Patent ID: 7470602

Claim:
A polycrystalline film manufacture method comprising steps of: (a) preparing a workpiece object having a thin film formed on a surface of the workpiece object and made of amorphous material; (b) applying at least one shot of a pulse laser beam to the thin film, the pulse laser beam having an elongated beam cross section along one direction on a surface of the thin film and having a light intensity distribution along a short axis of a beam cross section which distribution has an asymmetric first shape that the light intensity distribution is strong in a central area and weakens toward borders; (c) moving at least one of an incidence position of the pulse laser beam and the workpiece object in such a manner that the incidence position of the pulse laser beam moves along a direction crossing a long axis direction of the beam cross section of the pulse laser beam, on the surface of the thin film, and that a region applied with one shot of the pulse laser beam partially overlaps a region applied with a preceding one shot of the pulse laser beam; (d) applying at least one shot of the pulse laser beam to the thin film, the pulse laser beam having the light intensity distribution of the asymmetric first shape; and (e) repeating the step (c) and the step (d) alternately.