SG124358A1 - Hard disk drive and recording method - Google Patents

Hard disk drive and recording method

Info

Publication number
SG124358A1
SG124358A1 SG200600174A SG200600174A SG124358A1 SG 124358 A1 SG124358 A1 SG 124358A1 SG 200600174 A SG200600174 A SG 200600174A SG 200600174 A SG200600174 A SG 200600174A SG 124358 A1 SG124358 A1 SG 124358A1
Authority
SG
Singapore
Prior art keywords
current
hard disk
disk drive
flows
write head
Prior art date
Application number
SG200600174A
Other languages
English (en)
Inventor
Hiroaki Suzuki
Kenji Okada
Original Assignee
Hitachi Global Storage Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Global Storage Tech filed Critical Hitachi Global Storage Tech
Publication of SG124358A1 publication Critical patent/SG124358A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
    • E01D19/086—Drainage arrangements or devices
    • 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
    • G11B5/465—Arrangements for demagnetisation of heads
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125—Grating or flooring for bridges
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Digital Magnetic Recording (AREA)
SG200600174A 2005-01-14 2006-01-11 Hard disk drive and recording method SG124358A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005007659A JP2006196107A (ja) 2005-01-14 2005-01-14 磁気記録装置及び記録方法

Publications (1)

Publication Number Publication Date
SG124358A1 true SG124358A1 (en) 2006-08-30

Family

ID=36683594

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200600174A SG124358A1 (en) 2005-01-14 2006-01-11 Hard disk drive and recording method

Country Status (5)

Country Link
US (1) US7372653B2 (ko)
JP (1) JP2006196107A (ko)
KR (1) KR20060083152A (ko)
CN (1) CN100433129C (ko)
SG (1) SG124358A1 (ko)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008034006A (ja) * 2006-07-27 2008-02-14 Hitachi Global Storage Technologies Netherlands Bv 記録方法、アンロード方法、および磁気ディスク装置
US7813068B2 (en) * 2008-05-14 2010-10-12 Texas Instruments Incorporated Degauss control for magnetic disk-drive preamplifier
US8503127B2 (en) 2010-11-03 2013-08-06 Texas Instruments Incorporated Method and circuitry for programmably controlling degauss write current decay in hard disk drives
US8537487B2 (en) 2011-07-19 2013-09-17 Lsi Corporation Magnetic storage device with chirped write head degaussing waveform
US8705196B2 (en) 2012-04-16 2014-04-22 Lsi Corporation Storage device having degauss circuitry with separate control of degauss signal steady state and overshoot portions
US8773817B2 (en) 2012-07-24 2014-07-08 Lsi Corporation Storage device having degauss circuitry with ramp generator for use in generating chirped degauss signal
US8737006B2 (en) 2012-09-07 2014-05-27 Lsi Corporation Storage device having degauss circuitry generating degauss signal with multiple decay segments
US8873188B2 (en) 2013-02-28 2014-10-28 Lsi Corporation Storage device having degauss circuitry configured for generating degauss signal with asymmetric decay envelopes
US9280993B2 (en) * 2013-12-12 2016-03-08 HGST Netherlands B.V. Implementing asymmetric degauss control for write head for hard disk drives
CN103956172B (zh) * 2014-03-28 2017-11-07 华为技术有限公司 硬盘及其消磁方法和消磁装置
US9799369B2 (en) 2015-11-24 2017-10-24 Western Digital Technologies, Inc. Switching period control of microwave assisted magnetic recording for pole erasure suppression
US9520148B1 (en) 2015-12-21 2016-12-13 Seagate Technology Llc Reset of magnetic domains in write head via external field
JP6794393B2 (ja) * 2018-03-01 2020-12-02 株式会社東芝 磁気ディスク装置、及びアクチュエータの制御方法
US11594987B1 (en) * 2021-10-29 2023-02-28 Texas Instruments Incorporated Degauss time detection in electric motors

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142705A (ja) * 1983-02-02 1984-08-16 Canon Inc 記録又は再生装置における消去装置
US4821127A (en) * 1985-10-18 1989-04-11 Fuji Photo Film Co., Ltd. Demagnetizing apparatus for erasing signals recorded on concentric tracks
US4970622A (en) * 1986-12-03 1990-11-13 Buechl Josef Method and apparatus for controlling the operation of an electromagnet
JPH0264903A (ja) * 1988-08-30 1990-03-05 Toshiba Corp 磁気記録再生装置のデータ書込み回路
US4970621A (en) * 1988-09-09 1990-11-13 Hewlett-Packard Company Demagnetization of thin film magnetic recording transducers utilizing a decreasing AC current
US5168395A (en) * 1990-05-02 1992-12-01 International Business Machines Corporation Controlled magnetic recording head relaxation in a magnetic recording system
JP2857506B2 (ja) * 1991-03-13 1999-02-17 株式会社日立製作所 磁気記録装置
JPH0573817A (ja) * 1991-06-24 1993-03-26 Sony Corp 磁気抵抗効果素子を有する磁気記録再生装置
JPH07134804A (ja) * 1993-09-17 1995-05-23 Fujitsu Ltd 記録再生装置及び記録再生方法
JPH07147009A (ja) * 1993-09-29 1995-06-06 Matsushita Electric Ind Co Ltd 磁気記録装置
JPH07311922A (ja) * 1994-05-18 1995-11-28 Sony Corp 磁気記録装置
US5499156A (en) * 1994-11-18 1996-03-12 Hughes Aircraft Company Forced, resonant degaussing system and method
JPH097137A (ja) * 1995-06-16 1997-01-10 Sony Corp 磁気記録装置
JP2842351B2 (ja) * 1996-01-09 1999-01-06 日本電気株式会社 磁気ディスク装置のヘッド消磁方法とその回路
US7411756B2 (en) * 2004-02-06 2008-08-12 Agere Systems, Inc. Method and apparatus for write head demagnetization
US7088537B2 (en) * 2004-03-09 2006-08-08 Seagate Technology Llc Removing residual magnetization in a data transducer
US7106536B2 (en) * 2004-09-30 2006-09-12 Agere Systems Inc. Write head demagnetizer

Also Published As

Publication number Publication date
US7372653B2 (en) 2008-05-13
US20060158764A1 (en) 2006-07-20
JP2006196107A (ja) 2006-07-27
CN1805015A (zh) 2006-07-19
CN100433129C (zh) 2008-11-12
KR20060083152A (ko) 2006-07-20

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