Citations (3)
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KR20060043282A (ko) | 2004-07-21 | 2006-05-15 | 삼성전기주식회사 | 고밀도 기판의 제조방법 |
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KR20030071391A (ko) | 2002-02-28 | 2003-09-03 | 삼성전기주식회사 | 범프의 형성방법 및 이로부터 형성된 범프를 이용한인쇄회로기판의 제조방법 |
KR20060133544A (ko) | 2004-01-29 | 2006-12-26 | 아토테크더치랜드게엠베하 | 회로 캐리어 제조 방법 및 이 방법의 사용 |
KR20060043282A (ko) | 2004-07-21 | 2006-05-15 | 삼성전기주식회사 | 고밀도 기판의 제조방법 |
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KR101021344B1 (ko) | 2009-10-19 | 2011-03-14 | (주)인터플렉스 | 연성인쇄회로기판의 제조방법 |
KR101088062B1 (ko) * | 2009-12-23 | 2011-11-30 | 엘지이노텍 주식회사 | 범프를 구비한 스택형 인쇄회로기판 및 제조방법 |
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JP2009021545A (ja) | 2009-01-29 |
US20090013525A1 (en) | 2009-01-15 |
JP4825832B2 (ja) | 2011-11-30 |
US7836590B2 (en) | 2010-11-23 |
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