公开(公告)号：US06267824B1

公开(公告)日：2001-07-31

申请号：US09314129

申请日：1999-05-19

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: C21D104

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/39 ,  G11B5/3903 ,  G11B5/3967 ,  G11B2005/3996

Abstract: In a magnetoresistive effect composite head, magnetic shields oppose each other on a slider main body made of a ceramic material through a predetermined gap, and a magnetoresistive effect element is sandwiched and stacked between the magnetic shields with a magnetic spacer layer made of an insulator. A recording head portion uses one of the magnetic shields as a first magnetic pole, and has a second magnetic pole formed on a surface of the first magnetic pole opposite to the magnetoresistive effect element through a magnetic gap, to record information on a recording medium by means of a magnetic field generated in the magnetic gap. The magnetoresistive effect element includes a central region made of a spin-valve element to sense a medium field, and end regions for supplying a bias field and a current to the central region. The second magnetic pole is constituted by a stacked film of first and second magnetic films having different saturation magnetizations. The first and second magnetic films are close to and far from the magnetic gap, respectively. The saturation magnetization of the first magnetic film is set to a value larger than that of the second magnetic film. A method of manufacturing the above head is also disclosed.

Abstract translation: 在磁阻效应复合头中，磁屏蔽通过预定间隙在由陶瓷材料制成的滑动器主体上彼此相对，并且磁阻效应元件被夹在磁屏蔽之间并由绝缘体制成的磁隔离层叠置在磁屏蔽之间。 记录头部分使用磁屏蔽之一作为第一磁极，并且具有通过磁隙形成在与磁阻效应元件相对的第一磁极的表面上的第二磁极，以通过磁记录介质将信息记录在记录介质上 在磁隙中产生的磁场的装置。 磁阻效应元件包括由感应中间场的自旋阀元件制成的中心区域和用于向中心区域提供偏置场和电流的端部区域。 第二磁极由具有不同饱和磁化的第一和第二磁性膜的叠层膜构成。 第一和第二磁性膜分别靠近和远离磁隙。 将第一磁性膜的饱和磁化强度设定为大于第二磁性膜的饱和磁化强度。 还公开了制造上述头的方法。

公开(公告)号：US6154345A

公开(公告)日：2000-11-28

申请号：US55125

申请日：1998-04-06

Applicant: Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Sinsaku Saitho ,  Hiroaki Tachibana ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Sinsaku Saitho ,  Hiroaki Tachibana ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/31 ,  G11B5/265 ,  G11B5/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/3116 ,  G11B5/3163

Abstract: An ID head is formed after a MR head is formed. An upper shield far from a substrate is a first magnetic pole. A nonmagnetic insulator existing through a magnetic gap on the first magnetic pole determines zero throat height, thereby specifying a recording track width of less than 2 .mu.m. The ID head comprises a front end portion of a second magnetic pole, which is exposed to ABS and partly rides over the nonmagnetic insulator, a nonmagnetic insulator for burying a step by the front end portion, a coil which is formed on the nonmagnetic insulator and covered with a nonmagnetic insulator, and a main body portion of the second magnetic pole formed so as to ride over the coil and front end portion. As a result, it is possible to solved various problems of the ID head in which the front end portion of the second magnetic pole is formed first to realize a narrow track width.

Abstract translation: 在形成MR头之后形成ID头。 远离基板的上屏蔽件是第一磁极。 通过第一磁极上的磁隙存在的非磁性绝缘体确定零喉部高度，从而指定小于2μm的记录轨道宽度。 ID头包括暴露于ABS并部分地越过非磁性绝缘体的第二磁极的前端部分，用于由前端部分掩埋台阶的非磁性绝缘体，形成在非磁性绝缘体上的线圈和 覆盖有非磁性绝缘体，第二磁极的主体部分形成为绕过线圈和前端部分。 结果，可以解决首先形成第二磁极的前端部以实现窄轨道宽度的ID头的各种问题。

公开(公告)号：US6057991A

公开(公告)日：2000-05-02

申请号：US978586

申请日：1997-11-26

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48

CPC classification number: G11B5/3967 ,  G11B5/1878 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/4886 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046

Abstract: Disclosed is a merged head device which has: a slider main body with an air bearing surface to a magnetic medium; two magnetic shield films which are parallel disposed on a common plane with a predetermined interval and orthogonal to air flow on the downstream side of the air bearing surface of the slider main body; a magnetoresistive effect head which is disposed through a magnetic separating layer of an insulator between the two magnetic shield films; an inductive head which is composed of one magnetic pole film corresponding to one of the two magnetic shield films which is located downstream and the other magnetic pole film which is disposed through a magnetic gap on the other side of the one magnetic pole film where the magnetoresistive effect head does not exist, and recording is conducted by magnetic field which generates at the magnetic gap; and concave portions which are formed on both sides of the other magnetic pole film along the direction of the air flow on the air bearing surface of the slider main body so as to define a width of the other magnetic pole film; wherein the concave portions are filled with a non-magnetic material.

