CN1308919C - 具有浮置拖尾屏蔽的垂直记录头 - Google Patents

具有浮置拖尾屏蔽的垂直记录头 Download PDF

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Publication number
CN1308919C
CN1308919C CNB2004100118033A CN200410011803A CN1308919C CN 1308919 C CN1308919 C CN 1308919C CN B2004100118033 A CNB2004100118033 A CN B2004100118033A CN 200410011803 A CN200410011803 A CN 200410011803A CN 1308919 C CN1308919 C CN 1308919C
Authority
CN
China
Prior art keywords
trailing shield
pole piece
floating
magnetic recording
magnetic
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CNB2004100118033A
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English (en)
Chinese (zh)
Other versions
CN1601609A (zh
Inventor
徐一民
李邝
马森·L·威廉斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HGST Netherlands BV
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
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 Technologies Netherlands BV filed Critical Hitachi Global Storage Technologies Netherlands BV
Publication of CN1601609A publication Critical patent/CN1601609A/zh
Application granted granted Critical
Publication of CN1308919C publication Critical patent/CN1308919C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • G11B5/315—Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
CNB2004100118033A 2003-09-26 2004-09-23 具有浮置拖尾屏蔽的垂直记录头 Expired - Fee Related CN1308919C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/671,639 US7196871B2 (en) 2003-09-26 2003-09-26 Head for perpendicular recording with a floating trailing shield
US10/671,639 2003-09-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CNB2006101432597A Division CN100555419C (zh) 2003-09-26 2004-09-23 具有浮置拖尾屏蔽的垂直记录头

Publications (2)

Publication Number Publication Date
CN1601609A CN1601609A (zh) 2005-03-30
CN1308919C true CN1308919C (zh) 2007-04-04

Family

ID=34376166

Family Applications (2)

Application Number Title Priority Date Filing Date
CNB2006101432597A Expired - Fee Related CN100555419C (zh) 2003-09-26 2004-09-23 具有浮置拖尾屏蔽的垂直记录头
CNB2004100118033A Expired - Fee Related CN1308919C (zh) 2003-09-26 2004-09-23 具有浮置拖尾屏蔽的垂直记录头

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CNB2006101432597A Expired - Fee Related CN100555419C (zh) 2003-09-26 2004-09-23 具有浮置拖尾屏蔽的垂直记录头

Country Status (3)

Country Link
US (2) US7196871B2 (enExample)
JP (1) JP2005108411A (enExample)
CN (2) CN100555419C (enExample)

