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21. 发明申请

US20060256481A1 Composite thin-film magnetic head, magnetic head assembly and magnetic disk drive apparatus 有权
标题翻译：复合薄膜磁头，磁头组件和磁盘驱动装置
公开(公告)号：US20060256481A1
公开(公告)日：2006-11-16
申请号：US11393775
申请日：2006-03-31
申请人： Takeo Kagami , Hiroshi Kiyono , Hiraku Hirabayashi , Eiichi Omata , Seiji Yari , Takamitsu Sakamoto
发明人： Takeo Kagami , Hiroshi Kiyono , Hiraku Hirabayashi , Eiichi Omata , Seiji Yari , Takamitsu Sakamoto
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/3116 , G11B5/11 , G11B5/3133 , G11B5/3146 , G11B5/3967 , G11B5/6064 , G11B2005/0005
摘要： A composite thin-film magnetic head includes a substrate, an under layer formed on the substrate, an MR read head element formed on the under layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a direction perpendicular to a surface of the MR layer through the upper shield layer and the lower shield layer, an inter-shield insulation layer laminated on the MR read head element, an inductive write head element formed on the inter-shield insulation layer and provided with a first magnetic pole layer, a nonmagnetic layer, a second magnetic pole layer whose end portion is opposed to an end portion of the first magnetic pole layer through the nonmagnetic layer, and a write coil, and an additional shield layer formed between the upper shield layer and the first magnetic pole layer.
摘要翻译：复合薄膜磁头包括基板，形成在基板上的下层，形成在下层上并设置有下屏蔽层，上屏蔽层和MR层的MR读头元件，其中感测电流通过上屏蔽层和下屏蔽层在垂直于MR层的表面的方向上流动，层叠在MR读头元件上的屏蔽间绝缘层，形成在屏蔽间绝缘层上的感应写头元件并且具有第一磁极层，非磁性层，其端部通过非磁性层与第一磁极层的端部相对的第二磁极层和写入线圈，以及形成在第一磁极层之间的附加屏蔽层上屏蔽层和第一磁极层。

22. 发明授权

US08909489B2 Rotating field sensor 有权
标题翻译：旋转场传感器
公开(公告)号：US08909489B2
公开(公告)日：2014-12-09
申请号：US13176485
申请日：2011-07-05
申请人： Shunji Saruki , Hiraku Hirabayashi , Yosuke Komasaki
发明人： Shunji Saruki , Hiraku Hirabayashi , Yosuke Komasaki
IPC分类号： G01R33/09 , B82Y25/00 , G01D5/14
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145
摘要： A first detection unit has first and second detection circuits. A second detection unit has third and fourth detection circuits. Output signals of the second and fourth detection circuits differ from output signals of the first and third detection circuits in phase, respectively, by an odd number of times ¼ the signal period. The output signal of the third detection circuit differs from the output signal of the first detection circuit in phase by an integer multiple of ⅙ the signal period other than an integer multiple of ½ the signal period. A rotating field sensor generates a first signal based on the output signals of the first and third detection circuits, generates a second signal based on the output signals of the second and fourth detection circuits, and calculates a detected angle value based on the first and second signals.
摘要翻译：第一检测单元具有第一和第二检测电路。第二检测单元具有第三和第四检测电路。第二和第四检测电路的输出信号分别与第一和第三检测电路的输出信号分别相差奇数倍的信号周期。第三检测电路的输出信号与第一检测电路的输出信号相位不同于信号周期的整数倍，除了信号周期的1/2的整数倍。旋转场传感器基于第一和第三检测电路的输出信号产生第一信号，基于第二和第四检测电路的输出信号产生第二信号，并基于第一和第二检测电路计算检测角度值信号。

