SG10201500608WA - Thermally-assisted magnetic recording head that suppresses effects of mode hopping - Google Patents
Thermally-assisted magnetic recording head that suppresses effects of mode hoppingInfo
- Publication number
- SG10201500608WA SG10201500608WA SG10201500608WA SG10201500608WA SG10201500608WA SG 10201500608W A SG10201500608W A SG 10201500608WA SG 10201500608W A SG10201500608W A SG 10201500608WA SG 10201500608W A SG10201500608W A SG 10201500608WA SG 10201500608W A SG10201500608W A SG 10201500608WA
- Authority
- SG
- Singapore
- Prior art keywords
- thermally
- recording head
- magnetic recording
- assisted magnetic
- mode hopping
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
- G11B5/314—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4866—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives the arm comprising an optical waveguide, e.g. for thermally-assisted recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/60—Fluid-dynamic spacing of heads from record-carriers
- G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
- G11B5/6088—Optical waveguide in or on flying head
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/165,367 US8908481B1 (en) | 2014-01-27 | 2014-01-27 | Thermally-assisted magnetic recording head that suppresses effects of mode hopping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SG10201500608WA true SG10201500608WA (en) | 2015-08-28 |
Family
ID=52001705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SG10201500608WA SG10201500608WA (en) | 2014-01-27 | 2015-01-26 | Thermally-assisted magnetic recording head that suppresses effects of mode hopping |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8908481B1 (en) |
| JP (1) | JP5945017B2 (en) |
| KR (1) | KR20150099405A (en) |
| CN (1) | CN104810027B (en) |
| DE (1) | DE102015000956A1 (en) |
| GB (1) | GB2522785B (en) |
| IE (1) | IE86844B1 (en) |
| IN (1) | IN2015DE00223A (en) |
| SG (1) | SG10201500608WA (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9281659B1 (en) | 2014-09-22 | 2016-03-08 | Seagate Technology Llc | Thermal management of laser diode mode hopping for heat assisted media recording |
| US9236081B1 (en) * | 2015-03-31 | 2016-01-12 | Seagate Technology Llc | Laser temperature calibration in a HAMR device |
| US9679594B1 (en) * | 2015-07-20 | 2017-06-13 | Seagate Technology Llc | Reflector configured to prevent reflection from a recording medium to an energy source |
| US9466320B1 (en) | 2015-10-21 | 2016-10-11 | Headway Technologies, Inc. | Thermal assisted magnetic recording light delivery waveguide circuit for reduced stray light induced writer protrusion |
| US9984719B2 (en) * | 2015-12-02 | 2018-05-29 | Seagate Technology Llc | Laser mode hopping detection for heat-assisted magnetic recording device |
| US10255940B1 (en) | 2016-01-19 | 2019-04-09 | Seagate Technology Llc | Sensorless monitoring of laser power instability in a heat-assisted magnetic recording head |
| US10366722B1 (en) * | 2017-05-15 | 2019-07-30 | Seagate Technology Llc | Laser mode hop detection in a heat-assisted magnetic recording device using a slider sensor and laser modulation |
| JP2021047951A (en) * | 2019-09-19 | 2021-03-25 | 株式会社東芝 | Magnetic disk device and write processing method |
| US11341992B1 (en) | 2021-02-08 | 2022-05-24 | Seagate Technology Llc | Multiple path optical isolator in heat-assisted magnetic recording device |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4528670A (en) * | 1983-02-25 | 1985-07-09 | At&T Bell Laboratories | Short coupled cavity laser |
| JPS61142785A (en) | 1984-12-15 | 1986-06-30 | Sharp Corp | Semiconductor laser device |
| JPS621295A (en) | 1985-06-26 | 1987-01-07 | Sharp Corp | Semiconductor laser |
| JPS6254991A (en) * | 1985-09-04 | 1987-03-10 | Hitachi Ltd | Semiconductor laser |