Families Citing this family (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7729092B1 (en) * 2002-11-07 2010-06-01 Seagate Technology Llc Shielded pole writer under reader
US7508624B1 (en) * 2003-08-01 2009-03-24 Lauer Mark A Transducers for perpendicular recording with write pole tip angled toward media
US7196871B2 (en) * 2003-09-26 2007-03-27 Hitachi Global Storage Technologies Netherlands B.V. Head for perpendicular recording with a floating trailing shield
US7042682B2 (en) * 2003-10-17 2006-05-09 Headway Technologies, Inc. Fully shielded perpendicular recoding writer
JP4260002B2 (ja) * 2003-12-24 2009-04-30 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ 磁気ヘッドとその製造方法および磁気記録再生装置
US7239478B1 (en) * 2004-01-31 2007-07-03 Western Digital (Fremont), Inc. Write element for perpendicular recording in a data storage system
JP4118246B2 (ja) * 2004-03-31 2008-07-16 Ｔｄｋ株式会社 垂直磁気記録ヘッド及びその製造方法
US20050219743A1 (en) * 2004-04-06 2005-10-06 Headway Technologies, Inc. Perpendicular write head with tapered main pole
US7253991B2 (en) * 2004-04-30 2007-08-07 Hitachi Global Storage Technologies Netherlands B.V. Planar perpendicular recording head
US7414816B2 (en) * 2004-05-28 2008-08-19 Hitachi Global Storage Technologies Netherlands B.V. Planar magnetic thin film head
US7649712B2 (en) * 2004-08-31 2010-01-19 Hitachi Global Storage Technologies Netherlands B.V. Self aligned wrap around shield for perpendicular magnetic recording
JP3892023B2 (ja) * 2004-11-05 2007-03-14 Ｔｄｋ株式会社 垂直磁気記録ヘッドおよびその製造方法、ならびに磁気記録装置
KR100668313B1 (ko) * 2004-11-15 2007-01-12 삼성전자주식회사 자기 기록 헤드
US7903372B2 (en) * 2005-01-11 2011-03-08 Samsung Electronics Co., Ltd. Magnetic recording head and method of manufacturing the same
US7869160B1 (en) * 2005-04-27 2011-01-11 Western Digital (Fremont), Llc Perpendicular recording head with shaped pole surfaces for higher linear data densities
KR100718127B1 (ko) * 2005-04-28 2007-05-14 삼성전자주식회사 수직 자기 기록헤드
US7573683B1 (en) * 2005-07-08 2009-08-11 Maxtor Corporation Write heads with floating side shields and manufacturing methods
JP2007035082A (ja) * 2005-07-22 2007-02-08 Hitachi Global Storage Technologies Netherlands Bv 垂直記録用磁気ヘッド及びその製造方法
US20070035878A1 (en) * 2005-08-10 2007-02-15 Hung-Chin Guthrie Perpendicular head with self-aligned notching trailing shield process
JP2007122840A (ja) * 2005-10-31 2007-05-17 Toshiba Corp 垂直磁気記録装置
US8054586B2 (en) * 2005-11-23 2011-11-08 Hitachi Global Storage Technologies Netherlands B.V. Write head design and method for reducing adjacent track interference at very narrow track widths
US20070183093A1 (en) * 2006-02-07 2007-08-09 Quang Le Protective layer for CMP assisted lift-off process and method of fabrication
JP4852330B2 (ja) * 2006-03-15 2012-01-11 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ 垂直磁気記録ヘッド及びその製造方法
US7821736B2 (en) * 2006-04-06 2010-10-26 Hitachi Global Storage Technologies Netherlands, B.V. Shaped trailing shield of a perpendicular recording write element
US7532432B2 (en) * 2006-04-24 2009-05-12 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording system with medium having thin soft underlayer and recording head having thick-throat trailing shield
US7576951B2 (en) * 2006-04-25 2009-08-18 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic write head having a magnetic write pole with a concave trailing edge
US7712206B2 (en) * 2006-05-22 2010-05-11 Hitachi Global Storage Technologies Netherlands B.V. Method for manufacturing a magnetic write head having a trailing shield with an accurately controlled trailing shield gap thickness
US7768741B2 (en) * 2006-05-22 2010-08-03 Hitachi Global Storage Technologies Netherlands B.V. Magnetic write head design for reducing wide area track erasure
US7639453B2 (en) * 2006-08-01 2009-12-29 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic write head with shunt structure to prevent read sensor interference
US7715147B2 (en) * 2006-10-27 2010-05-11 Hitachi Global Storage Technologies Netherlands B.V. Magnetic write head having a shield that extends below the leading edge of the write pole
US8689430B1 (en) 2006-11-29 2014-04-08 Western Digital (Fremont), Llc Method for providing a perpendicular magnetic recording (PMR)head
JP2008198326A (ja) * 2007-01-17 2008-08-28 Hitachi Ltd 磁気ヘッドおよびこれを搭載した磁気ディスク装置
US7467461B2 (en) * 2007-03-20 2008-12-23 Hitachi Global Storage Technologies Netherlands B.V. Additive gap process to define trailing and side shield gap for a perpendicular write head
JP2008276817A (ja) * 2007-04-25 2008-11-13 Tdk Corp 垂直磁気記録ヘッド
US7768744B2 (en) * 2007-05-02 2010-08-03 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording write head with coplanar main pole and return poles and magnetic recording system
US8051552B2 (en) * 2007-05-11 2011-11-08 Hitachi Global Storage Technologies Netherlands, B.V. Stitched wrap around shield fabrication for perpendicular magnetic recording write heads
US7995307B2 (en) * 2007-07-19 2011-08-09 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording write head with trailing shield having throat height defined by electroplated nonmagnetic pad layer and method for making the head
