公开(公告)号：US4861398A

公开(公告)日：1989-08-29

申请号：US123278

申请日：1987-11-20

申请人： Hirotsugu Fukuoka ,  Kanji Kawakami ,  Makoto Aihara ,  Mitsuo Suda ,  Kouji Takeshita ,  Yukihiro Isono

发明人： Hirotsugu Fukuoka ,  Kanji Kawakami ,  Makoto Aihara ,  Mitsuo Suda ,  Kouji Takeshita ,  Yukihiro Isono

IPC分类号： G11B5/31 ,  G11B5/455

CPC分类号： G11B5/3166 ,  G11B5/455 ,  Y10T29/49036 ,  Y10T29/49044 ,  Y10T29/49046

摘要： DC bias currents are applied to a conducting wire of a thin film magnetic head to be inspected. When the DC bias currents (I.sub.0, I.sub.1, I.sub.2) are supplied to the conducting wire, the impedances (Z.sub.0, Z.sub.1, Z.sub.2) corresponding to the DC bias currents are measured. When a ratio (.vertline.Z.sub.1 -Z.sub.0 .vertline./.vertline.Z.sub.2 -Z.sub.0 .vertline.) corresponding to an overwrite characteristic (OW) reaches to a predetermined value by lapping tip portions of an upper magnetic layer and a lower magnetic layer of the magnetic head, the lapping process of the magnetic head is finished.

摘要翻译： 将直流偏置电流施加到待检查的薄膜磁头的导线上。 当直流偏置电流（I0，I1，I2）被提供给导线时，测量对应于直流偏置电流的阻抗（Z0，Z1，Z2）。 当通过研磨磁头的上部磁性层和下部磁性层的尖端部分而将与覆盖特性（OW）相对应的比率（| Z1-Z0 | / | Z2-Z0））达到预定值时，研磨 磁头的处理完成。

公开(公告)号：US5541789A

公开(公告)日：1996-07-30

申请号：US450148

申请日：1995-05-26

申请人： Hirotsugu Fukuoka ,  Hiroshi Fukui ,  Mitsuo Suda ,  Yutaka Sugita ,  Kanji Kawakami

发明人： Hirotsugu Fukuoka ,  Hiroshi Fukui ,  Mitsuo Suda ,  Yutaka Sugita ,  Kanji Kawakami

IPC分类号： G11B21/21 ,  G11B5/60 ,  G11B5/48

CPC分类号： G11B5/6005

摘要： A magnetic recording device includes a magnetic disk for storing information, a magnetic head for writing and reading information relative to the magnetic disk, a device for rotating the magnetic disk relative to the magnetic head in such a manner that speed of said magnetic disk relative to the magnetic head is 6 to 40 m/s at an innermost track of the magnetic disk, and a device for applying a load to the magnetic head so that a gap between the magnetic disk and the magnetic head disposed in opposed relation to the magnetic disk can be kept to not more than 0.1 .mu.m.

摘要翻译： 磁记录装置包括用于存储信息的磁盘，用于写入和读取相对于磁盘的信息的磁头，用于使磁盘相对于磁头旋转的装置，使得所述磁盘的速度相对于 磁头在磁盘的最内侧轨道上为6〜40m / s，以及用于向磁头施加负荷使得与磁盘相对设置的磁盘与磁头之间的间隙的装置 可以保持在不超过0.1亩。

公开(公告)号：US5671107A

公开(公告)日：1997-09-23

申请号：US399221

申请日：1995-03-06

申请人： Katsuya Mitsuoka ,  Hiroshi Fukui ,  Makoto Aihara ,  Masanori Tanabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Yutaka Sugita ,  Yoshihiro Shiroishi ,  Hajime Aoi ,  Yokuo Saitoh ,  Kanji Kawakami ,  Yoshikazu Tsuji ,  Masaaki Hayashi ,  Kazuo Nakagoshi

发明人： Katsuya Mitsuoka ,  Hiroshi Fukui ,  Makoto Aihara ,  Masanori Tanabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Yutaka Sugita ,  Yoshihiro Shiroishi ,  Hajime Aoi ,  Yokuo Saitoh ,  Kanji Kawakami ,  Yoshikazu Tsuji ,  Masaaki Hayashi ,  Kazuo Nakagoshi

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/31 ,  G11B5/60

CPC分类号： G11B5/012 ,  G11B5/39

摘要： A magnetic disc apparatus has a large recording density of 120 megabits per square inch or more, and defines a relationship among a pole thickness (Pt) of thin-film magnetic heads disposed in the magnetic disc apparatus, and a saturation flux density (Bs) of cores of the heads and a recording wavelength (.lambda.) for the thin film magnetic discs have a coercivity of 1800 Oe or more, wherein a levitation space between the head and the disc is 0.15 .mu.m or less.

摘要翻译： 磁盘装置具有120兆比特每平方英寸或更大的记录密度，并且限定了设置在磁盘装置中的薄膜磁头的极厚度（Pt）与饱和磁通密度（Bs）之间的关系， 的磁头的磁芯和用于薄膜磁盘的记录波长（λ）具有1800Oe或更高的矫顽力，其中磁头和磁盘之间的悬浮空间为0.15μm或更小。

公开(公告)号：US5307214A

公开(公告)日：1994-04-26

申请号：US848137

申请日：1992-03-09

申请人： Kanji Kawakami ,  Yoshiakira Karakama ,  Masayuki Takagi ,  Takayoshi Ohtsu ,  Hisayasu Honma ,  Tetsuo Kobayashi ,  Yutaka Sugita ,  Katsuya Mitsuoka

发明人： Kanji Kawakami ,  Yoshiakira Karakama ,  Masayuki Takagi ,  Takayoshi Ohtsu ,  Hisayasu Honma ,  Tetsuo Kobayashi ,  Yutaka Sugita ,  Katsuya Mitsuoka

IPC分类号： G11B5/09 ,  G11B5/465 ,  G11B19/04 ,  G11B15/12

CPC分类号： G11B5/09 ,  G11B19/04 ,  G11B5/465

摘要： A magnetic recording apparatus for recording information on a magnetic recording medium. A circuit for generates a recording current pulse train and supplies the pulse train to a magnetic head. The last pulse of the recording current pulse train dampled waveform. A ripple current is superposed on the damped waveform.

摘要翻译： 一种用于在磁记录介质上记录信息的磁记录装置。 一种用于产生记录电流脉冲串并将脉冲串提供给磁头的电路。 记录电流脉冲序列的最后脉冲波形波形。 纹波电流叠加在阻尼波形上。

公开(公告)号：US5079662A

公开(公告)日：1992-01-07

申请号：US413329

申请日：1989-09-27

申请人： Kanji Kawakami ,  Yokuo Saitoh ,  Tetsuo Kobayashi ,  Takayoshi Ohtsu ,  Hiroshi Fukui ,  Yamagata, deceased, Koji ,  by Tetsuji Yamagata, legal representative ,  by Reiko Yamagata, legal representative

发明人： Kanji Kawakami ,  Yokuo Saitoh ,  Tetsuo Kobayashi ,  Takayoshi Ohtsu ,  Hiroshi Fukui ,  Yamagata, deceased, Koji ,  by Tetsuji Yamagata, legal representative ,  by Reiko Yamagata, legal representative

IPC分类号： G11B5/31 ,  G11B5/33 ,  G11B5/39

CPC分类号： G11B5/3967 ,  G11B5/332

摘要： A compound magnetic head includes first and second magnetic poles arranged to face each other to define a recording gap therebetween, a magnetic film arranged between the first and second magnetic poles, a first non-magnetic film arranged between the first magnetic pole and the magnetic film to define a first reproducing gap therebetween, and a second non-magnetic film arranged between the second magnetic pole and the magnetic pole to define a second reproducing gap therebetween. The recording gap and the first and second reproducing gaps have the same width and a common center line of the gap widths parallel to the direction of movement of a magnetic recording medium.

摘要翻译： 复合磁头包括布置成彼此面对以限定它们之间的记录间隙的第一和第二磁极，布置在第一和第二磁极之间的磁性膜，布置在第一磁极和磁性膜之间的第一非磁性膜 以限定它们之间的第一再现间隙，以及布置在第二磁极和磁极之间的第二非磁性膜，以在它们之间限定第二再现间隙。 记录间隙和第一和第二再现间隙具有与磁记录介质的移动方向平行的间隙宽度相同的宽度和公共中心线。

公开(公告)号：US4949209A

公开(公告)日：1990-08-14

申请号：US231505

申请日：1988-08-12

申请人： Tadashi Imanaka ,  Tetsuo Kobayashi ,  Harunobu Saito ,  Osamu Hirai ,  Kanji Kawakami

