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71. 发明专利

JPH0222431A COPPER WIRE ROD FOR EXTRA FINE WIRE 失效
公开(公告)号：JPH0222431A
公开(公告)日：1990-01-25
申请号：JP17233788
申请日：1988-07-11
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TOMINAGA HARUO , TAKAYAMA TERUYUKI
IPC分类号： C22C9/00 , H01B1/02 , H01B5/02
摘要： PURPOSE:To obtain the title wore rod having high electric conductivity, contg. less wear of a die and in which wire disconnection is hard to occur at the time of making copper into an extra fine wire by regulating the content of O, C and S in copper to the speific value. CONSTITUTION:In the copper wire rod for an extra fine wire,

72. 发明专利

JPH01320256A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01320256A
公开(公告)日：1989-12-26
申请号：JP15298688
申请日：1988-06-21
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TAKAYAMA TERUYUKI , TOMINAGA HARUO , TOMOMATSU KAZUHIKO
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B12/02 , H01B13/00 , H01L39/24
摘要： PURPOSE:To ensure superior fillability, to obtain a high density molded body and to increase the critical current density of an oxide superconductor by classifying powdery starting material for a YBCO superconductor into three kinds of powders having different prescribed particle sizes, mixing the powders in a prescribed ratio and press-molding this mixture. CONSTITUTION:Powdery starting material for a Y-Ba-Cu oxide (YBCO) superconducting material is classified into first powder having 10-12mum particle size, second powder having 4-5mum particle size and third powder having

73. 发明专利

JPH01261264A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01261264A
公开(公告)日：1989-10-18
申请号：JP8976188
申请日：1988-04-12
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TAKAYAMA TERUYUKI , TOMINAGA HARUO , OGURA YOSHIO
IPC分类号： H01L39/24 , C01G1/00 , C01G29/00 , C04B35/00 , C04B35/45 , H01B12/02 , H01B13/00
摘要： PURPOSE:To increase the critical current density and prevent the generation of cracks, by charging powdery raw materials for a Bi-Sr-Ca-Cu oxide superconductor in a mold or a package and forming in a reduced pressure atmosphere, thereby increasing the density of the formed product. CONSTITUTION:Powdery oxides or carbonates of Bi, Sr, Ca and Cu are mixed at prescribed ratios and calcined to obtain a sintered material of BSCCO oxide, which is crushed into powder. The powder is pressed to attain a void ratio of 55-65%. The powder or pressed powder is charged into a mold or a package, for example, charged on the lower punch 8 of a die 1 placed in a vessel 5. The vessel 5 is evacuated and maintained to 10Torr or below and the powder is subjected to compression molding with the die 1 and the punches 7, 8.

74. 发明专利

JPH01234530A AUTOMATICALLY CONTROLLED MELTING FURNACE 失效
公开(公告)号：JPH01234530A
公开(公告)日：1989-09-19
申请号：JP5850688
申请日：1988-03-14
申请人： FUJIKURA LTD
发明人： TOMINAGA HARUO , TAKAYAMA TERUYUKI , SUZUKI KAZUMOTO
IPC分类号： C22B9/16 , C22B15/00 , F27D19/00
摘要： PURPOSE:To prevent the hanging in a melting furnace by monitoring the combustion state at all times, subjecting the brightness of the video to pattern recognition, converting the same to an electric signal and feeding the signal back to burner combustion pressure control. CONSTITUTION:One terminal of an image fiber 1 such as optical fiber is set in the peep window of respective burners of respective zones A-C and an automatic combustion state monitor device 3 is mounted to the other terminal so that the video signal is converted to the electric signal. The visual field of the peep window brightens when the hanging begins to arise and there is no fall of materials. The electric signals are classified to several stages by the area ratios of brightness and darkness and these signals are fed back to control valves for controlling the combustion pressure, etc. The results of the residual hydrogen quantity by the monitor in a combustion atmosphere measuring and adjusting device 5 are fed back to the orifice control mechanisms near the burners to adjust the combustion atmosphere. The quantity of the molten metal in a holding furnace is known from the signal of a tilting angle 6 and is sent to an automatic combustion pressure control device 4 by which the quantity is compared with a reference value and the combustion pressure is increased or decreased.

