-
公开(公告)号：US06528149B2
公开(公告)日：2003-03-04
申请号：US09811471
申请日：2001-03-20
IPC分类号： H01F1000
CPC分类号： G11B5/66 , Y10T428/12861 , Y10T428/24942 , Y10T428/31678
摘要： The present invention relates to perpendicular magnetic recording media using a ferromagnetic film provided with perpendicular magnetic anisotropy for a recording layer and a magnetic recording apparatus using the media, and the object is to provide the perpendicular magnetic recording media which are excellent in signal to noise ratio (S/N) in a large recording density region, which are stable against thermal fluctuation and which can be easily manufactured, and the magnetic recording apparatus using the media. The representative perpendicular magnetic recording media according to the invention include a glass substrate, a first recording layer which is provided on the substrate via an underlayer, which has perpendicular magnetic anisotropy and the magnitude of magnetic exchange interaction between grains of which is substantially zero and a second recording layer which is laminated on the first recording layer, which is provided with perpendicular magnetic anisotropy and the magnetic exchange interaction between grains of which is larger than that of the first recording layer.
-
公开(公告)号：US06641901B2
公开(公告)日：2003-11-04
申请号：US10340597
申请日：2003-01-13
IPC分类号： H01F1000
CPC分类号： G11B5/66 , Y10T428/12861 , Y10T428/24942 , Y10T428/31678
摘要： The present invention relates to perpendicular magnetic recording media using a ferromagnetic film provided with perpendicular magnetic anisotropy for a recording layer and a magnetic recording apparatus using the media, and the object is to provide the perpendicular magnetic recording media which are excellent in signal to noise ratio (S/N) in a large recording density region, which are stable against thermal fluctuation and which can be easily manufactured, and the magnetic recording apparatus using the media. The representative perpendicular magnetic recording media according to the invention include a glass substrate, a first recording layer which is provided on the substrate via an underlayer, which has perpendicular magnetic anisotropy and the magnitude of magnetic exchange interaction between grains of which is substantially zero and a second recording layer which is laminated on the first recording layer, which is provided with perpendicular magnetic anisotropy and the magnetic exchange interaction between grains of which is larger than that of the first recording layer.
-
公开(公告)号：US06852398B2
公开(公告)日：2005-02-08
申请号：US10645584
申请日：2003-08-22
CPC分类号： G11B5/66 , Y10T428/12861 , Y10T428/24942 , Y10T428/31678
摘要： The present invention relates to perpendicular magnetic recording media using a ferromagnetic film provided with perpendicular magnetic anisotropy for a recording layer and a magnetic recording apparatus using the media, and the object is to provide the perpendicular magnetic recording media which are excellent in signal to noise ratio (S/N) in a large recording density region, which are stable against thermal fluctuation and which can be easily manufactured, and the magnetic recording apparatus using the media. The representative perpendicular magnetic recording media according to the invention include a glass substrate, a first recording layer which is provided on the substrate via an underlayer, which has perpendicular magnetic anisotropy and the magnitude of magnetic exchange interaction between grains of which is substantially zero and a second recording layer which is laminated on the first recording layer, which is provided with perpendicular magnetic anisotropy and the magnetic exchange interaction between grains of which is larger than that of the first recording layer.
摘要翻译： 本发明涉及使用具有用于记录层的垂直磁各向异性的铁磁膜和使用该介质的磁记录装置的垂直磁记录介质，其目的是提供信噪比优异的垂直磁记录介质 （S / N）在大的记录密度区域中，其对于热波动是稳定的并且可以容易地制造，以及使用该介质的磁记录装置。 根据本发明的代表性的垂直磁记录介质包括玻璃基板，通过底层设置在基板上的第一记录层，其具有垂直的磁各向异性，并且其晶粒之间的磁交换相互作用的大小基本为零， 层叠在第一记录层上的第二记录层，其具有垂直的磁各向异性，并且其晶粒之间的磁交换相互作用大于第一记录层的磁交换相互作用。
-
24.发明授权
公开(公告)号：US5875082A
公开(公告)日：1999-02-23
申请号：US794709
申请日：1997-02-04
申请人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
发明人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
摘要： A magnetic recording medium wherein, when the axis of easy magnetization of the magnetic recording medium for magnetically recording information by means of a magnetic head is projected onto a surface of the magnetic recording medium, the axis projected onto the surface of the magnetic recording medium exists so as to be unidirectionally inclined with respect to the direction of a track on which information is to be recorded, whereby, by using the magnetic recording medium, there can be provided a magnetic head and a magnetic read-write apparatus greatly improved in longitudinal recording density.
