Patent ID: 6388812
Filing Date: 2002-05-14
Classification: B23K,G02B,H01L

Abstract:
A method for forming a semiconductor device comprising:forming a semiconductor film comprising silicon to become at least a channel formation region over a substrate; irradiating a linear laser light to said semiconductor film; homogenizing energy density of said linear laser light in the longitudinal direction thereof by a homogenizer; and forming a gate electrode adjacent to said semiconductor film with a gate insulating film therebetween, wherein length of said linear laser light in the longitudinal direction thereof, as an abscissa, and the number of cylindrical lenses of said homogenizer, as an ordinate, are set in the range defined by coordinates represented by (100, 7), (700, 50), (700, 140), and (100, 20) where said length of said linear laser light is measured in millimeters.