公开(公告)号：US4755891A

公开(公告)日：1988-07-05

申请号：US898212

申请日：1986-08-20

申请人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

发明人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

IPC分类号： G11B5/09 ,  G11B5/02 ,  G11B20/10 ,  G11B5/23

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B5/02

摘要： In a waveform processing circuit comprising a delay line for delaying a signal outputted from a ring type magnetic head reproducing a perpendicular magnetization recording, an attenuator for attenuating the signal delivered out of the ring type magnetic head, and a differential amplifier for receiving outputs from the delay line and the attenuator, wherein a waveform of the signal is processed to discriminate a position of magnetization transition based on the waveform of the signal; the delay time .tau. of the delay line is selected to satisfyv.multidot..tau..ltoreq.gwhere, v is a relative speed between the recording medium and the magnetic head and g indicates the gap length of the magnetic head.

摘要翻译： 在波形处理电路中，包括用于延迟从再现垂直磁化记录的环形磁头输出的信号的延迟线，用于衰减从环型磁头输出的信号的衰减器，以及差分放大器，用于接收来自 延迟线和衰减器，其中处理信号的波形以基于信号的波形来识别磁化转变的位置; 选择延迟线的延迟时间τ以满足vx tau，其中v是记录介质和磁头之间的相对速度，g表示磁头的间隙长度。

公开(公告)号：US4777553A

公开(公告)日：1988-10-11

申请号：US919424

申请日：1986-10-16

申请人： Hajime Aoi ,  Fumio Kugiya ,  Takashi Tamura

发明人： Hajime Aoi ,  Fumio Kugiya ,  Takashi Tamura

IPC分类号： G11B5/02 ,  G11B5/127 ,  G11B5/31 ,  G11B5/39 ,  G11B11/10 ,  G11B11/105 ,  G11B5/12 ,  G11B5/22

CPC分类号： G11B5/1278 ,  G11B11/10547 ,  G11B5/39 ,  G11B5/3183

摘要： A magnetic head for reading-out information magnetically recorded on a magnetic recording medium in a waveform varying between two different phases. The magnetic head includes at least one block of high magnetic permeability disposed adjacent to and directly facing a surface of the magnetic recording medium to be read-out so as to provide a magnetic path for passing therethrough magnetic flux emanating from the magnetic record on the magnetic recording medium. A magnetic material member is disposed adjacent to the at least one block so as to cause the magnetic flux emanating from the magnetic record on the magnetic recording medium to pass therethrough and is responsive to transition of the magnetic flux corresponding to variation from one phase to another phase in the waveform representing the recorded information so as to provide a predetermined physical effect. Further, a detecting arrangement is provided for the detecting the predetermined physical effect.

摘要翻译： 一种磁头，用于以两个不同相位之间变化的波形读出磁记录在磁记录介质上的信息。 磁头包括至少一个高磁导率块，其邻近并直接面向待读出的磁记录介质的表面，以便提供一个磁路，用于通过从磁记录发出的磁通量磁化 记录介质。 磁性材料构件被布置成与至少一个块相邻，以便使从磁记录介质上的磁记录发出的磁通量通过其中，并响应于对应于从一个相变到另一相的磁通的转变 表示记录信息的波形相位，以便提供预定的物理效果。 此外，提供了用于检测预定物理效果的检测装置。

公开(公告)号：US5568331A

公开(公告)日：1996-10-22

申请号：US603320

申请日：1990-10-25

申请人： Kyo Akagi ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Takeshi Nakao ,  Takayuki Munemoto ,  Hirotsugu Fukuoka ,  Makoto Aihara ,  Tokuho Takagaki ,  Hajime Aoi ,  Yosuke Seo

发明人： Kyo Akagi ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Takeshi Nakao ,  Takayuki Munemoto ,  Hirotsugu Fukuoka ,  Makoto Aihara ,  Tokuho Takagaki ,  Hajime Aoi ,  Yosuke Seo

