Abstract: A semiconductor device and processing technique is provided for monolithic integration of a single crystal compound element semiconductor on a ceramic substrate. A high resistivity semi-insulating buffer layer is epitaxially grown on the ceramic substrate and has an elastically transitional lattice constant matching at its lower surface the lattice constant of the ceramic substrate, and matching at its upper surface the lattice constant of the semiconductor layer.

Abstract: A ceramic superconductor comprises a substantially nonmagnetic preannealed nickel-based alloy substrate which supports a ceramic superconductor. The substrate may include aluminum to strengthen the substrate, make it less magnetic and enhance its chemical compatibility with the ceramic superconductor. The ceramic is formed on the substrate by sintering superconductor grains at temperatures above 1000.degree. C. to enhance densification of the ceramic.

Abstract: A pre-existing superconductor ceramic which is bonded to a substrate is passed through a relatively short heating zone to melt the ceramic superconductor. As the superconductor is subsequently cooled after it has passed through the heating zone, a temperature gradient is established along the superconductor which causes the melted crystals to renucleate and grow along and parallel to the temperature gradient. The resulting crystalline structure exhibits improved superconducting properties when the superconductor is placed in the presence of a magnetic field. For appropriate applications, the substrate can be formed as a wire.

Abstract: A reliable superconducting contact for superconducting thin film components, based on soft superconducting materials, and a method for making the contacts. A wire blank is squeezed to a thin plate and then this plate is cut into slabs used in the bonding. The ends of the slabs are longitudinally cut so that double or multiple parallel joints can be made. The slabs have elastic, bent central portions for absorbing stresses and stiff ends having a U-beam shape joined to the components. The U-beam shape may be formed by the soldering tool used to make the joints. The ribbon-like character, thinness and other features of the bonding slab permit a precise control of the bonding temperature, reduce the strain and bending forces caused by thermal contraction, and prevent the contact from peeling off while cooling the superconducting component to the operational temperature.

Abstract: A superconducting thick film circuit board or thick film superconductor obtained by forming a rod-like crystal superconducting composite layer comprising a superconductor made of a compound of M-Ba-Cu-O, M being Y and/or a lanthanide element, and a composite of Ag and Pt on a stabilized zirconia substrate has a high Jc value and good superconducting properties.

Abstract: A flexible superconducting wire element comprising a flexible tape of partially stabilized (.about.3 mole % yttria) yttria-stabilized zirconia (YSZ), a buffer layer of fully stabilized (between 8 and 18 mole % yttria, preferably 9 mole %) YSZ deposited on the flexible tape, and a high-temperature, perovskite superconductor such as YBaCuO deposited on the buffer layer. The tape provides the strength while remaining flexible. The buffer layer is flexible because of its thinness (.about.100 nm), but provides a good crystallographic template for the growth of oriented perovskite superconductors. Thereby, the superconducting properties of the wire element approach those of a superconducting film deposited on a rigid substrate.

Abstract: A superconducting wire comprises a flexible base material having average surface roughness of not more than 0.05 .mu.m and an oxide superconducting layer formed on the base material.A superconducting wire comprises a flexible base material of yttria stabilized zirconia containing less than 0.1 percent by weight of an Al impurity and an oxide superconducting layer formed on the base material.

Abstract: The superconducting device according to the present invention is provided with a superconducting thin film of the Tl-Ba-Ca-Cu oxide deposited on a substrate thereof. Consequently, the device can be produced at a low cost because no rare earth elements are required.The superconducting thin film according to the present invention is formed by sputtering on substrate from a Tl-Ba-Ca-Cu oxide target by means of the sputtering method, followed by annealing in an oxidizing atmosphere. In this way, according to the present invention, it is possible to produce a superconducting thin film of the Tl-Ba-Ca-Cu oxide in a simple way by using an ordinary sputtering apparatus.

Abstract: In a method of patterning superconducting thin films such as YBaCuO, based on the inhibition of superconductivity by intermixing an impurity, such as silicon, with superconductor material, a thin film of silicon is formed on a magnesium oxide substrate and then patterned, by laser direct-writing for example, to correspond to a desired pattern of superconducting lines. Multilayered YBaCuO thin films are then deposited over the patterned silicon film and annealed using rapid thermal annealing at a temperature of 980.degree. C. maintained for a period in the range from 30 to 90 seconds. The rapid annealing results in intermixing of silicon and YBaCuO in regions of the film between the lines of the pattern which, in turn, causes these regions to become insulating, and at the same time causes the YBaCuO film over the line pattern to become superconducting.

