公开(公告)号：US20140269233A1

公开(公告)日：2014-09-18

申请号：US13830910

申请日：2013-03-14

Applicant: TDK Corporation

Inventor： Shinji HARA ,  Tsutomu CHOU ,  Koji SHIMAZAWA ,  Eiji KOMURA ,  Seiichi TAKAYAMA ,  Yasuhiro ITO

IPC: G11B13/04

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

Abstract: A thermally assisted magnetic recording head includes core that propagates laser light as propagation light, a near-field light generator that faces a portion of the core and extends to an air bearing surface (ABS), the near-field light generator coupled to the propagation light propagating through the core so as to generate a surface plasmon, propagating the surface plasmon to an end part facing the ABS, and generating near-field light at the end part to irradiate the near-field light to a magnetic recording medium, a main magnetic pole layer provided in the vicinity of the near-field light generator where an end part is positioned on the ABS, a laser diode that generates laser light of wavelength 890 nm to 1,000 nm and enters the laser light into the core, and a photodiode provided on a silicon substrate measures an intensity of the laser light entering from the laser diode to the core.

Abstract translation: 热辅助磁记录头包括将激光作为传播光传播的芯，近场光发生器，其面对芯的一部分并延伸到空气轴承表面（ABS），近场光发生器耦合到传播 光传播通过芯，以产生表面等离子体，将表面等离子体传播到面向ABS的端部，并在端部产生近场光，以将近场光照射到磁记录介质，主 设置在近场光发生器附近的磁极层，端部位于ABS上;激光二极管，其生成波长为890nm至1000nm的激光并将激光进入芯中;以及光电二极管 设置在硅衬底上测量从激光二极管进入芯的激光的强度。

公开(公告)号：US20150262595A1

公开(公告)日：2015-09-17

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: G11B5/48 ,  G11B5/11 ,  G11B5/60

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：US20170278530A1

公开(公告)日：2017-09-28

申请号：US15080964

申请日：2016-03-25

Applicant: TDK Corporation

Inventor： Koji SHIMAZAWA ,  Tsutomu CHOU ,  Yoshihiro TSUCHIYA ,  Kosuke TANAKA

IPC: G11B5/48

CPC classification number: G11B5/4866 ,  G11B5/012 ,  G11B5/127 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A plasmon generator generates surface plasmon and generates near-field light from the surface plasmon at a distal end surface situated on an air bearing surface facing a magnetic recording medium. The plasmon generator has a first portion including the distal end surface, a second portion situated away from the air bearing surface, and a separating layer situated between the first portion and the second portion and separating the first portion from the second portion.

公开(公告)号：US20140254333A1

公开(公告)日：2014-09-11

申请号：US13791008

申请日：2013-03-08

Applicant: TDK CORPORATION

Inventor： Eiji KOMURA ,  Tsutomu CHOU ,  Koji SHIMAZAWA

IPC: H01P3/16 ,  G11B13/04

CPC classification number: H01P3/16 ,  G02B6/105 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021 ,  H01P1/165 ,  H01P3/122

Abstract: A polarization converter of the invention includes a core part that wave-guides an electromagnetic wave and a cladding part that is provided around the core part. The core part includes a conversion part converting a polarization state of the electromagnetic wave. A cross-sectional shape of the conversion part in a plane orthogonal to a propagation direction of the electromagnetic wave is a shape formed by cutting off a portion of a rectangular or square shape along a jagged diagonal line.

Abstract translation: 本发明的偏振转换器包括：引导电磁波的芯部和设置在芯部周围的包层部。 核心部分包括转换电磁波的偏振状态的转换部分。 与电磁波的传播方向垂直的平面中的转换部的截面形状是沿着锯齿状的对角线切断矩形或正方形的一部分而形成的形状。