公开(公告)号：USRE35490E

公开(公告)日：1997-04-08

申请号：US295777

申请日：1989-01-11

申请人： Masaki Ohura ,  Makoto Saito

发明人： Masaki Ohura ,  Makoto Saito

IPC分类号： G11B5/31 ,  G11B5/147 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/3163

摘要： A thin film magnetic head for performing recording and readout operations to a magnetic recording medium and a method of manufacturing the head. The magnetic head .[.comprises.]. .Iadd.includes .Iaddend.a substrate, a first magnetic layer formed on the substrate, a conductor coil on the first layer and a second magnetic layer formed on the conductor coil and the first magnetic layer. The second magnetic layer is imparted with a greater thickness than the first magnetic layer to thereby strengthen the magnetic field for recording and reducing the peak shift making appearance in readout operation due to interference between successively read-out waveforms. The thin film magnetic head exhibits an improved reproduction characteristic which permits reproduction with high fidelity the magnetized locations recorded on the medium with high recording density which assures an improved recording characteristic. .Iadd.By controlling the thickness of the second magnetic layer at an inclined portion thereof, magnetic saturation thereat is substantially prevented. .Iaddend.

摘要翻译： 一种用于对磁记录介质执行记录和读出操作的薄膜磁头及其制造方法。 磁头[包括]包括基板，形成在基板上的第一磁性层，第一层上的导体线圈和形成在导体线圈和第一磁性层上的第二磁性层。 第二磁性层被赋予比第一磁性层更大的厚度，从而加强用于记录的磁场，并且由于连续读出的波形之间的干涉而减少由于读出操作引起的峰值偏移。 薄膜磁头具有改善的再现特性，其允许以高保真度再现记录在具有高记录密度的介质上的磁化位置，这确保了改进的记录特性。 通过在其倾斜部分控制第二磁性层的厚度，基本上防止了其上的磁饱和。

公开(公告)号：US4939045A

公开(公告)日：1990-07-03

申请号：US172194

申请日：1988-03-23

申请人： Kazuetsu Yoshida ,  Yoshihiro Shiroishi ,  Makoto Saito ,  Norikazu Tsumita ,  Takeo Yamashita ,  Hiroyuki Suzuki ,  Yasushi Kitazaki ,  Masaki Ohura ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yoshibumi Matsuda ,  Kazumasa Takagi ,  Katsuhiro Kuroda ,  Sadanori Nagaike

发明人： Kazuetsu Yoshida ,  Yoshihiro Shiroishi ,  Makoto Saito ,  Norikazu Tsumita ,  Takeo Yamashita ,  Hiroyuki Suzuki ,  Yasushi Kitazaki ,  Masaki Ohura ,  Sadao Hishiyama ,  Tomoyuki Ohno ,  Yoshibumi Matsuda ,  Kazumasa Takagi ,  Katsuhiro Kuroda ,  Sadanori Nagaike

IPC分类号： G01R33/12 ,  G11B5/64

CPC分类号： G01R33/1207 ,  G11B5/64 ,  Y10S428/928 ,  Y10T428/12833 ,  Y10T428/12861

摘要： Disclosed are a magnetic recording medium having a magnetic recording layer formed of a magnetic thin film in which rotational hysteresis integral R.sub.H is within a range of from 0.4 to 1.3 in the measurement by a torque magnetometer, and a continuous magnetic recording medium in which crystal grains are substantially randomly arranged on the upper surface of a magnetic recording layer or on the surface of a non-magnetic subbing layer, and in which each of the crystal grains is made to be in the form of an ellipsoid or needle and to have a length-ways axial ratio of a major axis to a minor axis not smaller than 2, more preferably, not smaller than 4.

