| 摘要 |
PURPOSE:To improve the superconductivity characteristic by providing a coating layer of the component element of an oxide superconducting material around a wire rod provided with copper or copper alloy on the surface layer and heat- treating it in the oxidizing atmosphere. CONSTITUTION:A thin film 2 containing the IIIa group element and subsequently a thin film 3 containing the alkaline earth metal element are overlapped on a copper wire 1 by spattering or the like. These films are heat-treated in the atmosphere containing the O2 gas and reacted to each other to form a superconductor layer 4, and a lengthy superconducting wire 5 is obtained. The binding between a wire rod and the superconductor of this conductor wire is firm, and the quality is stable.
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