Patent ID: 9564440
Date: 2017-02-07
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: an n-type finFET including a first gate electrode comprised of a titanium and carbon containing layer, a titanium and nitrogen containing layer and a tungsten fill present on a channel portion of a first fin structure, the first gate electrode including a first portion with a first width present on a gate dielectric, and a second portion with a second width present on the first portion, in which the second width is greater than the first width, the n-type semiconductor finFET including a composite spacer including a first portion of a first material in contact with the first portion of the first gate electrode, and a second portion of a second material in contact with the second portion of the first gate electrode; and a p-type finFET including a second gate electrode comprised of a titanium and nitrogen containing layer and a tungsten fill present on a channel portion of a second fin structure, the second gate electrode including a first portion with a first width present on a gate dielectric, and a second portion with a second width present on the first portion, in which the second width is greater than the first width, the p-type semiconductor finFET including a composite spacer including a first portion of a first material in contact with the first portion of the second gate electrode, and a second portion of a second material in contact with the second portion of the second gate electrode.