Swcc Showa Cable Systems Co., Ltd.

Oki Electric Industry Co., Ltd.

International Superconductivity Technology Center, the Juridical Foundation

International Superconductivity Technology Center, the Juridicial Foundation

International Superconductivity Technology Center, the Jurdical Foundation

Swcc Show Cable Systems Co., Ltd.

International Superconductivity Technology Center

Tsutomu Koizumi

Takayo Hasegawa

Atsushi Kaneko

Yuji Aoki

Yasuo Takahashi

Hiroshi Nakamura

Tatsuhisa Nakanishi

Disclosed are an oxide superconductor tape and a method of manufacturing the oxide superconductor tape capable of improving the length and characteristics of superconductor tape and obtaining stabilized characteristics across the entire length thereof. A Y-class superconductor tape (), as an oxide superconductor tape, comprises a tape () further comprising a tape-shaped non-oriented metallic substrate (), and a first buffer layer (sheet layer) () that is formed by IBAD upon the tape-shaped non-oriented metallic substrate (); and a second buffer layer (gap layer) (), further comprising a lateral face portion () that is extended to the lateral faces of the first buffer layer (sheet layer) () upon the tape () by RTR RF-magnetron sputtering.

Oxide superconductor cabling and method of manufacturing oxide superconductor cabling

This invention provides a rare earth-type tape-shaped oxide superconductor having excellent mechanical strength and superconducting properties and a composite substrate using for the same. Non-oriented and non-magnetic Ni-9 at % W alloy tapes () were bonded onto both sides of a non-oriented and non-magnetic hastelloy tape () by a normal temperature bonding process, and an Ni-3 at % W alloy tape () having a cubic texture was bonded onto the surface of the tape () by a normal temperature bonding process. Thereafter, the heat-treatment was given in a reducing atmosphere and a bonding layer () etc. was formed on the adhesive interface of each layer. Next, a (Ce, Gd)Ointermediate layer () and a CeZrOintermediate layer () by an MOD process, a CeOintermediate layer (), a YBCO superconducting film () by a TFA-MOD method, and a silver stabilization layer () were stacked sequentially on the surface of the tape (). A critical current value (Ic) of this superconductor showed 150 A.

Rare earth-type tape-shaped oxide superconductor and a composite substrate used for the same

A tape-shaped oxide superconductor includes a 15 to 100 nm-thick Ce&#x2014;Gd&#x2014;O-based oxide layer (Ce:Gd=40:60 to 70:30 molar ratio) and a 100 nm-thick Ce&#x2014;Zr&#x2014;O-based oxide layer (Ce:Zr=50:50 molar ratio) as first and second intermediate layers are formed by MOD on an Ni-base alloy substrate having a half value width (FWHM:&#x394;&#x3c6;) of 6.5 degrees. A 150 nm-thick CeOoxide layer as a third intermediate layer is formed on the second intermediate layer by RF sputtering. A 1 &#x3bc;m-thick YBCO superconducting layer is formed by TFA-MOD on the three-layer structure. In the tape-shaped oxide superconductor, the &#x394;&#x3c6; values of the first to third intermediate layers are (6.0 to 6.5) degrees, (6.0 to 6.6) degrees, and (6.0 to 6.6) degrees, respectively, and the Jc value of the YBCO superconducting layer in liquid nitrogen is 1.8 to 2.2 MA/cm.

Tape-shaped oxide superconductor

This invention provides a heat treatment apparatus for an oxide superconducting wire that is easy to control atmosphere during baking and can realize a high manufacturing speed. A heat treatment apparatus () comprises a heat treating furnace () and a cylindrical rotator (), rotatable about a horizontal rotating axis, provided within the heat treating furnace (). The rotator () in its cylindrical body () have a number of through-holes () formed evenly over the whole surface of the cylindrical body (). One end of the cylindrical body () is hermetically sealed by a lid. On the other end, a gas discharge pipe () for discharging gas within the cylindrical body to the outside of the heat treating furnace () is connected to the lid. A plurality of gas supply pipes () are symmetrically provided separately from each other on the outer surface of the cylindrical body (). A number of gas jet holes are formed in each of the gas supply pipe () so as to jet atmosphere gas toward the surface of the cylindrical body. A tape-shaped wire () formed of a precursor film of a YBCO superconducting layer is wound around the rotator () for heat treatment for superconductor formation.

Heat treatment apparatus for oxide superconducting wire

A semiconductor device includes a substrate having electrodes, a semiconductor element mounted on the substrate and having electrode pads, wires for respectively connecting the electrodes of the substrate and the electrode pads of the semiconductor element, and an encapsulating resin for sealing the semiconductor element and the wires. Markings are provided on the semiconductor device so as to avoid areas of the surface of the encapsulating resin which correspond to the semiconductor element and the tops of the wires. Thus, when the markings are placed upon the surface of the encapsulating resin, a reduction in the strength of the encapsulating resin due to the markings can be avoided.

Growing community of inventors

Tokyo, Japan

Tsutomu Koizumi