公开(公告)号：US20110292545A1

公开(公告)日：2011-12-01

申请号：US13095450

申请日：2011-04-27

申请人： Hiroyuki Katada ,  Takayuki Ichihara ,  Yoshiaki Kawato

发明人： Hiroyuki Katada ,  Takayuki Ichihara ,  Yoshiaki Kawato

IPC分类号： G11B5/10

CPC分类号： G11B5/3912 ,  G11B5/1278 ,  G11B5/3967

摘要： In a magnetic head to be used for a shingled recording method, degradation of a signal resolution and a decrease in a signal-to-noise ratio which are caused by an asymmetrical inter-bit transition curvature are prevented, and a low bit error rate is realized. A magnetic head includes a recording head and a reproducing head. The reproducing head includes a pair of magnetic shields and a sensor sandwiched between the pair of magnetic shields. The gap between the magnetic shields is formed so that the longitudinal direction thereof gets inclined by a certain angle with respect to a cross-track direction in line with the shape of a curvature of an inter-bit transition on an effective record track in a record pattern recorded on a recording medium.

摘要翻译： 在用于带状闪烁记录方法的磁头中，防止由不对称的位间位移变化曲线引起的信号分辨率的劣化和信噪比的降低，并且低位错误率是 实现了 磁头包括记录头和再现头。 再现头包括一对磁屏蔽和夹在该对屏蔽之间的传感器。 磁屏蔽之间的间隙形成为使得其纵向相对于横向方向倾斜一定角度，与记录中的有效记录轨道上的位间转换的曲率的形状相对应 记录在记录介质上的图案。

公开(公告)号：US20080055791A1

公开(公告)日：2008-03-06

申请号：US11890004

申请日：2007-08-03

申请人： Hiroyuki Katada ,  Hiroyuki Hoshiya

发明人： Hiroyuki Katada ,  Hiroyuki Hoshiya

IPC分类号： G11B5/33

CPC分类号： G11B5/3903 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3163 ,  G11B2005/3996

摘要： Embodiments of the present invention aim suppress the generation of spin torque noise in a current perpendicular to plane magnetoresistive head. According to one embodiment, when sensing current is applied to a current perpendicular to plane magnetoresistive head from a free layer toward a first pinned layer, a configuration wherein the relative angle between the magnetization of a second pinned layer and the magnetization of the free layer is in the range of 70 to 80 degrees is used. Further, when sensing current is applied to a current perpendicular to plane magnetoresistive head from a first pinned layer toward a free layer, a configuration wherein the relative angle between the magnetization of a second pinned layer and the magnetization of the free layer is in the range of 100 to 110 degrees is used.

摘要翻译： 本发明的实施例旨在抑制垂直于平面磁阻磁头的电流中的自旋转矩噪声的产生。 根据一个实施例，当感测电流从自由层向第一被钉扎层施加到垂直于平面磁阻头的电流时，其中第二被钉扎层的磁化与自由层的磁化之间的相对角度为 在70〜80度的范围内使用。 此外，当感测电流从垂直于平面磁阻头的电流从第一被钉扎层朝向自由层施加时，其中第二被钉扎层的磁化与自由层的磁化之间的相对角度在该范围内的构造 使用100至110度。

公开(公告)号：US08462468B2

公开(公告)日：2013-06-11

申请号：US13095450

申请日：2011-04-27

申请人： Hiroyuki Katada ,  Takayuki Ichihara ,  Yoshiaki Kawato

发明人： Hiroyuki Katada ,  Takayuki Ichihara ,  Yoshiaki Kawato

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/3912 ,  G11B5/1278 ,  G11B5/3967

摘要： In a magnetic head to be used for a shingled recording method, degradation of a signal resolution and a decrease in a signal-to-noise ratio which are caused by an asymmetrical inter-bit transition curvature are prevented, and a low bit error rate is realized. A magnetic head includes a recording head and a reproducing head. The reproducing head includes a pair of magnetic shields and a sensor sandwiched between the pair of magnetic shields. The gap between the magnetic shields is formed so that the longitudinal direction thereof gets inclined by a certain angle with respect to a cross-track direction in line with the shape of a curvature of an inter-bit transition on an effective record track in a record pattern recorded on a recording medium.

摘要翻译： 在用于带状闪烁记录方法的磁头中，防止由不对称的位间位移变化曲线引起的信号分辨率的劣化和信噪比的降低，并且低位错误率是 实现了 磁头包括记录头和再现头。 再现头包括一对磁屏蔽和夹在该对屏蔽之间的传感器。 磁屏蔽之间的间隙形成为使得其纵向相对于横向方向倾斜一定角度，与记录中的有效记录轨道上的位间转换的曲率的形状相对应 记录在记录介质上的图案。

