Matters needing attention during flexible PCBA processing

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Flexible PCB connected to rigid PCB:
Flexible PCBs are easily deformed due to their thin and thin characteristics, so they cannot be directly assembled on SMT production lines like rigid PCBs. That is, in order to assemble the flexible PCB, the flexible PCB must be fixed on the substrate of the rigid PCB so that it can be disguised as a rigid PCB for assembly. The flatness, positioning accuracy and consistency of the substrate are the key factors to achieve product quality control, and also the key points of flexible PCB assembly.

Low density:
At present, the price of flexible PCB is relatively higher than rigid PCB. From a product cost perspective, most flexible PCBs are only used for connections between different functional modules. The number of components assembled on a flexible PCB is small and the distribution density is low, usually less than 50 components or even two connectors.

Flexible PCB is mainly used for light, small and thin electronic products such as mobile phones and digital cameras. The area of ​​the single-sided flexible PCB is not large, and the number of single-sided flexible PCB components is small. Therefore, in order to improve the assembly efficiency, most factories choose to use panels. After assembly, these flexible PCBs with different functions will be separated by v-cutting or v-scoring.

High requirements for product quality:
Because flexible PCBs are often used in environments that require repeated bending and precision control, the components assembled on them must be able to meet the requirements of their working environment, so the quality requirements of flexible PCBs in assembly such as clean, anti-soldering static measures and Reliability is usually much higher than the average rigid PCB. In addition, with the implementation of lead-free technology, flexible circuit board assembly challenges are also increasing.

High assembly costs:
Compared with rigid PCB components, flexible PCB components have many characteristics, such as greater investment in specific fixtures, long production cycles, relatively low equipment utilization, more parts and operators, and higher production environment and product quality requirements. This makes the total cost of flexible PCB assembly very high, especially the high initial investment cost.