Patent ID: 7151016
Filing Date: 2006-12-19
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, said method comprising: forming a first insulating film over a substrate; forming a semiconductor film over the first insulating film; forming a second insulating film over the semiconductor film; forming a first conductive film over the second insulating film; forming a second conductive film over the first conductive film; first etching the first conductive film, the second conductive film, and a portion of the second insulating film to form a thin portion and a thick portion of the second insulating film; second etching the first conductive film and the second conductive film etched in the first etching step to form a gate electrode having the first conductive film and the second conductive film; first introducing a hydride having an n-type impurity element or a hydride having a p-type impurity element into the semiconductor film through the thin portion of the second insulating film using the first conductive film as a mask at a first acceleration voltage by a plasma doping technique or an ion doping technique after the second etching step; second introducing the hydride having an n-type impurity element or the hydride having a p-type impurity element into the semiconductor film through the first conductive film and the second insulating film using the second conductive film as a mask at a second acceleration voltage so that an H concentration depth profile peak due to H performing a thermal treatment by a laser annealing technique or a RTA technique, or a hydrogenating treatment, wherein the H concentration depth profile peak is not located in the semiconductor film below the gate electrode.