Transparent glass substrate and process for manufacturing such a substrate

摘要

This transparent glass substrate has at least one face which is provided with a texturing formed by a plurality of geometric features in relief relative to a general plane of the face, this texturing being adapted in order to ensure a transmission of radiation through the substrate greater than the transmission of radiation through a substrate that is identical but lacks texturing. The face of the substrate is also provided with an antireflection layer having a refractive index between the refractive index of air and the refractive index of the glass. The antireflection layer is an etched out superficial portion of the glass substrate on the side of the face, which comprises a structure based on silica and voids having a characteristic dimension between 0.5 nanometers and 50 nanometers.

主权项

1. A transparent glass substrate, comprising at least one face which comprises a texturing formed by a plurality of geometric features in relief relative to a general plane (π) of said face,
wherein the texturing is adapted in order to ensure a transmission of radiation through the substrate greater than the transmission of radiation through a substrate that is identical but lacks the texturing, wherein the features in relief are pyramids or cones having non-zero apex half-angles, wherein any apex half-angle of the features in relief is less than 70°, wherein, for each feature in relief, a ratio of a thickness to a width of the feature is greater than or equal to 0.1, wherein the face also comprises an antireflection layer having a refractive index between the refractive index of air and a refractive index of a glass of the substrate, and wherein the antireflection layer is an etched out superficial portion of the glass substrate on a side of the face, which comprises a structure comprising silica and voids, created by a treatment of said face in an acid solution that is supersaturated with silica.