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21. 发明授权

US06270885B1 Perpendicular magnetic recording medium 失效
标题翻译：垂直磁记录介质
公开(公告)号：US06270885B1
公开(公告)日：2001-08-07
申请号：US09193730
申请日：1998-11-17
申请人： Hirotaka Hokkyo , Shinzo Tsuboi , Katsumichi Tagami
发明人： Hirotaka Hokkyo , Shinzo Tsuboi , Katsumichi Tagami
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/265
摘要： In a perpendicular magnetic recording medium, a soft magnetic film playing the role of an back layer, but not having a domain wall structure, is positioned beneath a perpendicular magnetization film. Such a back layer improves the envelope characteristic of the medium at the time of recording and reproduction. Moreover, the medium is free from spike noise and the decrease or cancellation of recorded magnetization ascribable to the movement of the domain wall of a back layer. The medium of the present invention is therefore a drastic solution to the problems particular to a conventional perpendicular magnetic recording medium and realizes desirable recording and reproducing characteristics.
摘要翻译：在垂直磁记录介质中，具有背层但不具有畴壁结构的软磁膜位于垂直磁化膜的下方。这种背层改善了记录和再现时介质的包络特性。此外，介质没有尖峰噪声，并且归因于后层的畴壁的移动的记录磁化的减小或消除。因此，本发明的介质是对常规垂直磁记录介质特有的问题的极大的解决方案，并实现期望的记录和再现特性。

22. 发明授权

US07824584B2 Method of manufacturing stamper, method of manufacturing resin molded article, and stamper 失效
标题翻译：制造压模的方法，制造树脂模制品的方法和压模
公开(公告)号：US07824584B2
公开(公告)日：2010-11-02
申请号：US12435465
申请日：2009-05-05
申请人： Yuuichi Kawaguchi , Shuichi Okawa , Katsumichi Tagami
发明人： Yuuichi Kawaguchi , Shuichi Okawa , Katsumichi Tagami
IPC分类号： B32B3/00 , G11B7/26
CPC分类号： B29C45/2632 , G11B5/82 , G11B5/855 , G11B5/865 , G11B7/263 , Y10S425/81 , Y10T428/24612
摘要： A stamper manufacturing method comprises: forming a stamper body so as to have a concave/convex pattern on one surface and a crystalline structure on at least a side toward the other surface; forming a layer having an amorphous structure on the other surface side of the stamper body; and polishing a surface of the layer having the amorphous structure. A resin molded article manufacturing method includes an injection molding process using the stamper as a prototype so as to transfer the concave/convex pattern of the stamper to a resin material. A stamper comprises a stamper body which is formed so as to have a concave/convex pattern on one surface and have a crystalline structure on at least a side toward the other surface. In the stamper, a layer having an amorphous structure and a surface of which is polished is formed on the other surface side of the stamper body.
摘要翻译：压模制造方法包括：在一个表面上形成具有凹凸图案的压模体，并且至少朝向另一个表面的一侧形成晶体结构; 在压模体的另一表面侧形成具有非晶结构的层; 并抛光具有非晶结构的层的表面。树脂模制品制造方法包括使用压模作为原型的注射成型工艺，以将压模的凹凸图案转印到树脂材料上。压模包括：压模体，其形成为在一个表面上具有凹凸图案，并且在朝向另一个表面的至少一侧具有晶体结构。在压模中，在压模体的另一个表面侧形成具有非晶结构并且其表面被抛光的层。

23. 发明授权

US07746598B2 Information recording medium and recording/reproducing apparatus 有权
标题翻译：信息记录介质和记录/再现装置
公开(公告)号：US07746598B2
公开(公告)日：2010-06-29
申请号：US11225185
申请日：2005-09-14
申请人： Makoto Moriya , Katsumichi Tagami
发明人： Makoto Moriya , Katsumichi Tagami
IPC分类号： G11B5/82 , G11B7/24 , G11B7/00 , G11B23/03
CPC分类号： G11B5/59655 , B82Y10/00 , G11B5/743 , G11B5/855
摘要： An information recording medium excellent in surface smoothness. The information recording medium has a data track pattern and a servo pattern formed on at least one surface of a substrate by a concave/convex pattern including a plurality of convex portions. The concave/convex pattern has concave portions each having a non-magnetic material embedded therein. An A concave/convex pattern forming the servo pattern includes a plurality of servo convex portions formed in a manner associated with servo data. At least part of the plurality of servo convex portions are formed by a B concave/convex pattern including a plurality of non-servo convex portions. This arrangement makes it possible to maintain excellent surface smoothness within a servo pattern area, thereby enabling the recording/reproducing apparatus to execute stable recording and reproducing on and from the information recording medium.
摘要翻译：表面平滑性优异的信息记录媒体。信息记录介质具有通过包括多个凸部的凹凸图案形成在基板的至少一个表面上的数据轨迹图案和伺服图案。凹凸图案具有嵌入其中的非磁性材料的凹部。形成伺服图案的凹凸图案包括以与伺服数据相关联的方式形成的多个伺服凸部。多个伺服凸部的至少一部分由包括多个非伺服凸部的B凹凸图案形成。这种布置使得可以在伺服图案区域内保持优异的表面平滑度，从而使得记录/再现装置能够在信息记录介质上执行稳定的记录和再现。

