By way of an apology for the more verbose blogs I’ve been issuing recently I’d like to present you with a blog that serves no other purpose than to show a pretty picture. CFD as an acronym has quite a few different interpretations. Contracts for Difference if you’re into your financials. Colour For Directors if you’re in marketing. Cheats, Frauds and … [Read more...]
Measured Thermal Resistance of Microbumps in 3D Chip Stacks
Evan Colgan, Jamil Wakil, IBM Introduction As it becomes increasingly difficult to scale devices down to improve performance, alternate approaches such as 3D chip stacks are being developed, which improve system performance by increasing the interconnect density and reducing the interconnect length(1). The stacking of multiple chips with through silicon vias (TSV) and fine … [Read more...]
Measuring and Predicting Junction Temperature: Thermal Factors Influencing Reliability in GaN HEMTs
Jason Carter, Jeremy Acord, Dan Hoffmann, Andrew Trageser, Charles Pagel Penn State University – Electro-Optics Center, Freeport, Pa.NSWC, Crane Division, Crane, Ind. 1. Introduction As a nascent technology compared to GaAs, Si, or nonsolid state technology, GaN-on-SiC transistors have not established a history of reliability from which end-users of the technology can … [Read more...]
Thermal Facts & Fairy Tales: Are Critical Heat Fluxes of LEDs and ICs Comparable?
Author Clemens J.M. Lasance, Guest Editor Fact: many papers discussing LED thermal management issues report values of about 100 W/cm2 and use the same arguments that are valid for ICs to demonstrate that some critical value has been reached. The question to be addressed: is this indeed a fact, or can it be shown to be a fairy tale, and hence do we need different … [Read more...]
Understanding the Thermoreflectance Coefficient for High Resolution Thermal Imaging of Microelectronic Devices
Authors Kazuaki Yazawa, Microsanj/Purdue University Dustin Kendig, Microsanj Peter E. Raad, TMX Scientific/SMU Pavel L. Komarov, SMU Ali Shakouri, Purdue University Introduction Thermoreflectance thermal imaging is an optical technique for measuring, with external illumination, the relative change in the surface reflectivity as a function of temperature for a … [Read more...]
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