发明授权
US5976937A Transistor having ultrashallow source and drain junctions with reduced
gate overlap and method
有权
具有超低源极和漏极结的晶体管具有减少的栅极重叠和方法
- 专利标题: Transistor having ultrashallow source and drain junctions with reduced gate overlap and method
- 专利标题(中): 具有超低源极和漏极结的晶体管具有减少的栅极重叠和方法
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申请号: US136750申请日: 1998-08-19
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公开(公告)号: US5976937A公开(公告)日: 1999-11-02
- 发明人: Mark S. Rodder , Mahalingam Nandakumar
- 申请人: Mark S. Rodder , Mahalingam Nandakumar
- 申请人地址: TX Dallas
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 当前专利权人地址: TX Dallas
- 主分类号: H01L21/265
- IPC分类号: H01L21/265 ; H01L21/336 ; H01L21/8234
摘要:
Method of making transistors having ultrashallow source and drain junction with reduced gate overlap may comprise forming a first gate electrode (124) separated from a first active area (126) of a semiconductor layer (112) by a first gate insulator (130). A second gate electrode (140) may be formed substantially perpendicular to the first gate electrode (124) and separated from a second active area (142) of the semiconductor layer by a second gate insulator (146). A masking layer (160) may be formed over the semiconductor layer (112) and expose a source and a drain section (162 and 164) of the first active area (126) and a source and a drain section (166 and 168) of the second active area (142). Dopants may be implanted from a first direction substantially parallel to the first gate electrode (124) into the source and drain sections (166 and 168) of the first active area (126). The dopants are implanted in the first direction at an angle at which the masking layer (160) blocks entry of the dopants into the source and drain sections (166 and 168) of the second active area (142). Dopants may be implanted from a second direction substantially parallel to the second gate electrode (140) and perpendicular to the first direction into the source and drain sections (166 and 168) of the second active area (142). The dopants are implanted in the second direction at an angle at which the masking layer (160) blocks entry of the dopants into the source and drain sections (162 and 164) of the first active area (126).
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