Printed Circuit Board is also known as PCB, which acts as the electrical connection provider for those electronic components. In addition, PCB is widely used in a variety of electronic and electrical devices such as TV, mobile phone, fridge, robot, recorder, CCTV camera, digital clock, X-Ray machine, etc.

PS: According to PCB layers, it can be divided into single board, two-side board, four layer board, six layer board and other multi-layer board;

While based on its base material, that is FPC(Flex PCB), FR4 (Rigid PCB), metal PCB, high frequency PCB, etc.