The effect of thermal constriction on heat management in a microelectronic application.

Journal article


Ekpu, Mathias, Bhatti, Raj, Okereke, Michael I., Mallik, Sabuj and Otiaba, Kenny 2013. The effect of thermal constriction on heat management in a microelectronic application. Microelectronics Journal. https://doi.org/10.1016/j.mejo.2013.10.011
AuthorsEkpu, Mathias, Bhatti, Raj, Okereke, Michael I., Mallik, Sabuj and Otiaba, Kenny
Abstract

Thermal contact constriction between a chip and a heat sink assembly of a microelectronic application is investigated in order to access the thermal performance. The finite element model (FEM) of the electronic device developed using ANSYS software was analysed while the micro-contact and micro-gap thermal resistances were numerically analysed by the use of MATLAB. In addition, the effects of four major factors (contact pressure, micro-hardness, root-mean-squared (RMS) surface roughness, and mean absolute surface slope) on thermal contact resistance were investigated. Two lead-free solders (SAC305 and SAC405) were used as thermal interface materials in this study to bridge the interface created between a chip and a heat sink. The results from this research showed that an increase in three of the factors reduces thermal contact resistance while the reverse is the case for RMS surface roughness. In addition, the use of SAC305 and SAC405 resulted in a temperature drop across the microelectronic device. These results might aid engineers to produce products with less RMS surface roughness thereby improving thermal efficiency of the microelectronic application.

KeywordsThermal constriction; Micro-contact; Heat sink
Year2013
JournalMicroelectronics Journal
PublisherElsevier
ISSN00262692
Digital Object Identifier (DOI)https://doi.org/10.1016/j.mejo.2013.10.011
Web address (URL)http://hdl.handle.net/10545/622572
hdl:10545/622572
Publication dates14 Nov 2013
Publication process dates
Deposited07 Apr 2018, 11:59
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Archived with thanks to Microelectronics Journal

ContributorsUniversity of Greenwich
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