摘要翻译： 一种磁记录介质，其中当用于通过磁头磁信息记录的磁记录介质的易磁化轴被投影到磁记录介质的表面上时，投射到磁记录介质的表面上的轴存在 相对于要记录信息的轨道的方向是单向倾斜的，由此通过使用磁记录介质，可以提供在纵向记录中大大改进的磁头和磁读写装置 密度。
-
25.发明授权
公开(公告)号：US5759681A
公开(公告)日：1998-06-02
申请号：US595303
申请日：1996-02-01
申请人： Yuzuru Hosoe , Kazuetsu Yoshida , Nobuyuki Inaba , Tomoo Yamamoto , Akira Ishikawa , Masaaki Futamoto , Hiroyuki Kataoka , Yoshihiro Shiroishi
发明人： Yuzuru Hosoe , Kazuetsu Yoshida , Nobuyuki Inaba , Tomoo Yamamoto , Akira Ishikawa , Masaaki Futamoto , Hiroyuki Kataoka , Yoshihiro Shiroishi
CPC分类号： G11B5/1278 , G11B5/3967 , G11B5/66 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording system includes an intermediate layer arranged between adjacent ones of a plurality of magnetic layers constituting a magnetic recording medium, the magnetic recording medium driven by a drive section in the recording direction, and a magnetic head including a write section and a read-back section set in relative motion with respect to the magnetic recording medium. Signals are applied to the magnetic head and the output signals from the magnetic head are read back by a read/write signal processing device. The read-back section of the magnetic head includes a magnetoresistive magnetic head. The magnetic layers of the magnetic recording medium include crystal grains having different crystal orientations and existing in overlapped positions in the direction perpendicular to the medium surface. High-density information read/write operation thus is made possible with an improved reliability.
摘要翻译： 磁记录系统包括布置在构成磁记录介质的多个磁性层的相邻磁记录层之间的中间层，由记录方向上的驱动部分驱动的磁记录介质，以及包括写入区和读出区的磁头， 相对于磁记录介质相对运动地设置。 信号被施加到磁头，并且来自磁头的输出信号由读/写信号处理装置读回。 磁头的回读部分包括磁阻磁头。 磁记录介质的磁性层包括具有不同晶体取向并且在与介质表面垂直的方向上重叠位置的晶粒。 因此，高密度信息读/写操作可以提高可靠性。
-
26.发明授权Multi-layered magnetic recording medium and magnetic recording system employing the same 失效多层磁记录介质和采用该磁记录介质的磁记录系统
公开(公告)号：US5723198A
公开(公告)日：1998-03-03
申请号：US258923
申请日：1994-06-13
申请人： Yuzuru Hosoe , Yoshihiro Shiroishi , Akira Ishikawa , Futoshi Tomiyama , Kazuetsu Yoshida , Tomoo Yamamoto , Yotsuo Yahisa , Akira Osaki , Katsuo Abe , Shinji Narishige , Naoki Kodama , Kiwamu Tanahashi , Emi Mangyo
发明人： Yuzuru Hosoe , Yoshihiro Shiroishi , Akira Ishikawa , Futoshi Tomiyama , Kazuetsu Yoshida , Tomoo Yamamoto , Yotsuo Yahisa , Akira Osaki , Katsuo Abe , Shinji Narishige , Naoki Kodama , Kiwamu Tanahashi , Emi Mangyo
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/24355 , Y10T428/24942 , Y10T428/265
摘要： In a magnetic recording system including magnetic recording media, a rotation driving unit for driving these magnetic recording media, read/write magnetic heads, driving apparatus for driving these read/write magnetic heads, and a read/write signal processing apparatus, a reading portion of the respective magnetic heads is arranged by a magnetoresistive head. The magnetic recording media are constructed of multi-layered magnetic media having a plurality of magnetic layers fabricated directly, or via underlayers on a non-magnetic disk substrate, and of non-magnetic intermediate layers arranged among these non-magnetic layers. Furthermore, one coercivity which is measured by applying a magnetic field along a circumferential direction of the magnetic recording media, is selected to be larger than the other coercivity which is measured by applying a magnetic field along a radial direction of the magnetic recording media, so that a higher signal-to-noise ratio is achieved, as compared with that of the conventional magnetic recording system. Since the thickness of the non-magnetic intermediate layers is smaller than or equal to 5 nm, and also the total layer is smaller than or equal to 5 nm, and also the total layer number of the plural magnetic layers is selected to be odd, better characteristics can be achieved. Accordingly, since the MTBF (Mean Time Before Failure) is longer than or equal to 0.15 million hours with high recording density, and the disk substrate and the magnetic head sliders can be mounted at high packaging density, a compact and high-capacity magnetic recording system can be obtained.
