Artificial crystals for cooling electronics. Free Technical Library News

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Artificial crystals for cooling electronics

09.07.2018

Semiconductor devices generate heat during operation, which becomes a problem in improving the performance of microcircuits. Researchers at the University of Illinois at Urbana-Champaign and the University of Texas at Dallas have found a new way to improve heat dissipation.

The result of their study was a practical confirmation of the existence of materials with ultrahigh thermal conductivity.

The dissipation of heat by a silicon crystal is inefficient. The thermal conductivity of diamond is about 15 times greater, but its widespread use is difficult because the cost of natural diamonds is high, and artificial diamonds contain structural defects that reduce thermal conductivity.

The project participants relied on boron arsenide crystals, a material not found in nature. Using vacuum deposition, the scientists tried to form a structure with a low defect density and high thermal conductivity. By experimenting with process parameters and materials, the researchers were able to obtain a material with three times the thermal conductivity of the best materials currently used in heat spreaders.

The result of the next stage of research should be a process suitable for a wide application of the development.

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