Do you know the difference between 2 layerFPC and multi-layer FPC?

 
Definition of 2 layer FPC and multi-layer FPC
2 layer FPC and multi-layer FPC are both types of flexible circuit boards, but they have obvious differences. 2 layer FPC is a flexible circuit board with a circuit layer between two substrate layers, so wiring can be carried out on both sides. This circuit board is suitable for occasions that need to connect different circuits, such as LED light strips, mobile phone screens, etc. Multi-layer FPC is further developed on the basis of double-sided FPC. It can carry out wiring between more substrate layers, so more complex circuit designs can be realized. Multi-layer FPC is suitable for occasions that require high-density wiring and high-speed transmission, such as computer motherboards, communication equipment, etc. In short, both 2 layer FPC and multi-layer FPC have their unique advantages in circuit design and application, and which circuit board to choose depends on actual needs.
 
The manufacturing process of 2 layer FPC and multi-layer FPC
2 layer FPC and multi-layer FPC in terms of manufacturing process and application. First of all, 2 layer FPC has only two layers of copper foil, while multi-layer FPC has three or more layers of copper foil. This means that multi-layer FPC can provide higher signal transmission speed and stronger electromagnetic shielding ability because it can reduce signal interference by adding a ground plane and power plane. Secondly, the process of manufacturing 2 layer FPC is relatively simple and only needs to be coated with copper foil on the substrate, photolithography, etching, drilling, covering the protective layer, and other steps to complete. While multilayer FPC requires more steps, such as stacking, pressing, drilling, plating, cutting, etc., so the manufacturing cost is higher. Finally, double-sided FPC is suitable for some simple circuit designs, such as LED strips, touch screens, etc. Multi-layer FPC is suitable for more complex circuit designs, such as high-speed transmission, high-density wiring, etc. In short, double-sided FPC and multi-layer FPC have their own advantages and application scenarios and must be selected according to specific requirements.
 
Application fields of 2 layer FPC and multi-layer FPC

There are obvious differences between 2 layer FPC and multi-layer FPC. 2 layer FPC means that on a flexible circuit board, circuit connections can be made on both sides. Compared with single-sided FPC, 2 layer FPC can achieve a more complex circuit design and is more efficient in space utilization. Double-sided FPC has a wide range of applications, such as mobile phones, tablet computers, electronic watches, and other consumer electronics products. Multi-layer FPC refers to the formation of a multi-layer circuit board by superimposing multiple double-sided FPCs on a flexible circuit board. Compared with double-sided FPC, multi-layer FPC can achieve higher density circuit design, and can also realize multiple functions such as signal layer, power layer, and ground layer on the same circuit board. The application fields of multilayer FPC are mainly concentrated in high-end electronic products, such as aerospace, medical equipment, and other fields. In short, both 2 layer FPC and multi-layer FPC are important forms of flexible circuit boards. Their application fields have their own strengths and have broad market prospects.