Patents by Inventor Kirill A. Rivkin
Kirill A. Rivkin 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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Publication number: 20230168860Abstract: A magnetic processing unit (“MPU”) includes a magnetic element with one or more input channels and one or more output channels. The magnetic element can acquire magnetic arrangement configured to perform a predetermined operation on the received input signal and provide a resulting output signal.Type: ApplicationFiled: January 31, 2023Publication date: June 1, 2023Applicant: RKMAG CORPORATIONInventor: Kirill RIVKIN
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Patent number: 11593636Abstract: A machine learning system and method. The machine learning system includes at least one computation circuit that performs a weighted summation of incoming signals and provides a resulting signal. The weighted summation is carried out at least in part by a magnetic element in which weights are adjusted based on changes in effective magnetic susceptibility of the magnetic element.Type: GrantFiled: January 3, 2019Date of Patent: February 28, 2023Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill A. Rivkin, Javier Guzman, Mourad Benakli
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Patent number: 11568889Abstract: A magnetic processing unit (“MPU”) includes a magnetic element with one or more input channels and one or more output channels. The magnetic element can acquire magnetic arrangement configured to perform a predetermined operation on the received input signal and provide a resulting output signal.Type: GrantFiled: July 21, 2020Date of Patent: January 31, 2023Assignee: RKMAG CORPORATIONInventor: Kirill Rivkin
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Publication number: 20220270639Abstract: A magnetic processing unit (“MPU”) includes a magnetic element with one or more input channels and one or more output channels. The magnetic element can acquire magnetic arrangement configured to perform a predetermined operation on the received input signal and provide a resulting output signal.Type: ApplicationFiled: July 21, 2020Publication date: August 25, 2022Applicant: RKMAG CORPORATIONInventor: Kirill RIVKIN
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Patent number: 10770096Abstract: A recording head includes a bearing surface, a first writer and a first shield structure for the first writer. The recording head also includes a second writer and a second shield structure for the second writer. The recording head further includes a magnetic bridge connecting the first shield structure to the second shield structure at the bearing surface.Type: GrantFiled: February 12, 2019Date of Patent: September 8, 2020Assignee: SEAGATE TECHNOLOGY LLCInventors: Wei Tian, Javier Guzman, Jianhua Xue, Kirill Rivkin, Jian Zhong, Lei Lu
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Patent number: 10699733Abstract: A write head including a bearing surface and a write pole having a front surface that forms a portion of the bearing surface. The front surface has a leading edge, a trailing edge and side edges connecting the leading and trailing edges. The write head also includes side shields proximate to the side edges of the write pole, and a trailing shield over the write pole and the side shields. A trailing shield-write pole gap is present between the trailing edge and the trailing shield, and a trailing shield-side shield gap is present between the trailing shield and the side shields. The trailing shield-shield shield gap is substantially less than the trailing shield-write pole gap.Type: GrantFiled: October 30, 2018Date of Patent: June 30, 2020Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill A. Rivkin, Wei Tian, XiaoHong Zhang, Yi Liu
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Patent number: 10210887Abstract: Systems and methods for a providing a chirped current profile with an undershoot for a channel preamplifier are described. A method for writing bits in a magnetic recording disc may include applying an overshoot to a write current which is supplied to a magnetic writer of the magnetic recording disc and applying an undershoot to the write current after the overshoot is applied to at least partially de-saturate the magnetic writer. The method may also include writing a bit to the magnetic recording disc with the magnetic writer using the supplied write current. In some examples, the application of a short negative pulse after an overshoot portion of the write current waveform is delivered to the head during a write operation that writes the bit to the magnetic recording disc.Type: GrantFiled: April 19, 2018Date of Patent: February 19, 2019Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill A. Rivkin, Mourad Benakli, Todd M. Lammers, Ralph William Cross
