JP6196893B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP6196893B2 JP6196893B2 JP2013244138A JP2013244138A JP6196893B2 JP 6196893 B2 JP6196893 B2 JP 6196893B2 JP 2013244138 A JP2013244138 A JP 2013244138A JP 2013244138 A JP2013244138 A JP 2013244138A JP 6196893 B2 JP6196893 B2 JP 6196893B2
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Description
以下、第1実施形態を図1〜図8に従って説明する。
本実施形態の半導体装置の製造方法では、まず、図1に示すような配線基板20を用意する。配線基板20は、多面取り用基板であり、半導体装置に対応する構造体が形成される領域R1を複数有している。この配線基板20は、領域R1に半導体装置に対応する構造体が形成された後、切断線C1に沿ってダイシングブレード等によって切断される。これにより、半導体装置に対応する構造体が個片化され、複数の半導体装置が製造されることになる。配線基板20の各領域R1には、半導体チップをフリップチップ実装するための複数のチップ実装領域Aが画定されている。
また、基板本体21の上面には、配線パターン22を露出させる開口部24Xを有するソルダレジスト層24が形成されている。図1(a)に示すように、ソルダレジスト層24の開口部24Xは、リング状に繋がって形成されている。このリング状の開口部24X内に複数の配線パターン22がペリフェラル状に並んで配置されている。このため、配線パターン22の上面は接続パッドP1として開口部24Xから露出されている。なお、必要に応じて、開口部24Xから露出された配線パターン22の表面に、はんだ層や金属層を形成するようにしてもよい。金属層の例としては、金(Au)層や、ニッケル(Ni)/Au層(配線パターン22上にNi層とAu層をこの順番で積層した金属層)や、Ni/パラジウム(Pd)/Au層(Ni層とPd層とAu層をこの順番で積層した金属層)などを挙げることができる。
本工程により、封止用樹脂材40がマスキングテープ30上に配置されると、封止用樹脂材40の下側に、封止用樹脂材40とマスキングテープ30とソルダレジスト層24と基板本体21とによって囲まれた空洞部Bが形成された状態となる。
以上説明したように、本実施形態によれば、以下の効果を奏することができる。
以下、第2実施形態を図9〜図11に従って説明する。以下、第1実施形態との相違点を中心に説明する。
(他の実施形態)
なお、上記実施形態は、これを適宜変更した以下の態様にて実施することもできる。
・上記各実施形態では、配線基板20上に未硬化の封止樹脂43,83を形成する前に、基板本体21の上面を粗面化するようにしたが、この粗面化処理を省略してもよい。
21 基板本体
22 配線パターン
24 ソルダレジスト層
30 マスキングテープ(マスク材)
30X 開口部
40,80 封止用樹脂材
41,81 樹脂フィルム
42,82 支持フィルム
43,83 封止樹脂
44,84 盛り上がり部
44A,84A 盛り上がり部
50 半導体チップ
51 接続バンプ
60 半導体装置
P1 接続パッド
Claims (8)
- チップ実装領域を有する配線基板の上に、前記チップ実装領域の上に開口部が配置されたマスク材を形成する工程と、
前記配線基板上のうち少なくとも前記チップ実装領域に、未硬化の封止樹脂を形成するとともに、前記未硬化の封止樹脂上に支持フィルムを形成する工程と、
前記未硬化の封止樹脂から前記支持フィルムを剥離する工程と、
前記配線基板から前記マスク材を剥離することにより、前記チップ実装領域に前記未硬化の封止樹脂を残す工程と、を有し、
前記チップ実装領域内の前記未硬化の封止樹脂に半導体チップがフリップチップ実装され、
前記支持フィルムを剥離する工程は、室温で実施され、
前記マスク材を剥離する工程は、前記封止樹脂が軟化するまで前記配線基板を加熱した状態で実施されることを特徴とする半導体装置の製造方法。 - 前記チップ実装領域に前記未硬化の封止樹脂を残す工程の後に、
前記未硬化の封止樹脂の周縁部の厚さが、該周縁部よりも内側に形成された前記未硬化の封止樹脂の厚さと同じ厚さに、又は前記周縁部よりも内側に形成された前記未硬化の封止樹脂よりも薄くなるように、前記未硬化の封止樹脂を加工する工程を有することを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記未硬化の封止樹脂を加工する工程は、
前記未硬化の封止樹脂をプレス成型することにより、前記未硬化の封止樹脂を、周縁部から中央部に向かうに連れて上方に盛り上がった構造に加工することを特徴とする請求項2に記載の半導体装置の製造方法。 - 前記未硬化の封止樹脂を加工する工程は、
前記未硬化の封止樹脂を、真空雰囲気下でダイアフラムを用いて加熱及び加圧することにより実施されることを特徴とする請求項2又は3に記載の半導体装置の製造方法。 - 前記マスク材を形成する工程の前に、
前記配線基板の表面のうち少なくとも前記未硬化の封止樹脂が接着される表面を粗面化する工程を有することを特徴とする請求項1〜4のいずれか1項に記載の半導体装置の製造方法。 - 前記マスク材を前記配線基板から剥離する工程では、
前記マスク材上に延在して設けられた前記未硬化の封止樹脂が引き裂かれて除去されることを特徴とする請求項1〜5のいずれか1項に記載の半導体装置の製造方法。 - 前記マスク材を前記配線基板から剥離する工程の後に、
前記半導体チップの接続バンプを前記未硬化の封止樹脂に押し込むことにより、前記半導体チップを前記配線基板にフリップチップ実装するとともに、前記半導体チップの下側に前記未硬化の封止樹脂を充填する工程と、
前記未硬化の封止樹脂を熱処理により硬化させる工程と、
を有することを特徴とする請求項1〜6のいずれか1項に記載の半導体装置の製造方法。 - 前記未硬化の封止樹脂及び前記支持フィルムを形成する工程は、
前記未硬化の封止樹脂となる樹脂フィルムと前記樹脂フィルム上に形成された前記支持フィルムとを有する封止用樹脂材を準備する工程と、
前記配線基板上に、前記樹脂フィルムを前記配線基板側に向けた状態で前記封止用樹脂材を、複数の前記チップ実装領域を連続して被覆するように形成する工程と、
前記封止用樹脂材を前記配線基板に熱圧着することにより、複数の前記チップ実装領域を連続して被覆する前記未硬化の封止樹脂を形成する工程と、を有し、
前記マスク材を前記配線基板から剥離する工程では、
前記マスク材上に形成された前記未硬化の封止樹脂が引き裂かれて除去されることを特徴とする請求項1〜7のいずれか1項に記載の半導体装置の製造方法。
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