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FR4 double-sided circuit board/Notes on the manufacturing process of FPC soft board
The production process of flexible FPC boards is actually similar to the process of rigid PCB soft boards. For some processes, there are completely different handling methods due to the soft characteristics of flexible FPC.
Most flexible printed circuit boards use a negative way. In the manufacture of FPC flexible cables, the handling and cleaning of flexible printed circuits are more important than the handling of rigid PCB boards.
Inaccurate washing or manipulation in violation of regulations can lead to failure in future product manufacturing. This is due to the sensitivity of the materials used in the flexible printed circuit, and the flexible printed circuit plays an important role in the manufacturing process.
The base material is affected by various factors, the bottom copper is also damaged at the same time, and the delay department ensures the maximum flexibility.
In the production and production of single-sided flexible circuit boards, it is necessary to wash at least three times, while the multilayer FPC needs to be washed at least 3-6 times because of its larger size.
In comparison, rigid multi-layer PCBs also require the same number of washing cycles, but its FR4 support is stronger, and the probability of problems easily presented is also smaller.
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