Thermally-assisted magnetic recording head having dummy waveguides for light beam alignment
    72.
    发明授权
    Thermally-assisted magnetic recording head having dummy waveguides for light beam alignment 有权
    具有用于光束对准的虚拟波导的热辅助磁记录头

    公开(公告)号:US08358565B2

    公开(公告)日:2013-01-22

    申请号:US12951587

    申请日:2010-11-22

    IPC分类号: G11B11/00

    摘要: A thermally assisted magnetic recording head includes a magnetic recording element part for writing, a main waveguide for assistance for receiving light, and a dummy waveguide component part provided in parallel to the main waveguide. The dummy waveguide component part includes a pair of waveguides having the same shape and dimensions including a first waveguide and a second waveguide that receive light from a back end surface opposite to an air bearing surface and guides the light toward the air bearing surface, and light emitting ends of the first waveguide and the second waveguide facing towards the air bearing surface have no shielding material, and are in a free condition so that the light intensity from the light emitting ends can be measured.

    摘要翻译: 热辅助磁记录头包括用于书写的磁记录元件部分,用于辅助接收光的主波导和与主波导平行设置的虚拟波导部件部分。 虚拟波导组件部分包括具有相同形状和尺寸的一对波导,其包括第一波导和第二波导,该第一波导和第二波导从与空气轴承表面相对的后端表面接收光并将光引向空气轴承表面,并且光 第一波导和第二波导的朝向空气轴承表面的发射端没有屏蔽材料,并且处于自由状态,从而可以测量来自发光端的光强度。

    Thermally-assisted magnetic recording head comprising characteristic clads
    73.
    发明授权
    Thermally-assisted magnetic recording head comprising characteristic clads 有权
    包括特征包层的热辅助磁记录头

    公开(公告)号:US08325568B2

    公开(公告)日:2012-12-04

    申请号:US12848422

    申请日:2010-08-02

    IPC分类号: G11B11/00

    摘要: Provided is a thermally-assisted magnetic recording head with improved light density of near-field light (NF-light) with which a medium is irradiated. The head comprises: a magnetic pole; a waveguide for propagating light for exciting surface plasmon; a surface plasmon generator provided between the magnetic pole and the waveguide, coupled with the light in a surface plasmon mode, and emitting NF-light; and a clad portion provided at least between the waveguide and the surface plasmon generator and comprising a transition region in which a refractive index decreases along a direction from the waveguide toward the magnetic pole. The provision of the clad portion including the transition region enables improvement of the light density of NF-light due to the convergence of surface plasmon excited in the surface plasmon generator to predetermined locations, while avoiding the problem of temperature rise due to reduction of the volume of surface plasmon generator.

    摘要翻译: 提供了一种具有改善的照射介质的近场光(NF光)的光密度的热辅助磁记录头。 磁头包括:磁极; 用于传播激发表面等离子体激元的光的波导; 设置在磁极和波导之间的表面等离子体发生器,与表面等离子体模式的光耦合,并发射NF光; 以及至少在波导管和表面等离子体激元发生器之间设置的包层部分,并且包括其中折射率沿着从波导到磁极的方向减小的过渡区域。 提供包括过渡区域的包层部分能够改善由于表面等离子体发生器中激发的表面等离子激元的会聚而导致的NF光的光密度到预定位置,同时避免了由于体积的减小导致的温度上升的问题 的表面等离子体发生器。

    Thermally assisted head having reflection mirror for propagating light
    74.
    发明授权
    Thermally assisted head having reflection mirror for propagating light 有权
    热辅助头具有用于传播光的反射镜

    公开(公告)号:US08223597B2

    公开(公告)日:2012-07-17

    申请号:US12820290

    申请日:2010-06-22

    IPC分类号: G11B11/00

    摘要: A magnetic head includes a magnetic head slider; and a laser diode that is positioned on a surface of a side opposite to a substrate of the magnetic head slider and that generates laser light; the magnetic head slider including: a core through which the laser light emitted from the laser diode propagates as propagating light; a cladding that covers the core and that has a refractive index that is smaller than that of the core; a near field light generating means that generates near field light from the propagating light on an air bearing surface; and a main pole for recording that is disposed adjacent to the near field light generating means and of which an edge part is positioned on the air bearing surface. The core includes a reflection layer and a seed layer, the reflection layer has a refractive index smaller than that of the core, and has a reflection surface on which laser light emitted from the laser diode reflects so as to enter the core as the propagating light, and the seed layer is positioned on a back surface of the reflection surface of the reflection layer and suppresses plasmon generation on the reflection surface.

