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公开(公告)号：WO1996037885A1
公开(公告)日：1996-11-28
申请号：PCT/EP1995002023
申请日：1995-05-26
Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION , BANDARA, Upali , BRUNSCH, Arved , ELSNER, Gerhard
IPC: G11B05/64
CPC classification number: G11B5/7325 , G11B5/8404
Abstract: A disk for vertical magnetic data recording, in which the writing/reading processes are carried out in a direction perpendicular to the disk surface and which may be directly contacted by a write/reading head, consists of a substrate (1) made of monocrystalline silicon whose surface (6) forms a layer of porous silicon (2). The layer of porous silicon (2) contains pores (3) that are substantially perpendicular to the surface (6) of the substrate (1) and are filled with a magnetisable material (4). In order to produce such a disk, the following steps are required: producing a substrate made of monocrystalline silicon, producing a layer of porous silicon at the surface of the substrate with pores that are substantially perpendicular to the surface of the substrate and filling the pores with a magnetisable material. With this disk, the write/reading head may directly contact the silicon substrate surface without adhering in its resting state to the porous surface of the disk, and may slide over said surface without causing abrasion phenomena that could affect the reliability of individual recording disks and of the recording disk system as a whole.
Abstract translation: 用于垂直磁性数据存储在读/写操作被执行垂直于板表面且由一读/写头直接接触，该板由基板（1）的单晶硅，其表面（6）的多孔层的 形成硅（2）。 多孔硅（2）的层基本上不包含垂直于（6）的基板（1）的有可磁化材料（4）延伸的孔（3）中填充表面上。 为了生产这种板在基片的表面上提供的单晶硅衬底，形成多孔硅层的步骤基本上需要垂直于衬底延伸孔的表面，并用可磁化的材料填充该孔。 在这样的磁盘读/写头能够与硅衬底表面直接接触，而没有在板中并滑动到它们而不磨损的孔表面在静止粘附可能出现的影响的每个磁盘的可靠性，和盘系统作为一个整体 ，
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2.发明申请PREPARATION OF THIN LAYERS OF IRON III OXIDE FOR OPTICAL AND/OR MAGNETIC RECORDING 审中-公开用于光学和/或磁性记录的铁III氧化物薄层的制备
公开(公告)号：WO1989003110A1
公开(公告)日：1989-04-06
申请号：PCT/EP1988000876
申请日：1988-09-26
Applicant: KODAK-PATHE , EASTMAN KODAK COMPANY , LE CARS, Yves , LURIN, Christian
Inventor： KODAK-PATHE , EASTMAN KODAK COMPANY
IPC: G11B05/64
Abstract: The present invention relates to a method for preparing thin layers of iron oxide. This method consists in coating on a support a composition of iron oxide polymer prepared by controlled hydrolysis of a solution of iron alkoxide. The hydrolysis is controlled by using an amount of water such that water/alkoxide molar ratio, R, ranges from 3 to 15 or from 60 to 80. The invention applies to the preparation of thin layers for optical and/or magnetic recording.
Abstract translation: 本发明涉及一种制备氧化铁III薄层的方法。 该方法包括在载体上涂覆通过控制水解铁醇盐溶液制备的氧化铁聚合物的组合物。 通过使用一定量的水来控制水解，使得水/醇盐摩尔比R为3至15或60至80.范围内。本发明适用于制备用于光学和/或磁记录的薄层。
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公开(公告)号：WO1987007422A1
公开(公告)日：1987-12-03
申请号：PCT/JP1987000347
申请日：1987-05-29
Applicant: SUMITOMO METAL MINING CO., LTD. , YONEYAMA, Yukinobu , NATE, Tatsuo , YOROZU, Takehiko , KAWAMOTO, Atsushi , ITO, Mikihiko
Inventor： SUMITOMO METAL MINING CO., LTD.
