Nextreme Inc., a maker of micro-scale thermal and power management products in Research Triangle, NC, has developed a novel way to cool chips while banking energy. The company runs the cooling process in reverse, converting the heat into power circuitry that trickle-charges batteries. The process arises from an esoteric — yet basically simple — change in the way chips are packaged.
Nextreme's innovation creates a thermally active copper pillar bump. When electrical current is passed through the bump one side cools rapidly relative to the other and the bump actually generates power. While the principles behind the process have been known for a long time, they've only been possible thanks to recent advances in nanotechnology.
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Engineers at the University of San Diego’s Jacobs School of Engineering have designed biobatteries on commercial tattoo paper, with an anode and cathode screen-printed on and modified to harvest energy from lactate in a person’s sweat.
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