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21. 发明专利

JP2004280955A Magnetic storage device 审中-公开
公开(公告)号：JP2004280955A
公开(公告)日：2004-10-07
申请号：JP2003071270
申请日：2003-03-17
申请人： Hitachi Maxell Ltd , 日立マクセル株式会社
发明人： MATSUNUMA SATORU , KONUMA TAKESHI , YANO AKIRA , TAKAYAMA TAKANOBU
IPC分类号： G11B33/12 , G11B5/673 , G11B5/738 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a storage device which can keep a stable floating posture of a magnetic head at a high surface recording density of at least 600 giga bits/square inch and ensure long-term sliding-resistant characteristics.
SOLUTION: The magnetic storage device is provided with a disk-shaped magnetic recording medium of vertical magnetic recording type to which recording is made at the surface recording density of at least 600 giga bits/square inch; a magnetic head for recording and reproduction; a rotation means for moving the magnetic head and the magnetic recording medium relatively; a driving means for positioning the position of the magnetic head in a radius direction; and a housing which accommodates them. In addition, the housing is filled with a gas having an average molecular weight of 22 or below and then sealed. By this, the stable floating posture of the magnetic head is kept, and the long-term sliding-resistant characteristics are ensured.
COPYRIGHT: (C)2005,JPO&NCIPI

22. 发明专利

JP2004280942A Magnetic storage device 审中-公开
公开(公告)号：JP2004280942A
公开(公告)日：2004-10-07
申请号：JP2003070169
申请日：2003-03-14
申请人： Hitachi Maxell Ltd , 日立マクセル株式会社
发明人： MATSUNUMA SATORU , KONUMA TAKESHI , YANO AKIRA , FUJITA SHIOJI
IPC分类号： G11B33/12 , G11B5/012 , G11B5/667 , G11B5/673 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To provide a magnetic storage device in which a stable floating posture of a magnetic head is kept unchanged with a high surface recording density of ≥600 Gbits/square inch and a long term sliding resistance characteristic is ensured.
SOLUTION: The magnetic storage device comprises a disk-shaped magnetic recording medium of a vertical magnetic recording system recorded with the surface recording density of ≥600 Gbits/square inch, a magnetic head for performing recording and reproducing, a rotating means for relatively moving the magnetic head and the magnetic recording medium, a driving means for radially positioning the magnetic head, and a casing for accommodating them. In the magnetic storage device, the casing is filled with gas having average molecular weight of ≤22 and is sealed. Hereby, the stable floating posture of the magnetic head is kept unchanged to ensure the long term sliding resistance.
COPYRIGHT: (C)2005,JPO&NCIPI

23. 发明专利

JP2004227701A Vertical magnetic recording medium 审中-公开
公开(公告)号：JP2004227701A
公开(公告)日：2004-08-12
申请号：JP2003015526
申请日：2003-01-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NEMOTO HIROAKI , TAKEZUMI IKUKO , HOSOE YUZURU , NAKAGAWA HIROYUKI , IGARASHI KAZUSUKATSU
IPC分类号： G11B5/673 , G11B5/64 , G11B5/66 , G11B5/738 , G11B5/851 , H01F10/16 , H01F10/30 , H01F41/18
CPC分类号： G11B5/66 , G11B5/656 , G11B5/732
摘要： PROBLEM TO BE SOLVED: To provide a Co/Pd superlattice film or a Co/Pt superlattice film for obtaining the superior recording/reproducing performance in a wide temperature range in a magnetic recorder. SOLUTION: This medium is provided with a substrate and a magnetic layer formed on this substrate, and the magnetic layer is made to be the superlattice film which is the laminated body of a ferromagnetic metal layer containing Co and a nonmagnetic metal layer consisting of Pd and/or Pt, and the ferromagnetic metal layer contains further a nonmagnetic element, and the thickness of the nonmagnetic metal layer is made to be 0.8 nm or less. Also, when the torque curve of the vertical magnetic recording medium is measured by a torque meter, the polarity of a four-fold object component of the torque curve is preferably a code reverse to the polarity of a two-fold object component of the torque curve. Thus, the temperature dependency of the magnetic performance of the superlattice film is suppressed while the high quality of a recording/reproducing signal, then the high performance vertical magnetic recording medium is obtained. COPYRIGHT: (C)2004,JPO&NCIPI

