公开(公告)号：US10783917B1

公开(公告)日：2020-09-22

申请号：US16268708

申请日：2019-02-06

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Paula Frances McElhinney ,  Roger L. Hipwell, Jr. ,  John Wolf

IPC: G11B11/00 ,  G11B11/105 ,  G11B5/00

Abstract: A recording head includes a substrate, a read transducer, a waveguide core, and a near-field transducer at an end of the waveguide core proximate a media-facing surface. The recording head includes a magnetic write pole and coil. A laser diode unit with one or more non-self-supporting layers of crystalline material region is transfer printed between layers of the recording head.

公开(公告)号：US20200176028A1

公开(公告)日：2020-06-04

申请号：US16080990

申请日：2017-02-27

Applicant: Technische Universiteit Delft

Inventor： Ranko Toskovic ,  Eleonora Fahrenfort ,  Marnix Rebergen ,  Alexander Ferdinand Otte ,  Floris Eduard Kalff ,  Jan Girovsky

IPC: G11B11/00 ,  G11B9/06 ,  G11B9/14 ,  H01L21/02 ,  B82Y10/00

Abstract: The present invention is in the field of an atomic scale data storage device which uses vacancy manipulation, a method of providing said device, and a method of operating said device. Prior art mass data storage devices typically rely on magnetic materials forming discrete arrays or on nanoscale transistors. Further examples are e.g. optical systems such as a DVD and a compact disk. These devices and systems have a large, but for some applications still limited, storage capacity.

公开(公告)号：US10388310B1

公开(公告)日：2019-08-20

申请号：US16135251

申请日：2018-09-19

Applicant: Seagate Technology LLC

Inventor： Christopher Neil Harvey ,  Aidan Dominic Goggin ,  Kelly Elizabeth Callan ,  John Bernard McGurk ,  Reyad Mehfuz

IPC: G11B11/00 ,  G11B5/48 ,  G02B6/122 ,  G11B11/105 ,  G11B7/1387 ,  G02B6/126 ,  G02B6/132 ,  G02B6/27 ,  G02B6/136 ,  G11B5/00 ,  G11B5/60

Abstract: An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT. The layered waveguide includes an interface between the first layer and the second layer, the interface comprises a curve.

公开(公告)号：US10204655B1

公开(公告)日：2019-02-12

申请号：US15784509

申请日：2017-10-16

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Tim Rausch ,  Edward Charles Gage ,  James Dillon Kiely ,  Paul M. Jones ,  Yang Yang

IPC: G11B11/00 ,  G11B21/10 ,  G11B5/00 ,  G11B7/126 ,  G11B7/1267 ,  G11B7/1263 ,  G11B5/60

Abstract: Data is written to data sectors of a heat-assisted magnetic recording (HAMR) medium using a laser of a HAMR head supplied with a sum of an operational current and a threshold current. A service current is supplied to the laser when the head is over servo sectors of the medium, such that a temperature of the medium at the servo sectors is greater than or equal to a temperature of the head when over the servo sectors.

公开(公告)号：US10152991B2

公开(公告)日：2018-12-11

申请号：US15837205

申请日：2017-12-11

Applicant: Headway Technologies, Inc.

Inventor： Tsutomu Chou ,  Kouji Shimazawa ,  Tobias Maletzky ,  Weihao Xu ,  Shinji Hara ,  Yoshihiro Tsuchiya ,  Yiming Wang ,  Cherng-Chyi Han ,  Xuhui Jin

IPC: G11B11/00 ,  G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G11B5/127 ,  G11B5/00 ,  G11B11/105

Abstract: A method for manufacturing a TAMR (thermal assisted magnetic recording) write head. The write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.

公开(公告)号：US10115423B1

公开(公告)日：2018-10-30

申请号：US15723410

申请日：2017-10-03

Applicant: Seagate Technology LLC

Inventor： Mark Anthony Gubbins ,  Choon How Gan ,  Roberto Fernandez Garcia ,  Michael James Hardy ,  Andres David Barbosa Neira

IPC: G11B11/00 ,  G11B5/60 ,  G11B5/00 ,  G11B5/48

Abstract: A near-field transducer has an enlarged portion with a peg extending towards a media-facing surface. Two reflectors are located co-planar with near-field transducer and located on either side of the near-field transducer in a crosstrack direction. The two reflectors are separated by a gap proximate the peg of the near-field transducer. The two reflectors each include a first edge at the media facing surface and a second edge at an acute angle to the media-facing surface. The second edge faces the near-field transducer. The two reflectors concentrate the light on the peg of the near-field transducer.

