Hybrid heatsinks combine the thermal conductivity of copper with the advantages of aluminium


Copper and cold sprayed hybrid-heat sinks have almost identical thermal results and outperformed the aluminum heat sink in a substantial fashion, thus showing the importance of quick heat spreading along the base. At the same time, the hybrid-heat sink weighed less than the copper heat sink.
Indeed, hybrid-heat sinks manufactured by cold spraying have higher production cost than commercially available aluminum heat sinks; however, adding a layer of copper on an aluminum heat sink decreases its thermal resistance by 48%. This has a direct effect on the production costs since the semiconductor area can be decreased by 94%. Besides, the deposition efficiency and deposition rates of copper powder by the cold spray process are 95% (including overspray) and 10 kg/h, respectively, indicating the potential of the CS-process to realize a cost-effective large-scale industrial production.

 

For detailled technical information, you can download the press release about cold sprayed hybrid heatsinks here.

    Cold sprayed hybrid heat sinks have excellent mechanical and physical properties
  • Electrical conductivity IACS up to 98%
  • Deposition efficiency > 98 %
  • Porosity < 0.5 %
  • Feed rate 10 kg/h
  • Hardness – 107 HV
  • Ultimate tensile strength – 285 MPa
  • Thermal conductivity 368 W/mK
  • Gas tightness < 1 × 10-7 mbar-l/s
  • Elongation 25%
  • Minimum layer thickness < 50 µm
  • Maximum layer thickness - no limit
Different kinds of cold sprayed ihybrid heatsinks

Different types of cold sprayed hybrid heatsinks

Setup of cold spraying hybrid heatsinks with copper

Setup of cold spraying hybrid heatsinks

Applications

From the frying pan to space technology - the spectrum of possible applications is huge.

References

Renowned companies from all over the world have trusted the Impact Spray systems for years.
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