Patent ID: 8844782
Filing Date: 2014-09-30
Classification: B26D,C03B,Y10T

Abstract:
1. A method of forming a scribe line in a chemically strengthened glass substrate, the method comprising: providing the chemically strengthened glass substrate, the chemically strengthened glass substrate comprising a first surface, a second surface, a first edge and a second edge, wherein each of the first surface and the second surface has a chemically strengthened surface layer under a compressive stress that is greater than 600 MPa at the first and second surfaces and extending from the surface to a depth of layer that is greater than 1/30th of a thickness of the chemically strengthened glass substrate, and a central region between the first surface and the second surface that is under tensile stress; applying a scoring blade to the first surface at an initiation location, wherein the initiation location is offset from the first edge by an initiation offset distance that is greater than a diameter of the scoring blade; translating the scoring blade or the chemically strengthened glass substrate such that the scoring blade scores a scribe line having a depth less than a total thickness of the chemically strengthened glass substrate into the first surface along a desired line of separation; and terminating the translation of the scoring blade or the chemically strengthened glass substrate such that the scoring blade stops at a termination location that is offset from the second edge of the chemically strengthened glass substrate by a termination offset distance that is greater than the diameter of the scoring blade to prevent full-body separation at the scribe line.