PROCESSING METHOD OF GLASS SUBSTRATE

摘要

(Assignment) sampling and processing high strength glasses by preventing cracks from being spread to surround areas and suppressing degradation of strength. (Solution) The processing method is a method for sampling and processing the high strength glasses along a closed division expected line and comprises first and second reserve irradiation processes and a main irradiation process. The first reserve irradiation process focuses laser in a predetermined depth and irradiates laser along the division expected line and forms first process trace inside a substrate. The second reserve irradiation process focuses laser in a predetermined depth and irradiates laser in order to surround the division expected line on the outer circumference of the division expected line and forms second process trace on the outer circumference of the first process trace. The main irradiation process focuses laser in a predetermined depth after the second process and irradiates laser along the division expected line and proceeds cracks from the first processing trace towards the surface of the substrate or the opposite side.