公开(公告)号：US10297277B1

公开(公告)日：2019-05-21

申请号：US16123225

申请日：2018-09-06

申请人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Shigeki Tanemura ,  Atsushi Yamaguchi ,  Kei Hirata

发明人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Shigeki Tanemura ,  Atsushi Yamaguchi ,  Kei Hirata

IPC分类号： G11B5/127 ,  G11B5/31

摘要： A magnetic head includes a coil, and a magnetic path forming section for defining a first space for a portion of the coil to pass through. The magnetic path forming section includes a core section. The coil includes a first winding portion and a second winding portion connected in series. The first winding portion includes one or two first coil elements extending to pass through the first space, and extends once or twice around the entire perimeter of the core section. The second winding portion does not pass through the first space, and extends less than once around the entire perimeter of the core section to rotate n degrees about a center point of the core section, where n is greater than 270 and smaller than 360.

公开(公告)号：US08559133B2

公开(公告)日：2013-10-15

申请号：US12457089

申请日：2009-06-01

申请人： Kei Hirata ,  Takeo Kagami ,  Tatsuhiro Nojima ,  Hisayoshi Watanabe ,  Michitaka Nishiyama

发明人： Kei Hirata ,  Takeo Kagami ,  Tatsuhiro Nojima ,  Hisayoshi Watanabe ,  Michitaka Nishiyama

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/315

摘要： A perpendicular magnetic write head includes: a magnetic pole having an end face on an air bearing surface; and side shield layers each having an end face on the air bearing surface, and arranged on both sides, in a write track width direction, of the magnetic pole with a side gap in between. The end face of the magnetic pole has a geometry in which a width at a trailing edge is larger than a width at a leading edge. Relationship D1

摘要翻译： 垂直磁写头包括：磁极，其在空气轴承表面上具有端面; 以及侧面屏蔽层，其各自具有位于空气轴承表面上的端面，并且布置在磁极的写入磁道宽度方向的两侧，其间具有侧面间隙。 磁极的端面具有几何形状，其中后缘处的宽度大于前缘处的宽度。 在空气轴承表面中满足关系D1 = D2，其中D1是后缘处的侧间隙的间隙长度，D2是前缘处的侧间隙的间隙长度 D3是在后缘和前缘之间的任何位置处的侧间隙的间隙长度。

公开(公告)号：US08462594B1

公开(公告)日：2013-06-11

申请号：US13405893

申请日：2012-02-27

申请人： Susumu Aoki ,  Kosuke Tanaka ,  Tetsuya Roppongi ,  Kei Hirata ,  Takeshi Tsutsumi

发明人： Susumu Aoki ,  Kosuke Tanaka ,  Tetsuya Roppongi ,  Kei Hirata ,  Takeshi Tsutsumi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted magnetic recording head includes a medium facing surface, a magnetic pole, a waveguide including a core and a cladding, and a plasmon generator. The magnetic pole is located forward of the core in the direction of travel of a magnetic recording medium. The plasmon generator is disposed between the core and the magnetic pole. The core has an evanescent light generating surface facing toward the plasmon generator. The plasmon generator has a front end face located in the medium facing surface, a flat surface facing toward the'evanescent light generating surface, and first and second side surfaces that are at a distance from each other and are located farther from the evanescent light generating surface than is the flat surface.

摘要翻译： 一种热辅助磁记录头包括面向介质的表面，磁极，包括芯和包层的波导，以及等离子体激元发生器。 磁极位于磁芯的前方，位于磁记录介质的行进方向。 等离子体发生器设置在芯和磁极之间。 核心具有面向等离子体发生器的ev逝光产生表面。 等离子体激元发生器具有位于介质面向表面中的前端面，面向朝向光生成表面的平坦表面，以及彼此相距一定距离并且远离产生ev逝光的第一和第二侧表面 表面比平坦的表面。

公开(公告)号：US08325570B1

公开(公告)日：2012-12-04

申请号：US13363795

申请日：2012-02-01

申请人： Kosuke Tanaka ,  Tetsuya Roppongi ,  Kei Hirata ,  Susumu Aoki ,  Takahiko Izawa ,  Makoto Isogai ,  Keita Kawamori ,  Takeshi Tsutsumi

发明人： Kosuke Tanaka ,  Tetsuya Roppongi ,  Kei Hirata ,  Susumu Aoki ,  Takahiko Izawa ,  Makoto Isogai ,  Keita Kawamori ,  Takeshi Tsutsumi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted magnetic recording head includes: a medium facing surface; a magnetic pole; a waveguide including a core and a cladding; a plasmon generator; and a protruding member. The protruding member is disposed between the medium facing surface and a front end face of the core facing toward the medium facing surface. The protruding member has a first end face located in the medium facing surface, and a second end face facing toward the front end face of the core and receiving light having propagated through the core and passed through the front end face. The protruding member is formed of a metal different from both a material forming the magnetic pole and a material forming the plasmon generator. The protruding member is heated and expanded by the light received at the second end face, so that the first end face gets protruded toward a magnetic recording medium.

