Patent ID: 9634122
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. An integrated circuit (IC) including one or more field-effect transistor devices, a field effect transistor device comprising: source/drain regions disposed in an active region of a semiconductor substrate and separated from one another along a first direction by a channel region; a shallow trench isolation (STI) region, which has an upper STI surface, laterally surrounding the active region, wherein the STI region includes trench regions, which have lower trench surfaces below the upper STI surface and which extend from opposite sides of the channel region in a second direction which intersects the first direction, wherein sidewalls of the trench regions are tapered so openings at upper regions of the trench regions have widths which are larger than openings at lower regions of the trench regions; and a metal gate electrode extending in the second direction, the metal gate electrode having lower portions which are disposed in the trench regions and which are separated from one another by the channel region, and having an upper portion bridging over the channel region to couple the lower portions to one another.