Flexible Printed Circuits
Single- to multi-layer FPCs on polyimide and polyester film, with precise tolerances, gold contacts and stiffeners where you need them. Whether it's the tail inside a membrane switch or a dynamic flex link in a wearable, we design and produce flex circuits that route reliably for the life of your product.
A flexible printed circuit (FPC) is a conductor pattern printed or etched onto a thin, bendable film instead of a rigid board. It carries signals between components while folding into the space a rigid board could never fit.
Copper traces are etched (or silver ink printed) onto polyimide or polyester, then covered by an insulating coverlay with openings where contacts need to be exposed. Stiffeners and adhesive layers are added where the circuit needs support or mounting.
Single, double-sided or multilayer stacks up to 8 layers with blind/buried vias.
Polyimide for dynamic flex and heat; PET for cost-sensitive static applications.
Copper or silver shield layers with grounding for noise-sensitive circuits.
ZIF/FFC tails, gold fingers, board-to-board or custom connectors.
FR4, PI or stainless stiffeners where the flex needs rigidity and support.
Gold (ENIG), silver, OSP or carbon — matched to your contact requirements.
| Parameter | Typical Value |
|---|---|
| Layers | 1–8 |
| Base film | Polyimide (PI) 12.5–50 µm; PET 25–125 µm |
| Copper weight | 0.5–2 oz |
| Min line width / space | 0.1 mm / 0.1 mm |
| Min drill hole | 0.2 mm |
| Bend radius (dynamic) | ≥ 10× material thickness |
| Surface finish | ENIG gold, silver, OSP, carbon |
| Operating temperature | −40 °C to +105 °C (PI), −40 °C to +85 °C (PET) |
| Insulation resistance | ≥ 100 MΩ @ 100 VDC |
| Dielectric withstand | 250 VAC, 60 s |
| Compliance | RoHS, REACH, UL 94V-0 |
Printed or copper circuit tails and layers
Bands, earbuds and body-worn sensors
Ultrasound probes, monitors and implantable-adjacent wiring
Folding flex between lens modules and boards
Steering columns, door modules and sensors
Compact sensors, trackers and smart home nodes
Latest from the Blog
View all articles"Membrane switches and mechanical keypads both survive millions of actuations, but they suit very different products. Compare cost, sealing, backlighting and reliability to pick the right interface."
Read article"Polyester (PET) and polycarbonate (PC) are the two dominant graphic overlay materials. Learn how chemical resistance, printing, flexibility and cost decide which one your membrane switch needs."
Read article"Before you approve a membrane switch drawing, you need to check these seven specifications — from actuation force to tail routing. A 10-minute review now prevents expensive tooling changes later."
Read articleSend your Gerbers or a sketch — we'll review stack-up, tolerances and cost, and reply within one business day.