公开(公告)号：US20050007698A1

公开(公告)日：2005-01-13

申请号：US10914094

申请日：2004-08-10

申请人： Kazue Kudo ,  Yasuyuki Okada ,  Moriaki Fuyama ,  Yohji Maruyama ,  Gen Oikawa

发明人： Kazue Kudo ,  Yasuyuki Okada ,  Moriaki Fuyama ,  Yohji Maruyama ,  Gen Oikawa

IPC分类号： G11B5/31 ,  G11B5/147

CPC分类号： G11B5/313 ,  G11B5/3109 ,  G11B5/3146 ,  G11B5/3163 ,  Y10T29/49032

摘要： A thin film magnetic head and a method of manufacture thereof, wherein the head includes a lower magnetic pole, an upper magnetic pole provided so as to face the lower magnetic pole, and a magnetic gap layer provided between the lower magnetic pole and the upper magnetic pole. The upper magnetic pole is formed by a sputtered first magnetic layer which is an underlayer and a plated second magnetic layer provided on the sputtered first magnetic layer.

摘要翻译： 一种薄膜磁头及其制造方法，其中头部包括下磁极，设置成面对下磁极的上磁极，以及设置在下磁极与上磁极之间的磁隙层 极。 上磁极由溅射的第一磁性层形成，溅射的第一磁性层是设置在溅射的第一磁性层上的底层和镀覆的第二磁性层。

公开(公告)号：US06795272B2

公开(公告)日：2004-09-21

申请号：US10217451

申请日：2002-08-14

申请人： Kazue Kudo ,  Yasuyuki Okada ,  Moriaki Fuyama ,  Yohji Maruyama ,  Gen Oikawa

发明人： Kazue Kudo ,  Yasuyuki Okada ,  Moriaki Fuyama ,  Yohji Maruyama ,  Gen Oikawa

IPC分类号： G11B547

CPC分类号： G11B5/313 ,  G11B5/3109 ,  G11B5/3146 ,  G11B5/3163 ,  Y10T29/49032

摘要： A thin film magnetic head includes a lower magnetic pole, an upper magnetic pole provided so as to face the lower magnetic pole, and a magnetic gap layer provided between the lower magnetic pole and the upper magnetic pole. The upper magnetic pole constitutes a first magnetic layer formed on a side facing the magnetic gap layer by means of sputtering and a second magnetic layer formed on the first magnetic layer by means of plating, in which the saturation magnetic flux density of the first magnetic layer is set higher than that of the second magnetic layer. The thin film magnetic head composed as above is capable of generating a stronger magnetic field owing to its stably-formed magnetic core, thereby recording on a high-coercivity medium and high-density recording are made possible.

摘要翻译： 薄膜磁头包括下磁极，设置成面对下磁极的上磁极和设置在下磁极和上磁极之间的磁隙层。 上磁极构成通过溅射形成在面对磁隙层的一侧的第一磁性层，以及通过电镀形成在第一磁性层上的第二磁性层，其中第一磁性层的饱和磁通密度 被设定为高于第二磁性层的高度。 如上构成的薄膜磁头由于其稳定形成的磁芯而能够产生更强的磁场，从而在高矫顽力介质上进行记录和高密度记录。

公开(公告)号：US06794063B2

公开(公告)日：2004-09-21

申请号：US10153618

申请日：2002-05-24

申请人： Yasuyuki Okada ,  Kazue Kudo ,  Hiroyuki Hoshiya

发明人： Yasuyuki Okada ,  Kazue Kudo ,  Hiroyuki Hoshiya

IPC分类号： G11B5147

CPC分类号： G11B5/3109 ,  G11B5/3163 ,  Y10S428/90 ,  Y10T428/1143 ,  Y10T428/115

摘要： The present invention provides a thin film magnetic head having sufficient recording performance on a recording medium imparted with a large coercive force. According to the present invention, a plated magnetic thin film can be obtained in which a crystal grain size is modulated in a film thickness direction and a coercive force is reduced. Further, according to the present invention, even for a composition area indicating a high saturation magnetic flux density in which, conventionally, soft magnetic properties could not be obtained, magnetic film having an excellent soft magnetic property can be manufactured.

