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公开(公告)号：US10453481B2
公开(公告)日：2019-10-22
申请号：US16055699
申请日：2018-08-06
Applicant: Seagate Technology LLC
Abstract: 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.
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公开(公告)号：US10453480B1
公开(公告)日：2019-10-22
申请号：US15980042
申请日：2018-05-15
Applicant: Seagate Technology LLC
Inventor： Victor Sapozhnikov , Mohammed Shariat Ullah Patwari , Jason B Gadbois , Taras Grigorievich Pokhil
Abstract: 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.
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公开(公告)号：US20190051320A1
公开(公告)日：2019-02-14
申请号：US16055699
申请日：2018-08-06
Applicant: Seagate Technology LLC
IPC: G11B5/31
Abstract: 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.
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公开(公告)号：US10586562B1
公开(公告)日：2020-03-10
申请号：US15800503
申请日：2017-11-01
Applicant: Seagate Technology LLC
Inventor： Victor Sapozhnikov , Pavol Krivosik , Mohammed Shariat Ullah Patwari , Scott Wilson Stokes
IPC: G11B5/39
Abstract: A hybrid dual reader. The hybrid dual reader includes first and second read sensors with conflicting design characteristics. The first read sensor includes at least one signal-to-noise ratio favoring design characteristic. The second read sensor includes at least one pulse width favoring design characteristic. The at least one signal-to-noise ratio favoring design characteristic is in conflict with the at least one pulse width favoring design characteristic.
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公开(公告)号：US09691417B1
公开(公告)日：2017-06-27
申请号：US14925586
申请日：2015-10-28
Applicant: Seagate Technology LLC
Inventor： Wonjoon Jung , Victor Sapozhnikov
IPC: G11B5/39
CPC classification number: G11B5/3912 , G11B5/3909 , G11B5/3929 , G11B5/3932 , G11B5/398 , G11B2005/3996
Abstract: A reader includes a bearing surface, a sensor stack and a bottom shield below the sensor stack. The bottom shield has a synthetic antiferromagnetic (SAF) structure that includes a first magnetic layer that has a first width at the bearing surface and a second magnetic layer that has a second width at the bearing surface. The second width is less than the first width. The second magnetic layer has a magnetic orientation with at least a component that is substantially orthogonal to the bearing surface.
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Patent Agency Ranking
公开(公告)号：US10783907B1
公开(公告)日：2020-09-22
申请号：US16560649
申请日：2019-09-04
Applicant: Seagate Technology LLC
Inventor： Victor Sapozhnikov , Taras Grigoryevich Pokhil , Mohammed Shariat Ullah Patwari , Shaun Eric McKinlay
Abstract: A reader includes a free layer and a side shield that biases the free layer. The side shield includes a main bias layer having a first magnetic moment value and a first magnetization direction. The side shield also includes a compensation bias layer having a second magnetic moment value that is less than the first magnetic moment value and a second magnetization direction that is opposite to the first magnetization direction.
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公开(公告)号：US20200211586A1
公开(公告)日：2020-07-02
申请号：US16813989
申请日：2020-03-10
Applicant: Seagate Technology LLC
Abstract: 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.
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公开(公告)号：US20200066301A1
公开(公告)日：2020-02-27
申请号：US16110701
申请日：2018-08-23
Applicant: Seagate Technology LLC
IPC: G11B5/39
Abstract: 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.
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9.发明授权公开(公告)号：US11423929B1
公开(公告)日：2022-08-23
申请号：US17392627
申请日：2021-08-03
Applicant: Seagate Technology LLC
Inventor： Victor Sapozhnikov , Taras Grigorievich Pokhil , Andrzej Adam Stankiewicz , Mohammed Shariat Ullah Patwari
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.
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公开(公告)号：US20210151072A1
公开(公告)日：2021-05-20
申请号：US17161126
申请日：2021-01-28
Applicant: Seagate Technology LLC
Abstract: 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.
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