Patent ID: 11908746
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 15:
16. A semiconductor device, comprising:
a plurality of semiconductor layers vertically separated from one another;
a gate structure that comprises a lower portion and an upper portion, wherein the lower portion wraps around each of the plurality of semiconductor layers;
a gate spacer that extends along a sidewall of the upper portion of the gate structure and has a bottom surface;
wherein a portion of the bottom surface of the gate spacer and a top surface of a topmost one of the plurality of semiconductor layers form an angle that is less than 90 degrees;
wherein the gate spacer comprises a plurality of dielectric layers;
wherein at least one of the plurality of dielectric layers has a tilted portion that forms the bottom surface of the gate spacer; and
wherein the tilted portion extends away from the sidewall of the upper portion of the gate structure.