Laser cutting machine is an important tool in the cutting field, known as the fast "knife". The principle is to irradiate the material surface with high-density and high-energy laser beam, vaporize and remove some materials to form cutting. At present, there are many kinds of lasers in the market, including many kinds of light sources. Each light source has different advantages and is applied to various materials; Several light sources commonly used in laser cutting in the circuit board industry are optical fiber (red light), purple light (UV) and green light. Different light sources are applied to different materials. The higher the requirements for the characteristics of materials to be processed, the thickness of materials, the processing quality, and the quality and thermal impact of laser beams, the different the absorption of laser bands, The laser cutting machine selected will also be different; Optical fiber (red light): The wavelength of optical fiber is 1064nm, which has high stability, high precision, fast running speed, low processing cost, high laser power and many kinds of cutting materials, which is suitable for the processing of large products; Applicable materials for optical fiber: stainless steel plate, aluminum substrate, ceramic substrate, copper substrate, PCB, ceramic sheet, carbon steel, aluminum alloy, brass, red copper, pickling plate, galvanized plate, silicon steel plate, electrolytic plate, titanium alloy, manganese alloy, etc., which are suitable for cutting all kinds of metal materials; Green light: The wavelength of green light is 532nm. Its spot is very small and its focal length is shorter. It belongs to the cold processing mode and plays an irreplaceable role in precision cutting processing, especially in circuit board, glass, ceramics, jewelry, glasses and other industries. Green light applicable materials: precision cutting of covering film, FPC soft board, PCB soft and hard board, PET / pi / PP flexible film, ultra-thin glass, ceramic substrate and other materials; Ultraviolet (UV): UV laser has a wavelength of 355nm. The product of this wavelength belongs to the omnipotent type, and its spot is also very small. Due to the special um wavelength, it has the title of omnipotent in the traditional processing field. Its figure can be seen in laser marking, laser cutting and laser welding. If the fiber laser can't sit, it can do it, and if C02 can't be processed, it can also do it, In ultra-thin cutting of metal products, it has the advantages of no burr, neat and smooth, fast speed and low energy consumption. Purple light applicable materials: covering film, FPC soft board, PCB soft and hard board, FPC auxiliary materials, ultra-thin metal, ceramics, polymer materials, resin, silicon wafer, PET / pi / PP film, adhesive film, copper foil, explosion-proof film, electromagnetic film, Sony glue and other flexible films;