How to distinguish flexible circuit board from rigid circuit board

- May 15, 2020-

How to distinguish flexible circuit board from rigid circuit board

 

According to the materials, PCB can be divided into rigid pcb and flexible PCB.

Rigid circuit board includes phenolic paper laminate, epoxy paper laminate, polyester glass felt laminate and epoxy glass cloth laminate.

Flexible circuit board, also known as FPC, soft board, has the characteristics of high wiring density, light weight and thin thickness. It is a highly reliable and excellent flexible printed circuit board. 

FPC is widely used in electronic computer, communication, aerospace and home appliance industries. 

In PCB proofing, what are the differences between flexible PCB and rigid pcb?

 

1. Current carrying capacity of wire: compared with rigid circuit board, the heat dissipation performance of flexible circuit board is relatively poor. Because of the consideration of the heat dissipation of the flexible circuit board, it is necessary to leave extra width or spacing for the wires. 

2. Shape. In general, choosing a rectangle can save a lot of substrates, and there should be enough available margins near the edges. Sharp internal corners can cause the board to tear. Therefore, the width and spacing of FPC conductor shall be minimized, and the transition shall be as smooth as possible. The sharp angle will naturally concentrate stress and lead to lead failure.

3. Flexibility: the flexibility of rigid circuit board cannot be compared with that of flexible circuit board. For a large number of bending cycles, FPC has better performance.

 

The above is the difference between rigid circuit board and flexible circuit board.

In PCB proofing, both flexible circuit board and rigid flexible combination board belong to special technology, which has certain technical threshold and manufacturing difficulty. Jieduobang can do PCB proofing of flexible circuit board and rigid flexible combination board to meet customers' various PCB proofing needs. At present, in the flexible circuit board, jettobank can make 1-8 layers; the board thickness is 0.06-0.4mm; the minimum line width / distance of single and double layers is 2mil, the minimum line width / distance of multi layers is 3mil; the copper thickness is 0.33-2oz. In the rigid flexible combination plate, 2-8 layers can be made; the minimum size can be 50 * 60MM; the maximum size can be 238 * 440mm; the plate thickness is 0.4-2.0mm; the copper thickness is 0.33-2oz. Welcome customers to experience


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