JP2011040606A - 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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- JP2011040606A JP2011040606A JP2009187281A JP2009187281A JP2011040606A JP 2011040606 A JP2011040606 A JP 2011040606A JP 2009187281 A JP2009187281 A JP 2009187281A JP 2009187281 A JP2009187281 A JP 2009187281A JP 2011040606 A JP2011040606 A JP 2011040606A
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- solder
- wiring board
- semiconductor device
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- semiconductor chip
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- H—ELECTRICITY
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Abstract
【解決手段】フリップチップ接続タイプのBGAの組立てにおいて、半導体チップ1をフリップチップ接続によって半田接続する時に、配線基板2の下面2b側のランド2jの表面に半田プリコート3が形成されていることにより、ランド2jと外部端子である半田ボールとの接続が半田接続となるため、ランド2jと前記半田ボールとの接続部の耐衝撃性を高めることができ、前記BGAの信頼性の向上を図る。
【選択図】図8
Description
図1は本発明の実施の形態の半導体装置の構造の一例を一部破断して示す斜視図、図2は図1に示す半導体装置の構造の一例を示す断面図、図3は図1に示す半導体装置の組み立て手順の一例を示す製造フロー図である。また、図4は図1に示す半導体装置の組み立てで用いられる配線基板の構造の一例を示す断面図、図5は図4のA部の構造の一例を拡大して示す部分拡大断面図、図6は図1に示す半導体装置の組み立てで用いられる配線基板の半田プリコートの形成方法の一例を示す部分断面図、図7は図6に示す半田プリコートの形成方法の詳細の一例を示す部分断面図である。さらに、図8は図1に示す半導体装置の組み立てにおけるフリップチップ接続の手順の一例を示す部分断面図、図9は図1に示す半導体装置の組み立てにおけるボールマウントの手順の一例を示す部分断面図である。また、図10は図1に示す半導体装置の組み立てで用いられる配線基板の第1変形例の半田プリコートの形成方法を示す部分断面図、図11は図1に示す半導体装置の組み立てで用いられる配線基板の第2変形例の半田プリコートの形成方法を示す部分断面図、図12は図1に示す半導体装置の組み立てにおける第3変形例のフリップチップ接続の手順を示す部分断面図である。
1a 主面
1b 裏面
1c 電極パッド
1d 半田バンプ
1e フラックス
2 配線基板
2a 上面
2b 下面
2c フリップチップ用電極
2d スルーホール配線
2e 内部配線
2f ビルドアップ層
2g ソルダレジスト膜(絶縁膜)
2h コア層
2i ビアホール
2j ランド
2k 穴埋め樹脂
2m 半田バンプ
2n 半田ペースト
2p 半田ボール
2q 半田バンプ
3 半田プリコート
3a 半田ペースト
4 ヒートスプレッダ
5 半田ボール(外部端子)
5a 半田ペースト
6 アンダーフィル樹脂
7 スティフナリング
7a リング状テープ
7b 接着材
8 半田バンプ
9 BGA(半導体装置)
10 半田印刷マスク
10a 開口部
11 チップ側ヘッド(第1ヘッド部材)
12 基板側ヘッド(第2ヘッド部材)
13 放熱樹脂
Claims (13)
- 上面とその反対側の下面を有する配線基板の前記上面側に半導体チップがフェイスダウンで半田接続され、前記配線基板の前記下面側に実装基板と接続し得る半田ボールを有する半導体装置の製造方法であって、
(a)前記配線基板の前記上面に前記半導体チップをフェイスダウンで前記半田接続する工程を有し、
