Patent ID: 7662677
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device comprising the steps of: selecting a wavelength for a laser beam such that the laser beam is absorbed more by an amorphous semiconductor film than by a crystalline semiconductor film; forming an amorphous semiconductor film having an upper surface; forming a first crystalline region by irradiating a laser beam having the selected wavelength to a first region of the upper surface of the amorphous semiconductor film by relatively moving the laser beam in a first direction with respect to the first region of the amorphous semiconductor film; and after forming the first crystalline region, forming a second crystalline region by irradiating the laser beam having the selected wavelength to a second region of the upper surface of the amorphous semiconductor film including a portion of the first crystalline region by relatively moving the laser beam in a direction parallel to the first direction with respect to the second region of the amorphous semiconductor film; wherein: