公开(公告)号：US07440237B2

公开(公告)日：2008-10-21

申请号：US11214711

申请日：2005-08-31

申请人： Noriaki Kasahara ,  Nozomu Hachisuka

发明人： Noriaki Kasahara ,  Nozomu Hachisuka

IPC分类号： G11B5/00 ,  G11B5/33 ,  G11B5/127

CPC分类号： G11B5/4826 ,  G11B5/31

摘要： In a thin film magnetic head of the present invention, lead formation patterns of a first lead for connection between a lower shield layer and a first extraction electrode portion and a second lead for connection between an upper shield layer and a second extraction electrode portion are each formed so as not to have an overlapping portion with a heatsink layer but to bypass the heatsink layer when observing from the upper shield layer side toward the lower shield layer in a transparent state in plan view. Therefore, it is possible to increase an effect of heat radiation to the substrate side on the basis of the presence of the heatsink layer to thereby limit propagation of heat to a magnetoresistive effect layer as much as possible and further to achieve a drastic improvement in recording and reproducing characteristics at high recording frequencies, i.e. frequency characteristics (f characteristics) in a high frequency region.

摘要翻译： 在本发明的薄膜磁头中，分别在下屏蔽层和第一引出电极部分之间连接的第一引线和上屏蔽层与第二引出电极部分之间的用于连接的第二引线的引线形成图案分别为 形成为在平面图中以透明状态从上屏蔽层侧向下屏蔽层观察时，不具有与散热层重叠的部分，而是绕过散​​热层。 因此，可以基于散热层的存在来增加对基板侧的散热效果，从而尽可能地限制热到磁阻效应层的传播，并进一步实现记录的急剧改善 并且在高记录频率下再现特性，即高频区域的频率特性（f特性）。

公开(公告)号：US07287316B2

公开(公告)日：2007-10-30

申请号：US10195106

申请日：2002-07-15

申请人： Noriaki Kasahara ,  Nozomu Hachisuka ,  Yasutoshi Fujita

发明人： Noriaki Kasahara ,  Nozomu Hachisuka ,  Yasutoshi Fujita

IPC分类号： B23P19/00 ,  G11B5/187

CPC分类号： B82Y25/00 ,  G01R33/093 ,  G11B5/3116 ,  G11B5/3166 ,  G11B5/3903 ,  Y10T29/49041 ,  Y10T29/53165

摘要： A lapping monitor element that is juxtaposed with a magnetic transducer element having a magnetoresistance effect film to determine the lapping position upon lapping the element height of the magnetic transducer element to a predetermined dimension. The lapping monitor element includes a resistance film to be resistance measured. The resistance film is a metal film of nonmagnetic transition metal or of alloy composed mainly of nonmagnetic transition metal, or a multilayered film where two or more such metal films are laid one upon another. The lapping monitor makes it possible to extremely stabilize the ELG sensor resistance measured values upon lapping as well as to provide a high accuracy MR height control.

摘要翻译： 研磨监测元件，其与具有磁阻效应膜的磁换能器元件并置，以在将磁换能器元件的元件高度研磨到预定尺寸时确定研磨位置。 研磨监测元件包括测量电阻的电阻膜。 电阻膜是主要由非磁性过渡金属组成的非磁性过渡金属或合金的金属膜，或者其中两个或更多个这样的金属膜彼此叠置的多层膜。 研磨监测器可以在研磨时极大地稳定ELG传感器电阻测量值，并提供高精度的MR高度控制。

公开(公告)号：US20060067010A1

公开(公告)日：2006-03-30

申请号：US10971113

申请日：2004-10-25

申请人： Takeo Kagami ,  Takayasu Kanaya ,  Noriaki Kasahara ,  Kazuki Sato

发明人： Takeo Kagami ,  Takayasu Kanaya ,  Noriaki Kasahara ,  Kazuki Sato

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/332 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A manufacturing method of a thin-film magnetic head includes a step of depositing an MR multi-layered film on a lower electrode layer, a step of patterning the deposited MR multi-layered film to define a track width, a step of forming a layer containing at least first insulation layer at both track-width direction sides of the patterned MR multi-layered film, a step of depositing a first additional upper metal layer on the patterned MR multi-layered film and on the layer containing at least first insulation layer, a step of patterning the first additional upper metal layer and the MR multi-layered film to define a length in a direction perpendicular to the track-width direction so as to obtain an MR multi-layered structure, a step of forming a second insulation layer to surround the first additional upper metal layer and the MR multi-layered structure, a step of removing by etching the second insulation layer on the first additional upper metal layer formed on the MR multi-layered structure, a step of thereafter, forming a second additional upper metal layer on the first additional upper metal layer and on the second insulation layer, and a step of forming an upper electrode layer on the second additional upper metal layer.

