Why does the PCB warp in SMT chip - mounting processing? Five reasons and countermeasures.
1.It will hinder the installation of SMT electronic components, resulting in poor contact between the electronic components (including integrated chips) and the solder joints of the PCB board.
2.When all the electronic components are mounted, it is not easy to cut off the pins.
3.At the same time, during the wave soldering process, due to warping, some pads on the substrate cannot be connected to the solder surface.