Flat flex PCB is a copper circuit (U) printed on a PI polyimide or PE polyester film substrate and pressed with adhesive.
FPC has many advantages, the core of which is its reliability and flexibility. Since the FPC is made of flexible materials such as polyimide or polyester, it can work at different bends without breaking or failing due to excessive bending. At the same time, the FPC also has good high and low temperature resistance, which makes it work in extreme environments from -200 °C to +350 °C.
FPC also has high accuracy; it can achieve fine spacing of the line and can accommodate more components in the same area, thus improving the performance of the circuit board. At the same time, flexible board also supports multi-layer line design, which can meet more design needs. In addition, FPC can use surface mount technology in the production process, and the chip can be directly pasted on the circuit board, saving the cumbersome connection work in PCB production.
Advantages of FPC flexible board:
1. Flexibility
One of the significant advantages of using flexible board is that it can be easily routed and assembled in 3D space, and can also be curled or folded for use. As long as it is curled within the allowable radius of curvature, it can withstand thousands to tens of thousands of uses without damage.
2. Reduce the volume
In the assembly of components, compared with the use of wires, the conductor cross-section of FPC flexible board is thin and flat, which reduces the size of the wire, and can be formed along the casing, making the structure of the equipment more compact and reasonable and reducing the volume of assembly. Compared with rigid PCB, the space can be saved by 60~90%.
3. Reduce weight
In the same volume, the weight of FPC flexible board can be reduced by about 70% under the same current carrying capacity compared with wire and cable and by about 90% less than that of rigid PCB.
4. Consistency of assembly
The FPC flexible board is used to eliminate errors when wiring wires and cables. As long as the machining drawings are proofread, all the winding circuits produced later are the same. There will be no disconnections when installing the cable.
Increased reliability
5. Controllability of electrical parameter design
According to the use requirements, designers can control capacitance, inductance, characteristic impedance, delay, and attenuation when designing FPC flexible boards. It can be designed to have the characteristics of a transmission line. Because these parameters are related to the wire width, thickness, spacing, insulation thickness, dielectric constant, loss tangent, etc., it is difficult to do so when using wire and cable.
6. The end can be soldered as a whole
Like rigid PCBs, FPC flex boards have terminal pads that eliminate wire stripping and tinning, resulting in cost savings. The terminal pad is connected to components, devices, and plugs and can be replaced by dip soldering or wave soldering instead of manual soldering of each wire.
7. The use of materials is optional
FPC flexible board can be manufactured with different substrate materials according to different use requirements. For example, polyester film can be used in assembly applications where low cost is required. In demanding applications where excellent properties are required, polyamide films can be used.
8. Low cost
The use of FPC flexible boards can reduce the total cost.
Due to the consistency of various parameters of the wires of the flexible circuit board, integral termination is implemented, which eliminates the errors and rework that often occur when the cable conductors are assembled, and the replacement of the FPC flexible board is more convenient.
The application of FPC flexible board simplifies the structural design; it can be directly adhered to the component, and the wire clamp and its fixing parts are reduced.
For wires that need to be shielded, FPC flexible boards are less expensive.
9. Continuity of processing
Since flexible foil-clad laminates can be supplied continuously in rolls, continuous production of flexible PCB is possible. This is also good for keeping costs down.
Group Profile
Zhuhe Group is a full-service EMS service provider, always with customer satisfaction as the purpose, is committed to providing our customers with high-quality products and services. The company's management is standardized and professional, with strong R&D strength and high-quality manufacturing capacity, to provide customers with comprehensive services.
As a professional manufacturer of mid-to-high-end FPC & FPCA production and services, Zhuhe Group has invested 150 million yuan to build a one-stop FPC & FPCA production line, with automatic production lines such as automatic imported exposure machine and imported vacuum two-fluid DES. Combined with the concept of Industry 4.0, Zhuhe Group is committed to creating high-quality and high-end products for customers and realizing the company's overall product competitive advantage.
With R&D as the core driving force, the Group continues to innovate and improve product quality and service quality. The company provides customers with one-stop service, and has excellent capabilities in design, procurement, manufacturing, etc., to build a complete ecological chain of PCBA. The company realizes the sustainable development of the enterprise, and at the same time brings more benefits to customers and the industry.
Our services cover a wide range of fields, including component procurement, processing and manufacturing, and rework of complex packaging devices. The company has achieved comprehensive green design, processing and production, and has contributed to the protection of the environment.
Q: What is the difference between flexible circuit board and hard board circuit board?
A: Aside from the flexibility and bendability mentioned earlier, FPC flexible and rigid circuit boards are not particularly different. They are both made of conductive materials and can both be used in circuit design. Unlike rigid circuit boards, flexible circuit boards require the support of an electronic assembly process to work stably.
Q: In terms of circuit board design, do FPC flexible boards and rigid circuit boards need to consider some special factors?
A: Compared with the rigid circuit board, the circuit design of FPC flexible board needs to consider some different factors. For example, it is necessary to ensure that tin paste and other conductive materials are used as little as possible to ensure the flexibility of the circuit. In addition, flexible connectors and flexible incoming cabling plans are required. In the selection of integrated circuits and components, it is also necessary to pay attention to weight.
Q: In which areas may flat flex PCB be used?
A: FPC flexible boards can be used in many types of electronic products, such as smartphones, tablets, handheld devices, laptops, digital cameras, game consoles, and more. In addition, FPC flexible boards are also widely used in automotive, healthcare, security systems, industrial control and other fields.
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