    摘要翻译: 磁头包括磁头滑块; 以及激光二极管,其位于与磁头滑块的基板相反的一侧的表面上,并产生激光; 磁头滑块包括:从激光二极管发射的激光通过其传播的传播光; 覆盖芯并且折射率小于芯的折射率的包层; 近场光产生装置,其从空气轴承表面上的传播光产生近场光; 以及与近场光产生装置相邻设置并且边缘部分位于空气支承表面上的用于记录的主极。 芯包括反射层和种子层,反射层的折射率小于芯的折射率,并且具有反射表面,激光二极管发射的激光以其反射的方式进入芯,作为传播光 并且种子层位于反射层的反射面的背面,并抑制反射面上的等离子体发生。

    THERMALLY-ASSISTED MAGNETIC RECORDING HEAD
    75.
    发明申请
    THERMALLY-ASSISTED MAGNETIC RECORDING HEAD 有权
    热辅助磁记录头

    公开(公告)号:US20120127838A1

    公开(公告)日:2012-05-24

    申请号:US12951587

    申请日:2010-11-22

    IPC分类号: G11B11/00

    摘要: A thermally assisted magnetic recording head includes a magnetic recording element part for writing, a main waveguide for assistance for receiving light, and a dummy waveguide component part provided in parallel to the main waveguide. The dummy waveguide component part includes a pair of waveguides having the same shape and dimensions including a first waveguide and a second waveguide that receive light from a back end surface opposite to an air bearing surface and guides the light toward the air bearing surface, and light emitting ends of the first waveguide and the second waveguide facing towards the air bearing surface have no shielding material, and are in a free condition so that the light intensity from the light emitting ends can be measured.

    摘要翻译: 热辅助磁记录头包括用于书写的磁记录元件部分,用于辅助接收光的主波导和与主波导平行设置的虚拟波导部件部分。 虚拟波导组件部分包括具有相同形状和尺寸的一对波导,其包括第一波导和第二波导,该第一波导和第二波导从与空气轴承表面相对的后端表面接收光并将光引向空气轴承表面,并且光 第一波导和第二波导的朝向空气轴承表面的发射端没有屏蔽材料,并且处于自由状态,从而可以测量来自发光端的光强度。

    METHOD FOR MANUFACTURING A THERMALLY-ASSISTED MAGNETIC HEAD
    76.
    发明申请
    METHOD FOR MANUFACTURING A THERMALLY-ASSISTED MAGNETIC HEAD 有权
    制造热辅助磁头的方法

    公开(公告)号:US20120117791A1

    公开(公告)日:2012-05-17

    申请号:US12947091

    申请日:2010-11-16

    IPC分类号: G11B5/127

    摘要: In a method for manufacturing a thermally-assisted magnetic head that includes a slider and an LD unit, the slider including an air bearing surface (ABS) that faces a recording medium and including a waveguide with a core for light propagation that extends from a light entering surface, which is different from the ABS, to the ABS, the LD unit being attached to the light entering surface of the slider, and the thermally-assisted magnetic head performing magnetic recording while heating the recording medium with near-field light that is excited from linearly polarized laser light, the LD unit is disposed in a position facing the light entering surface of the slider, a photo detector is disposed in a position facing the ABS of the slider, and a polarizer transmitting only light having a polarization component that is orthogonal to a polarization direction of the linearly polarized laser light is disposed between the ABS and the photo detector. An LD of the LD unit is activated, and the linearly polarized laser light is enabled to enter into the core from the light entering surface of the slider. Light radiated from the ABS is enabled to enter into the polarizer, and an alignment of the slider and the LD unit is performed while the photo detector detects light that is transmitted through the polarizer.

    摘要翻译: 在制造包括滑块和LD单元的热辅助磁头的方法中,滑块包括面向记录介质的空气轴承表面(ABS),该空气轴承表面包括具有从光线延伸的光传播用核心的波导 进入与ABS不同的表面,将LD单元附着到滑块的光进入表面,并且热辅助磁头在用近场光加热记录介质的同时进行磁记录 从线偏振激光激发,LD单元被设置在面向滑块的光进入表面的位置,光电检测器设置在面向滑块的ABS的位置,偏振器仅透射具有偏振分量的光, 与线偏振激光的偏振方向垂直的方式设置在ABS和光电检测器之间。 LD单元的LD被激活,并且线偏振激光能够从滑块的光进入表面进入芯中。 从ABS辐射的光能够进入偏振器,并且当光电检测器检测到透射通过偏振器的光时,执行滑块和LD单元的对准。

    Thermally-assisted magnetic recording head comprising plasmon generator
    77.
    发明授权
    Thermally-assisted magnetic recording head comprising plasmon generator 有权
    包括等离子体发生器的热辅助磁记录头

    公开(公告)号:US08169861B1

    公开(公告)日:2012-05-01

    申请号:US12946103

    申请日:2010-11-15

    IPC分类号: G11B11/00

    摘要: Provided is a thermally-assisted magnetic recording head in which NF-light with sufficiently high light density can be applied to a medium while a write-field generating point and a near-field light (NF-light) generating point are close to each other. The head comprises a plasmon generator provided between a magnetic pole and a waveguide and configured to be coupled with light propagating through the waveguide in a surface plasmon mode to emit NF-light. The plasmon generator comprises: a plasmon propagating part comprising a propagation edge for propagating surface plasmon excited by the light; and a light penetration suppressing part with an extinction coefficient greater than the plasmon propagating part. The light penetration suppressing part is in surface-contact with a surface portion of the plasmon propagating part excluding the propagation edge, and the magnetic pole is in surface-contact with the light penetration suppressing part. This configuration can avoid significant reduction in light use efficiency of an optical system generating NF-light due to partial absorption of electromagnetic field (light) into the magnetic pole.

    摘要翻译: 本发明提供一种热辅助磁记录头,其中写入场产生点和近场光(NF-光)产生点彼此靠近的情况下,能够将具有足够高的光密度的NF光施加到介质上 。 头部包括设置在磁极和波导之间的等离子体激元发生器,其被配置为以表面等离子体模式传播通过波导的光耦合,以发射NF光。 等离子体发生器包括:等离子体激元传播部分,包括用于传播由光激发的表面等离子体激元的传播边缘; 以及具有大于等离子体激元传播部分的消光系数的光穿透抑制部分。 透光抑制部与除了传播边缘之外的等离子体激元传播部分的表面部分表面接触,并且磁极与透光抑制部分表面接触。 该结构可以避免由于电磁场(光)向磁极的部分吸收而产生NF光的光学系统的光使用效率的显着降低。

    Thermally-Assisted Magnetic Recording Head With Plane-Emission Type Light Source
    79.
    发明申请
    Thermally-Assisted Magnetic Recording Head With Plane-Emission Type Light Source 有权
    具有平面发射型光源的热辅助磁记录头

    公开(公告)号:US20110090587A1

    公开(公告)日:2011-04-21

    申请号:US12581385

    申请日:2009-10-19

    IPC分类号: G11B5/02

    摘要: A thermally-assisted magnetic recording head includes a surface-emitting type light source for emitting substantially collimated beam, a first diffraction optical element for focusing the substantially collimated beam emitted from the surface-emitting type light source, a second diffraction optical element for collimating the light beam focused by the first diffraction optical element, a waveguide integrally formed with the second diffraction optical element and made of the material as that of second diffraction optical element, the light beam collimated by the second diffraction optical element being incident to the waveguide, an optical-path direction conversion element for converting a direction of an optical path of the incident light beam to a propagation direction of the waveguide, the propagation direction being toward an opposed-to-medium surface, and a magnetic pole for generating write field from its end face on the opposed-to-medium surface side.

    摘要翻译: 热辅助磁记录头包括用于发射基本上准直的光束的表面发射型光源,用于聚焦从表面发射型光源发射的基本上准直的光束的第一衍射光学元件,用于准直 由第一衍射光学元件聚焦的光束,与第二衍射光学元件整体形成并由第二衍射光学元件的材料制成的波导,由第二衍射光学元件准直的光束入射到波导, 光路方向转换元件,用于将入射光束的光路的方向转换为波导的传播方向,传播方向朝向相对中间的表面;以及磁极,用于从其产生写入场 在相对中的表面侧上的端面。

    Thermally-assisted magnetic recording head with light detector in element-integration surface
    80.
    发明授权
    Thermally-assisted magnetic recording head with light detector in element-integration surface 有权
    热辅助磁记录头,带元件整合表面的光检测器

    公开(公告)号:US08441895B2

    公开(公告)日:2013-05-14

    申请号:US12622962

    申请日:2009-11-20

    IPC分类号: G11B11/00

    摘要: A thermally-assisted magnetic recording head is provided, in which the light-source output can be adjusted according to its variation by environmental influences and over time. The head comprises: a light source; a write head element provided in a element-integration surface; an optical system provided in the element-integration surface and configured to guide a light emitted from the light source to the vicinity of one end of the write head element; and a light detector for monitoring the light-source output, provided in the element-integration surface and comprising a light-receiving surface covering an area directly above at least a portion of the optical system. This light detector with such a light-receiving surface can detect a leakage light emitted from the optical system as a monitoring light. Therefore, feedback adjustment of the light-source output can be realized to stabilize the intensity of light for thermal-assist applied to a magnetic recording medium.

    摘要翻译: 提供了一种热辅助磁记录头,其中可以根据环境影响和随时间的变化来调节光源输出。 头包括:光源; 设置在元件集成表面中的写入头元件; 光学系统,设置在所述元件一体化表面中并且被配置为将从所述光源发射的光引导到所述写入头元件的一端附近; 以及光检测器,用于监测元件整合表面中的光源输出,并包括覆盖光学系统的至少一部分正上方的区域的光接收表面。 具有这种光接收表面的光检测器可以检测从光学系统发射的泄漏光作为监测光。 因此,可以实现光源输出的反馈调整,以稳定施加到磁记录介质的热辅助的光的强度。