Patents by Inventor Jiaoming Qiu
Jiaoming Qiu 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: 11710504Abstract: A heat-assisted magnetic recording head includes a near-field emitter and a middle disk. The near-field emitter includes a peg and an anchor disk. The peg is configured to produce a hot spot on a proximal magnetic disk. The peg is disposed proximal to a media-facing surface of the heat-assisted magnetic recording head. The anchor disk is disposed behind the peg relative to the media-facing surface. The middle disk has a melting temperature of at least 1500 degrees Celsius. The middle disk is disposed in a down-track direction relative to the near-field emitter and is coupled to the anchor disk.Type: GrantFiled: March 16, 2022Date of Patent: July 25, 2023Assignee: SEAGATE TECHNOLOGY LLCInventors: Tae-Woo Lee, Jiaoming Qiu
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Patent number: 11657844Abstract: A heat-assisted magnetic recording head includes a near-field transducer and a heat sink. The near-field transducer includes a middle disk and a near-field emitter. The near-field emitter includes a peg and an anchor disk. The peg is configured to produce a hot spot on a proximal magnetic disk. The peg is disposed proximal to a media-facing surface of the heat-assisted magnetic recording head. The anchor disk is disposed behind the peg relative to the media-facing surface. The heat sink includes a core and a liner. The core includes a primary metal, and the liner includes a primary metal. The liner is coupled to the core and is disposed along an outer surface of the core. The middle disk is disposed between and coupled to the liner and the anchor disk. The primary metal of the liner comprises at least one of iridium, rhodium, tantalum, tungsten, or ruthenium.Type: GrantFiled: March 15, 2022Date of Patent: May 23, 2023Assignee: Seagate Technology LLCInventors: Tae-Woo Lee, Jiaoming Qiu
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Publication number: 20200003767Abstract: Methods, systems and programing for substance detection with a magnetic sensor are presented. In one example, a magnetic sensor having one or more layers is formed on a base for sensing a magnetic field created by magnetic particles present in proximity to the magnetic sensor. A first end of each of a first set of strands is immobilized with respect to the magnetic sensor. A magnetic particle is attached to a second end of each of the first set of strands so that when a material containing a substance is in contact with the base, the substance causes at least some of the first set of strands to break resulting in that the magnetic particle attached to the second end of each of the at least some of the first set of strands is no longer in proximity to the magnetic sensor.Type: ApplicationFiled: June 28, 2019Publication date: January 2, 2020Inventor: Jiaoming Qiu
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Patent number: 9922671Abstract: A write head having a main pole, a gap layer, and at least two sacrificial layers. In accordance with one embodiment, a method includes depositing a non-magnetic gap layer of material above a main pole layer of magnetic material; depositing a sacrificial layer of material above the non-magnetic gap layer of material; etching a portion of the sacrificial layer of material while not entirely removing the sacrificial layer of material; and depositing additional sacrificial material to the etched sacrificial layer.Type: GrantFiled: November 23, 2015Date of Patent: March 20, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Wei Tian, Venkateswara Rao Inturi, Dong Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9899050Abstract: One embodiment described herein is directed to a method involving depositing a seed layer on a substrate, the seed layer comprising A1 phase FePt with a ratio of Pt of Fe greater than 1:1. A main layer is deposited on the seed layer, the main layer comprising A1 phase FePt with a ratio of Pt to Fe of approximately 1:1. A cap layer is deposited on the main layer, the cap layer comprising A1 phase FePt with a ratio of Pt to Fe of less than 1:1. The seed, main and cap layers are annealed to convert the A1 phase FePt to L10 phase FePt having a graded FePt structure of varying stoichimetry from approximately Fe50Pt50 adjacent a lower portion of the structure proximate the substrate to Fe>50Pt<50 adjacent an upper portion of the structure opposite the lower portion.Type: GrantFiled: December 12, 2016Date of Patent: February 20, 2018Assignee: Seagate Technology LLCInventors: Jiaoming Qiu, Yonghua Chen, Ganping Ju, Thomas P. Nolan
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Patent number: 9761252Abstract: An apparatus has a main pole layer of magnetic material, a second layer of magnetic material, a first gap layer of non-magnetic material between the main pole layer and the second layer of magnetic material, and a second gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material. The second gap layer of non-magnetic material can be directly adjacent to the second layer of magnetic material. In accordance with one embodiment, this allows the gap to serve as a non-magnetic seed for the second layer of magnetic material. A method of manufacturing such a device is also described.Type: GrantFiled: August 28, 2015Date of Patent: September 12, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Wei Tian, Venkateswara Rao Inturi, Dong Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9384769Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.Type: GrantFiled: September 28, 2015Date of Patent: July 5, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Jiaoming Qiu, Lei Lu, Xuelian Xu
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Patent number: 9372242Abstract: A magnetometer with a set/reset coil having portions that cross portions of sensing strips at an angle in order to create a magnetic field in the sensing strip that is at an angle with respect to the easy axis of magnetization of the sensing strip. Each sensing strip may have a portion having a magnetic field created therein that is different from a magnetic field created in another portion of the same sensing strip. As a result, a lower set/reset coil current is needed to initialize the magnetometer.Type: GrantFiled: May 9, 2013Date of Patent: June 21, 2016Assignee: MEMSIC, INC.Inventors: Jiaoming Qiu, Yongyao Cai
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Publication number: 20160133290Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.Type: ApplicationFiled: September 28, 2015Publication date: May 12, 2016Inventors: Jiaoming Qiu, Lei Lu, Xuelian Xu
