Patents by Inventor Taras Grigorievich Pokhil
Taras Grigorievich Pokhil 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: 11875828Abstract: A reader of a magnetic recording head includes a sensor stack, a first side shield and a second side shield disposed on opposite sides of the sensor stack in a cross-track dimension, and a bridge. The bridge is configured to align magnetic moments of the first side shield and the second side shield. The bridge is disposed above the sensor stack relative to a media-facing surface of the magnetic recording head and proximate to the first side shield and the second side shield.Type: GrantFiled: October 13, 2022Date of Patent: January 16, 2024Assignee: Seagate Technology LLCInventors: Victor B Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Publication number: 20230122220Abstract: A reader of a magnetic recording head includes a sensor stack, a first side shield and a second side shield disposed on opposite sides of the sensor stack in a cross-track dimension, and a bridge. The bridge is configured to align magnetic moments of the first side shield and the second side shield. The bridge is disposed above the sensor stack relative to a media-facing surface of the magnetic recording head and proximate to the first side shield and the second side shield.Type: ApplicationFiled: October 13, 2022Publication date: April 20, 2023Applicant: Seagate Technology LLCInventors: Victor B Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 11423929Abstract: A reader includes a bearing surface and a free layer having a front surface that forms a portion of the bearing surface. The reader also includes a synthetic antiferromagnetic (SAF) structure below the free layer, the SAF structure has a narrow portion with a front surface that forms a portion of the bearing surface and a wide portion behind the narrow portion. The reader further includes an antiferromagnetic (AFM) layer in contact with the wide portion of the SAF structure. The SAF structure is configured to prevent switching from one magnetic state to another magnetic state in the wide portion under thermal fluctuations.Type: GrantFiled: August 3, 2021Date of Patent: August 23, 2022Assignee: Seagate Technology LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Andrzej Adam Stankiewicz, Mohammed Shariat Ullah Patwari
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Patent number: 11393494Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: GrantFiled: January 28, 2021Date of Patent: July 19, 2022Assignee: Seagate Technology LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Publication number: 20210151072Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: ApplicationFiled: January 28, 2021Publication date: May 20, 2021Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 11004466Abstract: A recording head that includes a reader having a front end at a bearing surface of the recording head and a rear end behind the bearing surface. The reader has a non-rectangular shape with a front-end width that is less than an average width of the reader. A first bias element is positioned proximate to a first side of the reader, and a second bias element is positioned proximate to a second side of the reader. Each of the first and second bias elements has a bias level that is a function of a ratio of the front-end width to the average width of the reader.Type: GrantFiled: February 25, 2020Date of Patent: May 11, 2021Assignee: Seagate Technology LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari, Yonghua Chen
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Patent number: 10943612Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: GrantFiled: March 10, 2020Date of Patent: March 9, 2021Assignee: Seagate Technology LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Publication number: 20200211586Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: ApplicationFiled: March 10, 2020Publication date: July 2, 2020Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 10614840Abstract: A recording head that includes a reader having a front end at a bearing surface of the recording head and a rear end behind the bearing surface. The reader has a non-rectangular shape with a front-end width that is less than an average width of the reader. A first bias element is positioned proximate to a first side of the reader, and a second bias element is positioned proximate to a second side of the reader. Each of the first and second bias elements has a bias level that is a function of a ratio of the front-end width to the average width of the reader.Type: GrantFiled: November 1, 2017Date of Patent: April 7, 2020Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari, Yonghua Chen
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Patent number: 10614838Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: GrantFiled: August 23, 2018Date of Patent: April 7, 2020Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Publication number: 20200066301Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.Type: ApplicationFiled: August 23, 2018Publication date: February 27, 2020Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 10453480Abstract: A method of forming a read head. The method includes forming first and second read sensors. A first read measurement is performed on a storage medium using the first read sensor. A second read measurement is performed on the storage medium using the second read sensor. Based on a comparison of the first and second read measurements to a predetermined quantity, either the first read sensor or the second read sensor is selected to be operational in a data storage device.Type: GrantFiled: May 15, 2018Date of Patent: October 22, 2019Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Mohammed Shariat Ullah Patwari, Jason B Gadbois, Taras Grigorievich Pokhil
