Dr. Richard Bonner, Anqi (Angie) Fan, Daniel Pounds and Dr. Ehsan Yakhshi-Tafti; Advanced Cooling Technologies, Inc. INTRODUCTION In light-emitting diodes (LEDs), 70 percent to 80 percent of the applied electrical power is converted to waste heat. If this thermal energy is not properly dissipated, the resulting high operating temperatures lead to reduced brightness, shift … [Read more...]
Thin Film Thermal Conductivity Measurement using a Micropipette Thermocouple
R. Shrestha, K. M. Lee and T. Y. Choi - University of North Texas D. S. Kim - POSTECH INTRODUCTION Due to the required experimental characterization complexity for the thermal conductivity measurement of thin films, accurate measurement of such materials has been difficult to achieve for thicknesses less than 1 µm. For example, conventional Fourier heater plate … [Read more...]
Calculating the Heat Dissipation Rate for a Vapor Condenser Heat Sink
This article presents an analysis methodology that can be used to calculate the thermal resistance of a vertical downward facing vapor condenser plate-fin heat sink, i.e. a heat sink in which the plate-fins extend downward from a horizontal base into a coolant vapor region and whose function it is to condense this vapor into liquid condensate. Such heat sinks are used in … [Read more...]
New Low Resistance TIM Delivers 6.0 W/m°K Thermal Conductivity
Thermal interface material provider Fujipoly has released Sarcon GR45A-00, a very low modulus thermal interface material with a low thermal resistance. Featuring a thermal conductivity of 6.0 W/m°K per ASTM D2326 (4.5 W/m°K per ISO/CD 22007-2 Hot disk) and a thermal resistance as low as 1.33°C cm2/W, the new formulation completely fills air gaps between components, board … [Read more...]
Multi-Purpose Cold Plates for TEC, LED and Semiconductor Cooling
Custom liquid cooling solutions provider Koolance has released three new multi-purpose cold plates for heat sources ranging from 25-50 mm/sq. The three models— PLT-UN50F, PLT-UN40F and PLT-UN25F—are ideal for thermal applications such as thermoelectric cooling, LEDs, image sensors and semiconductor cooling. PLT-UN50F features a cooling area footprint of 50mm x 50mm (1.97in x … [Read more...]
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