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公开(公告)号：US09990947B1
公开(公告)日：2018-06-05
申请号：US15789415
申请日：2017-10-20
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Jon Karsten Klarqvist
IPC: G11B5/02 , G11B5/48 , G11B7/1263 , G11B5/00
CPC classification number: G11B5/4853 , G11B5/4866 , G11B7/1263 , G11B2005/0021
Abstract: A slider of a heat-assisted recording head comprises electrical bond pads coupled to bias sources and a ground pad, an air bearing surface, and a waveguide configured to receive light from a laser source. A contact sensor proximate the air bearing surface is coupled between a first bond pad and a second bond pad. A bolometer is coupled to a reference thermal sensor. The bolometer is situated at a slider location that receives at least some of the light communicated along the waveguide. The reference thermal sensor is situated at a slider location unexposed to the light communicated along the waveguide. The bolometer and reference thermal sensor are coupled between the first and second bond pads and in parallel with the contact sensor. A ground connection is coupled to the ground pad and at a connection between the bolometer and the reference thermal sensor.
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公开(公告)号：US09978412B1
公开(公告)日：2018-05-22
申请号：US15337308
申请日：2016-10-28
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Patrick Carl Fletcher , Song Chen
IPC: G11B11/00 , G11B5/60 , G11B5/31 , G11B5/00 , G11B7/1387 , G11B11/105
CPC classification number: G11B5/6088 , G11B5/314 , G11B7/1387 , G11B11/10543 , G11B2005/0021
Abstract: A slider is configured for heat-assisted magnetic recording and comprises an NFT and a transparent thermocouple configured to produce a signal indicative of temperature at the NFT. A detector can be coupled to the thermocouple and configured to detect one or both of spacing changes and contact between the slider and a magnetic recording medium.
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公开(公告)号：US09905255B1
公开(公告)日：2018-02-27
申请号：US15415165
申请日：2017-01-25
Applicant: Seagate Technology LLC
Inventor： Narayanan Ramakrishnan , Declan Macken , Jason Bryce Gadbois
CPC classification number: G11B5/4853 , G11B5/3133 , G11B5/314 , G11B5/397 , G11B5/607 , G11B5/6076 , G11B2005/0021
Abstract: A slider of a magnetic recording head comprises a ground pad and a plurality of electrical bond pads coupled to bias sources. A component of the slider is coupled between first and second bond pads. A first heater of the slider is coupled between the first bond pad and the ground pad. A second heater of the slider is coupled between the second bond pad and the ground pad. A first diode is disposed on the slider and coupled in series with the first heater. A second diode is disposed on the slider and coupled in series with the second heater.
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公开(公告)号：US09905254B1
公开(公告)日：2018-02-27
申请号：US15414234
申请日：2017-01-24
Applicant: Seagate Technology LLC
Inventor： Narayanan Ramakrishnan , Declan Macken
CPC classification number: G11B5/4853 , G11B5/3133 , G11B5/314 , G11B5/397 , G11B5/607 , G11B5/6076 , G11B2005/0021
Abstract: A slider of a magnetic recording head includes a ground pad and a plurality of electrical bond pads coupled to bias sources. The plurality of electrical bond pads includes a plurality of shared bond pads. A first component of the slider is coupled to a first bond pad and one of the shared bond pads. The slider includes one or more additional components each coupled to a respective pair of the shared bond pads. A first ground-coupled component of the slider is coupled between one of the shared bond pads and the ground pad. A first diode is disposed on the slider and coupled in series with the first ground-coupled component. A first Zener diode can be disposed on the slider and coupled between the first diode and the ground pad for enhanced ground noise immunity of the powered devices.
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公开(公告)号：US20180005656A1
公开(公告)日：2018-01-04
申请号：US15196549
申请日：2016-06-29
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Paul Sonda , Erik Hutchinson , Jin Fang , John Wolf
IPC: G11B5/60
CPC classification number: G11B5/6076 , G11B5/024 , G11B5/3133 , G11B5/4853 , G11B5/4886 , G11B5/6011 , G11B5/607
Abstract: A magnetic recording head includes a plurality of writers and at least one reader. The plurality of writers and the reader define a plurality of close points of the head. The plurality of writers are spaced apart from one another in a cross-track direction and positioned in the same plane of the head. A plurality of contact sensors are positioned proximate the plurality of writers and the reader. The contact sensors are coupled together and to a pair of electrical bond pads of the head and configured to sense for head-disk contact at each of the close points.
