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11.发明申请公开(公告)号：US20170263282A1
公开(公告)日：2017-09-14
申请号：US15608349
申请日：2017-05-30
Applicant: Seagate Technology LLC
Inventor： John Charles Duda , Ruoxi Yang , James Gary Wessel
CPC classification number: G11B11/10547 , G11B5/314 , G11B5/4866 , G11B5/6052 , G11B5/607 , G11B5/6082 , G11B5/6088 , G11B11/06 , G11B11/10532 , G11B11/10543 , G11B11/12 , G11B11/14 , G11B2005/0021
Abstract: An apparatus comprises a slider having an air-bearing surface (ABS), a write pole at or near the ABS, and a reader at or near the ABS and connected to a pair of reader bond pads of the slider. A near-field transducer (NFT) is formed on the slider at or near the ABS, and an optical waveguide is formed in the slider and configured to receive light from a laser source. A sensor is situated proximal of the write pole at a location within the slider that receives at least some of the light communicated along the waveguide. The sensor may be electrically coupled to the reader bond pads in parallel with the reader, and configured to generate a signal indicative of output optical power of the laser source.
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12.发明申请BOLOMETER FOR INTERNAL LASER POWER MONITORING IN HEAT-ASSISTED MAGNETIC RECORDING DEVICE 审中-公开用于热辅助磁记录装置内部激光功率监测的测量仪公开(公告)号：US20160284372A1
公开(公告)日：2016-09-29
申请号：US15051053
申请日：2016-02-23
Applicant: Seagate Technology LLC
Inventor： John Charles Duda , Ruoxi Yang , James Gary Wessel
CPC classification number: G11B11/10547 , G11B5/314 , G11B5/4866 , G11B5/6052 , G11B5/607 , G11B5/6082 , G11B5/6088 , G11B11/06 , G11B11/10532 , G11B11/10543 , G11B11/12 , G11B11/14 , G11B2005/0021
Abstract: An apparatus comprises a slider having an air-bearing surface (ABS), a write pole at or near the ABS, and a reader at or near the ABS and connected to a pair of reader bond pads of the slider. A near-field transducer (NFT) is formed on the slider at or near the ABS, and an optical waveguide is formed in the slider and configured to receive light from a laser source. A sensor is situated proximal of the write pole at a location within the slider that receives at least some of the light communicated along the waveguide. The sensor may be electrically coupled to the reader bond pads in parallel with the reader, and configured to generate a signal indicative of output optical power of the laser source.
Abstract translation: 一种装置包括具有空气轴承表面（ABS），ABS或ABS附近的写入极的滑块，以及ABS附近或附近的读取器，并连接到滑块的一对读取器接合焊盘。 在ABS的ABS处或附近的滑块上形成近场换能器（NFT），并且在滑块中形成光波导，并配置为接收来自激光源的光。 传感器位于滑动件的位置附近位于写入极的附近，该位置接收沿着波导传播的至少一些光。 传感器可以与读取器并联地耦合到读取器接合焊盘，并且被配置为产生指示激光源的输出光功率的信号。
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13.发明授权公开(公告)号：US11823708B1
公开(公告)日：2023-11-21
申请号：US17877478
申请日：2022-07-29
Applicant: Seagate Technology LLC.
Inventor： Vivek Krishnamurthy , Scott Eugene Olson , Tyler Lenn Perry , John Charles Duda
IPC: G11B11/105 , G11B5/00 , G11B13/08 , H01S5/14 , H01S5/028 , H01S5/0683 , H01S5/12
CPC classification number: G11B13/08 , H01S5/028 , H01S5/06837 , H01S5/1215 , H01S5/141 , G11B2005/0021
Abstract: An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.
