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101. 发明专利

JPH06349220A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPH06349220A
公开(公告)日：1994-12-22
申请号：JP13204193
申请日：1993-06-02
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO
IPC分类号： G11B5/31 , G11B5/58 , G11B21/21 , G11B9/00
摘要： PURPOSE:To obtain a magnetic disc device, in which the flying height of a magnetic head floated is detected regardless of the quality of material of a magnetic disc so that it can be kept low. CONSTITUTION:A magnetic head 115 has a thin-film magnetic head 100 detecting the magnetic signal of magnetic disc, a needle-shaped section 202 arranged so that a front end section is projected onto the floating surface of the magnetic head section and an arm 1 being connected to the needle-shaped section and generating displacement by interatomic force received by the needle-shaped section. Interatomic force between the magnetic disc and the needle-shaped section 202 is detected by sensing the displacement of the arm 1, and the thin- film magnetic head 100 is moved vertically so that the interatomic force is kept constant.

102. 发明专利

JPH06274811A PERPENDICULAR MAGNETIC HEAD 失效
公开(公告)号：JPH06274811A
公开(公告)日：1994-09-30
申请号：JP5838993
申请日：1993-03-18
申请人： HITACHI LTD
发明人： TAKAHASHI HIROMASA , MITSUOKA KATSUYA , KOMURO MATAHIRO
IPC分类号： G11B5/127 , G11B5/31 , H01F10/14 , H01F10/16
摘要： PURPOSE:To make it possible to execute effective writing in high-density recording by using iron nitride having a prescribed compsn. as a material for the magnetic material part of the magnetic head. CONSTITUTION:The iron nitride formed by combining nitrogen with Fe is used as a main magnetic pole material in order to generate a large magnetic field at the front end of the main magnetic pole of the perpendicular magnetic head. Fe16N2 of the iron nitride has a high saturation magnetic flux density and its density is about 2.9X10 G. This Fe16N2 is obtd. in a relatively short period of time by putting the Fe into plasma of nitrogen and regulating a substrate temp., plasma output and vacuum degree to adequate values. The saturation magnetic flux density increases extremely from 5.0at.% nitrogen quantity and is maximized at 11at.% and is approximated nearly to the value of the Fe16N2 at 11at.%. Then the effective writing is executed in the high-density recording by using the iron nitride contg. 5.0 to 12.0at.% nitrogen in the magnetic material part.

103. 发明专利

JPH02308504A HIGH SATURATION MAGNETIC FLUX DENSITY FE-N FILM 失效
公开(公告)号：JPH02308504A
公开(公告)日：1990-12-21
申请号：JP12885689
申请日：1989-05-24
申请人： HITACHI LTD , HITACHI KYOWA KOGYO KK
发明人： KOMURO MATAHIRO , KOZONO YUZO , HANAZONO MASANOBU , UEHARA SHIZUO
IPC分类号： C23C14/14 , C23C14/24 , H01F10/14 , H01F10/28 , H01F41/20
摘要： PURPOSE:To obtain a high saturation magnetic flux density of Fe-N film wherein the saturation magnetic flux density is 2.5T or more by growing an Fe-N film 430Angstrom or less in thickness on an Fe single crystal, and growing Fe16N2 stably in the specified orientation relations in the film. CONSTITUTION:An Fe film is deposited on a single crystal substrate of GaAs (100), and next the Fe film is deposited in 430Angstrom or less in N2 with high purity of electrolytic iron as evaporation source, and Fe16N2 is grown with the volume of a unit cell 205Angstrom or more, in the orientation of Fe16N2 (100) Fe (001), in an Fe-N film so as to obtain a film Bs>2.5T or more in saturation magnetic flux density. The half value width of the X-ray diffraction peak (200) of Fe single crystal being the ground is kept at 0.43 deg. or less, and the half value width of the diffraction peak (400) of Fe162 is kept at 0.57 deg. or more. During growth, 50 gauses or more are added in the C-axis direction of Fe16N2 so as to epitaxially grow it, and Fe16N2 is grown 37vol.% or more in volume ratio inside the Fe film which includes N atoms. Fe16N2 may be grown by applying ion beams, at an incident angle of 60 or more, to Fe atoms which are flown on the substrate.