Abstract: A superconducting thin film of Bi-containing compound oxide deposited on a substrate, a buffer layer made of Bi.sub.2 O.sub.3 being interposed between the superconducting thin film and the substrate.

Abstract: A thin film superconductor assembly is disclosed along with a method of fabricating same. The assembly comprises a self-supporting substrate defining at least a portion of a containment for a flow of cryogenic fluid, a dielectric layer adherent to a surface of the substrate, a thin film superconductor adherent to the dielectric layer and a moisture and oxygen impervious electrically insulating coating covering the thin film superconductor. A method of forming such thin film superconductor assembly, wherein the dielectric layer consists essentially of aluminum nitride, comprises growing the aluminum nitride dielectric layer integrally on the surface of the substrate.

Abstract: A HTSC layered structure comprising a substrate such as sapphire, a strontium titanate buffer layer and a HTSC film such as YBa.sub.2 Cu.sub.3 O.sub.7 provides a superconductor having lower surface resistance and a narrower transition temperature.

Abstract: A read only memory device comprises a first electrode, and a second electrode arranged overlapping with the first electrode so as to be geometrically in connection at the intersection. At least one of the first and second electrodes is formed of a ceramics system high temperature superconductor. A prescribed electrode out of said electrodes which is formed of the high temperature superconductor has a high resistance region for insulating the first and second electrodes from each other at the intersection corresponding to a prescribed stored data.In the manufacturing method, the first and second electrodes are formed and, thereafter, a high resistance region is formed by irradiating focused ion beam.

Abstract: A HTSC layered structure comprising a substrate such as calcium titanate and a HTSC film such as YBa.sub.2 Cu.sub.3 O.sub.7. Use of a thin buffer layer of calcium titanate on sapphire provides a YBa.sub.2 Cu.sub.3 O.sub.7-x film with higher critical current.

Abstract: The superconducting material YBa.sub.2 Cu.sub.3 O.sub.7, which loses its superconducting qualities when exposed to water, is passivated against such water damage by a thin film on its surface comprised of a mixed phase which includes YBa.sub.2 Cu.sub.3 O.sub.(7-x) F.sub.2x, where 0<X.ltoreq.1/2.

Abstract: A cubic perovskite crystal structure is disclosed satisfying the unit cell formula:R.sub.0.33+z A.sub.0.67 C.sub.1-y O.sub.3-xwhereR, A and C represent rare earth, alkaline earth and copper atoms, respectively, capable of forming a superconductive R.sub.1 A.sub.2 C.sub.3 orthorhombic perovskite crystal structure;x is 0.67 to 1.0;y is up to 0.2; andz is up to 0.1.The crystal structure can be used to form superconductive superlattices and weak links for Josephson junction devices. The crystal structure can be produced by laser ablation deposition at a temperature below that required for the formation of a superconductive R.sub.1 A.sub.2 C.sub.3 orthorhombic perovskite crystal structure. The crystal structure can be used as a substrate for the subsequent deposition of an R.sub.1 A.sub.2 C.sub.3 orthorhombic perovskite crystal structure.

Abstract: A superconducting fiber bundle includes carrier material formed by fibers of carbon, silicon carbide, steel, boron or glass. The fibers have a superconducting coating formed of a superconducting, non-metallic, inorganic material. The coating of the fibers is carried out from the liquid phase or the gas phase.

Abstract: Superconducting device include a type having a structure of a superconductor--a normal-conductor (or a semiconductor)--a superconductor, and a type having a superconducting weak-link portion between superconductors.The superconductors constituting the superconducting device are made of an oxide of either of perovskite type and K.sub.2 NiF.sub.4 type crystalline structures, containing at least one element selected from the group consisting of Ba, Sr, Ca, Mg, and Ra; at least one element selected from the group consisting of La, Y, Ce, Sc, Sm, Eu, Er, Gd, Ho, Yb, Nd, Pr, Lu, and Tb; Cu; and O. In addition, the c-axis of the crystal of the superconductor is substantially perpendicular to the direction of current flowing through this superconductor.

Abstract: A super conducting material is disclosed which exhibits super conducting properties at higher temperature than known so far. The super conducting by the invented materials is exhibited at temperatures of over 110.degree. K. Various combinations of the components exhibits superconductivities even at temperatures of around 273.degree. K. or even around 300.degree. K. Contrary to known art superconducting materials, which require super cooled conditions and are suited only to sophisticated applications, and thereby have limited applications, the materials of this inventions do not always require super cooled conditions are suited for limitless applications and can work even at room temperature conditions. While a large range of choice of materials are suggested a few important combinations are made of oxides of Bismuth, Barium and Copper. Replacement of Barium by Thantalium gives additional advantages.

