Patent ID: 11973079
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A method for forming a semiconductor structure, the method comprising:
forming a stack of semiconductor layers over a semiconductor substrate, wherein the stack of semiconductor layers comprises a plurality of first semiconductor layers and a plurality of second semiconductor layers;
forming a first stack of masking layers over the stack of semiconductor layers with a first width and a second stack of masking layers laterally offset from the stack of semiconductor layers with a second width less than the first width;
forming a third stack of masking layers over the semiconductor substrate in a region laterally offset from the stack of semiconductor layers, wherein the third stack of masking layers has a third width different from the first width and the second width; and
performing a patterning process on the semiconductor substrate and the stack of semiconductor layers according to the first and second stacks of masking layers, thereby defining a first fin structure laterally adjacent to a second fin structure, wherein the first fin structure has the first width and the second fin structure has the second width, wherein the stack of semiconductor layers directly overlies the first fin structure and has the first width.