公开(公告)号：US08588040B1

公开(公告)日：2013-11-19

申请号：US13724283

申请日：2012-12-21

Applicant: SAE Magnetics (H.K.) Ltd. ,  TDK Corporation

Inventor： Yasutoshi Fujita ,  Ryuji Fujii ,  Hideki Tanzawa ,  Natsuo Nishijima ,  Tai Boon Lee ,  Jian Hui Huang ,  Huan Chao Liang ,  Koji Shimazawa ,  Kei Hirata ,  Daisuke Miyauchi

IPC: G11B11/00

CPC classification number: G11B5/3173 ,  G11B5/102 ,  G11B5/314 ,  G11B2005/0021

Abstract: A thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium, a read portion, and a write portion including a write element, a waveguide for guiding light generated by the light source module, and a plasmon unit provided around the write portion and the waveguide. A first coat layer with a first thickness which has a first light absorption index is covered on an opposed-to-medium surface of the read portion, and a second coat layer with a second thickness which has a second light absorption index is covered on an opposed-to medium surface of the write portion, wherein the second thickness is larger than the first thickness, and the second light absorption index is smaller than the first light absorption index. The slider can protect the write portion and improve the reading performance of the read portion.

Abstract translation: 热辅助磁头滑动器包括面向磁记录介质的空气轴承表面，读取部分和包括写入元件的写入部分，用于引导由光源模块产生的光的波导和设置在该光学元件周围的等离子体激元单元 写部分和波导。 具有第一光吸收指数的第一厚度的第一涂层被覆盖在读取部分的相对中介表面上，并且具有第二光吸收指数的第二厚度的第二涂层被覆盖在 写入部分的相对中介表面，其中第二厚度大于第一厚度，第二光吸收指数小于第一光吸收指数。 滑块可以保护写入部分并提高读取部分的读取性能。

公开(公告)号：US09190084B1

公开(公告)日：2015-11-17

申请号：US14277374

申请日：2014-05-14

Applicant: TDK Corporation ,  SAE Magnetics (H.K.) Ltd.

Inventor： Kenta Hara ,  Kosuke Tanaka ,  Tetsuya Roppongi ,  Ryuji Fujii ,  Yasutoshi Fujita

IPC: G11B5/60 ,  G11B5/48 ,  G11B5/31

CPC classification number: G11B5/314 ,  G11B5/1278 ,  G11B5/3106 ,  G11B5/3169 ,  G11B5/4866 ,  G11B5/6082 ,  G11B5/6088 ,  G11B2005/0021 ,  Y10T29/49034 ,  Y10T29/4905

Abstract: A thermal assisted magnetic recording head of the present invention has an air bearing surface (ABS) opposite to a magnetic recording medium, a core that can propagate laser light as propagating light, a plasmon generator that includes a generator front end surface facing the ABS, and a main pole that faces the ABS and emits magnetic flux to the magnetic recording medium. The plasmon generator is opposite to a part of the core and extends to the generator front surface, is coupled with a portion of the propagating light that propagates through the core in the surface plasmon mode to generate a surface plasmon, propagates the surface plasmon to the generator front end surface, and generates near-field light (NF light) at the generator front end surface to irradiate the NF light to the magnetic recording medium. The ABS has a protrusion that is closer to the leading side than the generator front end surface in the down track direction, and that protrudes more toward the magnetic recording medium than the generator front end surface upon operation of the thermal assisted magnetic recording head.

Abstract translation: 本发明的热辅助磁记录头具有与磁记录介质相对的空气轴承表面（ABS），可将激光作为传播光传播的芯，包括面向ABS的发生器前端表面的等离子体发生器， 以及面向ABS并且向磁记录介质发射磁通的主极。 等离子体发生器与芯的一部分相对并延伸到发生器前表面，与表面等离子体模式中传播通过芯的传播光的一部分耦合以产生表面等离子体激元，将表面等离子体传播到 在发生器前端面产生近场光（NF光），将NF光照射到磁记录介质上。 ABS具有比沿着导轨方向更靠近发电机前端表面的前侧的突起，并且在热辅助磁记录头的操作时，比在发生器前端表面更向导磁体的突出。

公开(公告)号：US08861318B1

公开(公告)日：2014-10-14

申请号：US14097684

申请日：2013-12-05

Applicant: SAE Magnetics (H.K.) Ltd. ,  TDK Corporation

Inventor： Tai Boon Lee ,  Bing Ma ,  Wei Liang Chen ,  Hong Tao Ma ,  Yasutoshi Fujita ,  Hideki Tanzawa ,  Ryuji Fujii ,  Kei Hirata ,  Makoto Isogai ,  Takeshi Tsutsumi

