INSULATING FILMS THERMALLY CONDUCTIVE

1. Dielectric Films with Phase Change Coating
Coating of electrically insulating films such as Kapton®MT or other engineering plastics having an enhanced thermal conductivity with phase change compounds softening from certain temperatures on, leads to minimizing thermal contact resistances, thus the total thermal resistances will be reduced. During warm-up, phase change coatings start filling up surface-specific roughnesses and/or unevenesses and expel any air enclosures from micro structures. The wettening of the contact areas is furtheron improved by volumetric material expansion at increasing temperature. Convex and concave surface structures stack up tolerances can widely be compensated by the use of these materials. Thixotropic nature prevents run-out. The thicknesses are characterized by high process reliability what among others makes these films ideal for replacing thermal greases. All carrier films are characterized by a high mechanic tensile as well as tear strength.

Properties and advantages in brief:

  • Extremely low thermal resistances less than 0.15°C-inch²/W through
  • entire thermal contact
  • Silicone-free
  • No dry up, pump out, migration
  • No run-out through thixotropic properties
  • Contact coating effective at room temperature
  • Process reliable coating thicknesses
  • Ideal to replace messy thermal grease


Available as:

  • Sheet or roll
  • Kiss cut parts on roll
  • Die cut parts
  • Other phase change thicknesses on request
  • With or without tackiness


Some application examples:

Thermal link of:

  • LED's
  • MOSFETs and IGBTs to heat sinks
  • Diodes and A.C. converters to heat sinks
  • Discrete controllers to housings
  • Displays to heat sinks


For use in:

  • Automotive motor control units
  • Power supplies
  • Power inverters
  • Telecom appliances



2. Thermally Conductive Dielectric PSA Tapes

Adhesive tapes, having increased thermal conductivities are based on pressure sensitive high bonding dielectric acrylate or silicone adhesives either as free-standing films or made as dielectric engineering plastics which are coated with a high bonding PSA on both sides. Through the thermally conductive adhesive the thermal contact is highly improved, thus minimizing the total resistance, even at low pressures. Materials with different expansion coefficients can easily be bonded, thus giving a reliable thermal link.

Convex and concave surface structures stack up tolerances can widely be compensated by the use of these materials.

The therrmally conductive adhesive films work well for realizing an easy effective and cost-efficient thermal link of non-dielectric electronic packages to heat sinks. Above all they are used in applications having little space only and where their permitted weight is very limited. Using screws, springs, clips as mechanic fasteners, thus becomes superfluous.

Properties and advantages in brief:

  • Silicone-free acrylate or silicone based
  • Very low thermal resistances of less than 0.3 °C-inch²/W through excellent thermal contacts
  • Dielectric
  • Reliable strong adherence on uneven or hardly machineable surfaces
  • No need of mechanic fasteners e.g. screws, springs, clips
  • Very good pre-assembly
  • No migration - compared to thermal greases
  • Neither mixing of components nor curing processes
  • Solvent-free and resistant
  • No impurities
  • Reliably constant thicknesss


Available as:

  • Sheet or roll
  • Kiss cut parts on roll
  • Die cut parts on roll
  • Bulk die cut parts


Some application examples:


Thermal link of:

  • LED's
  • Heat sinks to CPUs
  • Temperature sensors to the point of measurement
  • Through-hole vias to cooling plates


For use in:

  • LED lights and LED arrays
  • Automotive engine management systems
  • PCs
  • Telecom appliances



3. Dielectric thermally conductive adhesive with glass bleads

The dielectric thermally conductive adhesive system is based on a two-part modified acrylate formulation filled with 125 µm.