FPC Membrane Panel

Flexible Printed Circuit, or FPC for short, is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film. It has the characteristics of high wiring density, light weight, thin thickness and good bendability.

FPC is a technology developed by the United States for the development of aerospace rocket technology in the 1970s. It is a highly reliable and extremely flexible printed circuit made of polyester film or polyimide. By embedding a circuit design on a thin and flexible plastic sheet, a large number of precision components can be stacked in a narrow and limited space, thereby forming a flexible circuit that can be bent. This kind of circuit can be bent and folded at will, light weight, small size, good heat dissipation, convenient installation, breaking through the traditional interconnection technology. In the structure of flexible circuits, the constituent materials are insulating films, conductors and adhesives.

Advantages of FPC:

A flexible printed circuit board is a printed circuit made of a flexible insulating substrate, which has many advantages that rigid printed circuit boards do not have:

1. It can be bent, wound, and folded freely, and can be arbitrarily arranged according to the spatial 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. The use of FPC can greatly reduce the volume and weight of electronic products, which 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, PDA, digital cameras and other fields or products;

3. FPC also has the advantages of good heat dissipation and solderability, easy assembly and connection, and low comprehensive cost. 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.

Disadvantages of FPC:

1. High one-time initial cost: Since flexible PCBs are designed and manufactured for special applications, the initial circuit design, wiring and photographic negatives are expensive. Unless there is a special need to apply a flexible PCB, it is usually best not to use it in a small amount of application;

2. It is difficult to change and repair the flexible PCB: once the flexible PCB is made, it must be changed from the base map or the compiled light drawing program, so it is not easy to change. The surface is covered with a layer of protective film, which must be removed before repairing and restored after repairing, which is a relatively difficult work;

3. The size is limited: when the flexible PCB is not yet common, it is usually manufactured by a batch process, so it is limited by the size of the production equipment and cannot be made very long or wide;

4. Improper operation is easy to damage: Improper operation of the installation and connection personnel can easily cause damage to the flexible circuit, and its soldering and rework need to be operated by trained personnel.

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