KR100621438B1 - 감광성 폴리머를 이용한 적층 칩 패키지 및 그의 제조 방법 - Google Patents
감광성 폴리머를 이용한 적층 칩 패키지 및 그의 제조 방법 Download PDFInfo
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- KR100621438B1 KR100621438B1 KR1020050080655A KR20050080655A KR100621438B1 KR 100621438 B1 KR100621438 B1 KR 100621438B1 KR 1020050080655 A KR1020050080655 A KR 1020050080655A KR 20050080655 A KR20050080655 A KR 20050080655A KR 100621438 B1 KR100621438 B1 KR 100621438B1
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Abstract
Description
Claims (27)
- 상부면에 복수의 칩 패드가 형성된 실리콘 기판과, 상기 칩 패드와 연결되어 상기 실리콘 기판을 관통하여 형성되며, 양단이 상기 실리콘 기판의 상부면과 하부면으로 일정 높이 돌출되게 형성된 관통 전극을 갖는 반도체 칩들과;상기 반도체 칩의 상부면으로 돌출된 상기 관통 전극의 일단을 제외한 상기 상부면을 덮는 감광성 폴리머층과;상부면에 상기 반도체 칩의 상부면이 향하도록 상기 반도체 칩들이 열압착으로 적층되는 배선기판과;상기 배선기판 상부면에 적층된 상기 반도체 칩들을 봉합하는 수지 봉합부와;상기 배선기판의 하부면에 형성되는 복수 개의 외부접속단자;를 포함하며,열압착에 의해 상기 관통 전극의 양단을 매개로 상기 반도체 칩들과 배선기판이 서로 전기적으로 연결되며, 상기 반도체 칩들의 감광성 폴리머층은 상기 반도체 칩들 사이와, 상기 배선기판과 최하부 반도체 칩 사이에 갭필되는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 1항에 있어서, 상기 관통 전극은,상기 실리콘 기판의 하부면으로 돌출된 접속 범프와;상기 접속 범프에 대응되는 상기 관통 전극의 상부면에 형성되며, 상기 감광 성 폴리머층 밖으로 노출되는 접속 패드;를 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 2항에 있어서, 상기 배선기판 상부면에 적층되는 최하부 반도체 칩의 접속 패드는 상기 감광성 폴리머층 밖으로 돌출된 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 2항 또는 제 3항에 있어서, 상기 접속 패드는 솔더인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 4항에 있어서, 상기 감광성 폴리머층은 감광성 성분이 포함된 열경화성 폴리머인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 5항에 있어서, 상기 열경화성 폴리머는 에폭시(epoxy), 폴리이미드(polyimide), 노블락 페놀(novolak phenol) 그리고 폴리노르보넨(polynorbonene)으로 이루어진 그룹에서 선택된 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- 제 6항에 있어서, 상기 관통 전극은 상기 실리콘 기판의 가장자리 부분에 형성된 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
- (a) 실리콘 기판의 상부면과 하부면으로 일정 높이 돌출된 관통 전극을 갖는 반도체 칩들이 형성된 웨이퍼를 준비하는 단계와;(b) 상기 상부면으로 돌출된 상기 관통 전극의 일단을 제외한 상기 상부면을 덮는 감광성 폴리머층을 형성하는 단계와;(c) 상기 웨이퍼를 개별 반도체 칩으로 분리하는 단계와;(d) 배선기판의 상부면에 상기 반도체 칩의 상부면이 향하도록 상기 반도체 칩들을 열압착시켜 접합하고, 상기 반도체 칩의 감광성 폴리머층은 상기 배선기판과 최하부 반도체 칩, 상기 반도체 칩들 사이를 접착하는 단계와;(e) 상기 배선기판 상부면에 적층된 상기 반도체 칩들을 봉합하는 수지 봉합부를 형성하는 단계와;(f) 상기 배선기판의 하부면에 복수 개의 외부접속단자를 형성하는 단계;를 포함하며,상기 (e) 단계에서 상기 감광성 폴리머층은 완전 경화되어 상기 반도체 칩들 사이와, 상기 배선기판과 반도체 칩 사이를 갭필하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 8항에 있어서, 상기 (a) 단계는,(a1) 상부면에 칩 패드들이 형성된 반도체 칩과, 상기 반도체 칩들을 구분하는 칩 절단 영역을 갖는 