A method for manufacturing a glass substrate including an opening includes forming lines of inner and outer circumferential portions irradiated with a laser beam along substantially concentric circles in a surface of a glass blank, separating a portion on an inner side of the line of the outer circumferential portion of the glass blank and a portion on an outer side of the line of the outer circumferential portion from each other by heating the portion on the outer side of the line of the outer circumferential portion with radiant heat and separating a portion on an inner side of the line of the inner circumferential portion of the glass blank and a portion on an outer side of the line of the inner circumferential portion from each other by heating the portion on the outer side of the line of the inner circumferential portion with radiant heat.

A method for cutting, separating and removing interior contoured shapes in thin substrates, particularly glass substrates. The method involves the utilization of an ultra-short pulse laser to form defect lines in the substrate that may be followed by use of a second laser beam to promote isolation of the part defined by the interior contour.

A method for cutting, separating and removing interior contoured shapes in thin substrates, particularly glass substrates. The method involves the utilization of an ultra-short pulse laser to form defect lines in the substrate that may be followed by use of a second laser beam to promote isolation of the part defined by the interior contour.

An electrochromic structure can include a substrate and an electrochromic residue disposed on the substrate. The electrochromic structure can include an electrochromic stack on the substrate. A process can be used to separate the structure. The process can include forming a filament in the substrate and applying a thermal treatment to the substrate. Forming a filament can be performed by applying a pulse of laser energy to the substrate. In a particular embodiment, a filament pattern including a plurality of filaments can be formed in the substrate. The substrate can include mineral glass, sapphire, aluminum oxynitride, spinel, or a transparent polymer.

An electrochromic structure can include a substrate and an electrochromic residue disposed on the substrate. The electrochromic structure can include an electrochromic stack on the substrate. A process can be used to separate the structure. The process can include forming a filament in the substrate and applying a thermal treatment to the substrate. Forming a filament can be performed by applying a pulse of laser energy to the substrate. In a particular embodiment, a filament pattern including a plurality of filaments can be formed in the substrate. The substrate can include mineral glass, sapphire, aluminum oxynitride, spinel, or a transparent polymer.

A laser irradiation step in the present method includes irradiating a first surface (MG1) of a mother glass sheet (MG) with laser light (L) to heat a surface layer (SL) and an inner portion (IL) of the first surface (MG1), to thereby cause, through a thermal shock caused by the heating, a crack (CR) to propagate to a second surface (MG2) of the mother glass sheet (MG) along a thickness direction of the mother glass sheet (MG) while propagating along a preset cleaving line (CL).

A laser irradiation step in the present method includes irradiating a first surface (MG1) of a mother glass sheet (MG) with laser light (L) to heat a surface layer (SL) and an inner portion (IL) of the first surface (MG1), to thereby cause, through a thermal shock caused by the heating, a crack (CR) to propagate to a second surface (MG2) of the mother glass sheet (MG) along a thickness direction of the mother glass sheet (MG) while propagating along a preset cleaving line (CL).

A method for breaking out a sheet of glass includes tracing a score line on a first face of the sheet of glass, the score line delimiting an exterior part and an interior part of the sheet of glass, positioning a support facing the score line on the side of the sheet of glass opposite to the first face, and breaking out by simultaneous application of at least a first force on the exterior part of the sheet of glass and of at least a second force on the interior part of the sheet of glass.

A method for breaking out a sheet of glass includes tracing a score line on a first face of the sheet of glass, the score line delimiting an exterior part and an interior part of the sheet of glass, positioning a support facing the score line on the side of the sheet of glass opposite to the first face, and breaking out by simultaneous application of at least a first force on the exterior part of the sheet of glass and of at least a second force on the interior part of the sheet of glass.

Embodiments of the disclosure relate to a method of preparing a multi-piece laminated article. In the method a first glass ply and a second glass ply are co-sagged. The first glass ply is laser cut to form a first primary piece and a first secondary piece, and the second glass ply is laser cut to form a second primary piece and a second secondary piece. The first primary piece and the second primary piece each define a hole into which the first secondary piece and the second secondary piece, respectively, fit. The first primary piece and the second primary piece are laminated to each other to form a first laminated piece, and the first secondary piece and the second secondary piece are laminated to each other to form a second laminated piece. The method can be used to prepare, for example, automotive glazing.