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71. 发明授权

US06741431B2 Magnetic head and magnetic recording/reproduction device 失效
标题翻译：轭型磁头和磁记录/再现装置
公开(公告)号：US06741431B2
公开(公告)日：2004-05-25
申请号：US10424822
申请日：2003-04-29
申请人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1278 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B2005/3996
摘要： The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.
摘要翻译：本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化不敏感。由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以匹配该尺寸，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它可能抑制巴克豪森噪音的产生。通过诱导磁轭内的迷宫结构也可以获得类似的效果。

72. 发明申请

US20040027883A1 Magnetic head, method for producing same, and magnetic recording and/or reproducing system 有权
标题翻译：磁头，其制造方法以及磁记录和/或再现系统
公开(公告)号：US20040027883A1
公开(公告)日：2004-02-12
申请号：US10635508
申请日：2003-08-07
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hiroaki Yoda , Yuichi Osawa , Tomomi Funayama
IPC分类号： G11C007/00
CPC分类号： G11B5/3925 , G11B5/00 , G11B5/127 , G11B5/1278 , G11B5/3116 , G11B2005/0002 , G11B2005/0021 , Y10T29/49039 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49055 , Y10T29/49067
摘要： There is provided a magnetic head capable of efficiently carrying out a recording or reproducing operation even in the case of a shorter magnetic path length and a shorter wavelength signal. The magnetic head comprises: a pair of magnetic bodies including respective first and second medium facing surfaces, respective first and second rear surfaces opposite to the medium facing surfaces, and respective inner side surfaces, the inner side surfaces facing each other; and a magnetic gap disposed between the inner side surfaces and including third medium facing surface coplanar with the first and the second medium facing surfaces and third rear surface coplanar with the first and second rear surfaces; one of the inner side surfaces satisfying relationships of xnullG1/2 with respect to 0nullynullTH, and 0.1nulltannull2(xnullG1/2)nullnullTHnullynull5nulltan(2(xnullG1/2))nullTH with respect to THnully where x represents X-coordinate of the one of the inner side surfaces and y represents Y-coordinate of the one of the inner side surfaces, the X-axis extends from a center of the third medium facing surface toward a center of the first or the second medium facing surface, the Y-axis extends from the center of the third medium facing surface toward the third rear surface, the Y-axis is substantially perpendicular to the X-axis, and G1 and TH respectively represent constants.
摘要翻译：即使在较短的磁路长度和较短的波长信号的情况下，也能够有效地执行记录或重放操作的磁头。磁头包括：一对磁体，包括相应的第一和第二介质面对表面，与介质相对表面相对的相应的第一和第二后表面，以及相应的内侧表面，内侧表面彼此相对; 以及设置在所述内侧表面之间并且包括与所述第一和第二介质相对表面共面的第三介质面对表面和与所述第一和第二后表面共面的第三后表面的磁隙; 一个内侧表面满足x = G1 / 2相对于0 <= y <= TH的关系，0.1tan {2（x-G1 / 2）} + TH <= y <= 5.tan 2（x-G1 / 2））+ TH相对于TH <= y，其中x表示内侧表面之一的X坐标，y表示内侧表面之一的Y坐标，所述Y轴从所述第三介质对向表面的中心朝向所述第一或第二介质面对表面的中心延伸，所述Y轴从所述第三介质相对表面的中心朝向所述第三后表面延伸，所述Y轴基本上垂直于X轴，G1和TH分别表示常数。

