Device for and method of edge stripping and grooving coated substrates using two laser sources acting on the same side of the coated transparent substrate

摘要

The device comprises a first laser source that emits a first laser beam (22) at a first laser discharge point (34) for edge deletion of a coated transparent substrate (17), a second laser source that emits a second laser beam at a second laser discharge point (35) for introducing a notch in the delaminated edge strip of the substrate, and a transportation system (11) for supporting the substrate. The first laser discharge point and the second laser discharge point are arranged with respect to the same side of a surface of the substrate. The device comprises a first laser source that emits a first laser beam (22) at a first laser discharge point (34) for edge deletion of a coated transparent substrate (17), a second laser source that emits a second laser beam at a second laser discharge point (35) for introducing a notch in the delaminated edge strip of the substrate, and a transportation system (11) for supporting the substrate. The first laser discharge point and the second laser discharge point are arranged with respect to the same side of a surface of the substrate so that the first laser beam and the second laser beam act on the same side on the substrate. The first and second laser beams are focused: on the surface of the substrate facing the first laser discharge point and the second laser discharge point; on the surface of the substrate facing away the two laser discharge points; on the surface of the substrate facing the two laser discharge points; or on opposing surfaces of the substrate. The first laser beam has a constant energy density distribution such as a top-hat profile over the beam cross-section. The beam cross-sections of two successive following first laser beams partially overlap. The first laser source: emits a laser light with a wavelength of 1020-1070 nm; has a pulse duration of 25-35 ns in pulsed mode; and/or has a pulse energy density of 0.1-1 J/cm 2. The first laser discharge point is held in a two-dimensional adjustment unit and guided on the substrate to be stripped. The second laser source: is directly focused onto the surface of the substrate; emits a laser light with the wavelength of 500-550 nm; has a pulse duration of 25-35 ns in the pulsed mode; and/or has a pulse energy density of 0.5-1.5 kJ/cm 2. The second laser beam has a Gaussian power density distribution over the beam cross section in the radial direction. A laser having a first beam shaping unit forms the first laser source, and a laser with a frequency doubling unit and a second beam shaping unit forms the second laser source. The transportation system comprises a bridge arranged perpendicular to the transport system, where the bridge is movably mounted at the first and second discharge points. The first laser discharge point and/or the second laser discharge point are held at a controllable, movable device arm. The device is arranged at a coating plant, at a cutting table with a breaking device or on an insulated-production unit. An independent claim is included for a method for edge stripping and grooving coated substrates.