公开(公告)号：US06346338B1

公开(公告)日：2002-02-12

申请号：US09685435

申请日：2000-10-10

Applicant: Toshinori Watanabe ,  Akira Takahashi ,  Fumihito Koike ,  Nobuhiro Hayashi ,  Yoshihiro Kanada ,  Kiyoshi Kobayashi ,  Kiyoshi Sato ,  Eiji Umetsu ,  Takashi Hatanai ,  Akihiro Makino

Inventor： Toshinori Watanabe ,  Akira Takahashi ,  Fumihito Koike ,  Nobuhiro Hayashi ,  Yoshihiro Kanada ,  Kiyoshi Kobayashi ,  Kiyoshi Sato ,  Eiji Umetsu ,  Takashi Hatanai ,  Akihiro Makino

IPC: G11B539

CPC classification number: G11B5/3967 ,  G11B5/112 ,  G11B5/3106 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3903 ,  H01F10/131 ,  H01F10/265 ,  Y10S428/90 ,  Y10T428/1143 ,  Y10T428/1171 ,  Y10T428/12465 ,  Y10T428/12472 ,  Y10T428/12576 ,  Y10T428/1259 ,  Y10T428/1266 ,  Y10T428/12674 ,  Y10T428/12806 ,  Y10T428/12854 ,  Y10T428/12861 ,  Y10T428/12875 ,  Y10T428/12931

Abstract: A thin film magnetic head includes an upper core layer and a lower core layer which are made of an Fe—M—O alloy, an Fe—M—T—O alloy or an NI—Fe—X alloy so that the upper core layer has a high saturation magnetic flux density, low coercive force and high resistivity, and the lower core layer has a lower saturation magnetic flux density than the upper core layer, low coercive force, high resistivity, and a low magnetostriction constant. Also the lower core layer is formed so that the thickness gradually decreases toward both side ends, and a gap layer can be formed on the lower core layer to have a uniform thickness. Since the lower core layer is formed by sputtering, a material having excellent soft magnetic material can be used, thereby enabling recording at high frequency.

Abstract translation: 薄膜磁头包括由Fe-Mo合金，Fe-MTO合金或NI-Fe-X合金制成的上芯层和下芯层，使得上芯层具有高的饱和磁通量 密度低，矫顽力低，电阻率高，下芯层具有比上芯层低的饱和磁通密度，低矫顽力，高电阻率和低磁致伸缩常数。 此外，下芯层形成为使得厚度朝向两个侧端逐渐减小，并且可以在下芯层上形成间隙层以具有均匀的厚度。 由于通过溅射形成下芯层，因此可以使用具有优异的软磁性材料的材料，从而能够以高频进行记录。

公开(公告)号：US20020012208A1

公开(公告)日：2002-01-31

申请号：US09962782

申请日：2001-09-25

Applicant: FUJITSU LIMITED

Inventor： Naoki Mukouyama

IPC: G11B005/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3113 ,  G11B5/3903 ,  G11B2005/3996

Abstract: The present invention is to provide a magnetoresistance effect type head which well generates the information stored in a memory device at high memory density while limiting the generation of Barkhausen noises. The magnetoresistance effect type head comprises a magnetoresistance effect element which contains a free magnetic layer having an overhang portion which is overhung and spread in left and right directions and is changed in resistance by a change in the azimuth of the magnetization of the free magnetic layer, and paired upper and lower magnetic wall control layers which are in contact with the upper and under surfaces of the left and right overhang portions of the free magnetic layer respectively and restrict the movement of the magnetic wall of the free magnetic layer.

Abstract translation: 本发明提供一种磁阻效应型磁头，其以高存储密度良好地生成存储在存储装置中的信息，同时限制了巴克豪森噪声的产生。 磁阻效应型磁头包括磁阻效应元件，该磁阻效应元件包含具有悬垂部分的自由磁性层，其悬垂并在左右方向上扩展，并且通过自由磁层的磁化方位的变化而改变电阻， 以及分别与自由磁性层的左右悬垂部分的上表面和下表面接触的上，下磁壁控制层，并限制自由磁性层的磁壁的移动。

公开(公告)号：US20010053043A1

公开(公告)日：2001-12-20

申请号：US09481939

申请日：2000-01-13

Inventor： Kiyosumi Kanazawa ,  Yoshiro Nakagawa

IPC: G11B005/127 ,  C23C014/34 ,  G11B005/33

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3903 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/3996 ,  H01L43/08

Abstract: The present invention is directed to an MR element and a thin film magnetic head that do not cause an increase in the electrical resistance value due to the presence of dead zones. When forming passive areas that include magnetic domain control films and conductive films at the two sides of a central active area through a vacuum film formation method, the magnetic domain control films are formed under film forming conditions that are different from the film forming conditions under which the conductive films are formed to ensure that the degree to which the conductive films overlap the central active area is set larger than the degree to which the magnetic domain control films overlap the central active area.

