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

Claim 8:
9. A semiconductor device, comprising:
a fin structure disposed over a substrate, wherein the fin structure includes a plurality of semiconductor layers;
a gate structure that comprises a lower portion and an upper portion, wherein the lower portion straddles the fin structure;
a gate spacer that extends along a sidewall of the upper portion of the gate structure and comprises a vertical portion and tilted portion, wherein the vertical portion is in contact with the sidewall and the tilted portion overlays at least a first portion of a top surface of a topmost one of the plurality of semiconductor layers; and
an etch stop layer extending between the tilted portion and a second portion of the top surface of the topmost semiconductor layer that is not overlaid by the tilted portion.