Ultraviolet (UV) laser is able to provide high energydensity withradiation wavelengths below0 .4μmevenifthe energy is low. Differing from infrared treatingprocess ,UVtreating process is not a "heat" process innature.A mass of polymer and metal is easy to absorbUV laser compared with infrared laser .UV photonswith high energy can destroythe molecular bondsinthematerial surface directly.Laser diode (LD) pumped sol-id-state UVlaser has high efficiency,compact structure,longlifeti me,low mai…