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Patent number: 10453481Abstract: A method of forming a read head. The method includes forming first and second read sensors that are substantially trapezoidal in shape. A first read measurement is performed on a storage medium using the first read sensor. A second read measurement is performed on the storage medium using the second read sensor. Based on a comparison of the first and second read measurements to a predetermined quantity, either the first read sensor or the second read sensor is selected to be operational in a data storage device.Type: GrantFiled: August 6, 2018Date of Patent: October 22, 2019Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Publication number: 20190051320Abstract: A method of forming a read head. The method includes forming first and second read sensors that are substantially trapezoidal in shape. A first read measurement is performed on a storage medium using the first read sensor. A second read measurement is performed on the storage medium using the second read sensor. Based on a comparison of the first and second read measurements to a predetermined quantity, either the first read sensor or the second read sensor is selected to be operational in a data storage device.Type: ApplicationFiled: August 6, 2018Publication date: February 14, 2019Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 10049690Abstract: A method of forming a read head. The method includes forming first and second read sensors that are substantially trapezoidal in shape. A first read measurement is performed on a storage medium using the first read sensor. A second read measurement is performed on the storage medium using the second read sensor. Based on a comparison of the first and second read measurements to a predetermined quantity, either the first read sensor or the second read sensor is selected to be operational in a data storage device.Type: GrantFiled: August 8, 2017Date of Patent: August 14, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
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Patent number: 9990941Abstract: A method of forming a read head. The method includes forming first and second read sensors. A first read measurement is performed on a storage medium using the first read sensor. A second read measurement is performed on the storage medium using the second read sensor. Based on a comparison of the first and second read measurements to a predetermined quantity, either the first read sensor or the second read sensor is selected to be operational in a data storage device.Type: GrantFiled: November 14, 2016Date of Patent: June 5, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Victor Sapozhnikov, Mohammed Shariat Ullah Patwari, Jason B Gadbois, Taras Grigorievich Pokhil
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Patent number: 8741389Abstract: A method of creating a stack having multiple layers of material deposited onto a substrate. The method includes controlling atom mobility to provide a uniform thickness for the deposited layers and increasing or decreasing a deposition temperature to control the atom mobility and/or roughness for the deposited layers. In an illustrated embodiment, the deposition temperature is increased to increase the atom mobility and the deposition temperature is decreased to decrease the atom mobility to control roughness and provide a uniform layer thickness. In another embodiment, the deposition temperature is increased or decreased for different portions of a layer. As described, a first amount of a material is deposited at a first deposition temperature to provide an optimum surface interface with a prior layer and a second amount of the material is deposited at a second deposition temperature to provide a uniform layer thickness.Type: GrantFiled: June 17, 2009Date of Patent: June 3, 2014Assignee: Seagate Technology LLCInventors: Victor Boris Sapozhnikov, Taras Grigorievich Pokhil, Konstantin Nikolaev
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Publication number: 20100323100Abstract: A method of creating a stack having multiple layers of deposited film onto a substrate is discussed. The method includes depositing a first layer of a first material onto the substrate and depositing a second layer onto the first layer. Depositing the second layer includes depositing a first amount of the second material onto the first layer at a first deposition temperature selected to set the normalized diffusion activation energy of the second material.Type: ApplicationFiled: June 17, 2009Publication date: December 23, 2010Applicant: SEAGATE TECHNOLOGY LLCInventors: Victor Boris Sapozhnikov, Taras Grigorievich Pokhil, Konstantin Nikolaev
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Patent number: 6714389Abstract: A magnetoresistive sensor for sensing a magnetic storage medium includes a free layer that has a magnetic anisotropy that supports stable magnetic states. A magnetic field generator biases the stable states of the free layer. The magnetic field generator may permanently bias the free layer through the use of permanent magnets or may intermittently bias the free layer with a magnetic field generated by an alternating current. A magnetic storage medium is located proximate to the magnetoresistive sensor. The magnetoresistive sensor switches between stable magnetic states in response to the data on the magnetic storage medium. The magnetoresistive sensor senses the data stored in sectors on a magnetic medium by magnetically biasing the free layer, positioning the sensor proximate to a sector of the magnetic medium to be sensed, removing the magnetic bias and then sensing the magnetic state of the free layer while the magnetic bias is removed.Type: GrantFiled: October 30, 2001Date of Patent: March 30, 2004Assignee: Seagate Technology LLCInventors: Taras Grigorievich Pokhil, Andrzej A. Stankiewicz, Janusz J. Nowak
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Patent number: 6556388Abstract: A Vertical Giant Magnetoresistive Sensor (VGMR) with two VGMR structures (61 A, 61 B), each responding differently to an external magnetic field, producing a differential signal proportional to the field. The magnetizations (M1, M1′, M2, M2′) in each of the sensors are oriented antiparallel. The antiparallel magnetization is attained by altering the magnetic compositions of the two structures, or adding an additional structure such as a permanent magnet or current strip (11) between the VGMR structures.Type: GrantFiled: July 13, 2000Date of Patent: April 29, 2003Assignee: Seagate Technology LLCInventors: Brenda Anne Everitt, Taras Grigorievich Pokhil