23. 发明授权

US08604780B2 Rotating field sensor 有权
标题翻译：旋转场传感器
公开(公告)号：US08604780B2
公开(公告)日：2013-12-10
申请号：US13164427
申请日：2011-06-20
申请人： Shunji Saruki , Hiraku Hirabayashi
发明人： Shunji Saruki , Hiraku Hirabayashi
IPC分类号： G01B7/30 , G01B7/14
CPC分类号： G01R33/091 , G01D5/145
摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit located in the first position has first and second detection circuits whose output signals differ in phase by ¼ the period. A second detection unit located in the second position has third and fourth detection circuits whose output signals differ in phase by ¼ the period. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on a first signal generated from the output signals of the first and third detection circuits and a second signal generated from the output signals of the second and fourth detection circuits.
摘要翻译：场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。位于第一位置的第一检测单元具有第一和第二检测电路，其输出信号的相位相差1/4。位于第二位置的第二检测单元具有第三和第四检测电路，其输出信号的相位相差1/4。基于从第一和第三检测电路的输出信号产生的第一信号和从第一和第三检测电路产生的第二信号来计算基准位置中相对于参考方向形成的旋转磁场的方向的角度的检测值第二和第四检测电路的输出信号。

24. 发明授权

US08593139B2 Magnetic sensor 有权
标题翻译：磁传感器
公开(公告)号：US08593139B2
公开(公告)日：2013-11-26
申请号：US12947328
申请日：2010-11-16
申请人： Naoki Ohta , Hiraku Hirabayashi , Masanori Sakai , Hiroshi Naganuma
发明人： Naoki Ohta , Hiraku Hirabayashi , Masanori Sakai , Hiroshi Naganuma
IPC分类号： G01R33/02
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/0029
摘要： A magnetic sensor includes a spin valve-type magneto-resistive element, a voltage detection part, a coil, and a current control part, the coil being configured to apply a measuring magnetic field to the spin valve-type magneto-resistive element upon application of a current, the voltage detection part being configured to output a detection signal to the current control part upon detecting an output voltage of the spin valve-type magneto-resistive element reaching a predetermined voltage value, the current control part being configured to control the current to unidirectionally increase or unidirectionally decrease a strength of the measuring magnetic field from an initial value, but upon input of the detection signal, control the current to return the strength of the measuring magnetic field to the initial value, the initial value being a magnetic field strength where the spin valve-type magneto-resistive element reaches saturation magnetization.
摘要翻译：磁传感器包括自旋阀型磁阻元件，电压检测部件，线圈和电流控制部件，该线圈被配置为在应用时向自旋阀型磁阻元件施加测量磁场电流检测部分被配置为在检测到自旋阀型磁阻元件的输出电压达到预定电压值时将检测信号输出到电流控制部分，该电流控制部分被配置为控制电流控制部分电流从初始值单向增加或单向地降低测量磁场的强度，但是当输入检测信号时，控制电流将测量磁场的强度返回到初始值，初始值为磁自旋阀型磁阻元件达到饱和磁化强度的场强。

25. 发明授权

US08589105B2 Rotating field sensor 有权
标题翻译：旋转场传感器
公开(公告)号：US08589105B2
公开(公告)日：2013-11-19
申请号：US13187942
申请日：2011-07-21
申请人： Yosuke Komasaki , Hiraku Hirabayashi
发明人： Yosuke Komasaki , Hiraku Hirabayashi
IPC分类号： G01R35/00 , G01B7/30
CPC分类号： G01D5/145 , G01D3/036
摘要： An angle detection unit including first to third arithmetic units receives first and second signals that are associated with intensities of components of a rotating magnetic field in mutually different directions. The first arithmetic unit generates a sum of squares signal made up of the sum of squares of the first and second signals. Based on the sum of squares signal, the second arithmetic unit calculates a first error component estimate which is an estimated value of a first error component included in the first signal and a second error component estimate which is an estimated value of a second error component included in the second signal. The third arithmetic unit generates a first corrected signal by subtracting the first error component estimate from the first signal, generates a second corrected signal by subtracting the second error component estimate from the second signal, and calculates a detected angle value based on the first and second corrected signals.
摘要翻译：包括第一至第三运算单元的角度检测单元接收与相互不同方向的旋转磁场的分量的强度相关联的第一和第二信号。第一算术单元产生由第一和第二信号的平方和组成的平方和信号。基于平方和信号，第二算术单元计算第一误差分量估计，其是包括在第一信号中的第一误差分量的估计值和作为包括的第二误差分量的估计值的第二误差分量估计在第二个信号。第三算术单元通过从第一信号中减去第一误差分量估计来产生第一校正信号，通过从第二信号中减去第二误差分量估计来产生第二校正信号，并且基于第一和第二运算单元计算检测角度值校正信号。