US8015692B1 (en) 2007-11-07 2011-09-13 Western Digital (Fremont), Llc Method for providing a perpendicular magnetic recording (PMR) head
US7788798B2 (en) * 2007-11-21 2010-09-07 Hitachi Global Storage Technologies Netherlands B.V. Method for manufacturing a perpendicular magnetic write head with wrap around magnetic trailing and side shields
US7990651B2 (en) 2007-12-13 2011-08-02 Hitachi Global Storage Technologies Netherlands B.V. Method of manufacturing a perpendicular magnetic write head with stepped trailing magnetic shield with electrical lapping guide control
US7881010B2 (en) * 2007-12-13 2011-02-01 Hitachi Global Storage Technologies Netherlands B.V. Process for self-aligned flare point and shield throat definition prior to main pole patterning
US20090195920A1 (en) * 2008-01-31 2009-08-06 Bonhote Christian R Main pole bridge structure
US8179636B1 (en) * 2008-03-05 2012-05-15 Western Digital (Fremont), Llc Method and system for providing a perpendicular magnetic recording writer
US8305709B2 (en) * 2008-08-08 2012-11-06 Tdk Corporation Perpendicular magnetic head and magnetic recording system having non-magnetic region in shield layer
US8276258B1 (en) 2008-08-26 2012-10-02 Western Digital (Fremont), Llc Method for fabricating a magnetic recording transducer
US8166631B1 (en) 2008-08-27 2012-05-01 Western Digital (Fremont), Llc Method for fabricating a magnetic recording transducer having side shields
US8720044B1 (en) 2008-09-26 2014-05-13 Western Digital (Fremont), Llc Method for manufacturing a magnetic recording transducer having side shields
US8231796B1 (en) 2008-12-09 2012-07-31 Western Digital (Fremont), Llc Method and system for providing a magnetic recording transducer having side shields
US8472286B2 (en) * 2008-12-31 2013-06-25 HGST Netherlands B.V. Near field transducer having main body and wings extending therefrom and only electrically coupled thereby
US8291743B1 (en) * 2009-05-27 2012-10-23 Western Digital (Fremont), Llc Method and system for calibrating an electronic lapping guide for a beveled pole in a magnetic recording transducer
US8472136B2 (en) * 2009-07-13 2013-06-25 Seagate Technology Llc Write pole with a synthesized low magnetization shield
JP4693923B2 (ja) * 2009-09-29 2011-06-01 株式会社東芝 磁気ヘッド、およびこれを備えたディスク装置
US8411390B2 (en) * 2009-10-16 2013-04-02 Hitachi Global Storage Technologies Netherlands B.V. Integrated half coil structure for write assist of high coercivity media
US8451560B2 (en) * 2009-12-09 2013-05-28 HGST Netherlands B.V. Magnetic head with flared write pole with multiple non-magnetic layers thereover
US8498078B2 (en) * 2009-12-09 2013-07-30 HGST Netherlands B.V. Magnetic head with flared write pole having multiple tapered regions
US8553360B2 (en) * 2009-12-09 2013-10-08 HGST Netherlands B.V. Magnetic recording head having write pole with higher magnetic moment towards trailing edge
US8233235B2 (en) * 2009-12-09 2012-07-31 Hitachi Global Storage Technologies Netherlands B.V. PMR writer having a tapered write pole and bump layer and method of fabrication
US8422177B2 (en) 2010-04-30 2013-04-16 Seagate Technology Llc Reader shield with tilted magnetization
US8902548B2 (en) 2010-04-30 2014-12-02 Seagate Technology Llc Head with high readback resolution
US8477453B2 (en) * 2010-05-05 2013-07-02 Headway Technologies, Inc. Perpendicular magnetic recording write head with milling defined track width
JP4956661B2 (ja) * 2010-10-15 2012-06-20 株式会社東芝 磁気ヘッド、およびこれを備えたディスク装置
US8254059B2 (en) 2010-12-06 2012-08-28 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording head with domain controlled side shield
US8797686B1 (en) 2010-12-23 2014-08-05 Western Digital (Fremont), Llc Magnetic recording transducer with short effective throat height and method of fabrication
US8587900B2 (en) 2011-05-24 2013-11-19 HGST Netherlands B.V. Radiator-cooled nanowire-based write assist
US8451563B1 (en) 2011-12-20 2013-05-28 Western Digital (Fremont), Llc Method for providing a side shield for a magnetic recording transducer using an air bridge
US8628672B1 (en) 2012-06-27 2014-01-14 Western Digital (Fremont), Llc Process for manufacturing a perpendicular magnetic recording writer pole with nonmagnetic bevel
US8980109B1 (en) 2012-12-11 2015-03-17 Western Digital (Fremont), Llc Method for providing a magnetic recording transducer using a combined main pole and side shield CMP for a wraparound shield scheme
US8914969B1 (en) 2012-12-17 2014-12-23 Western Digital (Fremont), Llc Method for providing a monolithic shield for a magnetic recording transducer
US9042051B2 (en) 2013-08-15 2015-05-26 Western Digital (Fremont), Llc Gradient write gap for perpendicular magnetic recording writer
US9082423B1 (en) 2013-12-18 2015-07-14 Western Digital (Fremont), Llc Magnetic recording write transducer having an improved trailing surface profile
US20250124947A1 (en) * 2023-10-17 2025-04-17 International Business Machines Corporation Probe head with trailing shield for magnetic recording on tape

