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1. 发明授权

US06365948B1 Magnetic tunneling junction device 失效
标题翻译：磁隧道连接装置
公开(公告)号：US06365948B1
公开(公告)日：2002-04-02
申请号：US08824716
申请日：1997-03-26
申请人： Seiji Kumagai , Toshihiko Yaoi , Yoshito Ikeda
发明人： Seiji Kumagai , Toshihiko Yaoi , Yoshito Ikeda
IPC分类号： H01L2982
CPC分类号： H01L43/08
摘要： A magnetic tunneling effect device capable of displaying a so-called magnetic tunneling effect in stability, more specifically, a magnetic tunneling junction device in which a first magnetic metal layer and a second magnetic metal layer are connected together by ferromagnetic tunnel junction via an insulating layer and in which the conductance of the tunnel current is changed by the relative angle of magnetization of these magnetic metal layers. The ferromagnetic tunnel junction has a junction area of not larger than 1 10−9 m2. For reliably controlling the junction area of the ferromagnetic tunnel junction, the insulating layer is formed by a first insulating layer for ferromagnetic tunnel junction and a second insulating layer formed on the first insulating layer for controlling the junction area of the ferromagnetic tunnel junction.
摘要翻译：一种能够稳定地显示所谓的磁隧道效应的磁隧道效应装置，更具体地说，是一种磁性隧道接合装置，其中第一磁性金属层和第二磁性金属层通过铁磁隧道结通过绝缘层连接在一起并且其中隧道电流的电导被这些磁性金属层的相对磁化角改变。铁磁隧道结的接合面积不大于1 10-9平方米。为了可靠地控制铁磁隧道结的接合面，绝缘层由用于铁磁隧道结的第一绝缘层和形成在第一绝缘层上的第二绝缘层形成，用于控制铁磁隧道结的结面积。

2. 发明授权

US5867887A Manufacturing method for magnetic head 失效
标题翻译：磁头制造方法
公开(公告)号：US5867887A
公开(公告)日：1999-02-09
申请号：US745304
申请日：1996-11-12
申请人： Seiji Kumagai , Masatoshi Hayakawa , Yoshito Ikeda , Junichi Honda
发明人： Seiji Kumagai , Masatoshi Hayakawa , Yoshito Ikeda , Junichi Honda
IPC分类号： G11B5/127 , G11B5/133 , G11B5/187 , G11B5/193 , G11B5/23 , G11B5/42
CPC分类号： G11B5/1335 , G11B5/1878 , G11B5/193 , Y10T29/49034 , Y10T29/49057
摘要： A method of manufacturing a magnetic head by bonding a pair of magnetic cores to each other, wherein a residual stress in the magnetic cores upon bonding them together is controlled so that a permeability of the magnetic cores in the vicinity of a magnetic recording medium sliding surface of the magnetic cores may become maximum. Accordingly, the residual stress in the magnetic cores is controlled so that the permeability of the magnetic cores may surely become maximum after forming the magnetic head, thereby ensuring a superior reproduction efficiency of the magnetic head.
摘要翻译：通过将一对磁芯彼此结合来制造磁头的方法，其中磁芯在将它们结合在一起时的残余应力被控制，使得磁芯在磁记录介质滑动表面附近的磁导率的磁芯可能会变得最大。因此，控制磁芯中的残余应力，使得在形成磁头之后磁芯的磁导率可以确定地变得最大，从而确保磁头的优异的再现效率。

3. 发明授权

US06312840B1 Magnetic tunneling element and manufacturing method therefor 失效
标题翻译：磁性隧道元件及其制造方法
公开(公告)号：US06312840B1
公开(公告)日：2001-11-06
申请号：US09397069
申请日：1999-09-16
申请人： Seiji Kumagai , Eiji Nakashio , Junichi Sugawara , Yoshito Ikeda
发明人： Seiji Kumagai , Eiji Nakashio , Junichi Sugawara , Yoshito Ikeda
IPC分类号： B32B1900
CPC分类号： B82Y25/00 , B82Y10/00 , B82Y40/00 , G01R33/093 , G01R33/098 , G11B5/332 , G11B5/3903 , G11B2005/3996 , H01F10/3254 , H01F41/307 , H01L43/08 , Y10S428/90 , Y10T428/1114 , Y10T428/1193
摘要： A magnetic tunnelling element in which the tunnel current flows reliably in an insulating layer to exhibit a stable magnetic tunnelling effect. To this end, the magnetic tunnelling element at least includes a first magnetic layer, a tunnel barrier layer formed on the first magnetic layer and a second magnetic layer formed on the tunnel barrier layer. The tunnel current flows via the tunnel barrier layer between the first magnetic metal layer and the second magnetic metal layer. The surface of the first magnetic layer carrying the tunnel barrier layer has a surface roughness (Ra) of 0.3 nm or less.
摘要翻译：一种磁隧道元件，其中隧道电流在绝缘层中可靠地流动以呈现稳定的磁隧道效应。为此，磁隧道元件至少包括第一磁性层，形成在第一磁性层上的隧道势垒层和形成在隧道势垒层上的第二磁性层。隧道电流通过第一磁性金属层和第二磁性金属层之间的隧道势垒层流动。携带隧道势垒层的第一磁性层的表面的表面粗糙度（Ra）为0.3nm以下。

