公开(公告)号：US20220302104A1

公开(公告)日：2022-09-22

申请号：US17639076

申请日：2020-08-06

Applicant: CSMC TECHNOLOGIES FAB2 CO., LTD.

Inventor： Danye LIANG ,  Guangyang WANG

IPC: H01L27/02

Abstract: In one aspect, a bidirectional Electro-Static Discharge (ESD) protection device includes: a first well region, a second well region and a third well region formed in a semiconductor substrate; two or more first injection regions and two or more second injection regions formed in the first well region, and two or more fourth injection regions and two or more fifth injection regions formed in the second well region; and third injection regions formed at a junction of the first well region and the third well region and at a junction of the second well region and the third well region.