Patents by Inventor Timothy William Stoebe
Timothy William Stoebe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9711173Abstract: An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads. A voltage applied to one more of the end bond pads sets a surface potential of the slider body.Type: GrantFiled: January 24, 2017Date of Patent: July 18, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Daniel W. Olson, Declan Macken, Timothy William Stoebe
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Publication number: 20170154646Abstract: An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads. A voltage applied to one more of the end bond pads sets a surface potential of the slider body.Type: ApplicationFiled: January 24, 2017Publication date: June 1, 2017Inventors: Daniel W. Olson, Declan Macken, Timothy William Stoebe
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Patent number: 9607659Abstract: A data storage system includes a recording head and a compensating resistor. The recording head has a heating element. The compensating resistor is in electrical series with the heating element and is external to the recording head. A method includes applying an alternating current at a first angular frequency to a recording head. A voltage drop across the recording head heating element is measured. A component of the voltage drop is extracted. The component has a frequency that is three times the frequency of the first angular frequency.Type: GrantFiled: September 3, 2013Date of Patent: March 28, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Xuan Zheng, Timothy William Stoebe
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Patent number: 9607640Abstract: An apparatus includes a slider of a recording head comprising a plurality of electrical bond pads coupled to bias sources and a ground pad. Each of a plurality of electrical components of the slider is coupled to at least one of the electrical bond pads. At least one of the electrical bond pads is a shared electrical bond pad coupled to at least two of the electrical components. At least one diode is coupled to at least one of the electrical bond pads and at least one of the electrical components.Type: GrantFiled: July 29, 2015Date of Patent: March 28, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Declan Macken, Jason Bryce Gadbois, Timothy William Stoebe, Narayanan Ramakrishnan
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Publication number: 20170032810Abstract: An apparatus includes a slider of a recording head comprising a plurality of electrical bond pads coupled to bias sources and a ground pad. Each of a plurality of electrical components of the slider is coupled to at least one of the electrical bond pads. At least one of the electrical bond pads is a shared electrical bond pad coupled to at least two of the electrical components. At least one diode is coupled to at least one of the electrical bond pads and at least one of the electrical components.Type: ApplicationFiled: July 29, 2015Publication date: February 2, 2017Inventors: Declan Macken, Jason Bryce Gadbois, Timothy William Stoebe, Narayanan Ramakrishnan
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Patent number: 9558773Abstract: An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads. A voltage applied to one more of the end bond pads sets a surface potential of the slider body.Type: GrantFiled: December 4, 2014Date of Patent: January 31, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Daniel W. Olson, Declan Macken, Timothy William Stoebe
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Patent number: 9390741Abstract: 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.Type: GrantFiled: May 22, 2015Date of Patent: July 12, 2016Assignee: SAEGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Publication number: 20160163343Abstract: An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads. A voltage applied to one more of the end bond pads sets a surface potential of the slider body.Type: ApplicationFiled: December 4, 2014Publication date: June 9, 2016Inventors: Daniel W. Olson, Declan Macken, Timothy William Stoebe
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Patent number: 9230594Abstract: A temperature sensor of a head transducer measures temperature near or at the close point. The measured temperature varies in response to changes in spacing between the head transducer and a magnetic recording medium. A detector is coupled to the temperature sensor and is configured to detect a change in a DC component of the measured temperature indicative of onset of contact between the head transducer and the medium. Another head transducer configuration includes a sensor having a sensing element with a high temperature coefficient of resistance to interact with asperities of the medium. Electrically conductive leads are connected to the sensing element and have a low temperature coefficient of resistance relative to that of the sensing element, such thermally induced resistance changes in the leads have a negligible effect on a response of the sensing element to contact with the asperities.Type: GrantFiled: May 27, 2014Date of Patent: January 5, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Gary Joseph Kunkel, Huazhou Lou, Declan Macken, Timothy William Stoebe