摘要翻译： 薄膜磁头的制造方法包括在下电极层上沉积MR多层膜的步骤，对沉积的MR多层膜进行图案化以限定磁道宽度的步骤，形成层的步骤 在图案化MR多层膜的两个轨道宽度方向侧上至少含有第一绝缘层，在图案化MR多层膜上沉积第一附加上金属层和在至少包含第一绝缘层的层上沉积步骤 图案化第一附加上金属层和MR多层膜以在垂直于轨道宽度方向的方向上限定长度以获得MR多层结构的步骤，形成第二绝缘体的步骤 层以围绕第一附加上金属层和MR多层结构，通过蚀刻在形成在MR多层结构上的第一附加上金属层上的第二绝缘层去除步骤 其次，在第一附加上金属层和第二绝缘层上形成第二另外的上金属层，以及在第二另外的上金属层上形成上电极层的步骤。

公开(公告)号：US20050201018A1

公开(公告)日：2005-09-15

申请号：US11067643

申请日：2005-02-28

申请人： Kentaro Nagai ,  Takeo Kagami ,  Noriaki Kasahara ,  Naoki Ohta ,  Satoshi Miura

发明人： Kentaro Nagai ,  Takeo Kagami ,  Noriaki Kasahara ,  Naoki Ohta ,  Satoshi Miura

IPC分类号： G11B5/39 ,  G11B5/127 ,  G11B5/33

CPC分类号： G11B5/3912 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3909 ,  G11B2005/3996

摘要： A magnetic head is provided for further improving a correlation between the dynamic characteristics and static characteristics. A lower magnetic shield layer, a magneto-resistive layer, and an upper magnetic shield layer are laminated on a base in this order. A lower lead layer and an upper lead layer apply a sense current to the magneto-resistive layer in a direction substantially perpendicular to the film plane thereof through the magnetic shield layers. The lower magnetic shield layer and upper magnetic shield layer have their shapes and sizes which substantially exactly overlap each other, when viewed in a laminating direction. The lower lead layer is electrically connected to the lower magnetic shield layer. At least a portion of the lower lead layer closer to the lower magnetic shield layer is made of a non-magnetic conductive material. The upper lead layer is electrically connected to the upper magnetic shield layer. At least a portion of the upper lead layer closer to the upper magnetic shield layer is made of a non-magnetic conductive material.

摘要翻译： 提供磁头用于进一步改善动态特性和静态特性之间的相关性。 下部磁屏蔽层，磁阻层和上部磁屏蔽层依次层压在基座上。 下引线层和上引线层通过磁屏蔽层在大致垂直于其膜平面的方向上向磁阻层施加感测电流。 当从层叠方向观察时，下磁屏蔽层和上磁屏蔽层具有基本精确地彼此重叠的形状和尺寸。 下引线层电连接到下磁屏蔽层。 下引线层的更靠近下磁屏蔽层的至少一部分由非磁性导电材料制成。 上引线层电连接到上磁屏蔽层。 上导电层的至少一部分靠近上磁屏蔽层由非磁性导电材料制成。

公开(公告)号：US20050195536A1

公开(公告)日：2005-09-08

申请号：US11066763

申请日：2005-02-28

申请人： Takeo Kagami ,  Noriaki Kasahara ,  Kazuki Sato ,  Takayasu Kanaya

发明人： Takeo Kagami ,  Noriaki Kasahara ,  Kazuki Sato ,  Takayasu Kanaya

IPC分类号： G11B5/39 ,  G11B5/127 ,  G11B5/33

CPC分类号： G11B5/398 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932 ,  G11B2005/0008

摘要： The thin-film magnetic head of the present invention comprises an MR sensor wherein a first ferromagnetic layer in which a magnetization direction is fixed with respect to external magnetic fields, a non-magnetic intermediate layer, and a second ferromagnetic layer in which a magnetization direction changes with respect to the external magnetic fields are stacked, and wherein a sense current flows substantially parallel to the stacked layer surface. The thin-film magnetic head comprises a pair of bias layers for exerting a bias magnetic field upon the MR sensor; the bias layers extending substantially symmetrically from two sides of the MR sensor in a direction of track width of a recording medium, each bias layer being connected with the MR sensor over a length which is substantially the same as the MR sensor in a direction perpendicular to the air bearing surface; and each bias layer having a shape which is contained within an imaginary rectangle which has its long sides along the air bearing surface in the direction of the track width of the recording medium and its short sides in the direction perpendicular to the air bearing surface and which contacts the short side of the imaginary rectangle which is opposite the short side which contacts the MR sensor. The thin-film magnetic head further comprises a pair of lead layers for supplying the sense current to the MR sensor each extending from the air bearing surface to cover at least a portion of each of the bias layers.