IPC: G11B11/24

CPC classification number: G11B5/6082 ,  G11B5/102 ,  G11B5/187 ,  G11B5/3106 ,  G11B2005/0021

Abstract: A thermally assisted magnetic write head includes a waveguide having a first end surface included in an air bearing surface; a magnetic pole having a second end surface included in the air bearing surface; a plasmon generator having a third end surface included in the air bearing surface; a first protective film directly covering a part of the second end surface of the magnetic pole at least; and a second protective film directly covering the first end surface of the waveguide and the third end surface of the plasmon generator. The configuration can reduce recording density and improve thermal stability, furthermore increase the producing yield.

Abstract translation: 热辅助磁写头包括具有包括在空气轴承表面中的第一端面的波导; 具有包括在所述空气轴承表面中的第二端面的磁极; 等离子体发生器，其具有包括在所述空气轴承表面中的第三端面; 至少直接覆盖所述磁极的第二端面的一部分的第一保护膜; 以及直接覆盖波导的第一端面和等离子体激元发生器的第三端面的第二保护膜。 该结构可以降低记录密度并提高热稳定性，进一步提高产率。

公开(公告)号：US08811127B1

公开(公告)日：2014-08-19

申请号：US13773708

申请日：2013-02-22

Applicant: TDK Corporation ,  SAE Magnetics (H.K.) Ltd.

Inventor： Kei Hirata ,  Koji Shimazawa ,  Yasutoshi Fujita ,  Ryuji Fujii

IPC: G11B11/00 ,  G11B13/04

CPC classification number: G11B5/3133 ,  G11B5/314 ,  G11B5/607 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A magnetic head includes a reading part, a recording part that is laminated on the reading part in a planer view, a recording part expansion heater, a reading part expansion heater, and a thermal expansion promoting layer that is prepared at a position closer to the reading part than to the recording part and extends to an air bearing surface.

Abstract translation: 磁头包括读取部分，在平面视图中层压在读取部分上的记录部分，记录部分膨胀加热器，读取部分膨胀加热器和热膨胀促进层，其在靠近 读取部分而不是记录部分并延伸到空气轴承表面。

公开(公告)号：US11887638B1

公开(公告)日：2024-01-30

申请号：US17980771

申请日：2022-11-04

Applicant: SAE Magnetics (H.K.) Ltd.

Inventor： Ryo Hosoi ,  Seiichi Takayama ,  Kang Gao ,  Yasuhiro Konakawa ,  Yasutoshi Fujita ,  Ryuji Fujii

IPC: G11B7/127 ,  G11B5/00

CPC classification number: G11B7/127 ,  G11B2005/0021

Abstract: The laser diode includes an electrode pad layer, being connected to an electrode, and an outer surface in which the electrode pad layer is formed. The electrode pad layer includes a solder-bonding pad part and a solder-contact preventing part. The solder-contact preventing part is formed with small wettability material having solder wettability which is smaller than solder wettability of the solder-bonding pad part. The solder-bonding pad part and the solder-contact preventing part are formed so that a pad height, being a height from the outer surface to a surface of the solder-bonding pad part, is larger than a preventing height, being a height from the outer surface to a surface of the solder-contact preventing part.

公开(公告)号：US12027179B1

公开(公告)日：2024-07-02

申请号：US18324695

申请日：2023-05-26

Applicant: SAE MAGNETICS (H.K.) LTD.

Inventor： Seiichi Takayama ,  Ryuji Fujii ,  Yasutoshi Fujita ,  Ka Yip Wong ,  Chi Hung Yuen

IPC: G11B11/105 ,  G11B5/48 ,  G11B13/08 ,  G11B5/00

CPC classification number: G11B13/08 ,  G11B2005/0021

Abstract: A thermally assisted magnetic head includes a slider having a slider substrate and a magnetic head part, and a light source unit having a laser diode and a sub-mount. The magnetic head part includes a medium-opposite surface, a light source-opposite surface, and a slider-front end surface. The sub-mount includes a joined-end surface and a mount-front end surface, the laser diode includes an electrode surface and an LD-front end surface. The light source unit includes a shift joined structure which the laser diode is joined to a shift area of the joined-end surface, and the light source unit is mounted on the slider substrate so that the electrode surface intersects with a laminated surface of the magnetic head part. The shift area is set in a position which is shifted so that the LD-front end surface is away from the slider-front end surface than the mount-front end surface.