-
公开(公告)号：US10607646B2
公开(公告)日：2020-03-31
申请号：US16423594
申请日：2019-05-28
Applicant: Seagate Technology LLC
Abstract: A method includes moving a heat-assisted magnetic recording (HAMR) slider relative to a magnetic recording medium. The slider comprises a writer, a writer heater, and a near-field transducer (NFT). For each of a plurality of different head-to media spacings a test tone is written to a track of the medium, the test tone is read and a Discrete Fourier Transform (DFT) of an amplitude of the read test tone is captured. A first DFT curve is generated at a beginning of writing the test tones. A second DFT curve is generated at a saturated state of writing the test tones. An amount of horizontal shift between the first and second DFT curves is computed. The amount of horizontal shift corresponding to writer heater power required to compensate for NFT clearance offset due to laser induced writer protrusion.
-
2.发明申请公开(公告)号：US20200058323A1
公开(公告)日：2020-02-20
申请号：US16423594
申请日：2019-05-28
Applicant: Seagate Technology LLC
Abstract: A method includes moving a heat-assisted magnetic recording (HAMR) slider relative to a magnetic recording medium. The slider comprises a writer, a writer heater, and a near-field transducer (NFT). For each of a plurality of different head-to media spacings a test tone is written to a track of the medium, the test tone is read and a Discrete Fourier Transform (DFT) of an amplitude of the read test tone is captured. A first DFT curve is generated at a beginning of writing the test tones. A second DFT curve is generated at a saturated state of writing the test tones. An amount of horizontal shift between the first and second DFT curves is computed. The amount of horizontal shift corresponding to writer heater power required to compensate for NFT clearance offset due to laser induced writer protrusion.
-
公开(公告)号：US09093084B2
公开(公告)日：2015-07-28
申请号：US14099035
申请日：2013-12-06
Applicant: Seagate Technology LLC
Inventor： Peng Peng , Zhen Wei , Declan Macken , Darreyl Sedbrook , Muhammed Mujahid Khan
CPC classification number: G11B5/4866 , G11B5/02 , G11B5/3133 , G11B5/3945 , G11B5/607 , G11B5/6076
Abstract: A first biasing potential is sent to a first input end of a first temperature coefficient of resistance (TCR) sensor having a first ground end coupled to a ground potential. A second biasing potential is sent to a second input end of a second TCR sensor having a second ground end coupled to the ground potential. The first and the second biasing potentials are changed to operate in a plurality of modes.
Abstract translation: 第一偏置电位被发送到具有耦合到地电位的第一接地端的第一温度系数电阻（TCR）传感器的第一输入端。 第二偏置电位被发送到具有耦合到地电位的第二接地端的第二TCR传感器的第二输入端。 第一和第二偏置电位被改变为以多种模式操作。
-
4.发明申请RESISTIVE TEMPERATURE SENSORS FOR IMPROVED ASPERITY, HEAD-MEDIA SPACING, AND/OR HEAD-MEDIA CONTACT DETECTION 审中-公开电阻温度传感器用于改进的平台，头部介质间隔和/或头部介质接触检测公开(公告)号：US20160372144A1
公开(公告)日：2016-12-22
申请号：US15251663
申请日：2016-08-30
Applicant: Seagate Technology LLC
Inventor： Manuel Charles Anaya-Dufresne , Brian William Karr , Gary Joseph Kunkel , Zhen Wei
IPC: G11B5/60
CPC classification number: G11B5/607 , G01K13/00 , G11B5/024 , G11B5/3133 , G11B5/6011 , G11B5/6076 , G11B7/0948 , G11B7/121 , G11B20/10 , G11B27/36
Abstract: A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium.
Abstract translation: 由头部换能器支撑的传感器具有电阻温度系数（TCR）和传感器电阻。 传感器在高于环境温度的温度下工作，并响应传感器 - 介质间距的变化。 连接到传感器的导电触头具有与传感器相邻的接触电阻和与传感器相邻的横截面面积，使得接触电阻相对于传感器电阻较小，并且对传感器产生的信号可忽略不计。 多个头传感器各自支持TCR传感器，并且电源可以向每个头部的每个传感器提供偏置功率，以在存在影响传感器的热传递变化的情况下将每个传感器维持在高于环境温度的固定温度。 头传感器的TCR传感器可以包括用于感测介质的粗糙体中的一个或两个的面向轨道的TCR传感器线。
-
公开(公告)号：US09449629B2
公开(公告)日：2016-09-20
申请号：US14827603
申请日：2015-08-17
Applicant: Seagate Technology LLC
Inventor： Manuel Charles Anaya-Dufresne , Brian William Karr , Gary Joseph Kunkel , Zhen Wei
CPC classification number: G11B5/607 , G01K13/00 , G11B5/024 , G11B5/3133 , G11B5/6011 , G11B5/6076 , G11B7/0948 , G11B7/121 , G11B20/10 , G11B27/36
Abstract: A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium.
