Abstract:
Strengthened glass articles having laser etched features, electronic devices, and methods of fabricating etched features in strengthened glass articles are disclosed. In one embodiment, a strengthened glass article includes a first strengthened surface layer and a second strengthened surface layer under a compressive stress and extending from a first surface and a second surface, respectively, of the strengthened glass article to a depth of layer, and a central region between the first strengthened surface layer and the second strengthened surface layer that is under tensile stress. The strengthened glass article further includes at least one etched feature formed by laser ablation within the first surface or the second surface having a depth that is less than the depth of layer and a surface roughness that is greater than a surface roughness of the first surface or second surface outside of the at least one etched feature.
Abstract:
Strengthened glass articles having laser etched features, electronic devices, and methods of fabricating etched features in strengthened glass articles are disclosed. In one embodiment, a strengthened glass article includes a first strengthened surface layer and a second strengthened surface layer under a compressive stress and extending from a first surface and a second surface, respectively, of the strengthened glass article to a depth of layer, and a central region between the first strengthened surface layer and the second strengthened surface layer that is under tensile stress. The strengthened glass article further includes at least one etched feature formed by laser ablation within the first surface or the second surface having a depth that is less than the depth of layer and a surface roughness that is greater than a surface roughness of the first surface or second surface outside of the at least one etched feature.
Abstract:
Glass interposer panels and methods for forming the same are described herein. The interposer panels include a glass substrate core formed from an ion-exchangeable glass. A first layer of compressive stress may extend from a first surface of the glass substrate into the thickness T of the glass substrate core to a first depth of layer D1. A second layer of compressive stress may be spaced apart from the first layer of compressive stress and extending from a second surface of the glass substrate core into the thickness T of the glass substrate core to a second depth of layer D2. A plurality of through-vias may extend through the thickness T of the glass substrate core. Each through-via is surrounded by an intermediate zone of compressive stress that extends from the first layer of compressive stress to the second layer of compressive stress adjacent to a sidewall of each through-via.
Abstract:
Glass interposer panels and methods for forming the same are described herein. The interposer panels include a glass substrate core formed from an ion-exchangeable glass. A first layer of compressive stress may extend from a first surface of the glass substrate into the thickness T of the glass substrate core to a first depth of layer D1. A second layer of compressive stress may be spaced apart from the first layer of compressive stress and extending from a second surface of the glass substrate core into the thickness T of the glass substrate core to a second depth of layer D2. A plurality of through-vias may extend through the thickness T of the glass substrate core. Each through-via is surrounded by an intermediate zone of compressive stress that extends from the first layer of compressive stress to the second layer of compressive stress adjacent to a sidewall of each through-via.
Abstract:
A method of cutting an article (172) from a chemically strengthened glass substrate (110) includes generating a pulsed laser beam (108) from a laser source (106). The pulsed laser beam (108) may have a pulse duration of less than about 1000 fs and an output wavelength such that the chemically strengthened glass substrate (110) is substantially transparent to the pulsed laser beam (108). The pulsed laser beam (108) may be focused to form a beam waist (109) that is positioned in the same horizontal plane as an inner tensile region (124) of the chemically strengthened glass substrate (110). The beam waist (109) may be translated in a first pass along a cut line (116), wherein the beam waist (109) traverses an edge (111) of the chemically strengthened glass substrate. The beam waist (113) may then be translated in a second pass along the cut line (116) such that a crack (119) propagates from the edge (113) along the cut line (116) ahead of the translated beam waist (109) during the second pass.
Abstract:
This disclosure describes a process for strengthening, by ion-exchange, the edges of an article separated from a large glass sheet after sheet has been ion exchanged to strengthen by exposing the one or a plurality of the edges of the separated article, only, to an ion exchange medium (for example without limitation, a salt, paste, frit, glass) while the glass surface is maintained at temperatures less than 200 °C.
Abstract:
Strengthened glass substrate sheets and methods of fabricating glass panels from glass substrate sheets are disclosed. In one embodiment, a method includes forming at least one series of holes through a thickness of the glass substrate sheet, wherein the at least one series of holes defines a perimeter of the glass panel to be separated from the glass substrate sheet. The method further includes strengthening the glass substrate sheet by a strengthening process, and separating the glass panel from the glass substrate sheet along the at least one series of holes. At least a portion of one or more edges of the glass panel has an associated edge compressive layer. In another embodiment, a strengthened glass substrate sheet includes at least one series of holes that defines a perimeter of one or more glass panels to be separated from the strengthened glass substrate sheet.
Abstract:
A glass sheet having enhanced edge strength. The glass sheet is down-drawn and has at least one laser-formed edge having a minimum edge strength of at least about 90 MPa. The laser-formed edge is substantially free of a chamfer or a bevel. The glass sheet can be strengthened after formation of the edge and is adaptable for use as a cover plate for display and touch screen applications, or as a display or touch screen for information-related terminal (IT) devices; as well as in other applications.
Abstract:
A method is provided for separating or dividing strengthened glass articles, particularly strengthened glass sheets, into at least two pieces, one of which has a predetermined shape and/or dimension. A flaw is initiated in the glass at a depth that is greater than the depth of the strengthened surface layer of the glass, and a vent extending from the flaw is created at a vent depth that is greater than the depth of and outside the strengthened surface layer to at least partially separate the glass. In one embodiment, the vent is generated by treating the glass with a laser to heat the glass to a temperature in a range from about 50°C below the strain point of the glass up to a temperature between the strain point and the anneal point of the glass. A glass article having at least one strengthened surface and at least one edge having an average edge strength of at least 200 MPa is also described.