Surface Inductance of Superconductive Striplines

Inductance in superconductive circuits plays a significant role in rapid single flux quantum (RSFQ) systems. Inductance estimation is a challenging issue. The microwave behavior of these inductances is characterized by the surface inductance of a line. A methodology to accurately estimate the surfac...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2022-06, Vol.69 (6), p.2952-2956
Main Authors: Jabbari, Tahereh, Friedman, Eby G.
Format: Article
Language:English
Subjects:
automated layout and routing
electronic design automation
Inductance
Integrated circuits
Magnetic tunneling
Process parameters
Single flux quantum
Stripline
Striplines
Superconducting magnets
superconductive integrated circuits
Superconductivity
Superconductors
Surface impedance
Surface treatment
Thickness
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Summary:Inductance in superconductive circuits plays a significant role in rapid single flux quantum (RSFQ) systems. Inductance estimation is a challenging issue. The microwave behavior of these inductances is characterized by the surface inductance of a line. A methodology to accurately estimate the surface inductance of a stripline is the focus of this brief. A closed-form expression describing the dependence of the surface inductance of a stripline on the line thickness, magnetic field, and current density is provided. The effects of process parameter variations on the surface inductance are also discussed. An expression to model the effects of the trapezoidal geometry of a stripline is presented. The dependence of the surface inductance on the oxide and metal layer thicknesses is also presented. The objective is to provide an accurate estimate of the surface inductance for use in automated routing of VLSI complexity RSFQ circuits.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2022.3156533