It's the method of laser-recording (etching) various kinds of information like data, name and sorts on the surface of wafer, inside of FPD and other various material using the principle of light being variously negative etched on the surface of material as the condition of it's wavelength and energy.
Application : IC, Wafer, LCD, ID card, Metal, Automotive, Mobile phone, Electronics, Label, PCB, Glass, Plastic, Ceramic, Battery, Rubber, Accessory,...