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Publication number: 20150255102Abstract: 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.Type: ApplicationFiled: May 22, 2015Publication date: September 10, 2015Inventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Patent number: 9042050Abstract: 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.Type: GrantFiled: August 12, 2014Date of Patent: May 26, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Patent number: 9036290Abstract: 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.Type: GrantFiled: August 12, 2014Date of Patent: May 19, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Patent number: 8937853Abstract: Changes in the thermal boundary condition near a close point of an ABS to a media indicate proximity of the ABS with the media. Before contact, heat conduction from the ABS is primarily through convective and/or ballistic heat transfer to air between the ABS and the media. After contact, heat flux primarily flows from the ABS to the media through solid-solid conductive contact. Further, a light source within a HAMR transducer head may create additional thermal variations within the transducer head. These thermal variations create temperature variations within the transducer head. Two resistance temperature sensors on the transducer head at varying distances from the close point and/or light source measure these temperature variations. A temperature difference between the two resistance temperature sensors indicates proximity of the close point to the media and/or light output.Type: GrantFiled: July 23, 2014Date of Patent: January 20, 2015Assignee: Seagate Technology LLCInventors: Xuan Zheng, Timothy William Stoebe, Jorge Hanchi, Kaizhong Gao
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Publication number: 20140355150Abstract: 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.Type: ApplicationFiled: August 12, 2014Publication date: December 4, 2014Inventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Publication number: 20140347760Abstract: 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.Type: ApplicationFiled: August 12, 2014Publication date: November 27, 2014Inventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Publication number: 20140334275Abstract: Changes in the thermal boundary condition near a close point of an ABS to a media indicate proximity of the ABS with the media. Before contact, heat conduction from the ABS is primarily through convective and/or ballistic heat transfer to air between the ABS and the media. After contact, heat flux primarily flows from the ABS to the media through solid-solid conductive contact. Further, a light source within a HAMR transducer head may create additional thermal variations within the transducer head. These thermal variations create temperature variations within the transducer head. Two resistance temperature sensors on the transducer head at varying distances from the close point and/or light source measure these temperature variations. A temperature difference between the two resistance temperature sensors indicates proximity of the close point to the media and/or light output.Type: ApplicationFiled: July 23, 2014Publication date: November 13, 2014Inventors: Xuan Zheng, Timothy William Stoebe, Jorge Hanchi, Kaizhong Gao
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Patent number: 8869590Abstract: A flexible member is coupled between an actuator arm and a slider. The flexible member facilitates relative motion in a tangential direction of a rotating medium. The relative motion is detected via a displacement sensor, and a friction between the slider and the rotating medium is determined based on the sensed relative motion.Type: GrantFiled: November 13, 2012Date of Patent: October 28, 2014Assignee: Seagate Technology LLCInventors: Huiwen Liu, David Wobbe, Xuan Zheng, Timothy William Stoebe
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Publication number: 20140268410Abstract: A temperature sensor of a head transducer measures temperature near or at the close point. The measured temperature varies in response to changes in spacing between the head transducer and a magnetic recording medium. A detector is coupled to the temperature sensor and is configured to detect a change in a DC component of the measured temperature indicative of onset of contact between the head transducer and the medium. Another head transducer configuration includes a sensor having a sensing element with a high temperature coefficient of resistance to interact with asperities of the medium. Electrically conductive leads are connected to the sensing element and have a low temperature coefficient of resistance relative to that of the sensing element, such thermally induced resistance changes in the leads have a negligible effect on a response of the sensing element to contact with the asperities.Type: ApplicationFiled: May 27, 2014Publication date: September 18, 2014Applicant: Seagate Technology LLCInventors: Gary Joseph Kunkel, Huazhou Lou, Declan Macken, Timothy William Stoebe
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Patent number: 8792311Abstract: Changes in the thermal boundary condition near a close point of an ABS to a media indicate proximity of the ABS with the media. Before contact, heat conduction from the ABS is primarily through convective and/or ballistic heat transfer to air between the ABS and the media. After contact, heat flux primarily flows from the ABS to the media through solid-solid conductive contact. Further, a light source within a HAMR transducer head may create additional thermal variations within the transducer head. These thermal variations create temperature variations within the transducer head. Two resistance temperature sensors on the transducer head at varying distances from the close point and/or light source measure these temperature variations. A temperature difference between the two resistance temperature sensors indicates proximity of the close point to the media and/or light output.Type: GrantFiled: February 8, 2011Date of Patent: July 29, 2014Assignee: Seagate Technology LLCInventors: Xuan Zheng, Timothy William Stoebe, Jorge Hanchi, Kaizhong Gao
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Publication number: 20140133053Abstract: A flexible member is coupled between an actuator arm and a slider. The flexible member facilitates relative motion in a tangential direction of a rotating medium. The relative motion is detected via a displacement sensor, and a friction between the slider and the rotating medium is determined based on the sensed relative motion.Type: ApplicationFiled: November 13, 2012Publication date: May 15, 2014Applicant: Seagate Technology LLCInventors: Huiwen Liu, David Wobbe, Xuan Zheng, Timothy William Stoebe