公开(公告)号：US06804089B2

公开(公告)日：2004-10-12

申请号：US10424844

申请日：2003-04-29

Applicant: Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

Inventor： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

IPC: G11B527

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3183 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

Abstract: The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.

Abstract translation: 本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。 通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化 不敏感。 由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。 此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它 可能抑制巴克豪森噪音的产生。 通过诱导磁轭内的迷宫结构也可以获得类似的效果。

公开(公告)号：US06741431B2

公开(公告)日：2004-05-25

申请号：US10424822

申请日：2003-04-29

Applicant: Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

Inventor： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

IPC: G11B5127

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3183 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

Abstract: The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.

Abstract translation: 本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。 通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化 不敏感。 由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。 此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以匹配该尺寸，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它 可能抑制巴克豪森噪音的产生。 通过诱导磁轭内的迷宫结构也可以获得类似的效果。

公开(公告)号：US06636390B2

公开(公告)日：2003-10-21

申请号：US09801698

申请日：2001-03-09

Applicant: Tomomi Funayama ,  Masatoshi Yoshikawa ,  Takashi Koizumi ,  Akio Hori ,  Yuichi Osawa

Inventor： Tomomi Funayama ,  Masatoshi Yoshikawa ,  Takashi Koizumi ,  Akio Hori ,  Yuichi Osawa

IPC: G11B5187

CPC classification number: B82Y10/00 ,  G11B5/3903 ,  G11B5/3967

Abstract: A magnetic head for vertical magnetic. The magnetic head includes: a recording head including a first main pole and a first return yoke, the first main pole having a first medium facing portion, the first return yoke having a second medium facing portion, and a reproducing head including a second main pole and a second return yoke, the second main pole having a third medium facing portion, the second return yoke having a fourth medium facing portion, first angle &thgr;1 between first and second straight lines being smaller than second angle &thgr;2 between the first straight line and third straight line, the first straight line connecting centers of medium facing surfaces the first medium facing portion and the second medium facing portion, the second straight line connecting opposing corners of medium facing surfaces of the first medium facing portion and the second medium facing portion, and the third straight line connecting centers of medium facing surfaces of the third medium facing portion and the fourth medium facing portion.

Abstract translation: 用于垂直磁性的磁头。 磁头包括：记录头，包括第一主极和第一返回轭，第一主极具有第一介质面对部分，第一返回轭具有第二介质面对部分，以及再现头，包括第二主极 和第二返回轭，所述第二主极具有第三介质面对部分，所述第二返回轭具有第四介质面对部分，第一和第二直线之间的第一角度θ1小于第一直线与第三直线之间的第二角度θ2 第一直线连接介质相对表面的第一介质面向部分和第二介质面向部分的中心，第二直线连接第一介质面向部分和第二介质面向部分的介质相对表面的相对角，以及 第三直线连接第三介质面向部分的介质相对表面的中心和面向p的第四介质 原因。

公开(公告)号：US07100267B2

公开(公告)日：2006-09-05

申请号：US10635508

申请日：2003-08-07

Applicant: Hiroaki Yoda ,  Yuichi Osawa ,  Tomomi Funayama

Inventor： Hiroaki Yoda ,  Yuichi Osawa ,  Tomomi Funayama

IPC: G11B5/127 ,  G11B5/187

CPC classification number: G11B5/3925 ,  G11B5/00 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/3116 ,  G11B2005/0002 ,  G11B2005/0021 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49055 ,  Y10T29/49067

Abstract: A method for producing a magnetic head, including the steps of forming a magnetic body on a substrate, the magnetic body including a principal plane facing the substrate and a rear plane opposite to the principal plane; applying a beam to the rear plane of the magnetic body and forming a portion defining a hole extending from the rear plane to the principal plane; forming a magnetic gap in the hole; and separating the magnetic body and the magnetic gap from the substrate and forming medium facing surface substantially coplanar with the principal plane.

