Mobile Phone LCD Screen Quality Control Expert

Welding method for patch element

by:Kimeery     2020-03-21
One is manual welding, the method is to first tin the pad with an electric soldering iron, then clamp one end of the chip element with a tweezers, and fix the other end of the element on the corresponding pad with a soldering iron, remove the tweezers after the solder is slightly cooled, and then weld the other end of the component with a soldering iron. The second is machine welding. The method is to make a leaky steel mesh, print the solder paste on the circuit board, and then place the welded chip components by hand or machine mounting, finally, the patch components are welded by a high temperature welding furnace. Circuit board, circuit board, pcb board, pcb soldering technology in recent years, the development of electronic industry technology, can notice a very obvious trend is reflow soldering technology. In principle, traditional plug-in parts can also use reflow soldering process, which is commonly referred to as through-hole reflow soldering. Its advantage is that it is possible to complete all solder joints at the same time, so that the production cost is minimized. However, temperature sensitive elements limit the application of reflow soldering, whether it is plug-in or SMD. Then people turned their attention to the choice of welding. Selective welding can be used after reflow soldering in most applications. This will become an economical and effective welding method for completing the remaining plug-in assemblies and is fully compatible with future lead-free welding. Welding patch components generally need to plant tin air gun, clip, magnifying glass, solder paste, rosin oil or paste, etc. , patch component welding graphic tutorial, this is a necessary tool for welding patch, this is to prepare for welding, first heat the solder joint with a soldering iron, then clamp a patch and immediately pass, and then weld the other side after the patch is fixed! After welding the IC, first fix one foot of the patch IC on the PCB, then find a fine copper wire and rosin, like a brushed Apple, and put it on the IC foot! Use copper wire to absorb tin and finally wash with alcohol (With cotton swabs) You will find that the rosin will melt and disappear! Do some ending work
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