Patent ID: 7311771
Filing Date: 2007-12-25
Classification: B23K,G02B,H01L

Abstract:
1. A crystallization apparatus which generates a crystallized semiconductor film by irradiating at least one of a polycrystal semiconductor film and an amorphous semiconductor film with light beams having a predetermined light intensity distribution, comprising: an irradiation system which is used to irradiate at least one of the polycrystal semiconductor film or the amorphous semiconductor film with light beams having a light intensity distribution with an inverse peak pattern that a light intensity is increased toward the periphery from an inverse peak at which the light intensity is minimum, wherein a light intensity value α(standardized value) of the inverse peak when a maximum value of the light intensity in the light intensity distribution with the inverse peak pattern is standardized as 1 is selected within a range of 0.2≦value α≦0.8 by irradiating over the light intensity distribution with an inverse peak pattern, light beams having a substantially homogeneous light intensity distribution.