Patent ID: 11908909
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A semiconductor device, comprising:
an active region;
an epitaxial source/drain within and extending above the active region;
an insulation layer adjacent to the active region;
a plurality of dielectric layers that each reside above the insulation layer;
a first layer stack residing above the active region and in one or more of the plurality of dielectric layers; and
a second layer stack residing above the epitaxial source/drain and in the one or more of the plurality of dielectric layers,
wherein each of the first layer stack and the second layer stack comprises:
a first titanium layer residing on a bottom of each of the first layer stack and the second layer stack and on a portion of sides of each of the first layer stack and the second layer stack,
a second titanium layer and a first metal layer that each reside on the first titanium layer,
a second metal layer residing on the second titanium layer and the first metal layer, and
a tungsten layer residing on the second metal layer.