IPC分类号： G11B5/584 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/584

摘要： A method and device of head positioning in an information recording/reading device in which a magnetic recording medium with data tracks for recording information thereon is provided and a magnetic head is positioned on the data track to record/read out the information, wherein a data signal is recorded in the data recording layer of said recording medium, a servo signal is recorded in the servo signal recording layer located below said data signal recording layer, said data signal is read out using a data magnetic head whereas said servo signal is read out using a servo magnetic head, and the frequency of said servo signal is within the range of the gap-null frequency of said data magnetic head whereas the frequency of said data signal is within the range of the gap-null frequency of said servo magnetic head, and said magnetic head is positioned on the data track on the basis of said servo signal. A method and device of head positioning in an information recording/reading device in which a magnetic recording medium with data tracks for recording information thereon is provided and a magnetic head is positioned on the data track to record/read out the information, wherein the data tracks are discrete tracks in which adjacent data tracks are separated by a groove located therebetween, a data signal is recorded on the data track of said recording medium, a servo signal is recorded on the servo tracks of grooves between said adjacent data tracks, and said magnetic head is positioned on the data track on the basis of said servo signal.

摘要翻译： 一种在信息记录/读取装置中头部定位的方法和装置，其中提供具有用于记录信息的数据轨道的磁记录介质，并且磁头位于数据轨道上以记录/读出信息，其中数据 信号被记录在所述记录介质的数据记录层中，伺服信号被记录在位于所述数据信号记录层下方的伺服信号记录层中，所述数据信号使用数据磁头读出，而所述伺服信号被读出 使用伺服磁头，并且所述伺服信号的频率在所述数据磁头的间隙零频率的范围内，而所述数据信号的频率在所述伺服磁头的间隙空位频率的范围内 并且所述磁头基于所述伺服信号位于数据轨道上。 一种在信息记录/读取装置中头部定位的方法和装置，其中提供具有用于记录信息的数据轨道的磁记录介质，并且磁头位于数据轨道上以记录/读出信息，其中数据 轨道是离散轨道，其中相邻数据轨道由位于其间的凹槽分开，数据信号被记录在所述记录介质的数据轨道上，伺服信号被记录在所述相邻数据轨道之间的凹槽的伺服轨道上，并且所述 磁头基于所述伺服信号位于数据轨道上。

公开(公告)号：US07227818B1

公开(公告)日：2007-06-05

申请号：US08436490

申请日：1995-05-08

申请人： Tsuyoshi Toda ,  Takeshi Maeda ,  Fumio Kugiya ,  Hiroshi Ide ,  Hiroyuki Tsuchinaga ,  Fumiyoshi Kirino ,  Toshimitsu Kaku ,  Kazuo Shigematsu

发明人： Tsuyoshi Toda ,  Takeshi Maeda ,  Fumio Kugiya ,  Hiroshi Ide ,  Hiroyuki Tsuchinaga ,  Fumiyoshi Kirino ,  Toshimitsu Kaku ,  Kazuo Shigematsu

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0062 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/094 ,  G11B7/1267 ,  G11B11/1053 ,  G11B11/10576 ,  G11B11/10595

摘要： A method of recording data into a recording medium by forming a recording region which is physically different from the nonrecorded portions is disclosed. The optical data recording/reproducing method includes a first trial writing operation in which trial writing data are recorded into the recording medium while changing the recording power conditions, the recorded trial writing data are reproduced, and the reproduced trial writing data are evaluated to set an optimum recording power. The method also includes a second trial writing operation in which trial writing data are recorded into the recording medium while changing the servo conditions, the recorded trial writing data are reproduced, and the reproduced trial writing data are evaluated to set optimum servo conditions.

摘要翻译： 公开了一种通过形成与非记录部分物理上不同的记录区域将数据记录到记录介质中的方法。 光学数据记录/再现方法包括在改变记录功率条件的同时将试写数据记录到记录介质中的第一试写操作，记录的试写数据被再现，再现的试写数据被评估 最佳记录功率 该方法还包括在改变伺服条件的同时将试写数据记录到记录介质中的第二试写操作，再现记录的试写数据，并评估再现的试写数据以设定最佳伺服条件。

公开(公告)号：US5736235A

公开(公告)日：1998-04-07

申请号：US740708

申请日：1991-08-06

申请人： Yoshibumi Matsuda ,  Masaaki Futamoto ,  Yoshinori Miyamura ,  Tokuho Takagaki ,  Hisashi Takano ,  Fumio Kugiya ,  Takeshi Nakao ,  Kyo Akagi ,  Mikio Suzuki ,  Hirotsugu Fukuoka ,  Takayuki Munemoto