웨이퍼를 준비하는 단계와;(a2) 상기 칩 패드 또는 상기 칩 패드에 근접한 부분에 일정 깊이로 관통 구멍을 형성하는 단계와;(a3) 상기 칩 패드를 제외한 상기 관통 구멍의 내측과 상기 상부면에 절연층을 형성하는 단계와;(a4) 상기 관통 구멍 내에 충전되면서, 상기 칩 패드와 각기 연결되게 관통 전극을 형성하는 단계와;(a5) 상기 하부면을 선택적으로 제거하여 상기 관통 구멍 내에 충전된 상기 관통 전극의 일단부를 돌출시켜 접속 범프를 형성하는 단계;를 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 9항에 있어서, 상기 (a4) 단계는,(a41) 상기 칩 패드와 상기 관통 구멍의 내벽을 포함한 상기 상부면을 덮는 금속 기저층을 형성하는 단계와;(a42) 상기 관통 구멍 내에 충전되면서 상기 칩 패드와 연결되게 상기 금속 기저층 위에 금속 배선층을 형성하는 단계와;(a43) 상기 관통 구멍 상부의 상기 금속 배선층 위에 접속 패드를 형성하는 단계와;(a44) 상기 금속 배선층 외측의 상기 금속 기저층을 제거하는 단계;를 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 10항에 있어서, 상기 접속 패드는 전해 도금으로 형성된 솔더인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 11항에 있어서, 상기 (b) 단계에서 상기 배선기판 상부면에 적층되는 최하부 반도체 칩의 상부면에 형성된 상기 감광성 폴리머층은 상기 최하부 반도체 칩의 접속 패드보다는 낮게 형성된 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 12항에 있어서, 상기 (b) 단계에서 상기 최하부 반도체 칩 위에 적층되는 반도체 칩들의 상부면에 형성된 상기 감광성 폴리머층은 상기 실리콘 기판의 양면으로 돌출된 상기 관통 전극의 양단의 높이에 대응되는 높이로 형성되는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 13항에 있어서, 상기 (b) 단계에서 상기 최하부 반도체 칩 위에 적층되는 반도체 칩들의 상부면에 형성된 상기 감광성 폴리머층에는 상기 접속 패드가 노출되게 접속 구멍이 형성되어 있는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- 제 8항에 있어서, 상기 (d) 단계에서 상기 배선기판의 상부면에 적층된 상기 반도체 칩들이 적어도 한 곳 이상에 형성되며,(g) 상기 적층된 반도체 칩들 사이의 영역을 따라서 상기 배선기판을 절단하여 개별 적층 칩 패키지로 분리하는 단계;를 더 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 칩 레벨 제조 방법.
- (a) 상부면에 접속 패드가 돌출되어 있고, 상기 접속 패드 아래의 하부면에 접속 범프가 돌출된 관통 전극을 갖는 반도체 칩들을 포함하는 웨이퍼들을 준비하는 단계와;(b) 상기 접속 패드를 제외한 상기 웨이퍼의 상부면을 덮는 감광성 폴리머층을 형성하여 상기 웨이퍼들을 열압착으로 적층하여 상기 관통 전극을 매개로 접합하고 상기 감광성 폴리머층을 매개로 접착하는 단계와;(c) 상기 반도체 칩들 사이의 영역을 따라서 적층된 상기 웨이퍼를 절단하여 개별 적층 칩으로 분리하는 단계와;(d) 배선기판의 상부면에 상기 적층 칩의 상부면에 노출된 상기 접속 패드를 열압착시켜 접합하는 동시에 상기 적층 칩 상부면의 감광성 폴리머층을 매개로 상기 적층 칩을 상기 배선기판에 접착시키는 단계와;(e) 상기 배선기판 상부면에 실장된 상기 적층 칩들을 액상의 성형수지로 봉합하여 수지 봉합부를 형성하는 단계와;(f) 상기 배선기판의 하부면에 외부접속단자를 형성하는 단계;를 포함하며,상기 (e) 단계에서 상기 감광성 폴리머층은 완전 경화되어 상기 반도체 칩들 사이와, 상기 배선기판과 반도체 칩 사이를 갭필하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 16항에 있어서, 상기 (a) 단계는,(a1) 상기 상부면에 칩 패드들이 형성된 상기 반도체 칩과, 상기 반도체 칩들을 구분하는 칩 절단 영역을 갖는 상기 웨이퍼를 준비하는 단계와;(a2) 상기 칩 패드 또는 상기 칩 패드에 근접한 부분에 상기 상부면에서 일정 깊이로 관통 구멍을 형성하는 단계와;(a3) 상기 칩 패드를 제외한 상기 관통 구멍의 내측과 상기 상부면에 절연층을 형성하는 단계와;(a4) 상기 접속 구멍 내에 충전되면서, 상기 칩 패드와 각기 연결되게 관통 전극을 형성한 제 n 웨이퍼(n:1보다 큰 자연수)를 형성하는 단계;를 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 