Test strategy for thermo‐mechanical ageing effects in polymeric materials

van Dijk, Marius; Schneider‐Ramelow, Martin

FG Transdisziplinäre Nachhaltigkeitsforschung in der Elektronik

The use of polymeric materials in (micro-) electronic applications is growing steadily since many years. They provide a multitude of functions, such as protection against environmental conditions (temperature, humidity, dust, etc.), mechanical stability and electrical isolation. However, during the lifetime of these electronic components, polymers can change their properties significantly, which can lead to premature failure. Therefore, it is of great importance to understand the behavior of these materials throughout its expected lifetime, considering the assumed use-profile, e.g. temperature, humidity, UV light, shocks/vibrations, etc. By means of numerical methods such as finite element simulations, the physical behavior of electronic components can be predicted. However, ageing effects are scarcely considered, and often materials are characterized only in their initial state. Appropriate material models, taking into account ageing effects over the lifetime are desired but not yet common or incompletely present in the literature. This paper describes an approach on how to test the ageing behavior of polymeric materials in order to develop such material models for numerical simulations.