Patent ID: 11897056
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H  G | IPC B  G  H

Claim 7:
8. A laser processing method that emits a laser light with at least a part of a focusing region being on a target to form a modified region in the target, the laser processing method comprising:
a determination step of determining, based on target information on the target and line information on a line extending annularly on an inner side of an outer edge of the target for relatively moving the part of the focusing region along the line, a first orientation that is an orientation of a longitudinal direction that a shape of a part of the focusing region within a plane orthogonal to an optical axis of the laser light has, for relatively moving the part of the focusing region along a first region of the line, and a second orientation that is an orientation of the longitudinal direction for relatively moving the part of the focusing region along a second region of the line, to make the longitudinal direction intersect with a movement direction of the part of the focusing region;
a first processing step of forming the modified region of relatively moving the part of the focusing region along the first region and stopping formation of the modified region in a region of the line other than the first region;
a second processing step of forming the modified region of relatively moving the part of the focusing region along the second region and stopping formation of the modified region in a region of the line other than the second region;
a first adjustment step of adjusting the orientation of the longitudinal direction to be the first orientation when the first processing step is performed, and
a second adjustment step of adjusting the orientation of the longitudinal direction to be the second orientation when the second processing step is performed.