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1. 发明申请

US20090231751A1 METHOD AND APPARATUS FOR SERVO CONTROL ASSOCIATED WITH ROTATIONAL SPEED OF DISK IN DISK DRIVE 审中-公开
标题翻译：与磁盘驱动器中磁盘转速相关的伺服控制的方法和装置
公开(公告)号：US20090231751A1
公开(公告)日：2009-09-17
申请号：US12391047
申请日：2009-02-23
申请人： Makoto Asakura , Yuji Sakai , Shuuichi Kojima
发明人： Makoto Asakura , Yuji Sakai , Shuuichi Kojima
IPC分类号： G11B15/46
CPC分类号： G11B5/5552 , G11B5/596
摘要： According to one embodiment, a disk drive is disclosed to which a plurality of disk rotational speed modes can be set. The disk drive is configured such that input of servo data from servo sectors is thinned out by thinning out an output of an interrupt request to a CPU in a high-speed rotation mode. At the time, a disk controller obtains servo data reproduced from all the servo sectors at timing of servo gates and stores it to a register.
摘要翻译：根据一个实施例，公开了可以设置多个盘转速模式的盘驱动器。磁盘驱动器被配置为使得通过在高速旋转模式中将中断请求的输出稀疏到CPU来减少来自伺服扇区的伺服数据的输入。此时，磁盘控制器在伺服门的定时获得从所有伺服扇区再现的伺服数据，并将其存储到寄存器。

2. 发明申请

US20060007574A1 Perpendicular recording patterned disk medium and magnetic disk drive loaded with patterned disk medium 审中-公开
标题翻译：垂直记录图案磁盘介质和装有图案磁盘介质的磁盘驱动器
公开(公告)号：US20060007574A1
公开(公告)日：2006-01-12
申请号：US11180646
申请日：2005-07-14
申请人： Shuuichi Kojima , Makoto Asakura , Kotaro Yamamoto
发明人： Shuuichi Kojima , Makoto Asakura , Kotaro Yamamoto
IPC分类号： G11B5/09
CPC分类号： G11B5/59688 , G11B5/1278 , G11B5/59633
摘要： A patterned disk medium having a first surface and a second surface opposed to the first surface, includes a data pattern area formed in advance on each of the first surface and the second surface, a servo pattern area formed in advance like an arc in a radial direction, which divides the data pattern area in a plurality of pattern areas in a circumferential direction, and positioning marks formed used for positioning when the servo pattern area and the data pattern area are formed in advance.
摘要翻译：具有与第一表面相对的第一表面和第二表面的图案化的盘介质包括在第一表面和第二表面中的每一个上预先形成的数据图案区域，预先形成为径向的弧形的伺服图案区域方向，其在圆周方向上划分多个图案区域中的数据图案区域，以及当形成伺服图案区域和数据图案区域时形成的用于定位的定位标记。

3. 发明授权

US08432646B2 Magnetic detection element 有权
标题翻译：磁性检测元件
公开(公告)号：US08432646B2
公开(公告)日：2013-04-30
申请号：US12012635
申请日：2008-02-04
申请人： Shuuichi Kojima , Satoru Okamoto , Nobuo Yoshida , Katsuro Watanabe
发明人： Shuuichi Kojima , Satoru Okamoto , Nobuo Yoshida , Katsuro Watanabe
IPC分类号： G11B5/33
CPC分类号： G11B5/3163 , B82Y25/00 , G01R33/093 , G11B5/3932 , G11B5/398 , H01L43/12
摘要： Embodiments of the present invention help to reduce etching damage at end parts of a magnetoresistive sensor in ion beam etching. According to one embodiment, ion beam etching (IBE) is used in a magnetoresistive sensor track width forming step. This IBE irradiates Ar ion beam to a substrate in a state that the substrate is inclined and further rotates the substrate about its normal as a rotational axis. In a conventional track width forming step, the IBE irradiates the Ar ion beam to the substrate all the time while the IBE is rotating the substrate. By contrast, the IBE according to embodiments of the present invention irradiates the Ar ion beam to the substrate only in a predetermined specific angular range.
摘要翻译：本发明的实施例有助于减少离子束蚀刻中的磁阻传感器端部处的蚀刻损伤。根据一个实施例，在磁阻传感器轨道宽度形成步骤中使用离子束蚀刻（IBE）。该IBE在基板倾斜的状态下将Ar离子束照射到基板，并且进一步使基板围绕其正常旋转轴线旋转。在传统的轨道宽度形成步骤中，IBE在基板旋转的同时始终将Ar离子束照射到衬底上。相比之下，根据本发明的实施例的IBE仅在预定的特定角度范围内将Ar离子束照射到衬底。

4. 发明授权

US08355224B2 Sensor shape of a CPP magnetic head for improving the MR ratio 有权
标题翻译：用于改善MR比的CPP磁头的传感器形状
公开(公告)号：US08355224B2
公开(公告)日：2013-01-15
申请号：US12011904
申请日：2008-01-29
申请人： Satoru Okamoto , Koji Okazaki , Shuuichi Kojima , Nobuo Yoshida , Katsuro Watanabe , Hiroyuki Katada
发明人： Satoru Okamoto , Koji Okazaki , Shuuichi Kojima , Nobuo Yoshida , Katsuro Watanabe , Hiroyuki Katada
IPC分类号： G11B5/33
CPC分类号： G11B5/398 , B82Y25/00 , G01R33/093 , G11B5/3163 , H01L43/08
摘要： Embodiments of the present invention help to prevent a head characteristic from being deteriorated by re-deposition or damage which occurs when a sensor film is etched, a track width is narrowed, and the head characteristic is stabilized. According to one embodiment, when it is assumed that the thickness of the sensor film on an air bearing surface is T, and a distance between an end of a medium layer that is interposed between a free layer and a pinned layer which comprise the sensor film and an end of the sensor film lowest portion, a relationship of 1.2×T≦X≦2.5×T is satisfied, and the ends of a pair of magnetic films which are in contact with both sides in the track-width direction through an insulator do not exist in the track central portion from the free layer end. The sensor film is etched while an incident angle of an etching beam is changed over, and when it is assumed that a direction normal to the sensor film surface is the incident angle of 0, etching is conducted under the condition where the incident angle of the etching beam becomes smaller with time.
摘要翻译：本发明的实施例有助于通过在传感器膜被蚀刻，轨道宽度变窄并且头部特性稳定时发生的再沉积或损伤来防止头部特性劣化。根据一个实施例，当假设空气轴承表面上的传感器膜的厚度为T时，介于介于包含传感器膜的自由层和被钉扎层之间的介质层的端部之间的距离和传感器膜最低部分的一端，满足1.2×T＆nlE; X＆nlE; 2.5×T的关系，并且通过绝缘体在轨道宽度方向上与两侧接触的一对磁性膜的端部不存在于自由层末端的轨道中心部分。在蚀刻光束的入射角变化的同时蚀刻传感器膜，并且当假定与传感器膜表面垂直的方向为入射角为0时，在其入射角刻蚀光束随时间变小。

5. 发明申请

US20090154000A1 METHOD AND APPARATUS FOR WRITING DATA WITH SEQUENTIAL ACCESS IN A DISK DRIVE 审中-公开
标题翻译：用于在磁盘驱动器中以数字访问方式写入数据的方法和装置
公开(公告)号：US20090154000A1
公开(公告)日：2009-06-18
申请号：US12245494
申请日：2008-10-03
申请人： Shuuichi Kojima
发明人： Shuuichi Kojima
IPC分类号： G11B15/18
CPC分类号： G11B5/02
摘要： According to one embodiment, a disk drive has a disk, a controller, and a flash memory, the request data to be recorded in the disk may be continuous data. In this case, the first one-track data item including the head address of the requested data is stored in the flash memory, and the second to last one-track data items are sequentially written in the disk.
摘要翻译：根据一个实施例，盘驱动器具有盘，控制器和闪存，要记录在盘中的请求数据可以是连续数据。在这种情况下，包括所请求数据的头地址的第一单轨数据项被存储在闪速存储器中，并且第二到最后一个轨道数据项被顺序写入盘中。

6. 发明申请

US20090046394A1 Sensor shape and etching process of CPP magnetic head for reduce property degradation 有权
标题翻译： CPP磁头的传感器形状和蚀刻工艺，用于降低性能下降
公开(公告)号：US20090046394A1
公开(公告)日：2009-02-19
申请号：US12011904
申请日：2008-01-29
申请人： Satoru Okamoto , Koji Okazaki , Shuuichi Kojima , Nobuo Yoshida , Katsuro Watanabe , Hiroyuki Katada
发明人： Satoru Okamoto , Koji Okazaki , Shuuichi Kojima , Nobuo Yoshida , Katsuro Watanabe , Hiroyuki Katada
IPC分类号： G11B5/33 , B44C1/22
CPC分类号： G11B5/398 , B82Y25/00 , G01R33/093 , G11B5/3163 , H01L43/08
摘要： Embodiments of the present invention help to prevent a head characteristic from being deteriorated by re-deposition or damage which occurs when a sensor film is etched, a track width is narrowed, and the head characteristic is stabilized. According to one embodiment, when it is assumed that the thickness of the sensor film on an air bearing surface is T, and a distance between an end of a medium layer that is interposed between a free layer and a pinned layer which comprise the sensor film and an end of the sensor film lowest portion, a relationship of 1.2×T≦x≦2.5×T is satisfied, and the ends of a pair of magnetic films which are in contact with both sides in the track-width direction through an insulator do not exist in the track central portion from the free layer end. The sensor film is etched while an incident angle of an etching beam is changed over, and when it is assumed that a direction normal to the sensor film surface is the incident angle of 0, etching is conducted under the condition where the incident angle of the etching beam becomes smaller with time.
摘要翻译：本发明的实施例有助于通过在传感器膜被蚀刻，轨道宽度变窄并且头部特性稳定时发生的再沉积或损伤来防止头部特性劣化。根据一个实施例，当假设空气轴承表面上的传感器膜的厚度为T时，介于介于包含传感器膜的自由层和被钉扎层之间的介质层的端部之间的距离和传感器膜最低部分的端部，满足1.2×T <= x <= 2.5×T的关系，并且通过绝缘体在轨道宽度方向上与两侧接触的一对磁性膜的端部不存在于自由层末端的轨道中心部分。在蚀刻光束的入射角变化的同时蚀刻传感器膜，并且当假定与传感器膜表面垂直的方向为入射角为0时，在其入射角刻蚀光束随时间变小。

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