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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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2.发明授权公开(公告)号：US09865292B1
公开(公告)日：2018-01-09
申请号：US15445388
申请日：2017-02-28
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Neil Zuckerman
CPC classification number: G11B5/607 , G11B5/6076 , G11B2005/0021
Abstract: A slider having an air bearing surface is configured for heat-assisted magnetic recording. A writer of the slider comprises a writer coil. A current source is configured to supply a modulated writer current at a first predetermined frequency to the writer coil. A writer heater is situated proximate the writer and configured to thermally actuate a writer region of the air bearing surface. A contact sensor is situated proximate the writer coil and configured to sense temperature changes indicative of changes in spacing and contact between the slider and a magnetic recording medium. A signal produced by the contact sensor oscillates at the first predetermined frequency. A detector is coupled to the contact sensor. The detector is configured to detect contact between the thermally actuated writer region and the medium using the contact sensor signal.
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公开(公告)号：US09799358B2
公开(公告)日：2017-10-24
申请号：US14037139
申请日：2013-09-25
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Jon D. Trantham
Abstract: A heat generating component of a slider is energized at a predetermined frequency. The heat generating component changes a spacing between a medium and the slider. A temperature response proximate a media-facing surface of the slider is measured while the heating element is energized. Based on the measured temperature response, a determination is made as to whether the media-facing surface is contaminated. In response to determining that the media-facing surface is contaminated, remedial action is taken.
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公开(公告)号：US10366722B1
公开(公告)日：2019-07-30
申请号：US15978432
申请日：2018-05-14
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , James Dillon Kiely , Joshua Ward Christensen , Jon D. Trantham , Chad Robert Barry , Tim Rausch
IPC: G11B11/00 , G11B7/1263 , G11B5/00 , G11B7/1267 , G11B5/60 , G11B7/126
Abstract: An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
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公开(公告)号：US09202499B2
公开(公告)日：2015-12-01
申请号：US13802386
申请日：2013-03-13
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Karl Scheppers , Declan Macken , Michael Thomas Johnson
CPC classification number: G11B5/6076 , G11B5/3116 , G11B5/3133 , G11B5/3136 , G11B5/314 , G11B5/607 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus is arranged to detect contact between an air bearing surface of a transducer and a medium using a modulated thermal sensor signal. A laser source produces modulated laser light. A thermal sensor is disposed at or near the air bearing surface and is subject to cyclic heating by the modulated laser light. The thermal sensor is configured to produce the modulated sensor signal in response to the cyclic heating.
Abstract translation: 一种装置被布置成使用调制的热传感器信号检测换能器的空气轴承表面和介质之间的接触。 激光源产生调制激光。 热传感器设置在空气轴承表面上或附近，并且通过调制的激光进行循环加热。 热传感器被配置为响应于循环加热产生调制的传感器信号。
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Patent Agency Ranking
公开(公告)号：US20150085632A1
公开(公告)日：2015-03-26
申请号：US14037139
申请日：2013-09-25
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Jon D. Trantham
IPC: G11B27/36
Abstract: A heat generating component of a slider is energized at a predetermined frequency. The heat generating component changes a spacing between a medium and the slider. A temperature response proximate a media-facing surface of the slider is measured while the heating element is energized. Based on the measured temperature response, a determination is made as to whether the media-facing surface is contaminated. In response to determining that the media-facing surface is contaminated, remedial action is taken.
