Patent ID: 11923437
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
forming a first semiconductor fin and a second semiconductor fin protruding higher than isolation regions, wherein the isolation regions are on opposing sides of the first semiconductor fin and the second semiconductor fin;
determining a first target width of the first semiconductor fin and a second target width of the second semiconductor fin;
performing a first thinning process on the first semiconductor fin to achieve the first target width, wherein in the first thinning process, both of the first semiconductor fin and the second semiconductor fin are thinned, and the first semiconductor fin is thinned more than the second semiconductor fin; and
performing a second thinning process on the second semiconductor fin to achieve the second target width, wherein in second thinning process, both of the first semiconductor fin and the second semiconductor fin are thinned, and the second semiconductor fin is thinned more than the first semiconductor fin.