Patent ID: 9330919
Filing Date: 2016-05-03
CPC Classification: B23K,H01L

Claim Text:
1. A method for manufacturing a substrate, the method comprising: irradiating a single crystal substrate with a beam of laser or charged particles while moving an irradiation point of the beam with respect to the single crystal substrate so that a trajectory of the irradiation point on a surface of the single crystal substrate describes a striped pattern of straight lines, and non-crystalline regions being formed in the single crystal substrate along the trajectory, wherein the irradiation is repeated multiple times so that directions of the striped patterns are different from each other among the multiple times of irradiation, the repetition of the irradiation changes warpage of the single crystal substrate, and in the irradiation of multiple times, all of directions of the straight lines described in the multiple times of irradiation are not parallel to any of directions of crystal axes of the single crystal substrate in a plane parallel to the surface.