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Home Appliances Circuit Boards Introduce the Classification of Flexible Printed Circuit Boards

Shenzhen Inno Circuit Co.,Ltd | Updated: Jun 08, 2018

Home Appliances Circuit Boards Introduce the Classification of Flexible Printed Circuit Boards


Flexible printed circuit board, also known as flexible circuit board, flexible circuit board, flexible circuit board, soft board, English is FPC (abbreviation of Flexible Printed Circuit), is a kind of special printed circuit board. It is characterized by its light weight, thinness, softness and flexibility. Mainly used in mobile phones, laptops, PDAs, digital cameras, LCD screens and many other products. The

What are the classifications of flexible printed circuit boards? The Shenzhen circuit board factory will introduce them to you. The

At present, there are mainly four types of flexible circuits: single-sided, double-sided, multi-layer, and rigid flexible circuit boards. The

1 Single-sided flexible board is the lowest cost printed board when the electrical performance is not high. In the single-sided wiring, one-sided flexible board should be used. It has a layer of a chemically etched conductive pattern, and the conductive pattern layer on the surface of the flexible insulating substrate is a rolled copper foil. The insulating substrate may be polyimide, polyethylene terephthalate, aramid fiber ester, and polyvinyl chloride. The

2 double-sided flexible board is a conductive pattern made by etching on both sides of the insulating base film. The metallization holes connect the patterns on both sides of the insulating material to form conductive paths to meet the design and use functions of flexibility. The cover film protects single and double conductors and indicates where the components are placed. The

3 multilayer flexible board laminates three or more layers of single-sided or double-sided flexible circuits together to form metalized holes through drill collars L and electroplating to form conductive paths between layers. This eliminates the need for complex welding processes. Multilayer circuits have huge functional differences in terms of higher reliability, better thermal conductivity and more convenient assembly performance. When designing the layout, consideration should be given to the interplay between assembly dimensions, layers, and flexibility. The

4 Conventional rigid-flex panels consist of a laminate of rigid and flexible substrates selectively laminated together. The structure is tight, with the metallization L forming a conductive connection. If there is a component on the front and back of a printed board, a rigid flexible board is a good choice. However, if all the components are on one side, it is more economical to use a double-sided flexible board and laminate a layer of FR4 reinforcement on the back.