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31. 发明授权

US06579613B1 Recording medium with limited using period 失效
标题翻译：记录介质使用期限有限
公开(公告)号：US06579613B1
公开(公告)日：2003-06-17
申请号：US09684432
申请日：2000-10-10
申请人： Hiroyuki Uwazumi , Teruhisa Yokosawa
发明人： Hiroyuki Uwazumi , Teruhisa Yokosawa
IPC分类号： G11B566
CPC分类号： G11B5/656 , G11B5/64 , Y10S428/90 , Y10T428/265
摘要： For protecting a copyright, stored digital information on a recording medium is attenuated in a certain period of time. For this purpose, the thickness of a magnetic layer and the diameter of magnetic crystal grain are changed to control the effect of the thermal oscillation on magnetization of a crystalline region to thereby provide the recording medium with digital information retained for a certain period of time, and attenuated along with time.
摘要翻译：为了保护版权，在一定的时间段内将存储的数字信息在记录介质上衰减。为此，改变了磁性层的厚度和磁晶粒的直径，以控制热振荡对结晶区域的磁化的影响，从而为记录介质提供一段时间内保留的数字信息，并随时间衰减。

32. 发明授权

US07622205B2 Disk substrate for a perpendicular magnetic recording medium and a perpendicular magnetic recording medium using the substrate 有权
标题翻译：用于垂直磁记录介质的磁盘基板和使用该基板的垂直磁记录介质
公开(公告)号：US07622205B2
公开(公告)日：2009-11-24
申请号：US11104274
申请日：2005-04-12
申请人： Hiroyuki Uwazumi , Youichi Tei , Kengo Kainuma , Kazuhito Higuchi , Akira Iso , Hajime Kurihara
发明人： Hiroyuki Uwazumi , Youichi Tei , Kengo Kainuma , Kazuhito Higuchi , Akira Iso , Hajime Kurihara
IPC分类号： G11B5/64 , G11B5/00 , G11B15/70
CPC分类号： G11B5/667 , G11B5/7315
摘要： A disk substrate for a perpendicular magnetic recording medium is, disclosed. The substrate exhibits sufficient productivity, serves the function of a soft magnetic backing layer of the perpendicular magnetic recording medium, and scarcely generates noise. A perpendicular magnetic recording medium using such a substrate also is disclosed. The disk substrate comprises at least a soft magnetic underlayer formed on a nonmagnetic base plate by means of an electroless plating method. The thermal expansion coefficient of the soft magnetic underlayer is larger than a thermal expansion coefficient of the nonmagnetic disk-shaped base plate. A saturation magnetostriction constant λs satisfies a relation λs≧−1×10−5.
摘要翻译：公开了一种用于垂直磁记录介质的盘基片。基板表现出足够的生产率，起到垂直磁记录介质的软磁背衬层的功能，并且几乎不产生噪声。还公开了使用这种基板的垂直磁记录介质。盘状基板通过无电镀法至少包含在非磁性基板上形成的软磁性底层。软磁性底层的热膨胀系数大于非磁性盘状基板的热膨胀系数。饱和磁致伸缩常数lambdas满足关系lambdas> = - 1×10-5。

33. 发明申请

US20050186358A1 Perpendicular magnetic recording medium and fabrication method thereof 失效
公开(公告)号：US20050186358A1
公开(公告)日：2005-08-25
申请号：US11115312
申请日：2005-04-27
申请人： Yasushi Sakai , Hiroyuki Uwazumi , Kazuo Enomoto , Sadayuki Watanabe
发明人： Yasushi Sakai , Hiroyuki Uwazumi , Kazuo Enomoto , Sadayuki Watanabe
IPC分类号： G11B5/65 , G11B5/66 , G11B5/667 , G11B5/738 , G11B5/851 , H01F1/00
CPC分类号： G11B5/66 , G11B5/851 , Y10S428/90 , Y10T428/12465 , Y10T428/12778 , Y10T428/12826 , Y10T428/12847 , Y10T428/12854 , Y10T428/12861 , Y10T428/12931 , Y10T428/24975 , Y10T428/265
摘要： A perpendicular magnetic recording medium and method thereof, includes a nonmagnetic substrate; a soft magnetic under layer; an intermediate layer; a bilayer magnetic recording layer; a protective layer; and a liquid lubricant layer. According to a following order, the soft magnetic under layer, the intermediate layer, the bilayer magnetic recording layer, the protective layer, and the liquid lubricant layer are sequentially stacked on the nonmagnetic substrate. The bilayer magnetic recording layer includes a first magnetic layer including a CoCr alloy crystalline film, and a second magnetic layer including a rare earth-transition metal alloy noncrystalline film.