73. 发明授权

US06567246B1 Magnetoresistance effect element and method for producing the same, and magnetoresistance effect type head, magnetic recording apparatus, and magnetoresistance effect memory element 失效
标题翻译：磁阻效应元件及其制造方法，磁阻效应型磁头，磁记录装置和磁阻效应存储元件
公开(公告)号：US06567246B1
公开(公告)日：2003-05-20
申请号：US09516552
申请日：2000-03-01
申请人： Hiroshi Sakakima , Yasunari Sugita , Mitsuo Satomi , Yasuhiro Kawawake , Masayoshi Hiramoto , Nozomu Matsukawa
发明人： Hiroshi Sakakima , Yasunari Sugita , Mitsuo Satomi , Yasuhiro Kawawake , Masayoshi Hiramoto , Nozomu Matsukawa
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , B82Y40/00 , G11B5/00 , G11B5/012 , G11B5/3903 , G11B5/3925 , G11B2005/3996 , H01F10/3268 , H01F41/18 , H01F41/302 , H01L43/08
摘要： A magnetoresistance effect element includes a free layer, in which a magnetization direction thereof is easily rotated in response to an external magnetic field, a first non-magnetic layer, and a first pinned layer provided on a side opposite to the free layer of the first non-magnetic layer, in which a magnetization direction of the first pinned layer is not easily rotated in response to the external magnetic field. At least one of the first pinned layer and the free layer includes a first metal magnetic film contacting the first non-magnetic layer, and a first oxide magnetic film.
摘要翻译：磁阻效应元件包括自由层，其中其磁化方向响应于外部磁场容易旋转，第一非磁性层和设置在与第一非磁性层的自由层相对的一侧上的第一被钉扎层非磁性层，其中第一被钉扎层的磁化方向响应于外部磁场而不容易旋转。第一被钉扎层和自由层中的至少一个包括与第一非磁性层接触的第一金属磁性膜和第一氧化物磁性膜。

74. 发明申请

US20020118494A1 Information reproduction head apparatus and information recording/reproduction system 审中-公开
标题翻译：信息再现头装置和信息记录/再现系统
公开(公告)号：US20020118494A1
公开(公告)日：2002-08-29
申请号：US10136694
申请日：2002-04-29
申请人： NEC CORPORATION
发明人： Kazuhiko Hayashi
IPC分类号： G11B005/39
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/3113 , G11B5/3909 , G11B5/3925 , G11B5/3932
摘要： The present invention provides a yoke-type information reproduction head apparatus 100 having a magnetic sensor block 3 provided on the substrate 1 via a non-magnetic insulation layer 2. The magnetic sensor 3 includes a ferromagnetic tunnel junction element 5 which is sandwiched between an upper electrode block 6 and a lower electrode block 7 and which is connected to a magnetic domain control bias layer 8. This enables to obtain preferable S/N and bit error rate with reduced waveform noise. This invention provides a yoke-type information reproduction head having both of the characteristics of the front yoke 4-1 as a magnetic path and a lower electrode 7 as an electric path.
摘要翻译：本发明提供了一种轭型信息再现头装置100，其具有经由非磁性绝缘层2设置在基板1上的磁传感器块3.磁传感器3包括铁磁隧道结元件5，其被夹在上电极块6和下电极块7，并且连接到磁畴控制偏置层8.这使得能够以降低的波形噪声获得优选的S / N和误码率。本发明提供一种具有作为磁路的前轭铁4-1的特性和作为电通路的下电极7两者的轭型信息再生头。

75. 发明申请

US20020018324A1 Ferromagnetic tunneling magneto-resistive head 审中-公开
标题翻译：铁磁隧道磁阻头
公开(公告)号：US20020018324A1
公开(公告)日：2002-02-14
申请号：US09872665
申请日：2001-06-01
发明人： Kenji Machida , Naoto Hayashi , Kazutoshi Mutou , Toshihiro Uehara , Morio Kondo , Norio Hasegawa , Hiroyuki Ujiie , Akira Nakamura
IPC分类号： G11B005/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3909 , G11B5/3925
摘要： A ferromagnetic tunneling magneto-resistive head includes a first yoke, divided into a proximal portion and a distal portion across a gap; a second yoke formed so as to resist the first yoke, positioned opposite a magnetic recording medium, a read head gap being formed between the first and second yokes; a tunneling magneto-resistive element including at least one layer of insulating material, the insulating layer being sandwiched between at least two layers of magnetic material, the tunneling magneto-resistive element magneto-electrically converting a signal magnetic field applied via the first yoke and the second yoke by the recording medium making sliding contact with the read head gap; and a pair of electrodes positioned one at each end of the tunneling magneto-resistive element in a direction of layering of the magnetic layers. The tunneling magneto-resistive element is positioned so as to directly contact a proximal portion and a distal portion of the first yoke, with the read head gap, the proximal portion of the first yoke, the tunneling magneto-resistive element, the distal portion of the first yoke and the second yoke together forming an annular magnetic circuit.
摘要翻译：铁磁隧道磁阻头包括：第一磁轭，分成近端部分和穿过间隙的远端部分; 形成为抵抗与磁记录介质相对的第一磁轭的第二磁轭，形成在第一磁轭和第二磁轭之间的读磁头间隙; 隧道磁阻元件，其包括至少一层绝缘材料，所述绝缘层夹在至少两层磁性材料之间，所述隧道磁阻电磁元件磁电转换经由所述第一磁轭施加的信号磁场和通过记录介质与读取头间隙滑动接触的第二磁轭; 以及一对电极，其位于隧道磁阻元件的每一端一个在磁层的层叠方向上。隧道磁阻元件被定位成与第一磁轭的近端部分和远端部分直接接触，读取磁头间隙，第一磁轭的近端部分，隧道磁阻元件，隧道磁阻元件的远端部分第一磁轭和第二磁轭一起形成环形磁路。

