Invention Grant
- Patent Title: Semiconductor device having junction termination structure and method of formation
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Application No.: US17679641Application Date: 2022-02-24
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Publication No.: US11652167B2Publication Date: 2023-05-16
- 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
- Agency: KDW Firm PLLC
- The original application number of the division: US16686180 2019.11.17
- Main IPC: H01L29/78
- IPC: H01L29/78 ; H01L29/66 ; H01L29/739

Abstract:
A power semiconductor device may include a junction termination region, bounded by a side edge of a semiconductor substrate. The junction termination region may include a substrate layer of a first dopant type, a well layer of a second dopant type, a conductive trench assembly having a first set of conductive trenches, in the junction termination region, and extending from above the substrate layer through the well layer; and a metal layer, electrically connecting the conductive trench assembly to the well layer. The metal layer may include a set of inner metal contacts, electrically connecting a set of inner regions of the well layer to a first set of trenches of the conductive trench assembly; and an outer metal contact, electrically connecting an outer region of the well layer to a second set of conductive trenches of the conductive trench assembly, wherein the outer region borders the side edge.
Public/Granted literature
- US20220254921A1 SEMICONDUCTOR DEVICE HAVING JUNCTION TERMINATION STRUCTURE AND METHOD OF FORMATION Public/Granted day:2022-08-11
Information query
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