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公开(公告)号：US20210366515A1
公开(公告)日：2021-11-25
申请号：US17319444
申请日：2021-05-13
Applicant: Seagate Technology LLC
Inventor： Helene Parwana Habibi , Simon Bance , Martin Liam McGarry , Raul Horacio Andruet , Martin Giles Blaber , Weibin Chen , John Charles Duda , Mark Anthony Gubbins , Erik Jon Hutchinson , Vivek Krishnamurthy , Michael Allen Seigler , Chen Wang
Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.
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公开(公告)号：US10408674B2
公开(公告)日：2019-09-10
申请号：US16352243
申请日：2019-03-13
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
Abstract: An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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Patent Agency Ranking
公开(公告)号：US09959893B1
公开(公告)日：2018-05-01
申请号：US15657746
申请日：2017-07-24
Applicant: Seagate Technology LLC
Inventor： John Charles Duda , Zoran Jandric
CPC classification number: G11B5/6082 , G11B5/314 , G11B5/455 , G11B5/4866 , G11B5/607 , G11B5/6076 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus comprises a slider having an air bearing surface (ABS) and a near-field transducer (NFT) at or near the ABS. An optical waveguide is configured to couple light from a laser source to the NFT. A resistive sensor comprises an ABS section situated at or proximate the ABS and a distal section extending away from the ABS to a location at least lateral of or behind the NFT. The resistive sensor is configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium.
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公开(公告)号：US20160351209A1
公开(公告)日：2016-12-01
申请号：US15163035
申请日：2016-05-24
Applicant: Seagate Technology LLC
Inventor： Weibin Chen , Martin Blaber , Tong Zhao , Michael Christopher Kautzky , John Charles Duda
IPC: G11B5/31
CPC classification number: G11B5/314 , G11B5/3116 , G11B5/3133 , G11B2005/0021
Abstract: A near-field transducer includes first and second stacked base portions having a common outline shape. The second base portion is proximate alight delivery structure. A peg extends from the first base portion towards a media-facing surface. The peg includes a material that is more thermally robust than a plasmonic material of the base portion. The peg has a peg thickness that is less than a thickness of the first base portion. The first base portion has a first recess proximate the peg. The first recess separates the first base portion from the media-facing surface and exposes at least a top side of the peg.
Abstract translation: 近场换能器包括具有共同轮廓形状的第一和第二堆叠基部。 第二基部是靠近的输送结构。 钉从第一基部向面向介质的表面延伸。 钉子包括比基部的等离子体激元材料更耐热的材料。 钉具有小于第一基部的厚度的钉厚度。 第一基部具有靠近钉的第一凹部。 第一凹部将第一基部与面向介质的表面分开，并且至少暴露出钉的顶侧。
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18.发明授权公开(公告)号：US11437068B1
公开(公告)日：2022-09-06
申请号：US16943124
申请日：2020-07-30
Applicant: Seagate Technology LLC
Inventor： Vivek Krishnamurthy , Scott Eugene Olson , Tyler Lenn Perry , John Charles Duda
Abstract: A recording head includes an external cavity laser with an externally mounted part having an active region. The external cavity laser also includes a channel waveguide that delivers light towards a media-facing surface. A near-field transducer functions as a reflector, either alone or in combination with a Bragg grating in the channel waveguide. A reflective back facet of the externally mounted part and the reflector define a resonator of the external cavity laser.
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公开(公告)号：US11011201B2
公开(公告)日：2021-05-18
申请号：US16520629
申请日：2019-07-24
Applicant: Seagate Technology LLC
Inventor： Helene Parwana Habibi , Simon Bance , Martin Liam McGarry , Raul Horacio Andruet , Martin Giles Blaber , Weibin Chen , John Charles Duda , Mark Anthony Gubbins , Erik Jon Hutchinson , Vivek Krishnamurthy , Michael Allen Seigler , Chen Wang
Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.
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20.发明申请公开(公告)号：US20190212192A1
公开(公告)日：2019-07-11
申请号：US16352243
申请日：2019-03-13
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
CPC classification number: G01J1/4257 , G01K7/16
Abstract: An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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