发明授权
- 专利标题: Vertical MOSFET
- 专利标题(中): 垂直MOSFET
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申请号: US09790011申请日: 2001-02-09
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公开(公告)号: US06414347B1公开(公告)日: 2002-07-02
- 发明人: Ramachandra Divakaruni , Heon Lee , Jack A. Mandelman , Carl J. Radens , Jai-Hoon Sim
- 申请人: Ramachandra Divakaruni , Heon Lee , Jack A. Mandelman , Carl J. Radens , Jai-Hoon Sim
- 主分类号: H01L2972
- IPC分类号: H01L2972
摘要:
An improved process for making a vertical MOSFET structure comprising: A method of forming a semiconductor memory cell array structure comprising: providing a vertical MOSFET DRAM cell structure having a deposited gate conductor layer planarized to a top surface of a trench top oxide on the overlying silicon substrate; forming a recess in the gate conductor layer below the top surface of the silicon substrate; implanting N-type dopant species through the recess at an angle to form doping pockets in the array P-well; depositing an oxide layer into the recess and etching said oxide layer to form spacers on sidewalls of the recess; depositing a gate conductor material into said recess and planarizing said gate conductor to said top surface of the trench top oxide.
公开/授权文献
- US20020089007A1 VERTICAL MOSFET 公开/授权日:2002-07-11
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