Abstract: There is disclosed the structure of a superconductive wiring fabricated on an insulating substrate comprising a conductive pattern having at least one wiring strip of a superconductive ceramic formed on the insulating substrate and a protective film covering the wiring pattern and formed of a basic oxide, the basic oxide hardly reacts with the superconductive ceramic because of the fact that most of the superconductive ceramics are bases, then the wiring strip is allowed to stay in the superconductive state for a prolonged period of time.

Abstract: A multilayer superconducting thin film composite article, comprising a carbon-containing substrate, and an interlayer comprising a material selected from the group consisting of zirconium, yttrium, niobium, and carbides and oxides thereof, platinum, iridium, gold, palladium, and silver, and an overlayer comprising an HTSC material. The carbon-containing substrate preferably comprises diamond and the interlayer preferably comprises a zirconium carbide sub-layer at the interface with the substrate, an intermediate sub-layer of zirconium metal, and an outer sub-layer of zirconium oxide at the interface with the HTSC material overlayer. The superconducting thin film material may comprise a copper oxide HTSC material, with YBaCuO, TlBaCaCuO, and BiSrCaCuO HTSC materials being preferred.

Abstract: A superconducting composite comprising a compound oxide type superconductor and an outer metal pipe on which said superconductor is supported, characterized in that (i) said outer metal pipe is made of at least one of metals selected from a group comprising gold, silver and platinum metals and their alloys or (ii) an intermidiate layer made of these precious metals is interposed between the compound oxide and the metal pipe.The composite may be in a form of a solid pipe or a hollow pipe having a superconducting thin layer deposited on an inner surface of the metal pipe.

Abstract: An excellent oxide series superconductive sintered body can be provided which can be joined to a metallic member easily and economically at low temperatures without causing peeling-off and deformation of the metallic member, cracks in the sintered body, and deterioration of the sintered body, by coating the surface of the sintered body with a coating metal. A method of producing the sintered body having the coating metal is also provided.

Abstract: A tape based on a superconducting oxide containing Cu-O, the tape being characterized by the fact that it comprises a substrate of flexible metal or composite material having a rectangular cross-section and provided on at least one of its faces with a cavity-free film of perovskite type superconducting oxide having congruent or quasi-congruent melting or peritectic decomposition close to a eutectic point, the thickness of said film lying in the range 1 .mu.m to 100 .mu.m, the orientation of the C axis of the superconducting crystals being perpendicular to said face of said substrate.

Abstract: A phase shifter having a reference path and a delay path, light sources, and superconductive switches. Each of the superconductive switches is terminated in a virtual short circuit, which may be a radial stub. Switching between the reference path and delayed path is accomplished by illuminating the superconductive switches connected to the desired path, while not illuminating the superconductive switches connected to the other path.

Abstract: An oxide superconductor having a high critical temperature is provided with a passivation coating comprising a first layer of a Group II oxide, such as magnesium oxide, and a second layer of a polymer, such as polyimide. The Group II oxide is formed under conditions to be substantially amorphous. After depositing the Group II layer, the encapsulated superconductor is heated to an elevated temperature for a period of time in an oxidizing atmosphere. This restores the high critical temperature to its original value. The polymer is then coated on top of the Group II oxide and cured. The passivation coating is resistant to strong acids, strong bases, and water, is robust, hard, and resilient against scratching.

Abstract: A superconducting ceramics elongated body comprising a flexible ceramics elongated substrate and an oxide ceramics superconducting layer formed at least on a part of the surface of the ceramics elongated substrate to longitudinally extend along the ceramics elongated substrate. The superconducting ceramics elongated body further comprises a protective layer of ceramics containing a nitride, which is provided to at least cover the surface of the superconducting layer exposed on the ceramics elongated substrate. A method of manufacturing a superconducting ceramics elongated body by forming a longitudinally continuous superconducting layer on at least a part of the surface of a flexible ceramics elongated substrate. The superconducting layer is formed on the elongated substrate by a sol-gel method, a coating/sintering method, evaporation under oxygen ions, deposition from a fluoride solution or oxidation after application of corresponding fluorides.

Abstract: A superconductive system for the lossless transmission of electrical current comprising a thin film of superconducting material Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x epitaxially deposited upon a KTaO.sub.3 substrate. The KTaO.sub.3 is an improved substrate over those of the prior art since the it exhibits small lattice constant mismatch and does not chemically react with the superconducting film.

