Patent ID: 11973080
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure, comprising:
a first portion of a first-type substrate doped to form a deep second-type well in the first-type substrate;
a second portion of the first-type substrate doped to form a first-type well;
a third portion of the first-type substrate doped to form a first second-type well over the deep-second-type well, wherein the deep-second-type well and the first second-type well form an enclosed space that includes the first-type well, and wherein dopant concentrations of the deep-second-type well and the first second-type well are different;
a second-type contact region at a top surface of the first second-type well and having a dopant concentration higher than the dopant concentration of the first second-type well;
a first embedded semiconductor region (ESR) in the enclosed space and abutting opposite sides of the first-type well, wherein the first ESR is intrinsic;
a fourth portion of the first-type substrate doped to form a second second-type well over the deep second-type well; and
a second ESR abutting the first second-type well and the second second-type well.