Shiny marking of glass and sapphire without cracks and adjustable visibility

Technical glass products are made more resistant against scratches and damages with a high effort by chemical or thermal hardening to avoid failures and destruction of these expensive products.We are introducing a new type of a laser marking process which is crack free with adjustable visibility of the marking itself. Using this technology we demonstrated markings on different kind of glass and sapphire samples with attractive shiny effects. Basis for this marking process is a sub-ns Laser at 532 nm. The short pulse durations open a large process window for marking without any cracks on the sample surface. The high quality marking can be done with average fluencies of 30 to 50 J/cm² and pulse energies of 40 to 60 µJ at common beam diameters.The new marking is addressed to different markets like electronics, display, architecture, medical packaging, luxury goods, and bottles. Beside the adjustable visibility, the marking has some esthetic appeal and can be used to mark individual logos or names on a broad range of glass products. In the presentation we will show the achievable quality of the marking and demonstrate the adjustable visibility starting from nearly invisible to a maximum almost white level.Technical glass products are made more resistant against scratches and damages with a high effort by chemical or thermal hardening to avoid failures and destruction of these expensive products.We are introducing a new type of a laser marking process which is crack free with adjustable visibility of the marking itself. Using this technology we demonstrated markings on different kind of glass and sapphire samples with attractive shiny effects. Basis for this marking process is a sub-ns Laser at 532 nm. The short pulse durations open a large process window for marking without any cracks on the sample surface. The high quality marking can be done with average fluencies of 30 to 50 J/cm² and pulse energies of 40 to 60 µJ at common beam diameters.The new marking is addressed to different markets like electronics, display, architecture, medical packaging, luxury goods, and bottles. Beside the adjustable visibility, the marking has some esthetic appeal and can be used to mark individual logos or names on a broad ...