Patent ID: 11862675
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. An integrated circuit (IC) comprising:
a substrate;
a termination device well having a first doping type in the substrate;
a high side well overlying the termination device well and having a second doping type opposite the first doping type in the substrate, wherein the high side well has a sidewall boundary directly contacting the termination device well continuously in a first closed path;
a switching device overlying the substrate at a lateral recess in the high side well;
a peripheral well having the second doping type in the substrate, and separating and individually surrounding the switching device and the termination device well; and
a pair of contact regions respectively on the termination device well and the high side well and respectively having the first and second doping types in the substrate, wherein the contact regions extend in individual second closed paths;
wherein the sidewall boundary is laterally between the contact regions continuously along an entirety of the first closed path, and wherein a separation between the contact regions is substantially the same on opposite sides of the high side well.