Open Access
Thermal spreading resistance in multilayered contacts : Applications in thermal contact resistance
Yuri S. Muzychka,M. R. Sridhar,M. Michael Yovanovich,V. W. Antonetti +3 more
- Vol. 13, Iss: 4, pp 489-494
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TLDR
In this paper, a solution for computing the thermalspreading resistance of planarcircular contact surfaces is presented, where a model is developed to compute the contact conductance between a bare substrate and a coated substrate.Abstract:
Application of highly conductive coatings to contacting surfaces is a commonly employed method to enhance thermal contact conductance. In many applications it is often necessary to apply an intermediate coating such that the conductive coating may be applied to a nonadhering substrate. In these instances, it is desirable to predict the effect that the intermediate and e nal coatings have on the spreading resistance. A solution for computing the thermalspreading resistanceofa planarcircularcontactona doubly coatedsubstrateispresented.Also,a modelis developed to compute the contact conductance between a bare substrate and a coated substrate. Comparisons are made with data obtained in the literature for which no analytical model was available. Solution of the governing equations and numerical computation of the spreading resistance were obtained using computer algebra systems. Nomenclature Ac; At; Aa = area, m 2 Ain; Bin = Fourier‐Bessel coefe cients a;b = two radii with a < b, m CL = spreading correction factor e = natural log base Hc = contact microhardness, MPa hc = contact conductance, W/m 2 K J0.x/read more
Citations
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Development of a thermal resistance model for chip-on-board packaging of high power LED arrays
Minseok Ha,Samuel Graham +1 more
TL;DR: A thermal analysis of high power LED packages implementing chip-on-board (COB) architecture combined with power electronic substrate focusing on heat spreading effect is conducted, bypassing the need for detailed computational simulations using FEA.
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Analytical Solution for Temperature Rise in Complex Multilayer Structures With Discrete Heat Sources
TL;DR: In this article, a closed-form analytical solution for the temperature distribution in a rectangular structure with rectangular isoflux heat sources, any number of layers of arbitrary thermal conductivity, and perfect interfacial contact or finite interfacial conductance was presented.
Journal ArticleDOI
Review of Advances in Thermal Spreading Resistance Problems
TL;DR: In this paper, the literature on thermal spreading resistance from the past 50 years is chronologically presented, and the last decade of advances are specifically described, focusing on recent advances since much of the literature was reviewed in a handbook chapter published in 2003.
Journal ArticleDOI
Heat transfer: a review of 1999 literature.
Richard J Goldstein,E. R. G. Eckert,W. E. Ibele,Suhas V. Patankar,Terrence W. Simon,Thomas H. Kuehn,Paul J Strykowski,Kumar K. Tamma,Avram Bar-Cohen,Joachim Heberlein,Jane H. Davidson,John C. Bischof,Francis A Kulacki,Uwe Kortshagen,Sean C. Garrick +14 more
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Friction, wear and material transfer of sintered polyimides sliding against various steel and diamond-like carbon coated surfaces
TL;DR: In this article, the friction of polyimide/DLN is lower than for polyimides/steel, while polyIMide shows higher wear rates after sliding against DLN compared to steel counterfaces.
References
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Handbook of Mathematical Functions
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Picosecond optical studies of amorphous diamond and diamondlike carbon: Thermal conductivity and longitudinal sound velocity
Christopher J. Morath,Humphrey J. Maris,Jerome J. Cuomo,David L. Pappas,Alfred Grill,Vishnubhai Vitthalbhai Patel,James P. Doyle,Katherine L. Saenger +7 more
TL;DR: In this paper, a picosecond pump-probe technique is used to measure the room-temperature thermal conductivity and longitudinal sound velocity of amorphous diamond (a•D) and diamondlike carbon (DLC) thin films.
Journal ArticleDOI
Thermal conductivity of dielectric thin films
John C. Lambropoulos,M. R. Jolly,C. A. Amsden,S. E. Gilman,Michael John Sinicropi,D. Diakomihalis,Stephen D. Jacobs +6 more
TL;DR: In this article, a thermal comparator has been used to measure the thermal conductivity of dielectric thin-film coatings and an analytical heat flow model has been applied to estimate the thermal resistance of the film/substrate interface.
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