Patent ID: 11862673
Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device comprising:
a buried oxide layer disposed on a substrate;
a first region disposed on the buried oxide layer;
a first ring region disposed in the first region, the first ring region comprising a portion of a guarding;
a first terminal region disposed in the first ring region, the first terminal region being connected to an anode;
a second ring region disposed in the first region;
a second terminal region disposed in the second ring region, the second to region being connected to a cathode;
wherein the first region has a graded doping concentration;
wherein the first region, the second ring region, and the second terminal region have a first conductivity type;
wherein the first ring region and the first terminal region have a second conductivity type; and
wherein the first conductivity type is different from the second conductivity type; wherein the first region comprises a plurality of concentric ring portions, and wherein the doping concentration of the first region increases in a radial direction from a center ring portion to a perimeter ring portion.