A method for the production of glass or glass ceramic elements from flat glass or glass ceramic parts is provided where the edges of the glass or glass ceramic elements are treated by a combination of two processes. The flat glass or glass ceramic element with an edge surface connecting the two side surfaces is produced. The edge surface has at least one first elongated, strip-shaped edge region and at least one second elongated strip-shaped edge region, which are formed by a ground edge. The edge regions extend in the longitudinal direction along the edge surface and along the side surfaces. The first edge region has elongated parallel filamentary damages that are parallel and adjacent to one another and, in particular, spaced apart equidistantly, in the longitudinal direction thereof extending transversely to the side surfaces and along the surface of the first edge region.

A method for processing a transparent workpiece including directing a laser beam in a first orientation along a first beam pathway where a first portion of the laser beam includes a first laser beam focal line and generates an induced absorption to produce a first defect segment within the transparent workpiece. The method further includes adjusting the laser beam to a second orientation along a second beam pathway where a second portion of the laser beam includes a second laser beam focal line and generates the induced absorption to produce a second defect segment within the transparent workpiece. Each of the first and second laser beam focal lines include a circular angular spectrum within the transparent workpiece; and at least one of the laser beam focal lines include an internal focal line angle of greater than 10° relative to a plane orthogonal to the impingement surface at the impingement location.

A laser processing system for a glass workpiece comprises a frame with a first laser module thereon, a modifying device, and a blanking device. The blanking device comprises a second laser module, a hollow support element, a clamping module disposed on the frame, a heater disposed on the hollow support element, and a cooler connected to the clamping module. A method adapted to the system comprises a modifying process, a determining process, and a blanking process. In the modifying process, a first laser beam is irradiated to the glass workpiece along a processing contour line to intermittently modify the glass workpiece. According to the determining process, the blanking process is processed to have a crack being generated in a modified portion of the glass workpiece, wherein the crack divides the glass workpiece into an outer area and an inner area, and changes a temperature of the glass workpiece to have the glass workpiece being deformed, so that the outer area and the inner area are separated.

A filamentation process uses ultrafast laser pulses to form a line of filaments or perforations in a glass material in sheet form. The glass material is then cleaved using mechanical or thermal stress to form a glass substrate with a planar doughnut shape having an inner circular edge and an outer circular edge. The inner and outer edges may exhibit filamentary damage from the filamentation process, including microcracks and pillar shaped funnels along an entire length of the edge. The inner and/or outer edges may then be treated by polishing only, by etching only, or by etching and polishing to remove a portion of the filamentary damage to improve the strength of the edges. The resulting glass substrate may be used in a magnetic medium for a magnetic recording device, wherein it provides an edge strength sufficient to withstand high force shocks to the device.

A method of structuring a glass element having a first side face and a second side face is provided. The method includes the steps of: producing a filament-shaped flaw in the glass element with a pulsed laser beam along a focus line; etching to remove glass in the filament-shaped flaw to form a wall extending from the first side face towards the second side face, the wall having a boundary line that is tapered at a vertex between the wall and the first side face with a taper angle with respect to a perpendicular of the first side face; and adjusting the taper angle by controlling a feature of the focus line. The feature is selected from a group consisting of a position of the focus line, a length of the focus line, an intensity distribution of the focus line, and any combinations thereof.

A method for the laser-based machining of a sheet-like substrate, in order to separate the substrate into multiple portions, in which the laser beam of a laser for machining the substrate is directed onto the latter, is characterized in that, with an optical arrangement positioned in the path of rays of the laser, an extended laser beam focal line, seen along the direction of the beam, is formed on the beam output side of the optical arrangement from the laser beam directed onto the latter, the substrate being positioned in relation to the laser beam focal line such that an induced absorption is produced in the material of the substrate in the interior of the substrate along an extended portion, seen in the direction of the beam, of the laser beam focal line, such that a material modification takes place in the material of the substrate along this extended portion.

A method for separating an ultrathin glass using ultrashort laser pulses of an ultrashort pulse laser includes focusing the ultrashort laser pulses into the ultrathin glass such that a resulting focal zone is elongated in a beam direction and extends over an entire thickness of the ultrathin glass. The ultrashort laser pulses have a non-radially symmetric beam cross section perpendicular to a beam propagation direction. The method further includes introducing material modifications into the ultrathin glass along a separating line using the ultrashort laser pulses focused into the ultrathin glass, and separating the ultrathin glass along the separating line.

A manufacturing method of a glass article having an organic film includes irradiating a first main surface of a glass plate having the first main surface and a second main surface, opposite each other, with a laser light of a first laser, to form an in-plane void region, in which voids are arrayed, on the first main surface, and internal void arrays, including voids arrayed from the in-plane void region to the second main surface, in the glass plate; depositing the organic film on the first main surface or the second main surface of the glass plate; and irradiating and scanning the first main surface or the second main surface, on which the organic film was deposited, with a laser light of a second laser, along the in-plane void region, to separate the glass article from the glass plate along the in-plane void region.

Apparatus for manufacturing glass including a forming body configured to form a glass ribbon and a glass scoring apparatus positioned below the forming body. The glass scoring apparatus includes a frame, a cross-member assembly and a movable scoring unit coupled thereto. At least four drive assemblies are mounted on the frame, each drive assembly including a threaded shaft, a drive motor coupled to the threaded shaft and configured to rotate the threaded shaft, and a ball nut assembly engaged with threads of the threaded shaft and coupled to the cross-member assembly such that rotation of the threaded shafts by the drive motors causes the cross-member assembly to vertically rise or lower. Multiple scoring devices are provided to enable bidirectional scoring of the glass ribbon.

Methods and apparatus provide for: supporting a source glass sheet of 0.3 millimeters (mm) or less in thickness; scoring the glass sheet at an initiation line using a mechanical scoring device; applying a carbon monoxide (CO) laser beam to the glass sheet starting at the initiation line and continuously moving the laser beam relative to the glass sheet along a cutting line to elevate a temperature of the glass sheet to provide stress at the cutting line sufficient to cut the glass; and separating waste glass from the glass sheet to obtain a desired shape.