The installation and welding of surface assembly parts are mainly divided into two basic technology methods, which are solder paste - reflow welding process - patch glue - wave soldering process
SMT patch processing solder paste need to pay attention to: 1, constant temperature: 2, delivery: 3, freezing :4, situation: 5, applied old solder paste :6, on the steel net paste amount:
Several parts of the circuit board are mainly: 1. Bare copper plate: 2. Gold plate: 3. Spray tin circuit board: 4. OSP process board is also called organic welding film in SMT factory.
Circuit board composition: 1, welding plate: 2, layer number: 3, hole: 4, components: 5, wiring: 6, silk screen: 7, welding resistance layer: 8, positioning hole: 9, filling: 10, electrical boundary:
Precautions for applying three anti - paint:1, can not let the PCB circuit board surface dripping, fluid paint, semi-humid phenomenon, 2, should ensure that the three anti paint uniform, bright, smooth, 3, can not let the surface of the paint layer of pin
SMT patch processing PCBA overhaul includes what aspects: ① Check the electronic devices, each spot welding electronic devices are not wrong version, leakage, reverse problem exists, ② spot welding welding is not smooth, there is no abnormality, ③ query d
necessary to set up professional testing equipment in each process and strictly control the quality of the process
SMT patch processing what solder paste:First, there are lead and lead-free solder paste, two, high temperature solder paste, medium temperature solder paste, low temperature solder paste, three, tin powder particle size
SMT machining components are repaired: 1. Chip components welding disassembly, 2. Pad cleaning, 3. Assembly and welding of chip components
First, clean up the soldering iron head, second, fast: before the flux on the solder evaporates, to complete all the welding work, three, quasi: when sticking the components, be sure to let the components as close to the tip of the iron head position, fou
How to improve the welding hole of PCBA:(1) The PCB and parts will be exposed in the air for a long time to avoid moisture, (2) control the welding paste with moisture, It is very easy to cause skin pores and tin beads, (3) the environmental humidity cont
Circuit board testing and printing pcb circuit boards are initially applied in paper-based copper-covered circuit boards. Since the appearance of semiconductor material audion in the 50's of the 20th century, the demand for circuit boards has increased si
