JP5795225B2 - 配線基板の製造方法 - Google Patents
配線基板の製造方法 Download PDFInfo
- Publication number
- JP5795225B2 JP5795225B2 JP2011210212A JP2011210212A JP5795225B2 JP 5795225 B2 JP5795225 B2 JP 5795225B2 JP 2011210212 A JP2011210212 A JP 2011210212A JP 2011210212 A JP2011210212 A JP 2011210212A JP 5795225 B2 JP5795225 B2 JP 5795225B2
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- Japan
- Prior art keywords
- layer
- support plate
- metal layer
- wiring board
- connection pad
- 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.)
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- 229910052802 copper Inorganic materials 0.000 claims description 71
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- 239000004332 silver Substances 0.000 claims description 16
- 238000007747 plating Methods 0.000 claims description 15
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 14
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- 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
- H05K3/188—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 direct electroplating
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- H05K1/113—Via provided in pad; Pad over filled via
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- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
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- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
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- 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
- H05K2201/0364—Conductor shape
- H05K2201/0376—Flush conductors, i.e. flush with the surface of the 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09036—Recesses or grooves in 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0369—Etching selective parts of a metal substrate through part of its thickness, e.g. using etch resist
-
- 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
- H05K2203/06—Lamination
-
- 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
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Description
図1〜図2は第1実施形態の配線基板の製造方法を示す断面図、図3は第1実施形態の配線基板を示す図である。
接続パッドPのバリア金属層としてニッケル層20aを例示するが、金(Au)、パラジウム(Pd)、ニッケル(Ni)、銅(Cu)、及び銀(Ag)の群から選択される1つの金属層、又は2つ以上の積層金属膜からバリア金属層を形成してもよい。
図7及び図8は第2実施形態の配線基板の製造方法を示す断面図、図9及び図10は第2実施形態の配線基板を示す断面図である。第2実施形態では、第1実施形態と同一工程及び同一要素についてはその詳しい説明を省略する。
図11及び図12は第3実施形態の配線基板の製造方法を示す断面図、図13及び図14は第3実施形態の配線基板を示す断面図である。第3実施形態では、第1実施形態と同一工程及び同一要素についてはその詳しい説明を省略する。
Claims (13)
- 支持板の上に、開口部が設けられたレジストを形成する工程と、
前記レジストの開口部を通して前記支持板に凹部を形成する工程と、
前記支持板をめっき給電経路に利用する電解めっきにより、前記支持板の凹部及び前記レジストの開口部に接続パッド用の金属層を形成する工程と、
前記レジストを除去する工程と、
前記金属層及び前記支持板をエッチングすることにより、前記金属層の外側周辺部の前記支持板のリング状部分を他のエッチング面より高さが高い凸状段差部とする工程と、
前記支持板の上に、前記金属層を被覆する絶縁層を形成する工程と、
前記支持板を除去することにより、前記金属層を露出させる工程とを有することを特徴とする配線基板の製造方法。 - 支持板の上に、開口部が設けられたレジストを形成する工程と、
前記支持板をめっき給電経路に利用する電解めっきにより、前記レジストの開口部の前記支持板の上に、犠牲金属層及び接続パッド用の金属層を順に形成して積層金属層を得る工程と、
前記レジストを除去する工程と、
前記積層金属層及び前記支持板をエッチングすることにより、前記積層金属層の外側周辺部の前記支持板のリング状部分を他のエッチング面より高さが高い凸状段差部とする工程と、
前記支持板の上に、前記積層金属層を被覆する絶縁層を形成する工程と、
前記支持板及び前記犠牲金属層を除去することにより、前記接続パッド用の金属層を露出させる工程とを有することを特徴とする配線基板の製造方法。 - 前記レジストを除去する工程の後であって、前記支持板を除去する工程の前に、
前記支持板の上に、前記接続パッドに接続されるn層(nは1以上の整数)の配線層を形成する工程をさらに有することを特徴とする請求項1又は2に記載の配線基板の製造方法。 - 前記支持板は銅からなり、
前記接続パッド用の金属層は、下から順にバリア金属層と銅層とを含み、
前記支持板を除去する工程において、前記支持板を前記バリア金属層に対して選択的に除去することを特徴とする請求項1に記載の配線基板の製造方法。 - 前記支持板及び前記犠牲金属層は銅から形成され、
前記接続パッド用の金属層は、下から順に、バリア金属層と銅層とを含み、
前記支持板及び前記犠牲金属層を除去する工程において、前記支持板及び前記犠牲金属層を前記バリア金属層に対して選択的に除去することを特徴とする請求項2に記載の配線基板の製造方法。 - 前記支持板を除去する工程の後に、前記バリア金属層を前記銅層に対して選択的に除去する工程を有することを特徴とする請求項4に記載の配線基板の製造方法。
- 前記支持板及び前記犠牲金属層を除去する工程の後に、前記バリア金属層を前記銅層に対して選択的に除去する工程を有することを特徴とする請求項5に記載の配線基板の製造方法。
- 前記バリア金属層は、金層の単層膜、銀層の単層膜、パラジウムの単層膜、ニッケル層の単層膜、下から順に、金層/ニッケル層の積層膜、金層/パラジウム層/ニッケル層の積層膜、金層/銀層/パラジウム層/ニッケル層の積層膜、銀層/ニッケル層の積層膜、及び銀層/パラジウム層/ニッケル層の積層膜のいずれかから形成されることを特徴とする請求項4乃至6のいずれか一項に記載の配線基板の製造方法。
- 前記支持板に凹部を形成する工程において、
前記支持体の凹部のサイズは、前記レジストの開口部のサイズよりも大きく形成されることを特徴とする請求項1に記載の配線基板の製造方法。 - 前記接続パッド用の金属層を形成する工程において、
前記支持体の凹部内にバリア金属層が形成され、前記レジストの開口部内に銅層が形成されることを特徴とする請求項1に記載の配線基板の製造方法。 - 前記接続パッド用の金属層を形成する工程において、
前記支持体の凹部の深さの途中までバリア金属層が形成され、前記支持体の凹部の残りの空間から前記レジストの開口部内に銅層が形成されることを特徴とする請求項1に記載の配線基板の製造方法。 - 前記金属層及び前記支持板をエッチングする工程は、
粗化処理液により、前記支持体表面及び前記金属層の各表面を粗化面にすることを含むことを特徴とする請求項1に記載の配線基板の製造方法。 - 前記積層金属層及び前記支持板をエッチングする工程は、
粗化処理液により、前記支持体及び前記積層金属層の各表面を粗化面にすることを含むことを特徴とする請求項2に記載の配線基板の製造方法。
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