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1. 发明专利

JP2004014014A Vertical magnetic recording medium 有权
公开(公告)号：JP2004014014A
公开(公告)日：2004-01-15
申请号：JP2002166191
申请日：2002-06-06
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： TAKENOIRI SHUNJI , SAKAI YASUSHI
IPC分类号： G11B5/667 , G11B5/64 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To provide a vertical magnetic recording medium reduced in medium noise and improved in reproduced output characteristics by improving the orientability of a magnetic recording layer, reducing the crystal grain size of the magnetic recording layer and improving the coercive force of the magnetic recording layer.
SOLUTION: The vertical recording medium successively having a ground surface layer and the magnetic recording layer on a nonmagnetic substrate is formed with the ground surface layer including a "Permalloy" material selected from the group consisting of NiFeB, NiFeNbB, NiFeMoB, NiFeCrB, and NiFeNbMoB having soft magnetism and is provided with an intermediate layer preferably including pure Ru or an Ru-base alloy added with at least one kind selected from the group consisting of C, Cu, W, Mo, Cr, Ir, Pt, Re, Rh, Ta, and V to Ru between the ground surface layer and the magnetic recording layer, by which the vertical magnetic recording medium is obtained.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2004079043A Perpendicular magnetic recording medium 审中-公开
公开(公告)号：JP2004079043A
公开(公告)日：2004-03-11
申请号：JP2002235777
申请日：2002-08-13
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： UWAZUMI HIROYUKI , SAKAI YASUSHI , TAKENOIRI SHUNJI , SHIMAZU TAKEHITO , MURAOKA HIROAKI , NAKAMURA YOSHIHISA
IPC分类号： G11B5/667 , G11B5/673 , G11B5/73 , G11B5/738
CPC分类号： G11B5/667
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium having an excellent spike noise suppression effect.
SOLUTION: A soft magnetic lining layer is formed in a three or five-layer stacked structure in which a nonmagnetic metal layer made of a metal selected from Cu, Ru, Rh, Pd, Re, Os, Ir, Pt, Au or an alloy thereof, and having a film thickness of 5 nm or more, and a soft magnetic layer having a film thickness of 10 nm or higher so that uppermost and lowermost layers become soft magnetic layers, and magnetization directions are set parallel to a film surface so that the magetization directions of the upper and lower soft magnetic layers sandwiching the nonmagnetic metal layer are different from each other by 180°, whereby mutual antiferromagnetic coupling is realized. Thus, no magnetic wall is formed against a magnetic field applied from the outside and, as a result, a soft magnetic lining layer in which no spike noise is generated is formed.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2006302426A Perpendicular magnetic recording medium and its manufacturing method 审中-公开
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：JP2006302426A
公开(公告)日：2006-11-02
申请号：JP2005123781
申请日：2005-04-21
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： TAKENOIRI SHUNJI , SAKAI YASUSHI
IPC分类号： G11B5/65 , G11B5/667 , G11B5/738 , G11B5/851 , H01F10/16 , H01F41/18
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium compatibly attaining thermal stability and reduction of a magnetic cluster size.
SOLUTION: In the perpendicular magnetic recording medium provided with a non-magnetic substrate, a non-magnetic intermediate layer and a magnetic recording layer in this order, the magnetic recording layer has a granular structure containing Co, Cr, Pt, Si and O, the diameter of magnetic crystal grains is substantially fixed in the film thickness direction and a region on the interface side between the non-magnetic intermediate layer and the magnetic recording layer has an oxygen content more than that of a region on the surface side of the magnetic recording medium. Preferably, a soft magnetic backing layer and an underlayer are further provided and the underlayer contains Ni and Fe and has a crystal structure comprising a face-centered cubic lattice and soft magnetism.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供兼容地获得热稳定性和减小磁簇大小的垂直磁记录介质。解决方案：在具有非磁性衬底，非磁性中间层和磁记录层的垂直磁记录介质中，磁记录层具有含有Co，Cr，Pt，Si 和O，磁性晶粒的直径在膜厚度方向上基本固定，非磁性中间层和磁记录层之间的界面侧的区域的氧含量比表面侧的区域大的磁记录介质。优选地，还提供软磁背衬层和底层，并且底层包含Ni和Fe，并且具有包括面心立方晶格和软磁性的晶体结构。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2004288348A Perpendicular magnetic recording medium and method of manufacturing the same 有权
公开(公告)号：JP2004288348A
公开(公告)日：2004-10-14
申请号：JP2003331867
申请日：2003-09-24
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： TAKENOIRI SHUNJI , SAKAI YASUSHI
IPC分类号： G11B5/667 , G11B5/65 , G11B5/66 , G11B5/738 , G11B5/851
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium by which the coercive force of a magnetic recording layer is increased; the squareness ratio of the medium is enhanced; and the coating thickness of Ru or an Ru group alloy being a non-magnetic intermediate layer is reduced.
SOLUTION: The perpendicular magnetic recording layer is composed of: a non-magnetic substrate 1, a soft magnetic lining layer 2 provided on the non-magnetic substrate 1; a soft magnetic permalloy-based underlayer 3; a Co layer or a Co group alloy layer 4; an Ru or Ru group alloy intermediate layer 5; a magnetic recording layer 6; a protective film 7; and a liquid lubricant layer 8. The underlayer 3 is made of a permalloy-based material having soft magnetism. The Co layer or the Co group alloy layer 4 uses a soft magnetic material consisting of an alloy formed by adding one kind or more of materials selected from B, Al, Zr, Mg, and Si to pure Co, CoFe, or Co or CoFe. The soft magnetic Co layer or Co group alloy layer 4 is inserted between the underlayer 3 made of the soft magnetic permalloy-based material and the intermediate layer 5 made of an Ru or Ru group alloy material. Thus, the coercive force of the magnetic recording layer 6 is increased to enhance the squareness ratio of the medium.
COPYRIGHT: (C)2005,JPO&NCIPI

