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91. 发明专利

JP2001035948A HIGH FREQUENCY SEMICONDUCTOR ELEMENT 失效
公开(公告)号：JP2001035948A
公开(公告)日：2001-02-09
申请号：JP20867099
申请日：1999-07-23
申请人： HITACHI LTD
发明人： SAITO RYUICHI , KONDO YASUO , AONO YASUHISA
IPC分类号： H01L23/02
摘要： PROBLEM TO BE SOLVED: To enhance heat dissipation performance, matching of the coefficient of thermal expansion with a semiconductor chip, easiness of machining and light weight performance by composing a base substrate of composite material having a specified coefficient of thermal expansion, thermal conductivity of specified level or above, and Vickers hardness of a specified level or below. SOLUTION: A base substrate 102 is composed of composite materials of Cu and Cu20 having a coefficient of thermal expansion of 15×10-6/ deg.C, and thermal conductivity of 130 W/mk. A brazing material 113, e.g. solder, is applied onto the base substrate 102 and the electrode on the surface of a high frequency semiconductor chip 101 is connected with a terminal 104 through a wire 103. The terminal 104 is sealed of an insulating material 105, e.g. ceramics or glass, using brazing materials 110, 111. Furthermore, a frame 106 is jointed to a sealing material 107 through a brazing material 112 and then the sealing material 107 is welded to a cover 108 thus completing the high frequency semiconductor chip.

92. 发明专利

JP2000313905A COMPOSITE MATERIAL AND ITS VARIOUS USES 失效
公开(公告)号：JP2000313905A
公开(公告)日：2000-11-14
申请号：JP12128599
申请日：1999-04-28
申请人： HITACHI LTD
发明人： KONDO YASUO , OKAMOTO KAZUTAKA , ABE TERUYOSHI , KANEDA JUNYA , AONO YASUHISA , SAITO RYUICHI , KOIKE YOSHIHIKO
IPC分类号： H01L21/683 , B22F3/14 , B22F3/15 , B22F7/00 , C22C1/04 , C22C1/05 , C22C1/10 , H01L21/68 , H01L23/373
摘要： PROBLEM TO BE SOLVED: To provide a composite material having high thermal conductivity, a low coefficient of thermal expansion, and high plastic workability, and its various uses using the same, such as a semiconductor device. SOLUTION: The composite material is composed particularly of a Cu alloy containing 5-80 vol.% cuprous oxide particles and is constituted of an iostatically pressed sintered compact. This composite material is provided with (5 to 17)×10-6/ deg.C coefficient of thermal expansion at temperatures ranging from room temperature to 300 deg.C (30 to 375) W/m.K thermal conductivity, and 10 to 85% IACS electric conductivity. This composite material is applicable to a heat dissipation plate of a semiconductor device, an electrode plate of electrostatic adsorption equipment, etc.

93. 发明专利

JP2000265227A COMPOSITE MATERIAL, ITS MANUFACTURE, AND USE THEREOF 失效
公开(公告)号：JP2000265227A
公开(公告)日：2000-09-26
申请号：JP6954099
申请日：1999-03-16
申请人： HITACHI LTD
发明人： OKAMOTO KAZUTAKA , KONDO YASUO , ABE TERUYOSHI , AONO YASUHISA , KANEDA JUNYA , SAITO RYUICHI , KOIKE YOSHIHIKO
IPC分类号： C22C1/05 , B22F1/00 , C22C1/10 , C22C9/00 , C22C29/12 , C22C32/00 , C22F1/08 , H01L23/14 , H01L23/34 , H01L23/373 , H01L23/433 , H01L25/07
摘要： PROBLEM TO BE SOLVED: To obtain a composite material excellent in plastic workability, and to provide a method of its manufacture, a heat-liberation substrate for semiconductor device, and a semiconductor device using same. SOLUTION: The composite material consists of a metal and an inorganic compound and this inorganic compound has a dendrite or rod-liek form. Particularly, the composite material is a copper matrix composite having a composition consisting of 10-55 vol.% cuprous oxide (Cu2O) and the balance copper (Cu) with inevitable impurities and having (5×10-6 to 17×10-6)/ deg.C coefficient of linear expansion in the temperature range between room temperature and 300 deg.C and (100 to 380) W/m.k thermal conductivity. This composite material can be manufactured by a series of melting, casting, and working processes and is applicable to a cooling wheel for a semiconductor device.

