热界面材料性能测试Comparison of Test Methods for High Performance TIM

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Comparison of Test Methods for High Performance Thermal Interface Materials
R.N. Jarrett, C.K. Merritt, J. P. Ross, J. Hisert
Indium Corporation of America
34 Robinson Road
Clinton, NY 13323

Abstract: This paper relates the application of two of the methods for testing the thermal interface materials to the development
and characterization of high performance materials. Particular strengths of different test methods provide a more complete
understanding of TIM performance. In combination the tools provide effective development and improvement metrics. The
limitations in resolution and repeatability are discussed.

Keywords : TIM testing, ASTM D5470, thermal test vehicle

1. Thermal Interface Testing
At the 2006 SEMI-THERM 22 Conference Lasance, et al. presented a summary of the challenges facing thermal interface material testing. These challenges include the issues of repeatability and reproducibility of any test method as well as the applicability of the tests to behavior of the TIM in service. These issues continue to rise as a wider variety of TIM materials are introduced into the market for the ever increasing heat load demands on the thermal solutions.
Thermal resistance tests include steady state methods such as prescribed in the ASTM D5470 standard  and various types of thermal test vehicles [3,4], and transient methods such as the electrical temperature measurement [5] and the laser flash test.
In this paper, we limit our discussion to experiences with variations of the steady state test method. Details of the equipment are described elsewhere. We review experiences with evaluating and developing high-performance TIM materials and the correlation of the different testing methods. These evaluations include some data from initial installed material as well as the performance resulting from exposure.
2. Steady State Testing Configurations