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1. 发明授权

US08248898B2 Thermally-assisted magnetic recording head having main waveguide and sub-waveguides 有权
标题翻译：具有主波导和次波导的热辅助磁记录头
公开(公告)号：US08248898B2
公开(公告)日：2012-08-21
申请号：US12925283
申请日：2010-10-18
申请人： Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
发明人： Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/105 , G11B5/6088 , G11B2005/001 , G11B2005/0021
摘要： A waveguide structure for aligning a light source to a center waveguide (CWG) in a TAMR head is disclosed and includes two alignment waveguides (AWVG) symmetrically formed about a plane that bisects the CWG lengthwise dimension. Each AWVG has a light coupling section formed parallel to a side of the CWG and captures 0.5% to 10% of the light in the CWG. Each AWVG has an outlet that directs light to a photo detector or camera so that light intensity measurements lAWVG1 and lAWVG2 for first and second AWVG, respectively, can be taken at various positions of the light source. Optimum alignment occurs when (lAWVG1+lAWVG2) reaches a maximum value and |lAWVG1−lAWVG2| has a minimum value. AWVG outlets may be at the ABS, or at the side or back end of a slider. Measurement sensitivity is increased by decreasing the width of the AWVG.
摘要翻译：公开了一种用于将光源对准TAMR头中的中心波导（CWG）的波导结构，并且包括关于平分CWG纵向尺寸的平面对称地形成的两个对准波导（AWVG）。每个AWVG具有平行于CWG侧面并且捕获CWG中的0.5％至10％的光的光耦合部分。每个AWVG都有一个出口，可以将光引导到光电检测器或照相机，以便分别在光源的各个位置拍摄第一个和第二个AWVG的光强度测量值lAWVG1和lAWVG2。（lAWVG1 + 1AWVG2）达到最大值时，发生最佳对齐，并且| lAWVG1-1AWVG2 | 具有最小值。 AWVG插座可能位于ABS或滑块的侧面或后端。通过减小AWVG的宽度来提高测量灵敏度。

2. 发明申请

US20120092971A1 Cross-track alignment waveguides and alignment scheme using alignment waveguides 有权
标题翻译：使用对准波导的交叉轨道对准波导和对准方案
公开(公告)号：US20120092971A1
公开(公告)日：2012-04-19
申请号：US12925283
申请日：2010-10-18
申请人： Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
发明人： Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/105 , G11B5/6088 , G11B2005/001 , G11B2005/0021
摘要： A waveguide structure for aligning a light source to a center waveguide (CWG) in a TAMR head is disclosed and includes two alignment waveguides (AWVG) symmetrically formed about a plane that bisects the CWG lengthwise dimension. Each AWVG has a light coupling section formed parallel to a side of the CWG and captures 0.5% to 10% of the light in the CWG. Each AWVG has an outlet that directs light to a photo detector or camera so that light intensity measurements lAWVG1 and lAWVG2 for first and second AWVG, respectively, can be taken at various positions of the light source. Optimum alignment occurs when (lAWVG1+lAWVG2) reaches a maximum value and |lAWVG1−lAWVG2| has a minimum value. AWVG outlets may be at the ABS, or at the side or back end of a slider. Measurement sensitivity is increased by decreasing the width of the AWVG.
摘要翻译：公开了一种用于将光源对准TAMR头中的中心波导（CWG）的波导结构，并且包括关于平分CWG纵向尺寸的平面对称地形成的两个对准波导（AWVG）。每个AWVG具有平行于CWG侧面并且捕获CWG中的0.5％至10％的光的光耦合部分。每个AWVG都有一个出口，可以将光引导到光电检测器或照相机，以便分别在光源的各个位置拍摄第一个和第二个AWVG的光强度测量值lAWVG1和lAWVG2。（lAWVG1 + 1AWVG2）达到最大值时，发生最佳对齐，并且| lAWVG1-1AWVG2 | 具有最小值。 AWVG插座可能位于ABS或滑块的侧面或后端。通过减小AWVG的宽度来提高测量灵敏度。

