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).

  • Patent number: 10410660
    Abstract: 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: Grant
    Filed: September 18, 2018
    Date of Patent: September 10, 2019
    Assignee: Seagate Technology LLC
    Inventors: Erik Jon Hutchinson, Declan Macken, Manuel Charles Anaya-Dufresne
  • Patent number: 9916847
    Abstract: 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: Grant
    Filed: May 12, 2016
    Date of Patent: March 13, 2018
    Assignee: Seagate Technology LLC
    Inventors: Steven Douglas Granz, Michael Thomas Johnson, Patrick Carl Fletcher, Manuel Charles Anaya-Dufresne, Peng Peng
  • Patent number: 9812161
    Abstract: 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: Grant
    Filed: August 30, 2016
    Date of Patent: November 7, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
  • Publication number: 20160372144
    Abstract: 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: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
  • Patent number: 9454986
    Abstract: 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: Grant
    Filed: August 24, 2015
    Date of Patent: September 27, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
  • Patent number: 9449629
    Abstract: 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: Grant
    Filed: August 17, 2015
    Date of Patent: September 20, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
  • Patent number: 9251830
    Abstract: 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: Grant
    Filed: May 19, 2015
    Date of Patent: February 2, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: John Charles Duda, Seung-Yeul Yang, Manuel Charles Anaya-Dufresne, Scott Franzen, Michael Christopher Kautzky, Xiaoyue Huang
  • Publication number: 20160019923
    Abstract: 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: Application
    Filed: August 17, 2015
    Publication date: January 21, 2016
    Inventors: Manuel Charles Anaya-Dufresne, Brian William Karr, Gary Joseph Kunkel, Zhen Wei
  • Publication number: 20150364152
    Abstract: 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: Application
    Filed: August 24, 2015
    Publication date: December 17, 2015
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
  • Patent number: 9153276
    Abstract: 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: Grant
    Filed: July 30, 2013
    Date of Patent: October 6, 2015
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
  • Patent number: 9082440
    Abstract: 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: Grant
    Filed: July 23, 2012
    Date of Patent: July 14, 2015
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya Dufresne, Xuan Zheng, Dongming Liu
  • Patent number: 9030773
    Abstract: 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: Grant
    Filed: September 15, 2014
    Date of Patent: May 12, 2015
    Assignee: Seagate Technology LLC
    Inventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
  • Publication number: 20150036469
    Abstract: 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: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, Zoran Jandric
  • Publication number: 20150003223
    Abstract: 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: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
  • Patent number: 8873352
    Abstract: 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: Grant
    Filed: March 12, 2014
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Zoran Jandric, Chris Rea, Pierre Asselin, Michael Thomas Johnson, Manuel Charles Anaya-Dufresne, John C. Duda
  • Patent number: 8837071
    Abstract: 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: Grant
    Filed: March 12, 2013
    Date of Patent: September 16, 2014
    Assignee: Seagate Technology LLC
    Inventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
  • Patent number: 8681455
    Abstract: A slider includes a leading edge, a trailing edge, a transducer adjacent to the trailing edge, and an air bearing surface. The air bearing surface includes a forward pad, a rearward pad, and a center rail pad feature disposed along a longitudinal axis of the slider. The center rail pad feature includes a first shallow recess finger and a second shallow recess finger diverging from the longitudinal axis toward the trailing edge.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: March 25, 2014
    Assignee: Seagate Technology LLC
    Inventors: Anil Junuthula Reddy, Manuel Charles Anaya Dufresne
  • Publication number: 20140023108
    Abstract: 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: Application
    Filed: July 23, 2012
    Publication date: January 23, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Thomas Johnson, Manuel Charles Anaya Dufresne, Xuan Zheng, Dongming Liu
  • Publication number: 20130286805
    Abstract: 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: Application
    Filed: March 12, 2013
    Publication date: October 31, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Declan Macken, James Dillon Kiely, Manuel Charles Anaya-Dufresne
  • Publication number: 20120281318
    Abstract: A slider includes a leading edge, a trailing edge, a transducer adjacent to the trailing edge, and an air bearing surface. The air bearing surface includes a forward pad, a rearward pad, and a center rail pad feature disposed along a longitudinal axis of the slider. The center rail pad feature includes a first shallow recess finger and a second shallow recess finger diverging from the longitudinal axis toward the trailing edge.
    Type: Application
    Filed: May 2, 2011
    Publication date: November 8, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Anil Junuthula Reddy, Manuel Charles Anaya Dufresne