Silicon dominates the electronics industry as the semiconductor of choice for most applications, but some electrical functions require electronic properties different from those of silicon. A grouping of semiconductors termed "III-V" have desirable electrical properties for applications such as microwave integrated circuits, light emitting diodes and laser diodes. Some of the … [Read more...]
Integrated Circuit Package Types And Thermal Characteristics
Introduction Integrated circuits range in power consumption from mW (or maybe microwatts) to hundreds of Watts with the number of electrical connections to the next level packaging ranging from eight to over 1,000. With such a broad range of interesting packaging to consider, it is no wonder that any simple generalizations will always find exceptions. This review article will … [Read more...]
Indirect Thermosyphons For Cooling Electronic Devices
Nomenclature Variables R Thermal Resistance [°C/W] or [°C-mm2/W] Q Power [W] Q" Heat Flux [W/cm2] T Temperature [°C] or [K] h Heat Transfer Coefficient [W/cm2-K] Subscripts sat saturation tc thermocouple s sink or boiler w wall j junction layer of die a ambient f fluid or saturation c chip surface boil associated with … [Read more...]
A Simple Thermal Resistance Model – Isoflux Versus Isothermal
In most cases today thermal design for electronic products is performed with the aid of sophisticated computational fluid dynamics and heat transfer codes. Nonetheless, there may still be occasions when a thermal designer needs a quick estimate of the external thermal resistance of a package or heat sink that does not warrant the use of powerful computer codes. In such cases an … [Read more...]
GCS Theory Applied to Thermal Interface Materials
There are 819 kinds of Thermal Interface Material (TIM) - those greases, putties, pads and phase change compounds that go between hot electronic components and their heat sinks - and just as many ways to misuse them. This article covers all of them by stating: If a TIM disappoints, it is all your fault for making one or more of these silly mistakes. Never Learning How to Make a … [Read more...]
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