Flexible printed circuit board
Flexible circuits are designed to improve space utilization and product design flexibility, meet the design needs of smaller and higher density installations, and help reduce assembly processes and enhance reliability.It is the only solution to meet the requirements of miniaturization and movement of electronic products.
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Printed Circuit Board divided by character, there are rigid PCB, Flexible PCB, and rigid & flex PCB. Rigid PCB is a kind of electronic circuit relative cheap and used most frequently. It is widely used in consumer electronic products, electrical appliances, small appliances, telecommunications, automotive, medical equipment (such as mobile phones, phone, LED lighting, TV, DVD, computer products and peripherals, game consoles, chargers, adapters, remote control and other home appliances ...) ect.
Flexible circuits can move, bend, and twist without damaging the wires, and can have different shapes and special package sizes.The only limitation is volume and space.Because it can withstand millions of times of dynamic bending, flexible circuits can be well suited for continuous motion or regular motion in internal connected systems as part of the final product's functionality.Some products that require the electrical signal/power to move while the shape factor/package size is smaller benefit from flexible circuits.
Flexible circuits provide excellent electrical performance.Lower dielectric constant allows fast transmission of electrical signals;Good thermal performance makes the components easy to cool down.The higher glass transition temperature or melting point makes the components work well at higher temperatures.
By reducing the hardware required by the internal connection, such as conventional solders, trunks, floor lines and cables used in traditional electronic packaging, flexible circuits can provide higher assembly reliability and yield.Because of the complex system composed of traditional interconnect hardware when assembling, easy to appear high component dislocation rate.With the advent of mass engineering, a very thin flexible system was designed to be assembled in only one way, eliminating the human error that is usually associated with independent wiring projects.
The early flexible circuit was mainly used in small or thin electronic products and rigid PCB connections.In the late 1970s, it was used in computers, digital cameras, inkjet printers, car stereos, CD drives (see figure 10, 1) and hard drives.Open a 35mm camera with 9 to 14 different flexible circuits.The only way to reduce volume is to have smaller components, more precise lines, tighter pitch, and flexible objects.Pacemakers, medical devices, video cameras, hearing AIDS, laptops -- almost everything in use today has flexible circuits.