26. 发明申请

US20110221433A1 MAGNETIC SENSOR 有权
标题翻译：磁传感器
公开(公告)号：US20110221433A1
公开(公告)日：2011-09-15
申请号：US12947328
申请日：2010-11-16
申请人： Naoki OHTA , Hiraku Hirabayashi , Masanori Sakai , Hiroshi Naganuma
发明人： Naoki OHTA , Hiraku Hirabayashi , Masanori Sakai , Hiroshi Naganuma
IPC分类号： G01R33/02
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/0029
摘要： A magnetic sensor includes a spin valve-type magneto-resistive element, a voltage detection part, a coil, and a current control part, the coil being configured to apply a measuring magnetic field to the spin valve-type magneto-resistive element upon application of a current, the voltage detection part being configured to output a detection signal to the current control part upon detecting an output voltage of the spin valve-type magneto-resistive element reaching a predetermined voltage value, the current control part being configured to control the current to unidirectionally increase or unidirectionally decrease a strength of the measuring magnetic field from an initial value, but upon input of the detection signal, control the current to return the strength of the measuring magnetic field to the initial value, the initial value being a magnetic field strength where the spin valve-type magneto-resistive element reaches saturation magnetization.
摘要翻译：磁传感器包括自旋阀型磁阻元件，电压检测部件，线圈和电流控制部件，该线圈被配置为在应用时向自旋阀型磁阻元件施加测量磁场电流检测部分被配置为在检测到自旋阀型磁阻元件的输出电压达到预定电压值时将检测信号输出到电流控制部分，该电流控制部分被配置为控制电流控制部分电流从初始值单向增加或单向地降低测量磁场的强度，但是当输入检测信号时，控制电流将测量磁场的强度返回到初始值，初始值为磁自旋阀型磁阻元件达到饱和磁化强度的场强。

27. 发明授权

US07924533B2 Multi-channel head 有权
标题翻译：多通道头
公开(公告)号：US07924533B2
公开(公告)日：2011-04-12
申请号：US11740530
申请日：2007-04-26
申请人： Kazuhiko Maejima , Yoshiyuki Mizoguchi , Nobuya Oyama , Hiraku Hirabayashi , Hiroki Matsukuma , Naoto Matono
发明人： Kazuhiko Maejima , Yoshiyuki Mizoguchi , Nobuya Oyama , Hiraku Hirabayashi , Hiroki Matsukuma , Naoto Matono
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/584 , G11B5/00821
摘要： A multi-channel head includes a substrate, a plurality of write elements arranged in a track width direction above the substrate in a lamination direction, and a plurality of read elements arranged in the track width direction above the plurality of write elements in the lamination direction. At least one of the plurality of write elements is offset from the others in the lamination direction. All the plurality of read elements are located higher than an uppermost one of the plurality of write elements in the lamination direction.
摘要翻译：多通道头包括基板，沿层叠方向布置在基板上方的轨道宽度方向上的多个写入元件，以及沿层叠方向在多个写入元件上方的轨道宽度方向上布置的多个读取元件。多个写入元件中的至少一个在层叠方向上偏离其它写入元件。所有多个读取元件位于层叠方向上比多个写入元件中最上面的一个更高位置。