24. 发明专利

JP2004213869A Vertical magnetic recording medium and its manufacturing method 有权
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：JP2004213869A
公开(公告)日：2004-07-29
申请号：JP2003418721
申请日：2003-12-16
申请人： Fuji Electric Device Technology Co Ltd , 富士電機デバイステクノロジー株式会社
发明人： OIKAWA TADAAKI , UWAZUMI HIROYUKI , SHIMAZU TAKEHITO , MURAOKA HIROAKI , NAKAMURA YOSHIHISA
IPC分类号： C23C14/14 , C23C14/35 , G11B5/65 , G11B5/673 , G11B5/73 , G11B5/738 , G11B5/84 , G11B5/851 , H01F10/16 , H01F41/18
摘要： PROBLEM TO BE SOLVED: To provide a method for forming, at lower temperature, a magnetic recording medium having a magnetic recording layer made of an L10 type ordered alloy having high magnetic anisotropy energy Ku required to attain both heat stability improvement and low noise.
SOLUTION: This vertical magnetic recording medium is configured by sequentially forming at least a non-magnetic underlayer on a non-magnetic substrate, a magnetic recording layer, a protective film and a liquid lubrication layer. The magnetic recording layer is formed by alternately laminating Fe or Co with film thickness between 0.1 and 0.3nm and Pt with film thickness between 0.15 and 0.35nm and is made of alloy made mainly of FePt or CoPt including an area being the L10 type ordered structure.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在较低温度下形成具有由具有高的磁各向异性能Ku的L10型有序合金制成的磁记录层的磁记录介质的方法，所述合金具有获得热稳定性提高和低噪声。解决方案：该垂直磁记录介质通过在非磁性基板，磁记录层，保护膜和液体润滑层上顺序地形成至少非磁性底层而构成。磁记录层通过交替层叠厚度在0.1和0.3nm之间的Fe或Co，膜厚度在0.15和0.35nm之间的Pt形成，并且由主要由FePt或CoPt制成的合金制成，其中包括L10型有序结构的区域。版权所有（C）2004，JPO＆NCIPI

25. 发明专利

JP2004185726A Magnetic recording medium and magnetic storage device using it 有权
标题翻译：磁记录介质和使用它的磁存储设备
公开(公告)号：JP2004185726A
公开(公告)日：2004-07-02
申请号：JP2002351973
申请日：2002-12-04
申请人： Hitachi Maxell Ltd , 日立マクセル株式会社
发明人： KONUMA TAKESHI , YANO AKIRA , MATSUNUMA SATORU , FUJITA SHIOJI
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/673 , G11B5/73
CPC分类号： G11B5/732 , G11B5/667
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has excellent thermal stability and is used for high density recording of low medium noise, and a magnetic storage device.
SOLUTION: A magnetic disk 100 is provided with a soft magnetic layer 3, a seed layer 4, and a recording layer 5 having artificial lattice structure. The soft magnetic layer 3 is formed for example of Co, B, and the seed layer 4 is formed for example of Pd, B. Magnetic exchange coupling force of the inplane direction acting among crystal particles of the recording layer 5 is reduced by this structure. Therefore, minute recording magnetic domains is formed in the recording layer 5, a magnetic transition region is made clear, and medium noise is reduced. That is, reproduction is performed with low medium noise even if information is recorded in high density. Since the recording layer 5 having the artificial lattice structure has high magnetic anisotropy, it is also excellent in thermal stability.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有优异的热稳定性并用于低介质噪声的高密度记录的磁记录介质和磁存储装置。解决方案：磁盘100设置有软磁层3，种子层4和具有人造晶格结构的记录层5。软磁性层3例如由Co，B形成，种子层4例如由Pd，B形成。作为记录层5的结晶粒子的面内方向的磁交换耦合力由于该结构而降低。因此，在记录层5中形成微小的记录磁畴，使磁性过渡区清晰，并且中等噪声降低。也就是说，即使以高密度记录信息，也以低的中等噪声进行再现。由于具有人造晶格结构的记录层5具有高的磁各向异性，所以其热稳定性也优异。版权所有（C）2004，JPO＆NCIPI

