| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser processing method that precisely cuts out an effective part having a chamfered corner part from a plate-like object with a reinforced glass plate.SOLUTION: The laser processing method comprises: a first step of forming a first modifying region, along a first predetermined cutting line 51 in a reinforced glass plate 10, for generating a first crack extending in a thickness direction of an object 1 by relatively moving a focus of a laser beam along the first predetermined cutting line 51 extending along a chamfered surface 18a at least of a corner part 18; and after the first step, a second step of forming a second modifying region, along a second predetermined cutting line 52 in the reinforced glass plate 10, for generating a second crack extending in a thickness direction of an object 1 by relatively moving the focus of the laser beam along the second predetermined cutting line 52 extending from the outside of an effective part 17 to the corner part 18. |