3. 发明授权

US08238202B2 Directional waveguide coupler for ABS reflected light 有权
标题翻译： ABS反射光的定向波导耦合器
公开(公告)号：US08238202B2
公开(公告)日：2012-08-07
申请号：US12928678
申请日：2010-12-16
申请人： Erhard Schreck , Tobias Maletzky , Xuhui Jin , Yuchen Zhou , Kenichi Takano , Joe Smyth
发明人： Erhard Schreck , Tobias Maletzky , Xuhui Jin , Yuchen Zhou , Kenichi Takano , Joe Smyth
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , B82Y20/00 , G02B6/1226 , G02B6/125 , G02B6/2821 , G11B5/3189 , G11B2005/001 , G11B2005/0021
摘要： A waveguide structure for a TAMR head is disclosed wherein at least one detection waveguide is formed parallel to a main waveguide and located a gap distance therefrom. A light source transmits light into the main waveguide and towards an ABS/medium interface. A plasmon generator converts light from the waveguide into plasmon waves that are directed onto a magnetic medium. Back reflected light is captured by the main waveguide, partially diverted into a detection waveguide, and transmitted to a photo detector that measures light intensity (IB) which correlates closely to the plasmon wave intensity at the ABS/medium interface. A controller linked to the photo detector is employed to calculate IB as a function of ABS/medium spacing in a non-write condition and this relationship can be used to control and maintain a constant plasmon wave intensity at the ABS during a series of TAMR write processes with a plurality of media.
摘要翻译：公开了一种用于TAMR头的波导结构，其中至少一个检测波导与主波导平行地形成并且与其间的间隙距离。光源将光传输到主波导并朝向ABS /介质接口。等离子体激元发生器将来自波导的光转换成被引导到磁介质上的等离子体波。后反射光被主波导捕获，部分转移到检测波导中，并传输到光检测器，该光检测器测量与ABS /介质界面处的等离子体波强度密切相关的光强度（IB）。在非写入条件下，使用与光电检测器相关联的控制器来计算IB作为ABS /介质间隔的函数，并且该关系可用于在一系列TAMR写入期间控制和维持ABS处的恒定等离子体波强度具有多个媒体的过程。

4. 发明授权

US08036069B1 Plasmon shield to shape and reduce optical spot 有权
标题翻译：等离子体屏蔽形状并减少光斑
公开(公告)号：US08036069B1
公开(公告)日：2011-10-11
申请号：US12802096
申请日：2010-05-28
申请人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
发明人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G02B6/107 , G11B2005/0021
摘要： A TAMR head is disclosed with a triangular shaped plasmon antenna covered on two sides with a plasmon layer that generates an edge plasmon mode along a vertex of the two plasmon sides formed opposite a main pole layer. A plasmon shield (PS) is formed along the ABS and opposite the vertex to confine an electric field from the edge plasmon mode within a small radius of the edge plasmon tip thereby reducing the optical spot size on the magnetic medium and enhancing writability. An end of a waveguide used to direct input electromagnetic radiation to the plasmon antenna adjoins a PS side opposite the ABS. In one embodiment, a magnetic shield may be formed along the ABS and adjoins the PS so that a first PS section terminates at the ABS and faces the vertex while a second PS section is formed between the magnetic shield and waveguide end.
摘要翻译：公开了具有三面形等离子体激元的三角形等离子体激元天线，该三角形等离子体激元天线用等离子体膜覆盖，该等离子体膜沿着与主极层相对的两个等离子体激元侧的顶点产生边缘等离子体模式。等离子体屏蔽（PS）沿着ABS形成并与顶点相对，以将边缘等离子体激元模式的电场限制在边缘等离子体激元尖端的小半径内，从而减小磁介质上的光点尺寸并提高可写性。用于将输入电磁辐射引导到等离子体激元天线的波导的一端与ABS相对的PS侧相邻。在一个实施例中，可以沿着ABS形成磁屏蔽并与PS邻接，使得第一PS部分在ABS处终止并面向顶点，而在磁屏蔽和波导端之间形成第二PS部分。