5. 发明专利

JP2004039082A Perpendicular magnetic recording medium and its manufacturing method, patterned medium and its manufacturing method 审中-公开
公开(公告)号：JP2004039082A
公开(公告)日：2004-02-05
申请号：JP2002193904
申请日：2002-07-02
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： TAKENOIRI SHUNJI , SAKAI YASUSHI
IPC分类号： G11B5/64 , G11B5/65 , G11B5/72 , G11B5/84 , H01F10/13 , H01F41/34
摘要： PROBLEM TO BE SOLVED: To improve corrosionproofness and recording resolution, increase the life and realize high density recording without loosing thermal stability regarding a perpendicular magnetic recording medium and its manufacturing method, and a patterned medium and its manufacturing method.
SOLUTION: The perpendicular magnetic recording medium is made by laminating a soft magnetic lining 2, a base layer 3, a magnetic recording layer 4, a nonmagnetic overcoat layer 5, a protective film 6, and a liquid lubricating later 7 in this order on a nonmagnetic base 1. The magnetic recording layer 4 is made of a rare earth-transition metal amorphous film. The nonmagnetic overcoat layer 5 consists of a metal selected from a group of Si, Ti, Ta, Cr, Mn, Mo and an alloy of two or more of them selected from this group.
COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2004022082A Vertical magnetic recording medium and its manufacturing method 有权
公开(公告)号：JP2004022082A
公开(公告)日：2004-01-22
申请号：JP2002176327
申请日：2002-06-17
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： TAKENOIRI SHUNJI , SAKAI YASUSHI
IPC分类号： G11B5/65 , G11B5/667 , G11B5/738 , G11B5/851 , H01F10/16 , H01F10/28 , H01F10/30 , H01F41/18
摘要： PROBLEM TO BE SOLVED: To realize high thermal stability, noise reduction, and cost reduction in a vertical magnetic recording medium and its manufacturing method.
SOLUTION: A soft porcelain backing layer 2, a foundation layer 3, a non-magnetic intermediate layer 4, a magnetic recording layer 5, a protection film 6, and a liquid lubricating layer 7 are formed successively on a non-magnetic substrate 1. A foundation layer 3 is filmed by using permalloy group material, the non-magnetic intermediate layer 4 is filmed by using Ru or Ru radical alloy material. The magnetic recording layer 5 is filmed using granular material in which B
4 C is added to a magnetic material in an original material, but at the time, filming is performed in the normal temperature in which temperature of the non-magnetic substrate 1 is almost room temperature.
COPYRIGHT: (C)2004,JPO

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