PhD Name: Yan ZILIN

Date and place of defence: October 17, 2013 - Université de Grenoble, France.

BME-MLCCs (Base Metal Electrode-Multilayered Ceramic Capacitors) are one of the most produced ceramic products in the microelectronics. To obtain high volume to capacitance ratio, thinner layers are required (< 1µm thick). However, thinner layers result in significant instabilities during the sintering of these components which are fabricated by powder processing.

The main objective of the project is to understand the link between the microstructure at the length scale of powder particles and the formation of such discontinuities. This is an essential key for improving the performance and reliability of BME-MLCCs. Discrete element simulations, which work at the particle length scale, will be used to establish this link. Such simulations, which involve several hundreds of thousands of particles, are developed at Grenoble-INP, using clusters of computers. They will be critically validated in comparison to real multilayered specimens processed and characterized in Darmstadt. Raw materials and MLCCs will be provided by our industrial partner Samsung Electro-mechanics.

In addition, microtomographic observation at the European Synchrotron Research Facility (ESRF) will be used to follow the in-situ development of discontinuities. This interdisciplinary project will bring results of interest to the broader community of researchers who are interested in the sintering of ceramics for energy applications (SOFC applications, LTCCs…)

Discrete element simulation of the development of an instability during sintering.

Project Partners

INPG - SIMAP (Grenoble)

TUD - Ceramics Group, Materials Dept

Samsung Electro-mechanics, LCR Division