TY - GEN
T1 - Percolation theory applied to study the effect of shape and size of the filler particles in thermal interface materials
AU - Devpura, Amit
AU - Phelan, Patrick E.
AU - Prasher, Ravi S.
N1 - Funding Information:
P.E.P gratefully acknowledges the support of the National Science Foundation through a CAREER Award (Grant No. CTS-9696003).
Publisher Copyright:
Copyright © 2000 by ASME
PY - 2000
Y1 - 2000
N2 - An important aspect in electronic packaging is the heat dissipation. Flip-chip technology is widely being used to increase the rate of heat transfer from the chip. A method to further enhance the thermal conductivity is by the use of a thermal interface material between the device and the heat sink attached to it in the flip-chip technology. Percolation theory holds a key to understanding the behavior of thermal interface materials. Percolation, used widely in electrical engineering, is a physical phenomenon in which the highly conducting particles distributed randomly in the matrix form at least one continuous chain connecting the opposite faces of the matrix. This phenomenon was simulated using the matrix method, to study the effect of different shapes and size of the filler particles. The different shapes considered were spherical, vertical or horizontal rods, and flakes in horizontal or vertical orientation. The effect of the size of these particles was also examined. The results indicate that the composites with particles having the largest side in the direction of heat flow will always have a better conductivity than the particles oriented normal to it Also, from the results, we can choose the best filler size in the composite if we know the filler concentration we are aiming at.
AB - An important aspect in electronic packaging is the heat dissipation. Flip-chip technology is widely being used to increase the rate of heat transfer from the chip. A method to further enhance the thermal conductivity is by the use of a thermal interface material between the device and the heat sink attached to it in the flip-chip technology. Percolation theory holds a key to understanding the behavior of thermal interface materials. Percolation, used widely in electrical engineering, is a physical phenomenon in which the highly conducting particles distributed randomly in the matrix form at least one continuous chain connecting the opposite faces of the matrix. This phenomenon was simulated using the matrix method, to study the effect of different shapes and size of the filler particles. The different shapes considered were spherical, vertical or horizontal rods, and flakes in horizontal or vertical orientation. The effect of the size of these particles was also examined. The results indicate that the composites with particles having the largest side in the direction of heat flow will always have a better conductivity than the particles oriented normal to it Also, from the results, we can choose the best filler size in the composite if we know the filler concentration we are aiming at.
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U2 - 10.1115/IMECE2000-1541
DO - 10.1115/IMECE2000-1541
M3 - Conference contribution
AN - SCOPUS:84885261402
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 365
EP - 371
BT - Heat Transfer
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000
Y2 - 5 November 2000 through 10 November 2000
ER -