Patent ID: 6521492
Filing Date: 2003-02-18
Classification: H01L

Abstract:
A method of fabricating on a substrate a thin film semiconductor device that employs as the active layer a crystalline semiconductor film composed primarily of silicon (Si), the method comprising:a semiconductor film formation step in which an amorphous semiconductor film composed primarily of silicon (Si) is deposited on a substrate; a solid phase crystallization step in which said amorphous semiconductor film is crystallized in the solid phase to yield a solid phase crystallization film containing a crystalline component and non-crystalline component; and a laser irradiation step in which a pulsed laser beam irradiates said solid phase crystallization film to yield a crystalline semiconductor film; wherein the wavelength of said pulse laser beam is 370 nm or more and 710 nm or less, and an absorption coefficient of the laser beam of this wavelength range in the non-crystalline component is larger than an absorption coefficient in the crystalline component.