Abstract: Superconducting ceramic material is woven into an interconnected structure and embedded in a polymer to produce a flexible, superconducting ceramic material. The polymer also provides protection from moisture. The ceramic polymer composite is fabricated by soaking a carbon fabric in a solution of metal nitrates, ethylene glycol and citric acid to yield a nominal composition of, for example, YBa.sub.2 Cu.sub.3 O.sub.7-x. Heat treatment results in the decomposition of the nitrates, organics and carbon fabric to produce an interconnected structure of the superconducting ceramic material which takes the shape of the original carbon fabric on a reduced scale. In addition, the processing conditions yield significant grain orientation. The superconducting grains of the ceramic material align along the direction of the original fabric weave which provides an improvement of the critical current densities.

Abstract: Disclosed is an oxide superconductor, wherein at least the surface layer has a chemical composition represented by the following formula:La.sub.x Sr.sub.y NbO.sub.zwherein0<x<1,0<y<1, and1<z<4,and has a critical temperature (Tc) higher than 100.degree. K.This superconducotr has a high critical temperature and is rendered superconducting by cooling with cheap liquefied nitrogen.This superconductor is prepared by a process comprising carrying out sputtering in an argon atmosphere by using one of NB and an La--Sr--Cu--O oxide as the substrate and the other as the target under such a temperature condition that substitution of Cu by Nb is caused, an quencing the formed film.

Abstract: An oxide superconductor having oxide superconductor layers and metal material layers, which are alternately laminated on each other by a desired number of times, and a method of manufacturing the same.

Abstract: A substrate for supporting a ceramic superconductor comprises a metallic base member precoated with an yttrium oxide, rare earth oxide, or zirconium oxide layer and having a constituent oxide former which establishes an oxide layer with the yttrium oxide, rear earth oxide, or zirconium oxide on the surface of the substrate. A layer of ceramic superconducting material covers the substrate with the oxide layer between the metallic base member and the ceramic superconductor layer to inhibit the interdiffusion of respective constituent elements between the metallic base member and the ceramic layer. For applications requiring the transmission of electrical current through the ceramic layer over relatively extensive distances, the substrate can be formed as a wire or ribbon.

Abstract: A superconducting oxide wire and a method of manufacturing the same are disclosed. The wire comprises a pipe made of a metal and a superconducting oxide material filling the interior of the pipe and comprising superconducting oxide grains which are bonded to each other and which have a perovskite crystal structure having a C face and a C axis. The superconducting oxide grains contain more than 50 vol % of plate-shaped grains of which the length in the direction of the C face is greater than the length in the direction of the C axis. The C faces of most the plate-shaped grains are arranged to be directed toward longitudinal axis of the pipe.

Abstract: An oxide superconductor cable and a method of producing the same. The oxide superconductor cable includes a ceramic fiber and an oxide superconductor layer coated over the ceramic fiber. Such a structure of the cable provides flexibility to it to some extent and enables it to become relatively thin.

Abstract: Superconductive structures and a method of forming the same wherein an assembled mass (12) of superconductive particles, or of a mixture of superconductive particles and particles having other properties, are formed into a desired confined configuration and consolidated into a rigid useful unitized body through shock-wave treatment performed at relatively lower temperatures.

Abstract: A ceramic superconducting member comprises a base material composed of a ceramic superconductive material such as Y.sub.1.0 Ba.sub.2.0 Cu.sub.3.0 O.sub.7-x, and a protective layer of a ceramic material such as MgO formed on the surface of the tape-like base material.

Abstract: This is a method for making an ohmic connection between a semiconductor and oxide superconductor, the connection being such that current can pass between the semiconductor and the superconductor without going through a degraded portion which is greater than the coherence length of the superconductor. The method can comprise depositing a buffer layer (which is essentially inert to the oxide superconductor) on a first portion of a semiconductor substrate, and depositing oxide superconductor on the barrier layer, and depositing a superconductor contact layer (e.g. of gold or silver) on the oxide superconductor, and depositing a semiconductor contact layer on a second portion of the semiconductor substrate (the semiconductor contact layer being, for example, of aluminum, or a refractory metal silicide); and depositing a layr (e.g.

Abstract: An electronic device substrate includes a spinel epitaxial film formed on a silicon single-crystal substrate and an oxide superconductor layer formed on the spinel film. The oxide superconductor layer is represented by formula P.sub.x (Q,Ca).sub.y Cu.sub.z O.sub..delta. and contains at least one element of Bi and Tl as P and at least one element of Sr and Ba as Q. Composition ratios fall within ranges of 0.08.ltoreq.x/(x+y+z).ltoreq.0.41, 0.29.ltoreq.y/(x+y+z).ltoreq.0.47 and 1.ltoreq.Q/Ca.ltoreq.3.

