发明授权
US5278090A Method for manufacturing a dynamic RAM having 3-dimensional memory cell
structure
失效
一种具有3维存储单元结构的动态RAM的制造方法
- 专利标题: Method for manufacturing a dynamic RAM having 3-dimensional memory cell structure
- 专利标题(中): 一种具有3维存储单元结构的动态RAM的制造方法
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申请号: US942393申请日: 1992-09-09
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公开(公告)号: US5278090A公开(公告)日: 1994-01-11
- 发明人: Tohru Yoshida
- 申请人: Tohru Yoshida
- 申请人地址: JPX Kawasaki
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX2-11232 19900120
- 主分类号: H01L27/10
- IPC分类号: H01L27/10 ; H01L21/8242 ; H01L27/108 ; H01L21/70 ; H01L27/00
摘要:
A semiconductor region of a first conductivity type is formed in a column configuration on a semiconductor substrate, and acts as a source region (or a drain region) and a storage node electrode. A second semiconductor region of the first conductivity type is formed with a capacitor insulation film disposed between it and the side wall of the first semiconductor region and acts as a cell plate electrode. A third semiconductor region of a second conductivity type which is formed in an annular configuration is formed on the upper portion of the first semiconductor region and acts as a channel region. A first conductive layer is formed with a gate insulation film disposed between the first conductive layer and each of the inner and outer side walls of the third semiconductor region and acts as a transfer gate electrode. A fourth semiconductor region of the first conductivity type is formed in an area near the end portion of the opening of the third semiconductor region which is formed in the annular configuration and acts as a drain region (or a source region). A second conductive layer is formed in contact with the fourth semiconductor region and acts as a bit line.
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