Patent ID: 7513949

Claim:
An apparatus of manufacturing a semiconductor device comprising: an oscillator configured to emit a laser beam; an optical system comprising a cylindrical lens which processes the laser beam into a linear laser beam having a trapezoidal energy distribution in a width direction, the trapezoidal energy distribution satisfying inequalities 0.5L 1 ≦L 2 ≦L 1 and 0.5L 1 ≦L 3 ≦L 1 on a surface to be irradiated where, assuming that a maximum energy is 1, L 1 is a first beam width of two points having an energy of 0.95 and L 1 +L 2 +L 3 is a second beam width of two points having an energy of 0.70, with L 2 and L 3 occupying two peripheral portions of the first beam width; and a stage for flattening and mounting a substrate on which the surface to be irradiated is provided, the stage comprising a plurality of suction inlets, wherein the stage is configured to move in the width direction of the linear laser beam during irradiation of the linear laser beam.