Patent ID: 8716113
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. A crystalline semiconductor film manufacturing method comprising: forming a metal layer above a substrate; forming a plurality of gate electrodes by patterning the metal layer such that each of pixels arranged in a matrix includes at least one of the gate electrodes; forming a gate insulating film on the gate electrodes; forming an amorphous semiconductor film on the gate insulating film; and forming a crystalline semiconductor film by irradiating or by scanning the amorphous semiconductor film with a predetermined laser beam, so as to crystallize the amorphous semiconductor film, wherein a laser irradiation width that is a width of the predetermined laser beam for the scanning corresponds to n times a width of the pixel where n is an integer equal to or above 2, a laser energy intensity is higher in one end portion of the laser irradiation width than in the other end portion of the laser irradiation width, and in the forming of a crystalline semiconductor film, the laser energy intensity of the predetermined laser beam is inverted in increments of n pixels, alternately between the one end portion and the other end portion of the laser irradiation width.