| JPH0797689B2 (en) | 1987-05-18 | 1995-10-18 | 株式会社東芝 | Semiconductor laser device |
| US5022042A (en) | 1990-09-10 | 1991-06-04 | General Dynamics Corp. | High power laser array with stable wavelength |
| US5392308A (en) * | 1993-01-07 | 1995-02-21 | Sdl, Inc. | Semiconductor laser with integral spatial mode filter |
| JP3226065B2 (en) | 1993-06-28 | 2001-11-05 | キヤノン株式会社 | Single wavelength semiconductor laser |
| JPH1116188A (en) | 1997-06-26 | 1999-01-22 | Victor Co Of Japan Ltd | Semiconductor laser and optical pickup |
| JP3337403B2 (en) | 1997-09-19 | 2002-10-21 | 日本電信電話株式会社 | Frequency stabilized laser |
| JP2000012965A (en) | 1998-06-24 | 2000-01-14 | Sony Corp | Semiconductor laser |
| JP2002184010A (en) * | 2000-12-08 | 2002-06-28 | Hitachi Ltd | Optical disk device |
| US6975580B2 (en) * | 2001-12-18 | 2005-12-13 | Interntional Business Machines Corporation | Optical aperture for data recording having transmission enhanced by waveguide mode resonance |
| JP3873909B2 (en) | 2003-02-28 | 2007-01-31 | 住友電気工業株式会社 | Fiber grating laser module and method for generating optical signal |
| US20060002443A1 (en) * | 2004-06-30 | 2006-01-05 | Gennady Farber | Multimode external cavity semiconductor lasers |
| JP2008059645A (en) | 2006-08-30 | 2008-03-13 | Hitachi Ltd | Recording head |
| JP5007651B2 (en) * | 2007-02-08 | 2012-08-22 | ソニー株式会社 | Near-field light generating apparatus, near-field light generating method, and information recording / reproducing apparatus |
| JP5085988B2 (en) | 2007-06-21 | 2012-11-28 | 株式会社日立製作所 | Manufacturing method of optical element integrated head |
| US8223459B2 (en) | 2008-06-12 | 2012-07-17 | Seagate Technology Llc | Laser on slider for a heat assisted magnetic recording head |
| WO2010010806A1 (en) | 2008-07-24 | 2010-01-28 | コニカミノルタオプト株式会社 | Optical recording head and optical recording device |
| JP4848447B2 (en) | 2009-07-06 | 2011-12-28 | 株式会社日立製作所 | Information recording / reproducing head and heat-assisted magnetic recording apparatus |
| JP4881989B2 (en) * | 2009-10-15 | 2012-02-22 | 株式会社日立製作所 | Magnetic head for thermally assisted recording and magnetic recording apparatus using the same |
| US8385183B2 (en) * | 2009-11-05 | 2013-02-26 | Seagate Technology, Llc | Light delivery waveguide |
| US8228634B2 (en) | 2010-01-07 | 2012-07-24 | Headway Technologies, Inc. | Integrated focusing elements for TAMR light delivery system |
| JP2011187111A (en) | 2010-03-05 | 2011-09-22 | Hitachi Ltd | Head for thermally-assisted magnetic recording, and thermal assisted magnetic recording device |
| US8957692B2 (en) * | 2010-12-02 | 2015-02-17 | Tdk Corporation | Method for performing burn-in test |
-
2014
- 2014-01-27 US US14/165,367 patent/US8908481B1/en active Active
-
2015
- 2015-01-26 IE IE20150020A patent/IE86844B1/en unknown
- 2015-01-26 SG SG10201500608WA patent/SG10201500608WA/en unknown
- 2015-01-26 GB GB1501219.8A patent/GB2522785B/en active Active
- 2015-01-27 KR KR1020150013086A patent/KR20150099405A/en not_active Application Discontinuation
- 2015-01-27 DE DE102015000956.7A patent/DE102015000956A1/en active Pending
- 2015-01-27 JP JP2015013048A patent/JP5945017B2/en active Active
- 2015-01-27 CN CN201510040982.1A patent/CN104810027B/en active Active
- 2015-01-27 IN IN223DE2015 patent/IN2015DE00223A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN104810027B (en) | 2018-01-02 |
| GB2522785A (en) | 2015-08-05 |
| JP2015141731A (en) | 2015-08-03 |
| GB201501219D0 (en) | 2015-03-11 |
| US8908481B1 (en) | 2014-12-09 |
| GB2522785B (en) | 2016-04-06 |
| IN2015DE00223A (en) | 2015-07-31 |
| KR20150099405A (en) | 2015-08-31 |
| JP5945017B2 (en) | 2016-07-05 |
| CN104810027A (en) | 2015-07-29 |
| IE86844B1 (en) | 2017-11-29 |
| DE102015000956A1 (en) | 2015-07-30 |
| IE20150020A1 (en) | 2015-07-29 |
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