Patent ID: 11908796
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A semiconductor device, comprising:
a substrate comprising a dense region and an isolation region;
a first metal layer disposed over the substrate and comprising:
a plurality of first metal patterns located in the dense region, wherein the first metal patterns are separated from each other; and
at least one second metal pattern located in the isolation region;

a dielectric layer disposed on the first metal layer, wherein the dielectric layer has a first top surface in the dense region and a second top surface in the isolation region, and the first top surface is higher than the second top surface, and a portion of the dielectric layer is disposed in at least one of the first metal patterns; and
a second metal layer disposed on the dielectric layer and comprising:
a third metal pattern located on the first top surface; and
a fourth metal pattern located on the second top surface, wherein a top surface of the third metal pattern is substantially flush with a top surface of the fourth metal pattern, and the second metal layer is in direct contact with the dielectric layer.