Low Temperature Fabrication of Superconducting Thin Films
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15
Thin films of superconducting materials, such as Y1Ba2Cu3Ox and the like, can be fabricated using polymer binders, either neat or as a mixture dissolved in appropriate solvents. The oxide superconductor needs to be finely pulverized to give a fine, nearly colloidal dispersion in the dispensing solution. This dispersion is applied by spin coating, brushing, silk screening, offset printing or spraying. Loadings of the dispersion to 30%-40% wt of the superconductor are possible and higher loadings are possible depending on the application technique employed. Curing of the film can be in air, oven baking or thermal or radiation curing. The binder can be removed, if desired, by air oxidation, volatilization or depolymerization to give more conductive films.