Patent ID: 8865552
Filing Date: 2014-10-21
Classification: H01L

Abstract:
1. A method for forming a fin field effect transistor, comprising: providing a semiconductor substrate; forming a dielectric layer and a fin on the semiconductor substrate, wherein the fin is a protruded fin formed throughout an entire thickness of the dielectric layer, and the protruded fin has a top surface higher than a top surface of the dielectric layer; after forming the protruded fin, annealing the protruded fin using a hydrogen-containing gas and a repairing gas containing at least an element corresponding to a material of the fin, such that the top surface and each sidewall of the fin are sufficiently annealed to add the element corresponding to the material of the fin in the repairing gas into both the top surface and each sidewall surface of the fin; and forming a gate structure on the top surface of the dielectric layer and at least on sidewalls of a length portion of the fin after the annealing process.