Patent ID: 7001461
Filing Date: 2006-02-21
Classification: B23K,G02B,G03F,H01L,Y10T

Abstract:
1. A crystallization apparatus comprising: an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film; a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from said illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of said non-single-crystal semiconductor film containing an axis corresponding to said boundary; said phase shifter further including a small region which extends into at least one of said first and second regions from said boundary and transmits the illumination light from the illumination system by a second phase retardation with respect to said at least one of said first and second regions.