公开(公告)号：US10283152B1

公开(公告)日：2019-05-07

申请号：US16006324

申请日：2018-06-12

Applicant: Seagate Technology LLC

Inventor： Chubing Peng ,  James Gary Wessel ,  Lien Lee

IPC: G11B11/00 ,  G11B5/48 ,  G11B5/00 ,  G11B13/08 ,  G11B5/60 ,  G11B7/12 ,  G11B11/24

Abstract: A recording head includes a waveguide configured to deliver light from a light source to a media-facing surface of the recording head. A near-field transducer is at the media-facing surface the proximate the waveguide. The near-field transducer includes a plasmonic structure with at least two opposing internal surfaces. A dielectric material fills a region between the at least two opposing internal surfaces. A dielectric slit extends between the at least two opposing internal surfaces. The dielectric slit is substantially parallel to the media-facing surface and includes a transparent material with a refractive index different than that of the dielectric material.

公开(公告)号：US20180233171A1

公开(公告)日：2018-08-16

申请号：US15947319

申请日：2018-04-06

Applicant: Seagate Technology LLC

Inventor： Karim Tatah ,  Mourad Benakli ,  James Gary Wessel

IPC: G11B7/1263

CPC classification number: G11B7/1263 ,  G11B5/02 ,  G11B5/09 ,  G11B5/40 ,  G11B5/455 ,  G11B2005/0021 ,  H01S5/02453 ,  H01S5/0261 ,  H01S5/0612 ,  H01S5/0617 ,  H01S5/06216 ,  H01S5/0651 ,  H01S5/06804 ,  H01S5/06808

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.

公开(公告)号：US09934801B1

公开(公告)日：2018-04-03

申请号：US15620550

申请日：2017-06-12

Applicant: Seagate Technology LLC

Inventor： James Gary Wessel ,  Chen Wang ,  Chubing Peng

IPC: G11B11/00 ,  G11B5/48 ,  G11B5/00 ,  G11B7/1263 ,  G11B11/105 ,  G11B7/126 ,  G11B5/60

CPC classification number: G11B5/6088 ,  G11B5/314 ,  G11B5/607 ,  G11B7/126 ,  G11B7/1263 ,  G11B11/10506 ,  G11B11/1051 ,  G11B2005/0021

Abstract: An apparatus comprises a slider having an air bearing surface and is configured for heat-assisted magnetic recording. The slider comprises a write pole, a near-field transducer (NFT) proximate the write pole, and an optical waveguide configured to receive light from a light source and couple the light to the NFT. The optical waveguide comprises first and second opposing major surfaces and opposing first and second edges connected to the first and second major surfaces. An optically opaque overlay is disposed on or adjacent one or both of the first and second major surfaces of the optical waveguide. Periodic structures are disposed on a surface of the optically opaque overlay facing the waveguide. The periodic structures are configured to organize stray light emanating from the waveguide for absorption by the optically opaque overlay.

公开(公告)号：US09905996B2

公开(公告)日：2018-02-27

申请号：US14492785

申请日：2014-09-22

Applicant: Seagate Technology LLC

Inventor： James Gary Wessel ,  Karim Tatah ,  Mourad Benakli

IPC: H01S3/04 ,  H01S5/068 ,  H01S5/026 ,  G11B5/02 ,  G11B5/40 ,  G11B19/04 ,  H01S5/024 ,  H01S5/062 ,  H01S5/0687 ,  G11B5/00

CPC classification number: H01S5/06804 ,  G11B5/02 ,  G11B5/40 ,  G11B19/046 ,  G11B2005/0021 ,  H01S5/02453 ,  H01S5/0261 ,  H01S5/06216 ,  H01S5/0687

Abstract: An apparatus includes a laser diode, a heater arrangement, and a circuit. The laser diode is configured to facilitate heat assisted magnetic recording during a lasing state. The heater arrangement is positioned proximate the laser diode. The circuit electrically couples the laser diode and the heater arrangement in a parallel relationship. The circuit is configured to alternately operate the laser diode in a lasing state and a non-lasing state, and to activate the heater arrangement during the non-lasing state to warm a junction of the laser diode.