Abstract translation: 一种制造磁头的方法，包括以下步骤：在基板上形成磁体，所述磁体包括面向所述基板的主平面和与所述主平面相对的后平面; 将光束施加到磁体的后平面并形成限定从后平面延伸到主平面的孔的部分; 在孔中形成磁隙; 并且将磁体和磁隙从衬底分离并且形成与主平面大致共面的介质面对表面。

公开(公告)号：US06665143B2

公开(公告)日：2003-12-16

申请号：US09810187

申请日：2001-03-19

Applicant: Hiroaki Yoda ,  Yuichi Osawa ,  Tomomi Funayama

Inventor： Hiroaki Yoda ,  Yuichi Osawa ,  Tomomi Funayama

IPC: G11B5127

CPC classification number: G11B5/3925 ,  G11B5/00 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/3116 ,  G11B2005/0002 ,  G11B2005/0021 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49055 ,  Y10T29/49067

Abstract: There is provided a magnetic head capable of efficiently carrying out a recording or reproducing operation even in the case of a shorter magnetic path length and a shorter wavelength signal. The magnetic head comprises: a pair of magnetic bodies including respective first and second medium facing surfaces, respective first and second rear surfaces opposite to the medium facing surfaces, and respective inner side surfaces, the inner side surfaces facing each other; and a magnetic gap disposed between the inner side surfaces and including third medium facing surface coplanar with the first and the second medium facing surfaces and third rear surface coplanar with the first and second rear surfaces; one of the inner side surfaces satisfying relationships of x=G1 /2 with respect to 0≦y≦TH, and 0.1·tan{2(x−G1 /2)}+TH≦y≦5·tan(2(x−G1/2))+TH with respect to TH≦y where x represents X-coordinate of the one of the inner side surfaces and y represents Y-coordinate of the one of the inner side surfaces, the X-axis extends from a center of the third medium facing surface toward a center of the first or the second medium facing surface, the Y-axis extends from the center of the third medium facing surface toward the third rear surface, the Y-axis is substantially perpendicular to the X-axis, and G1 and TH respectively represent constants.

Abstract translation: 即使在较短的磁路长度和较短的波长信号的情况下，也能够有效地执行记录或重放操作的磁头。 磁头包括：一对磁体，包括相应的第一和第二介质面对表面，与介质相对表面相对的相应的第一和第二后表面，以及相应的内侧表面，内侧表面彼此相对; 以及设置在所述内侧表面之间并且包括与所述第一和第二介质相对表面共面的第三介质面对表面和与所述第一和第二后表面共面的第三后表面的磁隙; 内侧表面满足关系的其中一个表示内侧表面之一的X坐标，y表示内侧表面之一的Y坐标，X轴从第三介质的中心朝向 面朝向第一或第二介质面向表面的中心，Y轴从第三介质相对表面的中心朝向第三后表面延伸，Y轴基本上垂直于X轴，并且G1和 TH分别表示常数。

公开(公告)号：US06606225B1

公开(公告)日：2003-08-12

申请号：US09583575

申请日：2000-05-31

Applicant: Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

Inventor： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

IPC: G11B5127

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3183 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

Abstract: The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.

Abstract translation: 本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。 通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化 不敏感。 由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。 此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它 可能抑制巴克豪森噪音的产生。 通过诱导磁轭内的迷宫结构也可以获得类似的效果。

公开(公告)号：US07075755B2

公开(公告)日：2006-07-11

申请号：US10671492

申请日：2003-09-29

Applicant: Shigeru Haneda ,  Yuichi Osawa ,  Shiho Nakamura

Inventor： Shigeru Haneda ,  Yuichi Osawa ,  Shiho Nakamura

IPC: G11B5/39

CPC classification number: B82Y25/00 ,  G01R33/093 ,  G11B5/2452 ,  G11B5/2457 ,  G11B5/3903 ,  G11B5/3993 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0016 ,  H01F10/3204 ,  H01F10/3213 ,  H01F10/3254

Abstract: A magneto-resistance effect element of the present invention allows detection of a micro-bit signal with a high sensitivity. The magneto-resistance effect element is provided with a first magnetic substance layer, a spacer layer stacked on the first magnetic substance layer, a second magnetic substance layer stacked on the spacer, an insulating layer positioned adjacent to a stacked structure comprising the first magnetic substance layer, the spacer layer and the second magnetic substance layer, a gate electrode positioned adjacent to the insulating layer, and a magnetism sensitive region controlled by a voltage applied to the gate electrode.

Abstract translation: 本发明的磁阻效应元件允许以高灵敏度检测微位信号。 磁阻效应元件设置有第一磁性物质层，堆叠在第一磁性物质层上的间隔层，堆叠在间隔物上的第二磁性物质层，邻近堆叠结构定位的绝缘层，包括第一磁性物质 层，间隔层和第二磁性物质层，邻近绝缘层定位的栅极电极和由施加到栅电极的电压控制的磁敏感区域。