Patents by Inventor Patrick Joseph Ryan
Patrick Joseph Ryan 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: 8520344Abstract: A magnetoresistive device includes a free layer, a separating layer, a pinned layer, and a magnetic stabilizer in close proximity to the pinned layer, wherein the magnetic stabilizer may enhance the stability of the magnetization direction of the pinned layer.Type: GrantFiled: April 26, 2012Date of Patent: August 27, 2013Assignee: Seagate Technology LLCInventors: Song Sheng Xue, Paul Edward Anserson, Konstantin Rudolfovich Nikolaev, Patrick Joseph Ryan
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Publication number: 20120206839Abstract: A magnetoresistive device includes a free layer, a separating layer, a pinned layer, and a magnetic stabilizer in close proximity to the pinned layer, wherein the magnetic stabilizer may enhance the stability of the magnetization direction of the pinned layer.Type: ApplicationFiled: April 26, 2012Publication date: August 16, 2012Applicant: SEAGATE TECHNOLOGY LLCInventors: Song Sheng Xue, Paul Edward Anderson, Konstantin Rudolfovich Nikolaev, Patrick Joseph Ryan
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Patent number: 8184409Abstract: A magnetoresistive device includes a free layer, a separating layer, a pinned layer, and a magnetic stabilizer in close proximity to the pinned layer, wherein the magnetic stabilizer may enhance the stability of the magnetization direction of the pinned layer.Type: GrantFiled: October 5, 2010Date of Patent: May 22, 2012Assignee: Seagate Technology LLCInventors: Song Sheng Xue, Paul Edward Anderson, Konstantin Rudolfovich Nikolaev, Patrick Joseph Ryan
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Publication number: 20110019314Abstract: A magnetoresistive device includes a free layer, a separating layer, a pinned layer, and a magnetic stabilizer in close proximity to the pinned layer, wherein the magnetic stabilizer may enhance the stability of the magnetization direction of the pinned layer.Type: ApplicationFiled: October 5, 2010Publication date: January 27, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Song Sheng Xue, Paul Edward Anderson, Konstantin Rudolfovich Nikolaev, Patrick Joseph Ryan
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Patent number: 7835116Abstract: A magnetoresistive stack includes a free layer, a separating layer, a pinned layer, and a magnetic stabilizer in close proximity to the pinned layer such that such that the magnetic stabilizer enhances the stability of the magnetization direction of the pinned layer.Type: GrantFiled: September 9, 2005Date of Patent: November 16, 2010Assignee: Seagate Technology LLCInventors: Song Sheng Xue, Paul Edward Anderson, Konstantin Rudolfovich Nikolaev, Patrick Joseph Ryan
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Patent number: 7684150Abstract: The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape.Type: GrantFiled: June 30, 2004Date of Patent: March 23, 2010Assignee: Seagate Technology LLCInventors: Taras Grigoryevich Pokhil, Nurul Amin, Steven Paul Bozeman, Steven Albert Kalderon, Andrzej Adam Stankiewicz, Ned Tabat, Pu-Ling Lu, Johannes Van Ek, Janusz Jozef Nowak, Patrick Joseph Ryan
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Publication number: 20080174906Abstract: In general, the invention is directed to techniques for integrated interconnects with a set of disc drives. The interconnects allow for a set of disc drives to be positioned in an array; for example, as set of disc drives may be stacked to communicate with a device through a single interface of the device. The interconnects may be formed as vias within the housing of the disc drives. Vias may produced using MEMS techniques, e.g., electroplating, as part of the manufacturing processes of the disc drive itself.Type: ApplicationFiled: January 23, 2007Publication date: July 24, 2008Inventors: Alan B. Johnston, Roger L. Hipwell, Bradley J. Ver Meer, John R. Pendray, Steven A. Kalderon, Wayne A. Bonin, Jeffery Kenneth Berkowitz, Hans L. Leuthold, Song Sheng Xue, Nurul Amin, Andrew D. White, Patrick Joseph Ryan
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Publication number: 20080174907Abstract: A micro-electromechanical systems (MEMS) disc drive includes high-precision and integrated components to allow for increased functionality, robustness and reduced size as compared to currently produced disc drives. Integrating multiple subcomponents of the disc drive using batch processing provides low manufacturing costs. Furthermore, using MEMS techniques, new features can be added to disc drives. For example, an environmental control component, an accelerometer and/or a thermometer may be integrated into the housing of the disc drive.Type: ApplicationFiled: January 23, 2007Publication date: July 24, 2008Inventors: Alan B. Johnston, Roger L. Hipwell, Hans L. Leuthold, Song Sheng Xue, Nurul Amin, Andrew D. White, Patrick Joseph Ryan, Bradley J. Ver Meer, John R. Pendray, Steven A. Kalderson, Wayne A. Bonin, Jeffery Kenneth Berkowitz