IPC: G11B05/64
CPC classification number: G11B11/10586 , G11B5/64
Abstract: A magneto-optical disk which has superposed on a transparent substrate three films, i.e. a film of magneto-optical recording medium, an interference film formed on one side of the film, and a protective film formed on the other side of tne film, is enabled to acquire notably high magneto-optical recording and reproducing properties and long durability by forming the interference film with a composition of AOx, LiAOy, or BizDOu (wherein A stands for at least one member selected from the group consisting of Ta and Nb, D for at least one member selected from the group consisting of Ge, Si, Ti, Pb, Zn, Al, and B, and x, y, z, and u stand for numerical values respectively satisfying the formulas 1.5
Abstract translation: 叠层在透明基板上的磁光盘是三层膜，即磁光记录介质的膜，形成在膜一侧的干涉膜，以及形成在膜的另一侧的保护膜，是 通过用AOx，LiAOy或BizDOu的组成形成干涉膜，能够获得显着高的磁光记录和再现性能和长的耐久性（其中A表示选自Ta和Nb，D中的至少一种 对于选自Ge，Si，Ti，Pb，Zn，Al和B中的至少一种，x，y，z和u分别表示分别满足式1.5的数值。 ，1.5
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公开(公告)号：WO1995028703A1
公开(公告)日：1995-10-26
申请号：PCT/US1995004325
申请日：1995-04-18
IPC: G11B05/64
CPC classification number: G11B5/8404 , G11B5/7315
Abstract: This invention relates to a disk substrate for use in a disk drive, the disk substrate consisting essentially of partially stabilized zirconia and having a surface roughness (Ra) of no more than 10 angstroms.
Abstract translation: 本发明涉及一种用于磁盘驱动器的磁盘基片，该磁盘基片主要由部分稳定的氧化锆组成，表面粗糙度（Ra）不超过10埃。
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5.发明申请PREPARATION OF THIN LAYERS OF IRON III OXIDE FOR OPTICAL AND/OR MAGNETIC RECORDING 审中-公开用于光学和/或磁性记录的铁III氧化物薄层的制备
公开(公告)号：WO1989003111A1
公开(公告)日：1989-04-06
申请号：PCT/EP1988000877
申请日：1988-09-26
Applicant: KODAK-PATHE , EASTMAN KODAK COMPANY , COT, Louis; , GUIZARD, Christian; , LARBOT, André; , LURIN, Christian , ROUVIERE, Jacques;
Inventor： KODAK-PATHE , EASTMAN KODAK COMPANY
IPC: G11B05/64
Abstract: The present invention relates to a method for preparing thin layers of iron oxide. This method consists in coating on a support a composition of iron oxide polymer prepared by controlled hydrolysis of a solution of iron alkoxide. The hydrolysis is controlled by progressively releasing water in a solution of iron alkoxide in a hydrophobic solvent, from reverse micelles comprising water and a surfactant. The invention applies to the preparation of thin layers for optical and/or magnetic recording.
Abstract translation: 本发明涉及一种制备氧化铁III薄层的方法。 该方法包括在载体上涂覆通过控制水解铁醇盐溶液制备的氧化铁聚合物的组合物。 水解是通过在疏水溶剂中的烷氧化铁溶液中逐渐释放水，由包含水和表面活性剂的反胶束来控制的。 本发明适用于制备用于光学和/或磁记录的薄层。
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Patent Agency Ranking6.发明申请
公开(公告)号：WO1997042628A1
公开(公告)日：1997-11-13
申请号：PCT/US1996006829
申请日：1996-05-09
Applicant: SEAGATE TECHNOLOGY, INC. , XUAN, Jialuo, Jack , CHEN, Ga-Lane
Inventor： SEAGATE TECHNOLOGY, INC.
IPC: G11B05/64
CPC classification number: G11B5/7315 , G11B5/7325 , G11B5/8404
Abstract: A magnetic recording medium is textured with a pulsed laser light beam through a multiple lens focusing system. The use of a multiple lens focusing system enables the formation of a plurality of relatively uniform protrusions smaller than those obtained with a single lens focusing system, thereby avoiding abrupt local profile changes. In an embodiment, the laser light beam is split, as by offsetting the lenses, to obtain a plurality of pairs of even smaller protrusions than obtained with a laser light beam having a centralized energy profile. The pulsed, multiple lens focused laser light beam can be used to texture a substrate, underlayer or magnetic layer. The resulting laser textured magnetic recording medium exhibits improved flying stability, glide performance and reliability.
Abstract translation: 磁记录介质通过多透镜聚焦系统用脉冲激光束纹理化。 使用多重透镜聚焦系统能够形成比用单个透镜聚焦系统获得的那些更小的多个相对均匀的凸起，从而避免突然的局部轮廓变化。 在一个实施例中，通过偏移透镜来激光束被分裂，以获得与具有集中能量分布的激光束获得的多对甚至更小的突起。 脉冲多透镜聚焦激光束可用于纹理衬底，底层或磁性层。 所得到的激光纹理磁记录介质具有改进的飞行稳定性，滑动性能和可靠性。
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公开(公告)号：WO1988002167A1
公开(公告)日：1988-03-24
申请号：PCT/US1987002390
申请日：1987-09-18
Applicant: UNISYS CORPORATION
Inventor： UNISYS CORPORATION , HERTE, Lawrence , VAN DE PITTE, Steven , BARAL, Debasis , LEE, Hyung, Jai
IPC: G11B05/64
CPC classification number: G11B5/64
Abstract: A chromium underlayer is provided under Co-Ni films used for magnetic recording; for "high Hc" and "good squareness", a Cr thickness of about 1000 A DEG or more is preferred with 400 A DEG - 5000 A DEG Co-20 Ni. The thickness of the Cr layer is selected to obtain a coercivity that provides both high recording density (small PW-50) and acceptable overwrite. The techniques described here show that an adjustment of the epi-orientation influence of a chromium underlayer can yield a thin cobalt-nickel magnetic film of moderate Hc and so accommodate a recording medium having high magnetic recording density and satisfactory overwrite capability.
Abstract translation: 在用于磁记录的Co-Ni膜下面提供铬底层; 对于“高Hc”和“好矩形度”，优选400A〜5000A℃Co-20Ni的约1000A℃以上的Cr厚度。 选择Cr层的厚度以获得提供高记录密度（小PW-50）和可接受覆盖的矫顽力。 这里描述的技术表明，铬底层的外延取向影响的调整可以产生中等Hc的薄钴镍磁性膜，因此容纳具有高磁记录密度和令人满意的覆盖能力的记录介质。
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8.发明公开
公开(公告)号：EP0220597A3
公开(公告)日：1988-07-06
申请号：EP86114203
申请日：1986-10-14
Applicant: International Business Machines Corporation
Inventor： Howard, James Kent
CPC classification number: G11B5/7325 , G11B5/64 , Y10S428/928 , Y10T428/12465 , Y10T428/12812 , Y10T428/12854 , Y10T428/12931
Abstract: The present invention relates to a magnetic recording medium for vertical recording of the type comprising a substrate (1), an intermediate layer (2) formed on the substrate and a magnetisable layer (3) formed on the intermediate layer. A medium according to the invention is characterised in that
the intermediate layer (2) comprises a first constituent of an element selected from the group consisting of tungsten (W), molybdenum (Mo), niobium (Nb), titanium (Ti), vanadium (V), iridium (Ir) and zirconium (Zr), and a second constituent consisting of either cobalt (Co), chromium (Cr), or a solid substitutional solution alloy of CoCr, wherein the amounts of the first and second constituents are present in a fixed stoichometric ratio so as to form an intermetallic compound with a hexagonal crystalline structure, and
the magnetisable layer (3) comprises a ternary alloy of the form (Co 100-y Cr y )X, wherein y is approximately in the range of 14 to 22 and wherein X is selected from the group consisting of W, Mo, Nb, Ti and V, and has an hexagonal crystalline structure with its C-axis oriented generally perpendicular to said substrate (1). The hexagonal cell constants of the intermediate layer (2) and the magnetisable layer (3) are related by approximately integral multiples whereby the hexagonal crystalline orientation of the magnetisable layer (3) is enhanced.-
公开(公告)号：EP0182287A3
公开(公告)日：1987-10-07
申请号：EP85114473
申请日：1985-11-14
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Nakamura, Hiroki c/o K.K. Toshiba , Yamada, Takashi c/o K.K. Toshiba , Ouchi, Yoshiaki c/o K.K. Toshiba
IPC: G11B05/64 , G11B05/704
CPC classification number: G11B5/73 , Y10T428/31681 , Y10T428/31688 , Y10T428/31721 , Y10T428/31725
Abstract: There are disclosed a perpendicular magnetic recording medium comprising a substrate of a polymer film containing 0.7% by weight or less of a residual solvent and a ferromagnetic alloy layer formed on the substrate and a method for preparing the same comprising the steps of heating a substrate composed of a polymer film containing a residual solvent in order to regulate a content of the solvent existing in the substrate to 0.7% by weight or less; and afterward forming a magnetic layer composed of a ferromagnetic alloy on the substrate. The perpendicular magnetic recording medium of the present invention has a prolonged durability and heightened reliability.
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公开(公告)号：EP0048456A3
公开(公告)日：1983-01-05
申请号：EP81107368
申请日：1981-09-17
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Koike, Yoshiyasu , Kubo, Osamu , Ido, Tadashi , Uwaha, Masanobu
CPC classification number: G11B5/70678
Abstract: A process for manufacturing a hexagonal ferrite magnetic powder for a magnetic recording medium involves rapidly cooling a molten material of a glass-forming component and a hexagonal ferrite-forming component to obtain glass flakes, heating the glass flakes to precipitate ferrite fine grains, incompletely dissolving the glass flakes with an acid or boiling water, and separating and recovering the fine grains in the presence of a dispersing agent.
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