发明授权
US07179745B1 Method for offsetting a silicide process from a gate electrode of a semiconductor device
失效
将硅化物工艺与半导体器件的栅电极相抵消的方法
- 专利标题: Method for offsetting a silicide process from a gate electrode of a semiconductor device
- 专利标题(中): 将硅化物工艺与半导体器件的栅电极相抵消的方法
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申请号: US10860100申请日: 2004-06-04
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公开(公告)号: US07179745B1公开(公告)日: 2007-02-20
- 发明人: Andrew M. Waite , Jon D. Cheek , David Brown
- 申请人: Andrew M. Waite , Jon D. Cheek , David Brown
- 申请人地址: US CA Sunnyvale
- 专利权人: Advanced Micro Devices, Inc.
- 当前专利权人: Advanced Micro Devices, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 主分类号: H01L21/311
- IPC分类号: H01L21/311
摘要:
A method for offsetting silicide on a semiconductor device having a polysilicon gate electrode, source and drain regions in a substrate, and source and drain extensions in the substrate, employs a titanium nitride sidewall spacer on the sidewalls of the polysilicon gate electrode. The titanium nitride sidewall spacer prevents silicide growth on top of the source and drain extensions during a salicidation process. The titanium nitride sidewall spacers are then removed by an etching process that does not etch the silicide regions formed in the source and drain regions and the polysilicon gate electrode. Following removal of the titanium nitride sidewall spacers, a low k interlevel dielectric layer or a stress liner may be deposited on top of the devices to enhance device performance.
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