Patent ID: 7679800
Filing Date: 2010-03-16
Classification: B23K,C30B,G02B,H01L,H01S

Abstract:
1. A laser irradiation apparatus comprising: a half mirror for dividing a laser beam into a first laser beam and a second laser beam; a first movable mirror for deflecting the first laser beam in a main scanning direction; and an elongated second movable mirror for receiving the first laser beam deflected in the main scanning direction and scanning the first laser beam in a sub scanning direction, a third movable mirror for deflecting the second laser beam in a second main scanning direction, and an elongated fourth movable mirror for receiving the second laser beam deflected in the second main scanning direction and scanning the second laser beam in a second sub scanning direction, wherein the second movable mirror includes means for scanning the first laser beam in the sub scanning direction at a rotation angle around an axis in a longitudinal direction of the second movable mirror and irradiating an object to be treated placed over a stage with the laser beam, wherein the elongated second movable mirror has such an area that allows a reception of a plurality of first laser beams, wherein the fourth movable mirror includes means for scanning the second laser beam in the second sub scanning direction at a rotation angle around an axis in a longitudinal direction of the fourth movable mirror and irradiating the object to be treated which is placed on the stage with the second laser beam, and wherein the fourth movable mirror has such an area that allows a reception of a plurality of second laser beams.