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Patent Agency Ranking
公开(公告)号：US20140293473A1
公开(公告)日：2014-10-02
申请号：US13853293
申请日：2013-03-29
Applicant: TDK Corporation
Inventor： Shohei KAWASAKI , Shuji OKAME , Takayasu KANAYA , Satoshi MIURA , Kenzo MAKINO , Takumi YANAGISAWA , Takahiko MACHITA , Masashi SANO , Hideyuki UKITA
IPC: G11B5/39
CPC classification number: G11B5/3932 , B82Y10/00 , G11B5/3909 , G11B2005/3996
Abstract: A thin film magnetic head includes a spin valve film that includes a magnetization free layer, a magnetization pinned layer and a non-magnetic spacer layer that is disposed between the magnetization free and pinned layers, and a pair of side layers that are disposed at both sides of the spin valve film in a track width direction and at least in the vicinity of the magnetization free layer and the magnetization pinned layer. Each of the side layers has a bias magnetic field application layer that includes a soft magnetic layer and applies a bias magnetic field in the track width direction to the magnetization free layer, and a gap layer that is positioned between the spin valve film and the bias magnetic field application layer, and the side layers have compression stresses at least in the vicinity of the magnetization pinned layer.
Abstract translation: 薄膜磁头包括自旋阀膜，其包括磁化自由层，磁化固定层和设置在无磁化和被钉扎层之间的非磁性间隔层，以及设置在两者的一对侧层 自旋阀膜的边缘在磁道宽度方向上并且至少在磁化自由层和磁化固定层附近。 每个侧层具有偏置磁场施加层，该偏置磁场施加层包括软磁性层，并且在轨道宽度方向上向磁化自由层施加偏置磁场，并且位于自旋阀膜与偏置之间的间隙层 磁场施加层，并且侧层至少在磁化钉扎层附近具有压应力。
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公开(公告)号：US20170256276A1
公开(公告)日：2017-09-07
申请号：US15059383
申请日：2016-03-03
Applicant: TDK Corporation
Inventor： Tetsuya HIRAKI , Minoru OTA , Hisayoshi WATANABE , Kenzo MAKINO , Hideyuki UKITA
CPC classification number: G11B5/3912 , G11B5/112 , G11B5/3163 , G11B5/3909 , G11B5/3951 , G11B5/3977
Abstract: A multi reader head has a plurality of readers that are laminated via a gap layer(s), and each of the readers has a structure in which a current-perpendicular-to-plane (CPP) type of magneto-resistive effect element, where a current flows along the lamination direction, is interposed between a pair of shields that function as an electrode, respectively, from both sides in the lamination direction. The shields that are opposed from each other via the gap layer of the readers that are adjacent in the lamination direction by a distance that is not constant, but include a portion with a greater distance between the shields and another portion with a smaller distance between the shields are included. The portion with a greater distance between the shields is situated at a position away from the center on an air bearing surface opposing to a recording medium in the magneto-resistive effect element.
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公开(公告)号：US20160133276A1
公开(公告)日：2016-05-12
申请号：US14539081
申请日：2014-11-12
Applicant: TDK CORPORATION
Inventor： Hideyuki UKITA , Kenkichi ANAGAWA , Kei HIRATA , Atsushi YAMAGUCHI , Ittetsu KITAJIMA
CPC classification number: G11B5/1278 , G11B5/1276 , G11B5/3116 , G11B5/3143 , G11B5/315
Abstract: The perpendicular magnetic recording head includes a magnetic pole including a first region and a second region, the first region having a first specific resistance and an end surface exposed on an air bearing surface, the second region having a second specific resistance higher than the first specific resistance and being located at a position recessed from the air bearing surface.
Abstract translation: 垂直磁记录头包括具有第一区域和第二区域的磁极，第一区域具有第一电阻率和暴露在空气轴承表面上的端面，第二区域具有高于第一特定区域的第二电阻率 并且位于从空气轴承表面凹陷的位置。
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公开(公告)号：US20170270954A1
公开(公告)日：2017-09-21
申请号：US15074071
申请日：2016-03-18
Applicant: TDK Corporation
Inventor： Tetsuya HIRAKI , Minoru OTA , Hisayoshi WATANABE , Takahiko MACHITA , Hideyuki UKITA
IPC: G11B5/39
CPC classification number: G11B5/3912 , G11B5/39 , G11B5/3906 , G11B5/3932
Abstract: A magnetic head includes a magneto-resistance effect element in the form of a multilayer film, a pair of shields between which the magneto-resistance effect element is interposed in the lamination direction of the layers of the magneto-resistance effect element and each functioning as an electrode, a pair of side shields with one of said side shields on each side of the magneto-resistance effect element in the direction perpendicular to the lamination direction of the magneto-resistance effect element interposed between the pair of shields, the side shields magnetically coupled to either of the pair of shields, and an anisotropy-application layer disposed adjacent to the shield magnetically coupled to the pair of side shields. The pair of shields, the magneto-resistance effect element, and the pair of side shields are exposed on the air bearing surface facing a recording medium. The anisotropy-application layer is not exposed on the air bearing surface and is provided at a position away from the air bearing surface.
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公开(公告)号：US20140177104A1
公开(公告)日：2014-06-26
申请号：US13727341
申请日：2012-12-26
Applicant: TDK CORPORATION
Inventor： Hideyuki UKITA , Kenta HARA , Kenkichi ANAGAWA , Yosuke ANTOKU , Masashi SANO , Shuji OKAME , Masaya KATO
IPC: G11B5/39
CPC classification number: G11B5/1278 , G11B5/235 , G11B5/3116 , G11B5/315
Abstract: A trailing shield is provided on a trailing side of a magnetic pole with a non-magnetic gap layer in between, and an intermediate layer having negative uniaxial magnetocrystalline anisotropy is provided between the non-magnetic gap layer and the trailing shield. The intermediate layer has a magnetic property in which an easy axis of magnetization is provided in an in-plane direction and thus magnetization is likely to occur in that direction, whereas a difficult axis of magnetization is provided in a direction intersecting the in-plane direction and thus magnetization is less likely to occur in that direction. Accordingly, magnetic flux becomes difficult to excessively flow from the magnetic pole into the trailing shield.
Abstract translation: 尾部屏蔽设置在磁极的后侧，其间具有非磁隙层，并且在非磁隙层和后屏蔽之间设置具有负单轴结晶各向异性的中间层。 中间层具有磁特性，其中容易的磁化轴在面内方向上提供，因此可能在该方向上发生磁化，而在与面内方向交叉的方向上提供难度的磁化轴 因此磁化不太可能在该方向上发生。 因此，磁通变得难以从磁极过渡到后挡板。
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