In the electronic manufacturing industry, there is not only PCB hard boards, but also a type of board that is flexible, abbreviated as FPC, which is a special type of soft board based on polyimide or polyester film and made into circuit boards through precision printing technology. Due to its high reliability, good flexibility, and lightweight softness, it is widely used in many electronic products such as mobile phones, laptops, PDAs, digital cameras, and automobiles.
1、 The main components of FPC are:
1. Insulation film: As the basic layer of the circuit, it not only serves as insulation, but also is responsible for bonding copper foil. In multi-layer design, it can also serve as a protective covering layer to prevent the circuit from being affected by dust and moisture, and to reduce stress during bending.
2. Conductors: Copper foil is the main conductor material in flexible circuits. It can be made by electrodeposition (ED) or plating, and has flexibility and conductivity. The surface of copper foil can be treated to a glossy or dull matte form to meet different bonding needs.
3. Adhesive: In addition to being used to bond insulating films to conductive materials, adhesive can also serve as a covering layer, providing protection and insulation functions. The covering and coating of adhesives usually use screen printing technology.
4. Covering film protective film: used for surface insulation, with common thicknesses of 1mil and 1/2mil. It protects the circuit from external interference and enhances its durability.
5. Reinforcement plate: used to enhance the mechanical strength of FPC and facilitate surface installation operations. The common thickness ranges from 3mil to 9mil.
2、 FPC basic structure
The basic structure of FPC includes copper foil substrate, copper foil, substrate film, adhesive, and cover film protective film. These materials are combined together through specific processes to form highly reliable and flexible circuit boards.
Summary: FPC flexible circuit boards, with their unique material and structural characteristics, meet the requirements of high-density wiring, lightweight, and thinness, and are widely used in various electronic products. Understanding its constituent materials and characteristics is of great significance for better application and development of flexible circuit board technology. Shenzhen Xinfeijia Technology Co., Ltd. has always provided PCBA circuit board processing and FPC flexible circuit board processing services for the manufacturing industry, contributing to the field of electronic manufacturing.
