PCB Laminates

PCB laminates are the base materials used in printed circuit boards (PCBs), consisting of layers of fiberglass cloth combined with resins like epoxy. These laminates often include a layer of copper foil for creating the circuit patterns. The most common type, FR4, uses woven fiberglass and epoxy resin, providing mechanical support and electrical insulation.
PCB laminate manufacturing involves layering fiberglass and resin and curing them under heat and pressure to form solid sheets. Copper foil is laminated onto these sheets, serving as the conductive layer where circuit patterns are etched. The properties of the laminate, such as thermal stability and dielectric constant, affect the PCB's performance and reliability.
Different applications require specific laminates to meet various electrical, thermal, and mechanical needs. For example, high-frequency circuits may use PTFE laminates for lower dielectric losses, while industrial applications might need laminates with better thermal properties.