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Patent number: 7397633Abstract: A recording head for use with a storage medium is provided. The recording head includes a substrate, a magnetic pole, a first magnetic bias structure positioned on a first side of the magnetic pole, and a second magnetic bias structure positioned on a second side of the magnetic pole, Spacer material is positioned between the magnetic pole and the first magnetic bias structure and between the magnetic pole and the second magnetic bias structure.Type: GrantFiled: March 1, 2005Date of Patent: July 8, 2008Assignee: Seagate Technology, LLCInventors: Song Sheng Xue, Mark Thomas Kief, Johannes van Ek, Nural Amin, Olle Gunner Heinonen, Kaizhong Gao, Patrick Joseph Ryan
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Publication number: 20080052932Abstract: The disclosure relates to micro-electromechanical systems (MEMS) and magnetic MEMS sensors. The sensors include a substrate having a surface, a first magnetic field detector positioned on the surface, a second magnetic field detector positioned on the surface proximate to the first magnetic field detector, and a third magnetic field detector positioned on the surface proximate to the first and second magnetic field detectors. Each of the first, second and third magnetic field detector is capable of detecting external magnetic fields that are mutually orthogonal along three directions. In certain embodiments, the magnetic MEMS sensors may be useful as electronic compasses. The disclosure also relates to fabricating a magnetic MEMS device, such as an electronic compass, from or on a single wafer, which includes multiple MEMS sensors.Type: ApplicationFiled: September 1, 2006Publication date: March 6, 2008Inventors: Song Sheng Xue, Patrick Joseph Ryan, Nurul Amin
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Patent number: 6914758Abstract: A magnetoresistive head apparatus includes first and second readers. The first reader is a magnetoresistive reader. The second reader provides electrostatic discharge protection for the first magnetoresistive reader. The second reader can be a second magnetoresistive reader having substantially the same film structure as the first reader. The second reader can also include a phase change thin film, which has high and low resistance states that are changeable using a laser.Type: GrantFiled: June 30, 2003Date of Patent: July 5, 2005Assignee: Seagate Technology LLCInventors: Patrick Joseph Ryan, Song Sheng Xue
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Patent number: 6801410Abstract: A transducing head according to the present invention includes a pair of electrodes, a pair of biasing elements and a magnetoresistive sensor. The magnetoresistive sensor is positioned between the pair of electrodes. The magnetoresistive sensor includes a pair of flux guides and a free layer positioned substantially co-planar with and between the pair of flux guides. The pair of electrodes are for providing a sense current to the free layer in a direction substantially perpendicular to a plane of the free layer. The pair of biasing elements are positioned on opposing sides of the magnetoresistive sensor for providing longitudinal bias to the free layer.Type: GrantFiled: September 19, 2002Date of Patent: October 5, 2004Assignee: Seagate Technology LLCInventors: Song Sheng Xue, Paul E. Anderson, Patrick Joseph Ryan
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Patent number: 6773496Abstract: An ink suitable for application to a heat resistant substrate and firing to fuse the ink to the substrate, the ink being in a form for ink jet printing and including a carrier material; a pigment; a fusible vitreous agent including particles of less than 10 microns in size, and the carrier having a melting point for phase change of the ink. The pigment includes ceramic pigment particles of less than 10 microns in size and the pigment and fusible vitreous agent are combined in the form of ceramic pigment particles. Dispersant is chemisorbed to these particles.Type: GrantFiled: January 15, 2002Date of Patent: August 10, 2004Assignee: Carey Brothers LimitedInventors: Joseph Doyle, Patrick Meagher, Patrick Joseph Ryan, Francois Colrat, Annaik Genson, Stuart Hampshire, Caroline O'Sullivan
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Patent number: 6771472Abstract: The invention provides a magnetic sensor having a first opposing pair and a second opposing pair of resistive elements configured in a Wheatstone bridge, wherein the resistive elements are a synthetic antiferromagnetic giant magnetoresistive sensor having a reference layer and a pinned layer of different thicknesses, wherein the first opposing pair has a net magnetic moment that is opposite to that of the second opposing pair, and wherein the first opposing pair has a thicker reference layer than pinned layer, and the second opposing pair has a thicker pinned layer than reference layer. Other embodiments of the invention have resistive elements that are opposingly bilayer and trilayer synthetic antiferromagnetic giant magnetoresistive sensors, or opposingly synthetic and standard antiferromagnetic giant magnetoresistive sensors.Type: GrantFiled: December 6, 2002Date of Patent: August 3, 2004Assignee: Seagate Technology LLCInventors: Sining Mao, Songsheng Xue, William Vavra, William Jude O'Kane, James Keith Price, Patrick Joseph Ryan
