Printed circuit boards (PCBs) have steadily evolved over many decades to become a compact, efficient and critical component of a wide variety of machines, automobiles, computer terminals, PLCs and other electronic devices. In addition, they have had an unmatched influence on the introduction of new developments, technologies and inventions in the global electronics industry. Its compact size and high reliability in the electrical connection of individual electronic components of an electronic design underscore the complexity required to manufacture high quality PCBs.
Today, the most popular PCB assembly technique is Surface Mount Technology (SMT), which is a big improvement over previous assembly techniques, such as mounting through holes. In many ways, SMT assembly is now considered the gold standard of PCB assembly techniques. SMT has replaced other manufacturing processes to become the preferred choice of PCB fabrication for a number of reasons.
Prior to the widespread use of SMT assembly, point-to-point assembly and through holes were used; however, these techniques took a lot of time, as assemblers would need to weld the electrodes to the PCB structure and would also require connection wires, which not only take longer to weld but also change the way energy is transmitted across the PCB . The SMT solves these problems by soldering components on the surface of the PCB instead of connecting points through the hole. This simple innovation allows PCBs to be manufactured via automation, which is highly time-efficient.