JP5210839B2 - 配線基板及びその製造方法 - Google Patents
配線基板及びその製造方法 Download PDFInfo
- Publication number
- JP5210839B2 JP5210839B2 JP2008314434A JP2008314434A JP5210839B2 JP 5210839 B2 JP5210839 B2 JP 5210839B2 JP 2008314434 A JP2008314434 A JP 2008314434A JP 2008314434 A JP2008314434 A JP 2008314434A JP 5210839 B2 JP5210839 B2 JP 5210839B2
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- Prior art keywords
- layer
- forming
- pad
- wiring board
- base material
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Description
図1は本発明の第1の実施形態に係る配線基板(半導体パッケージ)の構成を示したものであり、(a)はその配線基板を断面的に見たときの構成を示し、(b)はその配線基板を上面から見たときの構成を模式的に示している。
図6は本発明の第2の実施形態に係る配線基板(半導体パッケージ)の構成を示したものであり、(a)はその配線基板を断面的に見たときの構成を示し、(b)はその配線基板を上面から見たときの構成を模式的に示している。
図11は第1の実施形態の一変形例に係る配線基板(半導体パッケージ)の構成を示したものであり、(a)はその配線基板を断面的に見たときの構成を示し、(b)はその配線基板を上面から見たときの要部の構成を模式的に示している。
11,14,17,20…配線層、
11P,20P…パッド、
12,12a,15,18…樹脂層(絶縁層)、
13,16,19…ビア、
21…ソルダレジスト層、
30,30a…半導体装置、
31…半導体素子(チップ/電子部品)、
33…アンダーフィル樹脂、
40a,50a…支持基材、
40b,50b…犠牲導体層、
41,42,51,52…レジスト層、
CM…チップ搭載エリア、
DM1…(ダム形成用の)凹部、
DM2…(ダム形成用の)凸部、
GR,GR1,GR2…溝、
VH1,VH2,VH3…ビアホール。
Claims (10)
- 支持基材上に、電子部品の搭載エリアに対応する部分を囲んで環状の開口部を有するようパターン形成された第1のレジスト層を形成する工程と、
前記第1のレジスト層の開口部から露出している前記支持基材上に、犠牲導体層を形成する工程と、
前記第1のレジスト層を除去後、前記支持基材及び前記犠牲導体層上に、前記電子部品の搭載エリア内に対応する部分に所要の形状の開口部を有するようパターン形成された第2のレジスト層を形成する工程と、
前記第2のレジスト層の開口部から露出している前記支持基材上に、パッドを形成する工程と、
前記第2のレジスト層を除去後、前記支持基材及び前記犠牲導体層上に、前記パッドを露出させて絶縁層を形成する工程と、
前記絶縁層上に、前記パッドに接続されるビアを含む配線層を形成する工程と、
以降、所要の層数となるまで絶縁層と配線層を交互に積層した後、前記支持基材及び前記犠牲導体層を除去する工程とを含むことを特徴とする配線基板の製造方法。 - 前記犠牲導体層を形成する工程において、前記支持基材を構成する材料と同じ材料を用いて当該犠牲導体層を形成し、
前記パッドを形成する工程において、めっき法により、当該支持基材上に複数の金属層を順次積層してパッドを形成するに際し、その最下層の金属層を、前記支持基材及び犠牲導体層を構成する材料と異なる材料を用いて形成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。 - 支持基材上に、電子部品の搭載エリアを囲んで環状の部分のみが残存するようパターン形成された第1のレジスト層を形成する工程と、
前記第1のレジスト層から露出している前記支持基材上に、犠牲導体層を形成する工程と、
