polyimide heaterPolyimide (Kapton®) film is an organic material with very high dielectric capability, thin flexible profile and low thermal mass, while providing superior resistance to most solvents, acids, and radiation. Being transparent, Polyimide (Kapton®) heater allows easy visual inspection of the internal foil circuit structure. In connection with these features, Polyimide (Kapton) heaters are very ideal for applications:

    • space and weight demanding instrument heating
    • be exposed to chemicals or oil
    • in vacuum environment requiring low out-gassing
    • fast and precise heating
    • low voltage low ohm value heater film, e.g. 5V - 12V
    • high performance heating for consumer appliance

Foil Element

Polyimide (Kapton) heaters make use of very thin (e.g. 50μm) etched metal (usually nickel based alloy) foil as resistance element. The resistance pattern to be etched is designed in CAD and transferred to the foil, which is then processed through acid spray to produce the desired resistance pattern.

kapton heater sinomasTaking advantage of the etched foil technology, complicated thermal profiles and wide range of resistance can be realized. Bifilar circuit meander arrangement is possible, which is often required to eliminate the parasitic inductance in the circuit.

Technical Specification

Electrical Thermal Others
Input volatge 12V - 400V  Max Temperature 260°C (note 3) Min width 8mm (note 1)
Watt density ≤ 3.0 W/cm2 Min Temperature -50°C Max width 500mm (note 2)
Watt tolerance ≤ ±5% Aluminum foil backing optional Thickness ≤0.2mm
Insulation > 100M Insulation overlayer optional Bending radius ≥0.8mm
Dielectric > 1000V/min        
Temperature Sensor RTD / film pt100, thermistor / NTC, thermocouple, thermal fuse, thermal switch
Adhesive backing optional with acrylic, silicone, teflon, polyimide based PSA
Circuit design dual input voltage, multiple heat zone, low inductance design, etc.
Lead wires Teflon, silicone rubber, PI insulated cables, different plug set / termination available

Notes:

  1. The minimum width of ployimide / kapton heater is 8mm for one side leads exit, 5mm for two side leads exit
  2. The maxmimum width of  polyimide / kapton heater is only limited by the incoming roll of polyimide film. Henece there is no limit on one dimension. We can make wider heaters if the volume of demand is considerable.
  3. The maximum operation temperature depends on many factors. 260°C applys to Aluminum plated polyimide heaters without adhesive backing.

Aluminum / Copper Plated Polyimide Heater

plated polyimide heater

Aluminum foil backing on polyimide heaters can improve the heat distribution and allows for higher watt density. For even high operation temperature and ems supression, Aluminum or copper plating of the polyimide heaters are recommended. The maximum operationtemperature of the heater can be up to 260°C. The technology has been used successfully on polyimide heaters for medical CT scanners, particle accelerators, etc.kapton heater

Applications:

  • Medical diagnostic instruments: Heat sample trays, reagent bottles, CPAP ventilator humidifier, etc.
  • Stabilize optoelectronic components
  • Enable cold weather operation of outdoor electronics such as laptop, light box, ATM
  • Protect aircraft electronic and mechanical devices in cold weather / area
  • Semiconductor manufacturing process