摘要翻译： 公开了一种磁记录介质，其具有由磁性薄膜形成的磁记录层，其中旋转磁滞积分RH在通过转矩磁力计的测量中在0.4至1.3的范围内，以及连续磁记录介质，其中晶粒 基本上随机地布置在磁记录层的上表面上或非磁性底层的表面上，并且其中每个晶粒被制成椭圆形或针状，并且具有长度 长轴与短轴的轴向比不小于2，更优选不小于4。

公开(公告)号：US4636901A

公开(公告)日：1987-01-13

申请号：US463656

申请日：1983-02-03

申请人： Masaki Ohura ,  Makoto Saito

发明人： Masaki Ohura ,  Makoto Saito

IPC分类号： G11B5/31 ,  G11B5/147 ,  G11B5/127 ,  G11B5/23

CPC分类号： G11B5/3116 ,  G11B5/3163

摘要： A thin film magnetic head for performing recording and readout operations to a magnetic recording medium and a method of manufacturing the head. The magnetic head comprises a substrate, a first magnetic layer formed on the substrate, a conductor coil on the first layer and a second magnetic layer formed on the conductor coil and the first magnetic layer. The second magnetic layer is imparted with a greater thickness than the first magnetic layer to thereby strengthen the magnetic field for recording and reducing the peak shift making appearance in readout operation due to interference between successively read-out waveforms. The thin film magnetic head exhibits an improved reproduction characteristic which permits reproduction with high fidelity the magnetized locations recorded on the medium with high recording density which assures an improved recording characteristic.

摘要翻译： 一种用于对磁记录介质执行记录和读出操作的薄膜磁头及其制造方法。 磁头包括基板，形成在基板上的第一磁性层，第一层上的导体线圈和形成在导体线圈和第一磁性层上的第二磁性层。 第二磁性层被赋予比第一磁性层更大的厚度，从而加强用于记录的磁场，并且由于连续读出的波形之间的干涉而减少由于读出操作引起的峰值偏移。 薄膜磁头具有改善的再现特性，其允许以高保真度再现记录在具有高记录密度的介质上的磁化位置，这确保了改进的记录特性。

公开(公告)号：US5504646A

公开(公告)日：1996-04-02

申请号：US77874

申请日：1993-06-18

申请人： Hideaki Tanaka ,  Kenichi Gomi ,  Yoshihiko Miyake ,  Sigeru Sano ,  Youichi Inomata ,  Hiroshi Yashiki ,  Yoshiki Kato ,  Masaki Ohura

发明人： Hideaki Tanaka ,  Kenichi Gomi ,  Yoshihiko Miyake ,  Sigeru Sano ,  Youichi Inomata ,  Hiroshi Yashiki ,  Yoshiki Kato ,  Masaki Ohura

IPC分类号： G11B5/41 ,  G11B5/58 ,  G11B5/60 ,  G11B5/72 ,  G11B5/82 ,  G11B5/84 ,  G11B23/50

CPC分类号： G11B5/6005 ,  G11B23/505 ,  G11B5/72 ,  G11B5/82 ,  G11B5/8408 ,  G11B5/41 ,  G11B5/581 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24537 ,  Y10T428/2457

摘要： There is provided a magnetic disk apparatus comprising: at least one magnetic disk having a magnetic layer and a surface protective layer on a substrate; a magnetic head which faces the magnetic disk in a rotating state with a micro gap and is supported by a slider; rotating means for rotating the magnetic disk; and a actuator for moving and positioning the magnetic head to a predetermined position on the magnetic disk, wherein a plurality of protrusions each having a flat surface are formed in at least a region on the surface of the magnetic disk where a contact start/stop operation can be executed. According to the above magnetic disk apparatus, since the frictional force between the disk and the head is small and the flying height of the head can be reduced and the good floating stability is obtained, so that the excellent recording and reproducing characteristics are derived. Further, protrusions are formed on the protective layer of the magnetic disk and the protrusion shapes are changed in a accordance with a radial position of the magnetic disk depending on the flying height of the magnetic head. According to the above magnetic disk apparatus, since the change of spacing can be set smaller than the change of the flying height, high recording density can be achieved.

