Patent ID: 11915981
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A semiconductor device, comprising:
a substrate;
a first gate structure over the substrate, wherein the first gate structure comprises:
a first gate dielectric; and
a first work function metal (WFM) layer over the first gate dielectric; and

a second gate structure over the substrate, wherein the second gate structure comprises:
a second gate dielectric;
a second WFM layer over the second gate dielectric; and
a filling metal over the second WFM layer;

first gate spacers on opposite sidewalls of the first gate structure;
second gate spacers on opposite sidewalls of the second gate structures;
first and second tungsten layers spanning over the first and second gate structures, respectively; and
first and second contact plugs extending through the first and second tungsten layers, respectively, wherein the first contact plug is in contact with the first WFM layer, and the second contact plug is in contact with the filling metal.