75. 发明专利

JPH01231213A COPPER COVERED STEEL WIRE 失效
公开(公告)号：JPH01231213A
公开(公告)日：1989-09-14
申请号：JP5789588
申请日：1988-03-10
申请人： FUJIKURA LTD
发明人： TAKAYAMA TERUYUKI , TOMINAGA HARUO , NISHIYAMA SADAYOSHI , MIYAUCHI KENICHI
IPC分类号： B21F19/00 , H01B5/02 , H01B5/08 , H01B7/00
摘要： PURPOSE:To enable obtaining a stranded wire superior in both flexing resistance and solderbility by covering the core of a steel wire having a specific carbon content with a copper layer. CONSTITUTION:The core of a steel wire containing 0.005 to 0.06 weight percentage of carbon is covered with a copper layer. When the carbon content exceeds 0.06 weight percentage, the degree of work hardening of the steel wire increases so much that the steel wire is liable to fracture when subjected to a bending and twisting processes. Also, when the carbon content drops below 0.005 weight percentage, the steel wire is frequently fractured due to an intervening material. Preferably. the coverage ratio of the copper is 20 to 60% by a volume ratio. According to the aforesaid construction, it is possible to obtain a wire for stranding superior in solderbility and platability on the surface and in strength against repeated and remarkable bending processes.

76. 发明专利

JPH01208430A COPPER ALLOY WIRE ROD 失效
公开(公告)号：JPH01208430A
公开(公告)日：1989-08-22
申请号：JP3436088
申请日：1988-02-17
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TOMINAGA HARUO , TAKAYAMA TERUYUKI
IPC分类号： C22C9/00 , H01B1/02 , H01B7/02
摘要： PURPOSE:To obtain the title wire rod having excellent wire drawability, easy to convert into an extra fine wire and easy to obtain desired mechanical characteristics without impairing its electric conductivity by forming the wire rod from the compsn. contg. specific compositional amounts of Sb and Zr, contg. regulated O contents and the balance consisting of Cu. CONSTITUTION:The copper alloy wire rod contains 50-200ppm Sb and 100-500ppm Zr, in which O is regulated to =0.1mm wire diameter. The above wire rod has sufficient electric conductivity and, owing to the regulation of O contents and the incorporation of suitable amounts of Sb, has excellent wire drawability of suitable elongation, so that even the extra fine wire having

77. 发明专利

JPH01179704A SEPARATION OF SINGLE CRYSTAL OF SUPERCONDUCTING OXIDE 失效
公开(公告)号：JPH01179704A
公开(公告)日：1989-07-17
申请号：JP267988
申请日：1988-01-09
申请人： FUJIKURA LTD
发明人： TOMINAGA HARUO , TAKAYAMA TERUYUKI , KUROSAKA AKITO
IPC分类号： B03C1/00 , B03C1/021 , C01B13/16 , C01G1/00 , C01G3/00 , H01B12/00 , H01B13/00
摘要： PURPOSE:To separate easily and efficiently single crystals of a superconducting oxide from a nonsuperconducting coagulated product, both being contained in a mixture utilizing Meissner effect by pulverizing the mixture then feeding the pulverized product to above a magnet disposed in liquid N2. CONSTITUTION:For example, a mixture 4 contg. a mixture of single crystals of a superconducting oxide and a nonsuperconducting oxide obtd. by cooling a melt slowly is crushed to powder, granules, or lumps, then the crushed product is dropped through a gap between a peripheral wall of a heat-insulated vessel 1 having an open top end and a heat-insulating plate 9 onto a magnet 2 mounted on a magnet stand 2a in the vessel 1 and placed obliquely toward a center side of the vessel 1 and cooled to the b.p. of liquid N2 by dipping in liquid N2 3. Whirling up of the dropped crushed product 4 is prevented by a partition wall 5, and the crushed product 4 falls down along an inclined surface of the magnet 2. During the falling, single crystals 7 of a superconducting oxide is floated from the magnet 2 by the Meissner effect at the b.p. of liquid N2, and nonsuperconducting coagulated product 8 is fallen contacting with the surface of the magnet 2. Thus the both are separated by a separating plate 6.

