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

Claim 17:
18. A method for forming a semiconductor structure, the method comprising:
depositing a stack of semiconductor layers over a semiconductor substrate;
forming a first stack of masking layers over the stack of semiconductor layers;
forming a second stack of masking layers over the semiconductor substrate, wherein the second stack of masking layers are laterally offset from the stack of semiconductor layers, wherein a first width of the first stack of masking layers is different from a second width of the second stack of masking layers;
performing a first patterning process on the semiconductor substrate and the stack of semiconductor layers to define a fin structure in the semiconductor substrate, wherein the stack of semiconductor layers has the first width and the fin structure has the second width;
performing a second patterning process on the stack of semiconductor layers and the fin structure in an isolation region of the semiconductor substrate, wherein the fin structure and the stack of semiconductor layers are removed from the isolation region; and
forming a gate structure that continuously extends from the fin structure to the stack of semiconductor layers.