Patent ID: 8937264
Filing Date: 2015-01-20
Classification: B23K,B28D,B65G,C03B,C03C,G02F,H01L,Y02P,Y10T

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: irradiating a substrate with laser light comprising a pulsed laser light at a converging point within the substrate, so that the converging point of the pulsed laser light is positioned within the substrate, in order to form a molten processed spot within the substrate at the converging point; performing the irradiating step at multiple locations along each of a plurality of intersecting cutting lines along which the substrate is to be cut in order to form a plurality of modified spots within the substrate at converging points of the pulsed laser light respectively, without melting a pulsed laser light incident surface of the substrate, the modified spots being continuously formed and make up a modified region formed only within the substrate and being formed in the substrate only by the laser irradiation; and cutting the substrate into parts along the plurality of intersecting cutting lines by growing cracks from the modified spots towards a front and back surface of the substrate, wherein the step of cutting the substrate into the parts includes deforming a sheet supporting the substrate and applying stress to the substrate to cut and separate the substrate on the sheet into the parts, and the substrate is thereby cut in order to provide at least one manufactured semiconductor device.