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Patent Agency Ranking
公开(公告)号：US09691419B1
公开(公告)日：2017-06-27
申请号：US14973333
申请日：2015-12-17
Applicant: Seagate Technology LLC
Inventor： Daniel W. Olson , John M. Wolf , Declan Macken , Gavin L. Brinkley
CPC classification number: G11B5/455 , G11B5/40 , G11B5/6094
Abstract: Electrostatic discharge protection can be afforded to a data recording head in accordance with various embodiments. A data recording head may consist of a circuit having a preamp ground connected to a ground substrate via a ground trace. The ground trace can consist of a first leg connected to the ground substrate and a second leg with an open connection extending from a dice line.
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37.发明授权公开(公告)号：US09664572B2
公开(公告)日：2017-05-30
申请号：US13687445
申请日：2012-11-28
Applicant: Seagate Technology LLC
Inventor： Wei Tian , Declan Macken , Huaqing Yin , Venkateswara Rao Inturi , Eric Walter Singleton
CPC classification number: G01K7/16 , C23C14/06 , G11B5/607 , H01C7/006 , H01C7/008 , H01C7/021 , H01C7/06
Abstract: An apparatus comprises a head transducer and a resistive temperature sensor provided on the head transducer. The resistive temperature sensor comprises a first layer comprising a conductive material and having a temperature coefficient of resistance (TCR) and a second layer comprising at least one of a specular layer and a seed layer. A method is disclosed to fabricate such sensor with a laminated thin film structure to achieve a large TCR. The thicknesses of various layers in the laminated thin film are in the range of few to a few tens of nanometers. The combinations of the deliberately optimized multilayer thin film structures and the fabrication of such films at the elevated temperatures are disclosed to obtain the large TCR.
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公开(公告)号：US09396745B2
公开(公告)日：2016-07-19
申请号：US14201358
申请日：2014-03-07
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Jason Gadbois , Eric W. Singleton , John M. Wolf
IPC: G11B5/39
CPC classification number: G11B5/3951 , G11B5/3909 , G11B5/3912 , G11B5/3932 , G11B5/3948 , G11B5/3958 , G11B2005/3996
Abstract: Apparatus for sensing data from a magnetic recording medium using a multi-sensor reader with different readback sensitivities. In accordance with some embodiments, a data transducing head has first and second read sensors. The first read sensor is optimized for reading data and the second read sensor is optimized to detect thermal asperity (TA) events.
Abstract translation: 用于使用具有不同回读敏感度的多传感器读取器来感测来自磁记录介质的数据的装置。 根据一些实施例，数据传感头具有第一和第二读取传感器。 第一个读取传感器被优化用于读取数据，第二个读取传感器被优化以检测热不均匀性（TA）事件。
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公开(公告)号：US09202498B2
公开(公告)日：2015-12-01
申请号：US13836124
申请日：2013-03-15
Applicant: Seagate Technology LLC
Inventor： Declan Macken
CPC classification number: G11B5/607 , G01K13/06 , G11B5/6076
Abstract: A head transducer comprises a reader coupled to reader bond pads and configured to interact with a magnetic storage medium. A first thermal sensor is configured to produce a first sensor signal. The first sensor is biased relative to a common mode voltage at the reader bond pads. A second thermal sensor is configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic storage medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact.
Abstract translation: 头传感器包括耦合到读取器接合焊盘并被配置为与磁存储介质相互作用的读取器。 第一热传感器被配置为产生第一传感器信号。 第一传感器相对于读取器接合焊盘处的共模电压而偏置。 第二热传感器被配置为产生第二传感器信号。 第一传感器和第二传感器中的一个位于头部换能器相对于磁性存储介质的接近点或其附近，并且第一和第二传感器中的另一个与近端点间隔开。 电路被配置为组合第一和第二传感器信号并产生指示头 - 介质间隔和头 - 介质接触的变化中的一个或两个的组合的传感器信号。
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40.发明授权公开(公告)号：US09042050B2
公开(公告)日：2015-05-26
申请号：US14457694
申请日：2014-08-12
Applicant: Seagate Technology LLC
Inventor： Michael Thomas Johnson , Dongming Liu , Huazhou Lou , Declan Macken , Timothy William Stoebe , James Gary Wessel , Xuan Zheng
CPC classification number: G11B5/607 , G01K13/00 , G11B5/024 , G11B5/3133 , G11B5/6011 , G11B5/6076 , G11B7/0948 , G11B7/121 , G11B20/10 , G11B27/36
Abstract: A head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.
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