A method for laser-based machining of a flat substrate, to separate the substrate into a plurality of sections, in which the laser beam of a laser is directed at the substrate using an optical arrangement, which is positioned in the beam path of the laser. The optical arrangement forms a laser beam focal line that is extended as viewed along the beam direction and the substrate is positioned relative to the laser beam focal line such that an induced absorption is produced in the material of the substrate along a section of the laser beam focal line that is extended as viewed in the beam direction.

The invention relates to a method for separating solid-body slices (1) from a donor substrate (2). The method comprises the following steps: providing a donor substrate (2), producing at least one modification (10) within the donor substrate (2) by means of at least one LASER beam (12), wherein the LASER beam (12) penetrates the donor substrate (2) via a planar surface (16) of the donor substrate (2), wherein the LASER beam (12) is inclined with respect to the planar surface (16) of the donor substrate (2) such that it penetrates the donor substrate at an angle of not equal to 0° or 180° relative to the longitudinal axis of the donor substrate, wherein the LASER beam (12) is focused in order to produce the modification (10) in the donor substrate (2) and the solid-body slice (1) detaches from the donor substrate (2) as a result of the modifications (10) produced or a stress-inducing layer (14) is produced or arranged on the planar surface (16) of the donor substrate (2) and mechanical stresses are produced in the donor substrate (2) by a thermal treatment of the stress-inducing layer (14), wherein the mechanical stresses produce a crack (20) for separating a solid-body layer (1), which crack propagates along the modifications (10).

A method for laser processing a transparent workpiece includes focusing a pulsed laser beam output by a pulsed laser beam source into a pulsed laser beam focal line directed into the transparent workpiece, thereby forming a pulsed laser beam spot on the transparent workpiece and producing a defect within the transparent workpiece, directing an infrared laser beam output onto the transparent workpiece to form an annular infrared beam spot that circumscribes the pulsed laser beam spot at the imaging surface and heats the transparent workpiece. Further, the method includes translating the transparent workpiece and the pulsed laser beam focal line relative to each other along a separation path and translating the transparent workpiece and the annular infrared beam spot relative to each other along the separation path synchronous with the translation of the transparent workpiece and the pulsed laser beam focal line relative to each other.

Methods of separating a glass web that is moving at a glass web velocity. The method includes exposing a separation path on the glass web to at least one laser beam spot that moves with a laser beam spot velocity vector that is equal to a glass web velocity vector in a conveyance direction. The method also includes creating a defect on the separation path while the separation path is under thermal stress from the laser beam spot, whereupon the glass web spontaneously separates along the separation path in response to the defect. In further examples, a glass web separation apparatus includes a first reflector that rotates such that a laser beam spot repeatedly passes along a separation path and a second reflector that rotates such that the laser beam spot moves in a conveyance direction of the glass web.

Methods and apparatus provide for: cutting a thin glass sheet along a curved cutting line, where the curve is divided into a plurality of line segments; applying a laser beam and continuously moving the laser beam along the cutting line; applying a cooling fluid simultaneously with the application of the laser beam in order to propagate a fracture in the glass sheet along the cutting line; and varying one or more cutting parameters as the laser beam moves from one of the plurality of line segments to a next one of the plurality of line segments, wherein the one or more cutting parameters include at least one of: (i) a power of the laser beam, (ii) a speed of the movement, (iii) a pressure of the cooling fluid, and (iv) a flow rate of the cooling fluid.

A glass plate, containing: a first main surface and a second main surface opposite to each other, wherein an in-plane void region having a plurality of voids is arranged on the first main surface, a plurality of internal void rows each having one void or two or more voids are arranged from the in-plane void region toward the second main surface, and a cut surface obtained by cutting the glass plate to pass through the in-plane void region and the plurality of internal void rows has a compressive stress layer formed by applying a chemical strengthening treatment in the center of the cut surface.

Apparatus and methods for processing a glass sheet can include a coating chamber including a dispensing port to dispense a coating on a major surface of the glass sheet. In some embodiments, an apparatus can include a fog chamber including an enclosure, a fog generator to provide fog to the enclosure, and a passage in the enclosure from which fog can exit the enclosure to contact a major surface of the glass sheet. In some embodiments a method can include providing a glass sheet to a coating chamber, and dispensing a coating on a major surface of the glass sheet. In some embodiments, a method can include providing a glass sheet to a fog chamber, providing fog to an enclosure of the fog chamber, and contacting a major surface of the glass sheet with the fog by passing the fog from the enclosure through a passage in the enclosure.

A glass blank is cut out from a glass plate by forming a crack starting portion inside the glass plate by moving a first laser beam relative to the glass plate such that a focal position of the laser beam is located in an inner portion of the glass plate in its thickness direction and the focal position forms a circle when viewed from a surface of the glass plate, then causing cracks to develop from the crack starting portion toward main surfaces of the glass plate, and splitting the glass plate to separate, from the glass plate, a glass blank that includes a separation surface having an arithmetic average surface roughness Ra smaller than 0.01 m and a roundness not larger than 15 m. Thereafter, main surfaces of the glass blank are ground or polished.

The present application belongs to the technical field of manufacture for protection film for a terminal curved surface, and relates to a protection film for a terminal curved surface and manufacture method thereof, the hardened layers is provided on both sides of the substrate layer, and the substrate layer and the two hardened layers form the original sheet. The original sheet is hot-pressed by a hot pressing device, and the upper mold and the lower mold clamping the original sheet are heated, pressurized and cooled in order to obtain a protection film for a terminal curved surface, and the mold core outer rounded corner combining with the mold cavity inner rounded corner are pressurized to form a curved surface portion. The hardened layers is disposed on both sides of the substrate layer, so that the stress on both sides of the substrate layer are cancel each other after the substrate layer is heated, and the terminal surface protective film is more flat. The protection film for a terminal curved surface is easy to be molded, sensitive to be touched, high in hardness, and the outer side hardness can reach 9H, which is not easy to produce scratches, anti-fingerprint, anti-fragmentation edge, explosion-proof, and the protection film for a terminal curved surface has a curved surface portion suitable for protecting the terminal curved screen.

A method for laser processing a transparent workpiece includes focusing a pulsed laser beam output by a pulsed laser beam source into a pulsed laser beam focal line directed into the transparent workpiece, thereby forming a pulsed laser beam spot on the transparent workpiece and producing a defect within the transparent workpiece, directing an infrared laser beam output onto the transparent workpiece to form an annular infrared beam spot that circumscribes the pulsed laser beam spot at the imaging surface and heats the transparent workpiece. Further, the method includes translating the transparent workpiece and the pulsed laser beam focal line relative to each other along a separation path and translating the transparent workpiece and the annular infrared beam spot relative to each other along the separation path synchronous with the translation of the transparent workpiece and the pulsed laser beam focal line relative to each other.