Stretchable flexible printed circuits offer elasticity; replace polyimide used in existing FPCs with elastic substrate.

Can be stretched repeatedly and are heat-resistant, allowing components to be solder-mounted. Circuit conductor incorporates same copper wiring as existing FPCs, but wiring method is designed to allow it to work with stretchable substrate. Use of copper wiring minimizes variations in conductor resistance due to FPC expansion or contraction, allowing use of FPC as a sensor. Potential applications include use as a wearable sensor to help diagnose disease in the chest; stretchable FPC is wrapped around chest to measure signal fluctuations in copper wiring. Can be used as elastic wiring material in wearable devices.

OKI Stretchflex

OKI Electric Cable

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