Application of laser in SIM card

    With the progress of science and technology and the gradual improvement of people's quality of life, mobile phones have become necessary personal items for people. A smartphone can help people instant communicate, take photos, use apps, play games and even pay for purchases. The SIM card plays an important role in the realization of these functions. The SIM card allows mobile phones to access network operators for communication services, and it is also a document for network operators to identify us. In the last decade, the evolution of the SIM card has also become a microcosm of technological progress.

   As the mobile phone gets bigger, the SIM card gets smaller and smaller. With the evolution of the SIM card, in order to make the small card fit with the standard interface, the card slot has also emerged. In this small card slot, there are also laser welding technology.

      Laser welding can be focused laser beam as welding energy, when the high intensity laser irradiation on the surface of the welding material, part of the light energy will be absorbed by the material and converted into heat energy, so that the material melting, so as to achieve the purpose of welding. The metal laser spot welding machine has the advantages of small heat affected zone, small thermal deformation and high weld quality.

    Compared with the traditional processing method, the laser welding machine has fast speed, high efficiency, good economic benefits, can obtain a large depth to diameter ratio, and a wide range of

applicable materials. In mobile phone applications, laser welding can also be used for PCB board welding, shell handset and antenna shrapnel welding, etc., with high efficiency, low cost, small 

deformation, wide application range and other advantages. The mobile phone focuses on more than 200 parts in a palm-sized place, and its processing and manufacturing technology can be 

regarded as one of the most difficult manufacturing technologies at the time.

    With the technological progress of the microelectronics industry and people's pursuit of personalized mobile phones, fine laser processing technology will play a more and more important role in

mobile phone manufacturing. The NL-SW400 high-speed galvanometer laser welding machine of Wonsan Technology has a small focus spot diameter, which ensures the power density and 

processing range of welding, especially suitable for precision laser welding of copper alloy, nickel alloy, stainless steel and other materials。