Along with the continuous development of technology, the 3C industry has always stood at the forefront of technological development and adopted the latest technology. In the process of developing products, lighter, thinner and smaller as the ultimate goals. It will push the enterprise develop advanced material and update the manufacturing craft. As the latest technology, laser technology is widely used in the 3C industry. The main applications of laser in 3C industry are: laser marking, laser cleaning, metal deep carving, drilling, etc.