Patent ID: 7615424

Claim:
A method for manufacturing a semiconductor device comprising: shaping a laser beam emitted from a laser oscillator into an elongate beam spot having a short side and a long side on a surface of an irradiation object provided over a scanning stage; and annealing the irradiation object by moving the scanning stage relative to the laser beam in the long-side direction and the short-side direction of the elongate beam spot while oscillating the laser beam; wherein the irradiation object is moved more slowly in the long-side direction of the elongate beam spot than in the short-side direction of the elongate beam spot, wherein an irradiation position of the laser beam in the irradiation object is controlled by detecting a marker formed over the irradiation object, and wherein the marker has a short side parallel to the long-side direction of the elongate beam spot, and a long side parallel to the short-side direction of the elongate beam spot.