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

Claim 14:
15. A method of fabricating a semiconductor device, comprising:
providing a substrate, wherein the substrate comprising a dense region and an isolation region;
forming a first metal layer over the substrate, wherein the first metal layer comprises:
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 of the first metal patterns comprises at least one slot; and
a second metal pattern located in the isolation region;

forming a dielectric layer on the first metal layer, to fill the at least one slot, such that the at least one of the first metal patterns comprises at least one dielectric portion therein; and
forming a second metal layer on the dielectric layer, the second metal layer comprising:
a third metal pattern located in the dense region; and
a fourth metal pattern located in the isolation region, wherein a thickness of the third metal pattern is less than a thickness of the fourth metal pattern.