Printed Circuit Board Materials
Printed circuit board are made of a variety of materials and compounds. Copper-based conductors are mounted on a variety of PCB materials based on the physical and thermal properties required for the operating environment and the particular application.
The design starts with a bare schematic and evolves with the addition of conductive traces and components increase. CAD design includes all the major work, such as tracking optimization, component layout, and routing. It also does advanced tasks like stress simulation and load testing. Autodesk’s Eagle Candance’s OrCAD and Altium are the major CAD suits for the design process. There are numerous other tools to design PCBs, most of which are free and open source.
Copper is a popular choice as a base material, such as epoxy glass and high strain plastics. But various other compounds are also used to preserve the copper and components.. Modern electronic devices compress huge volume of tiny components into small size, so the rigidity and flexibility of the base material can be improved Multi-layer printed circuit board consists of multiple thin layers of epoxy glass with high adhesion to withstand the forces implied on them. The materials are also carefully selected to be thermally conductive to maintain an even thermal profile through the board.
Some PCB boards are made of metal to meet the rigid requirements for heat dissipation. LED circuits mostly use metal bases because they are predominantly SMDs and generate more heat due to the high forward voltage. In some applications, flexible copper tape is also placed on the plastic film to reduce wiring space and facilitate the connection on the mobile platform. They are mostly preferred for data lines than power.