PCB (printed circuit boards)
CO2 lasers are commonly used for marking microglyph codes on printed circuit boards. Generally the boards are densely equiped with components, so the area for potential marking is rare. Microglyph codes have very little space requirements and due to their freeform capability the available area can be used most efficiently.
The high robustness of the microglyph codes enables a very broad process window. The marking process can cover a large variety of surfaces and coatings, as for example caused by changing thickness and varying type of solder coatings.