Patents by Inventor Gary Joseph Kunkel
Gary Joseph Kunkel 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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Publication number: 20200147748Abstract: An assembly for lapping multiple row bars, the assembly including a carrier having at least one carrier bond pad, multiple row bars adjacent to each other in a stack, wherein a first row bar of the stack is positioned closer to the carrier than any of the other multiple row bars of the stack and comprises at least one row bar bond pad, an electrical connection between at least one of the carrier bond pads and at least one of the row bar bond pads of the first row bar, and at least one electrical trace extending through at least two of the multiple row bars and electrically connected to at least the first row bar and one additional row bar of the stack. An outermost row bar of the stack includes an outer surface and at least one electronic lapping guide.Type: ApplicationFiled: December 27, 2019Publication date: May 14, 2020Inventors: Gary Joseph Kunkel, Zoran Jandric
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Patent number: 10410659Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.Type: GrantFiled: February 11, 2019Date of Patent: September 10, 2019Assignee: Seagate Technology LLCInventors: Gary Joseph Kunkel, Raul Horacio Andruet, James Gary Wessel
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Publication number: 20190172482Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.Type: ApplicationFiled: February 11, 2019Publication date: June 6, 2019Inventors: Gary Joseph Kunkel, Raul Horacio Andruet, James Gary Wessel
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Patent number: 10255937Abstract: A contact sensor is provided at or near an air bearing surface of a slider and having a temperature coefficient of resistance. The contact sensor is coupled to a lead arrangement comprising a first lead and a second lead. The contact sensor comprises a sensor element, a first peripheral wing comprising an inner wing connected to the sensor element and an outer wing connected to the first lead, and a second peripheral wing comprising an inner wing connected to the sensor element and an outer wing connected to the second lead. An electrically conductive overlay covers at least the outer wings of the first and second peripheral wings and some or all of the first and second electrical leads.Type: GrantFiled: April 11, 2017Date of Patent: April 9, 2019Assignee: Seagate Technology LLCInventors: Gary Joseph Kunkel, Jin Fang, Erik J. Hutchinson
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Patent number: 10249328Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.Type: GrantFiled: January 20, 2016Date of Patent: April 2, 2019Assignee: Seagate Technology LLCInventors: Gary Joseph Kunkel, Raul Horacio Andruet, James Gary Wessel
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Patent number: 9812161Abstract: 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.Type: GrantFiled: August 30, 2016Date of Patent: November 7, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
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Patent number: 9741375Abstract: A slider of a magnetic recording head has a leading edge, a trailing edge, and an air bearing surface between the leading and trailing edges. A sensor is situated at the trailing edge of the slider and configured to sense presence of a lube droplet or other contaminant at the trailing edge.Type: GrantFiled: November 19, 2015Date of Patent: August 22, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Gary Joseph Kunkel, Narayanan Ramakrishnan
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Publication number: 20170206917Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.Type: ApplicationFiled: January 20, 2016Publication date: July 20, 2017Inventors: Gary Joseph Kunkel, Raul Horacio Andruet, James Gary Wessel
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Publication number: 20170148475Abstract: A slider of a magnetic recording head has a leading edge, a trailing edge, and an air bearing surface between the leading and trailing edges. A sensor is situated at the trailing edge of the slider and configured to sense presence of a lube droplet or other contaminant at the trailing edge.Type: ApplicationFiled: November 19, 2015Publication date: May 25, 2017Inventors: Gary Joseph Kunkel, Narayanan Ramakrishnan
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Publication number: 20160372144Abstract: 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.Type: ApplicationFiled: August 30, 2016Publication date: December 22, 2016Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
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Patent number: 9449629Abstract: 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.Type: GrantFiled: August 17, 2015Date of Patent: September 20, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
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Patent number: 9373361Abstract: A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.Type: GrantFiled: August 17, 2015Date of Patent: June 21, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Gary Joseph Kunkel, John L. Brand
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Publication number: 20160019923Abstract: 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.Type: ApplicationFiled: August 17, 2015Publication date: January 21, 2016Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
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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: 20150380021Abstract: A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.Type: ApplicationFiled: August 17, 2015Publication date: December 31, 2015Inventors: Gary Joseph Kunkel, John L. Brand
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Patent number: 9111572Abstract: A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.Type: GrantFiled: May 27, 2014Date of Patent: August 18, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Gary Joseph Kunkel, John L. Brand
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Publication number: 20140268419Abstract: A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.Type: ApplicationFiled: May 27, 2014Publication date: September 18, 2014Applicant: Seagate Technology LLCInventors: Gary Joseph Kunkel, John L. Brand
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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: 8488278Abstract: In a disc drive, a slider having electronic communication with the surface of a data disc, the slider having a first up-track mill transition that has a transition mill to remove oblique mill transitions so that the transition has a substantially perpendicular portion that impacts contaminant particles on or near the disc surface. In other embodiments, other edges of the slider have transition mills to remove oblique transition mills from possible impact with such particles.Type: GrantFiled: October 23, 2009Date of Patent: July 16, 2013Assignee: Seagate Technology LLCInventors: Gary Joseph Kunkel, Quinn J. Haddock
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Patent number: 8139323Abstract: An apparatus includes a slider body having a leading edge and an opposite trailing edge, as well as a top face and a bottom face each extending between the leading edge and the trailing edge. The slider body further includes a plurality of protrusions extending from the bottom face, a first recess defined on one of the protrusions, and a sacrificial layer deposited on the slider body in the recess. A bottom surface of the sacrificial layer extends at least as far from the bottom face as bottom surfaces of the plurality of protrusions. In another aspect, a first blocking feature is located at a first uptrack edge on an air bearing surface of a slider, with the first blocking feature being substantially continuous along the first uptrack edge and protruding outwardly from the air bearing surface to reduce particle interaction with the air bearing surface.Type: GrantFiled: February 5, 2010Date of Patent: March 20, 2012Assignee: Seagate Technology LLCInventors: Marsha Anne Huha, Ki Myung Lee, Anil Junuthula Reddy, Ying Dong, Gary Joseph Kunkel, Matthew Aaron Carper, Andrew David Frenz, John L. Brand, Quinn Jay Haddock