发明申请
US20110042742A1 STRUCTURES OF AND METHODS OF FABRICATING TRENCH-GATED MIS DEVICES
审中-公开
制造TRENCH-GATED MIS装置的结构和方法
- 专利标题: STRUCTURES OF AND METHODS OF FABRICATING TRENCH-GATED MIS DEVICES
- 专利标题(中): 制造TRENCH-GATED MIS装置的结构和方法
-
申请号: US12917378申请日: 2010-11-01
-
公开(公告)号: US20110042742A1公开(公告)日: 2011-02-24
- 发明人: Anup Bhalla , Dorman Pitzer , Jacek Korec , Xiaorong Shi , Sik Lui
- 申请人: Anup Bhalla , Dorman Pitzer , Jacek Korec , Xiaorong Shi , Sik Lui
- 申请人地址: US CA Santa Clara
- 专利权人: VISHAY-SILICONIX
- 当前专利权人: VISHAY-SILICONIX
- 当前专利权人地址: US CA Santa Clara
- 主分类号: H01L29/78
- IPC分类号: H01L29/78
摘要:
In a trench-gated MIS device contact is made to the gate within the trench, thereby eliminating the need to have the gate material, typically polysilicon, extend outside of the trench. This avoids the problem of stress at the upper corners of the trench. Contact between the gate metal and the polysilicon is normally made in a gate metal region that is outside the active region of the device. Various configurations for making the contact between the gate metal and the polysilicon are described, including embodiments wherein the trench is widened in the area of contact. Since the polysilicon is etched back below the top surface of the silicon throughout the device, there is normally no need for a polysilicon mask, thereby saving fabrication costs.
公开/授权文献
- US09324858B2 Trench-gated MIS devices 公开/授权日:2016-04-26
信息查询
IPC分类: