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1. 发明授权

US07990653B2 Perpendicular recording magnetic head with a main magnetic pole piece and an auxiliary magnetic pole piece 有权
标题翻译：垂直记录磁头，带有主磁极片和辅助磁极片
公开(公告)号：US07990653B2
公开(公告)日：2011-08-02
申请号：US11796196
申请日：2007-04-27
申请人： Masafumi Mochizuki , Shuji Nishida , Kimitoshi Etoh , Isao Nunokawa
发明人： Masafumi Mochizuki , Shuji Nishida , Kimitoshi Etoh , Isao Nunokawa
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： Embodiments in accordance with the present invention provide a perpendicular recording magnetic head whose dimensional dependency on the nonuniformity of magnetic field strength and distribution during manufacture is minimized, with narrowed tracks and without attenuation or erasure of adjacent track data while maintaining high magnetic field strength. According to one embodiment, a magnetic material (trailing/side shield) for creating a steep gradient of magnetic field strength is provided at a trailing side of a pole tip of a main magnetic pole piece and in a direction of the track width. The magnetic head is formed so that a gap (side gap length “gl”) between a side shield and a throat height portion of the pole tip progressively decreases with an increasing distance from an air-bearing surface, in a direction of an element height. That is, side gap length “gl” (2) at an element height position P2 is made smaller than side gap length “gl” (1) at an air-bearing surface position P1 so as to satisfy a relationship of gl(1)>gl(2).
摘要翻译：根据本发明的实施例提供一种垂直记录磁头，其在制造期间对磁场强度和分布的不均匀性的尺寸依赖性被最小化，具有变窄的轨迹，并且在保持高磁场强度的同时没有相邻轨道数据的衰减或擦除。根据一个实施例，用于产生陡峭磁场强度梯度的磁性材料（尾部/侧面屏蔽）设置在主磁极片的磁极尖端的后侧和磁道宽度的方向上。磁头形成为使得侧挡板和极尖端的喉部高度部分之间的间隙（侧隙长度“gl”）随着与空气轴承表面的距离的增加而逐渐减小，元件高度方向。也就是说，使元件高度位置P2处的侧面间隙长度“gl”（2）在空气轴承表面位置P1处小于侧面间隙长度“gl”（1），以满足gl（1） > gl（2）。

2. 发明申请

US20070253107A1 Perpendicular recording magnetic head 有权
标题翻译：垂直记录磁头
公开(公告)号：US20070253107A1
公开(公告)日：2007-11-01
申请号：US11796196
申请日：2007-04-27
申请人： Masafumi Mochizuki , Shuji Nishida , Kimitoshi Etoh , Isao Nunokawa
发明人： Masafumi Mochizuki , Shuji Nishida , Kimitoshi Etoh , Isao Nunokawa
IPC分类号： G11B5/147
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： Embodiments in accordance with the present invention provide a perpendicular recording magnetic head whose dimensional dependency on the nonuniformity of magnetic field strength and distribution during manufacture is minimized, with narrowed tracks and without attenuation or erasure of adjacent track data while maintaining high magnetic field strength. According to one embodiment, a magnetic material (trailing/side shield) for creating a steep gradient of magnetic field strength is provided at a trailing side of a pole tip of a main magnetic pole piece and in a direction of the track width. The magnetic head is formed so that a gap (side gap length “gl”) between a side shield and a throat height portion of the pole tip progressively decreases with an increasing distance from an air-bearing surface, in a direction of an element height. That is, side gap length “gl” (2) at an element height position P2 is made smaller than side gap length “gl” (1) at an air-bearing surface position P1 so as to satisfy a relationship of gl(1)>gl(2).
摘要翻译：根据本发明的实施例提供一种垂直记录磁头，其在制造期间对磁场强度和分布的不均匀性的尺寸依赖性被最小化，具有变窄的轨迹，并且在保持高磁场强度的同时没有相邻轨道数据的衰减或擦除。根据一个实施例，用于产生陡峭磁场强度梯度的磁性材料（尾部/侧面屏蔽）设置在主磁极片的磁极尖端的后侧和磁道宽度的方向上。磁头形成为使得侧挡板和极尖端的喉部高度部分之间的间隙（侧隙长度“gl”）随着与空气轴承表面的距离的增加而逐渐减小，元件高度方向。也就是说，使元件高度位置P 2处的侧面间隙长度“gl”（2）在空气轴承表面位置P 1处小于侧面间隙长度“gl”（1），以满足gl（ 1）> gl（2）。

3. 发明授权

US08861116B2 Track pitch variation measurement method using spiral DC pattern writing 有权
标题翻译：使用螺旋直流图案写入的轨距变化测量方法
公开(公告)号：US08861116B2
公开(公告)日：2014-10-14
申请号：US13196022
申请日：2011-08-02
申请人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
发明人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
IPC分类号： G11B5/09 , G11B15/46 , G11B21/02 , G11B5/82 , G11B5/596 , G11B5/74
CPC分类号： G11B5/743 , G11B5/59627 , G11B5/59661
摘要： In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a radial direction of the magnetic disk medium while rotating the magnetic disk medium, reading the magnetic disk medium while moving the magnetic head in the direction about parallel to the radial direction of the magnetic disk medium while rotating the magnetic disk medium, and calculating a track pitch interval between data tracks of the magnetic disk medium based on the reading of the magnetic disk medium. In another embodiment, a magnetic disk medium includes a DC spiral pattern in a radial region further outward and/or a radial region further inward than a radial region where data is recorded.
摘要翻译：在一个实施例中，一种方法包括使用磁头的写入器将DC图案螺旋写入到磁盘介质上，同时在旋转磁盘介质的同时在大致平行于磁盘介质的径向的方向上移动磁头，在旋转磁盘介质的同时沿着与磁盘介质的径向大致平行的方向移动磁头的同时读取磁盘介质，并且基于读取磁盘介质计算磁盘介质的数据磁道之间的磁道间距间隔磁盘介质。在另一个实施例中，磁盘介质包括在径向区域中进一步向内和/或径向区域的直流螺旋图案，该径向区域比记录数据的径向区域更内侧。

4. 发明授权

US08339749B2 Perpendicular magnetic recording head, magnetic head, and magnetic disk device mounted with these heads 有权
标题翻译：垂直磁记录头，磁头和安装这些磁头的磁盘装置
公开(公告)号：US08339749B2
公开(公告)日：2012-12-25
申请号：US12313410
申请日：2008-11-19
申请人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
发明人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
IPC分类号： G02B5/32 , G02F1/00
CPC分类号： G11B5/3116 , B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3909 , G11B5/3967 , G11B2005/3996
摘要： Embodiments of the invention reduce generation of a magnetic field with a polarity reverse to that of the recording magnetic field, without deteriorating a gradient in the magnetic field. An embodiment of a magnetic disk device according to the present invention suppresses deviation and erase of already recorded data. In an embodiment, the perpendicular magnetic recording head includes the main magnetic pole, an auxiliary magnetic pole, a trailing shield disposed on the trailing side of the main magnetic pole with a non-magnetic film placed in-between, and side shields disposed on both the sides of the main magnetic pole in the direction of the track width with a non-magnetic film placed in-between. The trailing shield has on the trailing side a portion where film thickness is thinner on the trailing side than the thickness of its element in the height direction in its position facing the main magnetic pole. Adoption of this configuration allows suppression of generation of the magnetic field having a polarity reverse to that of the recording magnetic field, without deteriorating the magnetic field gradient. Also in the portion where the side shields face the main magnetic pole, the side shields have the portion where the film is thinned down in thickness.
摘要翻译：本发明的实施例减少了与记录磁场相反极性的磁场的产生，而不会使磁场中的梯度恶化。根据本发明的磁盘装置的实施例抑制已经记录的数据的偏差和擦除。在一个实施例中，垂直磁记录头包括主磁极，辅助磁极，设置在主磁极的后侧的后屏蔽件，其中放置有非磁性薄膜和设置在两者上的侧屏蔽主磁极的侧面在磁道宽度方向上放置非磁性膜。后挡板在其后侧具有在其后侧的膜厚度比其元件在其与主磁极相对的位置的高度方向上的厚度更薄的部分。采用这种配置允许抑制具有与记录磁场相反的极性的磁场的产生，而不会降低磁场梯度。另外在侧面屏蔽面对主磁极的部分，侧面屏蔽部分的薄膜部分厚度变薄。

5. 发明授权

US07944646B2 Magnetic disk drive 有权
标题翻译：磁盘驱动器
公开(公告)号：US07944646B2
公开(公告)日：2011-05-17
申请号：US12008276
申请日：2008-01-09
申请人： Masafumi Mochizuki , Yukiya Shimizu , Shuji Nishida
发明人： Masafumi Mochizuki , Yukiya Shimizu , Shuji Nishida
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/743 , G11B5/855
摘要： In a patterned perpendicular magnetic recording medium, embodiments of the present invention provide a magnetic head in which magnetic field to be applied to adjacent tracks can be suppressed and a recording device equipped with the magnetic head. In one embodiment of the present invention, a sum of a width Pw of a main pole of a magnetic head and distances between right and left magnetic substances on a width-directional side of tracks and the main pole, so-called widths of side gap lengths s_g1—1 and s_g1—2 is, in a magnetic recording medium having a soft-magnetic underlayer, made to be not more than a sum of a width w_land of a convexity or land of the soft-magnetic underlayer and widths w_groove—1 and w_groove—2 of concavities or grooves adjacent to the land on both its sides.
摘要翻译：在图案化的垂直磁记录介质中，本发明的实施例提供了一种可以抑制施加到相邻轨道的磁场的磁头和配备有磁头的记录装置。在本发明的一个实施例中，磁头的主极的宽度Pw与轨道的宽度方向上的左右磁性物质与主极之间的距离之和，所谓的侧面间隙的宽度长度s_g1-1和s_g1-2在具有软磁性底层的磁记录介质中被制成不大于软磁性底层的凸面或平面的宽度w_land与宽度w_沟槽-1的和和两边的土地相邻的凹槽或凹槽的w_沟槽2。

6. 发明申请

US20090161263A1 Magnetic head and magnetic disk apparatus 有权
标题翻译：磁头和磁盘设备
公开(公告)号：US20090161263A1
公开(公告)日：2009-06-25
申请号：US12315523
申请日：2008-12-03
申请人： Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
发明人： Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
IPC分类号： G11B5/33
CPC分类号： G11B5/3166 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3169 , Y10T428/1171 , Y10T428/1193
摘要： Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.
摘要翻译：本发明的实施例提供一种用于垂直磁记录的磁头，以及能够防止由对准标记引起的数据擦除的磁盘装置。在一个实施例中，磁头包括头元件，头元件至少包括在飞行表面上具有极面的主极和辅助极; 由磁性材料制成的对准标记，用于在研磨主极的极面时检测研磨作业的数量; 以及由磁性材料制成的构件，其在相对于主极的位置的任一方向上从对准标记内部至少超过对准标记向外延伸。

7. 发明申请

US20090168241A1 Magnetic disk drive 审中-公开
标题翻译：磁盘驱动器
公开(公告)号：US20090168241A1
公开(公告)日：2009-07-02
申请号：US12315810
申请日：2008-12-04
申请人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
发明人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278
摘要： Embodiments of the present invention help to inhibit record information in a perpendicular magnetic recording disk drive from being attenuated or erased due to leakage of a recording magnetic field into the already-recorded information. According to one embodiment, a magnetic disk includes a soft magnetic underlayer and a magnetic recording layer. A magnetic head includes a main magnetic pole, an auxiliary magnetic pole, a trailing shield which is disposed via a non-magnetic film on a trailing side of the main magnetic pole and in which a reverse side is in contact with the auxiliary magnetic pole, and side shields disposed on both sides of the main magnetic pole. Herein, where a saturation magnetic flux density of the soft magnetic underlayer is BsSUL and a film thickness thereof is tSUL; a saturation magnetic flux density of the trailing shield and side shields is Bsshield and a film thickness thereof is tshield; and the number of sides of the trailing shield and the side shields, which sides oppose the main magnetic pole, is C1, conditions are set so as to satisfy the following expression: BsSUL×tSUL>(1/C1)×Bsshield×tshield.
摘要翻译：本发明的实施例有助于阻止垂直磁记录盘驱动器中的记录信息由于记录磁场泄漏到已经记录的信息而被衰减或擦除。根据一个实施例，磁盘包括软磁性底层和磁记录层。磁头包括主磁极，辅助磁极，后屏蔽，其经由主磁极的后侧上的非磁性膜设置，并且反向侧与辅助磁极接触，以及设置在主磁极两侧的侧屏蔽。这里，软磁性底层的饱和磁通密度为BsSUL，膜厚为tSUL的情况下，后屏蔽和侧屏蔽的饱和磁通密度为Bsshield，其膜厚为tshield; 并且后屏蔽和侧屏蔽的与主磁极相对的侧面的数量为C1，条件被设置为满足以下表达式：<？in-line-formula description =“在线公式 “end =”lead“？> BsSxtxtSUL>（1 / C1）xBsshieldxtshield。<？in-line-formula description =”In-line Formulas“end =”tail“？>