4. 发明授权

US5515222A Magnetic head core arrangement having medium facing surface sides formed of single-crystal ferrite 失效
标题翻译：具有由单晶铁素体形成的具有介质相对表面侧的磁头芯布置
公开(公告)号：US5515222A
公开(公告)日：1996-05-07
申请号：US235798
申请日：1994-04-29
申请人： Seiji Kumagai , Junichi Honda , Yoshitomo Ito , Masatoshi Hayakawa , Toru Matsunaga , Mineo Yorizumi , Yoshito Ikeda
发明人： Seiji Kumagai , Junichi Honda , Yoshitomo Ito , Masatoshi Hayakawa , Toru Matsunaga , Mineo Yorizumi , Yoshito Ikeda
IPC分类号： G11B5/127 , G11B5/133 , G11B5/23 , G11B5/187
CPC分类号： G11B5/133
摘要： In a magnetic head having a pair of magnetic cores defining a magnetic gap in-between, a side of each magnetic core facing a recording medium is formed of a single-crystal ferrite, with the remaining portions of each magnetic core being formed of poly-crystal ferrite. The surface of the magnetic core facing the recording medium and the abutment surface of the magnetic core are the {100} plane and the {100} plane of the single-crystal ferrite, respectively. The magnetic head has excellent abrasion resistance and electro-magnetic conversion characteristics.
摘要翻译：在具有在其间限定有磁隙的一对磁芯的磁头中，每个磁芯的与记录介质相对的一侧由单晶铁氧体形成，其中每个磁芯的其余部分由聚 - 晶体铁素体。面向记录介质的磁芯的表面和磁芯的邻接表面分别是单晶铁氧体的{100}面和{100}面。磁头具有优异的耐磨性和电磁转换特性。

5. 发明授权

US06535364B1 Magnetic resistance element having four magnetization states and a magnetic device using the same 有权
标题翻译：具有四个磁化状态的磁阻元件和使用其的磁性装置
公开(公告)号：US06535364B1
公开(公告)日：2003-03-18
申请号：US09482914
申请日：2000-01-14
申请人： Seiji Kumagai , Yoshito Ikeda , Terunobu Miyazaki , Yoshiyuki Fukumoto
发明人： Seiji Kumagai , Yoshito Ikeda , Terunobu Miyazaki , Yoshiyuki Fukumoto
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/06 , G11B5/3903 , G11B5/3909 , G11B2005/3996 , G11C11/5607 , G11C2211/5615 , H01F10/3254 , H01F10/3268
摘要： A magnetic resistance element is provided that includes an upper magnetic layer, which is formed in contact with an anti-ferromagnetic layer, and at least two magnetic layers that are layered with tunnel barrier wall layers respectively inserted between the first magnetic layer and each of the at least two magnetic layers such that the magnetic resistance element has a combined resistance that corresponds to one of four predefined magnetic resistances and that can be changed to another of the four predefined magnetic resistances by applying a predefined recording magnetic field pattern to the magnetic resistance element.
摘要翻译：提供了一种磁阻元件，其包括形成为与反铁磁层接触的上磁性层，以及分别插入在第一磁性层和第一磁性层之间的隧道阻挡壁层的至少两个磁性层至少两个磁性层，使得磁阻元件具有对应于四个预定义的磁阻之一的组合电阻，并且可以通过将预定义的记录磁场图案施加到磁阻元件上而改变为四个预定义的磁阻中的另一个。

