Patent ID: 7649156

Claim:
A laser annealing apparatus to process a semiconductor in an inline manner, comprising: a laser beam emitting unit to emit a laser beam to a target region of a semiconductor; wherein the laser beam emitting unit comprises: a laser head to emit the laser beam, a plurality of reflectors to reflect a part of the laser beam emitted from the laser head and transmit another part of the laser beam, wherein the plurality of reflectors have predetermined sequential reflectances respectively so that laser beams having the same power can be applied to the target region of the semiconductor, and when the number of the plurality of reflectors is N, a reflectance of an n th reflector from the laser head is 1/((N−n)+1); a first nozzle and a second nozzle, through which gas used to control an atmosphere of the target region of the semiconductor is introduced or exhausted, the first nozzle and the second nozzle facing each other with the laser beam therebetween emitted from the laser beam emitting unit; a moving unit to horizontally move a plurality of the semiconductors at approximately the same transport speed, wherein the moving unit comprises a first transport speed adjusting photo-detector that is vertically spaced apart from a horizontal trajectory of the semiconductor to detect a first position of the semiconductor, and the moving unit comprises a second transport speed adjusting photo-detector that is vertically spaced apart from the horizontal trajectory of the semiconductor to detect a second position of the semiconductor, a movable stage to carry the semiconductor on the moving unit; and a driving unit to horizontally move the movable stage, wherein the driving unit is operable to move the movable stage faster when the laser beam is not emitted than when the laser beam is emitted to the semiconductor, the driving unit is operable to change a transport speed of the movable stage according to whether the first transport speed adjusting photo-detector detects light, the driving unit is operable to measure a time from when the first transport speed adjusting photo-detector detects the semiconductor to when the second transport speed adjusting photo-detector detects the semiconductor to calculate a current transport speed of the movable stage, and the driving unit is operable to adjust the transport speed of the movable stage according to the calculation result.