Abstract.
Embarked Quad Flat Non-lead (QFN) electronic devices are equipped with a significant number of sensors used for flight parameters measurement purposes. Their accuracy directly depends on the package thermal state. Flight safety therefore depends on the reliability of these QFNs, whose junction temperature must remain as low as possible while operating. The QFN64 is favored for these applications. In the operating power range considered here (0.01-0.1W), the study shows that radiative heat transfer is negligible with respect to natural convective exchanges. It is then essential to quantify the convective heat transfer coefficient on its different areas so that the arrangement is properly dimensioned. This is the objective of this work. The device is welded on a PCB which may be inclined with respect to the horizontal plane by an angle ranging from \(0^{\circ}\) to \(90^{\circ}\). Numerical approach results are confirmed by thermal and electrical measurements carried out on prototypes for all power-inclination angle combinations. The correlations here proposed help determine the natural convective heat transfer coefficient in any area of the assembly. This work allowed to thermally characterize and certify a new QFN64 package equipped with sensors designed for aeronautics, currently under industrialization process.
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References
A. Sohail, A. Samiulhaq, D. Vieru, Eur. Phys. J. Plus 129, 28 (2014)
M.M. Rashidi, H. Shahmohamadi, Commun. Nonlinear Sci. Numer. Simul. 14, 2999 (2009)
M. Guedda, M. Sriti, D. Achemlal, Eur. Phys. J. Plus 129, 170 (2014)
H.F. Öztop, K. Al-Salem, Y. Varol, I. Pop, M. Firat, Int. J. Numer. Methods Heat Fluid Flow 22, 1053 (2012)
E. Abu-Nada, Int. Commun. Heat Mass Transf. 69, 84 (2015)
T. Basak, R.S. Kaluri, A.R. Balakrishnan, Numer. Heat Transf. A 62, 336 (2012)
A. Bairi, J.M. García de María, Int. J. Heat Mass Transfer 66, 355 (2013)
M. Darzi, M. Vatani M., S.E. Ghasemi, D.D. Ganji, Eur. Phys. J. Plus 130, 100 (2015)
Y. Varol, H.F. Oztop, A. Varol, Int. Commun. Heat Mass Transf. 34, 19 (2007)
M. Sheikholeslami, M. Gorji-Bandpy, D.D. Ganji, Eur. Phys. J. Plus 130, 225 (2015)
M.A. Sheremet, I. Pop, Eur. Phys. J. Plus 130, 107 (2015)
A. Bairi, Appl. Therm. Eng. 28, 1267 (2008)
R. Kandasamy, S. Subramanyam, Int. J. Numer. Methods Heat Fluid Flow 15, 61 (2005)
A. Bairi, Int. Commun. Heat Mass Transf. 72, 94 (2016)
Integrated Circuits Thermal Test Method Environmental Conditions-Natural Convection, Jedec Solid State Tech. Association, JESD51-2A (2008)
QFN (Quad Flat Pack No-Lead), Freescale Semiconductor Application Note, Document Number: AN4530 Rev 0, 5/2012
Atmel 8826A-SEEPROM-PCB, Mounting Guidelines Surface Mount Packages
A. Bairi, Microelectron. Reliabil. 74, 67 (2017)
S.V. Patankar, Numerical Heat Transfer and Fluid Flow, edited by W.J. Minkowycz, E. Sparrows (Taylor and Francis Publishers, 1980)
H.K. Versteeg, W. Malalasekera, An Introduction to Computational Fluid Dynamics: The Finite Volume Method (Pearson Education Limited, 1995)
A. Bairi, Microelectron. Reliabil. 66, 85 (2016)
www.hotdiskinstruments.com/products/instruments-for-thermal-conductivity-measurements/tps-2500-s.html, Hot Disk TPS 2500S
M. Gustavsson, H. Nagai, T. Okutani, Solid State Phenom. 124-126, 1641 (2007)
Q.C. Wang, Z.C. Wu, X.P. Zhu, Int. J. Numer. Methods Heat Fluid Flow 25, 25 (2015)
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Baïri, A. Quantification of free convection for embarked QFN64 electronic package: An experimental and numerical survey. Eur. Phys. J. Plus 132, 343 (2017). https://doi.org/10.1140/epjp/i2017-11615-5
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DOI: https://doi.org/10.1140/epjp/i2017-11615-5