Abstract translation: 滑块的发热部件以预定的频率被激励。 发热组件改变介质和滑块之间的间距。 在加热元件通电时测量靠近滑块的面向媒体的表面的温度响应。 基于测量的温度响应，确定面向介质的表面是否被污染。 响应确定面向媒体的表面受到污染，采取补救措施。
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7.发明申请公开(公告)号：US20180330754A1
公开(公告)日：2018-11-15
申请号：US15594812
申请日：2017-05-15
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , Jon D. Trantham , James Dillon Kiely , Peng Li , Joshua Ward Christensen
CPC classification number: G11B13/045 , G11B5/6088 , G11B7/126 , G11B13/08 , G11B20/1816 , G11B2005/0021
Abstract: An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
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公开(公告)号：US09019646B2
公开(公告)日：2015-04-28
申请号：US13831129
申请日：2013-03-14
Applicant: Seagate Technology LLC
Inventor： Tim Rausch , Jon D. Trantham , John West Dykes , Housan Dakroub , Charles Paul Henry , Edward Charles Gage , Raul Horacio Andruet , James Gary Wessel , James Dillon Kiely , Bruce Douglas Buch , Barmeshwar Vikramaditya
CPC classification number: G11B13/04 , G11B5/314 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus includes a write element configured to apply a magnetic field to write data on a portion of a heat-assisted magnetic recording media in response to an energizing current. An energy source is configured to heat the portion of the media being magnetized by the write element. A preheat energizing current is applied to the write element during an interval before writing the data to the portion of the media. The preheat energizing current does not cause data to be written to the media and brings at least one of the write element and driver circuitry into thermal equilibrium prior to writing the data on the portion.
Abstract translation: 一种装置包括：写入元件，其被配置为响应于激励电流施加磁场以在热辅助磁记录介质的一部分上写入数据。 能量源被配置为加热被写入元件磁化的介质的部分。 在将数据写入介质的一部分之前的间隔期间，将预热通电电流施加到写入元件。 在将数据写入该部分之前，预热通电电流不会导致数据被写入介质并且使写入元件和驱动器电路中的至少一个进入热平衡。
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公开(公告)号：US20150003223A1
公开(公告)日：2015-01-01
申请号：US14486220
申请日：2014-09-15
Applicant: Seagate Technology LLC
Inventor： Declan Macken , James Dillon Kiely , Manuel Charles Anaya-Dufresne
CPC classification number: G11B5/607 , G11B5/314 , G11B5/4866 , G11B5/6005 , G11B5/6011 , G11B5/6088 , G11B27/17 , G11B2005/0021
Abstract: An apparatus includes a near-field transducer at or near an air bearing surface of the apparatus. A write pole is disposed at or near the air bearing surface and proximate the near-field transducer, respectively. A thermal sensor is disposed at the air bearing surface and within a protrusion region of the air bearing surface defined relative to at least one of the near-field transducer and the write pole. The thermal sensor is configured to produce a signal indicative of a temperature at the protrusion region.
Abstract translation: 一种装置包括在装置的空气轴承表面处或附近的近场换能器。 写入极分别设置在空气支承表面处或靠近近场传感器处。 热传感器设置在空气轴承表面和在相对于近场换能器和写极中的至少一个限定的空气轴承表面的突出区域内。 热传感器被配置为产生指示突出区域处的温度的信号。
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公开(公告)号：US20140029396A1
公开(公告)日：2014-01-30
申请号：US13831129
申请日：2013-03-14
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Tim Rausch , Jon D. Trantham , John West Dykes , Housan Dakroub , Charles Paul Henry , Edward Charles Gage , Raul Horacio Andruet , James Gary Wessel , James Dillon Kiely , Bruce Douglas Buch , Barmeshwar Vikramaditya
IPC: G11B13/04
CPC classification number: G11B13/04 , G11B5/314 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus includes a write element configured to apply a magnetic field to write data on a portion of a heat-assisted magnetic recording media in response to an energizing current. An energy source is configured to heat the portion of the media being magnetized by the write element. A preheat energizing current is applied to the write element during an interval before writing the data to the portion of the media. The preheat energizing current does not cause data to be written to the media and brings at least one of the write element and driver circuitry into thermal equilibrium prior to writing the data on the portion.
Abstract translation: 一种装置包括：写入元件，其被配置为响应于激励电流施加磁场以在热辅助磁记录介质的一部分上写入数据。 能量源被配置为加热被写入元件磁化的介质的部分。 在将数据写入介质的一部分之前的间隔期间，将预热通电电流施加到写入元件。 在将数据写入该部分之前，预热通电电流不会导致数据被写入介质并且使写入元件和驱动器电路中的至少一个进入热平衡。
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