5. 发明授权

US08059496B1 Magnetic core plasmon antenna with recessed plasmon layer 有权
标题翻译：具有凹陷等离子体层的磁芯等离子体天线
公开(公告)号：US08059496B1
公开(公告)日：2011-11-15
申请号：US12804232
申请日：2010-07-16
申请人： Yuchen Zhou , Xuhui Jin , Kenichi Takano , Moris Dovek , Tobias Maletzky , Erhard Schreck , Joe Smyth
发明人： Yuchen Zhou , Xuhui Jin , Kenichi Takano , Moris Dovek , Tobias Maletzky , Erhard Schreck , Joe Smyth
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/1278 , G11B5/3116 , G11B5/6088 , G11B2005/0021
摘要： Various embodiments of a TAMR head having a magnetic core antenna (MCA) with a recessed plasmon layer are disclosed. An end of the plasmon layer is separated from the ABS by a magnetic layer that transmits the plasmon mode from the plasmon layer and transmits magnetic flux from an adjacent main pole layer. Both of the MCA and magnetic layer may have a triangular shape from an ABS view. There may be a non-magnetic separation layer between the MCA magnetic core and the main pole. Furthermore, a magnetic shield may be included with a side at the ABS, a side facing an end of a waveguide that transmits electromagnetic radiation to the MCA, and a side facing an edge of the plasmon layer. The recessed plasmon layer allows an improved overlay of the thermal heating spot on the magnetic field gradient at the magnetic medium that provides better TAMR performance.
摘要翻译：公开了具有带凹陷等离子体层的磁芯天线（MCA）的TAMR磁头的各种实施例。等离子体激元层的一端通过从等离子体激元层传输等离子体模式的磁层与ABS分离，并从相邻的主极层传输磁通量。从ABS观点来看，MCA和磁性层都可以具有三角形形状。在MCA磁芯和主极之间可能存在非磁性分离层。此外，在ABS的一侧可以包括磁屏蔽，面向朝向MCA的电磁辐射的波导的端部的一侧以及面向等离子体层的边缘的一侧。凹入的等离子体膜层允许在磁介质上的磁场梯度上的热加热点的改进的叠加，从而提供更好的TAMR性能。

6. 发明授权

US08295132B2 Plasmon shield to shape and reduce optical spot 有权
标题翻译：等离子体屏蔽形状并减少光斑
公开(公告)号：US08295132B2
公开(公告)日：2012-10-23
申请号：US13200478
申请日：2011-09-23
申请人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
发明人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
IPC分类号： G11B11/00
CPC分类号： G11B5/3146 , G11B5/1278 , G11B5/1871 , G11B5/23 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： A TAMR head is disclosed with a triangular shaped plasmon antenna covered on two sides with a plasmon layer that generates an edge plasmon mode along a vertex of the two plasmon sides formed opposite a main pole layer. A plasmon shield (PS) is formed along the ABS and opposite the vertex to confine an electric field from the edge plasmon mode within a small radius of the edge plasmon tip thereby reducing the optical spot size on the magnetic medium and enhancing writability. An end of a waveguide used to direct input electromagnetic radiation to the plasmon antenna adjoins a PS side opposite the ABS. In one embodiment, a magnetic shield may be formed along the ABS and adjoins the PS so that a first PS section terminates at the ABS and faces the vertex while a second PS section is formed between the magnetic shield and waveguide end.
摘要翻译：公开了具有三面形等离子体激元的三角形等离子体激元天线，该三角形等离子体激元天线用等离子体膜覆盖，该等离子体膜沿着与主极层相对的两个等离子体激元侧的顶点产生边缘等离子体模式。等离子体屏蔽（PS）沿着ABS形成并与顶点相对，以将边缘等离子体激元模式的电场限制在边缘等离子体激元尖端的小半径内，从而减小磁介质上的光点尺寸并提高可写性。用于将输入电磁辐射引导到等离子体激元天线的波导的一端与ABS相对的PS侧相邻。在一个实施例中，可以沿着ABS形成磁屏蔽并与PS邻接，使得第一PS部分在ABS处终止并面向顶点，而在磁屏蔽和波导端之间形成第二PS部分。

7. 发明申请

US20120020194A1 Plasmon shield to shape and reduce optical spot 有权
公开(公告)号：US20120020194A1
公开(公告)日：2012-01-26
申请号：US13200478
申请日：2011-09-23
申请人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
发明人： Xuhui Jin , Yuchen Zhou , Joe Smyth , Tobias Maletzky , Kenichi Takano , Erhard Schreck
IPC分类号： G11B13/04
CPC分类号： G11B5/3146 , G11B5/1278 , G11B5/1871 , G11B5/23 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： A TAMR head is disclosed with a triangular shaped plasmon antenna covered on two sides with a plasmon layer that generates an edge plasmon mode along a vertex of the two plasmon sides formed opposite a main pole layer. A plasmon shield (PS) is formed along the ABS and opposite the vertex to confine an electric field from the edge plasmon mode within a small radius of the edge plasmon tip thereby reducing the optical spot size on the magnetic medium and enhancing writability. An end of a waveguide used to direct input electromagnetic radiation to the plasmon antenna adjoins a PS side opposite the ABS. In one embodiment, a magnetic shield may be formed along the ABS and adjoins the PS so that a first PS section terminates at the ABS and faces the vertex while a second PS section is formed between the magnetic shield and waveguide end.

