Patent ID: 7649156
Filing Date: 2010-01-19
Classification: H01L

Abstract:
1. 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 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.