FR4 PCB FR-4 PCB refers to the PCB processed with FR-4 copper clad laminate. It has good electrical insulation function, excellent processing performance and flame retardancy, so it is widely welcomed by the market. Almost all double-sided and multi-layer PCBs on the market use FR-4 material. At the same time, some special FR-4 PCBs are … Continue reading FR4 PCB