78. 发明专利

JPH01167906A ZIRCONIUM COPPER COMPLEX COVERED WITH OXYGEN FREE COPPER 失效
公开(公告)号：JPH01167906A
公开(公告)日：1989-07-03
申请号：JP32784187
申请日：1987-12-23
申请人： FUJIKURA LTD
发明人： TOMINAGA HARUO , TAKAYAMA TERUYUKI , KUROSAKA AKITO
IPC分类号： C22C9/00 , H01B1/02
摘要： PURPOSE:To improve heat resistance and strengthening workability resistance by adding a trace quantity of zirconium to a base material of oxygen free zirconium copper and further covering the base material with the predetermined quantity of oxygen free copper. CONSTITUTION:The core material of a complex comprises oxygen free zirconium copper containing 0.0005 to 0.05wt.% of zirconium. This trace quantity of zirconium contained in the material causes a rise in the softening temperature of non-oxidized copper by 120 deg.C to 350 deg.C, thereby improving the heat resistance of a copper wire. This base material of oxygen free zirconium is covered with oxygen free copper by a volume ratio of 10% to 40%. According to the aforesaid construction, the ductility of the complex increases and, for example, if there appears an irregular surface around the core material due to a strengthening process such as a heading process, an extent of irregularity is alleviated with the covering material of oxygen free copper, thereby ensuring the freedom of a film from a crack.

79. 发明专利

JPH01159392A PRODUCTION OF HIGH PURITY ELECTROLYTIC COPPER 失效
公开(公告)号：JPH01159392A
公开(公告)日：1989-06-22
申请号：JP31788087
申请日：1987-12-16
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TOMOMATSU KAZUHIKO , TOMINAGA HARUO , TAKAYAMA TERUYUKI
IPC分类号： B01J20/12 , B01J39/02 , C25C1/12
摘要： PURPOSE:To produce high purity electrolytic copper without requiring a troublesome process by adding and dispersing copper-montmorillonite in an electrolytic soln. acidified with nitric acid, filtering the electrolytic soln. to remove impurities in the soln. and electrolytically refining copper in the resulting electrolytic soln. CONSTITUTION:Copper-montmorillonite is added and dispersed in an electrolytic soln. acidified with nitric acid. After impurity cations in the soln. are adsorbed between the montmorillonite layers, the electrolytic soln. is filtered. The impurity cations in the soln. are efficiently removed and a purified electrolytic soln. is obtd. Copper is electrolytically refined in the purified electrolytic soln. to produce high purity electrolytic copper. The pref. average particle size of the copper-montmorillonite is =about 10mg equiv. cation exchange capacity per 1l electrolytic soln.

80. 发明专利

JPS63255336A BONDING WIRE 失效
公开(公告)号：JPS63255336A
公开(公告)日：1988-10-21
申请号：JP9013087
申请日：1987-04-13
申请人： FUJIKURA LTD
发明人： KUROSAKA AKITO , TOMINAGA HARUO , TAKAYAMA TERUYUKI , SUZUKI SHIGEKI
IPC分类号： C22C9/00 , H01B1/02 , H01L21/60 , H01L23/48
摘要： PURPOSE:In case of bonding between a pole of semiconductor and an outer lead wire by the titled wire, to provide the wire with toughness and to enable to easily form a heat-melted ball at the tip of the wire which has sperical shape, suitable hardness and hardly disconnect from the tip of the wire by heat cycle, by adding specific ratios of P and Zr to high pure copper and forming a bonding wire. CONSTITUTION:The bonding wire is formed by the copper alloy in which, by weight, 0.003-0.02% P and 0.02-0.015% Zr are added to the high pure copper having >=99.99% purity. In this bonding wire, the neck disconnection at the time of bonding can be eliminated since the coarseness of crystal grains is suppressed by the addition of P. The wire breaking at the tine of bonding can be furthermore suppressed and semiconductor chip cracks can be prevented since the ball hardness and workability are suitably regulated by the incorporation of specific ratio of Zr into said alloy.

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