Patent ID: 9586857
Date: 2017-03-07
CPC Classifications: C03B,C03C,G03F

Claim:
1. A method of manufacturing a glass substrate to control fragmentation characteristics of the glass substrate, the method comprising: determining an etching pattern, the etching pattern being configured to control a fragmentation size of a glass substrate by modifying a stress field within the glass substrate to create an inhomogeneous stress field; masking a first surface of the glass substrate according to the etching pattern, the glass substrate being chemically strengthened glass, the glass substrate having an exterior region and an interior region, wherein the exterior region has residual compressive stresses and the interior region has residual tensile stresses; etching an unmasked portion of the first surface to produce a plurality of trenches in the first surface; and filling the plurality of trenches with a filler material to generate the inhomogeneous stress field in the glass substrate, wherein the filler material is a composition of a first material and a second material, the composition having a first volume, wherein the composition of the first material and the second material, when heated, experiences a chemical reaction to create one or more products, the one or more products combined having a second volume, and wherein the second volume is smaller than the first volume.