公开(公告)号：US06686072B2

公开(公告)日：2004-02-03

申请号：US09940853

申请日：2001-08-29

申请人： Akira Sakawaki ,  Masato Kokubu ,  Hiroshi Sakai

发明人： Akira Sakawaki ,  Masato Kokubu ,  Hiroshi Sakai

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/12465

摘要： A magnetic recording medium which exhibits excellent magnetic characteristics and which can be easily produced is disclosed. A magnetic recording medium containing a non-metallic substrate 1, a non-magnetic undercoat film 3, a cobalt alloy hexagonal closed packed (hcp) (110) textured magnetic film 4, and a protective film 5 formed on the substrate. An orientation-determining film 2, which determines the crystal orientation of an undercoat film provided directly thereon to cause the texture of the undercoat film to be (200), is formed between the substrate 1 and the undercoat film 3. The orientation-determining film 2 has a crystal structure such that columnar fine crystal grains 2a are inclined in a radial direction of the substrate 1, and the ratio of a coercive force in a circumferential direction of the medium (Hcc) to a coercive force in a radial direction of the medium (Hcr); i.e., Hcc/Hcr, is more than 1.

摘要翻译： 公开了一种表现出优异的磁特性并且易于生产的磁记录介质。 包含非金属基底1，非磁性底涂层3，钴合金六方密封（hcp）（110）纹理磁性膜4和形成在基底上的保护膜5的磁记录介质。 在基板1和底涂膜3之间形成取向决定膜2，该取向决定膜2确定直接设置在其上以使底涂层的织构成为（200）的底涂膜的晶体取向。取向决定膜 2具有晶体结构，使得柱状细晶粒2a沿着基板1的径向倾斜，并且介质（Hcc）的圆周方向上的矫顽力与径向方向上的矫顽力的比率 中等（Hcr）; 即Hcc / Hcr大于1。

公开(公告)号：US06808830B2

公开(公告)日：2004-10-26

申请号：US10329686

申请日：2002-12-27

申请人： Akira Sakawaki ,  Hiroshi Sakai

发明人： Akira Sakawaki ,  Hiroshi Sakai

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/66 ,  G11B5/84 ,  G11B5/8404 ,  Y10S428/90

摘要： The present invention is made to provide a magnetic recording medium, which exhibits excellent magnetic characteristics, such as thermal stability and excellent glide height characteristics, and can be easily produced. The basic constitution is a non-magnetic substrate on which is formed a non-magnetic undercoat layer, a magnetic layer, and a protective layer, wherein the non-magnetic undercoat layer has a bcc structure; an orientation-adjustment layer for causing the non-magnetic undercoat layer to have a predominant orientation plane of (200) is formed between the non-magnetic substrate and the non-magnetic undercoat layer; the magnetic layer has a crystal structure in which columnar fine crystal grains are inclined in the circumferential direction; and the ratio of the coercive force in the circumferential direction of the magnetic layer 4 Hcc to the coercive force in the radial direction Hcr, i.e., Hcc/Hcr, is more than 1.

摘要翻译： 本发明提供一种表现出优异的磁特性的磁记录介质，例如热稳定性和优异的滑移高度特性，并且可以容易地制造。 基本结构是非磁性基板，其上形成有非磁性底涂层，磁性层和保护层，其中非磁性底涂层具有bcc结构; 在非磁性基板和非磁性底涂层之间形成用于使非磁性底涂层具有（200）的主导取向面的取向调整层; 磁性层具有柱状细晶粒在圆周方向上倾斜的晶体结构; 并且磁性层4Hcc的圆周方向的矫顽力与径向Hcr的矫顽力Hcr / Hcr的比例大于1。

公开(公告)号：US06761982B2

公开(公告)日：2004-07-13

申请号：US10029153

申请日：2001-12-28

申请人： Akira Sakawaki ,  Hiroshi Sakai

发明人： Akira Sakawaki ,  Hiroshi Sakai

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90

摘要： A magnetic recording medium containing a non-magnetic substrate, an orientation-determining layer for causing the non-magnetic undercoat layer assume to have a predominant orientation plane of (200), a non-magnetic undercoat layer, a magnetic layer, and a protective layer, in order, is disclosed. The non-magnetic undercoat layer 3 has a bcc structure; the orientation-determining layer has a crystal structure in which columnar fine crystal grains are inclined in a radial direction; and the ratio of a coercive force in a circumferential direction of the magnetic layer (Hcc) to a coercive force in a radial direction of the magnetic layer 4 (Hcr)is more than 1. The magnetic layer includes a plurality of magnetic films and having an hcp structure and a predominant orientation plane of (110), and permits antiferromagnetic bonding to be formed therebetween.

