Patents by Inventor Manuel Charles Anaya Dufresne
Manuel Charles Anaya Dufresne 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: 11011191Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a second ABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.Type: GrantFiled: April 21, 2020Date of Patent: May 18, 2021Assignee: Seagate Technology LLCInventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
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Publication number: 20200265865Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a second ABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.Type: ApplicationFiled: April 21, 2020Publication date: August 20, 2020Inventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
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Patent number: 10657991Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a second ABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.Type: GrantFiled: July 29, 2019Date of Patent: May 19, 2020Assignee: Seagate Technology LLCInventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
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Publication number: 20200090686Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a second ABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.Type: ApplicationFiled: July 29, 2019Publication date: March 19, 2020Inventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
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Patent number: 10410660Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a second ABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.Type: GrantFiled: September 18, 2018Date of Patent: September 10, 2019Assignee: Seagate Technology LLCInventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
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Patent number: 9916847Abstract: An apparatus comprises a thermal sensor configured to interact with a magnetic recording disk. A head-disk interface is defined between the thermal sensor and the disk. A power supply is coupled to the thermal sensor and configured to supply a bias power to the thermal sensor between a low power and a high power. A processor is coupled to the thermal sensor and configured to determine a slope of a resistance response of the thermal sensor. The processor is further configured to detect a change in the slope relative to a baseline slope. The slope change indicates increased heat sinking between the thermal sensor and the disk due to the presence of contaminant buildup at the head-disk interface.Type: GrantFiled: May 12, 2016Date of Patent: March 13, 2018Assignee: Seagate Technology LLCInventors: Steven Douglas Granz, Michael Thomas Johnson, Patrick Carl Fletcher, Manuel Charles Anaya-Dufresne, Peng Peng
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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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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: 9454986Abstract: 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.Type: GrantFiled: August 24, 2015Date of Patent: September 27, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
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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: 9251830Abstract: An apparatus comprises a slider of a magnetic recording head having an air bearing surface (ABS), a write pole terminating at or near the ABS, and a near-field transducer (NFT) adjacent the write pole. A light delivery arrangement extends through the slider and terminates at the ABS. The light delivery arrangement is configured to communicate light through the slider and to the NFT. A transparent heat sink layer abuts a terminal end portion of the light delivery arrangement and terminates at the ABS. The heat sink layer has a thermal conductivity greater than that of the light delivery arrangement.Type: GrantFiled: May 19, 2015Date of Patent: February 2, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: John Charles Duda, Seung-Yeul Yang, Manuel Charles Anaya-Dufresne, Scott Franzen, Michael Christopher Kautzky, Xiaoyue Huang
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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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Publication number: 20150364152Abstract: 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.Type: ApplicationFiled: August 24, 2015Publication date: December 17, 2015Inventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
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Patent number: 9153276Abstract: 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.Type: GrantFiled: July 30, 2013Date of Patent: October 6, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
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Patent number: 9082440Abstract: A bias signal is applied to a resistive thermal sensor located proximate a magnetic media reading surface of a magnetic sensor. The bias signal is modulated between first and second bias levels. First and second resistances of the resistive thermal sensor corresponding to the first and second bias levels are measured. Based a difference between the first and second resistances caused by in increase in thermal conductivity between the magnetic sensor and a medium as the magnetic head gets closer to the medium, at least one of a spacing and a contact between the magnetic sensor and the medium are determined.Type: GrantFiled: July 23, 2012Date of Patent: July 14, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Manuel Charles Anaya Dufresne, Xuan Zheng, Dongming Liu
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Patent number: 9030773Abstract: An apparatus includes a near-field transducer at or near an air bearing surface of the apparatus. A write pole is disposed at or near the air bearing surface and proximate the near-field transducer, respectively. A thermal sensor is disposed at the air bearing surface and within a protrusion region of the air bearing surface defined relative to at least one of the near-field transducer and the write pole. The thermal sensor is configured to produce a signal indicative of a temperature at the protrusion region.Type: GrantFiled: September 15, 2014Date of Patent: May 12, 2015Assignee: Seagate Technology LLCInventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
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Publication number: 20150036469Abstract: 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.Type: ApplicationFiled: July 30, 2013Publication date: February 5, 2015Applicant: Seagate Technology LLCInventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
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Publication number: 20150003223Abstract: An apparatus includes a near-field transducer at or near an air bearing surface of the apparatus. A write pole is disposed at or near the air bearing surface and proximate the near-field transducer, respectively. A thermal sensor is disposed at the air bearing surface and within a protrusion region of the air bearing surface defined relative to at least one of the near-field transducer and the write pole. The thermal sensor is configured to produce a signal indicative of a temperature at the protrusion region.Type: ApplicationFiled: September 15, 2014Publication date: January 1, 2015Inventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
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Patent number: 8873352Abstract: An apparatus has a near-field transducer located proximate a media-facing surface of a slider magnetic recording heat. A waveguide is configured to couple light to the near-field transducer and includes a top cladding layer facing the near-field transducer, a bottom cladding layer, and a core layer between the top and bottom cladding layers. The apparatus includes a write pole with a flat portion substantially parallel to the core layer and a sloped portion extending from the flat portion of the write pole towards the media-facing surface at an angle to the core layer and to the media-facing surface. A light mitigation layer is located between the top cladding layer and the write pole.Type: GrantFiled: March 12, 2014Date of Patent: October 28, 2014Assignee: Seagate Technology LLCInventors: Zoran Jandric, Chris Rea, Pierre Asselin, Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, John C. Duda
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Patent number: 8837071Abstract: An apparatus includes a near-field transducer at or near an air bearing surface of the apparatus. A write pole is disposed at or near the air bearing surface and proximate the near-field transducer, respectively. A thermal sensor is disposed at the air bearing surface and within a protrusion region of the air bearing surface defined relative to at least one of the near-field transducer and the write pole. The thermal sensor is configured to produce a signal indicative of a temperature at the protrusion region.Type: GrantFiled: March 12, 2013Date of Patent: September 16, 2014Assignee: Seagate Technology LLCInventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne