CO2 laser is a kind of gas laser, which can produce laser wavelengths of 9.3 μ m (mainly used for pet inkjet), 10.2 μ m (for coated carton processing) and 10.6 μ m (for non-metallic processing), belonging to the mid infrared band. It can carve non-metallic and some metal materials, and is widely used in food packaging, beverage packaging, pharmaceutical packaging, building ceramics, clothing accessories, tobacco, wine, leather, buttons, fabric cutting, craft gifts, rubber products, stone, electronic components, mobile phone shell, pen notebook and flat shell, wire stripping, film cutting, backlight plate marking, PCB barcode, shell nameplate, wood products, jade, agate and other coding and marking.