Abstract translation: 本发明涉及不会由于存在死区而导致电阻值增加的MR元件和薄膜磁头。 当通过真空成膜法在中心活性区域的两侧形成包括磁畴控制膜和导电膜的无源区域时，在与成膜条件不同的成膜条件下形成磁畴控制膜， 形成导电膜以确保导电膜与中心有源区重叠的程度被设定为大于磁畴控制膜与中心有效区重叠的程度。

公开(公告)号：US06307708B1

公开(公告)日：2001-10-23

申请号：US09268322

申请日：1999-03-16

Applicant: Hiroaki Yoda ,  Masatoshi Yoshikawa ,  Yuichi Ohsawa ,  Tomomi Funayama

Inventor： Hiroaki Yoda ,  Masatoshi Yoshikawa ,  Yuichi Ohsawa ,  Tomomi Funayama

IPC: G11B5147

CPC classification number: B82Y25/00 ,  G01R33/093 ,  G11B5/127 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/3903 ,  G11B5/3925 ,  G11B5/3967 ,  G11B5/66 ,  H01F10/3218

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06301086B1

公开(公告)日：2001-10-09

申请号：US09433311

申请日：1999-11-03

Applicant: Taisuke Hirooka

Inventor： Taisuke Hirooka

IPC: G11B539

CPC classification number: G11B5/3903 ,  G11B5/3103 ,  G11B5/3113

Abstract: A thin-film magnetic head supporting structure includes: an FeAlSi alloy film; a ceramic substrate used for structural support of the FeAlSi alloy film; and an intermediate multilayer structure disposed between the FeAlSi alloy film and the ceramic substrate. The intermediate multilayer structure includes a Cr film and an Fe film, which are stacked in this order over the ceramic substrate.

Abstract translation: 薄膜磁头支撑结构包括：FeAlSi合金膜; 用于FeAlSi合金膜结构支撑的陶瓷基体; 以及设置在FeAlSi合金膜和陶瓷基板之间的中间多层结构。 中间多层结构包括Cr膜和Fe膜，它们依次层叠在陶瓷基板上。

公开(公告)号：US06278590B1

公开(公告)日：2001-08-21

申请号：US09204996

申请日：1998-12-02

Applicant: Hardayal Singh Gill ,  John David Westwood

Inventor： Hardayal Singh Gill ,  John David Westwood

IPC: G11B5127

CPC classification number: G11B5/3967 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/3113

Abstract: A material is provided for the first shield and/or second shield/first pole piece layer of a merged MR head. The material employed is nickel cobalt (Ni70Co30) (wt. %) or a nickel iron cobalt alloy. In a second shield/first pole piece layer a further preferred embodiment is first and second layers wherein the first layer is nickel cobalt or a nickel iron cobalt alloy and the second layer is a laminate of a high magnetic material, such as iron nitride (FeN) laminated with aluminum oxide (Al2O3). The nickel cobalt or nickel iron cobalt alloy layers have a higher intrinsic anisotropic (HK) and can better withstand the processing fields employed during the various annealing steps in the construction of the head. Accordingly, the magnetic domains of the first and second shield layers do not change position from a desired parallel position to the ABS. By maintaining their parallel position, applied fields during the operation of the head, such as from the write head or the media, does not move the domain walls around to cause Barkhausen noise. The high magnetic moment laminated layer for the second shield/first pole piece layer serves as a good first pole piece flux conducting layer for the write head portion of the magnetic head. Accordingly, the second shield/first pole piece layer serves two functions, namely a stable shield for the read head and conducting flux for the write head.

Abstract translation: 为合并的MR头的第一屏蔽和/或第二屏蔽/第一极片层提供材料。 所使用的材料是镍钴（Ni70Co30）（重量％）或镍铁钴合金。 在第二屏蔽/第一极片层中，另一优选实施例是第一和第二层，其中第一层是镍钴或镍铁钴合金，第二层是高磁性材料如氮化铁（FeN ）与氧化铝（Al2O3）层压。 镍钴或镍钴钴合金层具有较高的固有各向异性（HK），并且可以更好地承受头部结构中各种退火步骤期间采用的加工领域。 因此，第一屏蔽层和第二屏蔽层的磁畴不会从所期望的平行位置改变到ABS。 通过保持它们的平行位置，诸如来自写入头或介质的头部操作期间的施加区域不会使域壁移动以引起Barkhausen噪声。 用于第二屏蔽/第一极片层的高磁矩层叠层用作用于磁头的写入头部分的良好的第一极片通量传导层。 因此，第二屏蔽/第一极片层具有两个功能，即读头的稳定屏蔽和用于写头的导通磁通。

公开(公告)号：US06278579B1

公开(公告)日：2001-08-21

申请号：US09345651

申请日：1999-06-30

Applicant: Shun-ichi Narumi ,  Hiroshi Fukui ,  Moriaki Fuyama ,  Matahiro Komuro

Inventor： Shun-ichi Narumi ,  Hiroshi Fukui ,  Moriaki Fuyama ,  Matahiro Komuro

IPC: G11B5147

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3156 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

Abstract: An inductive thin-film magnetic head with small flucuations of the reproduction output and noises for reproduction is disclosed. The forward end of each of a lower an upper magnetic and an upper magnetic core has the same width as the track. The rear end of each of the lower magnetic core and the upper magnetic core, on the other hand, is wider than the forward end thereof in the direction of the track. Also, the lower magnetic core is formed of at least two magnetic layers with a non-magnetic layer interposed therebetween.

Abstract translation: 公开了一种具有小的再现输出和再现噪声的感应薄膜磁头。 每个下磁体和上磁芯的前端具有与轨道相同的宽度。 另一方面，下磁芯和上磁芯各自的后端比轨道方向的前端宽。 此外，下磁芯由至少两个介于其间的非磁性层的磁性层形成。

公开(公告)号：US06259583B1

公开(公告)日：2001-07-10

申请号：US09154527

申请日：1998-09-16

Applicant: Robert Edward Fontana, Jr. ,  Yimin Hsu ,  Prakash Kasiraj ,  Mason Lamar Williams

Inventor： Robert Edward Fontana, Jr. ,  Yimin Hsu ,  Prakash Kasiraj ,  Mason Lamar Williams

IPC: G11B5147

CPC classification number: G11B5/3153 ,  G11B5/3113 ,  G11B5/3156

Abstract: The present invention is a magnetic head which has a preferably planar pole member having a yoke and a tip with a first planar pole P1 and a second planar pole P2 positioned above pole P1. The pole member is built up of two types of layers: a first type of layer with high magnetic permeability &mgr; and low anisotropy Hk, with the easy axis oriented substantially perpendicular to the flux propagation direction to ensure rapid response, and a second layer type which is non-magnetic. The magnetic head also has a domain control element whose magnetization in the vicinity of the pole tip P2 and in the absence of applied field is aligned along the length of the element so as to facilitate the conduction of flux between poles P1 and P2. The domain control element can be a non-laminated element made of a material with high saturation magnetization MS such as NiFe, Ni80Fe20, Ni45Fe55, NiFeCo, FeCo, CoZrNb, FeAlN and FeTaN and proper dimensioning of the element further increases the flux conduction efficiency.

Abstract translation: 本发明是一种磁头，其具有优选的具有磁轭的平面磁极部件和具有位于磁极P1上方的第一平面磁极P1和第二平面磁极P2的末端。 极构件由两种类型的层构成：具有高磁导率μm和低各向异性H k的第一类型的层，易轴定向为基本上垂直于磁通传播方向，以确保快速响应，以及第二层类型 是非磁性的。 磁头还具有域控制元件，其磁极尖端P2附近的磁化和不存在施加磁场的磁化沿着元件的长度排列，以便于磁极P1和P2之间的磁通传导。 域控制元件可以是由诸如NiFe，Ni80Fe20，Ni45Fe55，NiFeCo，FeCo，CoZrNb，FeAlN和FeTaN的高饱和磁化MS的材料制成的非层叠元件，并且元件的适当尺寸进一步增加了通量传导效率。

公开(公告)号：US06256863B1

公开(公告)日：2001-07-10

申请号：US08815179

申请日：1997-03-11

Applicant: Kazuhiro Saito ,  Akiko Saito ,  Hitoshi Iwasaki ,  Akihiko Tsutai ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Yuichi Ohsawa ,  Masahi Sahashi ,  Yuzo Kamiguchi

Inventor： Kazuhiro Saito ,  Akiko Saito ,  Hitoshi Iwasaki ,  Akihiko Tsutai ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Yuichi Ohsawa ,  Masahi Sahashi ,  Yuzo Kamiguchi