26. 发明专利

JPWO2002054390A1 磁気記録媒体及びその製造方法並びに磁気記憶装置有权
公开(公告)号：JPWO2002054390A1
公开(公告)日：2004-05-13
申请号：JP2002555406
申请日：2001-12-27
申请人：日立マクセル株式会社
发明人：松沼　悟 , 矢野　亮 , 小沼　剛 , 高山　孝信 , 日永田　晴美 , 若林　康一郎
IPC分类号： G11B5/738 , G11B5/00 , G11B5/012 , G11B5/65 , G11B5/66 , G11B5/667 , G11B5/673 , G11B5/74 , G11B5/84 , G11B5/851 , H01F10/16 , H01F10/187 , H01F10/30 , H01F41/18 , H01F41/20
CPC分类号： G11B5/00 , G11B5/012 , G11B5/66 , G11B5/74 , G11B5/851 , Y10S428/90 , Y10T428/12465 , Y10T428/12868 , Y10T428/265
摘要：磁気記録媒体700は、基板1上に軟磁性層73、第1シード層74、第2シード層75及び人工格子構造を有する記録層76を備える。第1シード層はFe酸化物を含む。第2シード層75はPd及びPtの一方とSiとNとを含む。かかる第1シード層74及び第2シード層75により、記録層76の面内方向の磁気的交換結合力は弱められる。これにより記録層76に微細な記録磁区が形成できるとともに磁化遷移領域も明瞭となり、情報再生時のノイズが低減する。すなわち、高密度に情報を記録しても低ノイズで再生できる。人工格子構造の記録層76は高い磁気異方性を有するので熱安定性に優れる。かかる磁気記録媒体を備える磁気記憶装置は150Gb/inch2の面記録密度を達成できる。

27. 发明专利

JP3507831B2 Magnetic recording medium and a method for manufacturing the same, and a magnetic storage device 有权
公开(公告)号：JP3507831B2
公开(公告)日：2004-03-15
申请号：JP2003271025
申请日：2003-07-04
申请人：日立マクセル株式会社
发明人：剛小沼 , 晴美日永田 , 悟松沼 , 亮矢野 , 康一郎若林 , 孝信高山
IPC分类号： G11B5/738 , G11B5/65 , G11B5/673 , G11B5/84 , G11B5/85 , G11B5/851

28. 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

29. 发明专利

JP3451079B2 Magnetic recording medium and a method for manufacturing the same, and a magnetic storage device 有权
公开(公告)号：JP3451079B2
公开(公告)日：2003-09-29
申请号：JP2001345099
申请日：2001-11-09
申请人：日立マクセル株式会社
发明人：晴美坂本 , 剛小沼 , 悟松沼 , 亮矢野 , 康一郎若林 , 孝信高山
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/673 , G11B5/84 , G11B5/851

30. 发明专利

JP2003263714A MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE 审中-公开
公开(公告)号：JP2003263714A
公开(公告)日：2003-09-19
申请号：JP2002060942
申请日：2002-03-06
申请人： FUJITSU LTD
发明人： OKAMOTO IWAO
IPC分类号： G11B5/64 , G11B5/66 , G11B5/673 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To improve heat stability without deteriorating resolution or NLTS regarding a magnetic recording medium and a magnetic storage device. SOLUTION: The magnetic recording medium is provided with a first magnetic layer having saturation magnetization Ms1 and a film thickness t1, a first nonmagnetic layer disposed on the first magnetic layer, a second magnetic layer having saturation magnetization Ms2 and a film thickness t2 and disposed on the first nonmagnetic layer, a second nonmagnetic layer disposed on the second magnetic layer, and a third magnetic layer having saturation magnetization Ms3 and a film thickness t3 and disposed on the second nonmagnetic layer. The magnetizations of the first, second and third magnetic layers are alternately connected in anti-parallel in the state of no external magnetic field application, and the relation of Ms2×t2 COPYRIGHT: (C)2003,JPO

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