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公开(公告)号：US10468055B1
公开(公告)日：2019-11-05
申请号：US15800846
申请日：2017-11-01
Applicant: Seagate Technology LLC
Abstract: A multi-sensor reader includes first and second read sensors. The first read sensor includes a first sensor stack including a sensing layer having a magnetization that changes according to an external magnetic field, and a first biasing component configured to magnetically bias the sensing layer of the first sensor stack in a first direction. The second read sensor includes a second sensor stack including a sensing layer having a magnetization that changes according to an external magnetic field, and a second biasing component configured to magnetically bias the sensing layer of the second sensor stack in a second direction that is substantially opposite the first direction.
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公开(公告)号：US20200099456A1
公开(公告)日：2020-03-26
申请号：US16139364
申请日：2018-09-24
Applicant: Seagate Technology LLC
Inventor： Andrzej Adam Stankiewicz , Scott Wilson Stokes , Krishnan Subramanian
IPC: H04B15/02 , H04B15/00 , H04B17/14 , H04B17/345
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.
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公开(公告)号：US09659586B1
公开(公告)日：2017-05-23
申请号：US14939647
申请日：2015-11-12
Applicant: Seagate Technology LLC
IPC: G11B5/39
CPC classification number: G11B5/3932 , G11B5/3906 , G11B5/3912 , G11B5/398 , H01F10/3254 , H01F10/3272 , H01L43/08 , H01L43/12
Abstract: A read sensor that includes an unbalanced synthetic antiferromagnetic (SAF) free layer structure. The unbalanced SAF free layer structure includes a first magnetic layer having a first magnetic moment value and a second magnetic layer having a second magnetic moment value that is different from the first magnetic moment value. A separation layer is included between the first magnetic layer and the second magnetic layer. The first magnetic layer and the second magnetic layer are antiferromagnetically coupled.
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Patent Agency Ranking
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：US09886974B2
公开(公告)日：2018-02-06
申请号：US14927696
申请日：2015-10-30
Applicant: Seagate Technology LLC
Inventor： Scott Wilson Stokes , Victor Boris Sapozhnikov
CPC classification number: G11B5/3912 , G11B5/112 , G11B5/1475 , G11B5/3932 , G11B5/398 , G11B5/6082
Abstract: A reader having a bearing surface, a free layer, and a free layer biasing structure. The free layer biasing structure includes at least one side shield that applies a first bias field level to a front portion of the free layer that is nearest to the bearing surface and applies a second bias field level to a rear portion of the free layer that is farthest from the bearing surface. The second bias field level is greater than the first bias field level.
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公开(公告)号：US20170140781A1
公开(公告)日：2017-05-18
申请号：US14939647
申请日：2015-11-12
Applicant: Seagate Technology LLC
IPC: G11B5/39
CPC classification number: G11B5/3932 , G11B5/3906 , G11B5/3912 , G11B5/398 , H01F10/3254 , H01F10/3272 , H01L43/08 , H01L43/12
Abstract: A read sensor that includes an unbalanced synthetic antiferromagnetic (SAF) free layer structure. The unbalanced SAF free layer structure includes a first magnetic layer having a first magnetic moment value and a second magnetic layer having a second magnetic moment value that is different from the first magnetic moment value. A separation layer is included between the first magnetic layer and the second magnetic layer. The first magnetic layer and the second magnetic layer are antiferromagnetically coupled.
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公开(公告)号：US20170125046A1
公开(公告)日：2017-05-04
申请号：US14927696
申请日：2015-10-30
Applicant: Seagate Technology LLC
Inventor： Scott Wilson Stokes , Victor Boris Sapozhnikov
CPC classification number: G11B5/3912 , G11B5/112 , G11B5/1475 , G11B5/3932 , G11B5/398 , G11B5/6082
Abstract: A reader having a bearing surface, a free layer, and a free layer biasing structure. The free layer biasing structure includes at least one side shield that applies a first bias field level to a front portion of the free layer that is nearest to the bearing surface and applies a second bias field level to a rear portion of the free layer that is farthest from the bearing surface. The second bias field level is greater than the first bias field level.
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公开(公告)号：US20140168818A1
公开(公告)日：2014-06-19
申请号：US13720712
申请日：2012-12-19
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Victor Boris Sapozhnikov , Scott Wilson Stokes , Jae-Young Yi , Mohammed Shariat Ullah Patwari , Yonghua Chen
IPC: G11B5/147
CPC classification number: G11B5/3909 , G11B5/3932
Abstract: Implementations described and claimed herein provide a read sensor structure having a synthetic anti-ferromagnetic (SAF) structure with a pinning that is canted with respect to an air bearing surface (ABS) of the read sensor. In an implementation of the read sensor, the angle between the pinning direction of a reference layer (RL) and the pinning direction of a free layer (FL) is obtuse.
Abstract translation: 本文描述和要求保护的实施例提供了具有合成反铁磁（SAF）结构的读取传感器结构，其具有相对于读取传感器的空气轴承表面（ABS）倾斜的钉扎。 在读取传感器的实现中，参考层（RL）的钉扎方向与自由层（FL）的钉扎方向之间的角度是钝的。
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