34. 发明授权

US5723032A Magnetic recording medium and manufacturing method thereof 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US5723032A
公开(公告)日：1998-03-03
申请号：US560361
申请日：1995-11-17
申请人： Kiyoto Yamaguchi , Yukiko Mamiya , Atsushi Ueda , Hiroyuki Uwazumi
发明人： Kiyoto Yamaguchi , Yukiko Mamiya , Atsushi Ueda , Hiroyuki Uwazumi
IPC分类号： G11B5/65 , C09D5/23 , C23C14/18 , G11B5/64 , G11B5/73 , G11B5/738 , G11B5/84 , C23C14/34
CPC分类号： G11B5/7325 , C23C14/18 , G11B5/8404 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/12493 , Y10T428/12771 , Y10T428/12847 , Y10T428/12854 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium capable of making a high-density recording, with improved magnetic characteristics such as coercive force (Hc) and other factors, in which the flatness of the surface of a magnetic recording medium is maintained, and a method for the manufacture thereof are disclosed. By disposing a non-magnetic metal buffer layer 6 between a non-magnetic glass substrate 1 and a non-magnetic metal under layer 2 and keeping a ratio d.sub.1 /d.sub.2 of the half bandwidth of an X-ray diffraction peak of the metal buffer layer 6 and the metal under layer 2 predetermined values, a large increase in coercive force (Hc) can be obtained. In addition, by controlling the film thickness .delta. of the metal buffer layer 6 and the base substance temperature (T) when the metal buffer layer 6 is formed, magnetic characteristics such as squareness (S), coercive force squareness (S.sup.*), coercive force difference (.DELTA. HC) and coercive force squareness difference (.DELTA. S.sup.*) can be improved.
摘要翻译：一种能够进行高密度记录的磁记录介质，具有改善的磁特性如矫顽力（Hc）等因素，其中维持磁记录介质的表面的平坦度及其制造方法被披露。通过在非磁性玻璃基板1和非磁性金属层2之间配置非磁性金属缓冲层6，并保持金属缓冲层的X射线衍射峰的半值带宽的比率d1 / d2 6和金属层2的预定值，可以获得矫顽力（Hc）的大幅度增加。此外，通过在形成金属缓冲层6时控制金属缓冲层6的膜厚度delta和基体物质温度（T），可以使用诸如矩形度（S），矫顽力矩形度（S *），矫顽力力差（DELTA HC）和矫顽力矩差（DELTA S *）可以提高。

