Patent ID: 8096147
Filing Date: 2012-01-17
Classification: B32B,C03C,Y10T

Abstract:
1. A method to fabricate a shaped glass structure, comprising: preparing a photosensitive glass substrate having a composition comprising: less than 76 weight % silica, at least 0.15 weight % Ag exposing at least one portion of the photosensitive glass substrate with an activating energy source, such as ultraviolet light (300 to 320 nm) or a directed source of protons using an activation exposure of 0.1-15 J/cm heating the glass substrate for at least ten minutes at a temperature that is in a temperature range of 420-520° C., heating the glass substrate for at least ten minutes at a temperature that is in a temperature range of 520-620° C., and cooling the glass substrate thereby transforming at least part of the exposed glass substrate to a crystalline material; and etching the glass substrate in an HF-containing etchant solution, wherein an etch ratio of exposed portion to said unexposed portion is at least 40:1, to provide a shaped glass structure.