Schott Ag

Vanessa Gläßer

Frank-Thomas Lentes

Ulrich Peuchert

Andreas Ortner

Fabian Wagner

Andreas Roters

Lutz Parthier

Markus Heiss-Chouquet

Matthias Jotz

Florian Resch

Laura Brückbauer

Andreas Langsdorf

Markus Heiss

A toughenable glass article includes a glass and has a thickness of less than 100 μm and a cooling state which is such that, after chemical toughening to a depth of 30% of the thickness, the glass article has a relative thermal length change potential in a range from −1500 ppm to ≤0 ppm.

Toughenable glass article with negative relative thermal length change potential

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.

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

A plate-like glass element includes a pair of opposite side faces and an opening having a transverse dimension of at least 200 μm. The opening is delimited by an edge. The edge has a plurality of rounded, substantially hemispherical depressions that adjoin one another. The plurality of rounded, substantially hemispherical depressions having abutting concave roundings which form ridges.

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Mainz, Germany

Vanessa Gläßer