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The 10 advantages of flexible PCB are revealed
With the continuous increase in the output ratio of flexible PCBs and the application and promotion of rigid-flex PCBs, it is now more common to add soft, rigid or rigid-flex when talking about PCBs, and say that it is a PCB with several layers. Generally, a PCB made of a flexible insulating substrate is called a flexible PCB or a flexible PCB, and a rigid-flex composite PCB is called a rigid-flex PCB. It meets the needs of today's electronic products in the direction of high density and high reliability, miniaturization, and light weight. It also meets the strict economic requirements and the needs of market and technology competition.
Next, the 10 advantages of flexible PCB will be introduced in detail:
1. Flexibility
A significant advantage of the application of flexible PCB is that it can be more convenient to wire and install in three-dimensional space, and it can also be crimped 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 times without being damaged.
2. Reduce the size
In the assembly and connection of components, the conductor cross-section of the flexible PCB is thin and flat compared with the use of conductive cables, which reduces the size of the conductor and can be formed along the casing, making the structure of the device more compact and reasonable, and reducing the size of the assembly. volume. Compared with rigid PCB, space can be saved by 60~90%.
3. Reduce weight
In the same volume, the weight of a flexible PCB can be reduced by about 70% compared with a wire and cable at the same current-carrying capacity. Compared with a rigid PCB, the weight can be reduced by about 90%.
4. Assembly and connection consistency
The flexible PCB is used to install the connection, which eliminates errors when wiring with wires and cables. As long as the processing drawings are proofread and passed, all the winding circuits produced later will be the same. There will be no wrong connection when installing the cable.
5. Increased reliability
When a flexible PCB is used for assembly and connection, because it can be routed on the three planes of X, Y, and Z, the transfer interconnection is reduced, the reliability of the entire system is increased, and the inspection of faults is convenient.
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6. Design controllability of electrical parameters
According to application requirements, designers can control capacitance, inductance, characteristic impedance, delay and attenuation when designing flexible PCBs. Can be designed to have the characteristics of a transmission line. Because these parameters are related to wire width, thickness, spacing, insulation layer thickness, dielectric constant, loss tangent, etc., this is difficult to do when using wire cables.
7. The end can be soldered as a whole
Flexible PCB, like rigid PCB, has terminal pads, which can eliminate wire stripping and tinning, thereby saving costs. The terminal pads are connected to the components, devices, and plugs. Dip soldering or wave soldering can be used to replace the manual soldering of each wire.
8. Material use is optional
Flexible PCB can be manufactured with different base materials according to different usage requirements. For example, polyester film can be used in assembly applications that require low cost. In demanding applications, excellent performance is required, and polyimide film can be used.
9. Low cost
With flexible PCB assembly, the total cost can be reduced. This is because:
1) Due to the consistency of the various parameters of the flexible PCB wires; the overall termination is implemented, which eliminates the errors and rework that often occur when the cable wires are installed and connected, and the replacement of the flexible PCB is more convenient.
2) The application of flexible PCB simplifies the structural design, it can be directly adhered to the component, reducing the clamp and its fixing parts.
3) For wires that need to be shielded, flexible PCBs are cheaper.
10. Continuity of processing
Since flexible foil-clad boards can be continuously supplied in rolls, continuous production of flexible PCBs can be realized. This also helps reduce costs.
