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公开(公告)号：US20190235840A1
公开(公告)日：2019-08-01
申请号：US15884952
申请日：2018-01-31
Applicant: Seagate Technology LLC
Inventor： Li Hong ZHANG , WenXiang XIE , Xiong LIU
Abstract: A method includes detecting noise in a laser output of a heat assisted magnetic recording device. The noise is converted into an electrical signal including a numerical value. A least significant digit of the numerical value is selected. The least significant digit is concatenated with another least significant digit from another detecting of another noise in another laser output to form a number.
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公开(公告)号：US20190235167A1
公开(公告)日：2019-08-01
申请号：US16380171
申请日：2019-04-10
Applicant: Seagate Technology LLC
Inventor： Richard C.A. Pitwon
CPC classification number: G02B6/138 , G02B6/1221 , G02B6/125
Abstract: A waveguide includes a segment with a substantially uniform cure profile and related methods and systems for making and using the same. The waveguide is formed by modifying a laser beam used to write the waveguide to provide a substantially uniform cure profile in the waveguide. A marker characteristic of laser writing may be present in the waveguide. A method or system modifies an intensity profile or a shape profile of a laser beam to proactively compensate for exposure convolution based on the characteristics of the laser beam spot profile. A convolution compensator is positioned in the path of the laser beam to modify the beam spot profile during writing to form the one or more segments of the waveguide in a photo-curable layer.
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353.发明授权公开(公告)号：US10366722B1
公开(公告)日：2019-07-30
申请号：US15978432
申请日：2018-05-14
Applicant: Seagate Technology LLC
Inventor： Riyan Mendonsa , James Dillon Kiely , Joshua Ward Christensen , Jon D. Trantham , Chad Robert Barry , Tim Rausch
IPC: G11B11/00 , G11B7/1263 , G11B5/00 , G11B7/1267 , G11B5/60 , G11B7/126
Abstract: An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
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公开(公告)号：US10366720B2
公开(公告)日：2019-07-30
申请号：US15692957
申请日：2017-08-31
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Paul Julio Sonda , Peter Kevin McGeehin
Abstract: An apparatus comprises a slider comprising an air bearing surface (ABS) and configured for heat-assisted magnetic recording. The slider includes a writer and a reader at the ABS, a near-field transducer (NFT) proximate the writer, and an optical waveguide optically coupled to a laser source and the NFT. The slider further includes a sensor configured to contact and sense thermal asperities of a magnetic recording medium. The sensor is formed from one of Ru, Rh, Pd, Os, Ir, and Pt.
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公开(公告)号：US10366719B1
公开(公告)日：2019-07-30
申请号：US15925927
申请日：2018-03-20
Applicant: Seagate Technology LLC
Inventor： Jason W. Riddering , Dustin Mark Cvancara , Kenneth A. Haapala , Eric John McCalla , Wenzhong Zhu , Bin Huang
Abstract: A clearance heater of a write head is engaged with a boosted current that exceeds a steady-state current. The steady-state current causes the write head to maintain a desired clearance over a disk during writing, the boosted current being applied before a start of the writing. The boosted current is monotonically decreased before the start of the writing and the steady-state current is applied to the heater after the start of the writing.
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Patent Agency Ranking
356.发明授权公开(公告)号：US10366718B1
公开(公告)日：2019-07-30
申请号：US15933726
申请日：2018-03-23
Applicant: Seagate Technology LLC
Inventor： Lou Supino
Abstract: A signal is monitored that provides an indicator of disturbance affecting a hard disk drive. In response to determining that the indicator of the disturbance satisfies a threshold, a lattice recursive least squares computation is applied to the signal to determine at least one notch frequency. A notch filter is formed using the at least one notch frequency. The notch filter is used by a servo controller loop that positions a read/write head over a disk of the hard disk drive. The notch filter is applied to the servo control loop for subsequent positioning of the read/write head.
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公开(公告)号：US10365920B2
公开(公告)日：2019-07-30
申请号：US15686221
申请日：2017-08-25
Applicant: Seagate Technology LLC
Inventor： Ross John Stenfort , Keith Patrick McKay
Abstract: The present disclosure relates to systems and methods of device firmware update effects as seen by a computing host. In one example implementation according to aspects of the present disclosure, a method includes executing a first firmware received from a computing host, the first firmware including a first firmware revision identifier, executing a second firmware received from the computing host, and returning the first firmware revision identifier to the computing host during the execution of the second firmware and before an event occurs. The returning the first firmware revision identifier enables the computing host to continue executing without detecting an error in response to a change in a value of a returned firmware revision identifier throughout the execution of the first firmware and during execution of the second firmware.
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公开(公告)号：US20190227712A1
公开(公告)日：2019-07-25
申请号：US15877710
申请日：2018-01-23
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： ABHAY T. KATARIA , AMRUTA RAMESHCHANDRA INAMDAR
IPC: G06F3/06
Abstract: A data storage device that includes data storage media, with at least one of the data storage media having a plurality of embedded firmware modules. The data storage media include a non-volatile memory having different usage modes, with each different usage mode being associated with a different status of the data storage device, and each of the different usage modes having different space allocation configurations for data generated by the plurality of embedded firmware modules. A controller communicatively coupled to the non-volatile memory. The controller determines a change in the status of the data storage device and, in response to the change in the status of the data storage device, dynamically alters the usage mode of the non-volatile memory from a first one of the usage modes to a second one of the usage modes.
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359.发明申请公开(公告)号：US20190224806A1
公开(公告)日：2019-07-25
申请号：US15877615
申请日：2018-01-23
Applicant: Seagate Technology LLC
Inventor： Mihaela Ruxandra Baurceanu , Ricky Ray Anderson , Andrew David Habermas , Chea Phann
Abstract: The present disclosure includes charging members for charging abrasive particles into the surface of a lapping plate. The charging members include one or more channels to permit abrasive slurry to flow through when the charging member is in contact with the lapping plate.
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公开(公告)号：US10361068B2
公开(公告)日：2019-07-23
申请号：US15707346
申请日：2017-09-18
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Sridhar Dubbaka , Sriram Viswanathan , Christina Hutchinson
IPC: H01L21/312 , B44C1/22 , G11B5/31 , H01J37/32 , G11B5/00
Abstract: A method of forming a feature in a void, the method including filling the void having at least one sloped wall with a polymeric material; forming a layer of photoresist over the polymeric material; forming a gap in the layer of photoresist; and etching the polymeric material exposed by the gap in the layer of photoresist to form a feature.
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