Sumitomo Electric Industries, Limited

Shuji Yazu

Hideo Itozaki

Tetsuji Jodai

Saburo Tanaka

Nobuhiko Fujita

Keizo Harada

Akio Hara

Naoji Fujimori

Kenjiro Higaki

Susumu Yamamoto

Nozomu Kawabe

Teruyuki Murai

Tetsuo Nakai

Tomoyuki Awazu

Kenichiro Sibata

Kazuo Tsuji

Nobuyuki Sasaki

Takeshi Yamaguchi

Hitoshi Sumiya

Hidenori Nakanishi

Tadakazu Kobayashi

Masaya Miyake

Shuichi Satoh

Takahiro Imai

Tsutomu Nakamura

Takashi Matsuura

Noriyuki Yoshida

Kazuo Sawada

Satoshi Takano

Nobuhiro Ota

Noriki Hayashi

Kenji Miyazaki

Kazuwo Tsuji

Hitoshi Oyama

Hisao Hattori

Takeru Nakashima

Kouichi Iwata

Akito Yoshida

Junji Degawa

Hiroyuki Fujikawa

Shuichi Sato

Yosio Nisida

Yuzo Demizu

Masuo Nakagawa

Kiyofumi Muro

Moritami Okada

Nozumu Kawabe

Sigeki Isojima

Kazuhiko Hayasi

Yuichiro Kono

Akira Hara

Process for manufacturing a superconducting composite

A tunnel junction type Josephson device includes a pair of superconductor layers formed of a compound oxide superconductor material and an insulator layer formed between the pair of superconductor layers. The insulator layer is formed of a compound oxide which is composed of the same constituent elements as those of the compound oxide superconductor material of the superconductor layers but with an atomic ratio which does not present a superconductivity characteristics. In addition, the superconductor layers and the insulator layer are continuously formed while supplying oxygen.

Tunnel junction type josephson device

A high-temperature superconducting thin film of compound oxide selected from the group consisting of:

Superconducting thin film and a method for preparing the same

A process for manufacturing a superconducting elongated article such as a superconducting wire which is applicable for manufacturing a superconducting coil or the like. The process includes steps comprising filling a metal pipe with material powder of ceramic consisting of compound oxide having superconductivity, performing plastic deformation of the metal pipe filled with the ceramic metal powder to reduce the cross section of the metal pipe, and then subjecting the deformed metal pipe to heat-treatment to sinter the ceramic material powder filled in the metal pipe. The ceramic material powder may contain compound oxide having Perovskite-type crystal structure exhibiting superconductivity. The metal pipe may selected from a group comprising metals of Ag, Au, Pt, Pd, Rh, Ir, Ru, Os, Cu, Al, Fe, Ni, Cr, Ti, Mo, W and Ta and alloys including these metals as the base. The heat-treatment may be carried out at a temperature ranging from 700 to 1,000.degree. C., The plastic deformation of the metal pipe filled with the ceramic metal powder may be performed in such manner that the cross section of the metal pipe is reduced at a dimensional reduction ratio ranging from 16% to 92% by wire-drawing or forging by means of dies, roller dies, or extruder.

Process for manufacturing a superconducting wire of compound oxide-type

A semiconductor substrate comprising a single crystal substrate base such a silicon and a superconducting thin film layer deposited on said substrate base and composed of compound oxide such as Ln.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-.delta.. (Ln is lanthanide).

Semiconductor substrate having a superconducting thin film

A substrate having a superconducting thin film of compound oxide thereon. An intermediate layer consists of at least one layer of copper-containing oxide is interposed between the substrate and the superconducting thin film.

Substrate having a superconductor layer

There is disclosed a device for forming a thin film on a substrate by irradiating a target of a compound oxide superconducting material with a laser beam and evaporating on the substrate a thin film corresponding to a composition of the target in an oxygen ambient atmosphere by laser evaporation, a scanning optical system for causing the laser beam to scan being disposed in an optical path of the laser beam.

Device for forming a compound oxide superconducting thin film

A continuous method for manufacturing an elongated superconducting campsite composed of a superconductor consisting of compound oxided and a metal sheath surrounding the superconductor, including the steps of kneading a material powder of superconducting compound oxide with a binder, continuously shaping the resulting kneaded paste into an elongated pre-form by an extruder or by coating technlque, heating the pre-form continuously to remove said binder, wrapping the pre-form with a metallic sheet, and then subjecting the pre-form from wrapped with the metallic sheet to sintering operation to sinter said material powder.

Superconducting composite comprising a matrix made of superconducting sintered mass composed of perovskite type or quasi-perovskite type oxide and metal phase dispersed in the superconducting mass with a proportion of from 10 to 70 volume % with respect to said composite. The metal phase may consist of at least one of Cu, Ag, Au, Pt, Ni and Zn or their alloys. The superconducting sintered mass may be Ba-Y-Cu-O type compound oxide.

Superconducting composite

Device for forming a compound oxide superconductor thin film

An outer surface of a superconducting thin film of compound oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-.delta. deposited on a substrate such as MgO and SrTiO.sub.3 is protected with a protective layer which is composed of amorphous inorganic material such as inorganic glass, amorphous oxide.

A process for producing a composite oxide superconducting wire is disclosed, which comprises the steps of compacting material powder for an oxide superconductor in a noble metal pipe; heating the metal pipe filled with the material powder at a temperature ranging between an upper limit corresponding to the lowest melting point of any one of constituent components in the material powder and a lower limit which is lower by 100.degree. C. than said upper limit to sinter the material powder and cooling the product at a cooling velocity of less than 50.degree. C./min, and further including a series of wire-drawing, annealing and sintering steps. Furthermore, an intermediate layer of noble metal can be interposed between the oxide superconductor and the metal pipe.

Process for manufacturing a composite oxide superconducting wire

A method for forming an oxide superconductor thin film having different thickness portions, in a process for manufacturing a superconductor device, includes the step of forming an oxide superconductor thin film having a uniform thickness on a substrates. A portion of the oxide superconductor thin film is etch-removed so that the oxide superconductor thin film has a thin thickness portion. Preferably, before the etching, the oxide superconductor thin film is coated with a metal layer, and the oxide superconductor thin film and the metal layer are etched together by means of a physical dry etching process.

Method for forming continuous oxide superconducting layer having

A semiconductor substrate having a silicon substrate and a superconducting thin film layer composed of compound oxide such as Ln.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-.delta. (Ln is lanthanide) and stratified on the silicon substrate, characterized in that an intermediate semiconductor layer composed of compound semiconductor material such as GaAs is interposed between the silicon substrate and the superconducting thin film layer.

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Hyogo, Japan

Shuji Yazu