Almost since day one, one or another type of PCB was a necessary component in electronics. Earlier, it was used as mechanical support, where electronic components were attached and wired separately. Later from being only mechanical support, PCBs started providing electrical connectivity. Modern rigid PCBs are more than mechanical support and connectivity. They can integrate electronic components such as antennas, inductors, resistors, and capacitors. Modern PCBs are designed to spread thermal energy to keep parts cool. In some cases, PCBs are used as design elements, front and back panels. Rigid PCBs dominate because of their manufacturing simplicity, low cost, and high demand. Modern electronics have changed significantly due to the increasing demand for small, sophisticated, and efficient devices. Small devices tend to have weird shapes and are packed with loads of electronics, whereas conventional rigid PCBs fail to fill this niche as they cannot be bent or layered on top of each other without increasing the thickness of the device size. Earlier flex PCBs were used moderately in a limited number of applications due to increased expenses of limited manufacturing…
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