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公开(公告)号：US10964354B1
公开(公告)日：2021-03-30
申请号：US16387070
申请日：2019-04-17
Applicant: Seagate Technology LLC
Inventor： Robert D. Turner , Yuhang Cheng , Peter W. Kanas , Martin Liam McGarry , Peter Kevin McGeenhin , Kevin R. Heim , Edward Charles Gage , Shaikh Mubassar Ali , Huazhou Lou
Abstract: A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.
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2.发明申请公开(公告)号：US20180114542A1
公开(公告)日：2018-04-26
申请号：US15671262
申请日：2017-08-08
Applicant: Seagate Technology LLC
Inventor： Tim Rausch , Edward Charles Gage , Joshua Ward Christensen , Todd Michael Lammers
IPC: G11B7/1263 , H01S5/0683 , G11B5/012 , H01S5/042 , G11B5/00
CPC classification number: G11B5/012 , G11B2005/0021 , H01S5/0427 , H01S5/0683
Abstract: Before writing to a heat-assisted magnetic recording medium, a DC signal modulated with an AC signal is applied to a laser of a read/write head. A modulation level of an optical power sensor is measured, the optical power sensor being coupled to detect optical output of the laser in response to the modulated current. A target value of the DC signal that causes the modulation levels to reach a predetermined value between zero and a maximum value is determined and used to set a bias current for subsequent activation of the laser based.
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3.发明授权Adjusting laser power to achieve equivalent track spacing for paired heads that simultaneously write to a heat-assisted recording medium 有权调整激光功率以实现同时写入热辅助记录介质的成对磁头的等效轨道间距公开(公告)号：US09495995B1
公开(公告)日：2016-11-15
申请号：US14834886
申请日：2015-08-25
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Kenneth Haapala , Jon Trantham , Edward Charles Gage
CPC classification number: G11B7/1263 , G11B5/012 , G11B5/02 , G11B5/6088 , G11B20/10453 , G11B2005/0021
Abstract: A relatively larger nominal track spacing associated with a first write head is determined and a relatively smaller nominal track spacing associated with a second write head is determined. The first and second write heads simultaneously write to respective different first and second surfaces of a heat-assisted recording medium. A laser write power for a selected one of the first write head and the second write head is changed to enable the first write head and the second write head to operate at an equivalent nominal track spacing.
Abstract translation: 确定与第一写入头相关联的相对较大的标称磁道间隔，并且确定与第二写入头相关联的相对较小的标称磁道间隔。 第一和第二写入头同时写入热辅助记录介质的各个不同的第一和第二表面。 第一写入头和第二写入头中的所选择的一个的激光写入功率被改变，使得第一写头和第二写头能够以等效的标称磁道间隔工作。
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4.发明授权Write parameters used to ensure accurate phase lock during reading of a heat-assisted magnetic recording medium 有权写入参数，以确保读取热辅助磁记录介质时的精确锁相公开(公告)号：US09240205B1
公开(公告)日：2016-01-19
申请号：US14624100
申请日：2015-02-17
Applicant: Seagate Technology LLC
Inventor： Kaizhong Gao , Pu-Ling Lu , Edward Charles Gage , Wenzhong Zhu
CPC classification number: G11B7/1263 , G11B5/012 , G11B5/02 , G11B5/3133 , G11B5/455 , G11B5/4866 , G11B5/59616 , G11B5/6011 , G11B5/6088 , G11B2005/0021
Abstract: Based on thermal time constant of a head-to-media spacing of a write head, a write parameter is determined that includes at least one of: a modified laser power boost used at a beginning of writing; and a time adjustment affecting the beginning of the writing. The write parameter is applied to writing operations affecting a heat-assisted magnetic recording medium, the write parameter ensuring accurate phase lock during reading of the heat-assisted magnetic recording medium.
Abstract translation: 基于写头的头对媒体间隔的热时间常数，确定写入参数，其包括以下中的至少一个：在写入开始时使用的修改的激光功率提升; 以及影响写作开始的时间调整。 写入参数适用于影响热辅助磁记录介质的写入操作，写入参数确保在读取热辅助磁记录介质期间精确锁相。
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公开(公告)号：US08804272B1
公开(公告)日：2014-08-12
申请号：US13932398
申请日：2013-07-01
Applicant: Seagate Technology LLC
Inventor： Housan Dakroub , Edward Charles Gage , Tim Rausch
IPC: G11B21/02
CPC classification number: G11B5/6076 , G11B5/6005 , G11B5/607 , G11B11/10554 , G11B20/10009
Abstract: A transducer is configured to interact with a magnetic storage medium, a first channel comprises a first sensor and first circuitry configured to adjust a plurality of first channel parameters, and a second channel comprises a second sensor and second circuitry configured to adjust a plurality of second channel parameters. The first and second channel parameters are independently adjustable by the first and second circuitry, respectively. A detector is coupled to the first and second channels, and configured to detect a head-medium interface event.
