发明授权
- 专利标题: Process for forming dual metal gate structures
- 专利标题(中): 双金属门结构形成工艺
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申请号: US10410043申请日: 2003-04-09
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公开(公告)号: US06790719B1公开(公告)日: 2004-09-14
- 发明人: Olubunmi O. Adetutu , Eric D. Luckowski , Srikanth B. Samavedam , Arturo M. Martinez, Jr.
- 申请人: Olubunmi O. Adetutu , Eric D. Luckowski , Srikanth B. Samavedam , Arturo M. Martinez, Jr.
- 主分类号: H01L21337
- IPC分类号: H01L21337
摘要:
A semiconductor device has a P channel gate stack comprising a first metal type and a second metal type over the first metal type and an N channel gate stack comprising the second metal type in direct contact with the a gate dielectric. The N channel gate stack and a portion of the P channel gate stack are etched by a dry etch. The etch of P channel gate stack is completed with a wet etch. The wet etch is very selective to the gate dielectric and to the second metal type so that the N channel transistor is not adversely effected by completing the etch of the P channel gate stack.
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