Methods for laser cutting glass substrates

摘要

A method for cutting a glass article from a strengthened glass substrate having a surface compression layer and a tensile layer includes forming an edge defect in the surface compression layer on a first edge of the strengthened glass substrate. The method further includes propagating a through vent through the surface compression and tensile layers at the edge defect. The through vent precedes a region of separation along a cut line between the glass article and the strengthened glass substrate.

主权项

1. A method of cutting a glass article from a strengthened glass substrate comprising a surface compression layer and a tensile layer, the method comprising:
forming an edge defect in the surface compression layer on a first edge of the strengthened glass substrate; and propagating a through vent through the surface compression and tensile layers at the edge defect by creating a tensile stress field within the strengthened glass substrate that is present from the first edge to a second edge of the strengthened glass substrate along an entire length of a cut line, wherein the tensile stress field is formed by scanning a laser beam back and forth along the entire length of the cut line on the surface compression layer at a scanning speed equal to or greater than 0.5 m/s, the tensile stress field is perpendicular to the cut line, and the through vent precedes a region of separation along the cut line between the glass article and the strengthened glass substrate.