Flexible Heaters

Flexible heaters are typically single layer flexible circuits that utilize copper or resistive alloys, such as Inconel and Cupro-nickel, to form conductive paths. As electrical current is driven through the higher resistance conductors, heat is generated. Conductor width and thickness are selected to provide the desired resistance value based on the supply voltage. Dielectric materials are selected based on operating temp and heater power density.

Flexible Circuit Technologies, a premier global supplier in design and production of
Flexible Circuits, Rigid Flex, Flexible Heaters, Flat Flex Cables, Membrane Switches, Plastic Moldings, Assemblies, Product Module Builds to Complete Product Box Builds

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Flexible heaters offer very good heat transfer to the heat sink in a very low profile and low mass package. Because they are flexible, they can also conform to, and heat, irregular surfaces that other types of heaters cannot. TCR (Temperature Coefficient of Resistance) of custom heater alloys provide minimum resistance change when temperature changes.


  • Medical diagnostic equipment
  • Disk drive heaters
  • Electronic equipment
  • Automotive

Flexible Heater Capabilities

  • Multiple foil alloys and thicknesses to choose from to provide a large range of custom resistance values.
  • Custom heater element layout services to provide heater resistance that will provide the desired power output based on voltage input.
  • Assembly capabilities to add thermistors, connectors, lead wires, potting, etc.
  • A wide variety of pressure sensitive adhesive backings to choose from
  • Custom mounting of heaters to heat sinks with either pressure sensitive or thermosetting adhesives
  • Fabrication of customer specified heat sinks

Flexible Heater Materials

Heater element – Inconel 600, Cupronickel 715, Constantan, Copper

Insulation – Polyimide film/epoxy adhesive, polyimide film/acrylic adhesive

Heat spreading material – Aluminum, Copper

Pressure sensitive adhesives – 3M 467, 3M 468, 3M 6035, 3M 9077, 3M 9460, 3M 9469, TESA 8853, TESA 8854

Advanced Features
Heater Flex advance features including:

Selectively copper plated conductors to eliminate heating in leads and other areas (cupronickel/Constantan)

Profiled heater zones to provide non-uniform heating when desired

Flexible Heater

Aluminum or copper heat spreader layers to help transfer heat to heatsink.

Assembly of thermistors, lead wires, and connector.  

Epoxy potting or assembled components and wires.

Pressure Sensitive Adhesive (PSA) with release liner applied to heatsink side of heater for easy “peel and stick” application.

In summary, if you have flexible circuit design or flexible printed circuit board needs, we can help.

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