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公开(公告)号：JPH08190733A
公开(公告)日：1996-07-23
申请号：JP24464295
申请日：1995-09-22
Applicant: TORAY INDUSTRIES
Inventor： OKUYAMA FUTOSHI , NOBUMASA HITOSHI , OBAYASHI GENTARO , HIROTA KUSATO
Abstract: PURPOSE: To provide a phase change type optical recording medium capable of rewriting and having a high rate of erasure at the time of over-writing. CONSTITUTION: This optical recording medium has at least a 1st dielectric layer, a recording layer, a 2nd dielectric layer and an absorption correcting layer made of a material contg. one or more kinds of metallic materials as essential components and contg. at least one kind of compd. selected from among high m.p. carbides, oxides, borides and nitrides. The thickness of the 2nd dielectric layer is 1-50nm.
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公开(公告)号：JPH08124214A
公开(公告)日：1996-05-17
申请号：JP22375995
申请日：1995-08-31
Applicant: TORAY INDUSTRIES
Inventor： OKUYAMA FUTOSHI , NOBUMASA HITOSHI , OBAYASHI GENTARO , HIROTA KUSATO
IPC: G11B7/24
Abstract: PURPOSE: To record, erase and reproduce information with high density at high rate by forming a dielectric layer A, a recording layer B, a dielectric layer C, an absorption amount correction layer D containing W or MO, and a resin layer E sequentially and specifying the thicknesses of the layer B and C, respectively, at specific nm. CONSTITUTION: A polycarbonate substrate P is subjected to sputtering of ZnS added with SiO2 while turning in Ar gas atmosphere within a vacuum vessel thus forming a dielectric layer A of 250nm on the substrate P. It is then subjected to sputtering of an alloy target composed of Pd, Nb, Ge, Sb and Te to form a recording layer B having thickness of 10-45nm followed by formation of a 1-25nm thick dielectric layer C of same material as the layer A. Furthermore, a 1-200nm thick absorption amount correction layer D of W95, Cr41 (at.%) is formed thereon and an acryl based UV-curing resin is to form a resin layer E of 10μm. It is then stuck to an identical optical recording medium through adhesive. This medium can record, erase and reproduce information signals at high rate with high density.
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公开(公告)号：JPH0781933A
公开(公告)日：1995-03-28
申请号：JP22552093
申请日：1993-09-10
Applicant: TORAY INDUSTRIES
Inventor： HORIUCHI TAKESHI , NOBUMASA HITOSHI
Abstract: PURPOSE:To produce an electronic copper-contg. multiple oxide superconductor excellent in superconducting characteristics with a high reproducibility. CONSTITUTION:This superconductor has a laminar structure consisting of layers of an oxide represented by formula I (where M is at least one selected from among La, Nd, Sm and Eu, 0
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公开(公告)号：JPH0624741A
公开(公告)日：1994-02-01
申请号：JP17851392
申请日：1992-07-06
Applicant: TORAY INDUSTRIES
Inventor： NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To provide a copper multiple oxide superconductor high in Tc, producible under controlled carrier concentration. CONSTITUTION:The objective superconductor has such structure that one or more charge carrier feed layers consisting of a substance of composition formula (Ca1-alphaSralpha)betaCuOgamma(alpha, beta, and gamma are each a number satisfying the relationships: 0
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公开(公告)号：JPH05294621A
公开(公告)日：1993-11-09
申请号：JP2546393
申请日：1993-02-15
Applicant: TORAY INDUSTRIES
Inventor： NAKAMURA KAZUYA , NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To obtain a superconductor having high critical current density and capable of taking various kinds of superconducting transfer temperatures by constituting a specific copper complex oxide based superconducting substance and other specific copper complex oxide based superconducting substance in a layer structure. CONSTITUTION:The objective superconductor has a layer structure consisting of at least one kind of substance selected from a A group of formula I and at least one kind of substance selected from a B group of formula II, wherein 0
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Patent Agency Ranking
公开(公告)号：JPH05294619A
公开(公告)日：1993-11-09
申请号：JP2546193
申请日：1993-02-15
Applicant: TORAY INDUSTRIES
Inventor： NAKAMURA KAZUYA , NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To obtain a superconductor having a high critical current density and capable of taking various kinds of superconducting transfer temperatures by constituting a specific compound system in a layer structure. CONSTITUTION:Powders of oxides of La, Sr and Cu are mixed and the mixture is formed and sintered to afford a target 1 (A) of formula I. Then, La, Sr, etc., is mixed and sintered in the same manner as the component A to provide a target (B) of formula II. Then the components A and B are set in a chamber and a substrate of SrTiO3, etc., are opposed to these components and the substrate is heated to 400-900 deg.C in an oxidative atmosphere. Then an excimer laser having about 193nm wavelength, 15Hz oscillating frequency and about 1J/cm pulse energy density are alternately irradiated to these components A and B to deposit a constituent substance of these components A and B on the substrate. Then a thin film having a desired thickness is formed on the substrate to produce the objective superconductor having layer constitutions of formula I and formula II (0
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公开(公告)号：JPH0597432A
公开(公告)日：1993-04-20
申请号：JP25676391
申请日：1991-10-03
Applicant: TORAY INDUSTRIES
Inventor： NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To provide an La (2126) type superconductor having superconducting characteristics comparable to those of a conventional superconductor even at a low temp. during hot isostatic pressing under a high partial pressure of oxygen. CONSTITUTION:This superconductor is represented by a general formula (La1-etaBaeta)2-theta(Ca1-gammaMggamma)1+0Cu2Odelta (where 0
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公开(公告)号：JPH04114917A
公开(公告)日：1992-04-15
申请号：JP23635890
申请日：1990-09-05
Applicant: TORAY INDUSTRIES
Inventor： NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To obtain a superconductor having improve coordination superconductor with the same kind of superconductor and to use the superconductor and the same kind of superconductor having a superconducting transition temperature different from that of the superconductor by forming crystal containing a blocking layer of BaO/CuO/CuO/BaO type shown by the formula. CONSTITUTION:This superconductor consists essentially of a copper compound oxide shown by the formula (with the proviso that alpha is element selected from La and Pb; p is 0-0.2; q is 0.3-0.5; s is 5-5.8). The superconductor has a blocking layer of BaO/CuO/CuO/BaO type comprising a layer made of Ba, Sr, alpha and oxygen and a layer made of Cu and oxygen. The superconductor is produced by powder blending method, deposition method, sputtering method, etc., made into a tape state, linear state filamentous state and sheetlike state, etc., and used.
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公开(公告)号：JPH03187906A
公开(公告)日：1991-08-15
申请号：JP32759989
申请日：1989-12-18
Applicant: TORAY INDUSTRIES , HOKKO CHEM IND CO
Inventor： KANEKO MASAYOSHI , NONAKA TOSHINAKA , NOBUMASA HITOSHI , SHIMIZU KAZUHARU
Abstract: PURPOSE:To form a superconducting thin film having high critical temperature on a substrate readily oxidizable at high temperature by forming a thin film from a mixed solution comprising lead, Sr, Ca and Cu alkoxides or alkoxyalcoholates and polar organic solvent on a substrate, gelatinizing and burning. CONSTITUTION:A mixed solution comprising lead, Sr, Ca and Cu alkoxides or alkoxyalcoholates, an alkanolamine, an alcohol or an alkoxyalcohol and a polar organic solvent is prepared. For example, diethanolamine may be cited as the alkanolamine, ethanol as the alcohol and tetrahydrofuran as the polar organic solvent. A thin film of the mixed solution is formed on a heat-resistant substrate and the thin film is dried to give a gelatinized thin film comprising the alkoxides or the alkoxyalcoholates and the alkanolamine. Then, the gelatinized thin film is burnt together with the substrate to readily give a superconducting thin film having >=105K superconducting completion temperature.
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公开(公告)号：JPS6428228A
公开(公告)日：1989-01-30
申请号：JP9769488
申请日：1988-04-20
Applicant: TORAY INDUSTRIES
Inventor： MATSUMURA TERUICHIRO , SHIMIZU KAZUHARU , NOBUMASA HITOSHI
Abstract: PURPOSE:To obtain a superconducting material having excellent superconducting characteristics, such as the superconducting transition temperature or critical current density, containing silver and expressed by a specific composition formula, by blending compound powders of component elements at a desired ratio, firing, pulverizing, forming the resultant blended powder and firing the pressed blended powder. CONSTITUTION:Powders having =0; b>=0; 0
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