Patent · US Active

Method and device for separation of glass portions or glass ceramic portions

US11161766B2 · kind B2 · utility

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20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Andreas Ortner · Gau-Algesheim, DE
Albrecht Seidl · Niedernberg, DE
Frank-Thomas Lentes · Bingen, DE
Fabian Wagner · Heubach, DE

Key dates

Filing date	Jan 15, 2018
Grant date	Nov 2, 2021
Priority date	—
Expiry date	Jul 12, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24777
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method is provided that includes producing filamentary damages in a volume of a glass or glass ceramic element adjacently aligned along a separation line and extend obliquely relative to a surface of the glass or glass ceramic element; and separating a portion from the glass or glass ceramic element along the separation line. The step of producing the filamentary damages includes directing laser pulses of an ultrashort pulse laser obliquely on the surface so that the laser pulses have a light propagation direction that extends obliquely relative to the surface and so that the filamentary damages resulting from the laser pulses have the longitudinal extension that extends obliquely relative to the surface; generating a plasma within the volume with the laser pulses; and displacing the laser pulses at points of incidence over the surface along the separation line.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.