Patent ID: 11942367
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A semiconductor device comprising:
gate spacers over a semiconductor fin;
a first gate stack adjacent to the gate spacers;
a second gate stack over the semiconductor fin;
a capping layer located over the first gate stack, the capping layer extending from a first one of the gate spacers to a second one of the gate spacers;
a first sacrificial material over the capping layer and over the second gate stack, wherein the first sacrificial material comprises zirconium oxide;
a first conductive material and a second sacrificial material in a region between the first gate stack and the second gate stack and between the first sacrificial material over the first gate stack and the first sacrificial material over the second gate stack, wherein the second sacrificial material is different from the first sacrificial material;
a gate contact extending through the first sacrificial material;
a source/drain contact extending through the second sacrificial material; and
a helmet material over the first sacrificial material, wherein the helmet material has a chlorine-based dry etch selectivity to the first sacrificial material of greater than about 12.