Method of marking or inscribing a workpiece
AssigneeTesa SE
InventorsArne KOOPS, Sven REITER, Bernd Lühmann
Life of this patent
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Abstract
The present invention provides a method of and apparatus for marking or inscribing a workpiece (3) with high-energy radiation, more particularly with a laser beam (1), the workpiece (3) having a light-scattering surface (9) and the material of the workpiece (3) being transparent for the radiation wavelength, and a polymer matrix (7) being disposed on the workpiece (3) in such a way that the radiation passes through the workpiece (3) and its light-scattering surface (9) before impinging on the polymer matrix (7), characterized in that the light-scattering surface (9) of the workpiece (3) is wetted with a liquid or viscoelastic medium (11).
Claims12
A method of marking or inscribing a workpiece (3) comprising the steps of
- providing high-energy radiation (1),
- providing the workpiece (3) having a light-scattering surface (9) and made of a transparent material for the radiation wavelength, and having a polymer matrix (7) being disposing on the workpiece (3) in such a way that the radiation passes through the workpiece (3) and its light-scattering surface (9) before impinging on the polymer matrix (7),
- wherein the light-scattering surface (9) of the workpiece (3) is wetted with a liquid or viscoelastic medium (11).
The method according to any of the preceding claims, wherein the material of the workpiece (3) is a glass substrate which in the wavelength range of 600 nm to 1500 nm exhibits no absorption or has a degree of absorption of less than 10%, and using radiation in the wavelength range of 600 nm to 1500 nm.
The method according to any of the preceding claims, wherein the liquid or viscoelastic medium (11) is removed from the light-scattering surface (9) after the marking or inscribing.
An apparatus for marking or inscribing a workpiece (3) with a laser beam (1), comprising
- a laser beam source;
- a holder for the workpiece,
- the holder being designed to hold the workpiece (3), which has a light-scattering surface (9) whose material is transparent for the wavelength of the laser beam (1) and is in contact with a polymer matrix (7), in the path of the laser beam (1) in such a way that the radiation passes through the workpiece (3) and its light-scattering surface (9) before impinging on the polymer matrix (7),
- wherein the apparatus additionally has a dispenser unit (13) which is designed to wet the light-scattering surface (9) of the material with a liquid or viscoelastic medium (11).
Dependencies are inferred from the claim text.