The purpose of the present invention is to provide a chemically strengthened glass in which reduction in glass surface strength is effectively suppressed even without performing a polishing treatment after a prolonged chemical strengthening treatment has been conducted at a high temperature. The present invention relates to a chemically strengthened glass having a specific glass composition, wherein: the surface roughness (Ra) is a specific value or greater; the compressive stress layer depth of a surface layer is a specific value or greater; by setting the hydrogen concentration in the glass surface layer to be within a specific range, the surface strength of the glass is dramatically improved even without performing an etching treatment using hydrofluoric acid or polishing the glass surface after a prolonged chemical strengthening treatment has been conducted at a high temperature.

A method for preparing an optically transparent, superomniphobic coating on a substrate, such as an optical substrate, is disclosed. The method includes providing a glass layer disposed on a substrate, the glass layer having a first side adjacent the substrate and an opposed second side, the glass layer comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, such that a glass layer has a composition in a spinodal decomposition region. The method further includes heating the second side of the glass layer to form a phase-separated portion of the layer, the phase-separated portion comprising an interpenetrating network of silicon oxide domains and boron oxide domains, and removing at least a portion of the boron oxide domains from the phase-separated portion to provide a graded layer disposed on the substrate. The graded layer has a first side disposed adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide and 10-40 wt. % boron oxide, and opposite the first side, a porous second side comprising at least 45 wt. % silicon oxide and no more than 5 wt. % boron oxide.

A method for preparing an optically transparent, superomniphobic coating on a substrate, such as an optical substrate, is disclosed. The method includes providing a glass layer disposed on a substrate, the glass layer having a first side adjacent the substrate and an opposed second side, the glass layer comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, such that a glass layer has a composition in a spinodal decomposition region. The method further includes heating the second side of the glass layer to form a phase-separated portion of the layer, the phase-separated portion comprising an interpenetrating network of silicon oxide domains and boron oxide domains, and removing at least a portion of the boron oxide domains from the phase-separated portion to provide a graded layer disposed on the substrate. The graded layer has a first side disposed adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide and 10-40 wt. % boron oxide, and opposite the first side, a porous second side comprising at least 45 wt. % silicon oxide and no more than 5 wt. % boron oxide.

Disclosed are a flexible cover window and a method of manufacturing the same. A glass-based flexible cover window includes planar portions formed so as to correspond to planar regions of a flexible display and a folding portion formed so as to be connected to the planar portions, the folding portion being formed so as to correspond to a folding region of the flexible display, the folding portion having a smaller thickness than each of the planar portions, wherein the flexible cover window includes a glass substrate and a shock compensation pattern unit formed on the glass substrate, the shock compensation pattern unit is formed at each of the planar portions and the folding portion, and the shock compensation pattern unit has cylindrical patterns.

Disclosed are a flexible cover window and a method of manufacturing the same. A glass-based flexible cover window includes planar portions formed so as to correspond to planar regions of a flexible display and a folding portion formed so as to be connected to the planar portions, the folding portion being formed so as to correspond to a folding region of the flexible display, the folding portion having a smaller thickness than each of the planar portions, wherein the flexible cover window includes a glass substrate and a shock compensation pattern unit formed on the glass substrate, the shock compensation pattern unit is formed at each of the planar portions and the folding portion, and the shock compensation pattern unit has cylindrical patterns.

In a method of fabricating a cover window, the method includes: forming, on a glass article having a flat upper surface, a mask layer including water glass and a recess portion having a partially recessed upper surface; and etching the mask layer and the glass article to form a cover window having a partially recessed upper surface.

A system and method of production of matt effect or matt glass that eliminates the double-sided printing process in the production process of glasses used in products such as ovens, refrigerators, bottle cabinets, combi boilers, built-in appliances, fume hoods, stove glass, etc., prevents fingerprints on glass and increases the scratch resistance.

A system and method of production of matt effect or matt glass that eliminates the double-sided printing process in the production process of glasses used in products such as ovens, refrigerators, bottle cabinets, combi boilers, built-in appliances, fume hoods, stove glass, etc., prevents fingerprints on glass and increases the scratch resistance.

A method of manufacturing a cell unit substrate, includes: a modified zone-formation step in which modified zones are formed along a predetermined cutting line on the mother substrate to be spaced apart from each other by a first distance by irradiating the mother substrate with laser beams having an energy intensity within an ablation threshold of the mother substrate along the cutting line, a modified zone-etching step in which through-holes are formed along the cutting line on the mother substrate to be spaced apart from each other by the first distance by etching the modified zones, a surface strengthening step in which the mother substrate having the through-holes therein is subjected to surface strengthening, with the mother substrate dipped in a strengthening solution, and a substrate separation step in which the cell unit substrates are separated from the surface-strengthened mother substrate.

A method of manufacturing a cell unit substrate, includes: a modified zone-formation step in which modified zones are formed along a predetermined cutting line on the mother substrate to be spaced apart from each other by a first distance by irradiating the mother substrate with laser beams having an energy intensity within an ablation threshold of the mother substrate along the cutting line, a modified zone-etching step in which through-holes are formed along the cutting line on the mother substrate to be spaced apart from each other by the first distance by etching the modified zones, a surface strengthening step in which the mother substrate having the through-holes therein is subjected to surface strengthening, with the mother substrate dipped in a strengthening solution, and a substrate separation step in which the cell unit substrates are separated from the surface-strengthened mother substrate.