公开(公告)号：US09875760B2

公开(公告)日：2018-01-23

申请号：US15698065

申请日：2017-09-07

Applicant: Seagate Technology LLC

Inventor： Kevin Anthony McNeill ,  Lars Ahlen ,  Jason Bryce Gadbois ,  James Gary Wessel ,  Bradley Ver Meer

IPC: G11B5/48 ,  G11B5/31

CPC classification number: G11B5/4853 ,  G11B5/10 ,  G11B5/314 ,  G11B5/4826 ,  G11B5/607 ,  G11B2005/0021

Abstract: A slider of a magnetic recording head comprises a media-facing surface, an upper surface opposing the media-facing surface, a leading edge, and a trailing edge. A plurality of electrical bond pads is disposed in a spaced-apart relationship on the trailing edge of the slider. An interconnect interposer is connected to the trailing edge of the slider. The interposer comprises a back side comprising a plurality of electrical contacts in contact with the plurality of bond pads on the trailing edge of the slider. The interposer also comprises a front side comprising a plurality of electrical interposer pads corresponding in number to the plurality of electrical contacts on the back side. The interposer further comprises a plurality of conductors each of which electrically couples one of the plurality of electrical contacts on the back side with one of the plurality of interposer pads on the front side.

公开(公告)号：US09558764B2

公开(公告)日：2017-01-31

申请号：US14886240

申请日：2015-10-19

Applicant: Seagate Technology LLC

Inventor： Ruoxi Yang ,  Pierre Asselin ,  Yongjun Zhao ,  James Gary Wessel ,  Tae-Woo Lee ,  Werner Scholz ,  Frank Edgar Stageberg

IPC: G11B11/00 ,  G11B5/187 ,  G11B5/60 ,  G02B6/122 ,  G11B5/31 ,  G11B5/00 ,  G11B11/105

CPC classification number: G11B5/1871 ,  G02B6/122 ,  G02B6/1228 ,  G11B5/314 ,  G11B5/6088 ,  G11B11/10532 ,  G11B11/10543 ,  G11B11/10554 ,  G11B2005/0021

Abstract: A write head includes a near-field transducer near a media-facing surface of the write head. The write head includes a waveguide having a core with a first side disposed proximate to the near-field transducer. The core overlaps the near-field transducer at a substrate-parallel plane. The core includes one of a step or a taper on a second side facing away from the first side. The step or the taper causes a reduced thickness of the core normal to the substrate-parallel plane. The write head includes a cladding layer that encompassing the second side of the core and that fills in the step or the taper.

Abstract translation: 写头包括靠近写入头的面向媒体的表面附近的近场换能器。 写头包括具有芯的波导，第一侧靠近近场换能器设置。 核心在基板平行平面处与近场换能器重叠。 芯部包括在远离第一侧的第二侧上的台阶或锥形中的一个。 台阶或锥形导致芯垂直于基板平行平面的芯的厚度减小。 写头包括包围芯的第二侧并且填充在台阶或锥形中的包覆层。

公开(公告)号：US09536554B2

公开(公告)日：2017-01-03

申请号：US14939023

申请日：2015-11-12

Applicant: Seagate Technology LLC

Inventor： Neil Zuckerman ,  Raul Horatio Andruet ,  James Gary Wessel ,  Chris Rea

IPC: G11B5/187 ,  G11B5/31 ,  G11B5/60 ,  G11B5/72 ,  G11B5/48 ,  G11B33/14 ,  G11B5/09 ,  G11B5/00

CPC classification number: G11B5/607 ,  G11B5/09 ,  G11B5/1871 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B5/722 ,  G11B33/144 ,  G11B2005/0021

Abstract: A magnetic head includes a read transducer and a write transducer at a media-facing surface of the magnetic head. The magnetic head includes at least one heater that causes heat deformation at the media-facing surface in response to different first and second energizing currents. The first energizing current results in a first close point between the media-facing surface and a recording medium. The second energizing current results in a second close point between the media-facing surface and the recording medium. The second close point is at a different location in the media-facing surface than the first close point.