76. 发明授权

US06307708B1 Exchange coupling film having a plurality of local magnetic regions, magnetic sensor having the exchange coupling film, and magnetic head having the same 失效
标题翻译：具有多个局部磁性区域的交换耦合膜，具有交换耦合膜的磁性传感器和具有该交换耦合膜的磁头
公开(公告)号：US06307708B1
公开(公告)日：2001-10-23
申请号：US09268322
申请日：1999-03-16
申请人： Hiroaki Yoda , Masatoshi Yoshikawa , Yuichi Ohsawa , Tomomi Funayama
发明人： Hiroaki Yoda , Masatoshi Yoshikawa , Yuichi Ohsawa , Tomomi Funayama
IPC分类号： G11B5147
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/127 , G11B5/3113 , G11B5/3156 , G11B5/3903 , G11B5/3925 , G11B5/3967 , G11B5/66 , H01F10/3218
摘要： An exchange coupling film, magnetic sensor having the exchange coupling film, and a magnetic head having the same. The exchange coupling film includes a ferromagnetic layer and an antiferromagnetic layer where a total a magnetic anisotropy is controlled to be dispersed by annealing or depositing the film in rotating magnetic fields. Small local magnetic regions of different uniaxial anisotropy are introduced in the exchange coupling film. The magnetic anisotropy dispersion of the exchange coupling film results in prohibiting large domain wall transfer of an irreversible change in magnetization direction and suppressing BHN.
摘要翻译：具有交换耦合膜的交换耦合膜，磁传感器和具有该交换耦合膜的磁头。交换耦合膜包括铁磁层和反铁磁层，其中通过在旋转磁场中退火或沉积膜来控制总磁各向异性以分散。在交换耦合膜中引入具有不同单轴各向异性的小局部磁性区域。交换耦合膜的磁各向异性分散导致阻止磁畴方向上不可逆变化的大的畴壁转移并抑制BHN。

77. 发明授权

US06266217B1 Magnetic head having an anti-ferromagnetic oxide layer between a flux guide and a magneto-resistive sensor 失效
标题翻译：在磁通导向器和磁阻传感器之间具有反铁磁氧化物层的磁头
公开(公告)号：US06266217B1
公开(公告)日：2001-07-24
申请号：US09259955
申请日：1999-03-01
申请人： Jacobus J. M. Ruigrok , Pieter J. Van Der Zaag
发明人： Jacobus J. M. Ruigrok , Pieter J. Van Der Zaag
IPC分类号： G11B539
CPC分类号： G11B5/3916 , G11B5/3925 , G11B5/3932
摘要： a magnetic head with a head face includes a multilayer structure with a flux guide, a magnetoresistive sensor, and an intermediate layer present between the flux guide and the sensor. The intermediate layer includes an anti-ferromagnetic oxide which insulates the sensor from the flux guide and also magnetically biases the sensor.
摘要翻译：具有头部面的磁头包括具有磁通引导件的多层结构，磁阻传感器以及存在于磁通引导件和传感器之间的中间层。中间层包括使传感器与磁通引导件绝缘的反铁磁氧化物，并且还使传感器发生磁偏置。

