Transparent substrates with dielectric layer having a marking below the surface of the transparent substrate

A device comprising:

• a transparent substrate;
• a dielectric layer system that includes at least one dielectric layer defining a border area at a surface of the substrate;
• and
• a laser-induced marking below the surface of the substrate at the border area,
• wherein at least part of the laser-induced marking is within 500 μm of the surface and does not reach the border area, and
• wherein a material for the dielectric layer system has a higher destruction threshold compared to a material of the transparent substrate for at least one wavelength in the visible region, which has been used to mark the transparent substrate to form the laser induced marking.