发明人： Yoshibumi Matsuda ,  Masaaki Futamoto ,  Yoshinori Miyamura ,  Tokuho Takagaki ,  Hisashi Takano ,  Fumio Kugiya ,  Takeshi Nakao ,  Kyo Akagi ,  Mikio Suzuki ,  Hirotsugu Fukuoka ,  Takayuki Munemoto

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  G11B5/85 ,  G11B5/851

CPC分类号： G11B5/66 ,  G11B5/64 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/2495

摘要： A magnetic recording medium, its fabrication method, and a magnetic recording apparatus in which both saturation induction and coercive force of a magnetic film is made high as they are near a surface of the recording medium. A high density information recording can be made higher than 50 kFCI in linear recording density even for spacing around 0.2 .mu.m.

摘要翻译： 一种磁记录介质，其制造方法和磁记录装置，其中磁记录介质的表面附近磁饱和感应和磁性膜的矫顽力均较高。 即使对于0.2μm左右的间隔，高密度信息记录也可以使线性记录密度高于50kFCI。

公开(公告)号：US07054120B2

公开(公告)日：2006-05-30

申请号：US10700500

申请日：2003-11-05

申请人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

发明人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

IPC分类号： G11B5/39

CPC分类号： G11B5/398 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/0002 ,  G11B2005/0016 ,  G11B2005/3996 ,  H01F10/324 ,  H01F10/3254 ,  H01F10/3268 ,  H01L43/08 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49155

摘要： The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

摘要翻译： 磁阻效应元件是至少具有磁性层和抵抗磁性层的绝缘材料，半导体或反铁磁材料的中间层的多层结构，并且磁阻效应元件至少在相对的磁性层上形成端子， 使得电流在中间层中流动。 构成磁阻效应元件的所有磁性层的膜表面基本上与磁记录介质的记录表面成直角相对。 因此，能够极大地降低与磁记录介质的记录面对置的磁性层的面积，因此能够通过电流检测来自高密度记录磁记录介质的非常窄的区域的磁场 穿透特性，穿过中间层。

公开(公告)号：US06278593B1

公开(公告)日：2001-08-21

申请号：US09468309

申请日：1999-12-21

申请人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

发明人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

IPC分类号： G11B539

CPC分类号： G11B5/398 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/0002 ,  G11B2005/0016 ,  G11B2005/3996 ,  H01F10/324 ,  H01F10/3254 ,  H01F10/3268 ,  H01L43/08 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49155

摘要： The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semicondutor or an antiferromagnetic material against the magnetic layers, and the magneto-resistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

摘要翻译： 磁阻效应元件是至少具有磁性层和抵抗磁性层的绝缘材料，半导体或反铁磁材料的中间层的多层结构，并且磁阻效应元件具有至少形成在相对的磁体上的端子 层，使得电流在中间层中流动。 构成磁阻效应元件的所有磁性层的膜表面基本上与磁记录介质的记录表面成直角相对。 因此，能够极大地降低与磁记录介质的记录面对置的磁性层的面积，因此能够通过电流检测来自高密度记录磁记录介质的非常窄的区域的磁场 穿透特性，穿过中间层。

公开(公告)号：US5766718A

公开(公告)日：1998-06-16

申请号：US196811

申请日：1994-01-31

申请人： Yoshibumi Matsuda ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Takeshi Nakano ,  Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yasuhide Ouchi

发明人： Yoshibumi Matsuda ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Takeshi Nakano ,  Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yasuhide Ouchi

IPC分类号： G11B5/09 ,  G11B5/55 ,  G11B5/596 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/738 ,  G11B5/74 ,  G11B5/82 ,  G11B5/855 ,  G11B5/66

CPC分类号： B82Y10/00 ,  G11B5/09 ,  G11B5/5526 ,  G11B5/74 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B5/59633 ,  Y10S428/90

摘要： It is disclosed that a longitudinal magnetic recording medium and apparatus has recording sections having longitudinal magnetic films magnetically isolated in a recording direction. The magnetically isolated recording sections can record a single bit each so that the longitudinal magnetic recording medium can remove the irregular domain boundary of its own caused on boundaries of magnetization reversals in the recording direction. This can improve the signal-to-media noise ratio to a great extent in writing and reading.