8. 发明申请

US20090154012A1 Perpendicular magnetic recording head, magnetic head, and magnetic disk device mounted with these heads 有权
标题翻译：垂直磁记录头，磁头和安装这些磁头的磁盘装置
公开(公告)号：US20090154012A1
公开(公告)日：2009-06-18
申请号：US12313410
申请日：2008-11-19
申请人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
发明人： Masafumi Mochizuki , Hideaki Maeda , Shuji Nishida , Takaaki Izumida
IPC分类号： G11B5/10
CPC分类号： G11B5/3116 , B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3909 , G11B5/3967 , G11B2005/3996
摘要： Embodiments of the invention reduce generation of a magnetic field with a polarity reverse to that of the recording magnetic field, without deteriorating a gradient in the magnetic field. An embodiment of a magnetic disk device according to the present invention suppresses deviation and erase of already recorded data. In an embodiment, the perpendicular magnetic recording head includes the main magnetic pole, an auxiliary magnetic pole, a trailing shield disposed on the trailing side of the main magnetic pole with a non-magnetic film placed in-between, and side shields disposed on both the sides of the main magnetic pole in the direction of the track width with a non-magnetic film placed in-between. The trailing shield has on the trailing side a portion where film thickness is thinner on the trailing side than the thickness of its element in the height direction in its position facing the main magnetic pole. Adoption of this configuration allows suppression of generation of the magnetic field having a polarity reverse to that of the recording magnetic field, without deteriorating the magnetic field gradient. Also in the portion where the side shields face the main magnetic pole, the side shields have the portion where the film is thinned down in thickness.
摘要翻译：本发明的实施例减少了与记录磁场相反极性的磁场的产生，而不会使磁场中的梯度恶化。根据本发明的磁盘装置的实施例抑制已经记录的数据的偏差和擦除。在一个实施例中，垂直磁记录头包括主磁极，辅助磁极，设置在主磁极的后侧的后屏蔽件，其中放置有非磁性薄膜和设置在两者上的侧屏蔽主磁极的侧面在磁道宽度方向上放置非磁性膜。后挡板在其后侧具有在其后侧的膜厚度比其元件在其与主磁极相对的位置的高度方向上的厚度更薄的部分。采用这种配置允许抑制具有与记录磁场相反的极性的磁场的产生，而不会降低磁场梯度。另外在侧面屏蔽面对主磁极的部分，侧面屏蔽部分的薄膜部分厚度变薄。

9. 发明授权

US08717708B2 Magnetic head and magnetic disk apparatus 有权
标题翻译：磁头和磁盘设备
公开(公告)号：US08717708B2
公开(公告)日：2014-05-06
申请号：US12315523
申请日：2008-12-03
申请人： Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
发明人： Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
IPC分类号： G11B5/127
CPC分类号： G11B5/3166 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3169 , Y10T428/1171 , Y10T428/1193
摘要： Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.
摘要翻译：本发明的实施例提供一种用于垂直磁记录的磁头，以及能够防止由对准标记引起的数据擦除的磁盘装置。在一个实施例中，磁头包括头元件，头元件至少包括在飞行表面上具有极面的主极和辅助极; 由磁性材料制成的对准标记，用于在研磨主极的极面时检测研磨作业的数量; 以及由磁性材料制成的构件，其在相对于主极的位置的任一方向上从对准标记内部至少超过对准标记向外延伸。

10. 发明申请

US20130033778A1 TRACK PITCH VARIATION MEASUREMENT METHOD USING SPIRAL DC PATTERN WRITING 有权
标题翻译：使用螺旋直流图案书写的轨迹变形测量方法
公开(公告)号：US20130033778A1
公开(公告)日：2013-02-07
申请号：US13196022
申请日：2011-08-02
申请人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
发明人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
IPC分类号： G11B5/09 , G11B21/02 , G11B5/82
CPC分类号： G11B5/743 , G11B5/59627 , G11B5/59661
摘要： In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a radial direction of the magnetic disk medium while rotating the magnetic disk medium, reading the magnetic disk medium while moving the magnetic head in the direction about parallel to the radial direction of the magnetic disk medium while rotating the magnetic disk medium, and calculating a track pitch interval between data tracks of the magnetic disk medium based on the reading of the magnetic disk medium. In another embodiment, a magnetic disk medium includes a DC spiral pattern in a radial region further outward and/or a radial region further inward than a radial region where data is recorded.
摘要翻译：在一个实施例中，一种方法包括使用磁头的写入器将DC图案螺旋写入到磁盘介质上，同时在旋转磁盘介质的同时在大致平行于磁盘介质的径向的方向上移动磁头，在旋转磁盘介质的同时沿着与磁盘介质的径向大致平行的方向移动磁头的同时读取磁盘介质，并且基于读取磁盘介质计算磁盘介质的数据磁道之间的磁道间距间隔磁盘介质。在另一个实施例中，磁盘介质包括在径向区域中进一步向内和/或径向区域的直流螺旋图案，该径向区域比记录数据的径向区域更内侧。

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