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1139795A (zh) * 1995-06-30 1997-01-08 大宇电子株式会社 多路型薄膜磁头组件及制造方法
JP2001331909A (ja) * 2000-05-23 2001-11-30 Tdk Corp 薄膜磁気ヘッドおよびその製造方法
CN1356691A (zh) * 2000-11-28 2002-07-03 三星电子株式会社 磁头

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559294B1 (fr) * 1984-02-03 1988-08-12 Commissariat Energie Atomique Nouvelle tete magnetique d'ecriture et de lecture pour enregistrement perpendiculaire et son procede de fabrication
US4656546A (en) * 1985-01-22 1987-04-07 Digital Equipment Corporation Vertical magnetic recording arrangement
US5075956A (en) * 1988-03-16 1991-12-31 Digital Equipment Corporation Method of making recording heads with side shields
FR2645315B1 (fr) * 1989-03-29 1991-05-31 Commissariat Energie Atomique Tete magnetique de lecture a magnetoresistance pour enregistrement perpendiculaire et procede de realisation d'une telle tete
US5550691A (en) 1989-11-27 1996-08-27 Censtor Corp. Size-independent, rigid-disk, magnetic, digital-information storage system with localized read/write enhancements
US5550891A (en) * 1992-03-13 1996-08-27 Olympic Controls Corp. Positioning apparatus for X-ray source
US5408373A (en) * 1993-03-15 1995-04-18 International Business Machines Corporation Integrated transducer-suspension assembly for vertical recording
US6407891B1 (en) * 1999-05-24 2002-06-18 International Business Machines Corporation Magnetic read/write head having electromagnetic field cancellation element
US6531202B1 (en) * 1999-11-29 2003-03-11 Seagate Technology Llc Perpendicular magnetic recording media with reduced-noise soft magnetic underlayer
US6710973B2 (en) * 2000-09-18 2004-03-23 Hitachi, Ltd. Single pole type recording head including tapered edges
US6595955B2 (en) * 2001-03-15 2003-07-22 Specialized Health Products, Inc. Safety shield for medical needles
US6954340B2 (en) * 2001-05-23 2005-10-11 Seagate Technology Llc Perpendicular magnetic recording head with nonmagnetic write gap greater than twice side shield gap distance
US6809899B1 (en) * 2001-08-20 2004-10-26 Western Digital (Fremont), Inc. Magnetic heads for perpendicular recording with trapezoidal pole tips
US6943992B2 (en) * 2001-08-30 2005-09-13 Headway Technologies, Inc. Inverted write head for vertical recording
US20030117749A1 (en) * 2001-12-20 2003-06-26 Shukh Alexander M. Perpendicular read/write head for use in a disc drive storage system
JP4088453B2 (ja) 2002-02-14 2008-05-21 株式会社日立グローバルストレージテクノロジーズ 垂直記録用磁気ヘッド及びそれを搭載した磁気ディスク装置
US6842313B1 (en) * 2002-04-08 2005-01-11 Maxtor Corporation Floating down stream perpendicular write head shield
US6965494B2 (en) * 2002-05-13 2005-11-15 Robert Owen Campbell Magnetic recording head having a first pole for generating an easy axis field and an auxiliary pole for generating a first auxiliary hard axis field that opposes an initial hard axis field
US6950277B1 (en) * 2002-10-25 2005-09-27 Maxtor Corporation Concave trailing edge write pole for perpendicular recording
JP4033795B2 (ja) * 2002-11-28 2008-01-16 株式会社日立グローバルストレージテクノロジーズ 磁気記録媒体及びそれを搭載した磁気記録装置
US7196871B2 (en) * 2003-09-26 2007-03-27 Hitachi Global Storage Technologies Netherlands B.V. Head for perpendicular recording with a floating trailing shield

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1139795A (zh) * 1995-06-30 1997-01-08 大宇电子株式会社 多路型薄膜磁头组件及制造方法
JP2001331909A (ja) * 2000-05-23 2001-11-30 Tdk Corp 薄膜磁気ヘッドおよびその製造方法
CN1356691A (zh) * 2000-11-28 2002-07-03 三星电子株式会社 磁头

Also Published As

Publication number Publication date
CN1601609A (zh) 2005-03-30
US7440230B2 (en) 2008-10-21
US20070146930A1 (en) 2007-06-28
JP2005108411A (ja) 2005-04-21
US20050068669A1 (en) 2005-03-31
CN100555419C (zh) 2009-10-28
US7196871B2 (en) 2007-03-27
CN101059962A (zh) 2007-10-24

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Granted publication date: 20070404

Termination date: 20100923