Fujitsu Corporation

Nagisa Ohsako

Kyung-ho Park

Naoki Awaji

Seigen Ri

Kohta Yoshikawa

A high temperature oxide superconductor is efficiently protected from the affects of water and acids by forming a passivation layer of a fluoride. The fluoride layer comprises a fluoride composed of one or more elements composing the oxide superconductor and/or one or more elements that can compose an oxide superconductor by replacing at least in part one or more elements composing the oxide superconductor.

Protection of oxide superconductor

Disclosed is a process for the preparation of an electroconductive polymeric material, comprising the steps of forming fine grooves in a substrate, embedding a polymerization reaction catalyst in the fine grooves, and bringing a monomer capable of forming an electroconductive polymeric material into contact with the catalyst embedded in the fine grooves to selectively form fine wiring of the electroconductive polymeric material in the grooves. According to this process, a polymeric material oriented in the longitudinal direction of the fine grooves can be prepared, and therefore, a polymeric material having an excellent electroconductivity can be provided.

Process for preparation of electroconductive polymeric material provided

A method for fabricating a superconductive film composed of a RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.x compound, or a (Bi.Sr.Ca.Cu.O) compound. In a first embodiment, oxides or carbonates of the component materials, namely Y.sub.2 O.sub.3, BaCO.sub.3, and CuO are mixed in atomic ratios of 1:2:3, according to the chemical formula of RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.x, and sintered to create a rhombic perovskite structure. The sintered mixture is powdered again, with added powdered amounts of Y.sub.2 O.sub.3 and powdered metallic Cu, and sintered. The sintered product is used as the source for an electron beam evaporator. In a second embodiment the (Bi.Sr.Ca.Cu.O) compound is formed into a sintered pellet which is composed of a mixture of one part of BiO, 3-15 parts of SrCO.sub.3, 4-30 parts of CaCO.sub.3, and 2-5 parts of CuO, in atomic ratios of Bi, Sr, Ca and Cu.

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Yokohama, Japan

Nagisa Ohsako