Abstract translation: 磁头包括在磁头的面向媒体的表面上的读取换能器和写入换能器。 磁头包括至少一个加热器，其响应于不同的第一和第二通电电流而在面向介质的表面处引起热变形。 第一通电电流导致介质面向表面和记录介质之间的第一接近点。 第二通电电流导致介质表面和记录介质之间的第二接近点。 第二个接近点位于与第一个接近点相对的介质表面的不同位置。

公开(公告)号：US09202490B2

公开(公告)日：2015-12-01

申请号：US14206657

申请日：2014-03-12

Applicant: Seagate Technology LLC

Inventor： Neil Zuckerman ,  Raul Horacio Andruet ,  James Gary Wessel ,  Chris Rea

IPC: G11B5/48 ,  G11B5/72 ,  G11B5/00

CPC classification number: G11B5/607 ,  G11B5/09 ,  G11B5/1871 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B5/722 ,  G11B33/144 ,  G11B2005/0021

Abstract: A magnetic head includes a read transducer and a write transducer at a media-facing surface of the magnetic head. The magnetic head includes at least one heater that causes heat deformation at the media-facing surface in response to different first and second energizing currents. The first energizing current results in a first close point between the media-facing surface and a recording medium. The second energizing current results in a second close point between the media-facing surface and the recording medium. The second close point is at a different location in the media-facing surface than the first close point.

Abstract translation: 磁头包括在磁头的面向媒体的表面上的读取换能器和写入换能器。 磁头包括至少一个加热器，其响应于不同的第一和第二通电电流而在面向介质的表面处引起热变形。 第一通电电流导致介质面向表面和记录介质之间的第一接近点。 第二通电电流导致介质表面和记录介质之间的第二接近点。 第二个接近点位于与第一个接近点相对的介质表面的不同位置。

公开(公告)号：US09202479B1

公开(公告)日：2015-12-01

申请号：US14560243

申请日：2014-12-04

Applicant: Seagate Technology LLC

Inventor： James Gary Wessel ,  Raul Horacio Andruet ,  Chris Rea

IPC: G11B5/31

CPC classification number: G11B5/31 ,  G11B5/17 ,  G11B5/3123 ,  G11B5/3133 ,  G11B5/314 ,  G11B2005/0021

Abstract: An apparatus includes a heat assisted magnetic recording (HAMR) head that comprises a write coil, a write coil heatsink, and a spacer. The write coil heatsink is thermally coupled to the write coil. The spacer lies intermediate the write coil and the write coil heatsink.

Abstract translation: 一种装置包括一个包括写入线圈，写入线圈散热器和间隔物的热辅助磁记录（HAMR）头。 写入线圈散热器热耦合到写入线圈。 间隔物位于写入线圈和写入线圈散热片之间。

公开(公告)号：US20150262596A1

公开(公告)日：2015-09-17

申请号：US14206657

申请日：2014-03-12

Applicant: Seagate Technology LLC

Inventor： Neil Zuckerman ,  Raul Horacio Andruet ,  James Gary Wessel ,  Chris Rea

IPC: G11B5/48 ,  G11B5/72

CPC classification number: G11B5/607 ,  G11B5/09 ,  G11B5/1871 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B5/722 ,  G11B33/144 ,  G11B2005/0021

Abstract: A magnetic head includes a read transducer and a write transducer at a media-facing surface of the magnetic head. The magnetic head includes at least one heater that causes heat deformation at the media-facing surface in response to different first and second energizing currents. The first energizing current results in a first close point between the media-facing surface and a recording medium. The second energizing current results in a second close point between the media-facing surface and the recording medium. The second close point is at a different location in the media-facing surface than the first close point.

Abstract translation: 磁头包括在磁头的面向媒体的表面上的读取换能器和写入换能器。 磁头包括至少一个加热器，其响应于不同的第一和第二通电电流而在面向介质的表面处引起热变形。 第一通电电流导致介质面向表面和记录介质之间的第一接近点。 第二通电电流导致介质表面和记录介质之间的第二接近点。 第二个接近点位于与第一个接近点相对的介质表面的不同位置。