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

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

Ekpu, Mathias, Bhatti, Raj, Okereke, M.I., Mallik, Sabuj and Otiaba, Kenny (2014) The effect of thermal constriction on heat management in a microelectronic application. Microelectronics Journal, 45 (2). 159 - 166. ISSN 0026-2692 (doi:10.1016/j.mejo.2013.10.011)

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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.

Item Type: Article
Uncontrolled Keywords: thermal constriction, micro-contact, micro-gap, chip, heat sink
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty / Department / Research Group: Faculty of Engineering & Science
Related URLs:
Last Modified: 30 Jan 2017 15:11
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/11142

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