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Publication number: 20040075955Abstract: A magnetoresistive head apparatus includes first and second readers. The first reader is a magnetoresistive reader. The second reader provides electrostatic discharge protection for the first magnetoresistive reader. The second reader can be a second magnetoresistive reader having substantially the same film structure as the first reader. The second reader can also include a phase change thin film, which has high and low resistance states that are changeable using a laser.Type: ApplicationFiled: June 30, 2003Publication date: April 22, 2004Applicant: Seagate Technology LLCInventors: Patrick Joseph Ryan, Song Sheng Xue
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Publication number: 20030223157Abstract: A transducing head according to the present invention includes a pair of electrodes, a pair of biasing elements and a magnetoresistive sensor. The magnetoresistive sensor is positioned between the pair of electrodes. The magnetoresistive sensor includes a pair of flux guides and a free layer positioned substantially co-planar with and between the pair of flux guides. The pair of electrodes are for providing a sense current to the free layer in a direction substantially perpendicular to a plane of the free layer. The pair of biasing elements are positioned on opposing sides of the magnetoresistive sensor for providing longitudinal bias to the free layer.Type: ApplicationFiled: September 19, 2002Publication date: December 4, 2003Applicant: Seagate Technology LLCInventors: Song Sheng Xue, Paul E. Anderson, Patrick Joseph Ryan
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Patent number: 6633459Abstract: The invention is a magnetoresistive recording head including the reader portion that has a top and bottom shield, a first auxiliary electrical connection, a second auxiliary electrical connection, a first auxiliary electrical contact, and a second auxiliary electrical contact, where the first auxiliary electrical connection electrically connects the first auxiliary electrical contact to the top shield, and where the second auxiliary electrical connection electrically connects the second auxiliary electrical contact to the bottom shield.Type: GrantFiled: June 18, 2001Date of Patent: October 14, 2003Assignee: Seagate Technology LLCInventors: Kevin Richard Heim, Clifton H. Chang, Peter Thomas Weyandt, Patrick Joseph Ryan
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Publication number: 20020144627Abstract: An ink suitable for application to a heat resistant substrate and firing to fuse the ink to the substrate, the ink being in a form for ink jet printing and comprises; a carrier material; a pigment; a fusible vitreous agent comprising particles of less than 10 microns in size, and the carrier having a melting point for phase change of the ink. The pigment comprises ceramic pigment particles of less than 10 microns in size and the pigment and fusible vitreous agent are combined in the form of ceramic pigment particles. Dispersant is chemisorbed to these particles.Type: ApplicationFiled: January 15, 2002Publication date: October 10, 2002Inventors: Joseph Doyle, Patrick Meagher, Patrick Joseph Ryan, Francois Colrat, Annaik Genson, Stuart Hampshire, Caroline O'Sullivan
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Patent number: 6449135Abstract: The present invention is a magnetoresistive (MR) sensor (100) that combines the advantages of abutted junction structure and regular overlaid structure. The abutted junction design is used with the soft adjacent layer (SAL) (108) and the overlaid structure is used with the MR element (120). The method of making the MR sensor (100) comprises depositing SAL (108) on top of the gap layer (106) and depositing spacer material (110) on top of the SAL (108). A mask (130) is placed over the central region of the spacer material (110) and SAL (108). The spacer material (110) and SAL (108) are removed in the areas not covered by the mask (130). An underlayer material (112) is deposited in the areas where the SAL (108) and spacer material (110) were removed. A hard-biasing material (114) is deposited on top of the underlayer (112).Type: GrantFiled: November 6, 1998Date of Patent: September 10, 2002Assignee: Seagate Technology LLCInventors: Juren Ding, Song Sheng Xue, Juan Fernandez-deCastro, James Dolejsi, Patrick Joseph Ryan
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Publication number: 20020101689Abstract: The invention includes methods of manufacturing improved spin valve sensors and the resulting sensors. The method includes the step of depositing a spacer layer in an environment containing oxygen. Preferably, the spacer layer is deposited in an environment containing argon and from about 0.5 to 25,000 ppm oxygen. Spin valve sensors of the invention have a spacer layer containing a non-magnetic electrically conductive material and oxygen. Spin valve sensors of the invention can be dual spin valves, bottom pinned spin valves or top pinned spin valves.Type: ApplicationFiled: March 15, 2001Publication date: August 1, 2002Inventors: Xuefei Tang, Song Sheng Xue, Steven Paul Bozeman, Qing He, Patrick Joseph Ryan