Introduction to FPC connector of FPC soft circuit board

The battery fpc flexible printed circuit connector on the market is abbreviated as FPC connector. They have the characteristics of high cable density, portability and thin, so they are called soft circuit boards, soft printed circuit boards or flexible circuit boards. Most FPC connectors are made of polyimide (PI) or polyester film (PET), which improves the reliability of FPC connectors. This article mainly introduces FPC connector of soft circuit board by Xinpengbo!

In fact, FPC connectors may vary depending on how the raw materials and copper cladding are connected. Therefore, FPC can be divided into two main types: 3-layer FCCL and 2-layer FCCL. Each of the two models has its advantages and disadvantages.

The 2-layer FCCL has greater flexibility. The cost of widely using the 2-layer FCCL as raw material in the market is too high. In contrast, the 3-layer FCCL is much cheaper and usually used in the market. However, the flexibility and flatness parameters of the pad are not as good as those of the 2-layer FCCL, so there may be welding defects such as cracks, which should be avoided as far as possible by the manufacturer.

As 3-layer FCCL is more common in the market, more and more connector manufacturers adopt it and develop it better. Two different types of FCCLs can be classified according to the number of copper foil layers, including multilayer board, double-sided board, single-layer board and double-layer board.

Single layer board has the simplest structure. Connector manufacturers usually use structures including raw materials, transparent plastic and copper foil. Some FPC connector manufacturers use a layer of protective plastic and transparent plastic. The structure can greatly improve the mechanical strength of the three-layer FCCL.

Double layer structure is used for complex circuits that cannot be wired or shielded. Multilayer board is different from single layer board in VIA structure, which can effectively connect different layers of copper foil. Double panel is welded on both sides, mainly used to connect other circuit boards. In addition, the FPC connector can be used in MP3 and MP4 players, digital cameras, mobile phones and mobile phone batteries. The future development prospect of the FPC connector is very good.