CN101261839A - 具有阶梯式展开结构的垂直写头及其制造方法 - Google Patents
具有阶梯式展开结构的垂直写头及其制造方法 Download PDFInfo
- Publication number
- CN101261839A CN101261839A CNA2008100806671A CN200810080667A CN101261839A CN 101261839 A CN101261839 A CN 101261839A CN A2008100806671 A CNA2008100806671 A CN A2008100806671A CN 200810080667 A CN200810080667 A CN 200810080667A CN 101261839 A CN101261839 A CN 101261839A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- write
- partly
- shell
- writing
- 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.)
- Granted
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Classifications
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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
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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
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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
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/11—Shielding of head against electric or magnetic fields
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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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
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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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
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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
- G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
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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
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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
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
- G11B5/3166—Testing or indicating in relation thereto, e.g. before the fabrication is completed
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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
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
- G11B5/3169—Working or finishing the interfacing surface of heads, e.g. lapping of heads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
- Y10T29/49039—Fabricating head structure or component thereof including measuring or testing with dual gap materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
- Y10T29/49043—Depositing magnetic layer or coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
- Y10T29/49043—Depositing magnetic layer or coating
- Y10T29/49044—Plural magnetic deposition layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
- Y10T29/49043—Depositing magnetic layer or coating
- Y10T29/49046—Depositing magnetic layer or coating with etching or machining of magnetic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
- Y10T29/49052—Machining magnetic material [e.g., grinding, etching, polishing] by etching
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Heads (AREA)
Abstract
Description
Claims (28)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/683,972 US8634162B2 (en) | 2007-03-08 | 2007-03-08 | Perpendicular write head having a stepped flare structure and method of manufacture thereof |
US11/683,972 | 2007-03-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101261839A true CN101261839A (zh) | 2008-09-10 |
CN101261839B CN101261839B (zh) | 2012-06-27 |
Family
ID=39774429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2008100806671A Active CN101261839B (zh) | 2007-03-08 | 2008-02-28 | 具有阶梯式展开结构的垂直写头及其制造方法 |
Country Status (4)
Country | Link |
---|---|
US (4) | US8634162B2 (zh) |
JP (1) | JP5775653B2 (zh) |
KR (1) | KR20080082452A (zh) |
CN (1) | CN101261839B (zh) |
Families Citing this family (43)
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US7558020B2 (en) * | 2004-11-12 | 2009-07-07 | Headway Technologies, Inc. | Thin-film magnetic head structure having a magnetic pole tip with an even width portion method of manufacturing thereof, and thin-film magnetic head having a magnetic pole tip with an even width portion |
US7813077B2 (en) * | 2006-08-31 | 2010-10-12 | International Business Machines Corporation | Apparatus, system, and method for detecting a periodic sequence of servo signals |