78. 发明授权

US06111782A Magnetoresistance effect device, and magnetoresistance effect type head, memory device, and amplifying device using the same 有权
标题翻译：磁电阻效应器件，磁阻效应型头，存储器件和使用其的放大器件
公开(公告)号：US06111782A
公开(公告)日：2000-08-29
申请号：US270647
申请日：1999-03-16
申请人： Hiroshi Sakakima , Yousuke Irie , Mitsuo Satomi , Yasuhiro Kawawake
发明人： Hiroshi Sakakima , Yousuke Irie , Mitsuo Satomi , Yasuhiro Kawawake
IPC分类号： G01R33/09 , G06K19/06 , G11B5/39 , G11C11/14 , G11C11/15 , G11C11/16 , G11C11/56 , H01F10/08 , H01F10/12 , H01F10/13 , H01F10/14 , H01F10/16 , H01F10/32 , H01L21/8246 , H01L27/105 , H01L27/22 , H01L43/08 , H01L43/10 , H03F7/02 , H03F15/00 , G11C11/00
CPC分类号： H03F7/02 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3903 , G11C11/15 , G11C11/16 , G11C11/5607 , H01F10/3281 , H01L27/222 , H01L43/10 , G11B2005/3996 , G11B5/3925 , G11C2211/5616
摘要： A magnetoresistance effect device of the invention includes: a substrate; and a multilayer structure formed on the substrate. The multilayer structure includes a hard magnetic film, a soft magnetic film, and a non-magnetic metal film for separating the hard magnetic film from the soft magnetic film. The magnetization curve of the hard magnetic film has a good square feature, and the direction of a magnetization easy axis of the hard magnetic film substantially agrees to the direction of a magnetic field to be detected.
摘要翻译：本发明的磁阻效应器件包括：衬底; 以及形成在基板上的多层结构。多层结构包括硬磁膜，软磁膜和用于从硬磁膜分离硬磁膜的非磁性金属膜。硬磁性膜的磁化曲线具有良好的正方形特征，硬磁性膜的磁化容易轴的方向基本上与要检测的磁场的方向一致。

79. 发明授权

US5995339A Magnetoresistive head with a front flux guide and an embedded MR element 失效
标题翻译：磁阻头具有前磁通指引和嵌入式MR元件
公开(公告)号：US5995339A
公开(公告)日：1999-11-30
申请号：US791015
申请日：1997-01-27
申请人： Takao Koshikawa , Yoshinori Ohtsuka , Yuji Uehara , Junzo Toda , Yoshifumi Mizoshita
发明人： Takao Koshikawa , Yoshinori Ohtsuka , Yuji Uehara , Junzo Toda , Yoshifumi Mizoshita
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3903 , G11B5/3919 , G11B5/3925 , G11B5/3967
摘要： A magnetoresistive head includes a magnetoresistive element set back from the front end face of the head confronting a record medium for converting changes in a signal magnetic field leaking out from the record track of the record medium into changes in resistance. The magnetoresistive element is connected to a pair of terminals and a sense region is defined between both the terminals. The magnetoresistive element is magnetically coupled to a front flux guide, one end of which is exposed in the front end face of the head, at the other end of the same. The front flux guide is virtually in the form of a rectangle elongated in the direction of the width of the record track of the record medium so as to exceed the sense region of the magnetoresistive element.
摘要翻译：磁阻头包括从面对记录介质的头的前端面设置的磁阻元件，用于将从记录介质的记录轨道泄漏的信号磁场的变化转换成电阻变化。磁阻元件连接到一对端子，并且两个端子之间限定感测区域。磁阻元件磁耦合到前磁通引导件，其前端在头部的前端面暴露在前磁通引导件的另一端处。前通量引导件实际上是在记录介质的记录轨道的宽度方向上延伸的矩形的形式，以便超过磁阻元件的感测区域。

80. 发明授权

US5995337A Combined thin film magnetic head formed over a substrate trench 失效
标题翻译：组合的薄膜磁头形成在衬底沟槽上
公开(公告)号：US5995337A
公开(公告)日：1999-11-30
申请号：US221999
申请日：1994-04-04
申请人： Tohru Kira
发明人： Tohru Kira
IPC分类号： G11B5/008 , G11B5/39
CPC分类号： G11B5/3925 , G11B5/3903 , G11B5/3967 , G11B5/397 , G11B5/00813
摘要： A combined thin film magnetic head includes a first yoke magnetic head and a second type MR head a front gap is provided at a front end of the first yoke type MR head, and a second yoke type MR head is provided behind the first yoke type MR head. Consequently, the first yoke type MR head and the second yoke type MR head can be formed on the same substrate through the same process steps, and the number of manufacturing steps can be significantly reduced.
摘要翻译：组合的薄膜磁头包括第一磁轭磁头和第二型MR磁头，前间隙设置在第一磁轭型MR磁头的前端，第二磁轭型MR磁头设置在第一磁轭型MR后面头。因此，可以通过相同的工艺步骤在同一基板上形成第一磁轭型MR磁头和第二磁轭型MR磁头，并且可以显着减少制造步骤的数量。

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