Walter H., Dermitzaki E., Wunderle B., Michel B.
Fraunhofer IZM, DE
Keywords: hygroscopic swelling, moisture polymers, small dimension, visco elastic
This paper presents various modified measurement methods for analysis the effect of moisture of thermo-mechanical properties of MEMS relevant polymer systems. It was developed an advanced measurement method, modified DMA multifrequency and hygroscopic swell analysis, for the determination of moisture dependent parameters for micro and nano scale samples. The authors found empirical constants to describe the experimental data by means of WLF equation. The water molecules seem to weaken the intermolecular forces for the polymers to prefer the state of entropy elasticity already to lower temperature, and the moisture shows influences on the visco elastic properties significantly.Diffusion in highly filled epoxies does not follow the conventional Fickian diffusion of polymers. Modified non-Fickian absorption models were used.In combination with numerical methods new strategies for life time evaluation and fatigue of microelectronic packaging, MEMS and NEMS can be addressed.
Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2010: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Published: June 21, 2010
Pages: 178 - 181
Industry sector: Sensors, MEMS, Electronics
Topic: Modeling & Simulation of Microsystems
ISBN: 978-1-4398-3402-2