公开(公告)号：US10079032B2

公开(公告)日：2018-09-18

申请号：US15316611

申请日：2014-06-06

Applicant: InnovaStella Co., Ltd. ,  SCHOOL JURIDICAL PERSON OF FUKUOKA KOGYO DAIGAKU

Inventor： Ryuichi Katayama ,  Katsumi Yoshizawa ,  Satoshi Sugiura ,  Takayuki Kasuya

IPC: G11B5/02 ,  G11B11/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/00

CPC classification number: G11B5/012 ,  G11B5/31 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A combination of a semiconductor member and a metal member is selected appropriately from a view point of increasing an enhancement factor of a near-field light. A device (1) has a semiconductor member (101) and a metal member (102), a near-field light is generated at the metal member when an energy is supplied to the semiconductor member, the metal member is made of an alloy including a first metal and a second metal, a condition of Rm1

公开(公告)号：US10068596B2

公开(公告)日：2018-09-04

申请号：US15285721

申请日：2016-10-05

Applicant: Headway Technologies, Inc.

Inventor： Matteo Staffaroni ,  Tobias Maletzky ,  Xuhui Jin ,  Weihao Xu ,  Kenichi Takano

IPC: G11B11/00 ,  G11B5/48 ,  G11B5/39 ,  G11B5/31 ,  G11B5/00 ,  G11B7/135 ,  G11B7/22 ,  G11B5/60

Abstract: An optically shielded TAMR (thermally assisted magnetic recording) write head has a metal waveguide blocker formed against a distal end of a waveguide and a pair of symmetrically disposed optical side shields formed to either side of a plasmon generator formed above the waveguide. The waveguide focuses optical radiation on the adjacent plasmon generator where it excites plasmon modes that heat the recording medium with near-field energy and the waveguide blocker prevents excess optical radiation from blurring the spot on the recording region. The optical side shields further restrict loosely coupled optical radiation from reaching the recording region and blurring the optical spot and improves down-track and cross-track thermal gradients.

公开(公告)号：US10061088B1

公开(公告)日：2018-08-28

申请号：US15831722

申请日：2017-12-05

Applicant: Seagate Technology LLC

Inventor： Chubing Peng

IPC: G11B11/00 ,  G02B6/35 ,  G11B5/48 ,  G11B11/105 ,  G11B13/04 ,  G02B6/02 ,  G02B6/26 ,  G11B5/00

CPC classification number: G02B6/3532 ,  G02B6/02076 ,  G02B6/1226 ,  G02B6/14 ,  G02B6/262 ,  G02B6/2813 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B11/10539 ,  G11B11/10595 ,  G11B13/045 ,  G11B2005/0021

Abstract: A first waveguide portion receives light from an energy source in a fundamental transverse electric (TE00) mode. A mode converter converts a portion of the light to higher-order transverse electric (TE10) mode. A second waveguide portion receives the light at the TE10 mode and delivers the light to a near-field transducer that heats a recording medium in response thereto. An optical spatial mode filter prevents remnant light in the TE00 mode from affecting the recording medium while passing the light at the TE10 mode.

公开(公告)号：US10008231B2

公开(公告)日：2018-06-26

申请号：US15795044

申请日：2017-10-26

Applicant: Seagate Technology LLC

Inventor： Steven Granz ,  Edward Gage ,  Alfredo Chu ,  Wenzhong Zhu

IPC: G11B11/00 ,  G11B7/1263 ,  G11B7/126 ,  G11B5/60 ,  G11B7/1267 ,  G11B20/12 ,  G11B5/00

CPC classification number: G11B7/1263 ,  G11B5/012 ,  G11B5/6088 ,  G11B7/126 ,  G11B7/1267 ,  G11B20/1217 ,  G11B2005/0021 ,  G11B2020/1238

Abstract: A storage device includes a storage controller configured to operate a heat-assisted magnetic recording head to write data to a band of consecutive data tracks in a consecutive track order while selectively alternating a power level of the heat source when writing to some data tracks of the band.