NDLI: Submicron tunnel junctions

Content Provider	IEEE Xplore Digital Library
Author	Jackel, L. Hu, E. Howard, R. Fetter, L. Tennant, D.
Copyright Year	1965
Abstract	We have fabricated a variety of small-area, superconducting tunnel junctions and simple superconducting interferometer circuits using novel e-beam and optical lithographic techniques. These Pb-oxide-Pb(In) tunnel junctions are made using self-aligning processes which involve multiple oblique evaporations through suspended liftoff stencils formed in two-layer resist systems. Oxide barriers are grown in situ immediately after evaporation of base electrode films. Junction areas range from 10^-9cm²(optically patterned) to about 10^-10cm²(e-beam patterned). Current densities as high as 2×10⁶A/cm²have been attained. The high current-density junctions show only small hysteresis at 4K and are completely non-hysteretic at higher temperatures. These junctions have been used to make low-hysteresis interferometers with a current gain of 3. A positive feedback scheme is described which provides sharper switching characteristics in non-latching interferometers.
Sponsorship	IEEE Magnetics Society
Starting Page	295
Ending Page	298
Page Count	4
File Size	1557080
File Format	PDF
ISSN	00189464
Volume Number	17
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting films Optical interferometry Optical films Josephson junctions Optical feedback Interferometric lithography Circuits Resists Electrodes Current density
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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