公开(公告)号：US20050207061A1

公开(公告)日：2005-09-22

申请号：US11134446

申请日：2005-05-23

申请人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

发明人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

IPC分类号： G11B5/667 ,  G11B5/00 ,  G11B5/127 ,  G11B5/147 ,  G11B5/17 ,  G11B5/265 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

摘要翻译： 磁头被构成为减少记录层的无序写入位或从下层产生的磁场产生的噪声，而不降低磁头的写入磁场强度。 磁头包括设置有主极和一个或多个辅助极的写入头，设置有读取元件的读取头以及以主夹具的方式位于主极两侧的线圈。 位于一侧的线圈产生用于将主极磁化成位于另一侧的线圈所产生的非对称磁力。

公开(公告)号：US06710972B1

公开(公告)日：2004-03-23

申请号：US10366360

申请日：2003-02-14

申请人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

发明人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

IPC分类号： G11B517

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

公开(公告)号：US07031108B2

公开(公告)日：2006-04-18

申请号：US11134446

申请日：2005-05-23

申请人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

发明人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

IPC分类号： G11B5/17

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

摘要翻译： 磁头被构成为减少记录层的无序写入位或从下层产生的磁场产生的噪声，而不降低磁头的写入磁场强度。 磁头包括设置有主极和一个或多个辅助极的写入头，设置有读取元件的读取头以及以主夹具的方式位于主极两侧的线圈。 位于一侧的线圈产生用于将主极磁化成位于另一侧的线圈所产生的非对称磁力。

公开(公告)号：US20050213244A1

公开(公告)日：2005-09-29

申请号：US11134350

申请日：2005-05-23

申请人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

发明人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

IPC分类号： G11B5/667 ,  G11B5/00 ,  G11B5/127 ,  G11B5/147 ,  G11B5/17 ,  G11B5/265 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

公开(公告)号：US07180704B2

公开(公告)日：2007-02-20

申请号：US11134350

申请日：2005-05-23

申请人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

发明人： Masafumi Mochizuki ,  Atsushi Nakamura ,  Yoji Maruyama

IPC分类号： G11B5/17

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996

摘要： A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

摘要翻译： 磁头被构成为减少记录层的无序写入位或从下层产生的磁场产生的噪声，而不降低磁头的写入磁场强度。 磁头包括设置有主极和一个或多个辅助极的写入头，设置有读取元件的读取头以及以主夹具的方式位于主极两侧的线圈。 位于一侧的线圈产生用于将主极磁化成位于另一侧的线圈所产生的非对称磁力。

公开(公告)号：US20060132957A1

公开(公告)日：2006-06-22

申请号：US11354912

申请日：2006-02-16

申请人： Takehiko Hamaguchi ,  Atsushi Nakamura ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideki Sawaguchi

发明人： Takehiko Hamaguchi ,  Atsushi Nakamura ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideki Sawaguchi

IPC分类号： G11B5/02

CPC分类号： G11B5/6005 ,  G11B5/012 ,  G11B5/105 ,  G11B5/127 ,  G11B5/1272 ,  G11B5/2654 ,  G11B5/4886 ,  G11B5/56 ,  G11B2005/001 ,  G11B2005/0021

摘要： A magnetic disk apparatus including: a disk holding data as magnetic information on a magnetic recording film; a head to perform writing and reading of the magnetic information; a rotary actuator to move the head in a radial direction of the disk; plural heat elements in the head to locally heat the disk; a write element in the head to apply a magnetic field to the disk; and means for selecting at least one heat element from the plural heat elements, wherein the means for selecting the heat element selects at least one heat element from the plural heat elements so as to bring a center line of an area heated by the heat element and a center line of the position of the magnetic field generated by the write element into approximate correspondence, in correspondence with a relative angle between the head and a direction of movement of the disk.

公开(公告)号：US20050185335A1

公开(公告)日：2005-08-25

申请号：US11116301

申请日：2005-04-28

申请人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

发明人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

IPC分类号： G11B5/31 ,  G11B5/02 ,  G11B5/127 ,  G11B5/187

CPC分类号： G11B5/1871 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3146

摘要： A magnetic head includes a main pole having a first portion with a length (W1) in a cross-track direction which continuously increases from a leading edge side to a trailing edge side, a second portion formed on a trailing edge side of the first portion, and a third portion formed on a trailing edge side of the second portion. A length (W2) in the cross-track direction of a boundary line between the second portion and the third portion is longer than W1, and a length (W3) in the cross-track direction of a trailing edge of a third portion is substantially equal to W2.