Abstract translation: 换能器被配置为与磁存储介质相互作用，第一通道包括第一传感器和配置成调整多个第一通道参数的第一电路，第二通道包括第二传感器和第二电路，其被配置为调整多个第二通道参数 通道参数。 第一和第二通道参数分别由第一和第二电路独立地调节。 检测器耦合到第一和第二通道，并且被配置为检测头 - 介质接口事件。
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Patent Agency Ranking
公开(公告)号：US20210210121A1
公开(公告)日：2021-07-08
申请号：US17207027
申请日：2021-03-19
Applicant: Seagate Technology LLC
Inventor： Robert D. Turner , Yuhang Cheng , Peter W. Kanas , Martin Liam McGarry , Peter Kevin McGeehin , Kevin R. Heim , Edward Charles Gage , Shaikh Mubassar Ali , Huazhou Lou
Abstract: A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.
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公开(公告)号：US11049515B1
公开(公告)日：2021-06-29
申请号：US16870538
申请日：2020-05-08
Applicant: Seagate Technology LLC
Inventor： Zengyuan Liu , Edward Charles Gage , Tim Rausch , Stephanie Hernandez
Abstract: A recording head for writing data on tracks of a data storage medium is provided. The recording head includes a writer having a write pole and a trailing shield. The write pole includes a pole tip configured to write on the tracks of the data storage medium. The recording head also includes first and second writing-assistance wires positioned between the pole tip and the trailing shield in a down-track direction to enable a writing-assistance current to be provided to produce an assist magnetic field that augments a write field produced by the write pole.
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公开(公告)号：US09536550B1
公开(公告)日：2017-01-03
申请号：US14945715
申请日：2015-11-19
Applicant: Seagate Technology LLC
Inventor： Minjie Ma , Edmun Seng , Tim Rausch , Edward Charles Gage
CPC classification number: G11B5/455 , G11B5/5534 , G11B2005/0021
Abstract: A cross-track profile of a known good test track on a recording medium is read during operation of a data storage device. Two or more center locations of the test track are determined at two or more different amplitude levels via a read transducer. A health condition of the read transducer is determined by comparing the two or more center locations of the test track with one another.
Abstract translation: 在数据存储设备的操作期间读取记录介质上已知的良好测试轨迹的交叉轨道轮廓。 测试轨道的两个或更多个中心位置通过读取换能器以两个或多个不同的振幅水平确定。 通过将测试轨道的两个或更多个中心位置相互比较来确定读取换能器的健康状况。
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公开(公告)号：US20160240216A1
公开(公告)日：2016-08-18
申请号：US14624089
申请日：2015-02-17
Applicant: Seagate Technology LLC
Inventor： Minjie Ma , Edward Charles Gage , Kaizhong Gao
IPC: G11B5/09 , G11B20/12 , G11B7/1263
CPC classification number: G11B7/1263 , G11B5/02 , G11B7/126 , G11B11/10515 , G11B11/10595 , G11B20/1217 , G11B2005/0021 , G11B2020/1232
Abstract: An apparatus comprises a controller configured to apply a writing configuration (WC) to a heat-assisted magnetic recording head to write data to a recording medium. The recording medium includes a plurality of sectors. The controller is further configured to determine an optimized WC for each of the plurality of sectors and initiate a write operation to one of the plurality of sectors. The write operation is configured to be performed by the head utilizing the optimized WC for the respective sector.
Abstract translation: 一种装置包括：控制器，被配置为将写入配置（WC）应用于热辅助磁记录头以将数据写入记录介质。 记录介质包括多个扇区。 所述控制器还被配置为为所述多个扇区中的每一个确定优化的WC，并且启动对所述多个扇区之一的写入操作。 写入操作被配置为由头部使用针对相应扇区的优化的WC执行。
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公开(公告)号：US09202489B2
公开(公告)日：2015-12-01
申请号：US14163632
申请日：2014-01-24
Applicant: Seagate Technology LLC
Inventor： Nils Gokemeijer , Edward Charles Gage , Roger L. Hipwell , Michael Christopher Kautzky , Scott Eugene Olson
CPC classification number: G11B5/4866 , G11B5/105 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus that includes a slider having a mounting surface, the mounting surface opposite a media-facing surface of the slider. The apparatus includes a laser diode mounted on a side surface to the mounting surface. The laser diode has an active region of the laser diode is disposed substantially perpendicular to the mounting surface.
Abstract translation: 一种装置，包括具有安装表面的滑块，所述安装表面与所述滑块的面向介质的表面相对。 该装置包括安装在安装表面的侧表面上的激光二极管。 激光二极管具有基本上垂直于安装表面设置的激光二极管的有源区。
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