Application and Development of FPC Circuit Board
FPC (flexible circuit board) is a kind of PCB, also known as "soft board". FPC is made of flexible substrates such as polyimide or polyester film. It has the advantages of high wiring density, light weight, thin thickness, flexibility, and high flexibility. It can withstand millions of dynamic bending without damaging the wires. , According to the space layout requirements, it can move and expand arbitrarily, realize three-dimensional assembly, and achieve the effect of component assembly and wire connection integration. It has advantages that other types of circuit boards cannot match.
Mobile phone: focus on the light weight and thin thickness of the flexible circuit board. It can effectively save the product volume, easily connect the battery, the microphone, and the buttons into one.
Computer and LCD screen: Use the integrated circuit configuration of the flexible circuit board and the thin thickness. The digital signal is converted into a picture, which is presented through the LCD screen;
CD Walkman: Focus on the three-dimensional assembly characteristics and thin thickness of flexible circuit boards, turning a huge CD into a good companion to carry;
Disk drive: Whether hard disk or floppy disk, it is very dependent on the high flexibility of FPC and the ultra-thin thickness of 0.1mm to complete fast reading of data, whether it is PC or NOTEBOOK;
Newest applications: components such as suspension circuits and packaging boards of hard disk drives (HDD).
Based on the vast FPC market in China, large companies in Japan, the United States, and Taiwanese countries and regions have all set up factories in China. Flexible circuit boards, like rigid circuit boards, have achieved great development. However, if a new product follows the rule of "start-development-climax-decline-elimination", FPC is now in the area between climax and decline. Before there is a product that can replace flexible boards, flexible boards must continue to occupy market share , It must be innovative, and only innovation can make it jump out of this vicious circle.
1. Thickness. The thickness of FPC must be more flexible and must be thinner;
2. Folding resistance. The ability to bend is an inherent characteristic of FPC. In the future, FPC must be more resistant to folding, which must exceed 10,000 times. Of course, this requires a better substrate;
3. Price. At this stage, the price of FPC is much higher than that of PCB. If the price of FPC comes down, the market will be much broader.
4. Process level. In order to meet various requirements, the FPC process must be upgraded, and the minimum aperture and minimum line width/line spacing must meet higher requirements.