Patent ID: 7929154
Filing Date: 2011-04-19
Classification: B23K,G03F,H01L

Abstract:
1. A laser irradiation apparatus comprising: a laser oscillator emitting a laser beam; an optical system which shapes the laser beam into a linear beam on a surface of an irradiation object to irradiate the surface of the irradiation object with the linear beam; an X-Y stage disposed to provide the irradiation object over the X-Y stage to anneal a region of the irradiation object by the irradiation with the linear beam; an illumination device which obliquely emits light to the surface of the irradiation object irradiated with the linear beam; and a camera for detecting the annealed region of the irradiation object, wherein the XY stage is equipped to move the irradiation object based on misalignment between a predetermined irradiation position and the annealed region of the irradiation object to irradiate the irradiation object with the linear beam at the predetermined irradiation position.