摘要翻译： 磁头包括主极，该主极具有在从前缘侧到后缘侧连续增大的横向方向上的长度（W 1）的第一部分，形成在第一部分的后缘侧的第二部分 部分，以及形成在第二部分的后缘侧上的第三部分。 在第二部分和第三部分之间的边界线的横向方向上的长度（W 2）比W 1长，并且第三部分的后缘的横向方向上的长度（W 3） 部分基本上等于W 2。

公开(公告)号：US20050057853A1

公开(公告)日：2005-03-17

申请号：US10974807

申请日：2004-10-28

申请人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

发明人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

IPC分类号： G11B5/31 ,  G11B5/02 ,  G11B5/127 ,  G11B5/187

CPC分类号： G11B5/1871 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3146

摘要： A magnetic head having at least a main pole having a profile on a magnetic head air bearing surface composed of a first portion having a length in a cross-track direction which continuously increases from a leading edge to a trailing edge, and a second portion located on the side of the trailing edge of the first portion. A length of the second portion in the cross-track direction at the trailing edge is substantially equal to a length in the cross-track direction at the point of contact between the first and second portions. A rate of change in the length of the second portion in the cross-track direction from the leading edge to the trailing edge is different from a rate of increase in the length of the first portion in the cross-track direction.

摘要翻译： 一种磁头，其至少具有在磁头空气轴承表面上具有轮廓的主极，该磁头由从前缘到后缘连续增加的横向方向上的长度的第一部分和位于 在第一部分的后缘侧。 在后缘处的交叉轨道方向上的第二部分的长度基本上等于第一和第二部分之间的接触点处的交叉轨道方向上的长度。 从前缘到后缘的交叉轨道方向上的第二部分的长度的变化率与跨轨道方向上的第一部分的长度的增加速率不同。

公开(公告)号：US06813116B2

公开(公告)日：2004-11-02

申请号：US10314156

申请日：2002-12-09

申请人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

发明人： Atsushi Nakamura ,  Masafumi Mochizuki ,  Tomohiro Okada ,  Kimitoshi Etoh ,  Isao Nunokawa ,  Yoshiaki Kawato

IPC分类号： G11B5187

CPC分类号： G11B5/1871 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3146

摘要： A single-pole type magnetic head for perpendicular recording which reduces the amount of side writing even in the presence of a yaw angle and prevents the effective track width from decreasing, and a magnetic recording disk apparatus using the same. A main pole is composed of at least two portions where the width of the first portion continuously increases from the upstream side to the downstream side in the medium moving direction and the width of the second portion is the same as the width of the first portion's downstream edge in the medium moving direction and is constant from the upstream side to the downstream side in the medium moving direction. This prevents the recording magnetic field strength from decreasing at the track edge and increases the effective track width while suppressing side writing, thereby realizing a magnetic recording disk apparatus with a high track density.

摘要翻译： 一种用于垂直记录的单极型磁头，即使在存在偏航角的情况下也减少了侧面写入量，并且防止了有效轨道宽度的减小，以及使用该磁头的磁记录盘装置。 主极由至少两个部分组成，其中第一部分的宽度在介质移动方向上从上游侧到下游侧连续增加，第二部分的宽度与第一部分的下游的宽度相同 在介质移动方向上边缘并且在介质移动方向上从上游侧到下游侧是恒定的。 这防止记录磁场强度在轨道边缘处减小，并且在抑制侧面写入的同时增加有效轨道宽度，从而实现具有高轨道密度的磁记录盘装置。

公开(公告)号：US06741421B2

公开(公告)日：2004-05-25

申请号：US10046973

申请日：2002-01-17

申请人： Masafumi Mochizuki ,  Tomohiro Okada ,  Atsushi Nakamura

发明人： Masafumi Mochizuki ,  Tomohiro Okada ,  Atsushi Nakamura

IPC分类号： G11B5187

CPC分类号： G11B5/1278 ,  G11B5/1872 ,  G11B5/3967 ,  G11B5/4886 ,  G11B2005/0029 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A single pole type magnetic head has a writing head including a main pole and an auxiliary pole, and a reading head including a read element, wherein the main pole has a recess on the trailing side of its air bearing surface. When recording is performed on a perpendicular medium by using the single pole type magnetic head, the magnetic field distribution on the trailing side of the main pole air bearing surface is linearized, whereby the magnetic reversal is determined. As a result, a bit is recorded without curving the shape of magnetic reversal. Accordingly, when the bit is read, the magnetic reversal width appears to be large, so that the half-width of a solitary wave is increased, and at the same time, the recording track width is narrowed with an increase in linear recording density.

摘要翻译： 单极型磁头具有包括主极和辅助极的写入头和包括读取元件的读取头，其中主极在其空气支承表面的后侧具有凹部。 当通过使用单极型磁头在垂直介质上进行记录时，主极空气轴承表面的后侧的磁场分布被线性化，由此确定磁反转。 结果，在不弯曲磁性反转的形状的情况下记录位。 因此，当读取位时，磁反转宽度看起来很大，使得孤立波的半宽度增加，并且同时，记录磁道宽度随着线性记录密度的增加而变窄。