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What is the PCB assembly?

PCB assembly is the process of soldering various electronic components (such as resistors, capacitors, integrated circuits, etc.) onto the surface of a printed circuit board (PC to complete circuit connections and functionality. During PCB assemblies, electronic components are typically affixed to the PCB surface using surface mount technology (SMT) or through-hole soldering technology, and then connected to the PCB surface using soldering methods such as wave soldering, reflow soldering, etc.