Patent ID: 9659930
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a first fin field-effect transistor (Fin FET) including a first fin structure extending in a first direction and a first gate structure, the first gate structure including a first gate dielectric layer formed over the first fin structure and a first gate electrode layer formed over the first gate dielectric layer and extending in a second direction perpendicular to the first direction; and a second Fin FET including a second fin structure extending in the first direction and a second gate structure, the second gate structure including a second gate dielectric layer formed over the second fin structure and a second gate electrode layer formed over the second gate dielectric layer and extending in the second direction, wherein: the first gate structure and the second gate structure are aligned along the second direction, the first gate structure and the second gate structure are separated by a separation plug made of an insulating material, a width of the separation plug in the first direction is smaller than a width of the first gate structure in the first direction, in plan view, and in plan view, the first and second gate structures and the separation plug are disposed, along the first direction, between sidewall spacer layers and an additional insulating layer.