Patent EP-2336823-A1 (EP)
Inventor: BOEGLI CHARLES
IPC: C03C23/00
Filed: 2009-12-18
Abstract: The method for producing masks and/or panels for a laser system for generating microstructures on a solid-state surface, comprises scattering the opaque area laser radiations for the laser radiation of the masks and/or panels of the striking laser radiation. The areas scattering the laser radiation are modified and roughened by irradiation through femtoseconds-, picoseconds- or fluoride laser beam. The substrate is quartz glass, sapphire, calcium fluoride and magnesium fluoride. The femtosecond laser has an average wavelength of 775 nm or frequency-doubled or -tripled wavelength. The method for producing masks and/or panels for a laser system for generating microstructures on a solid-state surface, comprises scattering the opaque area laser radiations for the laser radiation of the masks and/or panels of the striking laser radiation. The areas scattering the laser radiation are modified and roughened by irradiation through femtoseconds-, picoseconds- or fluoride laser beam. The substrate is quartz glass, sapphire, calcium fluoride and magnesium fluoride. The femtosecond laser has an average wavelength of 775 nm or frequency-doubled or -tripled wavelength and the fluorine laser has a wavelength of 157 nm. The mask is produced with a number of transparent triangles or a mask with a number of stripes with gradually transparency. The mask and panels for producing microstructures on a solid-state surface, where the mask is arranged with the panels in a replacing device and exists itself the mask in a homogeneous spot of a mask projection-unit of an excimer laser system and serves the production of blaze lattice (77). The blaze lattice is arranged in optical lattice-arrays, where the lattice period of the blaze lattice is 0.5-5 mu m and the blaze lattice is linearly or circularly shaped. Each diffraction gratings-array consists of sub areas whose linear expansion has a value below the resolving power of the human eye, which contains a pixel, which is limited of a diffraction grating structure for producing single spectral color. Each sub area contains two pixels with each of a lattice constant different from one another for producing two different spectral color. The pixel area and/or the number of pixel is selected in such a way that the different spectral colors in a given view direction are superimposed to a mixed color. The wavelengths are selected for the basic spectral colors such as red, green and blue on the application and that for viewing the mixed color with the human eye. The three colors are red, green and blue with a wavelength lambda red of 630 nm, lambda green of 530 nm and lambda blue of 430 nm. The sub faces have a maximum linear expansion of 200 mu m and the associated pixel areas have a maximum linear expansion of 66.67 mu m, and are selected to character, images, logos, or additional authentication string together on a solid-body surfaces, which is a hard-coated surface of an embossing roller or an embossing stamp for embossing of packing film, where the hard material coating consists of tungsten carbide, boron carbide, silicon carbide (SiC) or similar hard materials. Independent claims are included for (1) a device for producing masks and/or panels for a laser system; and (2) a packaging film.