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Patent number: 10141014Abstract: A write head including a bearing surface and a write pole having a front surface that forms a portion of the bearing surface. The front surface has a leading edge, a trailing edge and side edges connecting the leading and trailing edges. The write head also includes side shields proximate to the side edges of the write pole, and a trailing shield over the write pole and the side shields. A trailing shield-write pole gap is present between the trailing edge and the trailing shield, and a trailing shield-side shield gap is present between the trailing shield and the side shields. The trailing shield side shield gap is substantially less than the trailing shield-write pole gap.Type: GrantFiled: July 28, 2017Date of Patent: November 27, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill A. Rivkin, Wei Tian, XiaoHong Zhang, Yi Liu
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Patent number: 10134428Abstract: A data writer may be constructed and operated as part of a data storage device. The data writer can be positioned proximal a data storage medium. The data writer may have a write pole positioned adjacent a writer coil with the writer coil having a plurality of turns. A controller that is connected to each turn can be adapted to selectively activate less than all the coil turns in response to the data writer being positioned over a first portion of a data storage medium and selectively activate all of the coil turns in response to the data writer being positioned over a second portion of the data storage medium.Type: GrantFiled: October 30, 2017Date of Patent: November 20, 2018Assignee: Seagate Technology LLCInventors: Kirill A. Rivkin, JianHua Xue, Wei Tian, Lei Lu, Jian Zhong
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Patent number: 9978401Abstract: Systems and methods for a providing a chirped current profile with an undershoot for a channel preamplifier are described. A method for writing bits in a magnetic recording disc may include applying an overshoot to a write current which is supplied to a magnetic writer of the magnetic recording disc and applying an undershoot to the write current after the overshoot is applied to at least partially de-saturate the magnetic writer. The method may also include writing a bit to the magnetic recording disc with the magnetic writer using the supplied write current. In some examples, the application of a short negative pulse after an overshoot portion of the write current waveform is delivered to the head during a write operation that writes the bit to the magnetic recording disc.Type: GrantFiled: April 26, 2017Date of Patent: May 22, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill A. Rivkin, Mourad Benakli, Todd M. Lammers, Ralph William Cross
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Patent number: 9922669Abstract: Implementations disclosed and claimed herein include a method of write head core located in a slider, the write head core comprising a first end operative to serve as a write pole, a second end operative to serve as a return pole, wherein the first end comprises a substantially smaller cross-sectional area than the second end, and wherein the write head core has a substantially smooth curvature.Type: GrantFiled: December 28, 2015Date of Patent: March 20, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Kirill Rivkin, Ned Tabat, Mourad Benakli, Michael A. Seigler
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Patent number: 9905251Abstract: Method and apparatus for enhancing write current switching efficiencies during data write operations in a data storage device. In some embodiments, write data are described in the form a sequence of symbols of nT length where T is a channel clock rate and n is an integer over a selected range. Bi-directional write currents are applied to a write element to record the sequence of symbols to a storage medium. The write currents are switched between a first rail current and a second rail current for alternating symbols. The write currents are further transitioned to an intermediate current value for at least one channel clock period immediately preceding a next occurrence of a symbol boundary between an adjacent pair of symbols in the sequence.Type: GrantFiled: February 15, 2016Date of Patent: February 27, 2018Assignee: Seagate Technology LLCInventors: Xiong Liu, Michael R. Montemorra, Ralph W. Cross, Todd M. Lammers, Quan Li, Beng Theam Ko, Kirill Rivkin, Mourad Benakli
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Patent number: 9805744Abstract: The disclosed technology includes a storage device including an interlaced magnetic recording (IMR) system, and a transducer head, including two writers, each writer including a write pole, wherein a width of a first write pole in a cross-track direction is substantially greater than a width of a second write pole in the cross-track direction, and wherein a down-track width of a front shield gap of the first write pole is substantially similar to down-track width of a front shield gap of the second write pole. In another implementation, the storage device includes an IMR system, and a transducer head, including two writers, each writer including a write pole, wherein a width of the first write pole in a cross-track direction is substantially greater than a width of a second write pole in a cross-track direction, and wherein a cross-track width of a side shield gap of the first write pole is substantially similar to a cross-track width of a side shield gap of the second write pole.Type: GrantFiled: April 1, 2016Date of Patent: October 31, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Jianhua Xue, Jian Zhong, Lei Lu, Yan Dong, Kirill Rivkin
