Patent ID: 10460996

Abstract:
A fin field effect transistor (FinFET) and a method for fabricating the FinFET are provided. The method includes providing a plurality of discrete fins on a semiconductor substrate, and forming a dummy gate across a length portion of the fins and covering portions of top and sidewall surfaces of the fins. The method also includes forming an interlayer dielectric layer, covering the dummy gate and the fins, and forming an opening in the interlayer dielectric layer. In addition, the method includes forming a gate dielectric layer in the opening and on the interlayer dielectric layer, and forming a barrier layer on the gate dielectric layer. Moreover, the method includes removing the gate dielectric layer and the barrier layer from the interlayer dielectric layer, and performing an annealing treatment. Further, the method includes removing the barrier layer in the opening, and forming a metal gate in the opening.