Thermally conductive pad

A thermal pad is similar to thermal grease for better heat dissipation of waste electronic components. Some embodiments allow an electrically isolated mounting to a heat sink.

In the operation of electronic components, especially in power electronics, arise partly very high power losses, which can not be removed via the detached housing of the component. The components are therefore provided with heatsinks. When mounting on these heatsinks remain by unevenness always airspaces that impede heat transfer greatly. The object of the thermal pads, it is therefore also to displace the air from these spaces and thus improve the heat transfer.

Often this isolation between the heat sink and the heat dissipation serving surface of the component is required, inter alia, because these areas often result in one of the terminal potentials. The purpose Insulating used can also be counted among the thermal pads, as they are made of electrically insulating but thermally well -conducting materials. They usually require but in addition the use of thermal paste.

Depending on the requirements of different materials.

  • Insulated mounting: Silicone rubber sheets and tubes, some with glass fiber fabric insert;
  • Large silicone mats for heat conducting and the same anti-vibration mounting, for example between SMD-loaded printed circuit boards and heat sinks or body parts that serve as heat sinks;
  • Mica sheets;
  • Ceramic disks (usually aluminum oxide ceramic);
  • Plastic films (Kapton ) which are partially made ​​up with paraffin coating for filling air spaces during operation by melting or with an adhesive coating.
  • Bare Mounting: Thermoplastic pads as an alternative to thermal compound, (eg processors); they melt in operation by the heating on (English: phase change ) and therefore fit to the unevenness;
  • Coated metal foils.

Known manufacturers

  • Akasa, Taiwan: thermal compounds, thermal pads
  • Bergquist, USA: films, coated silicone tissue
  • Electrolube, UK: Thermal Grease
  • Kerafol, Germany: Thermal Grease, Thermal pads, films, encapsulants
  • Kunze films, Germany: Phase change materials, thermal interface materials, heat sinks
  • Laird, USA: acquisition of Warth, Orcus: coated films, phase change materials
  • W. L. Gore, USA
  • Wacker, Germany: thermal grease
  • ShinEtsu MicroSi, USA: thermal compounds, thermal pads
  • Hardware
Polyimide
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