发明授权
US6037223A Stack gate flash memory cell featuring symmetric self aligned contact
structures
有权
具有对称自对准接触结构的堆栈门闪存单元
- 专利标题: Stack gate flash memory cell featuring symmetric self aligned contact structures
- 专利标题(中): 具有对称自对准接触结构的堆栈门闪存单元
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申请号: US177342申请日: 1998-10-23
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公开(公告)号: US6037223A公开(公告)日: 2000-03-14
- 发明人: Hung-Der Su , Chrong-Jung Lin , Jong Chen , Di-Son Kuo
- 申请人: Hung-Der Su , Chrong-Jung Lin , Jong Chen , Di-Son Kuo
- 申请人地址: TWX Hsin-Chu
- 专利权人: Taiwan Semiconductor Manufacturing Company, Ltd.
- 当前专利权人: Taiwan Semiconductor Manufacturing Company, Ltd.
- 当前专利权人地址: TWX Hsin-Chu
- 主分类号: H01L21/8247
- IPC分类号: H01L21/8247
摘要:
A process for fabricating a flash memory cell, featuring self-aligned contact structures, overlying and contacting, self-aligned source, and self-aligned drain regions, located between stack gate structures, has been developed. The stack gate structures, located on an underlying silicon dioxide, tunnel oxide layer, are comprised of: a capping insulator shape; a polysilicon control gate shape; an inter-polysilicon dielectric shape; and a polysilicon floating gate shape. The use of self-aligned contact structures, and self-aligned source regions, allows increased cell densities to be achieved.
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