Patent ID: 8045184

Claim:
An evaluation method for a sample for evaluation of laser irradiation position, comprising the steps of: moving a semiconductor substrate in a predetermined direction at an evaluation speed while the semiconductor substrate is irradiated with a plurality of pulse laser beams, thereby forming a sample for evaluation, wherein the sample contains pulse-irradiated regions, and wherein each of the pulse-irradiated regions is formed by a single pulse laser beam that corresponds to one of the plurality of the pulse laser beams; taking image data of the sample extracting each relative positional information between the pulse-irradiated regions in the sample from the image data; and evaluating stability of the each relative positional information between the pulse-irradiated regions in the sample, wherein the each relative positional information contains a distance between adjacent pulse-irradiated regions, and wherein the evaluation speed is such a speed that separates the pulse-irradiated regions in the sample from each other in the predetermined direction.