Patent ID: 7615431
Filing Date: 2009-11-10
Classification: G03F,H01L

Abstract:
1. A manufacturing method of a semiconductor device comprising at least two types of transistors in which film thicknesses of gate insulating films are different, the manufacturing method comprising: forming a first gate insulating film above a semiconductor substrate; applying a thinner on a surface of the first gate insulating film; forming a resist pattern above the first gate insulating film on which the thinner has been applied; etching the first gate insulating film with the resist pattern being a mask, to remove a part of the first gate insulating film; and forming a second gate insulating film to form a region in which only the second gate insulating film is formed and a region in which at least the first and second gate insulating films are stacked, wherein a dose of the thinner applied per unit area is 6×10