Patent ID: 11916145
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 9:
10. A method, comprising:
forming a stack of semiconductor layers on a substrate, wherein the stack of semiconductor layers comprises:
first and second sets of semiconductor layers stacked in an alternate configuration;
an intermediate semiconductor layer on the first and second sets of semiconductor layers;
a substrate layer on the intermediate semiconductor layer; and
a capping semiconductor layer on the substrate layer;

forming an opening in the stack of semiconductor layers, wherein the opening separates the stack of semiconductor layers into more than one stacks of semiconductor layers;
forming inner spacers structures on opposite ends of the second set of semiconductor layers and opposite ends of the capping semiconductor layer;
replacing the intermediate semiconductor layer with an isolation structure; and
filling the opening with source/drain (S/D) regions.