JP5503322B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
- Publication number
- JP5503322B2 JP5503322B2 JP2010030336A JP2010030336A JP5503322B2 JP 5503322 B2 JP5503322 B2 JP 5503322B2 JP 2010030336 A JP2010030336 A JP 2010030336A JP 2010030336 A JP2010030336 A JP 2010030336A JP 5503322 B2 JP5503322 B2 JP 5503322B2
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- semiconductor device
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- manufacturing
- heat treatment
- insulating film
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Description
(1)配線基板の表面にダイボンドフィルムを貼り付けるときに、配線基板から発生したガスが、ダイボンドフィルムの内部に気泡となって取り込まれて残存する。その後、その気泡内に水分が溜まり、例えば半導体装置を実装基板上に半田を用いて実装する際に、ダイボンドフィルムに260℃程度の熱が加わると、水蒸気爆発が生じる。
(2)配線基板から発生したガスにより半導体チップの表面が汚染されると、ワイヤボンディング工程において、ボンディングワイヤが半導体チップの表面に配列された電極パッドと接続せずに、剥がれる。
(3)配線基板から発生したガスにより半導体チップの表面が汚染されると、モールド工程において、半導体チップと半導体チップを封止する樹脂封止体との密着性が低下する。
(1)ソルダーレジスト8上に接着層10を介して半導体チップ11を貼り付ける際に、配線基板1Aを構成する材料に含まれる有機溶剤がガス化し、ガス化した有機溶剤が気泡となって接着層10の内部にトラップされ、残存することがないので、接着層10の内部に水分が溜まらなくなる。従って、その後の工程、例えば半導体装置を実装基板上に半田を用いて実装する工程において260℃程度の熱が加わっても、水蒸気爆発等の危険性はない。
(2)また、半導体チップ11の表面が、ガス化された有機溶剤によって汚染されないので、導電性部材13と半導体チップ11の表面に配列された電極パッド12との接続強度の低下を防止することができる。
(3)また、半導体チップ11の表面が、ガス化された有機溶剤によって汚染されないので、半導体チップ11と封止樹脂体14との密着性の低下を防止することができる。
(4)また、例えばダイボンディング装置やワイヤボンディング装置が、ガス化された有機溶剤によって汚れないので、例えばプラズマクリーニングによるこれら装置の清掃頻度が低くなるので、生産性を向上することができる。
(5)また、脱湿のための熱処理と、有機溶剤に起因するガスを放出するための熱処理とを別々に行なうことにより、熱処理時間および温度を任意に設定できるので、配線基板にかかる熱履歴によるダメージを低減することができる。つまり、脱湿のための熱処理は、水が有機溶剤に起因するガス成分より比較的蒸発しにくいので、長時間かつ低温度を選択する。一方、有機溶剤に起因するガスを放出するための熱処理は、ガス成分が水に比べて蒸発し易いが沸点は高いので、短時間かつ高温を選択する。
1A 配線基板
2 銅箔
3 貫通孔(ビア)
4 シード層
5 銅膜
6 レジスト膜
7 配線層
7a ボンディングリード(電極パッド)
7b バンプランド(電極パッド)
8 ソルダーレジスト
9 メッキ膜
10 接着層(ダイボンド材)
11 半導体チップ
12 電極パッド
13 導電性部材
14 樹脂封止体(封止体)
15 半田ボール
16 ダイシングブレード
17 ダイシングライン
20 半導体装置
Claims (18)
- 以下の工程を含む、半導体装置の製造方法:
(a)基材と、前記基材の第1面側に形成された複数のボンディングリードと、前記第1面とは反対側の前記基材の第2面側に形成された複数のバンプランドと、有機溶剤を含む絶縁性樹脂を主成分とし、かつ、前記複数のボンディングリードのそれぞれが露出するように前記基材の前記第1面側に形成された第1面側絶縁膜と、有機溶剤を含む絶縁性樹脂を主成分とし、かつ、前記複数のバンプランドのそれぞれが露出するように前記基材の前記第2面側に形成された第2面側絶縁膜と、前記第1面側絶縁膜から露出する前記複数のボンディングリードのそれぞれの表面に形成された第1メッキ膜と、を備えた配線基板を準備する工程;
(b)前記(a)工程の後、前記配線基板の第1面側絶縁膜上に、接着層を介して半導体チップを搭載する工程;
(c)前記(b)工程の後、前記半導体チップの複数の電極パッドと、前記配線基板の前記複数のボンディングリードとを、複数の導電性部材を介して、それぞれ電気的に接続する工程;
ここで、
前記(a)工程において準備される前記配線基板は、以下の工程(a1)〜(a4)により製造され、
(a1)前記基材の前記第1面側に前記第1面側絶縁膜を、前記基材の前記第2面側に前記第2面側絶縁膜を、それぞれ形成する工程;
(a2)前記(a1)工程の後、前記第1面側絶縁膜および前記第2面側絶縁膜のそれぞれが形成された前記基材に対して、第1の熱処理を施す工程;
(a3)前記(a2)工程の後、前記第1面側絶縁膜から露出する前記複数のボンディングリードのそれぞれの前記表面に前記第1メッキ膜を形成する工程;
(a4)前記(a3)工程の後、前記第1面側絶縁膜および前記第2面側絶縁膜のそれぞれが形成された前記基材に対して、第2の熱処理を施す工程;
前記第1の熱処理における温度は、前記第2の熱処理における温度よりも高く、
前記第1の熱処理における時間は、前記第2の熱処理における時間よりも短い。 - 請求項1記載の半導体装置の製造方法において、