摘要翻译： 本发明提供一种在赋予矫顽力的记录介质上具有足够记录性能的薄膜磁头。 根据本发明，可以获得在膜厚度方向调制晶粒尺寸并减小矫顽力的镀覆磁性薄膜。 此外，根据本发明，即使在表示高饱和磁通密度的组成区域中，通常也不能获得软磁特性，所以可以制造出具有优良的软磁特性的磁性膜。

公开(公告)号：US4279004A

公开(公告)日：1981-07-14

申请号：US35530

申请日：1979-05-03

申请人： Yoshiaki Yamashita ,  Hiroyuki Kambara ,  Hiroaki Kambayashi ,  Yasuyuki Okada

发明人： Yoshiaki Yamashita ,  Hiroyuki Kambara ,  Hiroaki Kambayashi ,  Yasuyuki Okada

IPC分类号： G11B15/087 ,  G11B5/55 ,  G11B17/00 ,  G11B20/10 ,  G11B27/10 ,  G11B5/09

CPC分类号： G11B5/5547 ,  G11B17/005 ,  G11B27/105

摘要： Disclosed is a method for controlling a rotary memory device for recording information on a recording medium in the form of a track, in which method the respective areas, such as a count section, a key section and a data section, which constitute a record format in the form of a record, are stored in the respective sectors each having a fixed length.

摘要翻译： 公开了一种用于控制以轨道形式在记录介质上记录信息的旋转存储装置的方法，其中构成记录格式的诸如计数部分，关键部分和数据部分的各个区域 以记录的形式存储在各自具有固定长度的扇区中。

公开(公告)号：US08054067B2

公开(公告)日：2011-11-08

申请号：US12359684

申请日：2009-01-26

申请人： Yasuyuki Okada ,  Chiharu Mitsumata

发明人： Yasuyuki Okada ,  Chiharu Mitsumata

IPC分类号： G01B7/30

CPC分类号： G01D5/145 ,  B82Y25/00 ,  G01R33/093

摘要： A magnetic sensor comprising a bridge circuit in which four magnetoresistive devices are connected, the magnetoresistive device comprising a spin-valve, giant-magnetoresistive film comprising a pinned layer having unidirectional magnetic anisotropy, a free layer whose magnetization direction is rotated in alignment with an external magnetic field direction, and an intermediate layer sandwiched by the pinned layer and the free layer, and at least one of the magnetoresistive devices meeting the condition of 36°≦θ

摘要翻译： 一种磁传感器，包括其中连接有四个磁阻器件的桥接电路，所述磁阻器件包括自旋阀，巨磁阻膜，其包括具有单向磁各向异性的钉扎层，其磁化方向与外部的对准旋转的自由层 磁场方向和由被钉扎层和自由层夹持的中间层，并且至少一个满足36°＆lt; 45°的条件的磁阻器件;其中＆amp; 是其纵向方向与钉扎层的磁化方向之间的锐角。

公开(公告)号：US07859797B2

公开(公告)日：2010-12-28

申请号：US11655820

申请日：2007-01-18

申请人： Katsumi Hoshino ,  Hiroyuki Hoshiya ,  Yasuyuki Okada

发明人： Katsumi Hoshino ,  Hiroyuki Hoshiya ,  Yasuyuki Okada

IPC分类号： G11B5/39

CPC分类号： G11B5/3912

摘要： Embodiments in accordance with the present invention provide a Current Perpendicular to the Plane—Giant Magnetoresistive (CPP-GMR) head exhibiting a high magnetoresistance (MR) ratio with a low area-resistance product. A lower shield is made up of a first shield layer/a crystalline reset layer/a second shield layer, and an amorphous material is used in at least a part of the crystalline reset layer, thereby controlling crystallinity of the second lower shield/the CPP-GMR head.

摘要翻译： 根据本发明的实施例提供了与低面积电阻产品呈现高磁阻（MR）比的平面大磁阻（CPP-GMR）磁头垂直的电流。 下屏蔽由第一屏蔽层/晶体复位层/第二屏蔽层构成，并且非晶材料用于晶体复位层的至少一部分，由此控制第二下屏蔽/ CPP的结晶度 -GMR头。

公开(公告)号：US07667520B2

公开(公告)日：2010-02-23

申请号：US11896528

申请日：2007-09-04

申请人： Hiroshi Inoue ,  Yorimasa Funahashi ,  Satoshi Nakashima ,  Yasuyuki Okada

发明人： Hiroshi Inoue ,  Yorimasa Funahashi ,  Satoshi Nakashima ,  Yasuyuki Okada

IPC分类号： H03L5/00

CPC分类号： H03K5/1565 ,  H03K3/35613 ,  H03K19/018528

摘要： The level shift device of the present invention comprises: a level shift circuit which converts a voltage level of a single input signal; and a duty correcting circuit which offsets a difference in the duty of an output signal of the level shift circuit with respect to the duty of the input signal.

