公开(公告)号：US07145331B2

公开(公告)日：2006-12-05

申请号：US10478136

申请日：2002-07-15

申请人： Akio Kuroe ,  Sayuri Muramatsu ,  Akio Murata ,  Ken Takahashi ,  Yoshihiro Tosaki

发明人： Akio Kuroe ,  Sayuri Muramatsu ,  Akio Murata ,  Ken Takahashi ,  Yoshihiro Tosaki

IPC分类号： G01R33/02

CPC分类号： G11B5/332 ,  G01R33/02 ,  G11B5/335 ,  Y10T29/49002 ,  Y10T428/1171

摘要： In order to obtain a magneto-impedance type magnetic sensor having a soft magnetic film facing to a conductive nonmagnetic film, and available a large impedance change with a carrier signal at a relatively low frequency, the magnetic sensor comprises a meander type conductive nonmagnetic thin film of zigzag shape formed with at least one pair of electrode terminals at both ends and a soft magnetic film which is strip-shaped so as to face thereto at a plurality of regions and has an easy axis of magnetization in a width direction of the strip shape, a high frequency carrier signal is applied to the above-mentioned electrode terminals and further a direct current bias magnetic field is applied. By performing AM detection of an AM modulation signal output from the above-mentioned electrode terminals, an impedance change of the conductive nonmagnetic film which is changed by external magnetic field is detected as a change of the high frequency carrier signal, thereby the external magnetic field can be detected.

摘要翻译： 为了获得具有面向导电非磁性膜的软磁性膜的磁阻型磁传感器，并且以较低频率的载波信号具有较大的阻抗变化，磁传感器包括弯曲型导电非磁性薄膜 在两端形成有至少一对电极端子的锯齿形状，以及在多个区域呈带状的软磁性膜，并且在带状的宽度方向上具有容易的磁化轴 ，向上述电极端子施加高频载波信号，并施加直流偏置磁场。 通过对从上述电极端子输出的AM调制信号进行AM检测，检测由外部磁场变化的导电性非磁性膜的阻抗变化，作为高频载波信号的变化，由此外部磁场 可以检测。

公开(公告)号：US06590740B2

公开(公告)日：2003-07-08

申请号：US09917434

申请日：2001-07-27

申请人： Akio Kuroe ,  Akio Murata ,  Sayuri Muramatsu

发明人： Akio Kuroe ,  Akio Murata ,  Sayuri Muramatsu

IPC分类号： G11B5127

CPC分类号： G11B5/332

摘要： A shielded magnetic head includes a magnetically shielded gap and first to fourth conductive magnetic films disposed in the gap. The first to fourth conductive magnetic films, each extending parallel to a tip face of a magnetic head to be opposed to a magnetic recording medium, are aligned at a distance from one another in a direction perpendicular to the tip face so as to be away from the tip face in ascending order and connected to one another so as to form a bridge circuit. The distance between the first conductive magnetic film and the tip face is set so that a signal magnetic field from the magnetic recording medium is applied to the first conductive magnetic film. By canceling impedance components that do not vary depending on a magnetic field, the shielded magnetic head detects only impedance components that vary depending on a signal magnetic field.

公开(公告)号：US06538843B1

公开(公告)日：2003-03-25

申请号：US09704492

申请日：2000-11-02

申请人： Akio Kuroe ,  Sayuri Muramatsu ,  Hirotsugu Fusayasu ,  Akio Murata

发明人： Akio Kuroe ,  Sayuri Muramatsu ,  Hirotsugu Fusayasu ,  Akio Murata

IPC分类号： G11B5127

CPC分类号： G11B5/332

摘要： In a high-frequency impedance type magnetic head having high impedance and capable of efficiently detecting a change in impedance, an electrically conductive metal film is sandwiched between two soft magnetic films, and the two soft magnetic films form a portion of a magnetic path. The thickness of one soft magnetic film is smaller than the thickness of the other soft magnetic film. The electrically conductive metal thin film has a pair of electrodes at respective ends thereof, to which are connected an oscillator for applying a high frequency carrier signal to the electrodes and a high frequency amplifier having a demodulator circuit. Further, an electrically conductive metal film winding is provided, and a DC current is applied to the electrically conductive metal film winding at the time of reproduction, while on the other hand, a signal current is applied to the electrically conductive metal film winding at the time of recording.