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Publication number: 20160078887Abstract: In accordance with one embodiment, a method may be implemented by depositing a non-magnetic gap layer of material above a main pole layer of magnetic material; depositing a sacrificial layer of material above the non-magnetic gap layer of material; etching a portion of the sacrificial layer of material while not entirely removing the sacrificial layer of material; and depositing additional sacrificial material to the etched sacrificial layer.Type: ApplicationFiled: November 23, 2015Publication date: March 17, 2016Inventors: Wei Tian, Venkateswara Rao Inturi, Dong Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9286918Abstract: A write head having a main pole having a pole tip proximate an air bearing surface (ABS), the main pole having a leading side and a trailing side. The write head also includes a yoke having a yoke tip recessed from the ABS, and a helical coil wrapped around the main pole and the yoke. The helical coil has a first turn with its front edge at least substantially aligned with the yoke tip.Type: GrantFiled: July 14, 2015Date of Patent: March 15, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Jianhua Xue, Jiaoming Qiu, Kirill Rivkin, Huaqing Yin, John Wolf, Yonghua Chen
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Publication number: 20160064018Abstract: A write head having a main pole having a pole tip proximate an air bearing surface (ABS), the main pole having a leading side and a trailing side. The write head also includes a yoke having a yoke tip recessed from the ABS, and a helical coil wrapped around the main pole and the yoke. The helical coil has a first turn with its front edge at least substantially aligned with the yoke tip.Type: ApplicationFiled: July 14, 2015Publication date: March 3, 2016Inventors: Jianhua Xue, Jiaoming Qiu, Kirill Rivkin, Huaqing Yin, John Wolf, Yonghua Chen
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Publication number: 20160011182Abstract: Methods, systems and programing for substance detection with a magnetic sensor are presented. In one example, a magnetic sensor having one or more layers is formed on a base for sensing a magnetic field created by magnetic particles present in proximity to the magnetic sensor. A first end of each of a first set of strands is immobilized with respect to the magnetic sensor. A magnetic particle is attached to a second end of each of the first set of strands so that when a material containing a substance is in contact with the base, the substance causes at least some of the first set of strands to break resulting in that the magnetic particle attached to the second end of each of the at least some of the first set of strands is no longer in proximity to the magnetic sensor.Type: ApplicationFiled: June 15, 2015Publication date: January 14, 2016Applicant: Zepto Life Technology, LLCInventor: Jiaoming Qiu
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Publication number: 20150371668Abstract: An apparatus has a main pole layer of magnetic material, a second layer of magnetic material, a first gap layer of non-magnetic material between the main pole layer and the second layer of magnetic material, and a second gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material. The second gap layer of non-magnetic material can be directly adjacent to the second layer of magnetic material. In accordance with one embodiment, this allows the gap to serve as a non-magnetic seed for the second layer of magnetic material. A method of manufacturing such a device is also described.Type: ApplicationFiled: August 28, 2015Publication date: December 24, 2015Inventors: Wei Tian, Venkateswara Rao Inturi, Dong Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9214167Abstract: In accordance with one embodiment, an apparatus may be implemented that comprises a main pole layer of magnetic material, a non-magnetic gap layer of material above the main pole layer, an etched first sacrificial layer of material above the non-magnetic gap layer of material, and a second sacrificial layer of material above the etched first sacrificial layer of material.Type: GrantFiled: March 12, 2013Date of Patent: December 15, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Wei Tian, Venkateswara Rao Inturi, Doug Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9171557Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.Type: GrantFiled: November 7, 2014Date of Patent: October 27, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Jiaoming Qiu, Lei Lu, Xuelian Xu
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Patent number: 9159340Abstract: A write head having a main pole having a pole tip, the main pole having a leading side and a trailing side; and a coil structure around the main pole, the coil structure having no more than two active turns on the trailing side. A non-active, or dummy turn, may be present.Type: GrantFiled: August 28, 2014Date of Patent: October 13, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Jiaoming Qiu, Jianhua Xue, Kevin Heim, Kirill Rivkin, Huaqing Yin, John Wolf, Yonghua Chen
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Patent number: 9147407Abstract: In accordance with one embodiment, an apparatus includes a main pole layer of magnetic material; a second layer of magnetic material; a first gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material; a second gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material; wherein the second gap layer of non-magnetic material is disposed directly adjacent to the second layer of magnetic material. In accordance with one embodiment, this allows the gap to serve as a non-magnetic seed for the second layer of magnetic material. A method of manufacturing such a device is also described.Type: GrantFiled: March 12, 2013Date of Patent: September 29, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Wei Tian, Venkateswara Rao Inturi, Doug Lin, Huaqing Yin, Jiaoming Qiu
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Patent number: 9116198Abstract: A multi-axis GMR or TGMR based magnetic field sensor system is disclosed. Preferably a three axis sensor system is provided for sensing magnetic flux along three mutually orthogonal axes, which can be used for magnetic compass or other magnetic field sensing applications. The sensing units are operative to sense X and Y axis magnetic flux signals in the device (XY) plane, while Z axis sensitivity is achieved by use of a continuous ring shaped or octagonal magnetic concentrator that is adapted to convert the Z axis magnetic flux signal into magnetic flux signals in the XY plane.Type: GrantFiled: January 14, 2013Date of Patent: August 25, 2015Assignee: MEMSIC, INC.Inventors: Yongyao Cai, Jiaoming Qiu, Leyue Jiang
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Patent number: 9082428Abstract: A write head having a main pole having a pole tip proximate an air bearing surface (ABS), the main pole having a leading side and a trailing side. The write head also includes a yoke having a yoke tip recessed from the ABS, and a helical coil wrapped around the main pole and the yoke. The helical coil has a first turn with its front edge at least substantially aligned with the yoke tip.Type: GrantFiled: August 28, 2014Date of Patent: July 14, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Jianhua Xue, Jiaoming Qiu, Kirill Rivkin, Huaqing Yin, John Wolf, Yonghua Chen