Invention Grant
- Patent Title: Method for producing a buried cavity structure
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Application No.: US16029237Application Date: 2018-07-06
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Publication No.: US10784147B2Publication Date: 2020-09-22
- Inventor: Ines Uhlig , Kerstin Kaemmer , Norbert Thyssen
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Neubiberg
- Agency: Slater Matsil, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2c8bffbb
- Main IPC: H01L21/762
- IPC: H01L21/762 ; H01L21/768 ; H01L21/3105 ; H01L21/306 ; H01L21/3065

Abstract:
In accordance with an embodiment, a method for producing a buried cavity structure includes providing a mono-crystalline semiconductor substrate, producing a doped volume region in the mono-crystalline semiconductor substrate, wherein the doped volume region has an increased etching rate for a first etchant by comparison with an adjoining, undoped or more lightly doped material of the monocrystalline semiconductor substrate, forming an access opening to the doped volume region, and removing the doped semiconductor material in the doped volume region using the first etchant through the access opening to obtain the buried cavity structure.
Public/Granted literature
- US20190027399A1 METHOD FOR PRODUCING A BURIED CAVITY STRUCTURE Public/Granted day:2019-01-24
Information query
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