Patent ID: 7560321
Filing Date: 2009-07-14
Classification: H01L

Abstract:
1. A crystallization method comprising: (i) directly or through a base insulating film forming a non-single crystal semiconductor thin film on a substrate; (ii) forming an insulating film on the non-single crystal semiconductor thin film; (iii) irradiating the substrate with a laser light having a light intensity distribution of a plurality of inverse peak patterns continuous on an irradiation region of the insulating film; (iv) forming a crystal grain array, in which each crystal grain crystallized in a longer shape in a crystal growth direction than in a width direction is aligned adjacently in the width direction, on the non-single crystal semiconductor thin film; and (v) selecting a period T of the light intensity distribution in the range between 4 μm and 80 μm inclusive and controlling a light intensity gradient G.