发明申请
- 专利标题: METHOD FOR FABRICATING RECESSED GATE MOS TRANSISTOR DEVICE
- 专利标题(中): 用于制造接收栅极MOS晶体管器件的方法
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申请号: US11685756申请日: 2007-03-13
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公开(公告)号: US20070264772A1公开(公告)日: 2007-11-15
- 发明人: Yu-Pi Lee , Shian-Jyh Lin , Jar-Ming Ho
- 申请人: Yu-Pi Lee , Shian-Jyh Lin , Jar-Ming Ho
- 优先权: TW095116901 20060512
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
A method of fabricating self-aligned gate trench utilizing trench top oxide (TTO) poly spacer is disclosed. A semiconductor substrate having thereon a pad oxide layer and pad nitride layer is provided. A plurality of trench capacitors are embedded in a memory array region of the semiconductor substrate. Each of the trench capacitors has a TTO that extrudes from a main surface of the semiconductor substrate. Poly spacers are formed on two opposite sides of the extruding TTO and are used, after oxidized, as an etching hard mask for etching a recessed gate trench in close proximity to the trench capacitor.
公开/授权文献
- US07510930B2 Method for fabricating recessed gate MOS transistor device 公开/授权日:2009-03-31
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