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101.发明授权公开(公告)号：US10482908B2
公开(公告)日：2019-11-19
申请号：US16193189
申请日：2018-11-16
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , Jon D. Trantham , James Dillon Kiely , Peng Li , Joshua Ward Christensen
IPC: G11B11/105 , G11B5/455 , G11B5/60 , G11B5/00 , G11B7/126
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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102.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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公开(公告)号：US10268383B2
公开(公告)日：2019-04-23
申请号：US15256893
申请日：2016-09-06
Applicant: Seagate Technology LLC
Inventor： Mehmet Fatih Erden , Scott Warmka , Mark Allen Gaertner , Jon D. Trantham
Abstract: Two or more read modes of a data storage system and device are defined. The data storage device is capable of concurrently reading from two or more tracks using two or more read transducers. The read modes utilize different numbers of the two or more read transducers while reading data. The read modes are selected based on an operating condition of the data storage system or device.
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104.发明申请公开(公告)号：US20190103132A1
公开(公告)日：2019-04-04
申请号：US16193189
申请日：2018-11-16
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , Jon D. Trantham , James Dillon Kiely , Peng Li , Joshua Ward Christensen
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：US10240975B2
公开(公告)日：2019-03-26
申请号：US15190462
申请日：2016-06-23
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：US09953673B2
公开(公告)日：2018-04-24
申请号：US15200439
申请日：2016-07-01
Applicant: Seagate Technology LLC
Inventor： Antanas Daugela , Jon D. Trantham , Scott E. Ryun
CPC classification number: G11B5/6076 , G11B5/5534 , G11B5/607
Abstract: A storage device disclosed herein includes a transducer head with a proximity sensor that generates head-disc proximity signals, a digitizer configured to convert the analog proximity signals from the proximity sensor to digitized sample data, a discrete wavelet transformation (DWT) module configured to analyze the digitized sample data by performing an enhanced DWT on the digitized sample data to generate DWT coefficients, and a modal filter configured to determine dominant head-disc interference (HDI) modes for a transducer head by analyzing the DWT coefficients.
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107.发明申请公开(公告)号：US20170370770A1
公开(公告)日：2017-12-28
申请号：US15190462
申请日：2016-06-23
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
IPC: G01J1/42
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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公开(公告)号：US20170287514A1
公开(公告)日：2017-10-05
申请号：US15086959
申请日：2016-03-31
Applicant: Seagate Technology LLC
Inventor： Tim Rausch , Jon D. Trantham , Jason Bryce Gadbois
IPC: G11B5/60
CPC classification number: G11B5/607 , G11B5/02 , G11B5/3977 , G11B5/4853
Abstract: A read/write head has a set of components that at least include: at least one clearance actuator; at least one read transducer configured to read from a magnetic recording medium; and at least one write transducer configured to write to the magnetic recording medium. A switch network is coupled to the set of components and configured to, in response to a control signal, couple a selected sub-combination of the components to a common set of signal lines. The coupling of the selected sub-combination facilitates operation in a selected mode of the read/write head.
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公开(公告)号：US09552252B2
公开(公告)日：2017-01-24
申请号：US14467983
申请日：2014-08-25
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Brian T. Edgar , Mark Gaertner , Bruce Buch
CPC classification number: G06F11/1004 , G06F11/1012 , H03M13/09 , H03M13/096
Abstract: Certain exemplary aspects of the present disclosure are directed towards methods and apparatuses in which logic circuitry generates an error detection code based on user data received from a host, and further generates a first set of check bits, to be written to the non-volatile memory circuit in conjunction with the user data, by combining the error detection code with a hashed data address of the user data. In some embodiments, the check bits associated with the user data providing verification that the user data was written in the appropriate physical block address of the non-volatile memory circuit.
Abstract translation: 本公开的某些示例性方面涉及其中逻辑电路基于从主机接收的用户数据生成错误检测码的方法和装置，并进一步产生要写入非易失性存储器的第一组校验位 通过将错误检测码与用户数据的散列数据地址组合在一起，与用户数据相结合。 在一些实施例中，与用户数据相关联的校验位提供用户数据被写入非易失性存储器电路的适当物理块地址中的验证。
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110.发明授权Adjusting track spacing for heat assisted recording medium according to reader to-reader separation 有权根据读写器分离，调整热辅助记录介质的轨迹间距公开(公告)号：US09460741B1
公开(公告)日：2016-10-04
申请号：US14862937
申请日：2015-09-23
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Tim Rausch , Jason C. Jury
CPC classification number: G11B5/581 , G11B5/012 , G11B5/02 , G11B5/3945 , G11B5/397 , G11B5/4826 , G11B5/4886 , G11B2005/0021 , G11B2020/1292 , G11B2020/1298
Abstract: Two or more reader sensors are commonly mounted on a read/write head that is configured to read data from a heat-assisted recording medium. For a region of the recording medium, a separation is determined for the reader sensors. A track spacing that provides a target areal density for the region is determined. The track spacing for the region is adjusted to approach a predetermined ratio of the separation.
Abstract translation: 两个或多个读取器传感器通常安装在读/写头上，读/写头被配置为从热辅助记录介质读取数据。 对于记录介质的区域，确定读取器传感器的分离。 确定提供区域的目标区域密度的轨道间距。 调整该区域的轨道间距以接近预定比例的分离。
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