104. 发明专利

JPH0230700A PRODUCTION OF FE16N2 FILM 失效
公开(公告)号：JPH0230700A
公开(公告)日：1990-02-01
申请号：JP17900888
申请日：1988-07-20
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO , KOZONO YUZO , MITSUOKA KATSUYA , NARUSHIGE SHINJI , HANAZONO MASANOBU
IPC分类号： C30B23/02 , C23C14/06 , C30B29/38 , H01F41/20
摘要： PURPOSE:To stably obtain a film containing Fe16N2 by glowing film containing Fe16N2 compound on epitaxially grown Fe. CONSTITUTION:A Fe substrate layer 2 is formed on a base plate 1 of single crystal such as Si, Ga or Ge and Fe is vapor-deposited under conditions of below 300 deg.C base plate temperature, >1X10 Torr N-gas pressure (PN2) in Fe depositing and below 100Angstrom /S depositing speed in N2 atmosphere to epitaxially grow a film 3 containing Fe16N2 compound having saturated magnetic flux density higher than saturated magnetic flux density of Fe.

105. 发明专利

JPH01215073A PHOTODETECTION DEVICE 失效
公开(公告)号：JPH01215073A
公开(公告)日：1989-08-29
申请号：JP3943388
申请日：1988-02-24
申请人： HITACHI LTD
发明人： ONO TOSHIYUKI , KASAI MASAHIRO , KOZONO YUZO , HANAZONO MASANOBU , KOMURO MATAHIRO
IPC分类号： H01L39/00 , G01J1/00
摘要： PURPOSE:To obtain an element for optoelectronics using a superconductive substance having a function not existing in the past by using the photoconductive substance showing a luminous phenomen to the prescribed light as the superconductor substance in order to make it to operate by irradiating the prescribed light on the superconductive substance being in a superconductive state. CONSTITUTION:A substance showing a luminous phenomeon to the prescribed light is used as a superconductive material. By irradiating prescribed light into the superconductive material, and detection of light is performed by use of the two facts: the superconductive current stops to flow; and luminance of specific wavelength is generated. The information on the absence or the presence of incident light is outputted in the form of the presence or the absence of the superconductive current and the absence or the presence of luminance in two directions and in the reverse phase.

106. 发明专利

JPS6428336A SUPERCONDUCTIVE SUPERLATTICE 失效
公开(公告)号：JPS6428336A
公开(公告)日：1989-01-30
申请号：JP18336187
申请日：1987-07-24
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO , KOZONO YUZO , YAZAWA YOSHIAKI , HANAZONO MASANOBU
IPC分类号： H01B12/00 , C01G1/00 , C01G21/00 , C22C5/02 , C22C5/04 , C22C5/08 , C22C9/00 , C22F1/00 , C30B29/22 , H01L39/12
摘要： PURPOSE:To obtain the titled superlattice to be a superconductor for high temperature use and free from rare earth and alkaline earth metal elements, by forming, in a copper-silver-gold-palladium alloy having one-dimensional long- period structure, each atom pair of O and the above elements and forming each atom pair into long-period structure. CONSTITUTION:O atoms are infiltrated into the interstitial positions of Cu3Au, Cu3Pt, Ag3Mg, Ag3Cd, and Cu3Pd to be one-dimensional and two-dimensional long-period structures, by which each atom pair of Cu, Ag, Au, and Pd and O is formed. At this time, if an antiphase region exists in the superlattice, partial disorder occurs to the configuration of the atom pair, and so, it is preferable that an antiphase boundary is as short as possible and it is necessary to regulate the composition so that the antiphase boundary is as short as possible. By this method, a superconducting material of >=77K can be manufactured without the use of rare earth elements and alkaline earth elements, and further, the necessity of heat treatment at high temp. can be obviated.