摘要翻译： 公开了一种纵向磁记录介质和装置，具有在记录方向上磁隔离的纵向磁性膜的记录部。 磁隔离的记录部分可以记录单个位，使得纵向磁记录介质可以消除在记录方向上的磁化反转边界引起的自身的不规则区域边界。 这可以在很大程度上提高写和读的信噪比。

公开(公告)号：US5325244A

公开(公告)日：1994-06-28

申请号：US843265

申请日：1992-02-28

申请人： Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yoshibumi Matsuda ,  Takeshi Nakao ,  Yoshinori Miyamura ,  Fumio Kugiya ,  Masaaki Futamoto ,  Hideki Sawaguchi ,  Nobuyuki Inaba ,  Takayuki Munemoto ,  Kenji Mori ,  Hirotsugu Fukuoka ,  Tokuho Takagaki

发明人： Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yoshibumi Matsuda ,  Takeshi Nakao ,  Yoshinori Miyamura ,  Fumio Kugiya ,  Masaaki Futamoto ,  Hideki Sawaguchi ,  Nobuyuki Inaba ,  Takayuki Munemoto ,  Kenji Mori ,  Hirotsugu Fukuoka ,  Tokuho Takagaki

IPC分类号： G11B5/02 ,  G11B5/00 ,  G11B5/39 ,  G11B5/55 ,  G11B5/596 ,  G11B5/60 ,  G11B5/65 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B13/04 ,  G11B21/10 ,  G11B5/58

CPC分类号： G11B5/3967 ,  G11B5/00 ,  G11B5/5552 ,  G11B5/59677 ,  G11B5/6005 ,  G11B5/74

摘要： A magnetic recording data storage system includes a magnetic recording medium having pits formed therein, the pits defining recording tracks on the magnetic recording medium and being arranged in a staggered manner relative to respective center lines of the recording tracks, a magnetic head including an inductive element for recording data on the recording tracks and a magnetoresistive element for reproducing data from the recording tracks, one of (1) a unit for magnetically producing a signal from the pits, and (2) an optical unit for optically producing a signal from the pits, the optical unit including a laser for illuminating the pits, servo means for positioning the head on the recording tracks based on the signal produced from the pits, the servo means including a dual-stage actuator including a rough movement portion and a fine movement portion.

摘要翻译： 磁记录数据存储系统包括其中形成有凹坑的磁记录介质，凹坑在磁记录介质上定义记录轨道并相对于记录轨道的相应中心线以交错方式布置，磁头包括电感元件 用于在记录磁道上记录数据和用于从记录磁道再现数据的磁阻元件，（1）用于从凹坑中产生信号的单元，以及（2）用于光学地产生来自凹坑的信号的光学单元 所述光学单元包括用于照亮所述凹坑的激光器，用于基于由所述凹坑产生的信号将所述磁头定位在所述记录磁道上的伺服装置，所述伺服装置包括双级致动器，所述双级致动器包括粗略运动部分和精细运动部分 。

公开(公告)号：US5093822A

公开(公告)日：1992-03-03

申请号：US532686

申请日：1990-06-04

申请人： Fumio Kugiya ,  Mikio Suzuki ,  Kyo Akagi ,  Takeshi Nakao ,  Masaaki Futamoto ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda

发明人： Fumio Kugiya ,  Mikio Suzuki ,  Kyo Akagi ,  Takeshi Nakao ,  Masaaki Futamoto ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B11/10504 ,  G11B11/10515 ,  G11B11/10519 ,  G11B11/10536

摘要： A high-density magnetic recording and optical reproducing apparatus for magneto-optically reproducing information magnetically recorded on information tracks on a recording medium, the apparatus comprising two laser beam sources emitting laser beams having different wavelengths respectively, an optical system for directing the laser beams from the two laser beam sources toward and onto the recording medium so as to irradiate the recording medium with laser beam spots partly overlapping each other, two photo detectors detecting the laser beams reflected from the surface of the recording medium, and a differential amplifier detecting the difference between the output signals of the two photo detectors thereby generating the differential signal as a reproduced output.

摘要翻译： 一种高密度磁记录和光学再现装置，用于磁记录在记录介质上的信息磁道上磁信息记录的信息，该装置包括分别发射具有不同波长的激光束的两个激光束源，用于将激光束从 两个激光束源朝向和记录在记录介质上，以便将具有部分重叠的激光束照射到记录介质上，两个光电检测器检测从记录介质表面反射的激光束，以及差分放大器检测差分 在两个光电检测器的输出信号之间产生差分信号作为再现输出。