摘要翻译： 本发明的薄膜磁头包括MR传感器，其中磁化方向相对于外部磁场固定的第一铁磁层，非磁性中间层和第二铁磁层，其中磁化方向 相对于外部磁场的变化被堆叠，并且其中感测电流基本上平行于堆叠的层表面流动。 薄膜磁头包括用于在MR传感器上施加偏置磁场的一对偏置层; 偏置层在MR传感器的两侧沿着记录介质的磁道宽度的方向基本上对称地延伸，每个偏置层在与MR传感器垂直的方向上与MR传感器基本相同的长度上与MR传感器连接 空气轴承表面; 并且每个偏置层具有包含在假想矩形内的形状，该假想矩形具有沿着记录介质的轨道宽度的空气轴承表面的长边，并且在垂直于空气轴承表面的方向上具有短边， 接触与MR传感器接触的短边相反的假想矩形的短边。 薄膜磁头还包括一对引导层，用于向MR传感器提供感测电流，每个引导层从空气支承表面延伸以覆盖每个偏置层的至少一部分。

公开(公告)号：US06583967B2

公开(公告)日：2003-06-24

申请号：US09879968

申请日：2001-06-14

申请人： Noriaki Kasahara ,  Koji Shimazawa

发明人： Noriaki Kasahara ,  Koji Shimazawa

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3919 ,  G11B5/3948 ,  G11B2005/3996

摘要： A thin-film magnetic head includes: a TMR element; a lower electrode layer and an upper electrode layer for feeding a current used for signal detection to the TMR element; and an insulating layer provided between the lower and upper electrode layers and located adjacent to a side of the TMR element. The thin-film magnetic head further includes: an FFG layer that introduces a signal flux to the TMR element, the FFG layer touching one of the top surfaces of the TMR element and extending from the region in which the TMR element is located to the region in which the insulating layer is located; and a base film located between the FFG layer and the insulating layer and used as a base when the FFG layer is formed.

摘要翻译： 薄膜磁头包括：TMR元件; 用于向TMR元件馈送用于信号检测的电流的下电极层和上电极层; 以及设置在下电极层和上电极层之间并且位于TMR元件的一侧附近的绝缘层。 薄膜磁头还包括：FFG层，其向TMR元件引入信号通量，FFG层接触TMR元件的顶表面之一并从TMR元件所位于的区域延伸到该区域 其中绝缘层位于其中; 以及位于FFG层和绝缘层之间的基膜，并且当形成FFG层时用作基底。

公开(公告)号：US06344954B1

公开(公告)日：2002-02-05

申请号：US09517580

申请日：2000-03-02

申请人： Olivier Redon ,  Koji Shimazawa ,  Noriaki Kasahara ,  Satoru Araki

发明人： Olivier Redon ,  Koji Shimazawa ,  Noriaki Kasahara ,  Satoru Araki

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3925 ,  G11B2005/3996

摘要： The present invention relates to a magneto-resistive tunnel junction head having a tunnel multilayered film composed of a tunnel barrier layer, and a ferromagnetic free layer and a ferromagnetic pinned layer formed to sandwich the tunnel barrier layer therebetween, wherein the ferromagnetic free layer comprises, in an integral fashion, a free layer main portion substantially constituting a part of the tunnel multilayered film, a front flux guide portion extending on a front side of the free layer main portion, and a back flux guide portion extending on a back side thereof, wherein the front flux guide portion constitutes a part of an ABS (Air Bearing Surface), and wherein a width-direction length Lm of the free layer main portion is set greater than a width-direction length Lf of the front flux guide portion and a width-direction length Lb of the back flux guide portion. Thus, there can be provided a magneto-resistive tunnel junction head with improved head performance, in particular, which is excellent in corrosion resistance and can achieve a high and stable head output for adaptation to the ultrahigh density recording using an improved longitudinal bias.

摘要翻译： 本发明涉及一种具有由隧道势垒层构成的隧道多层膜和形成为将隧道势垒层夹在其间的铁磁自由层和铁磁性钉扎层的磁阻隧道结头，其中铁磁自由层包括： 整体地形成基本上构成隧道多层膜的一部分的自由层主体部分，在自由层主体部分的前侧延伸的前部磁通引导部分和在其后侧延伸的后部磁通引导部分， 其特征在于，所述前部磁通导向部构成ABS（空气轴承面）的一部分，其中，所述自由层主体部的宽度方向长度Lm被设定为大于所述前部磁通导向部的宽度方向长度Lf， 后通量引导部的宽度方向长度Lb。 因此，可以提供具有改进的头部性能的磁阻隧道结头，特别是耐腐蚀性优异，并且可以使用改进的纵向偏压来实现用于适应超高密度记录的高稳定的头部输出。