Invention Grant
- Patent Title: Method of manufacturing a power semiconductor device
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Application No.: US16235726Application Date: 2018-12-28
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Publication No.: US10529809B2Publication Date: 2020-01-07
- Inventor: Matthias Kuenle , Daniel Schloegl , Hans-Joachim Schulze , Christoph Weiss
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Neubiberg
- Agency: Murphy, Bilak & Homiller, PLLC
- Priority: DE102016111844 20160628
- Main IPC: H01L29/36
- IPC: H01L29/36 ; H01L29/78 ; H01L29/739 ; H01L29/861 ; H01L29/10 ; H01L29/08 ; H01L21/265 ; H01L29/66

Abstract:
A method of manufacturing a power semiconductor device includes: creating a doped contact region on top of a surface of a carrier; creating, on top of the contact region, a doped transition region having a maximum dopant concentration of at least 0.5*1015 cm−3 for at least 70% of a total extension of the doped transition region in an extension direction and a maximal dopant concentration gradient of at most 3*1022 cm−4, wherein a lower subregion of the doped transition region is in contact with the contact region and has a maximum dopant concentration at least 100 times higher than a maximum dopant concentration of an upper subregion of the doped transition region; and creating a doped drift region on top of the upper subregion of the doped transition region, the doped drift region having a lower dopant concentration than the upper subregion of the doped transition region.
Public/Granted literature
- US20190157401A1 Method of Manufacturing a Power Semiconductor Device Public/Granted day:2019-05-23
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