94. 发明专利

JPH11324983A MOTOR FAN AND IMPELLER USED IN THE SAME 失效
公开(公告)号：JPH11324983A
公开(公告)日：1999-11-26
申请号：JP13796198
申请日：1998-05-20
申请人： HITACHI LTD
发明人： OBANA TAKESHI , NAKAMURA KIYOMI , INAGAKI MASATOSHI , AONO YASUHISA
IPC分类号： F04D27/00 , F04D29/00 , F04D29/30
摘要： PROBLEM TO BE SOLVED: To reduce the air resistance of an impeller and improve the total rigidity of the impeller and the rotating speed of a motor fan by integrally molding one of the front and rear plates of the impeller and the blades with the granulated crystalline magnesium alloy casting. SOLUTION: A front plate 101 and a blade 103 are integrally formed by the granulated crystalline magnesium alloy casting. Accordingly the fastening projections for fixing the blades 103 do not exist on an upper face of the front plate 101, and the air resistance on the upper face of the front plate 101 can be reduced. Further a specific gravity of the magnesium alloy is about 1.8, so that the weight can be reduced to about 2/3 in comparison with a specific greavity of an aluminum alloy 2.7. Thereby the load applied to a rotary shaft can be reduced, the rigidity of an impeller can be improved, and further the rotating speed of the fan motor can be improved.

95. 发明专利

JPH0857637A METHOD FOR REPAIRING MEMBER RADIATED WITH NEUTRON 失效
公开(公告)号：JPH0857637A
公开(公告)日：1996-03-05
申请号：JP20173994
申请日：1994-08-26
申请人： HITACHI LTD
发明人： KANEDA JUNYA , URASHIRO KEIICHI , AONO YASUHISA , MATSUMOTO TOSHIMI , KOBAYASHI MASAHIRO , KATO TAKAHIKO , NAGATA TETSUYA
IPC分类号： G21C19/02 , B23K9/00 , B23K9/235 , B23K17/00 , B23K31/00
摘要： PURPOSE: To prevent the weld crack in the weld repair of the crack defect generated in a structure or equipment irradiated with neutron within a reactor. CONSTITUTION: Dislocation is introduced by a method to give the compressive residual stress in the surface region of a structure and equipment irradiated with neutron, He is trapped by the dislocation through the heat treatment within the temperature range of 500-900 deg.C after the compressive residual stress is given, the formation of He bubbles in the grain boundary to cause the weld crack is suppressed to prevent the weld crack. This constitution achieves the weld repair to prevent the weld crack when the crack defect is generated in the structure and equipment irradiated with neutron within the reactor, and the effect to improve the soundness of a nuclear power generating plant is obtained.

96. 发明专利

JPH0775893A METHOD FOR REPAIRING STRUCTURE AND PREVENTIVE MAINTENANCE METHOD 失效
公开(公告)号：JPH0775893A
公开(公告)日：1995-03-20
申请号：JP22023993
申请日：1993-09-03
申请人： HITACHI LTD
发明人： URASHIRO KEIICHI , KATO TAKAHIKO , KUROSAWA KOICHI , AONO YASUHISA , MATSUMOTO TOSHIMI , SAKAMOTO MASAHIKO , HAYASHI EISAKU , TAMAI YASUKATA , TSUJIMURA HIROSHI
IPC分类号： B23K26/00 , B23K31/00
摘要： PURPOSE:To provide a repairing method where through damages due to the propagation of cracking caused in a structure and equipment can be prevented, and subsequent cracking are difficult to be caused in the repaired part. CONSTITUTION:In a repairing method of a structure 1 where crack-shaped defects are present, the first process where the thermal energy is applied in the region 3 in which defects of the structure 1 are caused and the region is solidified after it is melted, and the second process where the thermal energy is given in the surface part of the region 3, and after the surface part 6 of the region 3 is re-melted, the re-melted part is solidified at the cooling speed to form the dendrite of >=0.1mum to

97. 发明专利

JPH06289184A REPAIR WELDING EXECUTION FOR NEUTRON IRRADIATION MEMBER 失效
公开(公告)号：JPH06289184A
公开(公告)日：1994-10-18
申请号：JP7925593
申请日：1993-04-06
申请人： HITACHI LTD
发明人： KONUMA TSUTOMU , MATSUMOTO TOSHIMI , URASHIRO KEIICHI , KANEDA JUNYA , AONO YASUHISA , KOBAYASHI MASAHIRO , TAMAI YASUKATA , NAGATA TETSUYA , HAYASHI EISAKU , TSUJIMURA HIROSHI , SUZUKI KUNIHIKO
IPC分类号： B23K9/00 , B23K9/23 , B23K31/00 , G21C19/02
摘要： PURPOSE:To prevent the crack of a repair welded part by carrying out the previous cooling at the temperature lower than the atmosphere temperature and offsetting the tensile residual stress generated by welding by releasing the compression strain generated by the precooling. CONSTITUTION:On an irradiation member 1 restrained by a structure article 4, a crack defect 2 generated by being applied with the thermal neutron irradiation brittlement is welding-repaired during operation. In this case, an irradiation member cooling part 3 is cooled to a temperature lower than the room temperature, and the irradiation member 1 is contracted, and in this state, welding is completed. In this case, if the welding repair quantity increases, the cooling width is spread, and the cooling at the lower temperature is performed. Accordingly, the irradiation member 1 in the contraction state offsets the generation of the welding residual stress by the expansion after the welding repair. Further, since the cooling for the cooling part 3 cools also the part of the defect 2, the diffusion and collection of He gas due to the welding heat are suppressed. Accordingly, the generation of the residual stress ant the redistribution to the grain boundary field of He gas are reduced to suppress the welding crack.

