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1. 发明授权

US07145331B2 Magnetic sensor having a closed magnetic path formed by soft magnetic films 失效
标题翻译：具有由软磁膜形成的闭合磁路的磁传感器
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。

2. 发明授权

US07183767B2 Magnetic sensing element, magnetic sensor, and its manufacturing method 失效
标题翻译：磁传感元件，磁传感器及其制造方法
公开(公告)号：US07183767B2
公开(公告)日：2007-02-27
申请号：US10506556
申请日：2003-03-24
申请人： Sayuri Muramatsu , Ken Takahashi , Yoshihiro Tosaki , Akio Murata
发明人： Sayuri Muramatsu , Ken Takahashi , Yoshihiro Tosaki , Akio Murata
IPC分类号： G01R33/02 , G01R33/00
CPC分类号： G01R33/02
摘要： A conductive wire held between a first magnetic core of a soft magnetic film and a second magnetic core, the area of the cross-section, perpendicular to a magnetic path, of which is made partially smaller constitutes a magnetic detection device, and a DC current for generating a DC bias magnetic field and a high-frequency carrier signal are let to flow through the conductive wire. The DC current is selected so that the portion at which the cross-sectional area of the above-mentioned second magnetic core is made smaller has an appropriate DC bias magnetic field intensity. When this magnetic detection device is placed in an external magnetic field, the intensity of the DC bias magnetic field changes depending on the intensity of the external magnetic field; hence, the level of the carrier signal in the conductive wire changes. The change of the level of the carrier signal is output as the change of an electrical signal, whereby the intensity and direction of the magnetic field are detected.
摘要翻译：保持在软磁性膜的第一磁芯和第二磁芯之间的导线，垂直于磁路的横截面的面积部分较小构成磁检测装置，并且DC电流用于产生DC偏置磁场和高频载波信号使其流过导线。选择直流电流使得使上述第二磁芯的横截面积减小的部分具有适当的DC偏置磁场强度。当该磁检测装置被置于外部磁场中时，直流偏置磁场的强度根据外部磁场的强度而变化; 因此，导线中的载波信号的电平变化。输出载波信号电平的变化作为电信号的变化，由此检测磁场的强度和方向。

3. 发明申请

US20050179431A1 Magnetic sensing element magnetic sensor and its manufacturing method 失效
标题翻译：磁传感元件磁传感器及其制造方法
公开(公告)号：US20050179431A1
公开(公告)日：2005-08-18
申请号：US10506556
申请日：2003-03-24
申请人： Sayuri Muramatsu , Ken Takahashi , Yoshihiro Tosaki , Akio Murata
发明人： Sayuri Muramatsu , Ken Takahashi , Yoshihiro Tosaki , Akio Murata
IPC分类号： G01R33/02 , G01R33/00
CPC分类号： G01R33/02
摘要： A conductive wire held between a first magnetic core of a soft magnetic film and a second magnetic core, the area of the cross-section, perpendicular to a magnetic path, of which is made partially smaller constitutes a magnetic detection device, and a DC current for generating a DC bias magnetic field and a high-frequency carrier signal are let to flow through the conductive wire. The DC current is selected so that the portion at which the cross-sectional area of the above-mentioned second magnetic core is made smaller has an appropriate DC bias magnetic field intensity. When this magnetic detection device is placed in an external magnetic field, the intensity of the DC bias magnetic field changes depending on the intensity of the external magnetic field; hence, the level of the carrier signal in the conductive wire changes. The change of the level of the carrier signal is output as the change of an electrical signal, whereby the intensity and direction of the magnetic field are detected.
摘要翻译：保持在软磁性膜的第一磁芯和第二磁芯之间的导线，垂直于磁路的横截面的面积部分较小构成磁检测装置，并且DC电流用于产生DC偏置磁场和高频载波信号使其流过导线。选择直流电流使得使上述第二磁芯的横截面积减小的部分具有适当的DC偏置磁场强度。当该磁检测装置被置于外部磁场中时，直流偏置磁场的强度根据外部磁场的强度而变化; 因此，导线中的载波信号的电平变化。输出载波信号电平的变化作为电信号的变化，由此检测磁场的强度和方向。

4. 再颁专利

USRE38594E1 Magnetic sensing apparatus having a central core with wire therethrough 失效
标题翻译：磁感测装置具有中心芯，其中穿过其中的导线
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.

5. 发明授权

US6028748A Magnetic head apparatus including a quarter wavelength transmission line 失效
标题翻译：包括四分之一波长传输线的磁头装置
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。

6. 发明授权

US06795263B2 Magnetic head 失效
标题翻译：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

7. 发明授权

US06590740B2 Shielded magnetic head and magnetic reproducing apparatus 失效
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.

8. 发明授权

US06538843B1 Magnetic head 失效
标题翻译：磁头
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

9. 发明授权

US5978186A Magnetic head and reproducing apparatus with head having central core with winding thereabout and wire therethrough 失效
标题翻译：磁头和再现装置，其头部具有中心芯，绕其上方和电线通过
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。

10. 发明授权

US5835312A Magnetic head for use with a recording medium 失效
标题翻译：用于记录介质的磁头
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。

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