摘要翻译： 一种热辅助磁记录头包括：面向介质的表面; 磁极 包括芯和包层的波导; 等离子体发生器; 和突出部件。 突出构件设置在面向介质的表面和芯的前端面之间，面向面向介质的表面。 突出构件具有位于介质相对表面中的第一端面和面向芯的前端面的第二端面，并且接收已经穿过芯并且穿过前端面的光。 突出部件由不同于形成磁极的材料和形成等离子体激元发生器的材料形成。 突出部件被第二端面所接收的光线加热膨胀，使得第一端面朝向磁记录介质突出。

公开(公告)号：US08233237B2

公开(公告)日：2012-07-31

申请号：US12819552

申请日：2010-06-21

申请人： Kenkichi Anagawa ,  Katsuki Kurihara ,  Takeo Kagami ,  Kei Hirata ,  Minoru Ota

发明人： Kenkichi Anagawa ,  Katsuki Kurihara ,  Takeo Kagami ,  Kei Hirata ,  Minoru Ota

IPC分类号： G11B5/31

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/315

摘要： A main magnetic-pole layer is provided with, at the tip end portion thereof, a trailing shied on the trailing side via a non-magnetic gap layer, and the non-magnetic gap layer includes therein one or more magnetic layers. This magnetic layer appropriately controls the amount of magnetic fluxes coming from the tip end portion of the main magnetic-pole layer for capturing into the trailing shield because the magnetic fluxes coming from the tip end portion of the main magnetic-pole layer go through the magnetic layer before being captured into the trailing shield.

摘要翻译： 主磁极层在其末端部分经由非磁隙层在后侧设置有尾部，非磁性间隙层包括一个或多个磁性层。 该磁性层适当地控制来自主磁极层的前端部分的磁通量，用于捕获到后屏蔽件中，因为来自主磁极层的末端部分的磁通量通过磁 在被捕获到后盾之前。

公开(公告)号：US07948713B2

公开(公告)日：2011-05-24

申请号：US11622697

申请日：2007-01-12

申请人： Naoki Ohta ,  Kei Hirata

发明人： Naoki Ohta ,  Kei Hirata

IPC分类号： G11B5/60 ,  G11B21/24

CPC分类号： G11B5/3136 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3173 ,  G11B5/6047 ,  G11B5/6082 ,  G11B2005/3996

摘要： A magnetic head slider includes at least one thin-film magnetic head formed on a trailing surface of the magnetic head slider, and an ABS to be faced a magnetic disk in operation. At least a part of the ABS is made of a giant magnetostrictive material.

摘要翻译： 磁头滑动器包括形成在磁头滑块的后表面上的至少一个薄膜磁头和操作中面向磁盘的ABS。 ABS的至少一部分由巨磁致伸缩材料制成。

公开(公告)号：US07715156B2

公开(公告)日：2010-05-11

申请号：US11622603

申请日：2007-01-12

申请人： Kei Hirata ,  Satoshi Miura

发明人： Kei Hirata ,  Satoshi Miura

IPC分类号： G11B5/39 ,  G11B5/127

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3906 ,  G11B5/3993 ,  H01F10/3272 ,  H01F41/307 ,  H01L43/10 ,  Y10T428/1114

摘要： A TMR element includes a lower electrode layer, a TMR multi-layer stacked on the lower electrode layer, and an upper electrode layer stacked on the TMR multi-layer. The TMR multi-layer includes a tunnel barrier layer having a three-layered structure of a first crystalline layer, a crystalline semiconductor layer and a second crystalline insulation layer stacked in this order.

摘要翻译： TMR元件包括下电极层，层叠在下电极层上的TMR多层和层叠在TMR多层上的上电极层。 TMR多层包括具有第一结晶层，结晶半导体层和第二晶体绝缘层的三层结构的隧道势垒层，该层结构按此顺序堆叠。

公开(公告)号：US20090323222A1

公开(公告)日：2009-12-31

申请号：US12216162

申请日：2008-06-30

申请人： Kei Hirata ,  Kazuki Sato ,  Yohei Koyanagi ,  Takayasu Kanaya ,  Takeo Kagami

发明人： Kei Hirata ,  Kazuki Sato ,  Yohei Koyanagi ,  Takayasu Kanaya ,  Takeo Kagami

IPC分类号： G11B5/48 ,  G11B5/33

CPC分类号： G11B5/398 ,  G11B5/3166 ,  G11B5/3169 ,  G11B5/3173 ,  G11B5/3932

摘要： In manufacturing the thin film magnetic head, the rear end face of the MR element and the rear end face of a resistive film pattern are determined with high precision using a mask pattern, in which a first opening and a second opening are collectively formed. The first and second openings are located side by side in a track-width direction. The first opening includes a first edge extending across the MR film in the track-width direction, and the second opening includes a second edge located at a given interval, as measured in a direction orthogonal to the track-width direction, from the first edge, and extending in the track-width direction. In the step of polishing for forming a magnetic-recording-medium-facing-surface, the amount of polishing is determined by monitoring the resistance change of the resistive film pattern, thereby reducing the dimension errors in the MR height when manufacturing the MR element.

