Patent ID: 7445674

Claim:
A crystallization apparatus comprising: a first optical modulation element which irradiates a non-single-crystal substance with a light beam which is to have a first light intensity distribution on the non-single crystal substance by modulating an intensity of an incident first light beam, thereby melting the non-single-crystal substance, the first light intensity distribution having a plurality of V-shaped intensity patterns; a second optical modulation element which irradiates the non-single-crystal substance with a light beam which is to have a second light intensity distribution substantially different from the first light intensity distribution on the non-single-crystal substance by modulating an intensity of an incident second light beam, thereby melting the non-single-crystal substance, the second light intensity distribution having a plurality of patterns each having a central peak shape; and a delay optical illumination system which causes the light beam having the second light intensity distribution to enter at least a portion of the molten part of the non-single-crystal substance that is generated by the light beam having the first light intensity distribution, before a temperature of the molten part is reduced to a temperature not more than a melting point.