KR101191492B1 - 반도체 장치 및 그 제조 방법 - Google Patents
반도체 장치 및 그 제조 방법 Download PDFInfo
- Publication number
- KR101191492B1 KR101191492B1 KR1020080052677A KR20080052677A KR101191492B1 KR 101191492 B1 KR101191492 B1 KR 101191492B1 KR 1020080052677 A KR1020080052677 A KR 1020080052677A KR 20080052677 A KR20080052677 A KR 20080052677A KR 101191492 B1 KR101191492 B1 KR 101191492B1
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- Prior art keywords
- hole
- insulating film
- semiconductor
- semiconductor substrate
- film
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Abstract
Description
Claims (20)
- (a) 반도체 기판의 제1 면에 형성된 반도체 소자 위에 층간 절연막을 형성하고, 상기 층간 절연막의 내부에 형성된 배선을 통하여 상기 반도체 소자와 전기적으로 접속하는 패드를 상기 층간 절연막의 표면에 형성하는 공정과,(b) 상기 반도체 기판의 상기 제1 면과는 반대측에 있는 제2 면 위에 제1 레지스트막을 형성하는 공정과,(c) 상기 패드와 대향하는 위치에 제1 개구부를 갖도록 상기 제1 레지스트막을 패터닝하는 공정과,(d) 상기 제1 개구부를 형성한 상기 제1 레지스트막을 마스크로 하여 상기 반도체 기판을 에칭함으로써, 저면에 상기 층간 절연막을 노출하는 제1 구멍을 상기 반도체 기판에 형성하는 공정과,(e) 상기 제1 레지스트막을 제거하는 공정과,(f) 상기 제1 구멍의 저면에 노출되는 상기 층간 절연막을 에칭함으로써, 상기 제1 구멍의 저면을 상기 층간 절연막 위로서 상기 반도체 기판과 상기 층간 절연막의 경계보다도 상기 패드에 가까운 위치에 형성하는 공정과,(g) 상기 제1 구멍의 내벽을 포함하는 상기 반도체 기판의 상기 제2 면 위에 절연막을 형성하는 공정과,(h) 상기 절연막 위에 제2 레지스트막을 형성하는 공정과,(i) 상기 제1 구멍의 저면에 상기 제1 구멍의 직경보다도 작은 직경의 제2 개구부를 갖도록 상기 제2 레지스트막을 패터닝하는 공정과,(j) 상기 제2 개구부를 형성한 상기 제2 레지스트막을 마스크로 하여 상기 절연막 및 상기 층간 절연막을 에칭함으로써, 저면에 상기 패드를 노출하는 제2 구멍을 형성하는 공정과,(k) 상기 제1 구멍의 내벽 및 상기 제2 구멍의 내벽을 포함하는 상기 반도체 기판의 상기 제2 면에 도체막을 형성하고, 상기 도체막을 패터닝함으로써, 상기 반도체 기판의 상기 제2 면으로부터 상기 제1 면에 도달하고, 또한, 상기 패드에 전기적으로 접속하는 관통 전극을 형성하는 공정을 포함하고,상기 층간 절연막의 상기 반도체 기판측의 면은, 상기 제1 구멍의 저면과 상기 반도체 기판의 상기 제1 면에 의한 단차를 반영하여 단차 형상으로 되어 있고,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차 및 상기 제1 구멍의 저면과 상기 제2 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 (f) 공정은, 상기 반도체 기판에 형성된 상기 제1 구멍을 마스크로 하여 상기 제1 구멍의 저면에 노출되는 상기 층간 절연막을 에칭하는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제3항에 있어서,상기 (f) 공정에서는, 새로운 레지스트막에 의한 마스크를 사용하지 않는 한편, 상기 (d) 공정에서의 에칭에서 사용하는 에칭 가스와 상기 (f) 공정에서의 에칭에서 사용하는 에칭 가스는 상이한 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 (d) 공정 후에서의 상기 