Patent ID: 6156707
Filing Date: 2000-12-05
Classification: C23C,H01L

Abstract:
A method for manufacturing a substrate for a superconducting microwave component, the substrate being composed of an underlying dielectric substrate and a pair of oxide superconductor thin films formed on a pair of opposite planar surfaces of said underlying dielectric substrate, respectively, the method including the steps of:forming a first Tl--Ba--Ca--Cu--O compound oxide thin film on a first planar surface of said underlying dielectric substrate,forming a second Tl--Ba--Ca--Cu--O compound oxide thin film on a second planar surface of said underlying dielectric substrate, andannealing said underlying dielectric substrate coated with said first and second Tl--Ba--Ca--Cu--O compound oxide thin films in an oxygen atmosphere that contains not less than 5 mol % of thallium at a temperature in the range of 850.degree. C. to 900.degree. C. inclusive for a time in the range of one to three hours inclusive, to produce substantially uniform superconductive characteristics in said first and second Tl--Ba--Ca--Cu--O compound oxide thin films.