The invention relates to a glass substrate for chemical strengthening where a surface is coated by magnetron sputtering with a temporary thin film that reduces the extent of ion exchange upon chemical strengthening and where the temporary thin film can be removed after the chemical strengthening by treatment with an etchant solution. Other embodiments relate to a method for making a chemically strengthened glass substrate with controlled curvature comprising: providing a substrate with opposed surfaces that are durable to a given etchant solution, forming a temporary thin film upon at least part of a surface of the glass substrate, chemically strengthening the glass substrate bearing the temporary thin film, and removing the temporary thin film after said chemical strengthening with said etchant solution. The thickness of the temporary thin film is chosen such that a controlled curvature is obtained upon chemical strengthening.

A method for winding up a glass ribbon is provided, in which, prior to winding up the glass ribbon, the two surfaces of the glass ribbon are each initially treated with a water-containing medium and subsequently dried so as to produce a defined content of water molecules on the two surfaces, by achieving a saturation of the surfaces of the glass ribbon with water, without bringing about an excess of water molecules. A glass roll is produced in which the electrostatic charge of the glass surface is reduced and, as a result, any undesired excess adherence of the glass surface to an interleaf material is prevented and, in this way, glass breakage, in particular during winding up and/or unwinding of the glass roll, can be markedly reduced.

A protected substrate includes a planar substrate having a surface and a burn-off temporary protective layer positioned over at least a portion of the surface. The burn-off temporary protective layer includes a wax, a polyolefin, a polyester, a polycarbonate, a polyether, or some combination thereof. The burn-off temporary protective layer is removable by a heat treatment process that does not substantially damage the surface. Various other protected substrates and methods for protecting a substrate are also disclosed.

This disclosure provides systems, methods, and apparatus for tempering or chemically strengthening glass substrates having electrochromic devices fabricated thereon. In one aspect, an electrochromic device is fabricated on a glass substrate. The glass substrate is then tempered or chemically strengthened. The disclosed methods may reduce or prevent potential issues that the electrochromic device may experience during the tempering or the chemical strengthening processes, including the loss of charge carrying ions from the device, redistribution of charge carrying ions in the device, modification of the morphology of materials included in the device, modification of the oxidation state of materials included in the device, and the formation of an interfacial region between the electrochromic layer and the counter electrode layer of the device that impacts the performance of the device.

A method of manufacture of an optical element for focusing electromagnetic radiation, comprising the steps of:•(a) providing a first light-transmissive glass substrate (20) having a front surface on which the electromagnetic radiation is incident in use and a back surface opposite to the front surface;•(b) applying a liquid silicone resin (30) to the back and/or the front surface of the glass substrate;•(c) contacting the liquid silicone resin with a mould such that the liquid silicone resin adopts the form of the mould and forms microstructures extending over the surface(s) of the glass substrate to which the liquid silicone resin has been applied;•(d) curing the liquid silicone resin to form a microstructured light-transmissive silicone coating wherein the glass surface has been

C roughened before application of the silicone.

Coated glass articles for a glass-ceramic ceramming process including a parting agent coated on a surface of the glass article. The parting agent coating can comprise an aqueous dispersion comprising amorphous silicon dioxide agglomerate particles and a dispersant. The parting agent coating can be dried to forming a parting layer for glass articles in a glass stack for a ceramming process that transforms the glass articles into glass-ceramic articles.

A method of making a device substrate article having a device modified substrate supported on a glass carrier substrate, including: treating at least a portion of the first surface of a device substrate, at least a portion of a first surface of a glass carrier, or a combination thereof, wherein the treating produces a surface having: silicon; oxygen; carbon; and fluorine amounts; and a metal to fluorine ratio as defined herein; contacting the treated surface with an untreated or like-treated counterpart device substrate or glass carrier substrate to form a laminate comprised of the device substrate bonded to the glass carrier substrate; modifying at least a portion of the non-bonded second surface of the device substrate of the laminate with at least one device surface modification treatment; and separating the device substrate having the device modified second surface from the glass carrier substrate.

Methods for coating a glass-based article, for example a cover glass, with a coating layer that is not deposited on the perimeter edge of the glass-based article. The methods may include direct patterning of a sacrificial material over a first region on a top surface the glass-based article but not a second region on the top surface of the glass-based article. The first region includes at least a portion of a perimeter edge of the glass-based article that is to be protected from deposition of the coating layer. After direct patterning of a sacrificial material and deposition of a coating layer, the sacrificial material may be removed such that the coating layer is disposed on the second region on the top surface of the glass-based article and not the first region. These methods may be used to make a glass-based article with non-edge-to-edge coating layers.

A protected substrate includes a planar substrate having a surface and a burn-off temporary protective layer positioned over at least a portion of the surface. The burn-off temporary protective layer includes a wax, a polyolefin, a polyester, a polycarbonate, a polyether, or some combination thereof. The burn-off temporary protective layer is removable by a heat treatment process that does not substantially damage the surface. Various other protected substrates and methods for protecting a substrate are also disclosed.

A process for protecting a glass substrate coated with an electrochromic stack, includes depositing a temporary protective layer on the electrochromic stack, the temporary protective layer including an organic polymeric matrix and having a thickness of between 1 μm and 30 μm, and the temporary protective layer being removable by heat treatment at a temperature of between 300° C. and 500° C., fora period of between 180 s and 240 s.