Schott Ag

Clemens Kunisch

Frank-Thomas Lentes

Andreas Ortner

Kurt Nattermann

Michael Kluge

Jens Ulrich Thomas

Ralf Jedamzik

Thoralf Johansson

A method for preparing a workpiece for separation is provided that includes providing a workpiece that is transparent for light of a pulsed laser beam, splitting the laser beam into two partial beams using an optical system, directing both partial beams onto the workpiece, and moving the workpiece and the partial beams relative to one another. The partial beams are directed onto the workpiece incident at different angles to the normal of the irradiated surface and superimposed inside the workpiece such that the partial beams interfere with one another to form a sequence of intensity maxima inside the workpiece. The intensity at the intensity maxima is sufficiently high to modify the material of the workpiece so that a chain-like periodic pattern of material modifications is formed along a path defining a separation line.

Methods and devices for introducing separation lines into transparent brittle fracturing materials

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Munich, Georgia

Clemens Kunisch