Abstract translation: 公开了一种合并头装置，其具有：滑动器主体，其具有到磁介质的空气轴承表面; 两个磁屏蔽膜，其平行地设置在公共平面上，具有预定间隔并且与滑块主体的空气支承表面的下游侧上的空气流正交; 磁阻效应头，通过两个磁屏蔽膜之间的绝缘体的磁分离层布置; 感应头由一个对应于位于下游的两个磁屏蔽膜之一的磁极膜构成，另一个磁极膜通过一个磁极膜的另一侧的磁隙设置，其中磁阻 效果头不存在，并且通过在磁隙处产生的磁场进行记录; 以及凹部，其形成在所述另一个磁极膜的两侧，沿着所述滑块主体的空气支承面上的空气流动方向，以限定所述另一个磁极膜的宽度; 其中所述凹部填充有非磁性材料。

公开(公告)号：US5938941A

公开(公告)日：1999-08-17

申请号：US116570

申请日：1998-07-16

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/31 ,  G11B5/39 ,  G11B5/00

CPC classification number: G11B5/3116 ,  G11B5/3163 ,  G11B5/3967

Abstract: An inductive head structure provided in a magnetoresistance effect composite head includes an inductive head and a magnetoresistance effect head, the inductive head structure including a magnetic gap layer sandwiched by first and second magnetic layers acting as magnetic poles, the first magnetic layer being positioned close to the magnetoresistance effect head, the magnetic gap layer being made of a non-magnetic and electrically insulative material, wherein the non-magnetic and electrically insulative material has a higher etching rate to reactive ion etching than at least a magnetic material of the second magnetic layer.

Abstract translation: 设置在磁阻效应复合头中的感应头结构包括感应头和磁阻效应头，感应头结构包括由用作磁极的第一和第二磁性层夹持的磁隙层，第一磁性层位于 磁阻效应头，磁隙层由非磁性和电绝缘材料制成，其中非磁性和电绝缘材料具有比至少第二磁性层的磁性材料更高的反应离子蚀刻蚀刻速率 。

公开(公告)号：US6125009A

公开(公告)日：2000-09-26

申请号：US979179

申请日：1997-11-26

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/31 ,  G11B5/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/39

Abstract: In a magnetoresistive effect composite head, magnetic shields oppose each other on a slider main body made of a ceramic material through a predetermined gap, and a magnetoresistive effect element is sandwiched and stacked between the magnetic shields with a magnetic spacer layer made of an insulator. A recording head portion uses one of the magnetic shields as a first magnetic pole, and has a second magnetic pole formed on a surface of the first magnetic pole opposite to the magnetoresistive effect element through a magnetic gap, to record information on a recording medium by means of a magnetic field generated in the magnetic gap. The magnetoresistive effect element includes a central region made of a spin-valve element to sense a medium field, and end regions for supplying a bias field and a current to the central region. The second magnetic pole is constituted by a stacked film of first and second magnetic films having different saturation magnetizations. The first and second magnetic films are close to and far from the magnetic gap, respectively. The saturation magnetization of the first magnetic film is set to a value larger than that of the second magnetic film. A method of manufacturing the above head is also disclosed.

