Invention Grant
- Patent Title: Semiconductor element with a single photon avalanche diode and method for manufacturing such semiconductor element
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Application No.: US15428070Application Date: 2017-02-08
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Publication No.: US09935231B2Publication Date: 2018-04-03
- Inventor: Georg Roehrer
- Applicant: ams AG
- Applicant Address: AT Unterpremstaetten
- Assignee: AMS AG
- Current Assignee: AMS AG
- Current Assignee Address: AT Unterpremstaetten
- Agency: McDermott Will & Emery LLP
- Priority: EP16154801 20160209
- Main IPC: H01L31/107
- IPC: H01L31/107 ; H01L31/0352 ; H01L31/18 ; G01T1/24 ; H01L27/146

Abstract:
A method for manufacturing a semiconductor element comprising a single photon avalanche diode having a multiplication zone (AR) a guard ring structure with a second type of electrical conductivity comprises providing a semiconductor wafer with a first region (R) comprising a semiconductor material with the first type of conductivity. The method further comprises generating by a first doping process a first well (W1) of the guard ring structure having a first vertical depth, the first well (W1) laterally surrounding the multiplication zone (AR) and having a lateral distance (A) from the multiplication zone (AR). The method further comprises generating by a second doping process a second well (W2) of the guard ring structure having a second vertical depth, the second well (W2) laterally surrounding and adjoining a part of the first region for laterally defining the multiplication zone (AR).
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