Patent ID: 9428413
Filing Date: 2016-08-30
CPC Classification: B23K,B28D,C03B,H01L,Y10T

Claim Text:
1. A manufacturing method of a laser working apparatus which includes a supporting base supporting a plate-shaped object to be processed, a laser light source emitting a laser,light, a reflection spatial light modulator modulating the laser light emitted from the laser light source, a converging optical system converging the laser light modulated by the reflection spatial light modulator, inside the object supported by the supporting base, and a controller controlling the reflection spatial light modulator, and that irradiates the object with the laser light while locating a converging point within the object, so as to form a modified region serving as a starting point for cutting along a line to cut the object, the manufacturing method of the laser working apparatus comprising the steps of: preparing a laser working apparatus and acquiring standard wavefront data by measuring a wavefront of first laser light emitted from a converging optical system of the laser working apparatus; acquiring wavefront data by measuring a wavefront of second laser light emitted from the converging optical system; and calculating a control signal for controlling the reflection spatial light modulator such that the wavefront of the second laser light becomes the wavefront of the first laser light on the basis of the standard wavefront data and the wavefront data acquired by measuring a wavefront of the laser light, to store the control signal in the controller.