Parts mounting and welding

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Parts mounting and welding

Parts mounting and welding

The last step is to install and solder the parts. Both THT and SMT parts are machined to be placed on the PCB.

THT parts are usually soldered in a way called Wave Soldering. This allows all parts to be soldered to the PCB at a time. First cut the pin close to the board and bend it slightly to allow the part to be fixed. The PCB is then moved to the water flux of the co-solvent and the bottom is contacted with a co-solvent so that the oxide on the bottom metal can be removed. After heating the PCB, this time it is moved to the molten solder and the soldering is completed after contact with the bottom.

The way to automatically weld SMT parts is called Over Reflow Soldering. The paste solder containing the solvent and the solder is processed once after the parts are mounted on the PCB, and then processed after being heated by the PCB. After the PCB is cooled, the soldering is completed, and the next step is to prepare for the final testing of the PCB.

Proofing

The Chinese name of the PCB is a printed circuit board, also known as a printed circuit board. The printed circuit board is an important electronic component that is a support for electronic components. It is a provider of electrical connections for electronic components. Because it is made by electronic printing, it is called a "printing" circuit board.

PCB proofing refers to the trial production of printed circuit boards before mass production. The main application is for PCB engineers to design a good circuit and complete the PCB Layout and then perform small-scale trial production to the factory. The production quantity of PCB proofing generally has no specific boundary. Generally, engineers call it PCB proofing before the product design is completed and confirmed.