Patent ID: 9728623
Date: 2017-08-08
CPC Classifications: H01L

Claim:
1. A replacement metal gate transistor comprising: a trench having a bottom, a first sidewall and a second sidewall; a dielectric layer disposed in the trench, the dielectric layer having a bottom section disposed on the bottom of the trench and sidewall sections disposed on the first and second sidewalls, the bottom section having a top surface defining a plane; a metal layer disposed in the trench, the metal layer having a bottom section disposed on the bottom section of the dielectric layer and sidewall sections disposed on the sidewall sections of the dielectric layer, wherein the sidewall sections of the metal layer extend partially up the sidewall sections of the dielectric layer such that at least a portion of the sidewall sections of the dielectric layer extend a perpendicular distance from the plane that is further from the plane than a farthest perpendicular distance from the plane to which any portion of the metal layer extends; and a contact layer disposed on, and in direct contact with each of, the bottom section of the metal layer, the sidewall sections of the metal layer, and portions of the sidewall sections of the dielectric layer that are not covered by the metal layer.