发明授权
US08853038B2 Raised source/drain structure for enhanced strain coupling from stress liner
有权
用于增强应力衬垫的应变耦合的源/漏结构
- 专利标题: Raised source/drain structure for enhanced strain coupling from stress liner
- 专利标题(中): 用于增强应力衬垫的应变耦合的源/漏结构
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申请号: US13614572申请日: 2012-09-13
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公开(公告)号: US08853038B2公开(公告)日: 2014-10-07
- 发明人: Kangguo Cheng , Bruce Doris , Ali Khakifirooz , Pranita Kulkarni , Ghavam Shahidi
- 申请人: Kangguo Cheng , Bruce Doris , Ali Khakifirooz , Pranita Kulkarni , Ghavam Shahidi
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Fleit Gibbons Gutman Bongini & Bianco PL
- 代理商 Thomas Grzesik
- 主分类号: H01L21/336
- IPC分类号: H01L21/336 ; H01L29/66 ; H01L29/786 ; H01L21/762
摘要:
A gate stack is formed on a silicon layer that is above a buried oxide layer. The gate stack comprises a high-k oxide layer on the silicon layer and a metal gate on the high-k oxide layer. A first nitride layer is formed on the silicon layer and the gate stack. An oxide layer is formed on the first nitride layer. A second nitride layer is formed on the oxide layer. The first nitride layer and the oxide layer are etched so as to form a nitride liner and an oxide liner adjacent to the gate stack. The second nitride layer is etched so as to form a first nitride spacer adjacent to the oxide liner. A faceted raised source/drain region is epitaxially formed adjacent to the nitride liner, the oxide liner, and first nitride spacer. Ions are implanted into the faceted raised source/drain region using the first nitride spacer.
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