Invention Grant
- Patent Title: Method of forming wide trenches using a sacrificial silicon slab
- Patent Title (中): 使用牺牲硅板形成宽沟槽的方法
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Application No.: US13673033Application Date: 2012-11-09
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Publication No.: US09034764B2Publication Date: 2015-05-19
- Inventor: Gary O'Brien
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot Moore & Beck LLP
- Main IPC: H01L21/311
- IPC: H01L21/311 ; B81C1/00

Abstract:
A method of forming an encapsulated wide trench includes providing a silicon on oxide insulator (SOI) wafer, defining a first side of a first sacrificial silicon slab by etching a first trench in a silicon layer of the SOI wafer, defining a second side of the first sacrificial silicon slab by etching a second trench in the silicon layer, forming a first sacrificial oxide portion in the first trench, forming a second sacrificial oxide portion in the second trench, forming a polysilicon layer above the first sacrificial oxide portion and the second sacrificial oxide portion, and etching the first sacrificial oxide portion and the second sacrificial oxide portion.
Public/Granted literature
- US20130115775A1 METHOD OF FORMING WIDE TRENCHES USING A SACRIFICIAL SILICON SLAB Public/Granted day:2013-05-09
Information query
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