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11.发明授权公开(公告)号：US11691242B2
公开(公告)日：2023-07-04
申请号：US17720847
申请日：2022-04-14
Applicant: Seagate Technology LLC
Inventor： Edwin Rejda , Andrew Habermas , Jeff O'Konski , Andrew Sherve , Michael Thomas Johnson , Dongming Liu
CPC classification number: B24B37/048 , G11B5/3169
Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.
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公开(公告)号：US10803886B1
公开(公告)日：2020-10-13
申请号：US16234831
申请日：2018-12-28
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Michael Thomas Johnson , Todd Michael Lammers , Kent Edward Bodurtha
Abstract: An apparatus includes a slider configured for heat-assisted magnetic recording, the slider comprising an air bearing surface (ABS), a writer, a reader, and a plurality of electrical bond-pads. The apparatus also includes a first component situated at the ABS of the slider proximate the reader and operatively coupled to a first pair of the plurality of electrical bond-pads, the first component being a thermocouple configured to sense for a thermal aspect of a magnetic recording medium surface. According to aspects of the invention, the slider is configured to share at least one bond-pad by operatively coupling a second pair of the plurality of electrical bond-pads to a second component, and the slider is configured to selectively utilize the thermocouple and the second component.
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公开(公告)号：US09858953B1
公开(公告)日：2018-01-02
申请号：US15475364
申请日：2017-03-31
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson
CPC classification number: G11B5/41 , G11B5/607 , G11B5/6076 , G11B2005/0021
Abstract: A method of removing contamination from a magnetic recording head during contact detection, including the steps of setting a heat actuator at a first power level, dwelling at the first power level for a specified length of time, removing contamination from the head during the specified dwell time, oscillating the heat actuator from the first power level to a second level that is lower than the first level while detecting periodic contact between the head and an adjacent disk, calculating the amplitude of the detected periodic contact, and correlating the calculated amplitude to a clearance distance between the head and the disk.
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公开(公告)号：US09685182B1
公开(公告)日：2017-06-20
申请号：US14964870
申请日：2015-12-10
Applicant: Seagate Technology LLC
Inventor： Steven Douglas Granz , Michael Thomas Johnson
IPC: G11B11/00 , G11B5/60 , G11B5/00 , G11B11/105 , G11B7/1263 , G11B7/126
CPC classification number: G11B5/4555 , G11B5/607 , G11B5/6088 , G11B7/126 , G11B7/1263 , G11B11/10506 , G11B11/1051 , G11B2005/0021
Abstract: A method and apparatus are directed to providing relative movement between a slider configured for heat-assisted magnetic recording and a magnetic recording medium, and causing protrusion of a portion of an air bearing surface (ABS) of the slider in response to activating at least a laser source while maintaining spacing between the protrusion and the medium. A magnitude of at least a portion of the protrusion is measured while maintaining spacing between the protrusion and the medium.
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15.发明授权公开(公告)号：US09153276B2
公开(公告)日：2015-10-06
申请号：US13954142
申请日：2013-07-30
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Manuel Charles Anaya-Dufresne , Zoran Jandric
IPC: G11B11/00 , G11B13/08 , G11B11/105
CPC classification number: G11B7/1263 , G11B5/02 , G11B5/3136 , G11B5/40 , G11B5/455 , G11B5/607 , G11B11/10515 , G11B11/10595 , G11B13/08 , G11B2005/0021
Abstract: A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor is situated on the slider at a location outside of a light path that includes the intended focus location. The thermal sensor is configured for sensing a short time constant change in temperature resulting from light source heating of the thermal sensor, wherein the sensed change in thermal sensor temperature is representative of optical intensity of the light delivered to the intended focus location.
Abstract translation: 光源被配置为产生光，波导光学耦合到光源并且被配置为将光引导到预期的焦点位置，并且滑块被配置为使用光作为加热磁性区域的能量源 记录介质。 热传感器位于包括预期焦点位置的光路外部位置的滑块上。 热传感器被配置用于感测由热传感器的光源加热引起的短时间恒定温度变化，其中感测到的热传感器温度的变化代表传送到预期焦点位置的光的光强度。
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Patent Agency Ranking
公开(公告)号：US20150062754A1
公开(公告)日：2015-03-05
申请号：US14012480
申请日：2013-08-28
Applicant: Seagate Technology LLC
Inventor： Peng Peng , Declan Macken , Michael Thomas Johnson , Zheying Guo
IPC: G11B5/60
CPC classification number: G11B5/6076 , G11B5/1278 , G11B5/3133 , G11B5/3143 , G11B5/607
Abstract: A writer core of a transducer is configured to interact with a magnetic recording medium and comprises an upper core and a lower core. At least one of the upper and lower cores comprises a return pole having a return shield. The apparatus also comprises a writer pole between the upper and lower cores, and a writer gap defined between the writer pole and the return shield. The apparatus further comprises a sensor element within one of the upper and lower cores that includes the writer gap. The sensor element has a temperature coefficient of resistance and is configured to sense for a change in temperature indicative of one or both of a change in spacing and contact between the transducer and the magnetic recording medium.