摘要翻译： 在制造薄膜磁头时，使用其中共同形成第一开口和第二开口的掩模图案，以高精度确定MR元件的后端面和电阻膜图案的后端面。 第一和第二开口沿着轨道宽度方向并排设置。 第一开口包括在轨道宽度方向上跨过MR膜延伸的第一边缘，并且第二开口包括位于沿与轨道宽度方向正交的方向上测量的给定间隔的第二边缘，从第一边缘 并沿轨道宽度方向延伸。 在用于形成面向磁记录介质的表面的抛光步骤中，通过监视电阻膜图案的电阻变化来确定抛光量，从而在制造MR元件时减小MR高度的尺寸误差。

公开(公告)号：US07632895B2

公开(公告)日：2009-12-15

申请号：US10546892

申请日：2004-02-17

申请人： Kei Hirata ,  Koji Kitayama ,  Mizuho Maeda

发明人： Kei Hirata ,  Koji Kitayama ,  Mizuho Maeda

IPC分类号： C08C19/06

CPC分类号： C08G59/027 ,  C08G59/36 ,  C08L63/08 ,  G03F7/038

摘要： A curable resin composition includes (A) a cationically polymerizable-compound, (B) a cationic photopolymerization initiator, and (C) an epoxidized polyisoprene containing an epoxy group at 0.15 to 2.5 meq/g in the molecule and having a number-average molecular weight of 15000 to 200000. The curable resin composition shows excellent elongation properties and high break elongation even in a cured state and can give a cured product having superior compatibility, transparency, flexibility and waterproofness. Accordingly, the composition is suitable for use as adhesives, coating agents, encapsulating materials, inks, sealing materials and the like.

摘要翻译： 固化性树脂组合物包含（A）阳离子聚合性化合物，（B）阳离子性光聚合引发剂，（C）分子中含有0.15〜2.5meq / g的环氧基的环氧化聚异戊二烯，数均分子量 固化性树脂组合物即使在固化状态下也显示优异的伸长性能和高断裂伸长率，并且可以得到具有优异的相容性，透明性，柔软性和防水性的固化产物。 因此，该组合物适合用作粘合剂，包衣剂，包封材料，油墨，密封材料等。

公开(公告)号：US20080291582A1

公开(公告)日：2008-11-27

申请号：US11802219

申请日：2007-05-21

申请人： Kei Hirata ,  Norikazu Ota ,  Yuichi Watabe ,  Tetsuro Sasaki ,  Takeo Kagami ,  Tetsuya Roppongi ,  Kazuki Sato ,  Yuji Otsubo ,  Sohei Horiuchi ,  Yoshiaki Tanaka ,  Kenji Yokoyama ,  Noriaki Kasahara

发明人： Kei Hirata ,  Norikazu Ota ,  Yuichi Watabe ,  Tetsuro Sasaki ,  Takeo Kagami ,  Tetsuya Roppongi ,  Kazuki Sato ,  Yuji Otsubo ,  Sohei Horiuchi ,  Yoshiaki Tanaka ,  Kenji Yokoyama ,  Noriaki Kasahara

IPC分类号： G11B5/10

CPC分类号： G11B5/3146 ,  G11B5/11 ,  G11B5/3912 ,  G11B5/3967 ,  G11B5/6064

摘要： Provided is a thin film magnetic head capable of suppressing an occurrence of a track erase, decreasing an influence on a magnetoresistive element caused by a magnetic flux generated from a thin film coil, and further decreasing the parasitic capacity. The thin film magnetic head has, in order in a stacked direction, a first magnetic shield layer, a magnetoresistive element, a second magnetic shield layer, a third magnetic shield layer, a main magnetic pole layer and a return yoke layer. A width in a track width direction of at least one of the first and the second magnetic shield layers is smaller than widths in a track width direction of the third magnetic shield layer and the return yoke layer.

摘要翻译： 提供一种薄膜磁头，其能够抑制磁道擦除的发生，减少由由薄膜线圈产生的磁通引起的对磁阻元件的影响，并进一步降低寄生电容。 薄膜磁头沿堆叠方向依次具有第一磁屏蔽层，磁阻元件，第二磁屏蔽层，第三磁屏蔽层，主磁极层和返回磁轭层。 第一和第二磁屏蔽层中的至少一个的轨道宽度方向上的宽度小于第三磁屏蔽层和返回磁轭层的磁道宽度方向上的宽度。