Flexible PCB (FPC) Sourcing From China
3 resources tagged with "Fpc"
FPC (flexible printed circuit) is the polyimide flex board that lets wearables, cameras, and compact electronics route signals around tight bends — and it is a frequent sourcing pain point because flex stack-ups are less forgiving than rigid FR4. Chinese FPC makers handle single, double, and multilayer polyimide builds with ZIF-compatible contacts; for wearables it sits alongside battery certification (UN 38.3, IEC 62133-2) and FCC/CE/UKCA work. A real-world smartwatch program we reference shipped 3,000 units at a 0.6% defect rate, where FPC bend reliability was a key inspection point.
When you source an FPC, the dynamic vs static bend rating and the stiffener placement decide whether it survives assembly and flexing in the field, so share the actual bend radius and cycle count with the supplier. A common pitfall is ordering a flex that passes electrical test flat but cracks at the bend zone once folded into the enclosure.
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FAQ
What is the MOQ for a custom FPC from China?
Prototype runs start at tens of pieces; production MOQ is often a few hundred to a thousand depending on panel utilization. Setup and tooling charges dominate at low volume, so unit price drops sharply above 1,000 pieces.
What goes wrong most often with FPCs?
Cracking at the bend region, delamination of the polyimide layers, and ZIF contact misalignment. Specify the bend radius and whether the flex is static or dynamic, and inspect samples after folding into the real enclosure.
How is FPC different from rigid PCB for sourcing?
Flex stack-ups need stiffeners, controlled bend zones, and tighter material control, so fewer factories do it well. Quote and qualify FPC separately from your rigid boards rather than assuming a rigid-PCB shop handles flex equally.
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