JP5877673B2 - 配線基板及びその製造方法、半導体パッケージ - Google Patents
配線基板及びその製造方法、半導体パッケージ Download PDFInfo
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Description
[第1の実施の形態に係る配線基板の構造]
まず、第1の実施の形態に係る配線基板の構造について説明する。図1は、第1の実施の形態に係る配線基板を例示する断面図である。図1を参照するに、第1の実施の形態に係る配線基板1は、大略すると、無機基板10と、接合層20と、有機基板30とを有し、無機基板10と有機基板30とが接合層20の応力緩和層21を介して接合されている。なお、図1において、絶縁層37が形成される側の面(実装基板搭載側)を一方の面、金属層15が形成される側の面(半導体チップ搭載側)を他方の面と称する場合がある。
次に、第1の実施の形態に係る配線基板の製造方法について説明する。図2〜図13は、第1の実施の形態に係る配線基板の製造工程を例示する図である。
第1の実施の形態の変形例では、第1の実施の形態とは異なる配線基板1の製造方法の例を示す。なお、第1の実施の形態の変形例において、既に説明した実施の形態と同一構成部品についての説明は省略する。
第2の実施の形態では、第1の実施の形態に係る配線基板1に半導体チップを搭載した半導体パッケージの例を示す。なお、第2の実施の形態において、既に説明した実施の形態と同一構成部品についての説明は省略する。
2 半導体パッケージ
10 無機基板
11 基板本体
11a、11b 絶縁膜
11x、31x、33x、35x ビアホール
13、31、33、35、37 絶縁層
13x、21x、37x 開口部
14 金属柱
15 金属層
20 接合層
21 応力緩和層
22 貫通配線
30 有機基板
32、34、36 配線層
40 半導体チップ
41 本体
42 電極パッド
90 支持体
Claims (9)
- 無機材料からなる基板本体に形成された配線パターンと、前記配線パターンと電気的に接続され、半導体チップが搭載される外部接続端子と、を備えた無機基板と、
絶縁層と配線層が積層された有機基板と、
熱膨張係数が前記無機基板よりも大きく前記有機基板よりも小さい材料からなる応力緩和層と、前記応力緩和層を貫通する貫通配線と、を備えた接合層と、を有し、
前記無機基板は、前記有機基板上に前記接合層を介して積層され、
前記絶縁層は、前記貫通配線の一端面及び前記応力緩和層の一方の面を覆うように形成され、
前記絶縁層を貫通するビア配線の端面は、前記貫通配線の一端面と直接接続され、
前記無機基板の配線パターンと前記有機基板の配線層とは、前記貫通配線を介して電気的に接続されている配線基板。 - 無機材料からなる基板本体に形成された配線パターンと、前記配線パターンと電気的に接続され、半導体チップが搭載される外部接続端子と、を備えた無機基板と、
絶縁層と配線層が積層された有機基板と、
弾性材料からなる応力緩和層と、前記応力緩和層を貫通する貫通配線と、を備えた接合層と、を有し、
前記無機基板は、前記有機基板上に前記接合層を介して積層され、
前記絶縁層は、前記貫通配線の一端面及び前記応力緩和層の一方の面を覆うように形成され、
前記絶縁層を貫通するビア配線の端面は、前記貫通配線の一端面と直接接続され、
前記無機基板の配線パターンと前記有機基板の配線層とは、前記貫通配線を介して電気的に接続されている配線基板。 - 前記応力緩和層のヤング率は、50〜1000MPaである請求項2記載の配線基板。
- 前記配線パターンは、前記基板本体を貫通するビアホール内に形成されたビア配線と、前記基板本体の前記接合層と接する面とは反対側の面に形成された平面配線と、を含み、
前記外部接続端子は金属柱である請求項1乃至3の何れか一項記載の配線基板。 - 請求項1乃至4の何れか一項記載の配線基板と、
前記配線基板の前記外部接続端子側に搭載された、電極パッドを有する半導体チップと、を有し、
前記電極パッドは前記外部接続端子と対向配置され、前記外部接続端子と電気的に接続されている半導体パッケージ。 - 無機材料からなる基板本体の一方の面に、応力緩和層及び前記応力緩和層を貫通する貫通配線を形成する応力緩和層形成工程と、
前記応力緩和層を介して、前記基板本体の一方の面に絶縁層と配線層を積層し、前記貫通配線と電気的に接続する有機基板を形成する有機基板形成工程と、
前記基板本体に前記貫通配線の端面を露出する貫通孔を形成する貫通孔形成工程と、
前記基板本体の他方の面に、前記貫通孔を介して前記貫通配線と電気的に接続する配線パターンを形成する配線パターン形成工程と、
前記配線パターンに外部接続端子となる金属柱を形成する金属柱形成工程と、を有し、
前記応力緩和層形成工程では、弾性材料を用いて前記応力緩和層を形成し、
前記有機基板形成工程では、前記貫通配線の一端面及び前記応力緩和層の一方の面を覆うように前記絶縁層を形成し、前記絶縁層を貫通するビア配線の端面を前記貫通配線の一端面と直接接続する配線基板の製造方法。 - 無機材料からなる基板本体の一方の面に、応力緩和層及び前記応力緩和層を貫通する貫通配線を形成する応力緩和層形成工程と、
前記応力緩和層を介して、前記基板本体の一方の面に絶縁層と配線層を積層し、前記貫通配線と電気的に接続する有機基板を形成する有機基板形成工程と、
前記基板本体に前記貫通配線の端面を露出する貫通孔を形成する貫通孔形成工程と、
前記基板本体の他方の面に、前記貫通孔を介して前記貫通配線と電気的に接続する配線パターンを形成する配線パターン形成工程と、
前記配線パターンに外部接続端子となる金属柱を形成する金属柱形成工程と、を有し、
前記応力緩和層形成工程では、熱膨張係数が前記無機材料よりも大きく前記有機基板よりも小さい材料を用いて前記応力緩和層を形成し、
前記有機基板形成工程では、前記貫通配線の一端面及び前記応力緩和層の一方の面を覆うように前記絶縁層を形成し、前記絶縁層を貫通するビア配線の端面を前記貫通配線の一端面と直接接続する配線基板の製造方法。 - 前記応力緩和層形成工程は、前記基板本体の一方の面にパターンニングされた貫通配線を形成する工程と、
前記貫通配線を覆うように前記基板本体の一方の面に応力緩和層を形成する工程と、
前記応力緩和層を研磨して前記貫通配線の端部を露出させる工程と、を含む請求項6又は7記載の配線基板の製造方法。 - 前記応力緩和層形成工程は、前記基板本体の一方の面の全面に応力緩和層を形成する工程と、
前記応力緩和層に前記基板本体の一方の面の一部を露出する貫通孔を形成する工程と、
前記貫通孔を充填する貫通配線を形成する工程と、を含む請求項6又は7記載の配線基板の製造方法。
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