IPC: G11B542

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3916 ,  G11B2005/3996 ,  Y10T29/49034

Abstract: A magnetic yoke having a magnetic gap provided in the side of the surface facing the medium is disposed on the surface of a substrate. An MR film is disposed on the surface of the magnetic yoke substantially parallel to the substrate with a predetermined separation from the surface S facing the medium. At least both end portions of the MR film are magnetically coupled to the magnetic yoke. A pair of leads for supplying sensing current to the MR film have magnetic lead portions formed from the same magnetic layers as the magnetic yoke. The magnetic lead portions curb deterioration of MR head properties and yield reduction during formation of the leads. Furthermore, a bias magnetic field is applied to the magnetic yoke and the MR film at least during operation of the head. This bias magnetic field is for instance provided by a magnetic field induced by the electric current. Alternatively, a magnetic field induced by the electric current is applied while heat-processing the magnetic yoke. Magnetic anisotropy is induced to the magnetic yoke in a direction differing according to the position. This magnetic anisotropy curbs Barkhausen noise caused by the magnetic yoke.

Abstract translation: 在基板的表面上设置具有设置在面向介质的表面侧的磁隙的磁轭。 以与面向介质的表面S预定间隔的方式将磁性薄膜基本上平行于基板平行设置在磁轭的表面上。 MR膜的至少两个端部磁耦合到磁轭。 用于向MR膜提供感测电流的一对引线具有由与磁轭相同的磁性层形成的磁性引线部分。 磁性引线部分在引线形成期间抑制MR磁头特性的劣化和屈服减少。 此外，至少在头部的操作期间，向磁轭和MR膜施加偏置磁场。 该偏置磁场例如由电流引起的磁场提供。 或者，在对磁轭进行加热处理的同时施加由电流引起的磁场。 磁性各向异性在根据位置不同的方向上被引到磁轭上。 这种磁各向异性限制了由磁轭引起的Barkhausen噪声。

公开(公告)号：US06233116B1

公开(公告)日：2001-05-15

申请号：US09192388

申请日：1998-11-13

Applicant: Yingjian Chen ,  Zhupei Shi ,  Syed Hossain

Inventor： Yingjian Chen ,  Zhupei Shi ,  Syed Hossain

IPC: G11B5147

CPC classification number: G11B5/3109 ,  G11B5/3113 ,  G11B5/313 ,  G11B5/3156

Abstract: The present invention provides a thin film write head having an improved laminated flux carrying structure and method of fabrication. The preferred embodiment provides laminated layers of: high moment magnetic material, and easily aligned high resistivity magnetic material. In the preferred embodiment, the easily aligned laminating layer induces uniaxial anisotropy, by exchange coupling, to improve uniaxial anisotropy in the high moment material. This allows deposition induced uniaxial anisotropy by DC magnetron sputtering and also provides improved post deposition annealing, if desired. It is preferred to laminate FeXN, such as FeRhN, or other crystalline structure material, with an amorphous alloy material, preferably Co based, such as CoZrCr. In the preferred embodiment, upper and lower pole structures may both be laminated as discussed above. Such laminated structures have higher Bs than structures with insulative laminates, and yokes and pole tips and may be integrally formed, if desired, because flux may travel along or across the laminating layers. The preferred embodiment of the present invention improves soft magnetic properties, reduces eddy currents, improves hard axis alignment while not deleteriously affecting the coercivity, permeability, and magnetostriction of the structure, thus allowing for improved high frequency operation.

Abstract translation: 本发明提供一种具有改进的层叠助焊剂携带结构和制造方法的薄膜写入头。 优选的实施例提供了叠层层：高力矩磁性材料和容易对准的高电阻率磁性材料。 在优选实施例中，容易对准的层压层通过交换耦合引起单轴各向异性，以提高高力矩材料中的单轴各向异性。 这允许通过DC磁控溅射沉积诱导的单轴各向异性，并且如果需要，还提供改进的后沉积退火。 优选将FeXN如FeRhN或其它晶体结构材料与非晶合金材料（优选Co基）如CoZrCr层压。 在优选实施例中，如上所述，可以将上极和下极结构层叠。 如果需要，这种层压结构具有比具有绝缘层压板的结构更高的Bs，并且轭和磁极尖端可以一体地形成，因为焊剂可以沿着或穿过层压层行进。 本发明的优选实施例提高了软磁性能，降低涡流，改善了硬轴对准，同时不会有害地影响结构的矫顽力，磁导率和磁致伸缩，从而改善了高频运行。