发明授权
- 专利标题: Semiconductor device using fuse/anti-fuse system
- 专利标题(中): 半导体器件采用熔丝/反熔丝系统
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申请号: US11859388申请日: 2007-09-21
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公开(公告)号: US07615813B2公开(公告)日: 2009-11-10
- 发明人: Yoshiaki Fukuzumi , Yusuke Kohyama
- 申请人: Yoshiaki Fukuzumi , Yusuke Kohyama
- 申请人地址: JP Kawasaki-shi
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JP Kawasaki-shi
- 代理机构: Banner & Witcoff, Ltd.
- 优先权: JP2000-039968 20000217
- 主分类号: H01L21/8234
- IPC分类号: H01L21/8234
摘要:
A first concave portion for the element isolation, a second concave portion for an aligning mark, and a third concave portion for an anti-fuse portion are formed simultaneously within a silicon substrate. After a silicon oxide film is formed on the entire surface, the silicon oxide film positioned within the second and third concave portions is removed. Then, a gate insulating film is formed on the entire surface, followed by forming a polysilicon film on the gate insulating film. Further, these polysilicon film and gate insulating film are selectively removed to form a gate electrode above an element region, an aligning mark portion in the second concave portion, and a gate electrode for an anti-fuse portion on the bottom surface of the third concave portion.
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