24. 发明授权

US07697323B2 Magnetic storage device 失效
标题翻译：磁存储装置
公开(公告)号：US07697323B2
公开(公告)日：2010-04-13
申请号：US11823063
申请日：2007-06-25
申请人： Katsumichi Tagami , Keiji Koga , Tohru Oikawa
发明人： Katsumichi Tagami , Keiji Koga , Tohru Oikawa
IPC分类号： G11C11/00
CPC分类号： G11C11/16
摘要： A magnetic storage device is provided which has significantly reduced power consumption. The magnetic storage device includes: a yoke which is arranged so as to cover part of a line extending in an arbitrary direction; and a magneto-resistive element which is arranged near the line and is capable of writing information using a field occurring from the line. The magnetic storage device is set to satisfy the equation Iw≦a·R+b, where Iw is the write current necessary for the line, R is the magnetoresistance of the yoke, a (mA·H)=7.5E−11, and b (mA)=0.1.
摘要翻译：提供了一种显着降低功耗的磁存储装置。磁存储装置包括：轭，被布置成覆盖沿任意方向延伸的线的一部分; 以及布置在线路附近并且能够使用从线路发生的场来写入信息的磁阻元件。磁存储装置被设定为满足方程式Iw＆nlE; a·R + b，其中Iw是线路所需的写入电流，R是磁轭的磁阻，a（mA·H）= 7.5E-11，以及 b（mA）= 0.1。

25. 发明授权

US07613033B2 Magnetic storage device 失效
标题翻译：磁存储装置
公开(公告)号：US07613033B2
公开(公告)日：2009-11-03
申请号：US11881305
申请日：2007-07-26
申请人： Keiji Koga , Katsumichi Tagami , Tohru Oiakawa
发明人： Keiji Koga , Katsumichi Tagami , Tohru Oiakawa
IPC分类号： G11C11/00
CPC分类号： H01L27/228 , B82Y10/00 , G11C11/161 , G11C11/1655 , G11C11/1657 , G11C11/1659 , G11C11/1673 , G11C11/1675
摘要： A magnetic storage device is provided which has significantly reduced power consumption. In the magnetic storage device, a yoke is arranged so as to circumferentially surround part of a line extending in an arbitrary direction, and a magneto-resistive element to which information can be written by utilizing a magnetic field generated by the line is arranged in the vicinity of the line. In this case, the length of the magnetic path of the yoke is set to 6 μm or less.
摘要翻译：提供了一种显着降低功耗的磁存储装置。在磁存储装置中，磁轭被布置为周向地包围沿任意方向延伸的线的一部分，并且通过利用由线产生的磁场可以写入信息的磁阻元件被布置在线附近。在这种情况下，轭的磁路长度设定为6μm以下。

26. 发明授权

US07443633B2 Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic head 有权
标题翻译：用于垂直磁记录的薄膜磁头和薄膜磁头的制造方法
公开(公告)号：US07443633B2
公开(公告)日：2008-10-28
申请号：US11300277
申请日：2005-12-15
申请人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
发明人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1872
摘要： A thin-film magnetic head with which an error rate is decreased due to a reduction of a jitter without significant decrease in write field, is provided. The head comprises at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface, toward a center portion in the track-width direction of a trailing end surface; an auxiliary magnetic pole layer; and at least one coil layer, a curvature width WC of a contour line of a write field adjacent to a trailing edge on an ABS side of the main magnetic pole layer satisfying the following expression: −0.15*WT≦WC
摘要翻译：提供了一种薄膜磁头，其由于抖动的减小而不会在写入场中显着降低而误差率降低。头包括至少一个感应写头元件，包括：主磁极层，具有从轨道宽度方向和前端表面的两个侧端面朝着轨道宽度方向的中心部分变化的内部饱和磁通密度，后端面的宽度方向; 辅助磁极层; 以及至少一个线圈层，与主磁极层的ABS侧的后缘相邻的写入场的轮廓线的曲率宽度W C C满足以下表达式：-0.15 * 其中W T是轨道宽度，W C的单位和 W N是纳米。

