Improved 1 V and 10 V Josephson voltage standard arrays

Author

Kohlmann, J. ; Muller, F. ; Gutmann, P. ; Popel, R. ; Grimm, L. ; Dunschede, F.-W. ; Meier, W. ; Niemeyer, J.

Author_Institution

Phys. Tech. Bundesanstalt, Braunschweig, Germany

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

3411

Lastpage

3414

Abstract

1 V and 10 V Josephson voltage standard arrays are fabricated on the basis of an improved design, using a modified technology. The Nb/Al/sub 2/O/sub 3//Nb trilayer is deposited directly on the Si wafer. The edges of the base electrodes are insulated by an anodization process. The maximum step voltage increases linearly with the external microwave voltage. Switching between different voltage levels is possible by simple switching of the dc voltage bias. A laboratory-made, oversized circular waveguide reduces the attenuation of the experimental set-up.

Keywords

alumina; anodisation; measurement standards; millimetre wave measurement; niobium; superconducting microwave devices; superconductor-insulator-superconductor devices; voltage measurement; 1 V; 10 V; 70 to 94 GHz; Josephson voltage standard arrays; Nb-Al/sub 2/O/sub 3/-Nb; Nb/Al/sub 2/O/sub 3//Nb trilayer; Si; Si wafer; anodization process; attenuation reduction; base electrode edges; dc voltage bias switching; direct deposition; external microwave voltage; maximum step voltage; oversized circular waveguide; voltage level switching; Electrodes; Fabrication; Frequency; Insulation; Josephson junctions; Microwave oscillators; Niobium; Reproducibility of results; Stripline; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.622112

Filename

622112