PCB Assembly plays an important role in the electronics manufacturing services industry. It involves the mounting of electronic components onto a Printed Circuit Board, which serves as the basic for the mechanical support and electrical connections between these components. The assembly process usually begins with applying solder paste to the PCB followed by the placement of components such as resistors, capacitors, transistors and integrated circuits etc.

Surface Mount Technology (SMT) is most widely used method for PCB assembly, where the components are placed directly on the surface of the PCB. Another method is Through Hole Technology (THT) where the components are inserted into the holes of the PCB and then soldered. Modern PCBs often use a combination of both SMT and THT techniques to accommodate different component types. Once all components are in place soldering is done by reflow soldering for SMT and wave soldering for THT. These processes will ensure reliable electrical connections between the components and the PCB.

To ensure the functionality and quality of the assembled PCBs, inspections and testing are carried out during the manufacturing process. The techniques used include Automated Optical Inspection (AOI) and In-Circuit Testing (ICT). The quality of PCB assembly plays an important role as it has a direct impact, on the performance and reliability of the electronic product in its final form.