摘要翻译： 在包括磁记录介质的磁记录系统中，用于驱动这些磁记录介质的旋转驱动单元，读/写磁头，用于驱动这些读/写磁头的驱动装置以及读/写信号处理装置，读/ 相应的磁头由磁阻头安排。 磁记录介质由具有直接制造的多个磁性层或通过非磁盘基板上的底层以及布置在这些非磁性层之间的非磁性中间层的多层磁性介质构成。 此外，通过沿着磁记录介质的圆周方向施加磁场来测量的一个矫顽力被选择为大于通过沿着磁记录介质的径向方向施加磁场而测量的其他矫顽力，因此， 与常规磁记录系统相比，实现了更高的信噪比。 由于非磁性中间层的厚度小于或等于5nm，并且总层小于或等于5nm，并且多个磁性层的总层数也被选择为奇数， 可以实现更好的特性。 因此，由于MTBF（平均故障间隔时间）长于或等于0.15万小时，具有高记录密度，并且盘基板和磁头滑块可以以高封装密度安装，紧凑且高容量的磁记录 系统可以得到。
-
27.发明授权
公开(公告)号：US4174373A
公开(公告)日：1979-11-13
申请号：US609081
申请日：1975-08-29
IPC分类号： B01D53/60 , B01D53/74 , B01J21/18 , B01J23/10 , B01J23/16 , B01J23/70 , B01J27/00 , C01C1/242 , B01D53/34
CPC分类号： B01D53/60
摘要： A catalyst comprising carbonaceous materials such as activated carbon, etc. impregnated with bromine, iodine, chlorine or their compounds, is impregnated with a promoter containing a specific metal, and brought in contact with a flue gas in the presence of ammonia, whereby nitrogen oxides and sulfur oxides contained in the flue gas are removed with a very high percent removal. The removal can be carried out at a temperature much lower than that of the conventional process.
摘要翻译： 含有用溴，碘，氯或其化合物浸渍的碳质材料如活性炭等的催化剂用含有特定金属的助催化剂浸渍，并在氨的存在下与烟气接触，由此氮氧化物 并且以非常高的百分比去除除去烟道气中所含的硫氧化物。 去除可以在比常规方法低得多的温度下进行。
-
公开(公告)号：US06778471B1
公开(公告)日：2004-08-17
申请号：US09604557
申请日：2000-06-27
申请人： Kazuetsu Yoshida , Hiroaki Nemoto , Hideki Saga
发明人： Kazuetsu Yoshida , Hiroaki Nemoto , Hideki Saga
IPC分类号： G11B1100
CPC分类号： G11B5/00 , G11B5/09 , G11B2005/0002 , G11B2005/0005 , G11B2005/0016 , G11B2005/0021
摘要： In an optical recording and magnetic-head reproducing system, the reproduced output is prevented from starting to decrease, upon the length of record bits getting shorter, in the range of the bit length larger than reproducing resolution of a magnetic reproducing head. When data are recorded magneto-optically on a magnetic recording medium, the radius of curvature of arcs constituting the boundary of recorded magnetic domains is made as large as possible so that the shape of the recorded spot may be substantially rectangular. As a result, it becomes possible to improve the efficiency of magnetic reproduction, and high-output as well as high-SN-ratio reproduction at high linear recording density can be achieved.
