András Poppe, Ph.D.; Mentor Graphics MAD MicReD Unit The electrical, thermal and optical parameters determining light emitting didoes (LEDs) operation are in a strong, mutual dependence; without knowledge about the parameters in one of these domains the other characteristics cannot be measured correctly. The reliability, useful operating life time and luminous flux are … [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...]
Electronics Cooling September 2013 Issue Now Online
Don’t miss out on the September 2013 issue of Electronics Cooling, which includes feature articles on Heat Pipe Integration Strategies for LED Applications; Testing of power LEDs: The latest thermal testing standards from JEDEC, as well as a calculation corner and technical briefs. If you would like to receive your free copy of Electronics Cooling click here to subscribe. Read … [Read more...]
Why Not Just Shove a Heatsink on Top of it? Part 3: Pads, Vias and Undersinking
An appreciation of heat flow paths is a pre-requisite for good thermal design. If you attempt to augment heat flow where there is none then your expectations are as futile as your design skills. The real value of simulation for me is that it enables an insight into the behaviour of a proposed design (this is true for simulation of any design and any behaviour). Once you … [Read more...]
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