发明授权
US06008099A Fabrication process employing a single dopant implant for formation of a
drain extension region and a drain region of an LDD MOSFET using
enhanced lateral diffusion
失效
使用单个掺杂剂注入的制造工艺,用于使用增强的横向扩散来形成LDD MOSFET的漏极延伸区域和漏极区域
- 专利标题: Fabrication process employing a single dopant implant for formation of a drain extension region and a drain region of an LDD MOSFET using enhanced lateral diffusion
- 专利标题(中): 使用单个掺杂剂注入的制造工艺,用于使用增强的横向扩散来形成LDD MOSFET的漏极延伸区域和漏极区域
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申请号: US50689申请日: 1998-03-30
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公开(公告)号: US06008099A公开(公告)日: 1999-12-28
- 发明人: Akif Sultan , Dong-Hyuk Ju
- 申请人: Akif Sultan , Dong-Hyuk Ju
- 申请人地址: 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: CA Sunnyvale
- 主分类号: H01L21/265
- IPC分类号: H01L21/265 ; H01L21/336
摘要:
A method of making a lightly doped drain transistor includes the steps of forming a gate electrode (52) and a gate oxide (54) over a semiconductor substrate (56) and forming a drain (70) in a drain region (58) and a source (72) in a source region (60) of the substrate (56). The method further includes generating interstitials (62) near a lateral edge of at least one of the drain (70) and the source (72) and thermally treating the substrate (56). The thermal treatment cause the interstitials (62) to enhance a lateral diffusion (84) of the drain (70) under the gate oxide (54) without substantially impacting a vertical diffusion (82) of the drain (70) or the source (72). The enhanced lateral diffusion (84) results in the formation of at least one of a lightly doped drain extension region (75) and a lightly doped source extension region (76) without an increase in a junction depth of the drain (70) or the source (72). The step of generating interstitials (62) may include the step of implanting at least one of the drain region (58) and the source region (60) of the substrate (56) with a large tilt angle implant which creates the interstitials (62) at a location near the gate oxide (54).
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