-
公开(公告)号：US11587581B1
公开(公告)日：2023-02-21
申请号：US16263308
申请日：2019-01-31
Applicant: Seagate Technology LLC
Inventor： Mark Gubbins , Roger L. Hipwell, Jr. , Marcus B. Mooney , Mark Ostrowski , Tong Zhao , Michael J. Hardy , Michael Christopher Kautzky , Neil Zuckerman , Declan Macken , Francis A. McGinnity
IPC: G11B5/127 , G11B3/10 , G11B5/31 , G11B11/105 , G11B5/00
Abstract: A near-field transducer or heat sink is formed via a first process. The near-field transducer or heat sink is transfer-printed to a read/write head via a second process.
-
2.发明授权公开(公告)号：US10410668B1
公开(公告)日：2019-09-10
申请号：US16249452
申请日：2019-01-16
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Tyler Lenn Perry , Karim Tatah , Andrei Dorobantu , Todd Michael Lammers
IPC: G11B5/00 , G11B7/1263 , G11B5/09 , G11B20/18 , G11B5/012
Abstract: A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.
-
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.
-
公开(公告)号：US10354684B1
公开(公告)日：2019-07-16
申请号：US15973673
申请日：2018-05-08
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Daniel W. Olson
Abstract: A data storage device can employ one or more transducing heads that have a data reader and data writer each connected to a substrate of the transducing head. The substrate can be electrified with a predetermined surface charge by a charge circuit of the transducing head to maintain, or alter, a head-media spacing.
-
5.发明授权公开(公告)号：US10255940B1
公开(公告)日：2019-04-09
申请号：US15408982
申请日：2017-01-18
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Tyler Lenn Perry , Karim Tatah , Andrei Dorobantu , Todd Michael Lammers
IPC: G11B5/00 , G11B7/1263 , G11B5/09 , G11B20/18 , G11B5/012
Abstract: A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.
-
Patent Agency Ranking
公开(公告)号：US09721603B2
公开(公告)日：2017-08-01
申请号：US15237878
申请日：2016-08-16
Applicant: Seagate Technology LLC
Inventor： Daniel W. Olson , Declan Macken , Andrea L. Geer
IPC: G11B5/60
CPC classification number: G11B5/6011 , G11B5/6035 , G11B5/607 , G11B5/6076
Abstract: An apparatus comprises circuitry configured to apply an AC signal having a frequency to one of a slider of a recording head and a magnetic recording medium. The applied AC signal causes an oscillation in an electrostatic force and clearance between the slider and the medium at the frequency of the AC signal. A thermal sensor is configured to generate a sensor signal at the AC signal frequency in response to sensing changes in temperature resulting from the oscillating clearance. A detector is coupled to the circuitry and the thermal sensor. The detector is configured to detect one or both of head-medium spacing changes and head-medium contact using a phase of a first harmonic or an amplitude of a second harmonic of the thermal sensor signal.
-
公开(公告)号：US20170178669A1
公开(公告)日：2017-06-22
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
IPC: G11B5/09
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.
-
公开(公告)号：US09679598B2
公开(公告)日：2017-06-13
申请号：US14836010
申请日：2015-08-26
Applicant: Seagate Technology LLC
Inventor： Peng Peng , Declan Macken , Michael Thomas Johnson , Zheying Guo
CPC classification number: G11B5/6076 , G11B5/1278 , G11B5/3133 , G11B5/3143 , G11B5/607
Abstract: A writer core of a transducer is configured to interact with a magnetic recording medium and comprises an upper core and a lower core. At least one of the upper and lower cores comprises a return pole having a return shield. The apparatus also comprises a writer pole between the upper and lower cores, and a writer gap defined between the writer pole and the return shield. The apparatus further comprises a sensor element within one of the upper and lower cores that includes the writer gap. The sensor element has a temperature coefficient of resistance and is configured to sense for a change in temperature indicative of one or both of a change in spacing and contact between the transducer and the magnetic recording medium.
-
公开(公告)号：US09390741B2
公开(公告)日：2016-07-12
申请号：US14720299
申请日：2015-05-22
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.
-
公开(公告)号：US09202499B2
公开(公告)日：2015-12-01
申请号：US13802386
申请日：2013-03-13
Applicant: Seagate Technology LLC
Inventor： James Dillon Kiely , Karl Scheppers , Declan Macken , Michael Thomas Johnson
CPC classification number: G11B5/6076 , G11B5/3116 , G11B5/3133 , G11B5/3136 , G11B5/314 , G11B5/607 , G11B5/6088 , G11B2005/0021
Abstract: An apparatus is arranged to detect contact between an air bearing surface of a transducer and a medium using a modulated thermal sensor signal. A laser source produces modulated laser light. A thermal sensor is disposed at or near the air bearing surface and is subject to cyclic heating by the modulated laser light. The thermal sensor is configured to produce the modulated sensor signal in response to the cyclic heating.
Abstract translation: 一种装置被布置成使用调制的热传感器信号检测换能器的空气轴承表面和介质之间的接触。 激光源产生调制激光。 热传感器设置在空气轴承表面上或附近，并且通过调制的激光进行循环加热。 热传感器被配置为响应于循环加热产生调制的传感器信号。
-
-
-
-
-
-
-
-
-
Search Results
83
records
(took 0.024 seconds)
