Patent ID: 8563415
Filing Date: 2013-10-22
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising; providing a semiconductor substrate having a first region and a second region, wherein the doping type of the first region is different from the doping type of the second region; forming an interface layer on the semiconductor substrate; forming a gate dielectric layer on the interface layer; forming a first work function metal gate layer belonging to the first region and a second work function metal gate layer belonging to the second region on the gate dielectric layer, respectively; forming an oxygen molecule catalyzing layer on the first and second work function metal gate layers; annealing the device to decompose oxygen molecules into oxygen atoms in annealing environment, wherein the oxygen atoms are diffused into the gate dielectric to supplement oxygen vacancies and defects; forming a polysilicon layer on the oxygen molecule catalyzing layer; and processing the device to form a first gate belonging to the first region and a second gate belonging to the second region, respectively.