35. 发明授权

US5474830A Magnetic recording medium and method for the manufacture thereof including spaced apart deposits 失效
标题翻译：磁记录介质及其制造方法，包括间隔开的沉积物
公开(公告)号：US5474830A
公开(公告)日：1995-12-12
申请号：US99353
申请日：1993-07-30
申请人： Kiyoto Yamaguchi , Hiroyuki Uwazumi , Kenji Ozawa , Hisasi Yamasaki
发明人： Kiyoto Yamaguchi , Hiroyuki Uwazumi , Kenji Ozawa , Hisasi Yamasaki
IPC分类号： G11B5/72 , G11B5/64 , G11B5/73 , G11B5/738 , G11B5/84 , G11B5/85 , G11B5/851 , G11B5/66 , B32B9/04 , C23C14/32 , G11B5/70
CPC分类号： G11B5/7325 , G11B5/8404 , Y10S428/90 , Y10T428/12465 , Y10T428/12472 , Y10T428/12806 , Y10T428/12847 , Y10T428/12951 , Y10T428/24355 , Y10T428/24521
摘要： To improve the sliding characteristics of a magnetic head by reducing a friction coefficient, and realize a magnetic recording medium with a high recording density and a large capacity, capable of reducing the flotation distance of the magnetic head. On the surface of a base, aluminum containing nitrogen aggregates locally to form islands of metal deposits, which are distributed discretely over the entire surface of the base. Meanwhile, on the metal deposits, a metal base layer, a magnetic layer, a protective layer, and a lubrication layer are laminated sequentially to form a magnetic recording disk. On the disk surface, ultrafine irregularities are formed that reflect the shapes of the metal deposits, thereby realizing a reduction in the friction coefficient.
摘要翻译：通过降低摩擦系数来改善磁头的滑动特性，实现具有高记录密度和大容量的磁记录介质，能够降低磁头的浮选距离。在碱的表面上，含铝的氮聚集在一起形成金属沉积物岛，其分散在基底的整个表面上。同时，在金属沉积物上依次层叠金属基层，磁性层，保护层和润滑层，形成磁记录盘。在盘表面上形成反映金属沉积物形状的超微细凹凸，从而实现摩擦系数的降低。

36. 发明申请

US20100165509A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM 有权
标题翻译：全能磁记录介质
公开(公告)号：US20100165509A1
公开(公告)日：2010-07-01
申请号：US12595618
申请日：2008-04-11
申请人： Hiroyuki Uwazumi , Yasushi Sakai , Shunji Takenoiri
发明人： Hiroyuki Uwazumi , Yasushi Sakai , Shunji Takenoiri
IPC分类号： G11B5/82
CPC分类号： G11B5/7325 , G11B5/65
摘要： A perpendicular magnetic recording medium, which includes a nonmagnetic substrate, and a soft magnetic layer, a first orientation control layer, a nonmagnetic intermediate layer, and a perpendicular magnetic recording layer formed sequentially on the nonmagnetic substrate. The perpendicular magnetic recording medium further includes a second orientation control layer provided between the first orientation control layer and the nonmagnetic intermediate layer. The nonmagnetic intermediate layer has hexagonal close-packed (hcp) structure. The first orientation control layer has a face-centered cubic (fcc) structure. The second orientation control layer includes Co and Cr, and has the hcp structure.
摘要翻译：包括非磁性基板的垂直磁记录介质和顺序地形成在非磁性基板上的软磁性层，第一取向控制层，非磁性中间层和垂直磁记录层。垂直磁记录介质还包括设置在第一取向控制层和非磁性中间层之间的第二取向控制层。非磁性中间层具有六方密堆积（hcp）结构。第一取向控制层具有面心立方（fcc）结构。第二取向控制层包括Co和Cr，具有hcp结构。

37. 发明授权

US07635498B2 Fabrication method for perpendicular magnetic recording media 失效
标题翻译：垂直磁记录介质的制作方法
公开(公告)号：US07635498B2
公开(公告)日：2009-12-22
申请号：US11115312
申请日：2005-04-27
申请人： Yasushi Sakai , Hiroyuki Uwazumi , Kazuo Enomoto , Sadayuki Watanabe
发明人： Yasushi Sakai , Hiroyuki Uwazumi , Kazuo Enomoto , Sadayuki Watanabe
IPC分类号： B05D5/12 , H01F1/00 , G11B5/81 , G11B5/84
CPC分类号： G11B5/66 , G11B5/851 , Y10S428/90 , Y10T428/12465 , Y10T428/12778 , Y10T428/12826 , Y10T428/12847 , Y10T428/12854 , Y10T428/12861 , Y10T428/12931 , Y10T428/24975 , Y10T428/265
摘要： A perpendicular magnetic recording medium and method thereof, includes a nonmagnetic substrate; a soft magnetic under layer; an intermediate layer; a bilayer magnetic recording layer; a protective layer; and a liquid lubricant layer. According to a following order, the soft magnetic under layer, the intermediate layer, the bilayer magnetic recording layer, the protective layer, and the liquid lubricant layer are sequentially stacked on the nonmagnetic substrate. The bilayer magnetic recording layer includes a first magnetic layer including a CoCr alloy crystalline film, and a second magnetic layer including a rare earth-transition metal alloy noncrystalline film.
摘要翻译：一种垂直磁记录介质及其方法，包括非磁性基板; 软磁下层; 中间层双层磁记录层; 保护层; 和液体润滑剂层。根据以下顺序，将软磁性层，中间层，双层磁记录层，保护层和液体润滑剂层依次层叠在非磁性基板上。双层磁记录层包括具有CoCr合金结晶膜的第一磁性层和包括稀土 - 过渡金属合金非晶膜的第二磁性层。

