Glass sheet cutting method

Abstract

A glass sheet cutting device (1) fuses and divides a glass substrate (G) using a preset cutting line (CL) as a boundary while supplying an assist gas (AG) and a laser beam from above the glass substrate (G) along the preset cutting line (CL) of the glass substrate (G). The glass sheet cutting device (1) includes a first laser irradiator (2) for radiating a fusing laser beam (LB1) and a second laser irradiator (3) for radiating an annealing laser beam (LB2). Through a fusing gap (S) formed between fused end surfaces (Ga1, Gb1) by fusing, the second laser irradiator (3) radiates the annealing laser beam (LB2) obliquely from above onto the fused end surface (Ga1) to be annealed.

Dependencies are inferred from the claim text.