Corning Incorporated
GLASS SUBSTRATE WITH A TEXTURED SURFACE WITH SURFACE FEATURES HAVING A CERTAIN RATIO OF HEIGHT-TO-WIDTH TO PROVIDE ANTI-GLARE PROPERTIES AND INCREASED RESISTANCE TO SCRATCHES

Abstract:

A glass substrate comprises: a first surface with surface features having an average width, an average height, a ratio of the average width to the average height of from about 0.04 to about 0.24, and the first surface has a haze value of 3% to 40%. The glass substrate can be transparent to electromagnetic radiation in the visible spectrum. The glass substrate can have a composition of: 61-75 mol. % SiO.sub.2; 7-15 mol. % Al.sub.2O.sub.3; 0-12 mol. % B.sub.2O.sub.3; 9-21 mol. % Na.sub.2O; 0-4 mol. % K.sub.2O; 0-7 mol. % MgO; and 0-3 mol. % CaO. The first surface can have an average surface roughness Ra of from 10 nm to 1,000 nm. The first surface can have an average characteristic largest feature size of from 200 nm to 50 .mu.m. The ratio of the average width to the average height can be from 0.06 to about 0.08.