摘要翻译： 提供一种磁盘装置，包括：在基板上具有磁性层和表面保护层的至少一个磁盘; 磁头，其在具有微小间隙的旋转状态下面对磁盘，并由滑块支撑; 用于旋转磁盘的旋转装置; 以及用于将磁头移动和定位到磁盘上的预定位置的致动器，其中在磁盘表面上的至少一个区域中形成有各自具有平坦表面的多个突起，其中接触开始/停止操作 可以执行。 根据上述磁盘装置，由于盘与头部之间的摩擦力小，能够降低头部的飞行高度，并且获得良好的浮动稳定性，从而导出良好的记录和再现特性。 此外，在磁盘的保护层上形成突起，并且根据磁头的飞行高度，根据磁盘的径向位置改变突起形状。 根据上述磁盘装置，由于可以将间隔的变化设定得小于飞行高度的变化，所以可以实现高的记录密度。

公开(公告)号：US5353182A

公开(公告)日：1994-10-04

申请号：US985176

申请日：1992-12-02

申请人： Takao Nakamura ,  Nobuya Sekiyama ,  Masaki Ohura ,  Yoshiki Kato ,  Noriaki Okamoto ,  Masami Masuda

发明人： Takao Nakamura ,  Nobuya Sekiyama ,  Masaki Ohura ,  Yoshiki Kato ,  Noriaki Okamoto ,  Masami Masuda

IPC分类号： G11B5/82 ,  G11B5/84 ,  G11B5/48 ,  B05D5/12 ,  G11B5/012

CPC分类号： G11B5/8404 ,  G11B5/82 ,  Y10S428/90

摘要： A magnetic disk includes a non-magnetic substrate with a surface processed layer having fine irregularities formed at least on a main surface thereof, and at least a thin film magnetic film and a protective film formed in that order on the non-magnetic substrate in such a manner that the fine irregularities are duplicated thereof. The surface of the surface processed layer of the non-magnetic substrate has protrusions whose surfaces are made flat and a configuration which exhibits a three-dimensional bearing curve in which the bearing ratio at a section taken at a depth from the top of the surface which corresponds to the portion of the top portion deformed by the head load during the contact start-stops drive is between 0.1% and 10%. The protrusions formed on the surface processed layer have a height ranging from several nm to several tens of nm. The bearing ratio is a value obtained at a depth of 5 to 10 nm from the top of the protrusions.

摘要翻译： 磁盘包括具有至少在其主表面上形成有细微凹凸的表面处理层的非磁性基板，以及至少在非磁性基板上依次形成的薄膜磁性膜和保护膜 这种细微的不规则性被复制的方式。 非磁性基板的表面处理层的表面具有突起，其表面是平坦的，并且具有三维轴承曲线的构造，其中在从表面的顶部开始的深度处截取的截面的轴承比 对应于在接触开始 - 停止期间头部负载变形的顶部的部分在0.1％和10％之间。 形成在表面处理层上的突起具有几nm至几十nm的高度。 轴承比是从突起的顶部开始的深度为5〜10nm的值。

公开(公告)号：US5280401A

公开(公告)日：1994-01-18

申请号：US796830

申请日：1991-11-25

申请人： Youichi Inomata ,  Yoshiki Kato ,  Masaki Ohura

发明人： Youichi Inomata ,  Yoshiki Kato ,  Masaki Ohura

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  G11B5/84 ,  G11B5/85 ,  G11B5/851

CPC分类号： G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

摘要： The magnetic recording medium includes a nonmagnetic substrate having different values of surface tension corresponding to surface free energy in a predetermined magnetic recording direction and in the direction substantially perpendicular thereto, a magnetic film epitaxially grown on the nonmagnetic substrate, and a protective film on the magnetic film. The surface of the nonmagnetic substrate is provided with irregular surfaces having gradients of 45 degrees .+-.10 degrees relative to the substrate surface. The magnetic film has a main component of an easy axis of magnetization in the magnetic recording direction. The hydrogen peroxide aqueous solution and nitric acid used for the surface treatment of the substrate affect differently the critical surface tension. The partial nonmetal layer can be partially worked to provide textures extending in the magnetic recording direction. The nonmagnetic substrate and the magnetic film are respectively made of substantially nickel-phosphorus and cobalt, and the partial nonmetal layer is made of carbon.

