发明申请
- 专利标题: METHOD FOR MAKING A RAISED VERTICAL CHANNEL TRANSISTOR DEVICE
- 专利标题(中): 制造垂直通道晶体管器件的方法
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申请号: US11536686申请日: 2006-09-29
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公开(公告)号: US20080012066A1公开(公告)日: 2008-01-17
- 发明人: Shian-Jyh Lin
- 申请人: Shian-Jyh Lin
- 优先权: TW095125767 20060714
- 主分类号: H01L21/8238
- IPC分类号: H01L21/8238
摘要:
A method for fabricating a vertical channel transistor device is provided. An opening is formed in a dielectric stack comprised of a pad nitride layer and a pad oxide layer. A plurality of epitaxial silicon growth and dry etching processes are carried out to form drain, vertical channel and source in the opening. Subsequently, sidewall gate dielectric and sidewall gate electrode are formed on the vertical channel. The present invention is suited for dynamic random access memory (DRAM) devices, particularly suited for very high-density trench-capacitor DRAM devices.
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