US8634162B2 (en) * | 2007-03-08 | 2014-01-21 | HGST Netherlands B.V. | Perpendicular write head having a stepped flare structure and method of manufacture thereof |
JP2008243244A (ja) * | 2007-03-26 | 2008-10-09 | Tdk Corp | 垂直磁気記録ヘッド及びその製造方法 |
US8289650B2 (en) * | 2007-09-19 | 2012-10-16 | Seagate Technology Llc | HAMR recording head having a sloped wall pole |
US8049989B2 (en) * | 2007-12-26 | 2011-11-01 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic head for perpendicular recording having stepped wrap around shield with independent control of write pole track width and flare point dimensions |
US8649123B1 (en) * | 2008-11-26 | 2014-02-11 | Western Digital (Fremont), Llc | Method to eliminate reactive ion etching (RIE) loading effects for damascene perpendicular magnetic recording (PMR) fabrication |
JP2010146600A (ja) * | 2008-12-16 | 2010-07-01 | Hitachi Global Storage Technologies Netherlands Bv | 垂直磁気記録ヘッド、その製造方法及び磁気記録再生装置 |
JP2010146641A (ja) * | 2008-12-19 | 2010-07-01 | Hitachi Global Storage Technologies Netherlands Bv | 垂直記録用磁気ヘッドとその製造方法及びそれを用いた磁気ディスク装置 |
US8808524B2 (en) * | 2009-01-27 | 2014-08-19 | Seagate Technology Llc | Direct electrodeposition of magnetic recording head features |
US20110075299A1 (en) * | 2009-09-30 | 2011-03-31 | Olson Trevor W | Magnetic write heads for hard disk drives and method of forming same |
US8724258B2 (en) * | 2009-09-30 | 2014-05-13 | HGST Netherlands B.V. | Slanted bump design for magnetic shields in perpendicular write heads and method of making same |
US8449752B2 (en) * | 2009-09-30 | 2013-05-28 | HGST Netherlands B.V. | Trailing plated step |
JP2011108320A (ja) * | 2009-11-17 | 2011-06-02 | Hitachi Global Storage Technologies Netherlands Bv | 磁気ヘッド及びその製造方法 |
US8441757B2 (en) * | 2009-12-09 | 2013-05-14 | HGST Netherlands B.V. | Perpendicular magnetic write head with wrap-around shield, slanted pole and slanted pole bump fabricated by damascene process |
US8451562B2 (en) | 2010-04-23 | 2013-05-28 | HGST Netherlands B.V. | Method for manufacturing a magnetic write head having a wrap around trailing magnetic shield with a tapered side gap |
US8453317B2 (en) | 2010-10-14 | 2013-06-04 | HGST Netherlands, B.V. | Magnetic write head fabrication with integrated electrical lapping guides |
US8889018B2 (en) | 2010-11-23 | 2014-11-18 | HGST Netherlands B.V. | Method for manufacturing a magnetic write pole using a multi-layered hard mask structure |
US8801944B2 (en) * | 2012-11-28 | 2014-08-12 | HGST Netherlands B.V. | Method for manufacturing a magnetic write head using novel mask structure |
US9082426B1 (en) * | 2012-12-19 | 2015-07-14 | Western Digital (Fremont), Llc | Methods for manufacturing electronic lapping guides for writer heads that closely track pole formation of the writer heads |
US8921126B2 (en) | 2013-01-25 | 2014-12-30 | Headway Technologies, Inc. | Magnetic seed method for improving blocking temperature and shield to shield spacing in a TMR sensor |
US8947834B2 (en) * | 2013-03-12 | 2015-02-03 | Seagate Technology Llc | Method and apparatus for chemical-mechanical polishing |
US20140268417A1 (en) * | 2013-03-16 | 2014-09-18 | Seagate Technology Llc | Bottom shield stabilized magnetic seed layer |
US8817418B1 (en) * | 2013-08-15 | 2014-08-26 | Tdk Corporation | Magnetic head for perpendicular magnetic recording having a write shield |
US8837083B1 (en) * | 2013-08-23 | 2014-09-16 | Headway Technologies, Inc. | Magnetic head for perpendicular magnetic recording including a heater |
US9280990B1 (en) | 2013-12-11 | 2016-03-08 | Western Digital (Fremont), Llc | Method for fabricating a magnetic writer using multiple etches |
US9305583B1 (en) | 2014-02-18 | 2016-04-05 | Western Digital (Fremont), Llc | Method for fabricating a magnetic writer using multiple etches of damascene materials |
US8988825B1 (en) | 2014-02-28 | 2015-03-24 | Western Digital (Fremont, LLC | Method for fabricating a magnetic writer having half-side shields |
US10003014B2 (en) * | 2014-06-20 | 2018-06-19 | International Business Machines Corporation | Method of forming an on-pitch self-aligned hard mask for contact to a tunnel junction using ion beam etching |
KR102257901B1 (ko) * | 2014-09-19 | 2021-05-31 | 삼성전자주식회사 | 반도체 검사 장비 및 이를 이용한 반도체 소자의 검사 방법 |
