"We have a headache with Arrhenius" was attributed to Takehisa Okada, Senior General Manager of Sony Corporation, when asked about Sony's perspective on reliability prediction methods during a U.S. Japanese Technology Evaluation Center visit.[1] The thermal environment is an important consideration in the design of electronics. Temperatures that arise during the use of … [Read more...]
CFD: One measly letter away from CAD
"The stuff you engineers design is too good," the guy from Marketing said, "I need shoddier! Can you make them less efficient and cheaper?" I was working for a small company that made electric power conditioning equipment. Our devices protected against spikes, sags and brownouts in the AC power for mission-critical equipment like air traffic control radar and the computer … [Read more...]
High accuracy thermal interface resistance measurement using a transient method
Heat dissipation of active devices has become one of the limiting factors in further miniaturization. While component manufacturers succeed in decreasing the overall thermal resistance of their packages, the thermal interface resistance to the board becomes the next limiting factor. Therefore, understanding interface and contact resistances becomes increasingly important for … [Read more...]
Low temperature electronic cooling
The potential for low temperature enhancement of CMOS performance has been recognized for some time, going back as far as the late 1960's and mid-1970's. A collection of articles focusing on low temperature electronics is included in the book by Kirschman(1) where a number of researchers [2-6] have identified the advantages of operating electronics at low temperatures. Jaeger … [Read more...]
Multilayer circuitry on metal substrates
Today's electronics are becoming smaller and faster, resulting in increased power densities and greater risk of thermal problems. Thermal dissipation requirements thus need to be satisfied by the use of several cooling mechanisms. The cooling systems may include conduction, convection and radiation cooling. Conduction can be the most efficient mode of heat transfer and about … [Read more...]
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