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Heat Spreader Solutions: Embedded Heat Pipes

Aavid Thermacore’s embedded heat pipe heat sink solutions produce excellent spreading of heat along the length of heat pipes embedded within a heat sink.

embedded heat pipe heat sinkIncorporating two-phase heat transfer principles means more efficient cooling. Our heat pipes remove “hot spots” from the heat sink base, sending the heat across the heat sink base and maximizing airside fin efficiency. Major OEMs and government contractors count on the performance of Thermacore products. Rugged, reliable heat spreaders from Aavid Thermacore are at work protecting critical electronic components on the new Zumwalt class (DDG-1000) Navy destroyers.

 

cold-plate-newDesigners also get high-heat flux heat dissipation capability (>300 W/cm2), thanks to Aavid Thermacore’s sintered powder wick structures. And our embedded heat pipes can offer a thermal performance improvement of up to 20% compared with typical aluminum or copper base spreaders — particularly in applications like electronics or computers, where the heat source is small relative to the area for fins. Thermal architects have more flexibility, too, because our embedded heat pipes don’t require changing the geometry of the heat sink.

 

embedded-heat-sinkAavid Thermacore heat pipes can be mounted to the base in several ways, including direct soldering into grooves on the heat sink base with the heat pipes in direct contact with heat source, or embedded into holes using our own proprietary expansion process that gives you an extra-efficient metal to metal thermal interface. Because of our pliable sintered powder metal wick structure, Aavid Thermacore’s heat pipes are effectively bent, shaped, flattened and configured to fit into the tightest of applications. For example, is there a mounting hole in the way? No problem, the heat pipe can be bent to go around it. To make the best thermal contact, the heat pipes are soldered or adhesively bonded into the metallic heat sinks. With over 40 years of experience, Aavid Thermacore’s procedures for making these solder or adhesive bonds and the material used have been proven over and over again to withstand and survive the toughest temperature extremes and vibration environments.

For cost-sensitive applications, Aavid Thermacore offers a thermally conductive adhesive film that ensures even coverage of the epoxy joint throughout the interface. Heat pipes can also be integrated into the “hot face” of the heat sink for direct contact to the heat pipe wall.

Brief Technical Data
Size
Custom; application-specific
Options Various shapes (square, L-shaped, rectangular, pedestal-mounted, etc.)
Embedded Heat Pipe Options Expanded, soldered, thermal epoxy
Heat Pipe Material High-purity copper
Working Fluid Water
Wick Sintered copper powder (grooved or screen)
Maximum Heat Flux   >300 W/cm2

 

Thermal management challenge? Take the first step towards the solution for you. Please contact an Aavid Thermacore technical representative or e-mail info.thermacore@aavid.com for more information on our thermal solution technologies.

 
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