前記半導体チップを前記半田接続する時に、前記半田ボールを接続する前記配線基板の前記下面側の銅を主成分とするランドの表面に半田プリコートが形成されていることを特徴とする半導体装置の製造方法。 - 請求項1記載の半導体装置の製造方法において、前記半田プリコートは、鉛フリー半田であることを特徴とする半導体装置の製造方法。
- 請求項2記載の半導体装置の製造方法において、前記鉛フリー半田は、Sn−Cu系またはSn−Ag−Cu系の半田であることを特徴とする半導体装置の製造方法。
- 請求項3記載の半導体装置の製造方法において、前記(a)工程の後、前記半田プリコートに熱を付与して前記半田ボールを前記配線基板の前記ランドに電気的に接続することを特徴とする半導体装置の製造方法。
- 請求項1記載の半導体装置の製造方法において、前記(a)工程の前に、
前記配線基板の前記下面側の複数の前記ランドに前記半田プリコートを形成する工程を有し、
前記半田プリコートは、その厚さ方向において、前記半田プリコートが接続される前記ランドの周縁部を覆う絶縁膜より引っ込んでいることを特徴とする半導体装置の製造方法。 - 請求項5記載の半導体装置の製造方法において、前記(a)工程では、前記半導体チップを前記配線基板に前記半田接続する際に、前記半導体チップの裏面を第1ヘッド部材で加熱し、さらに前記配線基板の前記下面を第2ヘッド部材で加熱し、
前記第1ヘッド部材による前記半導体チップの加熱の方が、前記第2ヘッド部材による前記配線基板の加熱より温度が高いことを特徴とする半導体装置の製造方法。 - 請求項6記載の半導体装置の製造方法において、前記(a)工程で前記半導体チップを前記配線基板に前記半田接続する際に、前記第1ヘッド部材によって前記半導体チップを真空吸着した状態で前記半導体チップを加熱し、さらに前記第2ヘッド部材によって前記配線基板を真空吸着した状態で前記配線基板を加熱することを特徴とする半導体装置の製造方法。
- 請求項7記載の半導体装置の製造方法において、前記(a)工程で前記半導体チップを前記配線基板に前記半田接続する際に、前記半導体チップの主面にはSn−Ag−Cuから成る複数の半田バンプが設けられていることを特徴とする半導体装置の製造方法。
- 請求項1記載の半導体装置の製造方法において、前記(a)工程では、前記半導体チップを前記配線基板に前記半田接続する際に、前記配線基板の前記上面側の複数のフリップチップ用電極に半田ボールを配置し、前記配置後、前記半田ボールをリフローで溶融することを特徴とする半導体装置の製造方法。
- 請求項9記載の半導体装置の製造方法において、前記(a)工程では、前記半導体チップを前記配線基板に前記半田接続する際に、前記配線基板の前記下面側の複数の前記ランドに半田ペーストを塗布し、前記塗布後、前記リフローによって前記半田バンプと前記半田ペーストとを溶融することを特徴とする半導体装置の製造方法。
- 請求項9記載の半導体装置の製造方法において、前記(a)工程では、前記半導体チップを前記配線基板に前記半田接続する際に、前記配線基板の前記下面側の複数の前記ランドに半田プリコート用半田ボールを配置し、前記配置後、前記リフローによって前記半田ボールと前記半田プリコート用半田ボールとを溶融して、前記複数のランドの表面に前記半田プリコートを形成することを特徴とする半導体装置の製造方法。
- 上面とその反対側の下面を有する配線基板の前記上面側に半導体チップがフェイスダウンで半田接続され、前記配線基板の前記下面側に実装基板と接続し得る半田ボールを有する半導体装置の製造方法であって、
(a)前記配線基板の前記上面側の複数のフリップチップ用電極に半田ボールを配置し、さらに前記配線基板の前記下面側の複数のランドに半田ペーストを塗布する工程と、
(b)前記(a)工程の後、リフローによって前記上面側の前記半田ボールと前記下面側の前記半田ペーストとを溶融して、前記複数のランドの表面に半田プリコートを形成する工程と、
(c)前記半導体チップの主面と前記配線基板の前記上面とを対向させて配置する工程と、
(d)前記(c)工程の後、前記配線基板の前記下面側の前記複数のランドの表面に前記半田プリコートが形成された状態で、前記半導体チップの裏面を第1ヘッド部材で加熱し、さらに前記配線基板の前記下面を第2ヘッド部材で加熱して前記半導体チップを前記配線基板に前記半田接続する工程と、
を有することを特徴とする半導体装置の製造方法。 - 請求項1記載の半導体装置の製造方法において、前記(a)工程で前記半導体チップを前記配線基板に前記半田接続する際に、前記半導体チップの各電極パッドにそれぞれボールマウント方法によって接合された半田バンプが設けられていることを特徴とする半導体装置の製造方法。
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