Patent ID: 11949023
Assignee: STMICROELECTRONICS (TOURS) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A device, comprising:
a substrate;
an anode in the substrate, the anode including:
a guard ring in the substrate, the guard ring has a first doping level;
a first doped region in the guard ring, the first doped region having first and second sides opposite to each other and a second doping level different from the first doping level, the guard ring extending along the first side of the first doped region, between the first and second sides of the first doped region, and along the second side of the first doped region;
a second doped region in the first doped region, the second doped region having first and second sides opposite to each other and a third doping level that is different from the second doping level, the first doped region extending along the first side of the second doped region, between the first and second sides of the second doped region, and along the second side of the second doped region.