Patents by Inventor Andrzej Adam Stankiewicz

Andrzej Adam Stankiewicz 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).

  • Reader with wide synthetic antiferromagnetic structure optimized for high stability and low noise
    Patent number: 11423929
    Abstract: 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: Grant
    Filed: August 3, 2021
    Date of Patent: August 23, 2022
    Assignee: Seagate Technology LLC
    Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Andrzej Adam Stankiewicz, Mohammed Shariat Ullah Patwari
  • Mitigation of noise generated by random excitation of asymmetric oscillation modes
    Patent number: 10615887
    Abstract: An apparatus and method for mitigating noise in a waveform from a signal-producing device. The method includes receiving the waveform from the signal-producing device, and decomposing the waveform into low frequency (LF) and high frequency (HF) components. The method also includes determining an instant amplitude of the HF component, and employing the instant amplitude of the HF component and possibly the LF component to obtain a noise correction value for the LF component. The method further includes adding the obtained noise correction value to the LF component to obtain an output signal.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: April 7, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Andrzej Adam Stankiewicz, Scott Wilson Stokes, Krishnan Subramanian
  • MITIGATION OF NOISE GENERATED BY RANDOM EXCITATION OF ASYMMETRIC OSCILLATION MODES
    Publication number: 20200099456
    Abstract: An apparatus and method for mitigating noise in a waveform from a signal-producing device. The method includes receiving the waveform from the signal-producing device, and decomposing the waveform into low frequency (LF) and high frequency (HF) components. The method also includes determining an instant amplitude of the HF component, and employing the instant amplitude of the HF component and possibly the LF component to obtain a noise correction value for the LF component. The method further includes adding the obtained noise correction value to the LF component to obtain an output signal.
    Type: Application
    Filed: September 24, 2018
    Publication date: March 26, 2020
    Inventors: Andrzej Adam Stankiewicz, Scott Wilson Stokes, Krishnan Subramanian
  • Recording head for reducing side track erasure
    Patent number: 7684150
    Abstract: 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: Grant
    Filed: June 30, 2004
    Date of Patent: March 23, 2010
    Assignee: Seagate Technology LLC
    Inventors: 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