Types of flexible circuit boards _ Advantages and applications
2023-07-22
A flexible circuit board (FPC) is a circuit board based on a polyimide film or polyamide film, which is characterized by flexibility and bendability.
Compared with traditional rigid circuit boards, flexible circuit boards have higher reliability, better vibration resistance and smaller size. Therefore,
in many fields, flexible circuit boards have replaced traditional rigid circuit boards and become an essential part of electronic products.
First, the type of flexible circuit board
Flexible circuit boards are mainly divided into two types: single-sided flexible circuit boards and double-sided flexible circuit boards. Among them,
the single-sided flexible circuit board has a circuit on one side only, and the double-sided flexible circuit board has a circuit on both sides. In addition,
there are multi-layer flexible circuit boards, the number of circuit layers can reach more than four layers.
Second, the advantages of flexible circuit boards
1, bability: flexible circuit boards can be bent to a certain extent, suitable for complex three-dimensional structures, especially in miniaturized electronic
products are widely used.
2, light weight: compared with the traditional rigid circuit board, the flexible circuit board is lighter.
3, small size: Because the flexible circuit board can be folded and bent, its size can be smaller, can be applied to more compact electronic products.
4, high reliability: The flexible circuit board uses polyimide film or polyamide film as the substrate, this material has excellent mechanical properties and
chemical stability, so the reliability of the flexible circuit board is higher.
5, good vibration resistance: flexible circuit boards can adapt to vibration and shock in various environments, so good vibration resistance.
6, space saving: Flexible circuit boards can be placed tightly together circuit wiring, thereby saving space, can be applied to more compact electronic
products.
Third, the application of flexible circuit boards
1, mobile phones and tablets: Flexible circuit boards are widely used in mobile phones and tablets, such as connecting display screens and motherboards,
connecting cameras and motherboards.
2, digital camera: Flexible circuit boards have also been widely used in digital cameras, such as connecting the display screen and the motherboard,
connecting the battery and the motherboard.
3, automotive electronics: Flexible circuit boards are also more and more widely used in automotive electronics, such as connecting car audio and TV,
connecting car navigation and motherboard.
4, medical equipment: Flexible circuit boards are also more and more widely used in medical equipment, such as connecting medical sensors and
motherboards,connecting medical devices and motherboards.
5, LED lighting: The application of flexible circuit boards in LED lighting is also more and more extensive, such as connecting LED lights and power
supplies,connecting LED lights and LM2903MX controllers.
Fourth, the manufacturing process of flexible circuit board
The manufacturing process of flexible circuit board mainly includes the following steps:
1, printed circuit: Printed circuit pattern on polyimide film or polyamide film.
2, electroplating: electroplating a layer of copper on the conductive circuit pattern.
3, drilling: drilling on the circuit board, used to connect between the various circuits.
4, metallization: through chemical treatment on the circuit board, the copper layer is connected with other metal layers.
5, cutting: cut the circuit board into the desired shape and size.
6. Test: Test the manufactured flexible circuit board to ensure that it meets the specifications.
2, electroplating: electroplating a layer of copper on the conductive circuit pattern.
3, drilling: drilling on the circuit board, used to connect between the various circuits.
4, metallization: through chemical treatment on the circuit board, the copper layer is connected with other metal layers.
5, cutting: cut the circuit board into the desired shape and size.
6. Test: Test the manufactured flexible circuit board to ensure that it meets the specifications.
Five. Development Trend
With the continuous development of the consumer electronics market, the demand for flexible circuit boards is also increasing, and the future development
trends are mainly as follows:
1. Thinner and thinner
With the pursuit of thin and light consumer electronics products, the thickness of flexible circuit boards is also decreasing year by year. At present, the
thickness of the flexible circuit board can be less than 0.1 mm, and with the continuous improvement of technology, the thickness of the flexible circuit board
will be thinner in the future.
2. Getting smaller and smaller
As electronics continue to shrink, flexible circuit boards also need to get smaller. In the future, the line width and line spacing of flexible circuit boards will
continue to shrink to meet the needs of miniaturization of electronic products.
3. High reliability
With the wide application of flexible circuit board in electronic products, the requirement of its reliability is getting higher and higher. In the future, flexible
circuit boards will use more high-end materials and manufacturing processes to improve their stability and reliability.
4, independent production
At present, the production of flexible circuit boards is mainly concentrated in the Asian region, relying on a few large electronic manufacturers. In the future,
At present, the production of flexible circuit boards is mainly concentrated in the Asian region, relying on a few large electronic manufacturers. In the future,
with the increasing demand for flexible circuit boards, more and more enterprises will begin to independently produce flexible circuit boards to reduce costs
and improve production efficiency.
5, environmental protection
With the continuous improvement of global environmental awareness, the production of flexible circuit boards will pay more attention to environmental
With the continuous improvement of global environmental awareness, the production of flexible circuit boards will pay more attention to environmental
protection in the future.For example, the use of more environmentally friendly materials, manufacturing processes, recycling and other ways to reduce the
impact on the environment.
In short, with the continuous development of the consumer electronics market, the application of flexible circuit boards in electronic products will be more
and more extensive,and the future development trend will be more diversified and intelligent.