Relevant publications:
Modeling Spiral Inductors in SOS Processes
Kuhn, W.B.; Xin He; Mojarradi M.
Electron Devices, IEEE Transactions on, Volume: 51, Issue: 5, May 2004
Spiral Inductor Performance in Deep-Submicron Bulk-CMOS with Copper
Interconnects
Kuhn, W.B.; Orsborn, A.W.; Peterson, M.C.; Kythakyapuzha, S.R.;
Hussein, A.I.; Jun Zhang; Jianming Li; Shumaker, E.A.; Nair, N.C.
Radio Frequency Integrated Circuits (RFIC) Symposium, 2002 IEEE , 2-4 June 2002
An Approach for the Calculation of Magnetic Field
within Square Spiral Inductors at Low Frequency
N. M. Ibrahim, and W. B. Kuhn
International Journal of Numerical Modelling:
Electronic Networks, Devices, and Fields, 15:339-354, 2002.
Analysis of Current Crowding Effects in Multiturn Spiral Inductors
Kuhn, W.B.; Ibrahim, N. M.
Microwave Theory and Techniques, IEEE Transactions on, Volume: 49, Issue: 1,
Jan. 2001
Analytical Modeling of Current Crowding Effects in
Multi-turn Spiral Inductors
Kuhn, W.B.; Ibrahim, N.M.
IEEE Transactions on Microwave Theory and Techniques, pp. 31-38, Jan. 2001
Inductors
A large part of the research that has been carried out by the
KSU Communications Research Lab has been focused on inductors. Not
inductors in general, but rather the performance and applications of
spiral inductors fabricated in RFICs. Publications related to
spiral inductors can be found
here.
One such
publication was centered around the effects of current crowding in
multi-turn spiral inductors within an IC. Current crowding, among
other things, is
responisble for an inductor's increasing effective resistance with
increasing signal frequency. During the course of this project,
data was taken to visually simulate how current "crowds" around these
turns of metal. Below are two animations showing current traveling
through the fabricated inductor, for two inductors composed of metals of
different thicknesses. In both animations, the currents appear
white in color.
And for an inductor fabricated with a thicker metal:
