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31.发明授权公开(公告)号：US07854807B2
公开(公告)日：2010-12-21
申请号：US11727482
申请日：2007-03-27
CPC分类号： H01F1/065 , G11B5/70615 , G11B5/70621 , G11B5/714 , H01F1/0054 , H01F1/061 , H01F1/09 , Y10T428/2991
摘要： A metal magnetic powder for a magnetic recording medium is provided whose particles have a metal magnetic phase, composed mainly of Fe or Fe plus Co, and an oxide layer, wherein the average major axis length of the powder particles is 10-50 nm, the average particle volume including the oxide layer is 5,000 nm3 or less, the atomic ratio (R+Al+Si)/(Fe+Co) calculated using the content values (at. %) of the elements contained in the powder particles is 20% or less, where R is rare earth element (Y being treated as a rare earth element). The metal magnetic powder is obtained by using a complexing agent and a reducing agent to elute nonmagnetic constituents after firing. The metal magnetic powder exhibits a large saturation magnetization σs for its particle volume while maintaining weatherability comparable to the conventional level and is suitable for a coated-type magnetic recording medium.
摘要翻译： 提供一种用于磁记录介质的金属磁粉，其颗粒具有主要由Fe或Fe + Co组成的金属磁性相和氧化物层，其中粉末颗粒的平均长轴长度为10-50nm， 包含氧化物层的平均粒子体积为5000nm 3以下，使用粉末颗粒中所含的成分的含量值（at。％）计算出的原子比（R + Al + Si）/（Fe + Co）为20％ 或更少，其中R是稀土元素（Y被当作稀土元素处理）。 通过使用络合剂和还原剂在烧制后洗脱非磁性成分得到金属磁性粉末。 金属磁性粉末对于其颗粒体积具有大的饱和磁化强度，同时保持与常规水平相当的耐候性，并且适用于涂覆型磁记录介质。
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公开(公告)号：US20050280934A1
公开(公告)日：2005-12-22
申请号：US10867743
申请日：2004-06-16
申请人： Masatoshi Nakayama
发明人： Masatoshi Nakayama
CPC分类号： G11B5/127 , G11B5/187 , Y10T428/1164
摘要： A thin-film head is provided wherein a protective film is formed on at least the surface facing a recording medium, said protective film containing Si, C and H in amounts of 3-9 at %, 61-81 at % and 16-30 at %, respectively, having a film thickness of 1-3 nm and having a refractive index of 2.0 or more. The resultant film has excellent coherence to the components of the thin-film head, rendering excellent durability to the head. Also, a method is provided for producing the thin-film head in which a thinner film can be obtained with less production steps and lower costs.
摘要翻译： 提供一种薄膜头，其中在至少面向记录介质的表面上形成保护膜，所述保护膜含有3-9原子％，61-81原子％和16-30重量％的Si，C和H at％，其膜厚为1-3nm，折射率为2.0以上。 所得膜对薄膜头部的组分具有优异的相干性，对头部具有优异的耐久性。 此外，提供了一种生产薄膜头的方法，其中可以以较少的生产步骤和较低的成本获得更薄的膜。
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公开(公告)号：US06385436B1
公开(公告)日：2002-05-07
申请号：US09429081
申请日：1999-10-29
IPC分类号： H04Q720
CPC分类号： H03F1/3229 , H03F1/3223 , H03F3/24 , H04B2001/0441
摘要： Conventional distortion compensation circuits have addressed the problem that their distortion compensation amount is greatly reduced at levels other than the designed power level. The present invention provides a distortion compensation circuit that comprises: a vector adjuster; a linearizer; a linear signal extraction path for extracting part of an input signal from the input side of the vector adjuster; a nonlinear signal extraction path for extracting part of an output signal from the output side of the amplifier; a level detector for detecting a combined power level of the signals from the linear signal extraction path and the nonlinear signal extraction path; and a control circuit for adjusting a bias of the linearizer in accordance with the detected combined power level, electrically adjusting the linearizer so that the power detected by the level detector is minimized, and adjusting the vector adjuster so that the power detected by the level detector is minimized every time the linearizer is adjusted. As a result, the distortion compensation circuit of the present invention can optimize distortion compensation at all times independently of the average power changes of the input signal, the secular changes of the amplifier and the state changes of the amplifier caused by temperature changes.
摘要翻译： 传统的失真补偿电路已经解决了它们的失真补偿量在设计功率水平以外的水平大大降低的问题。 本发明提供了一种失真补偿电路，包括：矢量调节器; 线性化器 线性信号提取路径，用于从矢量调节器的输入侧提取输入信号的一部分; 非线性信号提取路径，用于从放大器的输出侧提取输出信号的一部分; 电平检测器，用于检测来自线性信号提取路径和非线性信号提取路径的信号的组合功率电平; 以及控制电路，用于根据检测到的组合功率电平来调整线性化器的偏置，电调节线性化器，使得由电平检测器检测到的功率最小化，并且调整矢量调节器使得由电平检测器检测到的功率 每次线性化调节器被最小化。 结果，本发明的失真补偿电路可以随时独立于输入信号的平均功率变化，放大器的长期变化和由温度变化引起的放大器的状态变化而随时优化失真补偿。
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公开(公告)号：US4780354A
公开(公告)日：1988-10-25
申请号：US10990
申请日：1987-02-05
申请人： Masatoshi Nakayama , Kunihiro Ueda
发明人： Masatoshi Nakayama , Kunihiro Ueda
CPC分类号： G11B5/738 , G11B5/70 , Y10S428/90 , Y10T428/24355 , Y10T428/265
摘要： A magnetic recording medium comprising a substrate, a plasma polymerized film, and a magnetic layer is improved in physical and electromagnetic properties when the plasma polymerized film is comprised of carbon, or carbon and at least one optional element selected from hydrogen, nitrogen and oxygen.
摘要翻译： 当等离子体聚合膜由碳或碳和至少一种选自氢，氮和氧的任选元素组成时，包括基底，等离子体聚合膜和磁性层的磁记录介质的物理和电磁特性得到改善。
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公开(公告)号：US4749608A
公开(公告)日：1988-06-07
申请号：US41340
申请日：1987-04-22
IPC分类号： G11B5/72
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/24975 , Y10T428/265 , Y10T428/3154 , Y10T428/31544 , Y10T428/31692 , Y10T428/31699 , Y10T428/31935
摘要： A magnetic recording medium comprising a substrate, a ferromagnetic metal thin film on the substrate, and a topcoat on the thin film exhibits improved strength and durability when the topcoat is comprised of a plasma-polymerized film prepared by activating a gaseous hydrocarbon monomer or a mixture thereof with a carrier gas into a plasma under specific conditions. The plasma-polymerized film consists of carbon and hydrogen in an atomic ratio of C/H of from 1:1 to 6:1 and has a thickness of 3 to 15 .ANG. and a contact angle with water in the range from 60.degree. to 120.degree.. An organic coating may be present on the plasma-polymerized film.
摘要翻译： 包括基底，基底上的强磁性金属薄膜和薄膜上的面涂层的磁记录介质当顶涂层由通过活化气态烃单体或混合物制备的等离子体聚合膜构成时，具有改进的强度和耐久性 在载体气体在特定条件下进入等离子体。 等离子体聚合膜由C / H原子比为1：1至6：1的碳和氢组成，厚度为3至15 ANGSTROM，与水的接触角为60°至120° DEG。 有机涂层可存在于等离子体聚合膜上。
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公开(公告)号：US4745031A
公开(公告)日：1988-05-17
申请号：US813639
申请日：1985-12-26
CPC分类号： G11B5/7305 , G11B5/84 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/12931 , Y10T428/31678
摘要： In a magnetic recording medium of the hard disk type comprising a rigid substrate and a magnetic layer formed thereon, the substrate is plasma treated at frequencies in the range of 10 to 200 kHz in an inorganic gas containing O; N and H; and N, H and O.
摘要翻译： 在包括刚性基板和形成在其上的磁性层的硬盘类型的磁记录介质中，基板在含有O的无机气体中在10至200kHz范围内的频率进行等离子体处理; N和H; 和N，H和O.
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37.发明授权
公开(公告)号：US4737408A
公开(公告)日：1988-04-12
申请号：US897087
申请日：1986-08-18
IPC分类号： G11B7/243 , G11B7/254 , G11B11/105 , G11B7/24
CPC分类号： G11B7/252 , G11B11/10582 , G11B7/254 , G11B7/2575 , G11B2007/24306 , G11B7/2533 , Y10S428/90 , Y10T428/264 , Y10T428/265 , Y10T428/31692 , Y10T428/31855
摘要： In a magneto-optical recording medium comprising a perpendicular magnetizable thin film layer formed from an amorphous rare earth metal-transition metal alloy on a substrate with or without an intermediate layer, and a first protective layer formed from a plasma-polymerized film on the magnetizable layer; a second protective layer is formed on the first protective layer by curing a radiation-curable compound coating and/or an undercoat layer of a plasma-polymerized film is formed on the substrate in order to improve the moisture proofness of the magnetic layer. The substrate may be plasma treated to improve adherence. Covering the overall outside surface of the medium with a cured film of a radiation-curable compound ensures best shelf stability.
摘要翻译： 在包括在具有或不具有中间层的基板上由无定形稀土金属 - 过渡金属合金形成的垂直可磁化薄膜层的磁光记录介质中，以及由可磁化的等离子体聚合膜形成的第一保护层 层; 通过固化可辐射固化的化合物涂层在第一保护层上形成第二保护层和/或等离子体聚合膜的底涂层，以提高磁性层的防潮性。 可以对衬底进行等离子体处理以改善粘附性。 用可辐射固化化合物的固化膜覆盖介质的整个外表面确保了最佳的储存稳定性。
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公开(公告)号：US4618542A
公开(公告)日：1986-10-21
申请号：US673987
申请日：1984-11-21
CPC分类号： G11B5/85 , H01F41/20 , H01F41/22 , Y10S428/90
摘要： A magnetic thin film comprised of at least one, usually two magnetic metals selected from iron, nickel, and cobalt is vapor phase grown on a substrate, for example, polyimide film by introducing chemical compounds of the metals in vapor form, a reducing gas, and optionally, an oxidizing gas, into a vacuum chamber where the substrate is placed and preferably heated to a temperature of at least 100.degree. C., and subjecting the reaction gases to plasma excitation, thereby achieving the vapor phase growth of the magnetic thin film on the substrate.
摘要翻译： 由选自铁，镍和钴中的至少一种，通常两种磁性金属组成的磁性薄膜是通过引入蒸气形式的金属化合物，还原气体， 并且可选地，将氧化气体放入放置基板的真空室中，并优选加热至至少100℃的温度，并使反应气体进行等离子体激发，从而实现磁性薄膜的气相生长 在基板上。
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公开(公告)号：US4599266A
公开(公告)日：1986-07-08
申请号：US713562
申请日：1985-03-18
申请人： Masatoshi Nakayama , Haruyuki Morita , Yasumichi Tokuoka , Toshiaki Izumi , Kazumasa Fukuda , Yuichi Kubota
发明人： Masatoshi Nakayama , Haruyuki Morita , Yasumichi Tokuoka , Toshiaki Izumi , Kazumasa Fukuda , Yuichi Kubota
CPC分类号： G11B5/725 , Y10S428/90 , Y10T428/265 , Y10T428/31663
摘要： A magnetic recording medium is coated, over its magnetic layer, with a thin film of a siloxane-linkage-containing polymer. The magnetic layer consists of a thin film formed by vacuum evaporation or sputtering or by dispersion of a ferromagnetic metal powder in a binder. The polymer having the siloxane linkage is prepared by polymerizing an organo-silicon compound which either inherently possesses the linkage or is capable of producing it. The polymerization is preferably effected by the plasma polymerization technique.
摘要翻译： 磁性记录介质在其磁性层上涂覆含有含硅氧烷键的聚合物的薄膜。 磁性层由通过真空蒸发或溅射形成的薄膜或通过将铁磁金属粉末分散在粘合剂中而形成。 具有硅氧烷键的聚合物通过聚合固有地具有键或能够产生它的有机硅化合物来制备。 聚合反应优选通过等离子体聚合技术实现。
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公开(公告)号：US4575475A
公开(公告)日：1986-03-11
申请号：US629465
申请日：1984-07-10
CPC分类号： G11B5/7305 , G11B5/84 , Y10S428/90 , Y10T428/31786
摘要： In a magnetic recording medium comprising a plastic base film and a magnetic layer formed thereon, the base film is plasma treated at frequencies in the range of 10 kHz to 200 kHz in an inorganic gas such as argon and nitrogen and preferably, in an inorganic gas containing at least 5% of oxygen.
摘要翻译： 在包括塑料基膜和形成在其上的磁性层的磁记录介质中，在诸如氩气和氮气的无机气体中优选在10kHz至200kHz的范围内等离子体处理基膜，优选在无机气体 含有至少5％的氧气。
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