FPC: Flexible Printed Circuit in English. It is made into conductor circuit patterns by using light imaging pattern transfer and etching processes on the surface of a flexible substrate. The surface and inner layers of double-sided and multilayer circuit boards are electrically connected through metalized holes. , The surface of the circuit pattern is protected and insulated by PI and glue layer.

Mainly divided into single-sided board, hollow board, double-sided board, multi-layer board, flexible and hard board.

1. Features of flexible circuit boards

1.1 Short: short assembly time

All lines are configured, eliminating the need to connect redundant cables;

1.2 Small: Smaller than PCB (hard board)

It can effectively reduce the product volume and increase the convenience of carrying;

1.3 Light: lighter than PCB (hard board)

Can reduce the weight of the final product;

1.4 Thin: thickness is thinner than PCB (hard board)

It can improve the softness and strengthen the three-dimensional assembly in a limited space.

2. The advantages of flexible circuit boards

Flexible printed circuit boards are printed circuits made of flexible insulating substrates, and have many advantages that rigid printed circuit boards do not have:

2.1 It can be bent, wound, and folded freely, and can be arranged arbitrarily according to the space layout requirements, and can be moved and stretched arbitrarily in three-dimensional space, so as to achieve the integration of component assembly and wire connection;

2.2 The use of FPC can greatly reduce the volume and weight of electronic products, and is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. Therefore, FPC has been widely used in aerospace, military, mobile communications, laptop computers, computer peripherals, PDAs, digital cameras and other fields or products;

2.3 FPC also has the advantages of good heat dissipation and solderability, easy assembly and low overall cost, and the design of soft and hard combination also makes up for the slight deficiency of the flexible substrate in the component carrying capacity to a certain extent.

3. Main raw materials of FPC

The main raw materials right: 1. base material, 2. cover film, 3. reinforcement, 4. other auxiliary materials.

4. FPC types have the following 6 distinctions:

4.1 Single panel: Only one side has wiring.

4.2 Double panel: There are lines on both sides.

4.3 Hollow board: also known as window board (opening on the finger surface).

4.4 Layered board: two-sided circuit (separate).

4.5 Multilayer boards: circuits with more than two layers.

4.6 Rigid-flex board: a product that combines soft board and hard board.