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

Claim 18:
19. The method of fabricating the semiconductor device according to claim 18, wherein a method of forming the second metal layer comprises:
forming a second metal material layer on the dielectric layer;
patterning the second metal material layer to form the second metal layer;
forming a passivation material layer on the third metal pattern and the fourth metal pattern;
performing a first chemical mechanical polishing process on the passivation material layer;
after performing the first chemical mechanical polishing process, performing an etch back process on the passivation material layer to expose a top surface of the third metal pattern, wherein after performing the etch back process, the passivation material layer remains on a top surface of the fourth metal pattern; and
after performing the etch back process, performing a second chemical mechanical polishing process on the third metal pattern and the passivation material layer to expose the top surface of the fourth metal pattern and to form a passivation layer, wherein the passivation layer is disposed between the third metal pattern and the fourth metal pattern.