What are the common types of FPC flexible circuit boards?
The information comes from:the Internet posted on:2023-04-19
Common types of FPC flexible circuit boards
At present, there are four types of FPC flexible circuit boards: single-sided, double-sided, multi-layer flexible circuit boards, and rigid flexible combination circuit boards.
1. A single-sided flexible circuit board is a printed board for cost sensitive words, while a circuit board is a printed board for cost sensitive words. When single sided wiring, a single sided flexible circuit board should be selected. It has a layer of chemically etched conductive patterns, and the conductive pattern layer on the surface of the flexible insulation substrate is rolled copper foil. The insulation substrate can be polyimide, polyethylene terephthalate, aramid fiber ester and PVC.
2. A double-sided flexible circuit board is a conductive diagram formed by etching one layer on each side of the insulating substrate. Metal holes connect the graphics on both sides of the insulation material to form conductive channels to meet flexible design and usage functions. Covering film can protect single and double sided wires and indicate the position of components.
3. Multilayer flexible circuit boards are three or more layers of single-sided or double-sided FPC flexible circuit boards that are laminated together, drilled L, and electroplated to form metal holes, forming conductive paths between different layers. This way, there is no need to use complex welding processes. Multilayer circuits have significant functional differences in terms of higher reliability, better thermal conductivity, and more convenient assembly performance. When designing the layout, the mutual influence of assembly size, number of layers, and flexibility should be considered.
4. Traditional rigid and flexible combination circuit boards are composed of rigid and flexible substrates. The structure is tight, and the conductive connection is formed by the individual L of the metal. If the printed board is positive and has components on the back, rigid and flexible circuit boards are a good choice. But if all components are on one side, choosing a double-sided flexible circuit board and laminating a layer of FR reinforcement material on the back would be more economical.
5. A hybrid structure FPC flexible circuit board is a multi-layer board composed of different metals, using an 8-layer board. FR-4 is used as the inner medium, and polyimide is used as the outer medium. The conductors extend from three different directions of the main board. Each conductor is made of different metals. Constantan alloy, copper, and gold are used as separate wires. This hybrid structure is mainly used for the relationship between electrical signal conversion and thermal conversion, as well as for low temperatures with poor electrical performance, and is a feasible solution. The convenience and total cost of internal connection design can be evaluated to achieve the cost-effectiveness of [sensitive words].
Enter mobile website