公开(公告)号：US20230318257A1

公开(公告)日：2023-10-05

申请号：US17657164

申请日：2022-03-30

Applicant: Seagate Technology LLC

Inventor： Fadi El Hallak ,  Bryn John Howells ,  Michael Gerald Boyle ,  Frank Anthony McGinnity ,  Martin Liam McGarry

IPC: H01S5/024 ,  H01S5/026

CPC classification number: H01S5/02476 ,  H01S5/026 ,  G11B2005/0021

Abstract: A method comprising the steps of forming a recording head comprising a waveguide, a heat sink and a bleed resistor on a first substrate, is described. The bleed resistor is coupled to the heat sink and the substrate. The top surface of the heat sink is planarized to form a planarized heat sink. A laser diode formed on a second substrate is transfer printed onto the planarized heat sink to form an integrated laser diode.

公开(公告)号：US11443764B1

公开(公告)日：2022-09-13

申请号：US16291491

申请日：2019-03-04

Applicant: Seagate Technology LLC

Inventor： Choon How Gan ,  Mark Anthony Gubbins ,  Beverley Rutherford McConnell ,  Martin Peter McCurry ,  Michael James Hardy ,  Andres David Barbosa Neira ,  Fadi El Hallak ,  Anil Kumar Puri

IPC: G11B5/48 ,  G11B5/31 ,  G02B6/122 ,  G11B13/08 ,  G11B5/00

Abstract: An apparatus includes a slider configured for heat-assisted magnetic recording. The slider includes an input coupler configured to receive light excited by a light source. The slider includes a waveguide core tapering along a light propagation direction from a first cross-sectional width to a second cross-sectional width, the waveguide configured to provide a surface plasmon-enhanced near-field radiation pattern proximate an output end in response to the received light. One or more cladding layers surround the waveguide core. At least one strip of plasmonic material is disposed between the waveguide core and at least one of the one or more cladding layers.

公开(公告)号：US10692525B2

公开(公告)日：2020-06-23

申请号：US16136389

申请日：2018-09-20

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Kelly Elizabeth Callan ,  Reyad Mehfuz ,  Marcus B. Mooney ,  Fadi El Hallak ,  Paula Frances McElhinney

IPC: G11B7/126 ,  G11B11/105 ,  G11B5/48 ,  G11B5/00 ,  G11B7/1263 ,  G11B7/1267 ,  G11B5/60

Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.

公开(公告)号：US20200098391A1

公开(公告)日：2020-03-26

申请号：US16136389

申请日：2018-09-20

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Kelly Elizabeth Callan ,  Reyad Mehfuz ,  Marcus B. Mooney ,  Fadi El Hallak ,  Paula Frances McElhinney

IPC: G11B7/126 ,  G11B5/48

Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.

公开(公告)号：US09792937B1

公开(公告)日：2017-10-17

申请号：US15205511

申请日：2016-07-08

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  Paula Frances McElhinney ,  Fadi El Hallak

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

CPC classification number: G11B5/4866 ,  G02B6/1228 ,  G02B6/126 ,  G02B6/132 ,  G02B6/136 ,  G02B6/2726 ,  G02B6/2766 ,  G11B5/6088 ,  G11B7/1387 ,  G11B11/10506 ,  G11B11/1051 ,  G11B2005/0021

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.