Patent ID: 11887979
Assignee: CSMC TECHNOLOGIES FAB2 CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The method of claim 10, wherein after the step of forming the Zener diode well region in the first well and prior to the step of forming, by lithographing and doping, respectively the first doped region, the second doped region, the third doped region, the fourth doped region, and the fifth doped region, the method further comprises a step of forming isolation structures, the isolation structures are adapted to isolate the first doped region and the second doped region from each other, to isolate the third doped region and the fourth doped region from each other, and to isolate the fourth doped region and the fifth doped region from each other.