-
公开(公告)号：US20150170681A1
公开(公告)日：2015-06-18
申请号：US14632062
申请日：2015-02-26
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Mourad Benakli , Kirill Aleksandrovich Rivkin , James Gary Wessel , Dehua Han , Huaqing Yin , Jianhua Xue
CPC classification number: G11B5/11 , G11B5/3116 , G11B5/315 , G11B5/6082
Abstract: A write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing surface, a leading surface that is opposite the trailing surface, and first and second surfaces; a trailing shield proximate the trailing surface of the magnetic write pole; first and second gaps proximate the first and second surfaces of the magnetic write pole; first and second side shields proximate the first and second gaps, each of the first and second side shields having a trailing shield surface; and first and second antiferromagnetic-coupling layers positioned between the trailing shield surfaces of the first and second side shields and the trailing shield.
Abstract translation: 写头，写头具有空气轴承表面，写头包括磁写极，其中在空气轴承表面处，写极具有后表面，与后表面相对的前表面，以及第一和 第二面 靠近磁性写入磁极的后表面的尾部屏蔽; 靠近磁写入极的第一和第二表面的第一和第二间隙; 靠近第一和第二间隙的第一和第二侧面屏蔽件，第一和第二侧面屏蔽件中的每一个具有尾部屏蔽表面; 以及第一和第二反铁磁耦合层，其位于第一和第二侧面屏蔽的尾部屏蔽表面与后屏蔽之间。
-
32.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.
-
公开(公告)号：US08970992B2
公开(公告)日：2015-03-03
申请号：US13890387
申请日：2013-05-09
Applicant: Seagate Technology LLC
Inventor： Mourad Benakli , Kirill Aleksandrovich Rivkin , James Gary Wessel , Dehua Han , Huaqing Yin , Jianhua Xue
CPC classification number: G11B5/11 , G11B5/3116 , G11B5/315 , G11B5/6082
Abstract: A write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing surface, a leading surface that is opposite the trailing surface, and first and second surfaces; a trailing shield proximate the trailing surface of the magnetic write pole; first and second gaps proximate the first and second surfaces of the magnetic write pole; first and second side shields proximate the first and second gaps, each of the first and second side shields having a trailing shield surface; and first and second antiferromagnetic-coupling layers positioned between the trailing shield surfaces of the first and second side shields and the trailing shield.
Abstract translation: 写头，写头具有空气轴承表面，写头包括磁写极，其中在空气轴承表面处，写极具有后表面，与后表面相对的前表面，以及第一和 第二面 靠近磁性写入磁极的后表面的尾部屏蔽; 靠近磁写入极的第一和第二表面的第一和第二间隙; 靠近第一和第二间隙的第一和第二侧面屏蔽件，第一和第二侧面屏蔽件中的每一个具有尾部屏蔽表面; 以及第一和第二反铁磁耦合层，其位于第一和第二侧面屏蔽的尾部屏蔽表面与后屏蔽之间。
-
34.发明申请公开(公告)号：US20140347760A1
公开(公告)日：2014-11-27
申请号：US14457678
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
IPC: G11B5/60
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：US11961543B2
公开(公告)日：2024-04-16
申请号：US17898936
申请日：2022-08-30
Applicant: Seagate Technology LLC
Inventor： Karim Tatah , Mourad Benakli , James Gary Wessel
IPC: H01S5/06 , G11B5/02 , G11B5/09 , G11B5/40 , G11B5/455 , G11B7/1263 , H01S5/024 , H01S5/026 , H01S5/065 , H01S5/068 , G11B5/00 , H01S5/062
CPC classification number: G11B7/1263 , G11B5/02 , G11B5/09 , G11B5/40 , G11B5/455 , H01S5/0261 , H01S5/0612 , H01S5/0651 , H01S5/06804 , H01S5/06808 , G11B2005/0021 , H01S5/02453 , H01S5/0617 , H01S5/06216
Abstract: A method and apparatus provide for determining a temperature at a junction of a laser diode when the laser diode is operated in a lasing state that facilitates heat-assisted magnetic recording, comparing the junction temperature and an injection current supplied during the lasing state to stored combinations of junction temperature and injection current, and determining a likelihood of mode hopping occurring for the laser diode during the lasing state based on the comparison to stored combinations of junction temperature and injection current.
-
Patent Agency Ranking
36.发明授权公开(公告)号：US10657998B1
公开(公告)日：2020-05-19
申请号：US16408982
申请日：2019-05-10
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel
Abstract: A slider configured for heat-assisted magnetic recording comprises a magnetic writer, a near-field transducer, and an optical waveguide coupling the near-field transducer to a light source. The writer is situated proximate the near-field transducer at an air bearing surface of the slider and comprises a first return pole, a second return pole, and a write pole situated between and spaced apart from the first return pole and the second return pole. A structural element is situated at or near the air bearing surface between the write pole and one of the first and second return poles. The structural element comprises a cavity. A thermal sensor is disposed in the cavity. The thermal sensor is configured for sensing contact between the slider and a magnetic recording medium, asperities of the medium, and output optical power of the light source.
-
公开(公告)号：US10395680B1
公开(公告)日：2019-08-27
申请号：US15956044
申请日：2018-04-18
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel , Chen Wang
IPC: G11B11/105 , G11B5/48 , G11B7/1263 , G11B5/60 , G11B5/012 , G11B5/40 , G11B5/02 , G11B5/00
Abstract: An apparatus includes a slider having an air bearing surface (ABS). A near-field transducer (NFT) is disposed at or near the ABS. The slider has an optical waveguide configured to couple light from a laser source to the NFT. A thermal sensor is disposed at a leading edge of the NFT, the thermal sensor has an ABS section situated at or proximate the ABS and a distal section extending away from the ABS. The thermal sensor is configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium.
-
公开(公告)号：US20190172482A1
公开(公告)日：2019-06-06
申请号：US16272378
申请日：2019-02-11
Applicant: Seagate Technology LLC
Inventor： Gary Joseph Kunkel , Raul Horacio Andruet , James Gary Wessel
CPC classification number: G11B5/17 , G11B5/012 , G11B5/187 , G11B5/3106 , G11B5/3123 , G11B5/3133 , G11B5/3136 , G11B5/40 , G11B2005/0021
Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.
-
39.发明授权公开(公告)号：US10297282B1
公开(公告)日：2019-05-21
申请号：US16045142
申请日：2018-07-25
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel
Abstract: A slider configured for heat-assisted magnetic recording comprises a magnetic writer, a near-field transducer, and an optical waveguide coupling the near-field transducer to a light source. The writer is situated proximate the near-field transducer at an air bearing surface of the slider and comprises a first return pole, a second return pole, and a write pole situated between and spaced apart from the first return pole and the second return pole. A structural element is situated at or near the air bearing surface between the write pole and one of the first and second return poles. The structural element comprises a cavity. A thermal sensor is disposed in the cavity. The thermal sensor is configured for sensing contact between the slider and a magnetic recording medium, asperities of the medium, and output optical power of the light source.
-
40.发明授权公开(公告)号：US10147446B1
公开(公告)日：2018-12-04
申请号：US16020465
申请日：2018-06-27
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel , Zoran Jandric , Vasudevan Ramaswamy
Abstract: An apparatus comprises a slider configured for heat assisted magnetic recording and comprising a substrate. At least one component of the slider generates heat when energized. At least one thermal via extends through a portion of the slider from a location proximate the component to the substrate. The thermal via is configured to conduct heat away from the component and to the substrate.
-
-
-
-
-
-
-
-
-
Search Results
101
records
(took 0.032 seconds)
