JP4160947B2 - 磁気ヘッド、および磁気記録装置 - Google Patents
磁気ヘッド、および磁気記録装置 Download PDFInfo
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- JP4160947B2 JP4160947B2 JP2004325489A JP2004325489A JP4160947B2 JP 4160947 B2 JP4160947 B2 JP 4160947B2 JP 2004325489 A JP2004325489 A JP 2004325489A JP 2004325489 A JP2004325489 A JP 2004325489A JP 4160947 B2 JP4160947 B2 JP 4160947B2
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- recording
- magnetic field
- magnetic
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- pole
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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
-
- 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
-
- 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
-
- 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
-
- 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/743—Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks
-
- 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Heads (AREA)
Description
"One Terabit per Square Inch Perpendicular Recording Conceptual Design", M. Mallary, A. Torabi, and M. Benakli, IEEE Trans. Magn., Vol. 38, 1719, 2002
図1には、この発明の実施の形態に係る磁気記録装置の要部の構造を概略的に示してある。
実際には、主磁極1の先端面11と2層膜媒体6との間のギャップMSがあるため、記録幅MWWは主磁極幅TWWより僅かに大きくなる。このため、厳密に言うと、上式は、下式のように書きかえられる。
次に、上述したサイドシールド2の位置を踏まえて、最適な主磁極幅TWWについて考察する。2層膜媒体6の記録層16に記録されるビットの記録幅MWWは、主磁極幅TWWが大きいほど大きくなる。また、主磁極幅TWWが大きくなると隣接トラック17aの幅も当然大きくなる。つまり、トラックピッチTPと主磁極幅TWWと主磁極〜サイドシールド間距離PSSとが上述した関係を満たす場合、主磁極幅TWWを大きくするとサイドシールド2を主磁極1に近づけなければならない。
Claims (3)
- 軟磁性裏打ち層に重ねて記録層を有する2層膜媒体と、
上記記録層の記録トラックに対向する先端を有する主磁極、および上記記録トラックの幅方向に沿って上記先端から離間して設けられたサイドシールドを有する単磁極ヘッドと、を有し、
上記先端とサイドシールドの距離が上記記録トラックのピッチと先端の幅との差に等しく、
上記軟磁性裏打ち層が上記先端の幅より狭い幅のランドを有するランド・アンド・グルーブ構造を有することを特徴とする磁気記録装置。 - 軟磁性裏打ち層に重ねて記録層を有する2層膜媒体と、
上記記録層の記録トラックに対向する先端を有する主磁極、および上記記録トラックの幅方向に沿って上記先端から離間して設けられたサイドシールドを有する単磁極ヘッドと、を有し、
上記サイドシールドの上記先端に対向するエッジは、上記先端が対向する記録トラックに隣接する隣接トラックのエッジと一致する位置に設けられており、
上記軟磁性裏打ち層が上記先端の幅より狭い幅のランドを有するランド・アンド・グルーブ構造を有することを特徴とする磁気記録装置。 - 上記主磁極の幅が上記記録トラックのピッチの40[%]〜60[%]であることを特徴とする請求項1または請求項2に記載の磁気記録装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004325489A JP4160947B2 (ja) | 2004-11-09 | 2004-11-09 | 磁気ヘッド、および磁気記録装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004325489A JP4160947B2 (ja) | 2004-11-09 | 2004-11-09 | 磁気ヘッド、および磁気記録装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006134540A JP2006134540A (ja) | 2006-05-25 |
JP4160947B2 true JP4160947B2 (ja) | 2008-10-08 |
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JP2004325489A Expired - Fee Related JP4160947B2 (ja) | 2004-11-09 | 2004-11-09 | 磁気ヘッド、および磁気記録装置 |
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JP (1) | JP4160947B2 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008152850A (ja) * | 2006-12-15 | 2008-07-03 | Tdk Corp | 磁気ヘッド及び磁気記録再生装置 |
JP5113388B2 (ja) * | 2007-01-09 | 2013-01-09 | エイチジーエスティーネザーランドビーブイ | 磁気ディスク装置 |
JP2008176858A (ja) | 2007-01-18 | 2008-07-31 | Hitachi Global Storage Technologies Netherlands Bv | 垂直磁気記録媒体、及びそれを用いたハードディスクドライブ |
JP2008282449A (ja) | 2007-05-08 | 2008-11-20 | Tdk Corp | 垂直磁気記録ヘッド |
US9495996B2 (en) | 2007-06-29 | 2016-11-15 | Seagate Technology, Llc | Writer with increased write field |
US8339735B2 (en) * | 2007-06-29 | 2012-12-25 | Seagate Technology Llc | Magnetic writer for patterned stack with increased write field |
JP4358279B2 (ja) | 2007-08-22 | 2009-11-04 | 株式会社東芝 | 磁気記録ヘッド及び磁気記録装置 |
US8994587B2 (en) | 2010-05-14 | 2015-03-31 | Qualcomm Incorporated | Compressed sensing for navigation data |
JP2009080875A (ja) | 2007-09-25 | 2009-04-16 | Toshiba Corp | 磁気ヘッド及び磁気記録装置 |
JP5361259B2 (ja) | 2008-06-19 | 2013-12-04 | 株式会社東芝 | スピントルク発振子、磁気記録ヘッド、磁気ヘッドアセンブリ及び磁気記録装置 |
JP5377893B2 (ja) | 2008-06-19 | 2013-12-25 | 株式会社東芝 | 磁気ヘッドアセンブリおよび磁気記録再生装置 |
JP2010040126A (ja) * | 2008-08-06 | 2010-02-18 | Toshiba Corp | 磁気記録ヘッド、磁気ヘッドアセンブリ及び磁気記録装置 |
JP5558698B2 (ja) | 2008-11-28 | 2014-07-23 | 株式会社東芝 | 磁気記録ヘッド、磁気ヘッドアセンブリ、磁気記録装置及び磁気記録方法 |
JP5606482B2 (ja) | 2012-03-26 | 2014-10-15 | 株式会社東芝 | 磁気ヘッド、磁気ヘッドアセンブリ、磁気記録再生装置及び磁気ヘッドの製造方法 |
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2004
- 2004-11-09 JP JP2004325489A patent/JP4160947B2/ja not_active Expired - Fee Related
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JP2006134540A (ja) | 2006-05-25 |
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