KR100577562B1 - 핀 트랜지스터 형성방법 및 그에 따른 구조 - Google Patents
핀 트랜지스터 형성방법 및 그에 따른 구조 Download PDFInfo
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- KR100577562B1 KR100577562B1 KR1020040007426A KR20040007426A KR100577562B1 KR 100577562 B1 KR100577562 B1 KR 100577562B1 KR 1020040007426 A KR1020040007426 A KR 1020040007426A KR 20040007426 A KR20040007426 A KR 20040007426A KR 100577562 B1 KR100577562 B1 KR 100577562B1
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Abstract
Description
Claims (21)
- 벌크 실리콘 기판을 이용하여 핀 트랜지스터를 형성하는 방법에 있어서:상기 기판의 소정 영역에 비활성영역과 핀 활성영역을 정의하는 소자분리막을 형성하는 단계;상기 소자분리막의 일부에 상기 기판의 상부 표면으로부터 일정 깊이를 갖는 제1 리세스를 형성하고, 상기 핀 활성영역의 일부에 상기 제1 리세스 보다 얕은 깊이를 갖는 제2 리세스를 형성하는 단계;상기 제2 리세스 내에 게이트 절연막을 형성하는 단계;상기 제2 리세스의 상부에 게이트를 형성하는 단계; 및상기 게이트 전극 양측의 핀 활성영역에 소오스 및 드레인 영역을 형성하는 단계를 포함하는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 제1 리세스의 깊이는 1000Å 내지 1500Å 정도로 형성되는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 제2 리세스의 깊이는 300Å 내지 350Å 정도로 형성되는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 제2 리세스는 비활성영역으로 둘러싸인 핀 활성영역에 2개의 리세스를 갖는 듀얼 리세스로 형성되는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서, 제1 및 제2 리세스를 형성하는 단계는,상기 소자분리막을 형성한 후, 상기 기판의 전면에 산화막을 형성하는 단계;상기 결과물 상에 반사방지막 및 포토레지스트를 형성하는 단계;사진공정을 진행하여 게이트가 형성될 부분을 노출시키는 포토레지스트 패턴을 형성하는 단계;상기 포토레지스트 패턴을 식각마스크로 이용하여 식각공정을 진행함에 의해 상기 소자분리막의 일부에는 제1 리세스를 형성하고, 상기 핀 활성영역의 일부에는 상기 제2 리세스 보다 얕은 깊이를 갖는 제2 리세스를 형성하는 단계; 및상기 포토레지스트 및 반사방지막을 제거하는 단계를 포함하는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 제1 및 제2 리세스를 형성한 후, 상기 제2 리세스의 하부에 불순물을 이온주입하여 문턱전압 조절영역을 형성하는 단계를 더 포함하는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서, 상기 소자분리막을 형성하는 단계는,상기 기판의 비활성영역에 일정 깊이의 트렌치를 형성하는 단계;상기 트렌치의 측벽에 산화막 및 질화막을 순차적으로 적층하는 단계; 및상기 트렌치 내에 절연막을 채워 소자분리막을 형성하는 단계를 포함하는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 7항에 있어서,상기 트렌치는 2500Å 내지 3000Å 정도의 깊이로 형성되는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 7항에 있어서,상기 소자분리막은 SOG, USG, BPSG, PSG, PE-TEOS 및 유동성 산화막 재질로 이루어진 산화막군에서 어느 하나로 형성되거나, 상기 산화막군 중에서 둘 이상을 포함하는 다중막으로 형성되는 것을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 게이트 절연막은 산화막 재질로 이루어짐을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서, 상기 게이트를 형성하는 단계는,상기 제1 및 제2 리세스 내에 도전성 물질을 채워 게이트 도전막을 형성하는 단계;상기 게이트 도전막 상에 캡핑막을 형성하는 단계;사진 및 식각공정으로 패터닝하여 상기 제2 리세스 내에서 상기 핀 활성영역의 표면 상부까지 연장되는 게이트 도전막 및 상기 게이트 도전막 상에 캡핑막을 갖는 게이트 스택을 형성하는 단계; 및상기 게이트 스택의 측벽에 게이트 스페이서를 형성하는 단계를 포함함을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 11항에 있어서,상기 게이트 전극은 폴리실리콘막의 단일막으로 이루어지거나 폴리사이드 구조로 형성된 다중막으로 이루어짐을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 11항에 있어서,상기 캡핑막은 실리콘 질화막 재질로 형성됨을 특징으로 하는 핀 트랜지스터 형성방법.
- 제 1항에 있어서,상기 소오스 및 드레인 영역은 저농도 소오스 및 드레인 영역과, 고농도 소오스 및 드레인 영역을 갖는 LDD 구조로 이루어짐을 특징으로 하는 핀 트랜지스터 형성방법.
- 소자분리막에 의하여 활성영역 및 비활성영역이 정의된 벌크 실리콘 기판에 형성된 핀 트래지스터의 구조에 있어서:상기 소자분리막 사이에 상기 소자분리막과 일정 높이의 단차를 가지면서 돌 출된 형태로 형성된 핀 활성영역;상기 핀 활성영역의 표면으로부터 일정 깊이를 갖고, 상기 핀 활성영역의 표면 상부까지 연장되는 게이트 전극;상기 게이트 전극의 하부에 형성된 게이트 절연막; 및상기 게이트 전극 양측의 핀 활성영역에 형성된 소오스 및 드레인 영역을 포함하는 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 핀 활성영역의 최상부는 상기 소자분리막의 최상부 보다 1000Å 내지 1500Å 정도 높게 형성되는 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 핀 활성영역의 상부 에지 부분이 라운딩된 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 게이트 전극은 상기 핀 활성영역의 상부 표면으로부터 300Å 내지 350 Å 정도의 깊이를 갖는 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 게이트 전극의 바닥면은 상기 핀 활성영역의 표면으로부터 일정 깊이를 갖고, 라운딩된 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 게이트 절연막의 하부에 문턱전압 조절영역을 더 구비하는 것을 특징으로 하는 핀 트랜지스터 구조.
- 제 15항에 있어서,상기 게이트 전극은 듀얼 게이트 구조를 갖는 것을 특징으로 하는 핀 트랜지스터 구조.
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US11/050,915 US7217623B2 (en) | 2004-02-05 | 2005-02-04 | Fin FET and method of fabricating same |
US11/733,704 US7868380B2 (en) | 2004-02-05 | 2007-04-10 | Fin FET and method of fabricating same |
US12/622,798 US8053833B2 (en) | 2004-02-05 | 2009-11-20 | Fin FET and method of fabricating same |
US13/178,308 US8264034B2 (en) | 2004-02-05 | 2011-07-07 | Fin FET and method of fabricating same |
US13/429,969 US9018697B2 (en) | 2004-02-05 | 2012-03-26 | fin FET and method of fabricating same |
US14/695,672 US9196733B2 (en) | 2004-02-05 | 2015-04-24 | Fin FET and method of fabricating same |
US14/931,490 US9640665B2 (en) | 2004-02-05 | 2015-11-03 | Fin FET and method of fabricating same |
US15/494,845 US9893190B2 (en) | 2004-02-05 | 2017-04-24 | Fin FET and method of fabricating same |
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KR100967679B1 (ko) | 2008-01-08 | 2010-07-07 | 주식회사 하이닉스반도체 | 반도체 소자의 제조방법 |
KR100971419B1 (ko) * | 2008-04-18 | 2010-07-21 | 주식회사 하이닉스반도체 | 리세스드 게이트를 구비한 반도체소자의 제조 방법 |
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