38. 发明授权

US07361419B2 Substrate for a perpendicular magnetic recording medium, perpendicular magnetic recording medium, and manufacturing methods thereof 有权
标题翻译：用于垂直磁记录介质的基板，垂直磁记录介质及其制造方法
公开(公告)号：US07361419B2
公开(公告)日：2008-04-22
申请号：US10772082
申请日：2004-02-04
申请人： Hiroyuki Uwazumi , Yasushi Sakai , Mitsuo Masuda , Norihiko Nakajima
发明人： Hiroyuki Uwazumi , Yasushi Sakai , Mitsuo Masuda , Norihiko Nakajima
IPC分类号： G11B5/66
CPC分类号： G11B5/8404 , G11B5/4555 , G11B5/667 , G11B5/82 , G11B5/858
摘要： A substrate for a perpendicular magnetic recording medium has a soft magnetic underlayer that functions as a soft magnetic backing layer of a perpendicular magnetic recording medium. The substrate for a perpendicular magnetic recording medium has a nonmagnetic base made of Al—Mg alloy or the like. The soft magnetic underlayer is formed of a Ni—P alloy containing phosphorus in a range of 0.5 wt % to 6 wt % formed by electroless plating on the nonmagnetic base. The substrate can also include a nonmagnetic underlayer formed by electroless plating on the base before electroless plating the soft magnetic underlayer. To form the perpendicular magnetic recording medium, the surface of the soft magnetic is textured using free abrasive grains. Thereafter, a nonmagnetic seed layer, a magnetic recording layer, and a protective layer can be formed by sputtering. A soft magnetic supplemental layer also can be formed on the soft magnetic underlayer before forming the seed layer.
摘要翻译：用于垂直磁记录介质的基板具有用作垂直磁记录介质的软磁背衬层的软磁性底层。用于垂直磁记录介质的基板具有由Al-Mg合金等制成的非磁性基体。软磁性底层由非磁性基底上通过化学镀形成的含有0.5重量％〜6重量％的磷的Ni-P合金形成。基板还可以包括在对软磁性底层进行无电解电镀之前在基底上通过无电镀形成的非磁性底层。为了形成垂直的磁记录介质，软磁表面使用自由的磨粒纹理。此后，可以通过溅射形成非磁性种子层，磁记录层和保护层。在形成种子层之前，也可以在软磁性底层上形成软磁性辅助层。

