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公开(公告)号：US20140254040A1
公开(公告)日：2014-09-11
申请号：US14165906
申请日：2014-01-28
发明人： Dongming Liu , Kenneth Haapala , Scott E. Ryun , Lin Zhou
IPC分类号： G11B5/58
CPC分类号： G11B5/581 , G11B5/607 , G11B5/6076
摘要： 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.
摘要翻译： 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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2.发明授权公开(公告)号：US09548072B2
公开(公告)日：2017-01-17
申请号：US14619769
申请日：2015-02-11
发明人： Huazhou Lou , Jason Riddering , Shawn S. Silewski , Dongming Liu , Lin Zhou
CPC分类号： G11B5/6076 , G11B5/314 , G11B5/6017 , G11B5/607 , G11B5/6088 , G11B7/00 , G11B11/10558 , G11B11/1058 , G11B2005/0021 , G11B2220/2525
摘要： 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.
摘要翻译： 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：US20140254344A1
公开(公告)日：2014-09-11
申请号：US14282176
申请日：2014-05-20
IPC分类号： G11B5/60
CPC分类号： G11B5/6029 , G11B5/6005 , G11B5/6011 , G11B5/607 , G11B5/6076 , G11B27/36 , G11B2220/2516
摘要： 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.
摘要翻译： 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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公开(公告)号：US20160232931A1
公开(公告)日：2016-08-11
申请号：US14619769
申请日：2015-02-11
发明人： Huazhou Lou , Jason Riddering , Shawn S. Silewski , Dongming Liu , Lin Zhou
IPC分类号： G11B5/60
CPC分类号： G11B5/6076 , G11B5/314 , G11B5/6017 , G11B5/607 , G11B5/6088 , G11B7/00 , G11B11/10558 , G11B11/1058 , G11B2005/0021 , G11B2220/2525
摘要： 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.
摘要翻译： 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：US09171581B2
公开(公告)日：2015-10-27
申请号：US13790820
申请日：2013-03-08
发明人： Huazhou Lou , Lin Zhou
CPC分类号： G11B27/36 , G11B5/4555 , G11B5/6058 , G11B5/607 , G11B5/6076
摘要： The application discloses a sensor device to measure friction force at a head-media interface. As disclosed, the sensor device has a transducer element oriented to provide an electrical output responsive to force or strain imparted to the transducer element along an in-plane axis. Sensor circuitry is coupled to the transducer element to process the electrical output to provide an output measure of friction force. In illustrated embodiments, the head includes an actuator element which is powered on/off at an on/off frequency to cyclically protrude a localized portion of the head. The on/off frequency of the actuator is used by the sensor circuitry to detect excitation of the sensor device due to friction force at the head-media interface.
摘要翻译： 本申请公开了一种用于测量头部 - 媒体界面上的摩擦力的传感器装置。 如所公开的，传感器装置具有换向器元件，该换能器元件被定向成响应于沿着平面内轴线传递给换能器元件的力或应变来提供电输出。 传感器电路耦合到换能器元件以处理电输出以提供摩擦力的输出量度。 在所示的实施例中，头部包括致动器元件，该致动器元件在开/关频率上通电/断开以循环地突出头部的局部部分。 致动器的开/关频率由传感器电路用于由于头 - 媒体界面处的摩擦力来检测传感器装置的激励。
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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
CPC分类号： G11B5/6029 , G11B5/6005 , G11B5/6011 , G11B5/607 , G11B5/6076 , G11B27/36 , G11B2220/2516
摘要： 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.
摘要翻译： 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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公开(公告)号：US20160025772A1
公开(公告)日：2016-01-28
申请号：US14873839
申请日：2015-10-02
发明人： Lin Zhou , Huiwen Liu , Dale Egbert , Jonathan A. Nelson , Jianxin Zhu
摘要： Apparatus and associated method that contemplates performing a first atomic force microscope (AFM) scan of a first region of a sample centered at a first position at a first angle to produce a first scan image, the first AFM scan including a first component scan at a first speed and a second component scan at a second speed; performing a second AFM scan of the first region of the sample at a second angle to produce a second scan image, the second AFM scan including performing a third component scan at the first speed and a fourth component scan at the second speed; and correcting a first error in the first scan image based on the second scan image to produce a corrected image output.
摘要翻译： 一种设备和相关方法，其考虑以第一角度执行以第一位置为中心的样本的第一区域的第一原子力显微镜（AFM）扫描，以产生第一扫描图像，所述第一AFM扫描包括在 第一速度和第二分量以第二速度扫描; 以第二角度执行样本的第一区域的第二AFM扫描以产生第二扫描图像，所述第二AFM扫描包括以第一速度执行第三分量扫描和以第二速度执行第四分量扫描; 以及基于所述第二扫描图像校正所述第一扫描图像中的第一误差，以产生校正图像输出。
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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
发明人： Dongming Liu , Kenneth Haapala , Scott E. Ryun , Lin Zhou
CPC分类号： G11B5/581 , G11B5/607 , G11B5/6076
摘要： 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.
摘要翻译： 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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公开(公告)号：US20150103432A1
公开(公告)日：2015-04-16
申请号：US14050526
申请日：2013-10-10
发明人： Huazhou Lou , Lin Zhou , Vincent Engelkes
CPC分类号： G11B5/6076 , G11B5/012 , G11B5/4826 , G11B5/6011
摘要： In certain embodiments, a head-suspension assembly includes a resonator attached to either a head or gimbal. The resonator is configured to resonate at a predefined resonant frequency. In certain embodiments, disc drives includes a recording medium, a head-suspension assembly, and a resonator. The resonator is attached to either a head or gimbal of the head-suspension assembly. The resonator is configured to resonate at a predefined resonant frequency.
摘要翻译： 在某些实施例中，头悬挂组件包括附接到头部或万向节的谐振器。 谐振器被配置为以预定的谐振频率谐振。 在某些实施例中，盘驱动器包括记录介质，磁头 - 悬架组件和谐振器。 谐振器连接到头悬挂组件的头部或万向节。 谐振器被配置为以预定的谐振频率谐振。
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公开(公告)号：US20140254341A1
公开(公告)日：2014-09-11
申请号：US13790820
申请日：2013-03-08
发明人： Huazhou Lou , Lin Zhou
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B5/4555 , G11B5/6058 , G11B5/607 , G11B5/6076
摘要： The application discloses a sensor device to measure friction force at a head-media interface. As disclosed, the sensor device has a transducer element oriented to provide an electrical output responsive to force or strain imparted to the transducer element along an in-plane axis. Sensor circuitry is coupled to the transducer element to process the electrical output to provide an output measure of friction force. In illustrated embodiments, the head includes an actuator element which is powered on/off at an on/off frequency to cyclically protrude a localized portion of the head. The on/off frequency of the actuator is used by the sensor circuitry to detect excitation of the sensor device due to friction force at the head-media interface.
摘要翻译： 本申请公开了一种用于测量头部 - 媒体界面上的摩擦力的传感器装置。 如所公开的，传感器装置具有换向器元件，该换能器元件被定向成响应于沿着平面内轴线传递给换能器元件的力或应变来提供电输出。 传感器电路耦合到换能器元件以处理电输出以提供摩擦力的输出量度。 在所示的实施例中，头部包括致动器元件，该致动器元件在开/关频率上通电/断开以循环地突出头部的局部部分。 致动器的开/关频率由传感器电路用于由于头 - 媒体界面处的摩擦力来检测传感器装置的激励。
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