28. 发明授权

US07903370B2 Thin-film magnetic head with coil-insulating layer that thermal expansion coefficient and young'S modulus are specified 有权
标题翻译：具有线圈绝缘层的薄膜磁头指定了热膨胀系数和年轻模量
公开(公告)号：US07903370B2
公开(公告)日：2011-03-08
申请号：US11757114
申请日：2007-06-01
申请人： Katsuki Kurihara , Hiraku Hirabayashi , Norikazu Ota
发明人： Katsuki Kurihara , Hiraku Hirabayashi , Norikazu Ota
IPC分类号： G11B5/17
CPC分类号： G11B5/3123 , G11B5/17 , G11B5/3106 , G11B5/3133 , G11B5/3136 , G11B5/6064 , G11B2005/0002
摘要： A thin-film magnetic head which suppresses the TPTP phenomenon due to the environment temperature is provided. The thin-film magnetic head includes, an electromagnetic coil element having a coil layer and coil-insulating layer, and an overcoat layer. A width of the coil-insulating layer in a track-width direction is larger than a width that is needed to insulate the whole coil layer, and is at least 46 μm, and a length of the coil-insulating layer in a direction perpendicular to the track-width direction is larger than a length that is needed to insulate the whole coil layer, and is at least 75 μm. In addition, a heat expansion coefficient of the coil-insulating layer is larger than or equal to 30×10−6/K, and a Young's modulus of the coil-insulating layer is larger than or equal to 1 GPa and smaller than or equal to 4 GPa.
摘要翻译：提供了抑制由于环境温度引起的TPTP现象的薄膜磁头。薄膜磁头包括具有线圈层和线圈绝缘层的电磁线圈元件和外涂层。线圈绝缘层在轨道宽度方向上的宽度大于使整个线圈层绝缘所需的宽度，并且至少为46μm，线圈绝缘层的垂直方向的长度轨道宽度方向大于绝缘整个线圈层所需的长度，并且至少为75μm。此外，线圈绝缘层的热膨胀系数大于或等于30×10-6 / K，线圈绝缘层的杨氏模量大于或等于1GPa且小于或等于至4 GPa。

29. 发明申请

US20110025322A1 MAGNETO-RESISTANCE EFFECT ELEMENT AND SENSOR 有权
标题翻译：磁阻效应元件和传感器
公开(公告)号：US20110025322A1
公开(公告)日：2011-02-03
申请号：US12845992
申请日：2010-07-29
申请人： Hiroshi YAMAZAKI , Hiraku Hirabayashi , Naoki Ohta
发明人： Hiroshi YAMAZAKI , Hiraku Hirabayashi , Naoki Ohta
IPC分类号： G01R33/09
CPC分类号： G01R33/091 , G01R33/0005
摘要： A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections.
摘要翻译：用于感测外部施加的磁性的变化的传感器的磁电阻效应元件包括具有固定的磁化方向的固定层，具有响应于外部磁场而变化的磁化方向的自由层，以及设置在钉扎层和自由层。钉扎层具有在固定磁化方向上长的并且在与固定磁化方向正交的方向上短的平面形状。此外，被钉扎层优选具有其中被钉扎层被分成多个部分的平面形状。

30. 发明授权

US07675716B2 Composite thin-film magnetic head, magnetic head assembly and magnetic disk drive apparatus 有权
标题翻译：复合薄膜磁头，磁头组件和磁盘驱动装置
公开(公告)号：US07675716B2
公开(公告)日：2010-03-09
申请号：US11393775
申请日：2006-03-31
申请人： Takeo Kagami , Hiroshi Kiyono , Hiraku Hirabayashi , Eiichi Omata , Seiji Yari , Takamitsu Sakamoto
发明人： Takeo Kagami , Hiroshi Kiyono , Hiraku Hirabayashi , Eiichi Omata , Seiji Yari , Takamitsu Sakamoto
IPC分类号： G11B5/39 , G11B5/31
CPC分类号： G11B5/3116 , G11B5/11 , G11B5/3133 , G11B5/3146 , G11B5/3967 , G11B5/6064 , G11B2005/0005
摘要： A composite thin-film magnetic head includes a substrate, an under layer formed on the substrate, an MR read head element formed on the under layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a direction perpendicular to a surface of the MR layer through the upper shield layer and the lower shield layer, an inter-shield insulation layer laminated on the MR read head element, an inductive write head element formed on the inter-shield insulation layer and provided with a first magnetic pole layer, a nonmagnetic layer, a second magnetic pole layer whose end portion is opposed to an end portion of the first magnetic pole layer through the nonmagnetic layer, and a write coil, and an additional shield layer formed between the upper shield layer and the first magnetic pole layer.
摘要翻译：复合薄膜磁头包括基板，形成在基板上的下层，形成在下层上并设置有下屏蔽层，上屏蔽层和MR层的MR读头元件，其中感测电流通过上屏蔽层和下屏蔽层在垂直于MR层的表面的方向上流动，层叠在MR读头元件上的屏蔽间绝缘层，形成在屏蔽间绝缘层上的感应写头元件并且具有第一磁极层，非磁性层，其端部通过非磁性层与第一磁极层的端部相对的第二磁极层和写入线圈，以及形成在第一磁极层之间的附加屏蔽层上屏蔽层和第一磁极层。

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