摘要翻译： 在具有高阻抗且能够有效地检测阻抗变化的高频阻抗型磁头中，导电金属膜被夹在两个软磁膜之间，并且两个软磁膜形成磁路的一部分。 一个软磁膜的厚度小于另一软磁膜的厚度。 导电性金属薄膜的各自的端部具有一对电极，连接有用于向电极施加高频载波信号的振荡器和具有解调电路的高频放大器。 此外，提供导电金属膜绕组，并且在再现时将DC电流施加到导电金属膜绕组，而另一方面，信号电流施加到导电金属膜绕组上的导电金属膜绕组 录音时间

公开(公告)号：USRE38594E1

公开(公告)日：2004-09-21

申请号：US10016151

申请日：2001-11-02

申请人： Akio Murata ,  Akio Kuroe ,  Sayuri Muramatsu

发明人： Akio Murata ,  Akio Kuroe ,  Sayuri Muramatsu

IPC分类号： G11B517

CPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/03 ,  G11B5/1278 ,  G11B5/74 ,  G11B2005/0029

摘要： A magnetic head sensing apparatus includes a first, second and third magnetic core of a soft magnetic film formed by a thin film forming method. One end of the first and second magnetic core face a magnetic recording medium and are disposed with a predetermined distance therebetween field. The third magnetic core is disposed between the first and second magnetic cores. A conductive coil is wound around the third magnetic core. A conductive wire passes through the third magnetic core and is insulated therefrom. A DC-biased high-frequency constant current flows through the conductive wire to reproduce information recorded on the magnetic recording medium. Also, a recording signal is applied to the conductive coil sense the magnetic field.

公开(公告)号：US6028748A

公开(公告)日：2000-02-22

申请号：US869067

申请日：1997-06-04

申请人： Akio Kuroe ,  Akio Murata ,  Sayuri Muramatsu

发明人： Akio Kuroe ,  Akio Murata ,  Sayuri Muramatsu

IPC分类号： G11B21/21 ,  G11B5/33 ,  G11B5/48 ,  G11B21/02 ,  G11B21/16

CPC分类号： G11B5/484 ,  G11B5/33

摘要： A magnetic head unit of the present invention is provided with a magnetic head having a magnetic impedance element, and a head suspension for suspending the magnetic head is provided with a matching transmission line of one-fourth wavelength for transmitting a high-frequency signal output from the magnetic head.

摘要翻译： 本发明的磁头单元设置有具有磁阻抗元件的磁头，并且用于悬挂磁头的磁头悬架具有四分之一波长的匹配传输线，用于发送从第四波长输出的高频信号 磁头。

公开(公告)号：US06795263B2

公开(公告)日：2004-09-21

申请号：US10262121

申请日：2002-10-01

申请人： Akio Kuroe ,  Sayuri Muramatsu ,  Hirotsugu Fusayasu ,  Akio Murata

发明人： Akio Kuroe ,  Sayuri Muramatsu ,  Hirotsugu Fusayasu ,  Akio Murata

IPC分类号： G11B533

CPC分类号： G11B5/332

摘要： In a high-frequency impedance type magnetic head having high impedance and capable of efficiently detecting a change in impedance, an electrically conductive metal film is sandwiched between two soft magnetic films, and the two soft magnetic films form a portion of a magnetic path. The thickness of one soft magnetic film is smaller than the thickness of the other soft magnetic film. The electrically conductive metal thin film has a pair of electrodes at respective ends thereof, to which are connected an oscillator for applying a high frequency carrier signal to the electrodes and a high frequency amplifier having a demodulator circuit. Further, an electrically conductive metal film winding is provided, and a DC current is applied to the electrically conductive metal film winding at the time of reproduction, while on the other hand, a signal current is applied to the electrically conductive metal film winding at the time of recording.

