Invention Grant
- Patent Title: Electrostatic protection structure and electrostatic protection circuit
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Application No.: US17790462Application Date: 2022-03-23
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Publication No.: US12027846B2Publication Date: 2024-07-02
- Inventor: Yingtao Zhang , Pan Mao , Junjie Liu , Lingxin Zhu , Bin Song , Qian Xu , Tieh-Chiang Wu
- Applicant: ChangXin Memory Technologies, Inc.
- Applicant Address: CN Hefei
- Assignee: ChangXin Memory Technologies, Inc.
- Current Assignee: ChangXin Memory Technologies, Inc.
- Current Assignee Address: CN Hefei
- Agency: Kilpatrick Townsend & Stockton LLP
- Priority: CN 2210021740.8 2022.01.10
- International Application: PCT/CN2022/082409 2022.03.23
- International Announcement: WO2023/130589A 2023.07.13
- Date entered country: 2022-06-30
- Main IPC: H02H9/02
- IPC: H02H9/02 ; H01L27/02

Abstract:
Embodiments of the present disclosure relate to an electrostatic protection structure and an electrostatic protection circuit. The electrostatic protection structure includes: a SCR structure and a trigger structure; the SCR structure includes: a well region of a second conductivity type and a first well of a first conductivity type region, a first-doped region of the first conductivity type, and a first-doped region of the second conductivity type; the trigger structure includes: a first-doped region of the second conductivity type, a second well region of the first conductivity type, a second-doped region of two conductivity types, a third-doped region of the second conductivity type, a fourth-doped region of the second conductivity type, and a first gate electrode. The electrostatic protection structure weakens the positive feedback of the parasitic transistor in the SCR device, improves the anti-latch capability of the device, realizes stronger protection capability, and enhances the reliability of the circuit.
Public/Granted literature
- US20240170952A1 Electrostatic Protection Structure and Electrostatic Protection Circuit Public/Granted day:2024-05-23
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