FPC Bending Radius Calculator
Fold an FPC too tight and the copper cracks months later in the field. Get the minimum safe bending radius before your mechanical engineer finalizes the enclosure.
Results are engineering estimates for early sizing — always confirm against the module datasheet before design freeze.
Static multipliers follow common IPC-2223 practice: 6× (1 layer), 10× (2 layers), 15× (multilayer); dynamic folding needs ≈ 10× the static minimum. For production folding jigs and bend-life testing we can build and qualify the fold for you — ask via the contact link.
FAQ
What bend radius is safe for a 2-layer FPC?
Following common IPC-2223 practice, a 2-layer FPC needs about 10 times its thickness for a static bend and roughly 10 times that for repeated dynamic flexing. Always verify with the manufacturer rating.
Why does copper crack months after install?
A bend below the minimum radius creates micro-cracks that propagate under thermal cycling and vibration, causing intermittent failures long after the product ships. Redesign the fold or add a stiffener.
When should I use the FPC bend-radius calculator?
Use it before your mechanical engineer finalizes the enclosure: enter the FPC thickness, layer count and bend type to get the minimum safe radius and a copper-fracture risk verdict.
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