-
Patent Agency Ranking
公开(公告)号：US10319400B1
公开(公告)日：2019-06-11
申请号：US16104214
申请日：2018-08-17
Applicant: Seagate Technology LLC
Abstract: A method includes moving a heat-assisted magnetic recording (HAMR) slider relative to a magnetic recording medium. The slider comprises a writer, a writer heater, and a near-field transducer (NFT). For each of a plurality of different head-to media spacings a test tone is written to a track of the medium, the test tone is read and a Discrete Fourier Transform (DFT) of an amplitude of the read test tone is captured. A first DFT curve is generated at a beginning of writing the test tones. A second DFT curve is generated at a saturated state of writing the test tones. An amount of horizontal shift between the first and second DFT curves is computed. The amount of horizontal shift corresponding to writer heater power required to compensate for NFT clearance offset due to laser induced writer protrusion.
-
7.发明申请公开(公告)号：US20160019923A1
公开(公告)日：2016-01-21
申请号：US14827603
申请日：2015-08-17
Applicant: Seagate Technology LLC
Inventor： Manuel Charles Anaya-Dufresne , Brian William Karr , Gary Joseph Kunkel , Zhen Wei
CPC classification number: G11B5/607 , G01K13/00 , G11B5/024 , G11B5/3133 , G11B5/6011 , G11B5/6076 , G11B7/0948 , G11B7/121 , G11B20/10 , G11B27/36
Abstract: A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium.
-
公开(公告)号：US20150162022A1
公开(公告)日：2015-06-11
申请号：US14099035
申请日：2013-12-06
Applicant: Seagate Technology LLC
Inventor： Peng Peng , Zhen Wei , Declan Macken , Darreyl Sedbrook , Muhammed Mujahid Khan
IPC: G11B5/03
CPC classification number: G11B5/4866 , G11B5/02 , G11B5/3133 , G11B5/3945 , G11B5/607 , G11B5/6076
Abstract: A first biasing potential is sent to a first input end of a first temperature coefficient of resistance (TCR) sensor having a first ground end coupled to a ground potential. A second biasing potential is sent to a second input end of a second TCR sensor having a second ground end coupled to the ground potential. The first and the second biasing potentials are changed to operate in a plurality of modes.
Abstract translation: 第一偏置电位被发送到具有耦合到地电位的第一接地端的第一温度系数电阻（TCR）传感器的第一输入端。 第二偏置电位被发送到具有耦合到地电位的第二接地端的第二TCR传感器的第二输入端。 第一和第二偏置电位被改变为以多种模式操作。
-
公开(公告)号：US10002631B1
公开(公告)日：2018-06-19
申请号：US15631489
申请日：2017-06-23
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Zhen Wei , Neil Zuckerman , John Charles Duda , Eric L. Montei
CPC classification number: G11B5/607 , G11B5/6076
Abstract: An apparatus comprising a slider and a detector coupled to the slider. The slider is configured for writing data to and reading data from a magnetic recording medium. The slider comprises a heater configured to receive a modulated signal and cause oscillation in a spacing between the slider and the medium. At least one heat generating component of the slider is configured to receive a modulated signal. A contact sensor is situated on the slider to receive heat generated by the at least one heat generating component. The detector is configured to measure a response signal of the heated contact sensor as the slider approaches the medium. The detector is further configured to detect contact between the slider and the medium in response to the response signal reaching a predetermined threshold.
-
10.发明授权公开(公告)号：US09812161B2
公开(公告)日：2017-11-07
申请号：US15251663
申请日：2016-08-30
Applicant: Seagate Technology LLC
Inventor： Manuel Charles Anaya-Dufresne , Brian William Karr , Gary Joseph Kunkel , Zhen Wei
IPC: G11B21/02 , G11B5/60 , G11B20/10 , G01K13/00 , G11B5/024 , G11B5/31 , G11B27/36 , G11B7/09 , G11B7/121
CPC classification number: G11B5/607 , G01K13/00 , G11B5/024 , G11B5/3133 , G11B5/6011 , G11B5/6076 , G11B7/0948 , G11B7/121 , G11B20/10 , G11B27/36
Abstract: A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium.
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.015 seconds)
