High wiring density – supports complex electronic designs in compact spaces
Lightweight & thin – reduces overall product size and weight
Excellent bendability – ideal for dynamic or space‑constrained applications
Improved heat dissipation – prolongs the lifespan of electronic devices compared to traditional rigid PCBs
Unlike standard PCBs, FPCs can bend and flex, making them the preferred choice for industries such as consumer electronics, automotive, medical devices, and industrial equipment.
Keyflex Advantage
End‑to‑end FPC services: tooling, design, and part supply
Material expertise: polyimide and polyester films for high‑performance circuits
Custom solutions: tailored to client specifications and industry standards
Enhanced reliability: engineered for long‑term operation in demanding environments
Types of Flexible Circuits
Rigid‑Flex Circuits – combine rigid and flexible layers interconnected by plated through holes, offering strength with flexibility.
Flat Flexible Circuits (FFC) – consist of a single conductive layer laminated between insulating films, ideal for lightweight, low‑profile applications.
Design & Manufacturing Capabilities
Our FPCs are engineered to be lightweight, thin, and durable, making them suitable for applications requiring frequent movement, such as hinged lids or dynamic assemblies.
Copper bonded to polyimide ensures long‑term flexing without degradation.
Component integration: LEDs, switches, and IDC connectors can be soldered with locally applied stiffeners.
Custom shapes and sizes: circuits can include multiple flexible tails, eliminating ribbon cables between PCBs.
Advanced processes: copper chemically etched for intricate track‑work, with finishing options such as gold plating for enhanced conductivity and durability.
Advantages of Flexible Circuit Design
Eliminates messy, time‑consuming wire harnesses
Reduces space and weight while enabling robust connections and fast assembly
Performs reliably in high‑vibration environments by reducing stress on solder joints
Polyimide covering protects circuits in harsh operating conditions
Excellent for high‑speed signal transmission with controlled impedance and reduced crosstalk
Uniform conductor spacing ensures signal integrity and reliability
Common Questions About Flexible Circuit Design
What is the minimum bend radius for FPCs?
A general rule of thumb:
Single‑layer FPCs: minimum bend radius = 6 × circuit thickness
Double‑layer FPCs: minimum bend radius = 12 × circuit thickness
Multilayer FPCs: minimum bend radius = 24 × circuit thickness
(Typical single‑layer thickness: 0.15 mm)
Why Choose Keyflex for Flexible Printed Circuits
Decades of expertise in FPC design, tooling, and manufacturing
Material excellence with polyimide and polyester substrates
Custom solutions tailored to client specifications and industry standards
Proven reliability in electronics, automotive, medical, and industrial applications