US9972345B1 (en) | 2015-12-18 | 2018-05-15 | Seagate Technology Llc | Method for making a write head for magnetic recording |
US11031032B1 (en) * | 2017-04-03 | 2021-06-08 | Seagate Technology Llc | Cryogenic magnetic alloys with less grain refinement dopants |
US10014012B1 (en) | 2017-06-23 | 2018-07-03 | Western Digital Technologies, Inc. | Spin-orbit torque based magnetic recording |
US10181334B1 (en) | 2017-06-23 | 2019-01-15 | Western Digital Technologies, Inc. | Spin-orbit torque based magnetic recording |
US10157632B1 (en) | 2017-06-23 | 2018-12-18 | Western Digital Technologies, Inc. | Areal density capability improvement with spin-orbit torque based structures surrounding main pole tip |
US10210888B1 (en) | 2017-06-23 | 2019-02-19 | Western Digital Technologies, Inc. | Dual spin-orbit torque oscillator in magnetic recording |
US10734014B2 (en) | 2017-06-23 | 2020-08-04 | Western Digital Technologies, Inc. | Areal density capability improvement with a main pole skin |
US10141014B1 (en) | 2017-07-28 | 2018-11-27 | Seagate Technology Llc | Write head with reduced trailing shield—side shield spacing |
US10734015B1 (en) | 2018-02-20 | 2020-08-04 | Western Digital Technologies, Inc. | Magnetic recording write head having YIG-heavy metal-YIG in write gap and side gap to maximize spin-orbit-coupling efficiency |
US10891976B1 (en) | 2019-04-24 | 2021-01-12 | Western Digital Technologies, Inc. | Areal density capability improvement with a main pole skin |
KR20210020292A (ko) * | 2019-08-14 | 2021-02-24 | 현대자동차주식회사 | 차량용 스피커 그릴 제조방법 |
US11127421B1 (en) * | 2020-07-30 | 2021-09-21 | Western Digital Technologies, Inc. | Heat-assisted magnetic recording (HAMR) write head with improved corrosion resistance and method for making the head |
US11657837B2 (en) | 2021-05-19 | 2023-05-23 | Western Digital Technologies, Inc. | Magnetic recording head with trailing shield having multiple throat-heights |
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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 |
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JP2005285306A (ja) * | 2004-03-05 | 2005-10-13 | Tdk Corp | 薄膜磁気ヘッド |
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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 |
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JP4763264B2 (ja) * | 2004-10-25 | 2011-08-31 | 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 | 垂直記録用磁気ヘッド |
US7446980B2 (en) * | 2004-10-29 | 2008-11-04 | Hitachi Global Storage Technologies Netherlands B.V. | Method for manufacturing a stitched “floating” trailing shield for a perpendicular recording head |
US7649711B2 (en) * | 2004-10-29 | 2010-01-19 | Hitachi Global Storage Technologies Netherlands B.V. | Double notched shield and pole structure for stray field reduction in a magnetic head |
JP4134119B2 (ja) * | 2004-12-17 | 2008-08-13 | Tdk株式会社 | 垂直磁気記録用の薄膜磁気ヘッドを備えた磁気ディスク装置及び該薄膜磁気ヘッドの製造方法 |
JP2006209927A (ja) * | 2005-01-31 | 2006-08-10 | Toshiba Corp | 垂直磁気ヘッドおよび垂直磁気ディスク装置 |
US8467147B2 (en) * | 2006-10-13 | 2013-06-18 | Headway Technologies, Inc. | Magnetic head for perpendicular magnetic recording and method of manufacturing same |
US8634162B2 (en) | 2007-03-08 | 2014-01-21 | HGST Netherlands B.V. | Perpendicular write head having a stepped flare structure and method of manufacture thereof |
-
2007
- 2007-03-08 US US11/683,972 patent/US8634162B2/en active Active
-
2008
- 2008-02-26 KR KR1020080017122A patent/KR20080082452A/ko not_active Application Discontinuation
- 2008-02-28 CN CN2008100806671A patent/CN101261839B/zh active Active
- 2008-02-29 JP JP2008050051A patent/JP5775653B2/ja not_active Expired - Fee Related
-
2009
- 2009-12-23 US US12/646,884 patent/US8230583B2/en active Active
- 2009-12-23 US US12/646,879 patent/US8797685B2/en active Active
- 2009-12-23 US US12/646,858 patent/US20100128392A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US8634162B2 (en) | 2014-01-21 |
US8230583B2 (en) | 2012-07-31 |
US20100128392A1 (en) | 2010-05-27 |
US20100091407A1 (en) | 2010-04-15 |
CN101261839B (zh) | 2012-06-27 |
US20100126001A1 (en) | 2010-05-27 |
US20080232001A1 (en) | 2008-09-25 |
US8797685B2 (en) | 2014-08-05 |
JP2008226431A (ja) | 2008-09-25 |
KR20080082452A (ko) | 2008-09-11 |
JP5775653B2 (ja) | 2015-09-09 |
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