Rigid circuit boards include phenolic paper laminates, epoxy paper laminates, polyester glass mat laminates and epoxy glass cloth laminates.
The flexible circuit board is also called FPC or soft board. It has the characteristics of high wiring density, light weight and thin thickness. It is a highly reliable and excellent flexible printed circuit board.
Flexible circuit boards are widely used in electronic computers, communications, aerospace and household appliances industries.
In PCB proofing, what are the differences between flexible PCB circuit boards and rigid circuit boards?
1. The current carrying capacity of the wire: Compared with the rigid circuit board, the heat dissipation performance of the flexible circuit board is relatively poor. Because the heat dissipation of the flexible circuit board is considered, it is necessary to leave extra width or spacing for the wires.
2. Shape. Under normal circumstances, choosing a rectangle can save the substrate well, and there should be enough usable margin near the edge. Sharp inner corners may cause the board to tear. Therefore, the FPC wire width and spacing should be minimized, and the transition must be as smooth as possible. Sharp corners will naturally concentrate stress and lead to lead failure.
3. Flexibility: The flexibility of rigid circuit boards cannot be compared with Flexible PCB.jpg)
circuit boards. For a large number of bending cycles, flexible circuit boards have better performance.
