ECpE Faculty Seminar

Jiming Song

Seminar: Efficient Electromagnetic Approaches for Developing Effective Medium Model for Semiconductor Substrates

Speaker: Associate Professor Jiming Song

Date: October 17, 2011

Time: 1:10 to 2 p.m.

Location: 3043 ECpE Building Addition

Abstract: Current CMOS and RFCMOS processes require substrate backend dummification. Modeling such structures using existing full wave electromagnetic simulation is very memory-intensive and almost impossible even at small die sizes. We develop a faster and memory-efficient electromagnetic full wave simulation tool to model a silicon backend and a multilayer organic package substrate with an effective medium model. This effective model provides the key building block to study die/package interaction, components to components interaction as well as die to die interaction in multichip modules.

First, I will give an overview of the research in computational electromagnetics in my group. Then I will present two efficient approaches to model metal lines/patches in multilayered media as an effective medium. The integral equation approach is developed to analyze the wave propagation in periodic structures. The approach is capable of handling scattering from the array filled with different media in different layers. Combining the equivalence principle algorithm and connection scheme (EPACS), it can be avoided to find and evaluate the multilayered periodic Green’s functions. The spectral domain approach is applied to analyze shielded microstrip over lossy layered media and the equivalent model is developed to replace the layered media with a single layer. Several approaches have been developed to accelerate the summation of infinite series in the evaluation of the matrix elements.

Speaker bio: Associate Professor Jiming Song received his PhD degree in electrical engineering from Michigan State University in 1993. From 1993 to 2000, he worked as a postdoctoral research associate, a research scientist, and visiting assistant professor at the University of Illinois at Urbana-Champaign. From 1996 to 2000, he worked as a research scientist at SAIC-DEMACO. Dr. Song was the principal author of the Fast Illinois Solver Code (FISC).  He was a principal staff engineer/scientist at the Semiconductor Products Sector of Motorola in Tempe, Arizona before he joined the Department of Electrical and Computer Engineering at Iowa State University as an assistant professor in 2002.

His research has dealt with modeling and simulations of interconnects on lossy silicon and RF components, the wave scattering using fast algorithms, the wave propagation in metamaterials, and transient electromagnetic field. Song received the NSF Career Award in 2006, and he is a senior member of IEEE.