摘要翻译： 在光学记录和磁头再现系统中，在比特长度大于磁再现头的再现分辨率的范围内，在记录位长度越来越短的情况下，防止再现的输出开始减小。 当数据在磁记录介质上磁光记录时，构成记录磁畴的边界的弧的曲率半径尽可能大，使得记录点的形状可以是大致矩形。 结果，可以提高磁再现的效率，并且可以实现在高线性记录密度下的高输出以及高SN比再现。
-
29.发明授权公开(公告)号：US06456448B1
公开(公告)日：2002-09-24
申请号：US09435036
申请日：1999-11-05
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/64 , G11B5/82 , G11B2005/001
摘要： A magnetic recording system which can suppress an influence by a thermal fluctuation and is suitable for the high density magnetic recording in which excellent S/N ratio and resolution are obtained is provided. There is provided a magnetic recording system constructed by: a magnetic recording medium having a magnetic layer formed on a substrate through an underlayer; a driving unit for driving the medium in the recording direction; a magnetic head constructed by a recording unit and a reproducing unit; an apparatus for relatively moving the magnetic head to the magnetic recording medium; and a recording reproduction signal processing apparatus for performing a signal input to the magnetic head and an output signal reproduction from the magnetic head, wherein the reproducing unit of the magnetic head is constructed by a magneto-resistance effect type head and the system has a recording magnetization pattern in which a magnetization transition length of the magnetic recording medium is equal to 70 nm or less, the direction of an axis of easy magnetization of the magnetic particles in the magnetic layer of the magnetic recording medium is three-dimensionally oriented. Even after the elapse of 100 hours after the recording and at a linear recording density of 360 kfci, a reproduction output hardly decreases. A degree of deterioration of the S/N ratio of the output to the noises and the resolution are smaller than that of the conventional system.
摘要翻译： 能够抑制热波动的影响的磁记录系统，适用于获得优异的S / N比和分辨率的高密度磁记录。 提供一种磁记录系统，其通过以下方式构成：磁记录介质，其具有通过底层在基板上形成的磁性层; 用于在记录方向上驱动介质的驱动单元; 由记录单元和再现单元构成的磁头; 用于将磁头相对移动到磁记录介质的装置; 以及用于执行向磁头输入的信号和从磁头再现的输出信号的记录再现信号处理装置，其中磁头的再现单元由磁阻效应型磁头构成，并且系统具有记录 磁记录介质的磁化转变长度等于或小于70nm的磁化模式，磁记录介质的磁性层中的磁性颗粒容易磁化的轴的方向是三维取向的。 即使在记录100小时后，线性记录密度为360kfci，再现输出几乎不降低。 输出与噪声的S / N比和分辨率的劣化程度小于常规系统的劣化程度。
-
30.发明授权Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 失效使用均衡器的记录均衡器和磁记录/再现装置公开(公告)号：US06356402B2
公开(公告)日：2002-03-12
申请号：US09790613
申请日：2001-02-23
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.
摘要翻译： 当在磁记录介质上用磁记录头记录磁信息时，用于校正磁信息的写定时的记录均衡器包括：用于存储记录对象位的缓冲器和记录对象位之前和之后的位;以及计算器， 使用存储在缓冲器中的位来计算预补偿参数。 计算器通过线性地添加存在于记录对象位的前两位的转变的影响，记录对象位的前一位的转变的影响和影响的影响来计算记录对象位的前置补偿参数 存在于记录对象位的一个后续位的转换，并进一步添加偏移。 偏移被确定为使得磁信息的写入定时总是以延迟方向校正的值。
-
-
-
-
-
-
-
-
-
搜索结果
40 条记录 (耗时 0.026 秒)