Abstract translation: 在磁阻效应复合头中，磁屏蔽通过预定间隙在由陶瓷材料制成的滑动器主体上彼此相对，并且磁阻效应元件被夹在磁屏蔽之间并由绝缘体制成的磁隔离层叠置在磁屏蔽之间。 记录头部分使用磁屏蔽之一作为第一磁极，并且具有通过磁隙形成在与磁阻效应元件相对的第一磁极的表面上的第二磁极，以通过磁记录介质将信息记录在记录介质上 在磁隙中产生的磁场的装置。 磁阻效应元件包括由感应中间场的自旋阀元件制成的中心区域和用于向中心区域提供偏置场和电流的端部区域。 第二磁极由具有不同饱和磁化的第一和第二磁性膜的叠层膜构成。 第一和第二磁性膜分别靠近和远离磁隙。 将第一磁性膜的饱和磁化强度设定为大于第二磁性膜的饱和磁化强度。 还公开了制造上述头的方法。

公开(公告)号：US6055137A

公开(公告)日：2000-04-25

申请号：US990018

申请日：1997-12-12

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/31 ,  G11B5/39 ,  G11B5/42

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/3113 ,  G11B5/3116

Abstract: A magnetoresistive effect composite head includes a read magnetoresistive effect (MR) head and a recording inductive (ID) head. The MR head has first and second magnetic shield films and an MR element. The first and second magnetic shield films are formed on a slider main body in a stacked manner through a predetermined gap therebetween. Each of the first and second magnetic shield films has an end face flush with a slider floating surface. The MR element is formed between the first and second magnetic shield films through magnetic isolation layers each made of an insulator. The ID head has a first magnetic pole film, a coil, and a second magnetic pole film. The first magnetic pole film serves also as the second magnetic shield film. The coil and the second magnetic pole film are formed through an insulator on the first magnetic pole film on a surface opposite to the MR element through a predetermined magnetic gap. The second magnetic pole film has a projecting portion that defines a track width. The projecting portion has a distal end face substantially flush with the slider floating surface. A method of manufacturing a magnetoresistive effect head is also disclosed.

Abstract translation: 磁阻效应复合头包括读磁阻效应（MR）磁头和记录电感（ID）磁头。 MR头具有第一和第二磁屏蔽膜和MR元件。 第一和第二磁屏蔽膜通过其间的预定间隙以堆叠的方式形成在滑块主体上。 第一和第二磁屏蔽膜中的每一个具有与滑块浮动表面齐平的端面。 MR元件通过各自由绝缘体制成的磁隔离层形成在第一和第二磁屏蔽膜之间。 ID头具有第一磁极膜，线圈和第二磁极膜。 第一磁极膜还用作第二磁屏蔽膜。 线圈和第二磁极膜通过预定磁隙与MR元件相对的表面上的第一磁极膜上的绝缘体形成。 第二磁极膜具有限定轨道宽度的突出部分。 突出部分具有与滑块浮动表面基本齐平的远端面。 还公开了一种制造磁阻效应头的方法。

公开(公告)号：US6141859A

公开(公告)日：2000-11-07

申请号：US342195

申请日：1999-06-29

Applicant: Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

Inventor： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC: G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48 ,  G11B5/42

CPC classification number: G11B5/3967 ,  G11B5/1878 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/4886 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046

Abstract: A merged head device which has: a slider main body with an air bearing surface to a magnetic medium; two magnetic shield films which are parallel disposed on a common plane with a predetermined interval and orthogonal to air flow on the downstream side of the air bearing surface of the slider main body; a magnetoresistive effect head which is disposed through a magnetic separating layer of an insulator between the two magnetic shield films; an inductive head which is composed of one magnetic pole film corresponding to one of the two magnetic shield films which is located downstream and the other magnetic pole film which is disposed through a magnetic gap on the other side of the one magnetic pole film where the magnetoresistive effect head does not exist, and recording is conducted by magnetic field which generates at the magnetic gap; and concave portions which are formed on both sides of the other magnetic pole film along the direction of the air flow on the air bearing surface of the slider main body so as to define a width of the other magnetic pole film; wherein the concave portions are filled with a non-magnetic material.

Abstract translation: 一种合并头装置，具有：具有空气支承面到磁介质的滑块主体; 两个磁屏蔽膜，其平行地设置在公共平面上，具有预定间隔并且与滑块主体的空气支承表面的下游侧上的空气流正交; 磁阻效应头，通过两个磁屏蔽膜之间的绝缘体的磁分离层布置; 感应头由一个对应于位于下游的两个磁屏蔽膜之一的磁极膜构成，另一个磁极膜通过一个磁极膜的另一侧的磁隙设置，其中磁阻 效果头不存在，并且通过在磁隙处产生的磁场进行记录; 以及凹部，其形成在所述另一个磁极膜的两侧，沿着所述滑块主体的空气支承面上的空气流动方向，以限定所述另一个磁极膜的宽度; 其中所述凹部填充有非磁性材料。