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。

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。

公开(公告)号：USD281604S

公开(公告)日：1985-12-03

申请号：US462926

申请日：1983-02-01

申请人： Kozo Kawasaki ,  Hiroyuki Katada

设计人： Kozo Kawasaki ,  Hiroyuki Katada

公开(公告)号：US08830623B2

公开(公告)日：2014-09-09

申请号：US13330570

申请日：2011-12-19

申请人： Tomoaki Hamasaki ,  Hiroyuki Katada ,  Isao Nunokawa ,  Kimitoshi Etoh

发明人： Tomoaki Hamasaki ,  Hiroyuki Katada ,  Isao Nunokawa ,  Kimitoshi Etoh

IPC分类号： G11B5/127 ,  G11B5/31

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315

摘要： In one embodiment, a magnetic head includes a main magnetic pole, a trailing shield positioned on a trailing side of the main magnetic pole, a trailing gap positioned between the trailing shield and the main magnetic pole, side shields positioned on either side of the main magnetic pole in a cross-track direction, side gaps positioned between the side shields and the main magnetic pole on either side of the main magnetic pole in the cross-track direction, and trailing shield gaps positioned on either side of the main magnetic pole in the cross-track direction between the trailing shield and the side shields, wherein the trailing shield gaps extend beyond the side gaps in a direction parallel to the cross-track direction. In addition, a method for producing a magnetic head as described above is also disclosed, according to one embodiment.

摘要翻译： 在一个实施例中，磁头包括主磁极，位于主磁极的后侧的后屏蔽，位于后屏蔽和主磁极之间的后置间隙，位于主磁体两侧的侧屏蔽 位于主磁极两侧的侧屏和主磁极之间的横向方向上的侧面间隙以及位于主磁极两侧的后屏蔽间隙 后屏蔽和侧屏蔽之间的交叉轨道方向，其中后屏蔽间隙在平行于交叉轨道方向的方向上延伸超过侧间隙。 此外，根据一个实施例，还公开了如上所述的用于制造磁头的方法。

公开(公告)号：US08547666B2

公开(公告)日：2013-10-01

申请号：US11890004

申请日：2007-08-03

申请人： Hiroyuki Katada ,  Hiroyuki Hoshiya

发明人： Hiroyuki Katada ,  Hiroyuki Hoshiya

IPC分类号： G11B5/39

CPC分类号： G11B5/3903 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3163 ,  G11B2005/3996

摘要： Embodiments of the present invention aim suppress the generation of spin torque noise in a current perpendicular to plane magnetoresistive head. According to one embodiment, when sensing current is applied to a current perpendicular to plane magnetoresistive head from a free layer toward a first pinned layer, a configuration wherein the relative angle between the magnetization of a second pinned layer and the magnetization of the free layer is in the range of 70 to 80 degrees is used. Further, when sensing current is applied to a current perpendicular to plane magnetoresistive head from a first pinned layer toward a free layer, a configuration wherein the relative angle between the magnetization of a second pinned layer and the magnetization of the free layer is in the range of 100 to 110 degrees is used.

摘要翻译： 本发明的实施例旨在抑制垂直于平面磁阻磁头的电流中的自旋转矩噪声的产生。 根据一个实施例，当感测电流从自由层向第一被钉扎层施加到垂直于平面磁阻头的电流时，其中第二被钉扎层的磁化与自由层的磁化之间的相对角度为 在70〜80度的范围内使用。 此外，当感测电流从垂直于平面磁阻头的电流从第一被钉扎层朝向自由层施加时，其中第二被钉扎层的磁化与自由层的磁化之间的相对角度在该范围内的构造 使用100至110度。

公开(公告)号：USD271200S

公开(公告)日：1983-11-01

申请号：US261080

申请日：1981-05-06

申请人： Kozo Kawasaki ,  Hiroyuki Katada

设计人： Kozo Kawasaki ,  Hiroyuki Katada

公开(公告)号：US20130155544A1

公开(公告)日：2013-06-20

申请号：US13330570

申请日：2011-12-19

申请人： Tomoaki Hamasaki ,  Hiroyuki Katada ,  Isao Nunokawa ,  Kimitoshi Etoh

发明人： Tomoaki Hamasaki ,  Hiroyuki Katada ,  Isao Nunokawa ,  Kimitoshi Etoh

IPC分类号： G11B5/127 ,  B05D5/12 ,  G11B21/02

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315

摘要： In one embodiment, a magnetic head includes a main magnetic pole, a trailing shield positioned on a trailing side of the main magnetic pole, a trailing gap positioned between the trailing shield and the main magnetic pole, side shields positioned on either side of the main magnetic pole in a cross-track direction, side gaps positioned between the side shields and the main magnetic pole on either side of the main magnetic pole in the cross-track direction, and trailing shield gaps positioned on either side of the main magnetic pole in the cross-track direction between the trailing shield and the side shields, wherein the trailing shield gaps extend beyond the side gaps in a direction parallel to the cross-track direction. In addition, a method for producing a magnetic head as described above is also disclosed, according to one embodiment.

摘要翻译： 在一个实施例中，磁头包括主磁极，位于主磁极的后侧的后屏蔽，位于后屏蔽和主磁极之间的后置间隙，位于主磁体两侧的侧屏蔽 位于主磁极两侧的侧屏和主磁极之间的横向方向上的侧面间隙以及位于主磁极两侧的后屏蔽间隙 后屏蔽和侧屏蔽之间的交叉轨道方向，其中后屏蔽间隙在平行于交叉轨道方向的方向上延伸超过侧间隙。 此外，根据一个实施例，还公开了如上所述的用于制造磁头的方法。