A method of manufacturing a glass sheet includes a start point forming step of forming a scribe line on a preset cutting portion of a glass sheet, a setting step of causing, through use of a support member having a groove-shaped recess, the support member to support the glass sheet having the scribe line formed thereon from one surface side so that the preset cutting portion is arranged on the recess, and a cutting step of generating a negative pressure in the recess to bend the preset cutting portion on the recess so that the one surface side protrudes, to thereby cut the glass sheet along the preset cutting portion with the scribe line as the start point. At the time of performing the cutting step, the entire recess is covered with a cover member from another surface side of the glass sheet through intermediation of the glass sheet.

A method of separating a transparent mother sheet includes contacting a first surface of the transparent mother sheet with an open ended pressure assembly including a pressure vessel shell, thereby forming a shell cavity defined by the first surface of the transparent mother sheet and the pressure vessel shell, where the transparent mother sheet comprises a damage path. The method also includes removing gas from the shell cavity through a fluid removal outlet extending through the pressure vessel shell to reduce a cavity pressure in the shell cavity, thereby applying stress to the damage path to separate a portion of the transparent mother sheet along the damage path.

A glass plate production method includes (1) preparing a glass material having a first main surface and a second main surface opposite to each other; (2) irradiating the first main surface of the glass material with a laser to form an in-plane void region having a plurality of voids arranged on the first main surface, and forming a plurality of internal void rows each having one void or two or more voids arranged from the in-plane void region toward the second main surface of the glass material; and (3) chemically strengthening the glass material having the internal void rows formed therein.

A glass plate production method includes (1) preparing a glass material having a first main surface and a second main surface opposite to each other; (2) irradiating the first main surface of the glass material with a laser to form an in-plane void region having a plurality of voids arranged on the first main surface, and forming a plurality of internal void rows each having one void or two or more voids arranged from the in-plane void region toward the second main surface of the glass material; and (3) chemically strengthening the glass material having the internal void rows formed therein.

Separation lines are formed in a glass plate having first and second main surfaces by irradiating with laser light. The separation lines are configured of a product line corresponding to an outline of a glass article to be separated from the glass plate; and a release line. The product line includes a first in-plane void array configured of in-plane voids arranged on the first main surface. A maximum distance between centers of the adjacent in-plane voids arranged on the first main surface falls within a range of 1 m to 10 m. The release line includes internal void arrays for release line, which are arranged along lines connecting the first and second main surfaces, respectively. A maximum distance between centers of the adjacent points, at which extension lines extended from the internal void arrays for release line cross the first main surface, is greater than 10 m.

Systems and methods are described for forming continuous laser filaments in transparent materials. A burst of ultrafast laser pulses is focused such that a beam waist is formed external to the material being processed without forming an external plasma channel, while a sufficient energy density is formed within an extended region within the material to support the formation of a continuous filament, without causing optical breakdown within the material. Filaments formed according to this method may exhibit lengths exceeding up to 10 mm. In some embodiments, an aberrated optical focusing element is employed to produce an external beam waist while producing distributed focusing of the incident beam within the material. Various systems are described that facilitate the formation of filament arrays within transparent substrates for cleaving/singulation and/or marking. Optical monitoring of the filaments may be employed to provide feedback to facilitate active control of the process.

The present disclosure relates to a method for manufacturing decorative panels made of flat glass for electronic household appliances, in particular household appliances that are fixed in position. The method comprises, in the specified order, at least the steps of providing a flat glass, producing a blank decorative panel by forming the provided flat glass with at least one of the steps of forming the outer contour of the decorative panel, edge treatment, or making at least one indentation on the operational front, the thermal tempering of the produced blank decorative panel, and applying at least one decorative print on the operational back of the thermally tempered blank decorative panel by means of a digital printing method.

A method for laser processing a laminate workpiece stack includes forming a contour line in a first transparent workpiece of the laminate workpiece stack having a resin layer disposed between the first transparent workpiece and a second transparent workpiece. Forming the contour line includes focusing a pulsed laser beam into a pulsed laser beam focal line directed into the first transparent workpiece to generate an induced absorption within the first transparent workpiece and translating the pulsed laser beam focal line along a first workpiece separation line, thereby laser forming the contour line having a plurality of defects. The method also includes separating the resin layer along a resin separation line by focusing the pulsed laser beam into the pulsed laser beam focal line directed into the resin layer and translating the pulsed laser beam focal line along the resin separation line, thereby laser ablating the resin layer.

A method for laser processing a laminate workpiece stack includes forming a contour line in a first transparent workpiece of the laminate workpiece stack having a resin layer disposed between the first transparent workpiece and a second transparent workpiece. Forming the contour line includes focusing a pulsed laser beam into a pulsed laser beam focal line directed into the first transparent workpiece to generate an induced absorption within the first transparent workpiece and translating the pulsed laser beam focal line along a first workpiece separation line, thereby laser forming the contour line having a plurality of defects. The method also includes separating the resin layer along a resin separation line by focusing the pulsed laser beam into the pulsed laser beam focal line directed into the resin layer and translating the pulsed laser beam focal line along the resin separation line, thereby laser ablating the resin layer.

A laser cutting apparatus and a laser cutting method are provided. A laser cutting method includes: preparing an object on a stage; cutting the object into a set shape by relatively moving and irradiating a laser beam along the set shape with respect to the object; and performing uniform heating compensation to reduce accumulation of thermal energy of the laser beam resulting from a change of speed at a shift point where a travelling direction of the laser beam with respect to the object changes.