发明人： Tadashi Imanaka ,  Tetsuo Kobayashi ,  Harunobu Saito ,  Osamu Hirai ,  Kanji Kawakami

IPC分类号： G11B5/31

CPC分类号： G11B5/3106 ,  G11B5/313

摘要： In a thin-film magnetic head having a magnetic core (upper magnetic layer), in the electromagnetic conversion section, which are composed of an upper first magnetic film, inorganic insulating film, and an upper second magnetic film, the upper first magnetic film is used as a second wiring for electrical continuity between the coil and input/output terminal. The upper first magnetic film is connected to the center of a coil which is of a single-layer structure. The first upper magnetic film is made of a same material as the coil and is formed simultaneously with the latter. In the region in which an input/output terminal backing is formed, the upper first magnetic film of a second wiring is removed. Thus, the electrical continuity is established between the input/output terminal and the center of the coil.Also, the utilization of the upper first magnetic film as second wiring is applicable to a thin-film magnetic head having a coil of a multi-layer structure.

公开(公告)号：US4604899A

公开(公告)日：1986-08-12

申请号：US597753

申请日：1984-04-06

申请人： Kazuji Yamada ,  Hideo Sato ,  Kanji Kawakami ,  Kazuo Kato ,  Takao Sasayama

发明人： Kazuji Yamada ,  Hideo Sato ,  Kanji Kawakami ,  Kazuo Kato ,  Takao Sasayama

IPC分类号： G01R27/02 ,  G01B7/16 ,  G01D3/028 ,  G01L1/22 ,  G01L9/00 ,  G01L9/04 ,  G01L9/06 ,  G01L19/04

CPC分类号： G01L1/2281 ,  G01L9/065

摘要： A semiconductor-type pressure transducer is disclosed in which the pressure change is detected as a resistance change by use of a bridge circuit including at least a gauge resistor changing with an external force. Each gauge resistor is made of a PN junction of a semiconductor. The pressure transducer further comprises an amplification factor compensator for cancelling the effect of the temperature change of the gauge resistors making up the bridge circuit on the amplification factor of the amplification circuit for amplifying the output of the bridge circuit.

摘要翻译： 公开了一种半导体型压力传感器，其中通过使用至少包括用外力改变的量规电阻器的桥式电路将压力变化检测为电阻变化。 每个规格电阻由半导体的PN结制成。 压力传感器还包括放大系数补偿器，用于抵消构成桥式电路的量规电阻器的温度变化对放大电路的放大系数的影响，用于放大桥式电路的输出。

公开(公告)号：US4591780A

公开(公告)日：1986-05-27

申请号：US559467

申请日：1983-12-08

申请人： Kazuji Yamada ,  Ryoichi Kobayashi ,  Yasuo Nagai ,  Isao Shimizu ,  Kanji Kawakami

发明人： Kazuji Yamada ,  Ryoichi Kobayashi ,  Yasuo Nagai ,  Isao Shimizu ,  Kanji Kawakami

IPC分类号： H03F3/343 ,  G05F3/26 ,  G05F3/30 ,  H03F3/34 ,  H03F3/347 ,  G05F3/20

CPC分类号： G05F3/30 ,  G05F3/265

摘要： A current source device controls a rate of change of current flowing through a load so that the change rate of the current is equal to a change rate of a fluctuating supply voltage. A first transistor is fed with the supply voltage via a first resistor connected to its collector and a second resistor connected to its emitter. A second transistor has a base connected to a base of the first transistor, an emitter connected to a third resistor and a collector connected to a load. A current to the load is fed from the supply voltage via the load, the collector and emitter of the second transistor and the third resistor. The collector and base of the first transistor are respectively connected to a base and an emitter of a third transistor having a collector fed with the supply voltage. The ratio between a voltage drop caused across the second resistor by a reference current flowing through the first resistor, the collector and emitter of the first transistor and the second resistor, and a voltage drop caused across the third resistor by an emitter current of the second transistor, which is substantially equal to a collector current of the second transistor flowing through the load, is set to a predetermined value. The emitter area of the second transistor is enlarged beyond that of the first transistor to obtain a sufficiently large output current.

