PURPOSE: To decrease the high frequency resistance by providing an intermediate silver layer on a ceramic substrate and forming a thick film layer of oxide superconductor thereon.
CONSTITUTION: Calcined powder of Bi2Sr2CaCu2Ox phase is admixed with a binder, a plasticizer and a dispersant and the mixture is molded by doctor blade method to produce a thick film of 50μm which is then cut into a ring having an opening and a silver foil of 50mm thick is also cut into a ring having one opening. The silver foil 22 is bonded using a silver paste to a square board 23 of sintered magnesia and the oxide superconductor 21 molded by doctor blade method is superposed thereon. It is heated to 890°C at a rate of 300°C/h and then cooled gradually down to 870°C at a rate of 10°C/h and further cooled down to the room temperature at a rate of 600°C/h. Consequently, an oriented texture is formed on the surface of the oxide layer to produce a component being employed in high frequency communication or in the high frequency probe for magnetic resonance imaging(MRI) scanner.