8. 发明授权

US08179628B2 Magnetic core plasmon antenna with improved coupling efficiency 有权
公开(公告)号：US08179628B2
公开(公告)日：2012-05-15
申请号：US12803874
申请日：2010-07-08
申请人： Yuchen Zhou , Tobias Maletzky , Xuhui Jin , Zhigang Bai , Kenichi Takano , Erhard Schreck
发明人： Yuchen Zhou , Tobias Maletzky , Xuhui Jin , Zhigang Bai , Kenichi Takano , Erhard Schreck
IPC分类号： G11B5/02 , G11B11/00
CPC分类号： G11B5/314 , B82Y20/00 , G02B6/1226 , G11B5/3163 , G11B5/6088 , G11B2005/0021
摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.

9. 发明申请

US20120008229A1 Magnetic core plasmon antenna with improved coupling efficiency 有权
标题翻译：具有改善耦合效率的磁芯等离子体天线
公开(公告)号：US20120008229A1
公开(公告)日：2012-01-12
申请号：US12803874
申请日：2010-07-08
申请人： Yuchen Zhou , Tobias Maletzky , Xuhui Jin , Zhigang Bai , Kenichi Takano , Erhard Schreck
发明人： Yuchen Zhou , Tobias Maletzky , Xuhui Jin , Zhigang Bai , Kenichi Takano , Erhard Schreck
IPC分类号： G11B5/02 , G11B5/127
CPC分类号： G11B5/314 , B82Y20/00 , G02B6/1226 , G11B5/3163 , G11B5/6088 , G11B2005/0021
摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.
摘要翻译： TAMR（热辅助磁记录）写头使用磁芯等离子体天线中的激光产生的等离子体激元的能量来局部加热磁记录介质并降低其矫顽力和磁各向异性。为了使TAMR头能够最有效地运行，磁记录场的最大梯度和值应当在尽可能接近被加热点的磁介质的一个点处。另外，光模式和等离子体激元模式之间的耦合应该是有效的，从而将最大能量传输到介质。本发明通过可变厚度等离子体发生层围绕等离子体激元天线的磁芯来实现这两个目的，其最薄和最短部分在TAMR头的ABS端，并且其最厚和最长部分有效地耦合到光学模式的波导产生等离子体激元。

10. 发明申请

US20120155232A1 Directional waveguide coupler for ABS reflected light 有权
公开(公告)号：US20120155232A1
公开(公告)日：2012-06-21
申请号：US12928678
申请日：2010-12-16
申请人： Erhard Schreck , Tobias Maletzky , Xuhui Jin , Yuchun Zhou , Kenichi Takano , Joe Smyth
发明人： Erhard Schreck , Tobias Maletzky , Xuhui Jin , Yuchun Zhou , Kenichi Takano , Joe Smyth
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , B82Y20/00 , G02B6/1226 , G02B6/125 , G02B6/2821 , G11B5/3189 , G11B2005/001 , G11B2005/0021
摘要： A waveguide structure for a TAMR head is disclosed wherein at least one detection waveguide is formed parallel to a main waveguide and located a gap distance therefrom. A light source transmits light into the main waveguide and towards an ABS/medium interface. A plasmon generator converts light from the waveguide into plasmon waves that are directed onto a magnetic medium. Back reflected light is captured by the main waveguide, partially diverted into a detection waveguide, and transmitted to a photo detector that measures light intensity (IB) which correlates closely to the plasmon wave intensity at the ABS/medium interface. A controller linked to the photo detector is employed to calculate IB as a function of ABS/medium spacing in a non-write condition and this relationship can be used to control and maintain a constant plasmon wave intensity at the ABS during a series of TAMR write processes with a plurality of media.

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