The Datacenter Quandary Two significant challenges facing datacenter operators today are increased power and cooling costs [1]. In a recent survey of datacenter operators, 38% of respondents said they considered both power and cooling as equally important; another 21% indicated that cooling was their major challenge; and 12% cited power consumption as a big concern [2]. Another … [Read more...]
Thermal Strain in Semiconductor Packages, Part II
Introduction This Calculation Corner continues Part I, published in the previous issue [1]. Part I described the construction of a typical flip-chip package configuration for high-power chips, consisting of a laminate assembly of materials adhesively bonded together and having different Coefficients of Thermal Expansion (CTE). The process of bonding these different materials … [Read more...]
Thermal Effusivity
The Technical Data column of the previous issue discussed the concept of thermal diffusivity. It makes sense to discuss in this issue a related topic: thermal effusivity. While thermal diffusivity, a, is defined as the ratio between the thermal conductivity, k, and the volumetric thermal capacity, ρcp, the effusivity, e, is related to their product, as follows: It is … [Read more...]
Reliability Testing Of Thermal Greases
Introduction Thermal Interface Materials (TIMs) play a key role in the thermal management of electronic systems by providing a path of low thermal resistance between the heat generating devices and the heat spreader/sink. Typical TIM solutions include adhesives, greases, gels, phase change materials, pads, and solder alloys. Most TIMs consist of a polymer matrix, such as an … [Read more...]
Providing More Value Than Playing Video Games
ElectronicsCooling magazine was founded more than 12 years ago with a mission of providing current and practical thermal management information with archival value. I hope you agree this magazine is still delivering on its original promise. The last word in the mission statement is value, and each of us, as a thermal engineer, desires to add value to our projects. Admittedly, … [Read more...]
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