제1 구멍의 저면의 직경과, 상기 (f) 공정 후에서의 상기 제1 구멍의 저면의 직경은 동일한 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 (g) 공정 후, 상기 제1 구멍의 저면과 상기 패드 사이에 잔존하는 상기 층간 절연막과 상기 제1 구멍의 저면 위에 형성되어 있는 상기 절연막을 합친 막 두께는, 상기 (j) 공정에서 마스크로서 사용되는 상기 제2 레지스트막이 소실되기 전에 상기 제2 구멍이 형성되는 막 두께인 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 (c) 공정은, 적외 현미경을 이용하여 상기 패드와 대향하는 위치에 상기 제1 개구부를 갖도록 상기 제1 레지스트막을 패터닝하는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,(l) 상기 관통 전극과 접속하는 측과는 반대측의 상기 패드 위에 범프 전극을 형성하는 공정을 더 포함하는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 관통 전극은, 내부가 공동으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,(m) 제1 반도체 웨이퍼에 있는 개개의 칩 영역에 대하여 상기 (a) 공정부터 상기 (k) 공정까지의 처리를 실시함으로써 상기 제1 반도체 웨이퍼의 개개의 칩 영역에 형성된 제1 패드에 전기적으로 접속하는 제1 관통 전극을 형성한 후, 상기 제 1 관통 전극과 접속하는 측과는 반대측의 상기 제1 패드 위에 제1 범프 전극을 형성하는 공정과,(n) 제2 반도체 웨이퍼에 있는 개개의 칩 영역에 대하여 상기 (a) 공정부터 상기 (k) 공정까지의 처리를 실시함으로써 상기 제2 반도체 웨이퍼의 개개의 칩 영역에 형성된 제2 패드에 전기적으로 접속하는 제2 관통 전극을 형성한 후, 상기 제2 관통 전극과 접속하는 측과는 반대측의 상기 제2 패드 위에 제2 범프 전극을 형성하는 공정과,(o) 상기 제1 반도체 웨이퍼 위에 상기 제2 반도체 웨이퍼를 적층하여 전기적으로 접속하는 공정을 포함하고,상기 (o) 공정은, 상기 제2 반도체 웨이퍼에 형성되어 있는 상기 제2 범프 전극을 상기 제1 반도체 웨이퍼에 형성한 상기 제1 관통 전극에 압접에 의해 변형 주입함으로써, 상기 제1 반도체 웨이퍼와 상기 제2 반도체 웨이퍼를 전기적으로 접속하는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제1항에 있어서,(p) 상기 반도체 기판으로서 제1 반도체 웨이퍼를 이용하고, 상기 제1 반도체 웨이퍼에 있는 개개의 칩 영역에 대하여 상기 (a) 공정부터 상기 (k) 공정까지의 처리를 실시함으로써 상기 제1 반도체 웨이퍼의 개개의 칩 영역에 형성된 제1 패드에 전기적으로 접속하는 제1 관통 전극을 형성한 후, 상기 제1 반도체 웨이퍼 를 복수의 반도체 칩으로 개편화하여 제1 반도체 칩을 취득하는 공정과,(q) 상기 제1 반도체 칩에서, 상기 제1 관통 전극과 접속하는 측과는 반대측의 상기 제1 패드 위에 제1 범프 전극을 형성하는 공정과,(r) 상기 반도체 기판으로서 제2 반도체 웨이퍼를 이용하고, 상기 제2 반도체 웨이퍼에 있는 개개의 칩 영역에 대하여 상기 (a) 공정부터 상기 (k) 공정까지의 처리를 실시함으로써 상기 제2 반도체 웨이퍼의 개개의 칩 영역에 형성된 제2 패드에 전기적으로 접속하는 제2 관통 전극을 형성한 후, 상기 제2 반도체 웨이퍼를 복수의 반도체 칩으로 개편화하여 제2 반도체 칩을 취득하는 공정과,(s) 상기 제2 반도체 칩에서, 상기 제2 관통 전극과 접속하는 측과는 반대측의 상기 제2 패드 위에 제2 범프 전극을 형성하는 공정과,(t) 상기 제1 반도체 칩 위에 상기 제2 반도체 칩을 적층하여 전기적으로 접속하는 공정을 포함하고,상기 (t) 공정은, 상기 제2 반도체 칩에 형성되어 있는 상기 제2 범프 전극을 상기 제1 반도체 칩에 형성한 상기 제1 관통 전극에 압접에 의해 변형 주입함으로써, 상기 제1 반도체 칩과 상기 제2 반도체 칩을 전기적으로 접속하는 것을 특징으로 하는 반도체 장치의 제조 방법.
