Apparatus for accurate measurement of interface resistance of high performance thermal interface materials

Gwinn, J.; Saini, Manohar Singh; Webb, Ralph L.

doi:10.1109/itherm.2002.1012515

Cited by 19 publications

(15 citation statements)

References 5 publications

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“…This helps to minimize the uncertainty of the two driving quantities that affect the accuracy of the overall results, namely the temperature measurements and the locations of these measurements. As in previous investigations [3,4], numerical simulations demonstrated the influence of the intruding thermistors had negligible impact on the temperature profile through the meter bars, the associated heat fluxes and the temperature distributions at the contact surface.…”

Section: Meter Bars and Thermometrysupporting

confidence: 69%

“…This configuration relies on highlyconductive and well-characterized meter bars to both extrapolate the temperature at the surfaces and measure the heat flow through the sample. A number of studies have made use of this general design [3][4][5][6][7] Gwinn et al [4] developed an apparatus for testing TIMs capable of measuring thermal impedances as low as 6.5 × 10-6 m2•K/W with an uncertainty of 10%. The copper meter bars were 38.1 mm square in cross-section and 45 mm long, instrumented with three 1.59 mm RTDs, with the closest RTD located 2 mm from the surface.…”

Section: Introductionmentioning

confidence: 99%

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Development of a high-accuracy thermal interface material tester

Kempers

Kolodner²,

Lyons³

et al. 2008

2008 11th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems

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An experimental apparatus has been designed and constructed to accurately measure the next generation of high-performance thermal interface materials with unprecedented precision and accuracy.The apparatus is based on a common implementation of ASTM D5470 using meter bars. However, the apparatus in the present study is unique in that it utilizes small thermistors to make precise thermal measurements (±0.003 K). These measurements are used to calculate the thermal impedance at the interface of two conducting bodies while keeping input power at a minimum. Furthermore, a robust and conservative uncertainty analysis is employed to calculate how the measured uncertainties contribute to the calculated quantities of thermal impedance and effective thermal conductivity.Baseline tests are performed to demonstrate the sensitivity and uncertainty of the apparatus by measuring the contact resistance of the meter bars in contact with each other as a representative low-thermal-impedance case. A contact thermal impedance as low as 2.81E-5 m 2 ·K/W was measured with a calculated absolute uncertainty of approximately 2%. The effective thermal conductivity of a gap pad was also measured to further validate the apparatus.

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Section: Meter Bars and Thermometrysupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Development of a high-accuracy thermal interface material tester

Kempers

Kolodner²,

Lyons³

et al. 2008

2008 11th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems

View full text Add to dashboard Cite

show abstract

“…As an example, it has been reported [64] that for a Pentium 2 processor, the TIM accounted for 15% of the total allowable thermal resistance and if the same TIM had been used for a Pentium 4, with 6.1% increase in heat flux, then the TIM would have used 80% of the thermal budget. And, as it is clear increase in power dissipation is a trend that is set to continue and as such there is going to be a need for thermal interface materials with higher performance, lowest thermal resistance and long term reliability.…”

Section: Discussionmentioning

confidence: 99%

Thermal Interface Materials - A Review of the State of the Art

Sarvar

Whalley

Conway

2006

2006 1st Electronic Systemintegration Technology Conference

192

100

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“…The uncertainty in measuring thermal resistance is inversely related to the resistance value [28]. A lower resistance value results in a higher uncertainty.…”

Section: Uncertainty Analysismentioning

confidence: 99%