摘要翻译： 磁记录介质包括具有表面张力的非磁性基板（1），其表面张力的值在规定的磁记录方向上与其大致垂直的方向不同，并且形成在所述磁记录介质上的磁性膜（3） 通过插入非磁性金属层（2）并具有在磁记录方向上延伸的准备磁化的主要分量的衬底，膜（3）被覆盖有保护层（4）。 尤其适用于磁存储器。

公开(公告)号：US5500296A

公开(公告)日：1996-03-19

申请号：US183900

申请日：1994-01-21

申请人： Youichi Inoue ,  Yoshihiro Sato ,  Shinichi Hirose ,  Hiroshi Tani ,  Katsuyuki Tanaka ,  Katsuo Abe ,  Masaki Ohura ,  Muneo Mizumoto

发明人： Youichi Inoue ,  Yoshihiro Sato ,  Shinichi Hirose ,  Hiroshi Tani ,  Katsuyuki Tanaka ,  Katsuo Abe ,  Masaki Ohura ,  Muneo Mizumoto

IPC分类号： G11B5/72 ,  G11B5/725 ,  G11B5/84 ,  B32B9/00 ,  B32B27/00 ,  C23C14/00 ,  G11B5/66

CPC分类号： G11B5/725 ,  G11B5/72 ,  G11B5/8408 ,  Y10S428/90 ,  Y10T428/12458 ,  Y10T428/30 ,  Y10T428/3154

摘要： The present invention provides a magnetic recording medium wherein the surface layer of the protective film of the medium is irradiated by ions to give a protective film having high reliability in resistance to sliding with the magnetic head, a process for producing the medium, an apparatus for producing the medium, and a magnetic recording apparatus having the medium mounted therein. The essentials of the present invention lie in introducing a minute surface roughness of atomic order in the surface of the protective film 5 constituting the outermost layer of a magnetic recording medium by irradiating atoms accelerated by high voltage (that is, by implanting ions) to the surface.

摘要翻译： 本发明提供了一种磁记录介质，其中介质的保护膜的表面层被离子照射以产生具有高磁性抗滑性的高可靠性的保护膜，制备介质的方法， 产生介质，以及其中安装介质的磁记录装置。 本发明的要点在于，通过将通过高压加速的原子（即，通过注入离子）照射到构成磁记录介质的最外层的保护膜5的表面中，引入原子级的微小表面粗糙度 表面。

公开(公告)号：US5272581A

公开(公告)日：1993-12-21

申请号：US760073

申请日：1991-09-13

申请人： Shyuichi Kojima ,  Hiroyuki Suzuki ,  Akira Kato ,  Keigo Iechika ,  Mikio Takada ,  Masaki Ohura

发明人： Shyuichi Kojima ,  Hiroyuki Suzuki ,  Akira Kato ,  Keigo Iechika ,  Mikio Takada ,  Masaki Ohura

IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/82 ,  G11B17/038 ,  G11B19/20 ,  G11B23/00 ,  G11B23/03 ,  G11B25/04 ,  G11B5/016

CPC分类号： G11B23/0035 ,  G11B17/038 ,  G11B19/20 ,  G11B25/043 ,  G11B5/82

摘要： A disk-type recording medium having a circular substrate on which a recording layer is formed does not include any through hole formed in the center of rotation. Since no through hole is formed, it is possible to improve the reliability of the medium with regard to its strength, and to reduce the thickness of the substrate. Further, it is possible to render the thickness of the recording coating uniform.