107. 发明专利

JPS63138712A MAGNETIC MULTILAYER FILM 失效
公开(公告)号：JPS63138712A
公开(公告)日：1988-06-10
申请号：JP28433186
申请日：1986-12-01
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO , KOZONO YUZO , NARUSHIGE SHINJI , HANAZONO MASANOBU , KURODA TETSUO
IPC分类号： C23C14/00 , C23C14/24 , C23C14/58 , G11B5/127 , H01F10/14 , H01F10/32
摘要： PURPOSE:To enlarge an interatomic distance of Fe to increase saturation magnetization and magnetic permeability thereof, by alternately stacking layers of Fe and of a metal having a coefficient fo thermal expansion higher than that of Fe at a substrate temperature fo TM/2 or below and then rapidly heating the stacked body at a specific heating rate. CONSTITUTION:Layers of Fe and of a metal having a coefficient of thermal expansion higher than that of Fe are alternately stacked at a substrate temperature of TM/2 or below (TM: melting temperature). The stacked body is then heated rapidly at a heating rate of 200 deg.C/min. Said element having a coefficient of thermal expansion higher than that of Fe may be Ag, Al, Au, Cu, Co, In, Mg, Ni, Pb, Sn or Zn. If the substrate temperature is higher than TM/2, energy for activating mutual diffusion among atoms is decreased and lattice vibration is increased, whereby interfaces of the multi-layer film become unstable. The rapid heating enlarges lattices of the element having a higher coefficient of thermal expansion, and this acts on the ferromagnetic transistion metal as tension stress. Lattices of the ferromagnetic transistion metal are thereby enlarged and the saturation magnetization and magnetic permeability are improved.

108. 发明专利

JPS6379253A MAGNETO-OPTICAL MATERIAL 失效
公开(公告)号：JPS6379253A
公开(公告)日：1988-04-09
申请号：JP22361486
申请日：1986-09-24
申请人： HITACHI LTD
发明人： KOZONO YUZO , KOMURO MATAHIRO , NARUSHIGE SHINJI , HANAZONO MASANOBU
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To obtain a thin perpendicularly magnetized film having a large Kerr rotating angle by forming a thin film consisting of required elements by vapor deposition on a specific underlying film. CONSTITUTION:Any one of elements among IVa group, IV group, V group, etc., is deposited by vacuum evaporation on a substrate 1 to form the underlying film 2 having a required thickness. A thin PtMnSb film 3 is then formed when Pt, Mn and Sb are deposited by vacuum evaporation on said film while a magnetic field is kept impressed perpendicularly to the plane of the substrate 1 in succession thereto. Since the film 3 is provided with the underlying film 2, the crystallinity thereof is improved and the thin perpendicularly magnetized film having the large Kerr rotating angle is formed. A good-quality magneto- optical material is, therefore, obtd. if a protective film 4 is laminated thereon.

109. 发明专利

JPS62198141A MULTILAYER COOLING PLATE 失效
公开(公告)号：JPS62198141A
公开(公告)日：1987-09-01
申请号：JP3923186
申请日：1986-02-26
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO , KOZONO YUZO , KUDO KAZUE , NARUSHIGE SHINJI , KURODA TETSUO
IPC分类号： H01L23/473 , H01L21/48 , H05K1/05
摘要： PURPOSE:To provide high cooling capacity by emitting a laser to a multilayer film made of a light transmission oxide and 3d transition metal to form pores in the film. CONSTITUTION:After an SiO2 film is formed on a glass substrate, Ti, V, Cr, Mn, Co, Ni, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Au, Pt are sputtered to form an oxide-metal film. Oxide layers and metal layers are alternately sputtered on the oxide-metal film to form a multilayer film which contains 3 layers. Then, when an Ar laser is emitted perpendicularly to the surface of the multilayer film, the laser passes two oxide films, heat is concentrated by the laser in a metal layer 1. When the laser is moved, only the metal layer can be removed. When the laser is moved according to this system, cooling pores can be formed at arbitrary positions to obtain a high density cooling plate.

110. 发明专利

JP2003263704A MAGNETIC HEAD 审中-公开
公开(公告)号：JP2003263704A
公开(公告)日：2003-09-19
申请号：JP2003056511
申请日：2003-03-04
申请人： HITACHI LTD
发明人： NARUMI SHUNICHI , FUKUI HIROSHI , FUYAMA MORIAKI , KOMURO MATAHIRO
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To provide an inductive thin-film magnetic head wherein fluctuation or noise is small in a reproducing output during reproduction. SOLUTION: The inductive thin-film magnetic head is constructed in such a manner that the tips of lower and upper magnetic cores have widths equal to a track width, and the rear ends of the lower and upper magnetic cores are larger in width than the tips in a track width direction. The lower magnetic core is constituted of at least two magnetic layers through a nonmagnetic layer. COPYRIGHT: (C)2003,JPO

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