6. 发明授权

US06519123B1 Method to manufacture magnetic tunneling elements using inductively coupled plasma 有权
标题翻译：使用电感耦合等离子体制造磁性隧道元件的方法
公开(公告)号：US06519123B1
公开(公告)日：2003-02-11
申请号：US09392554
申请日：1999-09-09
申请人： Junichi Sugawara , Eiji Nakashio , Seiji Kumagai , Yoshito Ikeda
发明人： Junichi Sugawara , Eiji Nakashio , Seiji Kumagai , Yoshito Ikeda
IPC分类号： G11B5139
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/06 , G11B5/3163 , G11B5/33 , G11B5/332 , G11B5/3903 , G11B2005/3996 , H01L43/08
摘要： A magnetic tunneling element in which the tunnel current flows reliably to exhibit a stable magnetic tunneling effect. The magnetic tunneling element includes a first magnetic layer, a tunnel barrier layer formed on the first magnetic layer, and a second magnetic layer formed on the tunnel barrier layer. The tunnel barrier layer is a metal film oxidized by inductively coupled oxygen plasma and a second magnetic layer is formed on the tunnel barrier layer.
摘要翻译：隧道电流可靠地流动以表现出稳定的磁隧道效应的磁隧道元件。磁隧道元件包括第一磁性层，形成在第一磁性层上的隧道势垒层和形成在隧道势垒层上的第二磁性层。隧道势垒层是通过电感耦合氧等离子体氧化的金属膜，在隧道势垒层上形成第二磁性层。

7. 发明授权

US06452892B1 Magnetic tunnel device, method of manufacture thereof, and magnetic head 有权
标题翻译：磁隧道装置，其制造方法和磁头
公开(公告)号：US06452892B1
公开(公告)日：2002-09-17
申请号：US09486140
申请日：2000-05-01
申请人： Seiji Kumagai , Junichi Honda , Yoshito Ikeda
发明人： Seiji Kumagai , Junichi Honda , Yoshito Ikeda
IPC分类号： G11B700
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3909 , G11B2005/3996 , G11C11/16 , H01F10/3254 , H01L43/08
摘要： First and second magnetic layers are laminated though a tunnel barrier layer, wherein a region is formed in which change in a magnetic resistance ratio with respect to change in a voltage applied in such a manner that the second magnetic layer has a lower potential as compared with the potential of the first magnetic layer is smaller than change in a magnetic resistance ratio with respect to change in a voltage applied in such a manner that the second magnetic layer has a higher potential as compared with the potential of the first magnetic layer. Voltage is applied to the magnetic tunnel device in such a manner that the potential of the second magnetic layer is lower than that of the first magnetic layer so that dependency of the magnetic resistance ratio on the voltage is reduced. Thus, a stable tunnel current flows.
摘要翻译：第一和第二磁性层通过隧道势垒层层叠，其中形成一个区域，其中以相对于第二磁性层具有较低电位的方式施加电压的变化的磁阻比的变化，与第一磁性层的电位相比，第一磁性层的电位相对于施加的电压的变化的磁阻比的变化小于第二磁性层具有较高的电位。以使第二磁性层的电位低于第一磁性层的电位的方式将电压施加到磁隧道器件，使得磁阻比对电压的依赖性降低。因此，稳定的隧道电流流动。

8. 发明授权

US4974716A Device for feeding can barrels 失效
标题翻译：饲料装置可以装桶
公开(公告)号：US4974716A
公开(公告)日：1990-12-04
申请号：US340703
申请日：1989-04-20
申请人： Haruyuki Yuri , Isao Ibane , Seiji Kumagai
发明人： Haruyuki Yuri , Isao Ibane , Seiji Kumagai
IPC分类号： B65C9/04 , B65G47/84
CPC分类号： B65C9/04 , B65G47/848 , B65G2201/0244
摘要： A plurality of rotatable attracting units are mounted on a rotary member each for attracting the bottom of one can barrel supplied from a supply path in a first position. Each of the attracting units is inactivatable to release the can barrel onto a conveyor path in a second position after the can barrel has been rotated by the rotary member through a prescribed angle from the first position to the second position. A holder is disposed for holding in the first position the can barrels, one at a time, supplied from the supply path while centrally aligning the bottom of the can barrel with the center of rotation of the attracting unit. The holder includes, in the first position below the the supply path, a rotary body having a plurality of recessed defined in an outer periphery thereof each for supporting a side of a can barrel supplied from the supply path, and a drive device for intermittently rotating the rotary body in synchronism with the rotary member. The radius of a circle along which the can barrels supported by the recesses of the rotary body are rotated by the rotary body is smaller than the radius of a circle along which the can barrels attracted by the attracting units are rotated by the rotary member.
摘要翻译：多个可旋转吸引单元安装在旋转构件上，用于吸引从第一位置的供给路径供给的一个罐筒的底部。每个吸引单元都是灭活的，以便在桶筒已被旋转构件从第一位置转动到第二位置之后以规定的角度旋转之后，将罐筒释放到第二位置的输送路径上。保持器被设置成用于在罐的桶底部与吸引单元的旋转中心对齐的同时从供给路径一次一个地保持罐桶的第一位置。保持器在供给路径下方的第一位置包括：旋转体，其具有限定在其外周中的多个凹部，用于支撑从供给路径供给的罐筒的一侧;以及驱动装置，用于间歇旋转旋转体与旋转构件同步。旋转体由旋转体的凹部支撑的罐筒沿其旋转的圆的半径小于由吸引单元吸引的罐筒旋转的圆的半径。

