Patent ID: 7369215

Claim:
A laser crystallization apparatus for applying a laser light to a non-single-crystal semiconductor to locally fuse the non-single-crystal semiconductor, the laser light having a light intensity distribution with an inverse peak shape and perform growth on crystal grains that are crystallized while being solidified, the apparatus comprising: a light source; a spatial intensity modulation optical element which modulates an intensity and a phase of the laser light from the light source; an illumination system which is provided between the light source and the spatial intensity modulation optical element, homogenizes a light intensity of the laser light from the light source and illuminates the spatial intensity modulation optical element with the homogenized light; a stage which supports a substrate on which the non-single-crystal semiconductor film is deposited; an image formation optical system having a plurality of optical members which is provided between the non-single-crystal semiconductor on the stage and the spatial intensity modulation optical element and forms an image of a laser light modulated by the spatial intensity modulation optical element at a desired part on the non-single-crystal semiconductor; a temperature adjustment portion which adjusts a temperature of the optical members by heating or cooling the optical members of the image formation optical system; a temperature sensor which detects a temperature of the optical members; and controlling means for relatively moving the stage and the image formation optical system along an optical axis of the image formation optical system based on a detected temperature from the temperature sensor, thereby adjusting a relative position of the image formation optical system and the non-single-crystal semiconductor, and causing the temperature adjustment portion to adjust a temperature of the optical members.