Structured plate-like glass element and process for the production thereof

US12297137B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Andreas Ortner · Gau-Algesheim, DE
• Andreas Roters · Mainz, DE
• Frank-Thomas Lentes · Bingen, DE
• Lutz Parthier · Kleinmachnow, DE
• Markus Heiss-Chouquet · Bischofsheim, DE
• Ulrich Peuchert · Bodenheim, DE
• Fabian Wagner · Heubach, DE
• Florian Resch · Mainz, DE
• Laura Brückbauer · Dorn-Dürkheim, DE
• Matthias Jotz · Mainz, DE
• Vanessa Gläßer · Mainz, DE

Key dates

• Filing date: Jul 14, 2021
• Grant date: May 13, 2025
• Expiry date: Nov 6, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B33/023
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method includes: providing a plate-like glass element having side faces and an ultrashort pulse laser having a laser beam; directing the laser beam onto one of the side faces; concentrating the laser beam by focusing optics to form an elongated focus in the glass element; producing a filament-shaped flaw in a volume of the glass element by a radiated-in energy of the laser beam, a longitudinal direction of which runs transverse to one of the side faces, and the ultrashort pulse laser radiates in a pulse or a pulse packet having at least two successive laser pulses to produce the filament-shaped flaw; widening the filament-shaped flaw to form a channel by exposing the glass element to an etching including an etching medium which removes glass at a rate of less than 8 μm per hour; and introducing rounded, hemispherical depressions in a wall of the channel by the etching.