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Patent number: 9805742Abstract: A data writer may be constructed and operated as part of a data storage device. The data writer can be positioned proximal a data storage medium. The data writer may have a write pole positioned adjacent a writer coil with the writer coil having a plurality of turns. A controller that is connected to each turn can be adapted to selectively activate less than all the coil turns in response to the data writer being positioned over a first portion of a data storage medium and selectively activate all of the coil turns in response to the data writer being positioned over a second portion of the data storage medium.Type: GrantFiled: February 28, 2017Date of Patent: October 31, 2017Assignee: Seagate Technology LLCInventors: Kirill A. Rivkin, JianHua Xue, Wei Tian, Lei Lu, Jian Zhong
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Publication number: 20170236534Abstract: Method and apparatus for enhancing write current switching efficiencies during data write operations in a data storage device. In some embodiments, write data are described in the form a sequence of symbols of nT length where T is a channel clock rate and n is an integer over a selected range. Bi-directional write currents are applied to a write element to record the sequence of symbols to a storage medium. The write currents are switched between a first rail current and a second rail current for alternating symbols. The write currents are further transitioned to an intermediate current value for at least one channel clock period immediately preceding a next occurrence of a symbol boundary between an adjacent pair of symbols in the sequence.Type: ApplicationFiled: February 15, 2016Publication date: August 17, 2017Inventors: Xiong Liu, Michael R. Montemorra, Ralph W. Cross, Todd M. Lammers, Quan Li, Beng Theam Ko, Kirill Rivkin, Mourad Benakli
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Patent number: 9715888Abstract: A data writer may be configured with at least a write pole continuously extending from an air bearing surface to a via. The write pole can contact at least one yoke that contacts the write pole. The write pole and yoke may each be disposed between and separated from a write coil that has a single turn and continuously extends to opposite sides of the write pole.Type: GrantFiled: April 15, 2016Date of Patent: July 25, 2017Assignee: Seagate Technology LLCInventors: Muhammad Asif Bashir, Kirill A. Rivkin, JianHua Xue, Beverley R. McConnell, Wei Tian
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Patent number: 9704510Abstract: A data writer can have at least a write pole separated from first and second side shields by a continuous dielectric gap layer. Each side shield may have first and second shield sub-layers configured with different magnetic moments that increase relative to the sub-layer's distance from the write pole. The side shields may wrap around a leading tip of the write pole to form a box shield.Type: GrantFiled: September 24, 2015Date of Patent: July 11, 2017Assignee: Seagate Technology LLCInventors: Lei Lu, Kirill Rivkin, Xuelian Xu, Huaqing Yin
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Publication number: 20170092300Abstract: A data writer can have at least a write pole separated from first and second side shields by a continuous dielectric gap layer. Each side shield may have first and second shield sub-layers configured with different magnetic moments that increase relative to the sub-layer's distance from the write pole. The side shields may wrap around a leading tip of the write pole to form a box shield.Type: ApplicationFiled: September 24, 2015Publication date: March 30, 2017Inventors: Lei Lu, Kirill Rivkin, Xuelian Xu, Huaqing Yin
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Patent number: 9595275Abstract: A method of removing a magnetic domain from a slider structure, such as a shield of a write head, in a storage assembly having a storage media. The method includes passing the slider structure in close proximity to a region on the storage media having a magnetic field sufficiently large to remove a magnetic domain in the slider structure.Type: GrantFiled: December 21, 2015Date of Patent: March 14, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Yanzhang Liu, Kirill Rivkin, Lei Lu, Huaqing Yin
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Patent number: 9520148Abstract: Methods of removing a magnetic domain from a slider structure, such as a shield in a write head, in a data storage assembly. The method comprises passing the slider structure in close proximity to a decaying magnetic field of at least 100 Oe and no more than 1500 Oe originating from within the storage assembly. In some implementations the decaying magnetic field has an oscillating polarity.Type: GrantFiled: December 21, 2015Date of Patent: December 13, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Yanzhang Liu, Kirill Rivkin, Lei Lu, Huaqing Yin