27. 发明申请

US20080144227A1 Magnetic storage device 失效
标题翻译：磁存储装置
公开(公告)号：US20080144227A1
公开(公告)日：2008-06-19
申请号：US12002253
申请日：2007-12-14
申请人： Keiji Koga , Katsumichi Tagami , Tohru Oikawa
发明人： Keiji Koga , Katsumichi Tagami , Tohru Oikawa
IPC分类号： G11B5/127
CPC分类号： G11C11/16
摘要： A magnetic storage device with a significant reduction in power consumption. The magnetic storage device includes: a yoke which is arranged to cover part of a line extending in an arbitrary direction; and a magneto-resistive element which is arranged in contact with the yoke, thereby forming a closed magnetic circuit. The magneto-resistive element is capable of writing information with a field emanating from the yoke. The magnetic storage device satisfies Iw≦a·R, where R is the magnetoresistance of the yoke, Iw is the write current necessary for the line, and a (mA·H)=6E−11.
摘要翻译：具有显着降低功耗的磁存储装置。磁存储装置包括：轭，被布置成覆盖沿任意方向延伸的线的一部分; 和与磁轭接触的磁阻元件，从而形成闭合磁路。磁阻元件能够用从磁轭发出的磁场来写入信息。磁存储器件满足Iw <= a.R，其中R是磁轭的磁阻，Iw是线所需的写入电流，a（mA.H）= 6E-11。

28. 发明授权

US07090934B2 Perpendicular magnetic recording medium 有权
公开(公告)号：US07090934B2
公开(公告)日：2006-08-15
申请号：US10141446
申请日：2002-05-08
申请人： Hirotaka Hokkyo , Shinzo Tsuboi , Katsumichi Tagami
发明人： Hirotaka Hokkyo , Shinzo Tsuboi , Katsumichi Tagami
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/653 , G11B5/66 , Y10S428/90 , Y10T428/24942 , Y10T428/264
摘要： The present invention provides a perpendicular magnetic recording medium 11 having a perpendicular magnetization film 22 formed on a substrate 20, wherein a high perpendicular orientation film 24 having higher perpendicular orientation than that of the perpendicular magnetization film 22 is formed over or/and under the perpendicular magnetization film 22.

29. 发明申请

US20060066984A1 Magnetic recording and reproducing apparatus 失效
标题翻译：磁记录和再现设备
公开(公告)号：US20060066984A1
公开(公告)日：2006-03-30
申请号：US11136372
申请日：2005-05-25
申请人： Katsumichi Tagami
发明人： Katsumichi Tagami
IPC分类号： G11B21/02 , G11B5/09
CPC分类号： B82Y10/00 , G11B5/1278 , G11B5/1872 , G11B5/5539 , G11B5/743 , G11B5/82
摘要： A magnetic recording and reproducing apparatus includes a magnetic head having a main magnetic pole, a magnetic recording medium of a discrete type having a predetermined convex-concave structure at data tracks and servo tracks, and a drive device body that can operate to rotationally drive the magnetic recording medium in a constant direction and cause the magnetic head to be movable in substantially radial directions of the magnetic recording medium. A relationship among parameters specifying a predetermined convex-concave shape of the data track, parameters specifying the main magnetic pole, and a skew angle is defined by a predetermined inequality. By setting a specification of the magnetic recording and reproducing apparatus in the range defined by the inequality, it is possible to prevent unwanted writing into the adjacent track to thereby realize high-density recording having extremely high reliability.
摘要翻译：一种磁记录和再现装置，包括具有主磁极的磁头，在数据磁道和伺服磁道上具有预定的凸凹结构的分立型磁记录介质，以及驱动装置本体，可驱动旋转驱动磁记录介质，并使磁头能够在磁记录介质的大致半径方向上移动。通过预定的不等式定义指定数据轨道的预定凸凹形状的参数之间的关系，指定主磁极的参数和倾斜角度之间的关系。通过在由不等式限定的范围内设定磁记录和再现装置的规格，可以防止对相邻轨道的不希望的写入，从而实现具有极高可靠性的高密度记录。

30. 发明申请

US20060023329A1 Magnetic recording and reproducing apparatus 失效
标题翻译：磁记录和再现设备
公开(公告)号：US20060023329A1
公开(公告)日：2006-02-02
申请号：US11113199
申请日：2005-04-25
申请人： Katsumichi Tagami
发明人： Katsumichi Tagami
IPC分类号： G11B5/09
CPC分类号： G11B5/855 , B82Y10/00 , G11B5/1278 , G11B5/743 , G11B5/82
摘要： In the present invention, with respect to a convex-concave structure necessary for respective functions of a servo area in a perpendicular magnetic recording medium, a specification of configuration and magnetic property of a convex-concave magnetic layer of the perpendicular magnetic recording medium is set so as to overcome a demagnetizing field that accelerates thermal fluctuation. Therefore, in a magnetic recording and reproducing apparatus using the perpendicular magnetic recording medium having servo tracking signals at convex portions of the magnetic layer formed in a convex-concave pattern, it is possible to suppress degradation of the servo signals caused by the thermal fluctuation to thereby ensure a stable servo function over the long term.
摘要翻译：在本发明中，对于垂直磁记录介质中的伺服区域的各功能所需的凸凹结构，设定垂直磁记录介质的凸凹磁性层的结构和磁特性的规定以克服加速热波动的退磁场。因此，在使用在凸凹图案形成的磁性层的凸部处具有伺服跟踪信号的垂直磁记录介质的磁记录和再现装置中，可以抑制由热波动引起的伺服信号的劣化从而确保长期稳定的伺服功能。

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