摘要翻译： 在具有高阻抗且能够有效地检测阻抗变化的高频阻抗型磁头中，导电金属膜被夹在两个软磁膜之间，并且两个软磁膜形成磁路的一部分。 一个软磁膜的厚度小于另一软磁膜的厚度。 导电性金属薄膜的各自的端部具有一对电极，连接有用于向电极施加高频载波信号的振荡器和具有解调电路的高频放大器。 此外，提供导电金属膜绕组，并且在再现时将DC电流施加到导电金属膜绕组，而另一方面，信号电流施加到导电金属膜绕组上的导电金属膜绕组 录音时间

公开(公告)号：US5978186A

公开(公告)日：1999-11-02

申请号：US800155

申请日：1997-02-13

申请人： Akio Murata ,  Akio Kuroe ,  Sayuri Muramatsu

发明人： Akio Murata ,  Akio Kuroe ,  Sayuri Muramatsu

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/03 ,  G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/74

CPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/03 ,  G11B5/1278 ,  G11B5/74 ,  G11B2005/0029

摘要： A magnetic head includes a first, second and third magnetic core of a soft magnetic film formed by a thin film forming method. One end of the first and second magnetic core face a magnetic recording medium and are disposed with a predetermined distance therebetween. The third magnetic core is disposed between the first and second magnetic cores. A conductive coil is wound around the third magnetic core. A conductive wire passes through the third magnetic core and is insulated therefrom. A DC-biased high-frequency constant current flows through the conductive wire to reproduce information recorded on the magnetic recording medium. Also, a recording signal is applied to the conductive coil.

摘要翻译： 磁头包括通过薄膜形成方法形成的软磁膜的第一，第二和第三磁芯。 第一和第二磁芯的一端面对磁记录介质，并以它们之间的预定距离设置。 第三磁芯设置在第一和第二磁芯之间。 导电线圈缠绕在第三磁芯周围。 导线穿过第三磁芯并与之绝缘。 DC偏置的高频恒定电流流过导线以再现记录在磁记录介质上的信息。 此外，记录信号被施加到导电线圈。

公开(公告)号：US5835312A

公开(公告)日：1998-11-10

申请号：US743360

申请日：1996-11-04

申请人： Akio Kuroe ,  Akio Murata ,  Kazuo Yokoyama ,  Osamu Kusumoto

发明人： Akio Kuroe ,  Akio Murata ,  Kazuo Yokoyama ,  Osamu Kusumoto

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39 ,  G11B5/48 ,  G11B5/58 ,  G11B9/00 ,  G11B9/04

CPC分类号： B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/1278 ,  G11B5/3106 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/33 ,  G11B5/332 ,  G11B5/4826 ,  G11B5/484 ,  G11B5/58 ,  G11B2005/0005 ,  G11B9/14 ,  G11B9/1418

摘要： The present invention relates to a magnetic head for recording and reproducing signals from a magnetic recording medium, wherein the magnetic head comprises a stylus having a pair of electrodes, a conductive multilayer film having a staircase-shaped section, and a magnetic body formed on the multilayer film. The magnetic head further comprises an excitation conductive thin film disposed so as to surround the stylus, a magnetic yoke forming a closed magnetic loop together with a magnetic recording medium and the stylus, and an anti-abrasive film formed on the magnetic yoke so as to oppose the recording medium. During recording, a signal current is supplied to the excitation conductive thin film to generate a recording magnetic field from the end of the stylus. During reproduction, a high-frequency voltage is applied across the electrodes, and a magnetic impedance change of the stylus, caused by a signal magnetism on the recording medium, is detected. The relative position of the magnetic head to the recording medium is controlled by deflecting a cantilever according to a capacitance between the magnetic head and the recording medium. Accordingly, the magnetic head of the present invention is capable of remarkably enhancing recording densities and data transfer rates.