摘要翻译： 具有形成有记录层的圆形基板的盘式记录介质不包括形成在旋转中心的任何通孔。 由于没有形成通孔，因此可以提高介质的强度的可靠性，并且可以减小基板的厚度。 此外，可以使记录涂层的厚度均匀。

公开(公告)号：US5202810A

公开(公告)日：1993-04-13

申请号：US513609

申请日：1990-04-24

申请人： Takao Nakamura ,  Nobuya Sekiyama ,  Masaki Ohura ,  Yoshiki Kato ,  Noriaki Okamoto ,  Masami Masuda

发明人： Takao Nakamura ,  Nobuya Sekiyama ,  Masaki Ohura ,  Yoshiki Kato ,  Noriaki Okamoto ,  Masami Masuda

IPC分类号： G11B5/82 ,  G11B5/84

CPC分类号： G11B5/8404 ,  G11B5/82 ,  Y10S428/90

摘要： A magnetic disk includes a non-magnetic substrate with a surface processed layer having fine irregularities formed at least on a main surface thereof, and at least thin film magnetic film and a protective film formed in that order on the non-magnetic substrate in such a manner that the fine irregularities are duplicated thereof. The surface of the surface processed layer of the non-magnetic substrate has protrusions whose surfaces are made flat and a configuration which exhibits a three-dimensional bearing curve in which the bearing ratio at a section taken at a depth from the top of the surface which corresponds to the portion of the top portion deformed by the head load during the contact start-stops drive is between 0.1% and 10%. The protrusions formed on the surface processed layer have a height ranging from several nm to several tens of nm. The bearing ratio is a value obtained at a depth of 5 to 10 nm from the top of the protrusions.

摘要翻译： 磁盘包括具有至少在其主表面上形成有细微凹凸的表面处理层的非磁性基板，以及至少在非磁性基板上形成的薄膜磁性膜和保护膜。 方式是细微的不规则被复制。 非磁性基板的表面处理层的表面具有突起，其表面是平坦的，并且具有三维轴承曲线的构造，其中在从表面的顶部开始的深度处截取的截面的轴承比 对应于在接触开始 - 停止期间头部负载变形的顶部的部分在0.1％和10％之间。 形成在表面处理层上的突起具有几nm至几十nm的高度。 轴承比是从突起的顶部开始的深度为5〜10nm的值。

公开(公告)号：US5158833A

公开(公告)日：1992-10-27

申请号：US484526

申请日：1990-02-26

申请人： Shinya Matsuoka ,  Masaki Ohura ,  Takaaki Shirakura ,  Yoshihiro Shiraisi

发明人： Shinya Matsuoka ,  Masaki Ohura ,  Takaaki Shirakura ,  Yoshihiro Shiraisi

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/706 ,  G11B5/73 ,  G11B5/738

CPC分类号： G11B5/656 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12931 ,  Y10T428/30

摘要： A magnetic recording medium having high recording density and being capable of obtaining excellent over-write characteristics by having a magnetic layer including Co and Ni as its principal components on a non-magnetic substrate, the Ni content of the magnetic layer is greater at portions closer to the surface of the magnetic layer in the direction of its thickness; the Ni content at portions closer to the surface of the magnetic layer is 20.about.50 at %; and the portion closer to the surface of the magnetic layer has at least one element selected from the group consisting of Zr, Ti, Pt, Ru, Ta, Rh, V, Nb, Cr and Pd.

摘要翻译： 一种具有高记录密度并且能够通过在非磁性衬底上具有包括Co和Ni作为主要成分的磁性层而获得优异的叠加特性的磁记录介质，磁性层的Ni含量在接近部分时更大 在其厚度方向到磁性层的表面; 靠近磁性层表面的部分的Ni含量为20％; 并且更靠近磁性层表面的部分具有选自Zr，Ti，Pt，Ru，Ta，Rh，V，Nb，Cr和Pd中的至少一种元素。