9. 发明申请

US20090161249A1 MAGNETIC TAPE, MAGNETIC TAPE APPARATUS, SERVO PATTERN RECORDING APPARATUS, MAGNETIC TAPE PRODUCING METHOD, AND MAGNETIC TAPE RECORDING METHOD 有权
标题翻译：磁带，磁带装置，伺服图形记录装置，磁带制作方法及磁带记录方法
公开(公告)号：US20090161249A1
公开(公告)日：2009-06-25
申请号：US12337103
申请日：2008-12-17
申请人： Jun TAKAYAMA , Seiji Kumagai
发明人： Jun TAKAYAMA , Seiji Kumagai
IPC分类号： G11B5/584 , G11B5/78
CPC分类号： G11B5/584
摘要： Provided is a magnetic tape that includes a data band, including servo patterns, data, and a guard space. The servo patterns is formed along a longitudinal direction of the magnetic tape with an interval provided between each of the servo patterns, each of the servo patterns formed across a full width of the data band. The data is disposed between the servo patterns. The guard space is disposed between each of the servo patterns and the data.
摘要翻译：提供一种磁带，其包括包括伺服图案，数据和保护空间的数据带。伺服图形沿着磁带的纵向方向形成，间隔设置在每个伺服图案之间，每个伺服图案形成在数据带的整个宽度上。数据设置在伺服模式之间。保护空间设置在每个伺服模式和数据之间。

10. 发明授权

US06219213B1 Magnetic head with magnetic tunnel element in which induced magnetic field changes relative angle of magnetization which affects tunnel current 失效
标题翻译：具有磁隧道元件的磁头，其中感应磁场改变影响隧道电流的相对磁化角
公开(公告)号：US06219213B1
公开(公告)日：2001-04-17
申请号：US09105015
申请日：1998-06-26
申请人： Kazuo Goto , Seiji Kumagai
发明人： Kazuo Goto , Seiji Kumagai
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1871 , G11B5/332 , G11B5/3903 , G11B5/3909 , G11B5/3916 , G11B5/3967
摘要： The present invention provides a magnetic head which has a magnetic circuit of a reduced size to cope with a high density recording and a preferable recording/reproduction characteristic. The magnetic head according to the present invention has at least partially a non-magnetic body 7 and includes: a magnetic circuit block 6 constituted by magnetic bodies arranged to oppose each other via the non-magnetic body 7; and a magnetic tunnel element 1 attached to this magnetic circuit block 6 and having a first magnetic layer 2 and a second magnetic layer 4 which are layered via an insulation layer 3. In this magnetic head, a magnetic field from a magnetic recording medium is induced to the magnetic circuit block and the induced magnetic field changes a relative angle of magnetization of the first magnetic layer 2 and/or the second magnetic layer 4 with the other magnetic layer of the magnetic tunnel element 1.
摘要翻译：本发明提供一种具有减小尺寸的磁路以应对高密度记录和优选的记录/再现特性的磁头。根据本发明的磁头至少部分地具有非磁性体7，并且包括：由经由非磁性体7彼此相对布置的磁体构成的磁路块6; 以及安装在该磁路块6上并具有通过绝缘层3层叠的第一磁性层2和第二磁性层4的磁性隧道元件1.在该磁头中，产生来自磁记录介质的磁场并且感应磁场改变第一磁性层2和/或第二磁性层4与磁性隧道元件1的另一磁性层的磁化的相对角度。

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