- (a) 반도체 기판의 제1 면에 형성된 반도체 소자 위에 층간 절연막을 형성하고, 상기 층간 절연막의 내부에 형성된 배선을 통하여 상기 반도체 소자와 전기적 으로 접속하는 패드를 상기 층간 절연막의 표면에 형성하는 공정과,(b) 상기 반도체 기판의 상기 제1 면과는 반대측에 있는 제2 면 위에 제1 레지스트막을 형성하는 공정과,(c) 상기 패드와 대향하는 위치에 제1 개구부를 갖도록 상기 제1 레지스트막을 패터닝하는 공정과,(d) 상기 제1 개구부를 형성한 상기 제1 레지스트막을 마스크로 하여 상기 반도체 기판을 에칭함으로써, 저면에 상기 층간 절연막을 노출하는 제1 구멍을 상기 반도체 기판에 형성하는 공정과,(e) 상기 제1 레지스트막을 제거하는 공정과,(f) 상기 제1 구멍의 저면에 노출되는 상기 층간 절연막을 에칭함으로써, 상기 제1 구멍의 저면을 상기 층간 절연막 위로서 상기 반도체 기판과 상기 층간 절연막의 경계보다도 상기 패드에 가까운 위치에 형성하는 공정과,(g) 상기 제1 구멍의 내벽을 포함하는 상기 반도체 기판의 상기 제2 면 위에 감광성 절연막을 형성하는 공정과,(h) 상기 제1 구멍의 저면에 상기 제1 구멍의 직경보다도 작은 직경의 제2 개구부를 갖도록 상기 감광성 절연막을 패터닝하는 공정과,(i) 상기 제2 개구부를 형성한 감광성 절연막을 마스크로 하여 상기 층간 절연막을 에칭함으로써, 저면에 상기 패드를 노출하는 제2 구멍을 형성하는 공정과,(j) 상기 제1 구멍의 내벽 및 상기 제2 구멍의 내벽을 포함하는 상기 반도체 기판의 상기 제2 면에 도체막을 형성하고, 상기 도체막을 패터닝함으로써, 상기 반 도체 기판의 상기 제2 면으로부터 상기 제1 면에 도달하고, 또한, 상기 패드에 전기적으로 접속하는 관통 전극을 형성하는 공정을 포함하고,상기 층간 절연막의 상기 반도체 기판측의 면은, 상기 제1 구멍의 저면과 상기 반도체 기판의 상기 제1 면에 의한 단차를 반영하여 단차 형상으로 되어 있고,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제12항에 있어서,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차 및 상기 제1 구멍의 저면과 상기 제2 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제12항에 있어서,상기 (f) 공정 후, 상기 제1 구멍의 저면과 상기 패드 사이에 잔존하는 상기 층간 절연막의 막 두께는, 상기 (i) 공정에서 마스크로서 사용되는 상기 감광성 절연막이 소실되기 전에 상기 제2 구멍이 형성되는 막 두께인 것을 특징으로 하는 반도체 장치의 제조 방법.
- 제12항에 있어서,상기 관통 전극은, 내부가 공동으로 되어 있는 것을 특징으로 하는 반도체 장치의 제조 방법.
- (a) 반도체 기판과,(b) 상기 반도체 기판의 제1 면에 형성된 반도체 소자와,(c) 상기 반도체 기판의 상기 제1 면 위에 형성된 층간 절연막과,(d) 상기 층간 절연막 위에 형성된 패드와,(e) 상기 패드 위에 형성된 범프 전극과,(f) 상기 반도체 기판의 상기 제1 면과는 반대측에 있는 제2 면으로부터 상기 패드에 도달하는 관통 전극을 포함하고,상기 관통 전극은,(f1) 상기 반도체 기판의 상기 제1 면과는 반대측에 있는 상기 제2 면으로부터 상기 층간 절연막에 도달하는 제1 구멍으로서, 상기 제1 구멍의 저면이 상기 층간 절연막과 상기 반도체 기판의 경계보다도 상기 패드에 가까운 위치까지 형성되어 있는 상기 제1 구멍과,(f2) 상기 제1 구멍의 구멍 직경보다도 작고, 상기 제1 구멍의 저면으로부터 상기 패드에 도달하도록 형성된 제2 구멍과,(f3) 상기 제1 구멍의 저면 및 측면과 상기 반도체 기판의 상기 제2 면 위에 형성된 절연막과,(f4) 상기 제2 구멍의 저면 및 측면과, 상기 절연막을 개재한 상기 제1 구멍의 저면 및 측면과 상기 반도체 기판의 상기 제2 면 위에 형성되고, 상기 패드와 전기적으로 접속된 도체막을 가지며,상기 층간 절연막의 상기 반도체 기판측의 면은, 상기 제1 구멍의 저면과 상기 반도체 기판의 상기 제1 면에 의한 단차를 반영하여 단차 형상으로 되어 있고,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치.
- 제16항에 있어서,상기 도체막의 표면은, 상기 반도체 기판의 상기 제2 면과 상기 제1 구멍의 저면에 의한 단차 및 상기 제1 구멍의 저면과 상기 제2 구멍의 저면에 의한 단차를 반영하여 단차 형상으로 되어 있는 것을 특징으로 하는 반도체 장치.
- 제16항에 있어서,상기 관통 전극은, 내부가 공동으로 되어 있는 것을 특징으로 하는 반도체 장치.
- 제16항에 있어서,상기 반도체 기판의 상기 제2 면측으로부터 상기 관통 전극을 보면, 평면적으로, 상기 제1 구멍에 의한 링과 상기 제1 구멍보다도 작은 상기 제2 구멍에 의한 링에 의해 2중 링으로 되어 있는 것을 특징으로 하는 반도체 장치.
- 제16항에 있어서,상기 제2 구멍의 저면인 상기 패드 위에 형성되어 있는 상기 도체막의 막 두께를 a로 하고, 상기 제1 구멍의 저면과 상기 패드 사이에 형성되어 있는 상기 층간 절연막의 막 두께 및 상기 제1 구멍의 저면 위에 형성되어 있는 상기 절연막의 막 두께를 합친 막 두께를 b로 할 때, a/(a + b)의 값이 0.11 이상인 것을 특징으로 하는 반도체 장치.
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CN101320702B (zh) | 2010-07-21 |
JP4937842B2 (ja) | 2012-05-23 |
US8324736B2 (en) | 2012-12-04 |
TWI357111B (ko) | 2012-01-21 |
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