Microfabrication is quite an art. Being able to image pieces of copper down to such ludicrously small sizes with techniques like EUV and optical proximity corre

Microfabrication is quite an art. Being able to image pieces of copper down to such ludicrously small sizes with techniques like EUV and optical proximity correction is already quite advanced. Doing it for high temperature superconductors like YBCO is definitely not trivial. I don't think superconductors are a good idea due to the reduced fidelity, you might as well just use normal conductors and spread them out for better cooling