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Greetings, fellow traveler! This page is part of a larger project, with the ultimate goal of creating a Josephson Junction Voltage Standard at OV. Information on this kind of standard can be found on the Josephson Junction Voltage Standard- Project page.
OV has for a long time been renown for it's skilled, somewhat eccentric members, and has a long standing tradition of interesting projects.
A silicon CMOS process is while on one hand far more useful, a lot more complex and harder to achieve good enough tolerances for that a useful chip can realistically be designed. A bipolar transistor is in many ways easier to manufacture, but good doping gradients require high temperature thermal cycling if any kind of diffusion is to be preformed. Also, there is a vast ocean of regular semiconductor devices that can be readily ordered online, they just aren't that fun.
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Superconducting tunneling junctions are an especially interesting deviceespecially interesting devices as they under correct biasing can act like perfect Frequency-to-Voltage converters, a property which is today used as worldwide to realize a non-physical primary standard for the Volt.
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Most basic superconducting circuits can be made with little more than a
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- All materials in question are easily deposited with an electron beam
- Substrate movement only required for
Even though
Lithography: Nah, PL needs photoresist, etching and exposure. Use Laser cut stainless steel pcb stencils from china instead! Physical masking is wayHop
at OV can not only do basic deposition, but microcircuit fabrication and superconductor experimentation. I (HT) do not know of any simpler process we might use to accomplish this, the costs involved are minimal and virtually no additional equipment is required.
It will however be potato-quality and cause nanolab engineers to roll of their chairs laughing.
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