Patent ID: 11916071
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device comprising:
a first semiconductor fin on a substrate;
a second semiconductor fin next to the first semiconductor fin, the first semiconductor fin having a first side facing the second semiconductor fin and a second side facing away from the second semiconductor fin, the second semiconductor fin having a first side facing the first semiconductor fin and a second side facing away from the first semiconductor fin;
a first epitaxy structure on the first semiconductor fin, wherein the first epitaxy structure laterally extends a first width from the first side of the first semiconductor fin toward the second semiconductor fin, and a second width from the second side of the first semiconductor fin in a direction away from the second semiconductor fin, and the first width of the first epitaxy structure is greater than the second width of the first epitaxy structure;
a second epitaxy structure on the second semiconductor fin, wherein the second epitaxy structure laterally extends a first width from the first side of the second semiconductor fin toward the first semiconductor fin, and a second width from the second side of the second semiconductor fin in a direction away from the first semiconductor fin, and the first width of the second epitaxy structure is greater than the second width of the second epitaxy structure;
a first fin sidewall spacer adjacent the first side of the first semiconductor fin; and
a second fin sidewall spacer adjacent the second side of the first semiconductor fin and having a top end higher than a top end of the first fin sidewall spacer.