摘要翻译： 含有非磁性基材的磁记录介质，用于使非磁性底涂层的取向决定层呈现为（200）的主要取向平面，非磁性底涂层，磁性层和保护层 层，按顺序被公开。 非磁性底涂层3具有bcc结构; 取向决定层具有柱状细晶粒沿径向倾斜的晶体结构， 并且磁性层（Hcc）的圆周方向的矫顽力与磁性层4的半径方向的矫顽力（Hcr）的比例大于1.磁性层包括多个磁性膜，并且具有 （110）的hcp结构和主要取向平面，并且允许在其间形成反铁磁结合。

公开(公告)号：US06582758B2

公开(公告)日：2003-06-24

申请号：US09810193

申请日：2001-03-19

申请人： Akira Sakawaki ,  Masato Kokubu ,  Ryuji Sakaguchi ,  Hiroshi Sakai

发明人： Akira Sakawaki ,  Masato Kokubu ,  Ryuji Sakaguchi ,  Hiroshi Sakai

IPC分类号： B05D512

CPC分类号： G11B5/8404 ,  G11B5/851 ,  Y10T428/12944 ,  Y10T428/24355 ,  Y10T428/265

摘要： An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.

摘要翻译： 本发明的目的是提供一种易于制造表现出优异的磁特性的磁记录介质的方法。 在本发明中，在经过纹理化的非金属基材上形成取向决定膜，取向决定膜进行氧化或氮化，在该金属基材上形成非磁性底涂膜和磁性膜 电影。

公开(公告)号：US06274233B1

公开(公告)日：2001-08-14

申请号：US09276466

申请日：1999-03-25

申请人： Toshihiko Yoshikawa ,  Akira Sakawaki ,  Hiroshi Sakai ,  Tetsuya Osaka

发明人： Toshihiko Yoshikawa ,  Akira Sakawaki ,  Hiroshi Sakai ,  Tetsuya Osaka

IPC分类号： G11B566

CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magnetic recording medium comprising a substrate 1 having thereon an in-plane magnetic film 3 having a magnetic easy axis oriented in the in-plane direction with respect to the substrate and a vertical magnetic film 6 having a magnetic easy axis oriented perpendicularly to the substrate. The in-plane magnetic film 3 is disposed closer to the substrate 1 than the vertical magnetic film 6. In preferred embodiments, the magnetic recording medium may further comprise a separation film 4 disposed between the in-plane magnetic film 3 and the vertical magnetic film 6, a nonmagnetic intermediate layer 5 having an hcp structure disposed between the separation film 4 and the vertical magnetic film 6, and a protective film 7. The magnetic recording medium is adapted for use with a signal processing system generally used for in-plane magnetic recording media without modification of the signal processing system.

摘要翻译： 一种磁记录介质，包括基板1，其上具有面向磁性薄膜3的平面磁性薄膜3，所述平面磁性薄膜3具有相对于基板在面内方向上定向的易磁化轴;垂直磁性膜6具有垂直于基板的易磁化轴 。 面内磁性膜3比垂直磁性膜6更靠近基板1.在优选实施例中，磁记录介质还可以包括设置在平面内的磁性膜3和垂直磁性膜之间的分离膜4 如图6所示，具有设置在分离膜4和垂直磁性膜6之间的hcp结构的非磁性中间层5和保护膜7.磁记录介质适用于通常用于面内磁性的信号处理系统 记录介质而不修改信号处理系统。

公开(公告)号：US06316062B1

公开(公告)日：2001-11-13

申请号：US09508836

申请日：2000-03-17

申请人： Ryuji Sakaguchi ,  Kazuo Kobayashi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kenichi Yoneyama ,  Kazunori Ohnami

发明人： Ryuji Sakaguchi ,  Kazuo Kobayashi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kenichi Yoneyama ,  Kazunori Ohnami

IPC分类号： H05H102

CPC分类号： G11B5/85 ,  C23C16/26 ,  G11B5/72 ,  G11B5/725 ,  G11B5/8408

摘要： The present invention provides a method for manufacturing a magnetic recording medium comprising the steps of forming a carbon protective film onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, using a reactant gas containing carbon atoms as a starting material, according to a plasma CVD method, wherein a mixed gas of hydrocarbon and hydrogen, in which the mixing ratio of hydrocarbon to hydrogen is in the range of 2 to 1˜1 to 100 by volume, is used as a reactant gas, during bias applying to said disc. In addition, the present invention provides a magnetic recording medium comprising a carbon protective film formed onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, wherein said carbon protective film is formed according to a plasma CVD method, while applying bias.

摘要翻译： 本发明提供一种制造磁记录介质的方法，包括以下步骤：在非磁性基板上用非磁性基膜和磁性薄膜层叠形成碳保护膜，使用含有 碳原子作为起始原料，根据等离子体CVD法，其中烃与氢的混合比在烃与氢的混合比在2至1至1至100的范围内的混合气体用作 在施加到所述盘的偏压期间反应气体。 此外，本发明提供一种磁记录介质，其包含形成在盘上的碳保护膜，其非磁性基板与非磁性基膜和磁性膜层叠，其中所述碳保护膜根据 等离子体CVD法，同时施加偏压。

公开(公告)号：US06663988B2

公开(公告)日：2003-12-16

申请号：US09842632

申请日：2001-04-27

申请人： Kenji Shimizu ,  Hiroshi Sakai

发明人： Kenji Shimizu ,  Hiroshi Sakai

IPC分类号： G11B566

CPC分类号： G11B5/656 ,  Y10S428/90

摘要： An object of the present invention is to provide a magnetic recording medium exhibiting excellent noise characteristics. On a substrate, an undercoat film is formed, and a perpendicular magnetic film, in which most of the easy-magnetization axes are oriented vertically with respect to the substrate, is formed on the undercoat film. A rocking curve 21 obtained through &thgr;-2 &thgr; scanning employing X-ray diffraction in relation to the magnetic film has a plurality of local maximum points 22 and 23.

