Patent ID: 11955389
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A structure comprising:
a semiconductor substrate;
a heavily doped semiconductor region extending into the semiconductor substrate, wherein the heavily doped semiconductor region is of n-type, and wherein the heavily doped semiconductor region forms a partial guard ring;
an active region having a first spacing from a nearest first portion of the partial guard ring, and a second spacing from a nearest second portion of the partial guard ring, wherein both of the first spacing and the second spacing are smaller than about 2 μm, and wherein the partial guard ring partially surrounds the active region from at least two sides of the active region; and
a P-type Metal-Oxide-Semiconductor (PMOS) device formed based on the active region.