Patent ID: 8327666
Filing Date: 2012-12-11
Classification: C03B,C03C,Y10T

Abstract:
1. A method of separating a strengthened glass sheet, the method comprising: a. providing the strengthened glass sheet, the strengthened glass sheet having a first surface and a second surface, wherein each of the first surface and the second surface has a strengthened surface layer under a compressive stress and extending from the surface to a depth of layer, and a central region under a tensile stress; b. forming at least one laser induced damage line in the central region at a predetermined depth below the first surface by irradiating the glass sheet with a nanosecond pulsed laser, the nanosecond pulsed laser having a power in a range from about 1 W to 3 W; and c. initiating and propagating a crack to separate the glass sheet along the at least one damage line into at least two pieces, wherein at least one of the pieces has at least one of a predetermined shape and a predetermined dimension.