Patent ID: 6573161
Filing Date: 2003-06-03
Classification: H01L

Abstract:
A fabrication process of a thin film semiconductor device comprising a step of irradiating pulsed laser light on a semiconductor film:wherein said semiconductor film includes amorphous silicon and crystalline silicon, said pulsed laser light has a wavelength of 370-710 nm so that said pulsed laser light is selective absorbed by said amorphous silicon and said amorphous silicon is selectively melted, and an irradiation energy density of said pulsed laser light is distributed in a Gaussian profile in a direction of a width of an essentially rectangular irradiation region of said pulsed laser light irradiated on said semiconductor film so that temperature in said semiconductor film is distributed in said direction of said width of said irradiation region and said melted amorphous silicon is crystallized in said direction of said width of said irradiation region.