JP5026400B2 - 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
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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)の構成を断面図の形態で示したものである。
図7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)の構成を断面図の形態で示したものである。
図8は本発明の第3の実施形態に係る配線基板(半導体パッケージ)の構成を断面図の形態で示したものである。
上述した各実施形態では、パッケージ10(10a,10b)に電子部品(チップ)を収容するためのキャビティCVを、所要の形状にパターニングされたエッチングレジスト61(図2(c))をマスクにしてエッチングを施すことで形成した場合を例にとって説明したが、キャビティCVを形成する方法がこれに限定されないことはもちろんである。例えば、図2(b)の工程において、支持基材60上に形成すべきレジスト層を、図示のパターンとは逆のパターン(ポジとネガの関係)としためっきレジストとし、このめっきレジストを利用して所要のキャビティCVを形成することも可能である。
11,14,17,20…配線層、
12,12a,12b,15,18…樹脂層(絶縁層)、
13a,13b,16,19…ビア、
21…ソルダレジスト層(絶縁層)、
30,30a…半導体装置、
31,31a,36,41…半導体素子(チップ/電子部品)、
32,32a,34,37,42…はんだ(バンプ)、
33,33a,43…アンダーフィル樹脂、
60,60a…支持基材、
61,62…レジスト層、
CM…チップ搭載エリア、
CV…キャビティ、
DP,DP1,DP2…凹部、
P1,P2,P3,P4…パッド、
VH1,VH2,VH3,VH4…ビアホール。
Claims (7)
- 第1の面及び該第1の面と反対側の第2の面を有し、前記第1の面上で電子部品の搭載エリアに対応する箇所に形成されたキャビティを有する最外層の絶縁層と、
前記最外層の絶縁層の第2の面上に複数の配線層及び絶縁層が交互に積層された多層構造体と、
前記キャビティの底面に形成され、前記最外層の絶縁層の第1の面と同一面に露出する第1のパッドと、
前記最外層の絶縁層の第1の面上で前記キャビティの周囲の領域に形成され、前記第1の面と同一面に露出する第2のパッドと、
前記最外層の絶縁層に形成され、前記第2の面上に位置する配線層と前記第1のパッド及び第2のパッドとをそれぞれ電気的に接続する複数のビア、とを備えたことを特徴とする配線基板。 - 第1の面及び該第1の面と反対側の第2の面を有し、前記第1の面上で電子部品の搭載エリアに対応する箇所に形成されたキャビティを有する最外層の絶縁層と、
前記最外層の絶縁層の第2の面上に複数の配線層及び絶縁層が交互に積層された多層構造体と、
前記キャビティの底面に形成され、該キャビティの底面から前記最外層の絶縁層の内側に後退した位置に露出する第1のパッドと、
前記最外層の絶縁層の第1の面上で前記キャビティの周囲の領域に形成され、前記第1の面から露出する第2のパッドと、
前記最外層の絶縁層に形成され、前記第2の面上に位置する配線層と前記第1のパッド及び第2のパッドとをそれぞれ電気的に接続する複数のビア、とを備えたことを特徴とする配線基板。 - 前記第2のパッドの露出面は、前記最外層の絶縁層の第1の面と同一面にあることを特徴とする請求項2に記載の配線基板。
- 前記第2のパッドは、前記最外層の絶縁層の第1の面から基板内側に後退した位置に形成されていることを特徴とする請求項2に記載の配線基板。
- 支持基材上に、形成すべきキャビティの位置に対応する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のレジスト層をマスクにして前記支持基材を所要量だけ除去し、段差部を有した支持基材を形成する工程と、
前記第1のレジスト層を除去後、前記支持基材の段差部が形成されている側の面に、該段差部の上の部分及び下の部分に対応する箇所にそれぞれ第1の開口部及び第2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のレジスト層の第1、第2の各開口部から露出している前記支持基材上に、それぞれ第1のパッド及び第2の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、前記支持基材上に、前記第1、第2の各パッドを覆う絶縁層を形成する工程と、
前記絶縁層の上面から前記各パッドの一部を露出させる開口を形成する工程と、
前記絶縁層上に、前記各パッドにそれぞれ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。 - 前記第1のパッド及び第2のパッドを形成する工程の前に、前記第2のレジスト層から露出する第1の開口部及び第2の開口部の少なくとも一方に、犠牲導体層を形成する工程を含む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。
- 支持基材上に、形成すべきキャビティの位置に対応する箇所に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、犠牲導体層を所要の厚さに形成して、段差部を有した支持基材を形成する工程と、
前記第1のレジスト層を除去後、前記支持基材の段差部が形成されている側の面に、該段差部の上の部分の犠牲導体層上及び該段差部の下の部分に対応する箇所にそれぞれ第1の開口部及び第2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のレジスト層の第1、第2の各開口部から露出している前記犠牲導体層及び前記支持基材上に、それぞれ第1のパッド及び第2の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、前記犠牲導体層及び前記支持基材上に、前記第1、第2の各パッドを露出させて絶縁層を形成する工程と、
前記絶縁層の上面から前記各パッドの一部を露出させる開口を形成する工程と、
前記絶縁層上に、前記各パッドにそれぞれ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。
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