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17.发明申请公开(公告)号：US20220234166A1
公开(公告)日：2022-07-28
申请号：US17720847
申请日：2022-04-14
Applicant: Seagate Technology LLC
Inventor： Edwin Rejda , Andrew Habermas , Jeff O'Konski , Andrew Sherve , Michael Thomas Johnson , Dongming Liu
Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.
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公开(公告)号：US20150364152A1
公开(公告)日：2015-12-17
申请号：US14834140
申请日：2015-08-24
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Manuel Charles Anaya-Dufresne , Zoran Jandric
IPC: G11B7/1263
CPC classification number: G11B7/1263 , G11B5/02 , G11B5/3136 , G11B5/40 , G11B5/455 , G11B5/607 , G11B11/10515 , G11B11/10595 , G11B13/08 , G11B2005/0021
Abstract: A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor is situated on the slider at a location outside of a light path that includes the intended focus location. The thermal sensor is configured for sensing a short time constant change in temperature resulting from light source heating of the thermal sensor, wherein the sensed change in thermal sensor temperature is representative of optical intensity of the light delivered to the intended focus location.
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公开(公告)号：US09135938B2
公开(公告)日：2015-09-15
申请号：US14282176
申请日：2014-05-20
Applicant: Seagate Technology LLC
Inventor： Dongming Liu , Lin Zhou , Adam Karl Himes , Lee Clifford Knippenberg , Michael Thomas Johnson
CPC classification number: G11B5/6029 , G11B5/6005 , G11B5/6011 , G11B5/607 , G11B5/6076 , G11B27/36 , G11B2220/2516
Abstract: A method of detecting a contact between a transducing head and a storage medium is provided. The method applies an input signal, having a select power level and known frequency, to an actuator for actuating the head. An output signal is obtained in response to the input signal. At least one signal component is extracted from the output signal at the same or a harmonic of the same known frequency as the input signal applied to the actuator. Whether the at least one extracted signal component indicates a contact between the head and the medium is determined. The power level of the applied wave pattern is increased incrementally until the extracted signal component indicates a contact between the head and the storage medium.
Abstract translation: 提供了一种检测换能头与存储介质之间的接触的方法。 该方法将具有选择功率电平和已知频率的输入信号施加到用于致动头部的致动器。 响应于输入信号获得输出信号。 以与施加到致动器的输入信号相同的已知频率的相同或谐波从输出信号提取至少一个信号分量。 确定至少一个提取的信号分量是否指示头部和介质之间的接触。 所施加的波形图案的功率电平逐渐增加，直到提取的信号分量表示头部和存储介质之间的接触。
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20.发明申请公开(公告)号：US20150036469A1
公开(公告)日：2015-02-05
申请号：US13954142
申请日：2013-07-30
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Manuel Charles Anaya-Dufresne , Zoran Jandric
IPC: G11B13/08
CPC classification number: G11B7/1263 , G11B5/02 , G11B5/3136 , G11B5/40 , G11B5/455 , G11B5/607 , G11B11/10515 , G11B11/10595 , G11B13/08 , G11B2005/0021
Abstract: A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor is situated on the slider at a location outside of a light path that includes the intended focus location. The thermal sensor is configured for sensing a short time constant change in temperature resulting from light source heating of the thermal sensor, wherein the sensed change in thermal sensor temperature is representative of optical intensity of the light delivered to the intended focus location.
Abstract translation: 光源被配置为产生光，波导光学耦合到光源并且被配置为将光引导到预期的焦点位置，并且滑块被配置为使用光作为加热磁性区域的能量源 记录介质。 热传感器位于包括预期焦点位置的光路外部位置的滑块上。 热传感器被配置用于感测由热传感器的光源加热引起的短时间恒定温度变化，其中感测到的热传感器温度的变化代表传送到预期焦点位置的光的光强度。
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