发明申请
US20060141701A1 Semiconductor device having trench capacitors and method for making the trench capacitors
审中-公开
具有沟槽电容器的半导体器件和用于制造沟槽电容器的方法
- 专利标题: Semiconductor device having trench capacitors and method for making the trench capacitors
- 专利标题(中): 具有沟槽电容器的半导体器件和用于制造沟槽电容器的方法
-
申请号: US11359573申请日: 2006-02-23
-
公开(公告)号: US20060141701A1公开(公告)日: 2006-06-29
- 发明人: Shigehiko Saida , Kiyotaka Miyano , Takashi Nakao
- 申请人: Shigehiko Saida , Kiyotaka Miyano , Takashi Nakao
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 优先权: JP2003-030795 20030207
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
A semiconductor device having a trench capacitor is disclosed. The trench is formed on the surface of a semiconductor substrate. A first insulating film is formed on the side wall of the trench and a semiconductor film is buried in the trench. The first insulating film and the semiconductor film located in the upper part of the trench are etched and a second insulating film is deposited on the exposed side wall. The semiconductor film and the first insulating film are etched and a plate electrode is formed on the exposed side wall. A capacitor insulating film is formed on the plate electrode and a storage electrode is buried within the trench. The structure provides a semiconductor device having fewer memory cell defects.
信息查询
IPC分类: