/Pcb manufacturing surface coating technics principle
Pcb manufacturing surface coating technics is the first important link of electronic product manufacturing technics. 60%~70% of defects come from coating technics in electronic product manufacturing technics . Therefore, the quality of Pcb manufacturing surface coating technics is one of the key factors which affect board qualified ratio.
Pcb manufacturing and printing coating technics include two main technics: coating soldering technics and coating SMT technics. The so-called pcb coating soldering technics uses the coating equipment and the stainless steel stencil to accurately apply the solder paste to the specified position on the PCB before the components are mounted on the PCB. Pcb manufacturing coating SMT technics by applying adhesive glue to a specified location on a PCB using SMT processing dispensing device or SMT processing printing device.
The Pcb surface coating technics is a technics technique used by pcb manufacturers to assemble pcb components and is also an important point coating manufacturing technics technique.
The above is the professional information provided by the pcb manufacturer.
① Prepare a actual product surface soldered pcb assembly board . Because printed solder paste and the PCB assembly board without soldering cannot fix the test end of the thermocouple, it is necessary to use the soldered actual product for testing. In addition, the test sample cannot be used repea...
Most military industrial enterprises in China use epoxy insulation varnish as a three-anticoating material, using traditional immersion, brushing and spraying processes. Because the output of military products is relatively small, many companies use manual operations. The main disadvantage of man...
Pcb prototypes samples need to be aged prior to solderability testing. Because the solderable surface of the component or PCB circuit board that has just been produced is generally not problematic, it will deteriorate due to oxidation after being stored for a period of time. The test must conside...