摘要翻译： 本发明的电平移位装置包括：电平移位电路，其转换单个输入信号的电压电平; 以及占空比校正电路，其相对于输入信号的占空比来偏移电平移位电路的输出信号的占空比差。

公开(公告)号：US07491986B2

公开(公告)日：2009-02-17

申请号：US10740684

申请日：2003-12-22

申请人： Takaaki Kumagae ,  Yasuyuki Okada ,  Masumi Nobata

发明人： Takaaki Kumagae ,  Yasuyuki Okada ,  Masumi Nobata

IPC分类号： H01L27/10

CPC分类号： H01L22/32 ,  H01L23/5286 ,  H01L24/06 ,  H01L2924/14 ,  H01L2924/3011 ,  H01L2924/00

摘要： A different electric power supply electric power source cell is proposed which includes paths by which electric power source voltages, the electric potentials of which are different from each other, are respectively taken in from the area pad and the probing pad and by which the voltages are supplied to the blocks requiring these electric power source voltages.

摘要翻译： 提出了一种不同的电力供电电池单元，其包括电源电压彼此不同的路径，分别从区域焊盘和探测板取出电压，电压为 提供给需要这些电源电压的块。

公开(公告)号：US07400137B1

公开(公告)日：2008-07-15

申请号：US11834062

申请日：2007-08-06

申请人： Kenichi Meguro ,  Hiroyuki Hoshiya ,  Kazuhiro Nakamoto ,  Yasuyuki Okada ,  Yasunori Abe

发明人： Kenichi Meguro ,  Hiroyuki Hoshiya ,  Kazuhiro Nakamoto ,  Yasuyuki Okada ,  Yasunori Abe

IPC分类号： G01R33/09 ,  H01L43/08 ,  G01B7/14 ,  G01B7/30

CPC分类号： G01R33/093 ,  B82Y25/00

摘要： The present invention provides a magnetic sensor suitable for high resolution and having high reliability by achieving stable output even at the occurrence of variations in a gap between a magnetic medium and the magnetic sensor, and a magnetic encoder using the magnetic sensor. The present invention uses a magnetoresistive element having magnetoresistive properties that satisfy the inequation, H10−50

摘要翻译： 本发明提供一种适用于高分辨率的磁传感器，即使在磁介质和磁传感器之间的间隙发生变化的情况下也能实现稳定的输出，并具有高的可靠性，以及使用该磁传感器的磁编码器。 本发明使用具有满足H10-50

公开(公告)号：US20070217066A1

公开(公告)日：2007-09-20

申请号：US11802297

申请日：2007-05-22

申请人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

发明人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

IPC分类号： G11B5/127

CPC分类号： G11B5/3906 ,  G11B5/1278

摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field exceeding 10 kOe (oersted), while also modified to suppress remanent magnetic fields occurring immediately after writing operation. In a perpendicular magnetic head comprising a main pole, a return path for supplying a magnetic flux to that main pole, and an conductive coil for excitation of the main pole and return path, the main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer, the low saturation flux density layer has a thickness within 0.5 to 5 nanometers, the high saturation flux density layer has a thickness from 10 to 50 nanometers for suppressing remanent magnetization and preventing erasing after writing by utilizing a closed magnetic domain structure in the pole.

摘要翻译： 具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生超过10kOe（奥斯特）的高磁记录场，同时还被修改以抑制写入后立即发生的残留磁场 操作。 在包括主极，用于向该主极提供磁通的返回路径和用于激励主极返回路径的导电线圈的垂直磁头中，主极的极宽为200纳米以下， 以及由高饱和磁通密度层和低饱和磁通密度层组成的磁性层，低饱和磁通密度层的厚度在0.5〜5纳米之间，高饱和磁通密度层的厚度为10〜50纳米， 通过利用极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。