前記基材は、有機溶剤を含むエポキシ樹脂を主成分と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)工程で準備する前記配線基板は、さらに、前記第2面側絶縁膜から露出する前記複数のバンプランドのそれぞれの表面に形成された第2メッキ膜を備えており、
前記(a3)工程では、前記第1面側絶縁膜から露出する前記複数のボンディングリードのそれぞれの前記表面に前記第1メッキ膜を、前記第2面側絶縁膜から露出する前記複数のバンプランドのそれぞれの前記表面に前記第2メッキ膜を、それぞれ形成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、
前記接着層は、フィルム状の接着剤であ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、
前記第1の熱処理における温度は、200℃以上であり、
前記第2の熱処理における温度は、150℃以下であ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、
前記第1の熱処理における時間は、1時間以下であり、
前記第2の熱処理における時間は、3時間以上であ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(b)工程では、第3の熱処理を施すことで、前記配線基板の前記第1面側絶縁膜上に前記半導体チップを搭載し、
前記第3の熱処理における温度は、前記第2の熱処理における温度よりも高い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、
前記第3の熱処理における温度は、200℃以上であ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(c)工程の後、前記半導体チップ、前記複数の導電性部材および前記接着層を封止樹脂で封止することを特徴とする半導体装置の製造方法。 - 以下の工程を含む、半導体装置の製造方法:
(a)基材と、前記基材の第1面側に形成された複数のボンディングリードと、前記第1面とは反対側の前記基材の第2面側に形成された複数のバンプランドと、有機溶剤を含む絶縁性樹脂を主成分とし、かつ、前記複数のボンディングリードのそれぞれが露出するように前記基材の前記第1面側に形成された第1面側絶縁膜と、有機溶剤を含む絶縁性樹脂を主成分とし、かつ、前記複数のバンプランドのそれぞれが露出するように前記基材の前記第2面側に形成された第2面側絶縁膜と、前記第1面側絶縁膜から露出する前記複数のボンディングリードのそれぞれの表面に形成された第1メッキ膜と、を備えた配線基板を準備する工程;
(b)前記(a)工程の後、前記配線基板の前記第1面側絶縁膜上に、接着層を介して半導体チップを搭載する工程;
(c)前記(b)工程の後、前記半導体チップの複数の電極パッドと前記配線基板の前記複数のボンディングリードとを、複数の導電性部材を介して、それぞれ電気的に接続する工程;
ここで、
前記(a)工程において準備される前記配線基板は、以下の工程(a1)〜(a4)により製造され、
(a1)前記基材の前記第1面側に前記第1面側絶縁膜を、前記基材の前記第2面側に前記第2面側絶縁膜を、それぞれ形成する工程;
(a2)前記(a1)工程の後、前記第1面側絶縁膜および前記第2面側絶縁膜のそれぞれが形成された前記基材に対して、第1の熱処理を施す工程;
(a3)前記(a2)工程の後、前記第1面側絶縁膜および前記第2面側絶縁膜のそれぞれが形成された前記基材の外観検査を行う工程;
(a4)前記(a3)工程の後、前記第1面側絶縁膜および前記第2面側絶縁膜のそれぞれが形成された前記基材に対して、第2の熱処理を施す工程;
前記第1の熱処理における温度は、前記第2の熱処理における温度よりも高く、
前記第1の熱処理における時間は、前記第2の熱処理における時間よりも短い。 - 請求項10記載の半導体装置の製造方法において、
前記基材は、有機溶剤を含むエポキシ樹脂を主成分とすることを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記(a)工程で準備する前記配線基板は、さらに、前記第2面側絶縁膜から露出する前記複数のバンプランドのそれぞれの表面に形成された第2メッキ膜を備えており、
前記(a3)工程では、前記第1面側絶縁膜から露出する前記複数のボンディングリードのそれぞれの前記表面に前記第1メッキ膜を、前記第2面側絶縁膜から露出する前記複数のバンプランドのそれぞれの前記表面に前記第2メッキ膜を、それぞれ形成することを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記接着層は、フィルム状の接着剤であることを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記第1の熱処理における温度は、200℃以上であり、
前記第2の熱処理における温度は、150℃以下であることを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記第1の熱処理における時間は、1時間以下であり、
前記第2の熱処理における時間は、3時間以上であることを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記(b)工程では、第3の熱処理を施すことで、前記配線基板の前記第1面側絶縁膜上に前記半導体チップを搭載し、
前記第3の熱処理における温度は、前記第2の熱処理における温度よりも高いことを特徴とする半導体装置の製造方法。 - 請求項16記載の半導体装置の製造方法において、
前記第3の熱処理における温度は、200℃以上であることを特徴とする半導体装置の製造方法。 - 請求項10記載の半導体装置の製造方法において、
前記(c)工程の後、前記半導体チップ、前記複数の導電性部材および前記接着層を封止樹脂で封止することを特徴とする半導体装置の製造方法。
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