39. 发明申请

US20060147760A1 Perpendicular magnetic recording medium 审中-公开
标题翻译：垂直磁记录介质
公开(公告)号：US20060147760A1
公开(公告)日：2006-07-06
申请号：US11293875
申请日：2005-12-02
申请人： Hiroyuki Uwazumi , Yasushi Sakai , Shunji Takenoiri , Sadayuki Watanabe
发明人： Hiroyuki Uwazumi , Yasushi Sakai , Shunji Takenoiri , Sadayuki Watanabe
IPC分类号： G11B5/66
CPC分类号： G11B5/667 , G11B5/7325
摘要： A perpendicular magnetic recording medium is provided that achieves excellent magnetic performance by suppressing spike noises due to a soft magnetic backing layer, as well as good productivity. The perpendicular magnetic recording medium comprises at least a soft magnetic backing layer, an antiferromagnetic layer, an nonmagnetic underlayer, and a magnetic recording layer sequentially laminated on a nonmagnetic substrate, wherein the magnetic recording layer has a granular structure, the nonmagnetic underlayer is composed of ruthenium or a ruthenium alloy having an hcp structure having a thickness of at least 5 nm, the antiferromagnetic layer is composed of an alloy having an fcc structure and containing at least manganese, and the antiferromagnetic layer is laminated directly on the soft magnetic backing layer. Preferably, the antiferromagnetic layer is composed of an IrMn alloy, and the soft magnetic backing layer has an fcc structure and contains at least nickel and iron. Advantageously, the soft magnetic backing layer consists of two or more directly laminated soft magnetic layers, and a distance between a top surface of the soft magnetic backing layer and a bottom surface of the magnetic recording layer is at most 25 nm.
摘要翻译：提供一种垂直磁记录介质，其通过抑制由于软磁背衬层引起的尖峰噪声以及良好的生产率而实现优异的磁性能。垂直磁记录介质至少包括软磁背衬层，反铁磁层，非磁性底层和依次层压在非磁性基板上的磁记录层，其中磁记录层具有颗粒结构，非磁性底层由钌或具有厚度至少为5nm的hcp结构的钌合金，反铁磁层由具有fcc结构并至少含有锰的合金构成，反铁磁层直接层压在软磁性背衬层上。优选地，反铁磁层由IrMn合金构成，并且软磁背衬层具有fcc结构并且至少包含镍和铁。有利地，软磁背衬层由两个或更多个直接层压的软磁性层组成，并且软磁背衬层的顶表面与磁记录层的底表面之间的距离至多为25nm。

40. 发明申请

US20050153169A1 Perpendicular magnetic recording medium and a method for manufacturing the same 有权
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：US20050153169A1
公开(公告)日：2005-07-14
申请号：US10867568
申请日：2004-06-14
申请人： Sadayuki Watanabe , Yasushi Sakai , Hiroyuki Uwazumi
发明人： Sadayuki Watanabe , Yasushi Sakai , Hiroyuki Uwazumi
IPC分类号： G11B5/64 , G11B5/65 , G11B5/66 , G11B5/667 , G11B5/73 , G11B5/738 , G11B5/84 , G11B5/851 , G11B5/68
CPC分类号： G11B5/732 , G11B5/65 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/7325 , G11B5/84 , G11B5/851
摘要： A perpendicular magnetic recording medium has a magnetic recording layer and laminated magnetic layers composed of different materials. In a first magnetic layer of the magnetic recording layer, ferromagnetic grains are surrounded by a nonmagnetic grain boundary region composed principally of oxide and/or nitride. In a second magnetic layer of the magnetic recording layer, ferromagnetic grains are surrounded by a nonmagnetic grain boundary region composed principally of chromium. The recording medium has an intermediate layer composed of a material having hcp or fcc structure. Advantageously, a heating process is conducted after forming the first magnetic layer and before forming the second magnetic layer. The medium achieves improvement in electromagnetic conversion characteristics and simultaneously improvement in corrosion resistance to provide a perpendicular magnetic recording medium with high recording density and simultaneously high reliability.
摘要翻译：垂直磁记录介质具有由不同材料组成的磁记录层和层叠磁性层。在磁记录层的第一磁性层中，铁磁颗粒被主要由氧化物和/或氮化物组成的非磁性晶界区包围。在磁记录层的第二磁性层中，铁磁颗粒被主要由铬组成的非磁性晶界区包围。记录介质具有由具有hcp或fcc结构的材料构成的中间层。有利地，在形成第一磁性层之后并在形成第二磁性层之前进行加热过程。该介质实现了电磁转换特性的提高，同时提高了耐腐蚀性，提供了具有高记录密度和同时高可靠性的垂直磁记录介质。

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