Two schemes for the efficient calculation of spreading resistance correction factors are presented. The study reveals that the integration factor in the Schumann-Gardner's multilayer theory is well approximated by a power law within suitably defined spans. Further, appropriate partitioning of space grid...
the contribution of the spreading resistance to the overall device temperature rise may be insignificant and usually falls within the design margin. However, in an attempt to remove more heat from today’s high performance devices, a larger heat sink is often used and, consequently...
The range of applicability of the mixed-boundary-value method for calculating spreading resistance for a homogeneous slab with an effective contact-radius source and backed by a substrate of arbitrary but finite resistivity is investigated. Solutions are presented in terms of the correction factor and...
As shown in Fig.1, we consider the spreading resistance for the current passing through the circular domain on an anisotropic conductor. With this setting, the spreading resistance has been investigated experimentally10,11. We first give a brief derivation of the spreading resistance for an anisotro...
An accurate calculation of spreading resistance Author: Michael Denhoff, Category: article MW Denhoff - 《Journal of Physics D Applied Physics》 被引量: 44发表: 2006年 Deducing Ink Spreading Curves from Reflection Spectra Acquired Within Printed Color Images accurate spectral predictions, but requires...
A comparison of the results for the total thermal resistance, Rtot, versus plate size using the spreading formulas of Lee et al. and the exact solution are shown in Figure 3. As may be seen in the figure, there is no discernable difference between the two sets of results. Based upon ...
(1), the spreading resistance (Rspreading) scales linearly with sample resistivity (ρsample), where “a” is the electrical contact radius. However, as the contact radius is hard to determine experimentally, the direct calculation of resistivity (hence the carrier concentration) is impossible. ...
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The benchmark calculation for Case 1 uses rectangular device spreading theory from Ellison to obtain the dimensionless source center and source-averaged spreading resistancesψSp= 0.59 andψAve-Sp= 0.50, respectively [5]. Theory shows that the maximum total thermal resistance from the source center ...
Increasing the die dimensions beyond the current spreading distance does not decrease the series resistance and does not improve LED brightness. We propose a current transfer length as a characteristic parameter quantifying current spreading. We have shown that the transfer length in the current ...