Patent ID: 8742289

Claim:
A laser lift-off apparatus comprising: a laser source for irradiating a workpiece, in which a base plate is formed on a material layer, with laser light passing through the base plate; a conveyance mechanism in which the workpiece and the laser source are moved relatively with respect to each other, and a laser light formation unit, which divides laser light emitted from the laser source into two or more laser lights, so that two or more irradiation regions, which are separated from each other by the respective divided laser light, are formed on the workpiece, wherein the two or more irradiation regions formed by the laser light formation unit, the area of which is 0.25 mm 2 or less, are arranged so that end portions of adjoining irradiation regions which extend in a direction parallel to a moving direction of the workpiece, are overlapped each other in series and end portions of adjoining irradiation regions which extends in a direction perpendicular to the moving direction, are overlapped, as the workpiece is moved in a one direction relatively to the laser source and an entire face of the workpiece is irradiated with the laser light.