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11.发明申请HEAD TRANSDUCER WITH MULTIPLE RESISTANCE TEMPERATURE SENSORS FOR HEAD-MEDIUM SPACING AND CONTACT DETECTION 有权具有多电阻温度传感器的头传感器用于中间间隔和接触检测公开(公告)号：US20150255102A1
公开(公告)日：2015-09-10
申请号：US14720299
申请日：2015-05-22
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Dongming Liu , Huazhou Lou , Declan Macken , Timothy William Stoebe , James Gary Wessel , Xuan Zheng
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 head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.
Abstract translation: 被配置为与磁记录介质相互作用的头传感器包括具有温度系数电阻（TCR）并被配置为产生第一传感器信号的第一传感器，以及具有TCR并被配置为产生第二传感器信号的第二传感器 。 第一传感器和第二传感器中的一个位于头部换能器相对于磁记录介质的接近点附近，并且第一传感器和第二传感器中的另一个与近端点间隔开。 电路被配置为组合第一和第二传感器信号并产生指示头 - 介质间隔和头 - 介质接触的变化中的一个或两个的组合的传感器信号。 每个传感器可以具有相同符号（正或负）的TCR，或者每个传感器可以具有不同符号的TCR。
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12.发明授权Head transducer with multiple resistance temperature sensors for head-medium spacing and contact detection 有权头传感器，具有多个电阻温度传感器，用于头中间距和接触检测公开(公告)号：US09036290B2
公开(公告)日：2015-05-19
申请号：US14457678
申请日：2014-08-12
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Dongming Liu , Huazhou Lou , Declan Macken , Timothy William Stoebe , James Gary Wessel , Xuan Zheng
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 head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.
Abstract translation: 被配置为与磁记录介质相互作用的头传感器包括具有温度系数电阻（TCR）并被配置为产生第一传感器信号的第一传感器，以及具有TCR并被配置为产生第二传感器信号的第二传感器 。 第一传感器和第二传感器中的一个位于头部换能器相对于磁记录介质的接近点附近，并且第一传感器和第二传感器中的另一个与近端点间隔开。 电路被配置为组合第一和第二传感器信号并产生指示头 - 介质间隔和头 - 介质接触的变化中的一个或两个的组合的传感器信号。 每个传感器可以具有相同符号（正或负）的TCR，或者每个传感器可以具有不同符号的TCR。
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公开(公告)号：US20140254344A1
公开(公告)日：2014-09-11
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
IPC: G11B5/60
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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14.发明公开公开(公告)号：US20230311268A1
公开(公告)日：2023-10-05
申请号：US18199526
申请日：2023-05-19
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：US09047898B2
公开(公告)日：2015-06-02
申请号：US14165906
申请日：2014-01-28
Applicant: Seagate Technology LLC
Inventor： Dongming Liu , Kenneth Haapala , Scott E. Ryun , Lin Zhou
CPC classification number: G11B5/581 , G11B5/607 , G11B5/6076
Abstract: An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power.
Abstract translation: 一种装置包括：头部换能器，被配置为与磁记录介质相互作用;以及加热器，其被配置为热致动头部换能器。 在头部传感器处或附近的热传感器被配置成产生传感器信号。 电路耦合到加热器并且被配置为引起加热器功率的振荡。 加热器功率振荡导致传感器信号的振荡。 检测器耦合到热传感器并且被配置为使用振荡传感器信号和加热器功率检测头 - 介质接触。
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Patent Agency Ranking
16.发明授权公开(公告)号：US09042050B2
公开(公告)日：2015-05-26
申请号：US14457694
申请日：2014-08-12
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Dongming Liu , Huazhou Lou , Declan Macken , Timothy William Stoebe , James Gary Wessel , Xuan Zheng
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 head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.
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17.发明申请公开(公告)号：US20140347760A1
公开(公告)日：2014-11-27
申请号：US14457678
申请日：2014-08-12
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Dongming Liu , Huazhou Lou , Declan Macken , Timothy William Stoebe , James Gary Wessel , Xuan Zheng
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 head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.
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18.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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19.发明申请公开(公告)号：US20160232931A1
公开(公告)日：2016-08-11
申请号：US14619769
申请日：2015-02-11
Applicant: Seagate Technology LLC
Inventor： Huazhou Lou , Jason Riddering , Shawn S. Silewski , Dongming Liu , Lin Zhou
IPC: G11B5/60
CPC classification number: G11B5/6076 , G11B5/314 , G11B5/6017 , G11B5/607 , G11B5/6088 , G11B7/00 , G11B11/10558 , G11B11/1058 , G11B2005/0021 , G11B2220/2525
Abstract: An apparatus comprises a heat-assisted magnetic recording (HAMR) head, a sensor, and a controller. The HAMR head is configured to interact with a magnetic storage medium. The sensor is configured to produce a signal indicating the occurrence of head-medium contact. The controller is configured to receive the signal and concurrently determine from the signal if the occurrence of head-medium contact is caused by a first contact detection parameter, a second contact detection parameter, or both the first and second contact detection parameters.
Abstract translation: 一种装置包括热辅助磁记录（HAMR）头，传感器和控制器。 HAMR头配置成与磁存储介质相互作用。 传感器被配置为产生指示头 - 介质接触的发生的信号。 控制器被配置为接收信号并且同时从信号确定头 - 介质接触的发生是由第一接触检测参数，第二接触检测参数或第一和第二接触检测参数两者引起的。
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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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