Invention Grant
- Patent Title: Charge carrier extraction inverse diode
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Application No.: US15693392Application Date: 2017-08-31
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Publication No.: US10424677B2Publication Date: 2019-09-24
- Inventor: Kyoung Wook Seok
- Applicant: Littelfuse, Inc.
- Applicant Address: US IL Chicago
- Assignee: Littelfuse, Inc.
- Current Assignee: Littelfuse, Inc.
- Current Assignee Address: US IL Chicago
- Main IPC: H01L29/861
- IPC: H01L29/861 ; H01L29/66 ; H01L29/06 ; H01L29/40 ; H01L23/31

Abstract:
An inverse diode die is “fast” (i.e., has a small peak reverse recovery current) due to the presence of a novel topside P+ type charge carrier extraction region and a lightly-doped bottomside transparent anode. During forward conduction, the number of charge carriers in the N− type drift region is reduced due to holes being continuously extracted by an electric field set up by the P+ type charge carrier extraction region. Electrons are extracted by the transparent anode. When the voltage across the device is then reversed, the magnitude of the peak reverse recovery current is reduced due to there being a smaller number of charge carriers that need to be removed before the diode can begin reverse blocking mode operation. Advantageously, the diode is fast without having to include lifetime killers or otherwise introduce recombination centers. The inverse diode therefore has a desirably small reverse leakage current.
Public/Granted literature
- US20190067493A1 Charge Carrier Extraction Inverse Diode Public/Granted day:2019-02-28
Information query
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