Patent ID: 7135390
Filing Date: 2006-11-14
Classification: B23K,H01L

Abstract:
1. A method of fabricating a semiconductor device, said method comprising: emitting a laser beam from a laser oscillator; dividing said laser beam into at least first and second laser beams having a difference in an optical path length larger than a coherence length of said laser beam in a longitudinal direction; overlapping the first and second laser beams to homogenize the first and second laser beams at an irradiation surface of a semiconductor film; converging the first and second laser beams in a width direction of the first and second laser beams to irradiate the first and second laser beams at the irradiation surface, said first and second laser beams having a linear shape in a cross section at the irradiation surface; crystallizing said semiconductor film by the irradiation of the converged first and second laser beams.