摘要翻译： 电流源装置控制流过负载的电流的变化率，使得电流的变化率等于电源电压波动的变化率。 第一晶体管经由连接到其集电极的第一电阻器和连接到其发射极的第二电阻器馈送电源电压。 第二晶体管具有连接到第一晶体管的基极的基极，连接到第三电阻器的发射极和连接到负载的集电极。 通过负载，第二晶体管的集电极和发射极以及第三电阻从供电电压馈送到负载的电流。 第一晶体管的集电极和基极分别连接到具有馈送有电源电压的集电极的第三晶体管的基极和发射极。 通过流过第一电阻器的参考电流，第一晶体管的集电极和发射极以及第二电阻器在第二电阻器之间引起的电压降之间的比率以及由第二电阻器的发射极电流引起的第三电阻器的电压降 基本上等于流过负载的第二晶体管的集电极电流的晶体管被​​设定为预定值。 第二晶体管的发射极面积比第一晶体管的发射极面积增大，以获得足够大的输出电流。

公开(公告)号：US4556807A

公开(公告)日：1985-12-03

申请号：US522227

申请日：1983-08-11

申请人： Kazuji Yamada ,  Hideo Sato ,  Kazuo Kato ,  Takao Sasayama ,  Kanji Kawakami ,  Ryosaku Kanzawa

发明人： Kazuji Yamada ,  Hideo Sato ,  Kazuo Kato ,  Takao Sasayama ,  Kanji Kawakami ,  Ryosaku Kanzawa

IPC分类号： G01L9/04 ,  G01B7/16 ,  G01L9/00 ,  G01L9/06

CPC分类号： G01L9/0054 ,  G01L9/065 ,  Y10S323/907

摘要： A pressure transducer is disclosed comprising a pressure sensor portion having gage resistors in bridge formed on a thin diaphragm of a semiconductor substrate, and a power supply connected to the pressure sensor portion for driving the pressure sensor. The power supply includes a first current source for supplying a temperature-dependent current equivalent to the sum of a current almost proportional to the absolute temperature and a current independent of temperature, and a second current source for sinking the current almost proportional to the temperature characteristic of the gage resistors from the current of the first current source. A temperature compensation circuit is additionally provided to drive the bridge circuit by the difference between the temperature-dependent current and the current proportional to the temperature characteristic in a constant-current driving mode, and by a voltage proportional to the current difference when the output of the bridge circuit is connected to an amplifier whose gain is dependent on temperature.

摘要翻译： 公开了一种压力传感器，包括压电传感器部分，该压力传感器部分具有形成在半导体衬底的薄膜上的桥中的量规电阻器，以及连接到用于驱动压力传感器的压力传感器部分的电源。 电源包括用于提供等效于与绝对温度几乎成比例的电流和独立于温度的电流的和的温度相关电流的第一电流源，以及用于将大体上与温度特性成比例的电流吸收的第二电流源 的电流从第一个电流源的电流。 另外提供温度补偿电路以通过温度相关电流和与恒定电流驱动模式中的温度特性成比例的电流之间的差异来驱动桥式电路，并且通过与当电流差异的电流成比例的电压来驱动桥式电路 桥接电路连接到增益取决于温度的放大器。

公开(公告)号：US4503394A

公开(公告)日：1985-03-05

申请号：US390882

申请日：1982-06-22

申请人： Kanji Kawakami ,  Shinji Narishige ,  Masahide Suenaga

发明人： Kanji Kawakami ,  Shinji Narishige ,  Masahide Suenaga

IPC分类号： G01R33/09 ,  G11B5/39 ,  H01L43/00 ,  H01L43/08 ,  G01R33/06 ,  G11B5/12

CPC分类号： G11B5/3935 ,  G01R33/09 ,  G11B5/3964 ,  G11B5/3987 ,  G11B5/399 ,  H01L43/00 ,  H01L43/08

摘要： A magnetoelectric conversion element comprises a magnetoresistive effect material having a closed domain structure, a pair of contacts for supply of current flowing through the magnetoresistive effect material, and a bias electrode disposed between the contacts for biasing the direction of the current flow. The bias electrode is disposed so that the respective angles of intersection between the directions of current flow through different magnetic domains of the magnetoresistive effect material biased by the bias electrode and the directions of spontaneous magnetization biased by an external magnetic field are both increased or decreased.

摘要翻译： 磁电转换元件包括具有封闭畴结构的磁阻效应材料，用于供应流过磁阻效应材料的电流的一对触点，以及设置在触点之间以偏置电流方向的偏置电极。 偏置电极被设置为使得通过由偏置电极偏置的磁阻效应材料的不同磁畴的电流方向和由外部磁场偏置的自发磁化方向之间的相互交叉的角度的相互交叉的角度都增加或减少。