Patent ID: 7608148
Filing Date: 2009-10-27
Classification: C30B,Y10T

Abstract:
1. A crystallization apparatus comprising an illumination system which illuminates a phase shifter having at least one phase shift portion, and irradiates a polycrystal semiconductor film or an amorphous semiconductor film with a light beam having a predetermined light intensity distribution in which a light intensity is minimum in a point area corresponding to the phase shift portion of the phase shifter, thereby forming a crystallized semiconductor film, wherein the phase shifter has four or more even-numbered phase shift lines which intersect at a point constituting the phase shift portion, and an area on one side and an area on the other side of each phase shift line have a phase difference of approximately 180 degrees, and the phase shifter has a conformation that six or more triangular areas including said areas are arranged so as to be adjacent to each other with one apex in common.