Multiparameter Teststand (MPT)

Multiparameter Teststand (MPT)
Power Cycling

Thermal resistance Rthwith cyclical temperature loads

In the real product, a change in temperature is caused by a change in gap. This thermally induced movement creates tensile or compressive forces that act on the TIM in the gap. In addition to the forces described, other effects often occur with thermally induced movements: On the one hand, shear forces develop due to the so-called CTE mismatch. This describes the discrepancy between the different temperature-related expansions of TIM and the carrier material on which the TIM was applied. On the other hand, higher temperatures in TIM lead to an increased oxidation reaction.
ZFW Power Cycling offers a combined study of the mechanical effects. Temperatures of at least -40 to a maximum can be achieved
150 ° C per cycle. Further superimpositions, e.g. external humidity and heat (e.g. PV1200) are possible without any problems. Depending on the application, a defined number of cycles can be examined in order to get to the bottom of the longevity of the TIM in relation to the individual application.

As a result, it is now possible to make qualitative as well as quantitative statements about the change in thermal resistance as a function of the number of cycles. In the ZFW multi-parameter test stand, several samples / materials can be examined at the same time, so that a statistical statement of the measurement results is possible without any problems.

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