摘要翻译： 本发明的目的是提供一种表现出优异噪声特性的磁记录介质。 在基材上形成底涂膜，在底涂膜上形成大部分易磁化轴相对于基板垂直取向的垂直磁性膜。 通过使用相对于磁性膜的X射线衍射的θ-2θ扫描获得的摇摆曲线21具有多个局部最大点22和23。

公开(公告)号：US06627301B2

公开(公告)日：2003-09-30

申请号：US09818942

申请日：2001-03-28

申请人： Kenji Shimizu ,  Akira Itoh ,  Hiroshi Sakai

发明人： Kenji Shimizu ,  Akira Itoh ,  Hiroshi Sakai

IPC分类号： G11B566

CPC分类号： G11B5/656 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12868 ,  Y10T428/12875 ,  Y10T428/12951 ,  Y10T428/24942

摘要： The present invention provides a magnetic recording medium exhibiting excellent noise characteristics and thermal stability. On a substrate, a first undercoat film, a first perpendicular magnetic film, a second undercoat film, a non-magnetic intermediate film, a second perpendicular magnetic film, and a protective film are successively formed, and the magnetic anisotropy energy of the first perpendicular magnetic film is higher than that of the second perpendicular magnetic film.

公开(公告)号：US08551911B2

公开(公告)日：2013-10-08

申请号：US13261235

申请日：2010-09-27

申请人： Hiroshi Sakai ,  Toshio Aihara ,  Satoshi Kodama ,  Shuntaro Kinoshita ,  Kazumi Jyujyo ,  Tadahiro Kondo

发明人： Hiroshi Sakai ,  Toshio Aihara ,  Satoshi Kodama ,  Shuntaro Kinoshita ,  Kazumi Jyujyo ,  Tadahiro Kondo

IPC分类号： B41M5/327 ,  B41M5/333 ,  B41M5/337

CPC分类号： B41M5/3335 ,  B41M5/323 ,  B41M2205/04

摘要： An object of the present invention is to provide a recording material or a recording sheet that is excellent in background and image stabilities and further excellent in color-developing sensitivity. The recording material of the present invention contains a color-forming compound, an additive, and at least one compound represented by formula (I) [wherein R1 and R4 each independently represent a C1-C6 alkyl group or the like; p represents 0 or any integer of 1 to 4; q represents 0 or any integer of 1 to 5; when p and q represents 2 or more, each of R1 and each of R4 are the same or different; R2 and R3 each independently represent a hydrogen atom or the like; R5 represents a hydrogen atom or the like; and the bond represented by the wavy line represents E, Z, or a mixture thereof].

摘要翻译： 本发明的目的是提供一种背景和图像稳定性优异且显色灵敏度优异的记录材料或记录片材。 本发明的记录材料包含成色化合物，添加剂和至少一种由式（I）表示的化合物[其中R 1和R 4各自独立地表示C 1 -C 6烷基等; p表示0或1〜4的整数， q表示0或1〜5的整数， 当p和q表示2或更大时，R 1和R 4各自相同或不同; R2和R3各自独立地表示氢原子等; R5表示氢原子等; 并且由波浪线表示的键表示E，Z或其混合物]。

公开(公告)号：US20120287526A1

公开(公告)日：2012-11-15

申请号：US13574141

申请日：2011-01-20

申请人： Shigeru Kasai ,  Yasuhiro Sasaki ,  Hiroshi Sakai

发明人： Shigeru Kasai ,  Yasuhiro Sasaki ,  Hiroshi Sakai

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B19/048 ,  G11B20/10027 ,  G11B20/10314 ,  G11B20/1816 ,  G11B27/36 ,  G11B2220/2516

摘要： A breakdown prediction device of the present invention includes: a vibration measurement unit that measures vibrations generated from a device being monitored; and a signal processing unit that performs breakdown prediction when a specific vibration is measured at the vibration measurement unit, a maximum vibration amplitude value of the vibration exceeding an upper limit vibration amplitude threshold, and a vibration amplitude value thereof being below a lower limit vibration amplitude threshold at a point in time when a specified time is reached from a point in time when the vibration exceeds the upper limit vibration amplitude threshold.

摘要翻译： 本发明的故障预测装置包括：振动测量单元，其测量从被监视的设备产生的振动; 以及信号处理单元，其在所述振动测量单元处测量特定振动时执行击穿预测，所​​述振动的最大振动振幅值超过上限振幅阈值，并且其振动振幅值低于下限振幅 在振动超过上限振幅阈值的时间点达到指定时间的时间点的阈值。