公开(公告)号：US11385303B2

公开(公告)日：2022-07-12

申请号：US17167581

申请日：2021-02-04

Applicant: TDK CORPORATION

Inventor： Kenzo Makino ,  Takafumi Kobayashi ,  Hiroshi Yamazaki

IPC: G01R33/09 ,  G01R33/025

Abstract: A magnetic sensor device includes a conductor that constitutes a coil, and a detection circuit including a plurality of MR elements. The coil includes an upper coil portion. The upper coil portion includes a first conductor portion and a second conductor portion. An average cross-sectional area of the upper coil portion in the first conductor portion of the upper coil portion is smaller than that of the upper coil portion in the second conductor portion. The first conductor portion is located at a position where a first partial magnetic field occurring from the first conductor portion is applied to an MR element.

公开(公告)号：US09818436B2

公开(公告)日：2017-11-14

申请号：US15084956

申请日：2016-03-30

Applicant: TDK Corporation

Inventor： Koji Shimazawa ,  Shuji Okame ,  Yoshihiro Tsuchiya ,  Takafumi Kobayashi

IPC: G11B5/127 ,  G11B5/39 ,  G11B5/48 ,  G11B5/31 ,  G11B5/187 ,  G11B5/00 ,  G11B5/012 ,  G11B5/60

CPC classification number: G11B5/314 ,  G11B5/012 ,  G11B5/127 ,  G11B5/187 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A thermal assisted magnetic recording head that performs magnetic recording while locally heating a magnetic recording medium includes: a plasmon generator that generates a surface plasmon and that generates near-field light from the surface plasmon on a front end surface positioned on an air bearing surface opposing the magnetic recording medium; a dielectric body layer positioned around the plasmon generator; and an adhesion layer positioned between the plasmon generator and the dielectric body layer. The adhesion layer is made from at least one of IrOx, RuOx, NiOx and CoOx.

公开(公告)号：US09165581B2

公开(公告)日：2015-10-20

申请号：US14204064

申请日：2014-03-11

Applicant: TDK Corporation

Inventor： Susumu Aoki ,  Takafumi Kobayashi ,  Kei Hirata ,  Eiji Komura ,  Tsutomu Chou

IPC: G11B5/187 ,  G11B5/31 ,  G11B5/48 ,  G11B5/60 ,  G11B5/11 ,  G11B5/127 ,  G11B5/00

CPC classification number: G11B5/1278 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021 ,  G11B2005/0024

Abstract: A thermally assisted magnetic recording head has a generator end surface facing an air bearing surface (ABS), and includes: a near-field light (NF light) generator that generates an NF light on the generator end surface and irradiates a magnetic recording medium with the NF light, and a main magnetic pole end surface positioned in the vicinity of the generator end surface; a main magnetic pole that emits a magnetic flux from the main magnetic pole end surface to the magnetic recording medium and a shield end surface positioned in the vicinity of the generator end surface; and a return shield that is magnetically linked to the main magnetic pole, and that absorbs the magnetic flux returning from the magnetic recording medium at the shield end surface. The main magnetic pole and the return shield are positioned to be on the same side with respect to the NF light generator in the down track direction, and the NF light generator does not overlap with the main magnetic pole either in the down track direction or in the cross track direction.

Abstract translation: 一种热辅助磁记录头具有面向空气轴承表面（ABS）的发生器端面，并且包括：近场光（NF光）发生器，其在发生器端面上产生NF光并照射磁记录介质 NF灯和位于发电机端面附近的主磁极端面; 从主磁极端面向磁记录介质发出磁通的主磁极和位于发电机端面附近的屏蔽端面; 以及与主磁极磁连接并且在屏蔽端面处吸收从磁记录介质返回的磁通的返回屏蔽。 主磁极和返回屏蔽体相对于NF光发生器沿向下方向位于同一侧，并且NF光发生器在主导方向上或与主磁极不重叠 十字轨道方向。

公开(公告)号：US09165569B1

公开(公告)日：2015-10-20

申请号：US14276409

申请日：2014-05-13

Applicant: TDK CORPORATION

Inventor： Takafumi Kobayashi ,  Susumu Aoki ,  Kosuke Tanaka ,  Tsutomu Chou ,  Koji Shimazawa

IPC: G11B5/02 ,  G11B5/127 ,  G11B5/21 ,  G11B5/39 ,  G11B5/235 ,  G11B5/48 ,  G11B5/60 ,  G11B5/00

CPC classification number: G11B5/235 ,  G02B6/00 ,  G02B6/122 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/0021

Abstract: Thermally-assisted magnetic recording head, includes: a magnetic pole having an end exposed on an air-bearing surface; a waveguide; a plasmon generator having a first and second region, first region extending backward from the air-bearing surface to a first position, second region being coupled with the first region at the first position, extending backward from first position, and having a width in a track-width direction, and width in the track-width direction of second region being larger than a width in the track-width direction of first region; an adhesion layer having an end exposed on the air-bearing surface and a first adhesion region, the first adhesion region being in close contact with an end face in the track-width direction of first region; and a cladding layer located around plasmon generator and adhesion layer. Adhesion force between adhesion layer and plasmon generator is greater than adhesion force between cladding layer and plasmon generator.

Abstract translation: 热辅助磁记录头包括：具有暴露在空气轴承表面上的端部的磁极; 波导; 具有第一和第二区域的等离子体发生器，从空气轴承表面向后延伸到第一位置的第一区域，第二区域与第一位置处的第一区域耦合，从第一位置向后延伸，并且具有 轨道宽度方向和第二区域的轨道宽度方向上的宽度大于第一区域的轨道宽度方向上的宽度; 具有暴露在空气轴承表面上的端部和第一粘附区域的粘合层，所述第一粘合区域与第一区域的轨道宽度方向上的端面紧密接触; 以及位于等离子体发生器和粘附层周围的包覆层。 粘附层和等离子体发生器之间的粘附力大于包层和等离子体发生器之间的粘附力。