98. 发明专利

JPH06289183A REPAIR OF STRUCTURE IN NUCLEAR REACTOR 失效
公开(公告)号：JPH06289183A
公开(公告)日：1994-10-18
申请号：JP7925493
申请日：1993-04-06
申请人： HITACHI LTD
发明人： URASHIRO KEIICHI , KANEDA JUNYA , MATSUMOTO TOSHIMI , KONUMA TSUTOMU , AONO YASUHISA , KOBAYASHI MASAHIRO , TAMAI YASUKATA , NAGATA TETSUYA , KATO TAKAHIKO , HAYASHI EISAKU
IPC分类号： B23K9/00 , B23K9/04 , G21C19/02
摘要： PURPOSE:To prevent the generation of the crack in a repaired part by applying the surface fusion processing in a region where the welding thermal influence is predict before a plate member is installed, and carrying out the fillet welding for the plate member edge part. CONSTITUTION:On the surface of a structure body 2 made of SUS304 stainless steel which is applied with the irradiation of all neutrons and on which crack defects 1 exist, a surface fused part 4 is formed through the TIG arc before a plate member 3 made of SUS316L stainless steel is covered. Then, the plate member 3 is covered, and the fillet welding is performed by SUS308L component through the TIG arc, feeding a filler wire having a diameter of about 1mm. Accordingly, He in the surface fused part 4 is removed or reduced, and the generation of new crack is prevented in all the parts of a fused part 5 in the fillet welding, thermal influence part 6, surface fused part 4, and the structure body 2.

99. 发明专利

JPH0612926A SUPERCONDUCTIVE WIRE AND COMPOSITE SUPERCONDUCTOR 失效
公开(公告)号：JPH0612926A
公开(公告)日：1994-01-21
申请号：JP17231692
申请日：1992-06-30
申请人： HITACHI LTD
发明人： AONO YASUHISA , IIDA FUMIO , IKEDA SHINZO , KATO TAKAHIKO , IZUMITANI MASAKIYO , KODAMA HIDEYO
IPC分类号： H01B12/10 , C22C1/05 , H01B13/00 , H01L39/14 , H01L39/24
摘要： PURPOSE:To provide a superconductive wire of an improved mechanical property without increasing the weight and deteriorating electric and thermal characteristics as an Al stabilizer, a method for manufacturing the superconductive wire, and a highly strong Al sintered alloy and powder thereof which are used for manufacturing the superconductive wire. CONSTITUTION:In a superconductive wire where superconductive filaments 15 are embedded in an Al alloy 16 with a small amount of ceramic super fine particles 17 dispersed in highly pure Al, the numerous ceramic super fine particles are dispersed within an area of 1mum . The areas where the numerous ceramic super fine particles are dispersed per mum are provided almost all over the alloy.

100. 发明专利

JPH05138379A METHOD FOR PREVENTING CRACKING IN STRUCTURE 失效
公开(公告)号：JPH05138379A
公开(公告)日：1993-06-01
申请号：JP27917191
申请日：1991-10-25
申请人： HITACHI LTD
发明人： URASHIRO KEIICHI , AONO YASUHISA , AOTA KINYA , ENOMOTO KUNIO , KUROSAWA KOICHI , TSUJIMURA HIROSHI
IPC分类号： B23K26/382
摘要： PURPOSE:To prevent cracking in a structure of a plant by forming a stop hole by irradiating the tip part of a notch in the structure with a laser beam. CONSTITUTION:The laser beam 2 is radiated to the tip part of the notch 6 in the structure 5 with a notch 6 shape or the tip part of cracking in the structure in which crack is generated. The stop hole 7 is formed by this irradiation. By radiating the laser beam to the tip part of notch or cracking, that part is smelted and worked into round shaped solidified structure contg. ferrite. By radiating the laser beam to the inside surface and the vicinity of the stop hole, that part is subjected to solution treatment. By radiating the laser beam to both sides of notched part or cracking, those parts are heated and cooled. In this way, the life of the plant of a light-water reactor or the like can be prolonged.

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