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US 5,288,697 AGranted
Production of thin protective polyimide layers on high temperature superconductors
AssigneeBASF SE
InventorsWolfgang Schrepp, Hans-Joachim Haehnle, Michael Grunze
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Abstract
Thin protective polyimide layers are produced on ceramic or high temperature superconductors by applying polyimide solutions, polyamic acids or starting substances therefor to the superconductor surface and imidating or drying in an oxygen atmosphere.
Claims5
A process for producing a protective layer of a polyimide on a substrate of a high temperature superconductor material which comprises:
- (1) applying a layer of a) a polyamic acid which serves as a precursor to polyimide or b) a precursor of the polyamic acid to the substrate and (2) imidating the applied layer in an atmosphere consisting essentially of oxygen.
A processing for producing a protective layer of a polyimide on a substrate of a high temperature superconductor material which comprises:
- applying a solution of the polyimide to the substrate and drying the solution at an elevated temperature in an atmosphere consisting essentially of oxygen.
Dependencies are inferred from the claim text.