Abstract: An integrated circuit having a superconductive wiring comprises a semiconductor substrate, an integrated circuit device formed on the semiconductor substrate and a wiring connected to the integrated circuit device. The wiring is formed of a superconductive material and has a wide portion for heat radiation. The manufacturing method of the same comprises the steps of preparing a semiconductor substrate, forming an integrated circuit device on the semiconductor substrate, and connecting a wiring having a wide portion for heat radiation and formed of a superconductive material to the integrated circuit device on the semiconductor substrate.

Abstract: The present invention relates to a superconducting ceramic structure consisting of a superconducting ceramic substrate whose surface carries a film plasma-polymerized from a silazane bond-containing organosilicon compound. This structure is characterized by the absence of deterioration in its superconducting properties even upon contact with water or water vapor, and thus by the long-term retention of its superconducting properites.

Abstract: A superconducting circuit board is provided comprising a sintered alumina board containing more than 99% by weight of alumina and an interconnection pattern of an superconducting ceramics formed on the alumina board. Adhesion of the interconnection pattern to the alumina board is improved by an addition of Ti or Si coupling agent to a paste for forming the interconnection pattern. The use of copper powder in place of copper oxide powder as an ingredient forming a superconducting ceramics in the paste is advantageous for printing and obtaining a uniform superconducting ceramic pattern.

Abstract: A joint sintered high-temperature superconductive ceramic article is obtained by joining two sintered high-temperature superconductive ceramic masses formed of oriented crystal grains in such a manner that the directions of grain-orientation are different across the interface of union and pressing the joined ceramic masses against each other perpendicularly to the interface of union and, at the same time, heating them.

Abstract: A superconducting fiber comprising a core filament composed of an oxide such as MgO and a superconducting thin film layer composed of superconducting compound oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-.delta. and deposited continuously on an outer surface of said core filament.

Abstract: A superconducting pattern formed from a superconducting ceramic film is illustrated. The pattern is made in the form of a coil which is embeded in an insulating ceramic film. The insulating film is made of a ceramic material whose termal expansion coefficient is approximately equal to that of the coil.

Abstract: A ceramic superconductor layer formed on a substrate is passivated by a plasma polymerized film formed on a surface of the ceramic superconductor layer so as to have a thickness of 0.5 to 100 nm, by a conventional plasma discharging method using an organic gas such as trifluoromethane gas. According to spectroscopic analysis, the plasma polymerized film includes fluorocarbon bonds or groupings, and further, bonding between fluorine and yttrium, barium and copper is observed at the interface between the ceramic superconductor layer and the plasma polymerized film. An electronic minute device including the ceramic superconductor layer is fabricated by conventional patterning of the ceramic superconductor layer passivated by the plasma polymerized film.

Abstract: A high Tc superconducting ceramics material is produced by mixing ceramic constituents with an alcohol or a freon before firing. The alcohol or freon functions to reduce the ceramics during firing so that excess oxygen can be eliminated from the superconducting structure. The superconducing ceramics then are coated with an organic resin film in order to avoid the influence of air.

Abstract: High T.sub.c superconductor quantum interferometric devices are disclosed. Such devices are especially suited for detecting small changes and spatial variation in magnetic field. Such detection finds important application in NDE evaluation of metals, in the evaulation of magnetic susceptibilities and in magnetic resonance spectrometers.

Abstract: An electrically conductive article is disclosed comprised of a support, a barrier and a heavy pnictide mixed alkaline earth copper oxide crystalline coating. The support is an austenitic metal alloy of chromium and one or more group VIII period 4 metals, and the barrier is comprised of a zirconia layer containing fissures and an oxide compatible with the electrically conductive crystalline layer located in the fissures.

Abstract: Articles are disclosed in which an electrically conductive layer on a substrate exhibits a superconducting transition temperature in excess of 30.degree. K. Conductive layers are disclosed comprised of a crystalline rare earth alkaline earth copper oxide. Processes of preparing these articles are disclosed in which a mixed metal oxide precursor composition is coated and heated to its thermal decomposition temperature to create an amorphous mixed metal oxide layer. The amorphous layer is then heated to its crystallization temperature.

Abstract: The present invention provides a shaped superconductor article such as wire, tape or disk, comprising an oxide superconductor phase and a metal phase in a monolayered or multilayered form, the metal phase comprising a copper, iron, nickel or titanium base alloy containing 1 to 10% by weight of aluminum and having an oxygen-impermeable oxide film formed thereon, preventing the diffusion of oxygen from the oxide superconductor phase to the metal phase.