fr 4 pcb, fr-4 pcb, fr4 pcb 2-layer FR4 PCB, 1.6mm d/sided PTHPrinted circuit board is a very important part of electronic devices. You will find them in all electronic appliances. To make a good quality PCB, it is very important to select high-grade materials. A PCB mainly consists of a NON-conductive material. Conductive lin ...