17항에 있어서, 상기 (a4) 단계는,(a41) 상기 칩 패드와 상기 관통 구멍의 내벽을 포함한 상기 상부면을 덮는 금속 기저층을 형성하는 단계와;(a42) 상기 관통 구멍 내에 충전되면서 상기 칩 패드와 연결되게 상기 금속 기저층 위에 금속 배선층을 형성하는 단계와;(a43) 상기 관통 구멍 상부의 상기 금속 배선층 위에 접속 패드를 형성하는 단계와;(a44) 상기 금속 배선층 외측의 상기 금속 기저층을 제거하는 단계;를 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 18항에 있어서, 상기 접속 패드는 전해 도금으로 형성된 솔더인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 17항에 있어서, 상기 (b) 단계는,(b1) 상기 관통 전극의 일단을 제외한 상기 제 n 웨이퍼 상부면을 덮는 감광성 폴리머층을 형성하는 단계와;(b2) n-1개의 상기 제 n 웨이퍼 상부면에 재가공 접착제를 개재하여 서포트 기판을 부착하여 제 1 내지 제 n-1 웨이퍼를 형성하는 단계와;(b3) 상기 제 1 및 제 n-1 웨이퍼의 하부면을 선택적으로 제거하여 상기 접속 구멍 내에 충전된 상기 관통 전극의 타단부를 돌출시킨 접속 범프를 형성하는 단계와;(b4) 상기 제 n 웨이퍼 상부면의 접속 패드에 상기 제 n-1 웨이퍼 하부면의 접속 범프를 열압착시켜 접합하는 동시에 상기 제 n 웨이퍼의 감광성 폴리머층을 매개로 상기 제 n 웨이퍼와 상기 제 n-1 웨이퍼를 접착시키는 단계와;(b5) 상기 제 n-1 웨이퍼 상부면에서 상기 재가공 접착제를 포함한 상기 서포트 기판을 분리하는 단계;를 포함하며,상기 (b4) 내지 (b5) 단계를 반복하면서 상기 제 n-1 웨이퍼 위에 상기 제 n-2부터 상기 제 1 웨이퍼까지 차례로 적층하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 20항에 있어서, 상기 (b) 단계에서 상기 제 1 웨이퍼의 상부면에 형성된 접속 패드가 상기 배선기판의 상부면에 접합될 수 있도록 상기 제 1 웨이퍼의 상부면에 형성된 감광성 폴리머층 위로 돌출되게 형성된 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 21항에 있어서, 적층된 상기 웨이퍼 사이에 위치하는 감광성 폴리머층은 상기 웨이퍼의 양면으로 돌출된 관통 전극의 양단의 높이에 대응되는 높이로 형성된 것을 특징으로 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 22항에 있어서, 상기 제 1 웨이퍼를 적층한 이후에 서포트 기판을 분리하기 전에, 상기 제 n 웨이퍼의 하부면을 연마하는 단계를 더 포함하는 것을 특징으로 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 23항에 있어서, 상기 서포트 기판은 상기 웨이퍼와 열팽창 계수가 유사한 실리콘 또는 유리 소재의 기판인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 24항에 있어서, 상기 재가공 접착제는 열가소성 접착제 또는 자외선 접착제인 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 25항에 있어서, 상기 (d) 단계에서 상기 배선기판의 상부면에 적층된 상기 반도체 칩들이 적어도 한 곳 이상에 형성되며,(g) 상기 적층된 반도체 칩들 사이의 영역을 따라서 상기 배선기판을 절단하여 개별 적층 칩 패키지로 분리하는 단계;를 더 포함하는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지의 웨이퍼 레벨 제조 방법.
- 제 1항에 있어서,상부면에 복수의 칩 패드가 형성된 실리콘 기판과, 상기 칩 패드와 연결되어 상기 실리콘 기판의 상부면에서 일정 높이로 돌출된 관통 전극을 가지며, 적층된 상기 반도체 칩들의 최상부에 상기 관통 전극을 매개로 적층되는 반도체 칩;을 더 포함하며,상기 관통 전극은 상기 실리콘 기판의 하부면으로 노출되지 않는 것을 특징으로 하는 감광성 폴리머를 이용한 적층 칩 패키지.
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Also Published As
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US7459774B2 (en) | 2008-12-02 |
US20070045836A1 (en) | 2007-03-01 |
US20070048969A1 (en) | 2007-03-01 |
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