摘要翻译： 本发明涉及一种用于记录和再现来自磁记录介质的信号的磁头，其中磁头包括具有一对电极的触针，具有阶梯形截面的导电多层膜和形成在其上的磁体 多层膜。 磁头还包括设置成围绕触针的激励导电薄膜，与磁记录介质和触针一起形成闭合磁环的磁轭，以及形成在磁轭上的抗磨膜，以便 对着记录介质。 在记录期间，向激励导电薄膜提供信号电流以从触针的端部产生记录磁场。 在再现期间，在电极之间施加高频电压，并且检测由记录介质上的信号磁性引起的触针的磁阻抗变化。 通过根据磁头和记录介质之间的电容使悬臂偏转来控制磁头与记录介质的相对位置。 因此，本发明的磁头能够显着提高记录密度和数据传送速率。

公开(公告)号：US5247411A

公开(公告)日：1993-09-21

申请号：US787613

申请日：1991-11-04

申请人： Takaaki Maegawa ,  Yoshihiko Morioka ,  Masaru Higashionji ,  Akio Kuroe

发明人： Takaaki Maegawa ,  Yoshihiko Morioka ,  Masaru Higashionji ,  Akio Kuroe

IPC分类号： G11B5/29 ,  G11B5/105 ,  G11B5/53

CPC分类号： G11B5/105 ,  G11B5/531

摘要： In the magnetic recording characteristics of recording apparatus, when there are three or more magnetic tips disposed on one head base, the extension lines in the depth direction of the head tips pass through the central line of the cylinder. The both outermost head tips on the head base disposed in one window of the cylinder possess head gaps as dummy head, but do not have the function of magnetic recording characteristics of recording, reproducing and erasing. In the disclosed multiple magnetic head, the materials of the head tips on one head base including the dummy head are the same.

摘要翻译： 在记录装置的磁记录特性中，当在一个头基座上设置三个或更多个磁头时，头尖深度方向上的延伸线通过气缸的中心线。 设置在圆筒的一个窗口中的头基部上的两个最外面的头部尖端具有作为虚拟头部的头部间隙，但是不具有记录，再现和擦除的磁记录特性的功能。 在公开的多个磁头中，包括虚拟磁头的一个磁头基座上的磁头尖端的材料是相同的。

公开(公告)号：US4841401A

公开(公告)日：1989-06-20

申请号：US224215

申请日：1988-07-25

申请人： Mitsuo Satomi ,  Akio Kuroe ,  Eisuke Sawai ,  Masaru Higashionji ,  Hiroshi Sakakima ,  Kenji Kondo

发明人： Mitsuo Satomi ,  Akio Kuroe ,  Eisuke Sawai ,  Masaru Higashionji ,  Hiroshi Sakakima ,  Kenji Kondo

IPC分类号： G11B5/127 ,  G11B5/147

CPC分类号： G11B5/147

摘要： A magnetic head includes magnetic cores formed by sputter layers of an amorphous magnetic alloy formed on a non-magnetic substrate (1). A non-magnetic ceramic layer is provided on one amorphous magnetic alloy layer, and a non-magnetic substrate is bonded thereon by a bonding glass layer. The one amorphous magnetic alloy sputter layer is isolated from the bonding glass layer by the non-magnetic ceramic layer to prevent the quality of the bonding glass layer from deteriorating thus a stronger bonding force is maintained. The bonding of the amorphous ceramic layer with respect to the one amorphous magnetic alloy layer is strong, thus providing a magnetic head having high reliability.

摘要翻译： PCT No.PCT / JP84 / 00037 Sec。 371日期1984年10月9日第 102（e）日期1984年10月9日PCT提交1984年2月9日PCT公布。 公开号WO84 / 03167 日期1984年8月16日。磁头包括由形成在非磁性基板（1）上的非晶磁合金的溅射层形成的磁芯。 在非晶磁性合金层上设置非磁性陶瓷层，通过接合玻璃层将非磁性基板粘接在其上。 通过非磁性陶瓷层将一个非晶磁性合金溅射层与粘合玻璃层隔离，以防止接合玻璃层的质量劣化，从而保持更强的粘结力。 无定形陶瓷层相对于一个非晶磁性合金层的结合很强，从而提供了具有高可靠性的磁头。