前記第1のレジスト層を除去後、前記支持基材及び前記犠牲導体層上に、前記電子部品の搭載エリア内に対応する部分に所要の形状の開口部を有するようパターン形成された第2のレジスト層を形成する工程と、
前記第2のレジスト層の開口部から露出している前記犠牲導体層上に、パッドを形成する工程と、
前記第2のレジスト層を除去後、前記支持基材及び前記犠牲導体層上に、前記パッドを露出させて絶縁層を形成する工程と、
前記絶縁層上に、前記パッドに接続されるビアを含む配線層を形成する工程と、
以降、所要の層数となるまで絶縁層と配線層を交互に積層した後、前記支持基材及び前記犠牲導体層を除去する工程とを含むことを特徴とする配線基板の製造方法。 - 前記犠牲導体層を形成する工程において、前記支持基材を構成する材料と同じ材料を用いて当該犠牲導体層を形成し、
前記パッドを形成する工程において、めっき法により、当該犠牲導体層上に複数の金属層を順次積層してパッドを形成するに際し、その最下層の金属層を、前記支持基材及び犠牲導体層を構成する材料と異なる材料を用いて形成することを特徴とする請求項3に記載の配線基板の製造方法。 - 前記第1のレジスト層を形成する工程において、さらに前記電子部品の搭載エリア内で各パッド間を分断する格子状の開口部も有するようにパターン形成された第1のレジスト層を形成し、
前記犠牲導体層を形成する工程において、前記第1のレジスト層の各開口部から露出している前記支持基材上に当該犠牲導体層を形成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。 - 支持基材上に、電子部品の搭載エリアに対応する部分を囲んで環状の凹部又は凸部を形成する工程と、
前記支持基材の前記凹部又は凸部が形成されている側の面に、前記電子部品の搭載エリア内に対応する部分に所要の形状の開口部を有するようパターン形成されたレジスト層を形成する工程と、
前記レジスト層の開口部から露出している支持基材上に、パッドを形成する工程と、
前記レジスト層を除去後、前記支持基材上に、前記パッドを露出させて絶縁層を形成する工程と、
前記絶縁層上に、前記パッドに接続されるビアを含む配線層を形成する工程と、
以降、所要の層数となるまで絶縁層と配線層を交互に積層した後、前記支持基材を除去する工程とを含むことを特徴とする配線基板の製造方法。 - 前記支持基材上に前記凹部又は凸部を形成する工程において、凸部を形成する際に、前記支持基材上の凸部形成領域を除いた部分にエッチングを施して当該部分を所要の厚さに薄くすることを特徴とする請求項6に記載の配線基板の製造方法。
- 複数の配線層が絶縁層を介在させて積層され、各絶縁層に形成されたビアを介して層間接続された構造を有した配線基板において、
電子部品を搭載する面側の最外層の絶縁層の表面と同一面に露出し、前記電子部品の搭載エリア内に配列されたパッドと、
前記最外層の絶縁層上で前記電子部品の搭載エリアを囲んで環状に形成されると共に、内底面が前記最外層の絶縁層の上面と下面との途中に形成された凹部とを有し、
前記最外層の絶縁層の表面は、前記凹部が形成されている領域を除いて平坦となっていることを特徴とする配線基板。 - 複数の配線層が絶縁層を介在させて積層され、各絶縁層に形成されたビアを介して層間接続された構造を有した配線基板において、
電子部品を搭載する面側の最外層の絶縁層の表面と同一面に露出し、前記電子部品の搭載エリア内に配列されたパッドと、
前記最外層の絶縁層上で前記電子部品の搭載エリアを囲んで環状に形成された凸部とを有し、
前記最外層の絶縁層の表面は、前記凸部が形成されている領域を除いて平坦となっており、前記凸部は前記最外層の絶縁層と一体に形成されていることを特徴とする配線基板。 - さらに、前記最外層の絶縁層の、前記電子部品の搭載エリア内に配列されている各パッド間を分断する形態で格子状に凹部が設けられていることを特徴とする請求項8に記載の配線基板。
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-
2008
- 2008-12-10 JP JP2008314434A patent/JP5210839B2/ja active Active
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