JP5925176B2 - データ記憶装置、装置およびデータ要素 - Google Patents
データ記憶装置、装置およびデータ要素 Download PDFInfo
- Publication number
- JP5925176B2 JP5925176B2 JP2013254831A JP2013254831A JP5925176B2 JP 5925176 B2 JP5925176 B2 JP 5925176B2 JP 2013254831 A JP2013254831 A JP 2013254831A JP 2013254831 A JP2013254831 A JP 2013254831A JP 5925176 B2 JP5925176 B2 JP 5925176B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- predetermined
- side shield
- gradient
- anisotropy
- 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
Links
- 238000013500 data storage Methods 0.000 title claims description 19
- 230000005291 magnetic effect Effects 0.000 claims description 121
- 230000005294 ferromagnetic effect Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 55
- 230000005415 magnetization Effects 0.000 description 13
- 230000004907 flux Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/11—Shielding of head against electric or magnetic fields
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
- G11C11/15—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements using multiple 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
-
- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3912—Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields
-
- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3929—Disposition of magnetic thin films not used for directly coupling magnetic flux from the track to the MR film or for shielding
- G11B5/3932—Magnetic biasing films
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/161—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
- Computer Hardware Design (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
さまざまな実施例は一般的に、データ記憶装置の一部として保護される磁気要素に関する。
データ容量がより高くなるとともに、データアクセス時間がより速くなるようデータ記憶装置が進歩するにつれて、さまざまなデータコンポーネントのサイズが低減されてきた。たとえば、データビットは、データ記憶媒体のより狭いデータトラック上により稠密に詰め込まれるようになっている。このようなデータビット密度の増加により、「サイド読出(side reading)」条件において、隣接するデータトラックからのデータビットの意図しない読出しがなされることが起こり得る。横方向の磁気シールドがデータアクセス要素に導入されることでサイドシールディングを緩和し得るが、横方向のシールドが磁束を伝える際に、磁気的非対称性および磁気的不安定性を導入する場合がある。したがって、フォームファクタが低減されたデータ記憶装置において磁気シールディングを安定化する要求が継続している。
ンド層168の磁化を固定する。磁気スタック162はさらに、データビットの磁気抵抗感知を可能にする非磁性スペーサ層172によってピンド層168から分離される磁気的自由層170を有する。
Claims (18)
- 空気軸受面(ABS)上において、サイドシールドに隣接して位置決めされるとともに前記サイドシールドから分離される磁気スタックを含み、前記サイドシールドはダウントラック方向に沿って所定の非均一性の異方性勾配を有するよう構成され、所定の非均一性の異方性勾配は、前記ダウントラック方向に沿って減少する、データ記憶装置。
- 前記磁気スタックは、磁気的ピンド基準構造がない、第1および第2の磁気的自由層を含む3層読出センサとして構成される、請求項1に記載のデータ記憶装置。
- 前記所定の非均一性の異方性勾配は、前記サイドシールドに接触するシード層によって提供される、請求項1または2に記載のデータ記憶装置。
- 前記シード層は、斜め入射スパッタリングによって形成される所定のテクスチャを有する、請求項3に記載のデータ記憶装置。
- 前記シード層は、配置後処理によって形成される所定のテクスチャを有する、請求項3に記載のデータ記憶装置。
- 前記磁気スタックは、テーパ状の側壁を有しており、実質的に台形として形状決めされる、請求項1から5のいずれか1項に記載のデータ記憶装置。
- 前記サイドシールドは、クロストラック方向に沿って均一な一軸異方性を有しており、前記クロストラック方向は前記ダウントラック方向と直交する、請求項1から6のいずれか1項に記載のデータ記憶装置。
- 前記サイドシールドは、前記磁気スタックの側壁に実質的に合致するよう角度付けされた側壁を有する、請求項1から7のいずれか1項に記載のデータ記憶装置。
- 空気軸受面(ABS)上において、第1および第2のサイドシールドの間に配置されるとともに前記第1および第2のサイドシールドから分離される磁気スタックを含み、各サイドシールドはダウントラック方向に沿ってそれぞれ所定の非均一性の異方性勾配を有するよう構成され、前記所定の非均一性の異方性勾配は、前記ダウントラック方向に沿って減少する、装置。
- 前記第1のサイドシールドは、前記第2のサイドシールドの第2の所定の異方性勾配に実質的に合致する第1の所定の異方性勾配を含む、請求項9に記載の装置。
- 前記第1のサイドシールドは、前記第2のサイドシールドの第2の所定の異方性勾配と類似していない第1の所定の異方性勾配を含む、請求項9に記載の装置。
- 前記磁気スタックは、少なくとも1つの固定された磁化層と磁気的自由層とを含む、請求項9から11のいずれか1項に記載の装置。
- 前記所定の非均一性の異方性勾配は、前記磁気的自由層の近位にもっとも少ない異方性の領域を位置決めする、請求項12に記載の装置。
- 各サイドシールドについて、前記所定の非均一性の異方性勾配をシード層が提供しており、前記シード層は連続的に前記第1のサイドシールドから前記第2のサイドシールドに延在するとともに、所定のテクスチャを有するように構成される、請求項9に記載の装置。
- 空気軸受面(ABS)上において、積層されたサイドシールドに隣接して位置決めされるとともに前記積層されたサイドシールドとは分離される磁気スタックを含み、前記積層されたサイドシールドは、ダウントラック方向に沿った所定の非均一性の異方性勾配とクロストラック方向に沿った均一の一軸性の異方性とを有するよう構成され、前記所定の非均一性の異方性勾配は前記ダウントラック方向に沿って減少し、前記クロストラック方向は前記ダウントラック方向に直交する、データ要素。
- 前記積層されたサイドシールドは、各強磁性シールド層について前記所定の非均一性の異方性勾配を提供するために、第1の所定のテクスチャを有するよう構成される第1のシード層上に配置された少なくとも2つの強磁性シールド層を含む、請求項15に記載のデータ要素。
- 第2のシード層は、前記強磁性シールド層のうちの2つの間に位置決めされており、前記第2のシード層は、第1の所定の異方性とは異なる第2の所定の異方性を有するよう構成される、請求項16に記載のデータ要素。
- 前記所定の非均一性の異方性勾配は、ダウントラック方向に沿った少なくとも600エルステッドの変化を有する、請求項9に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/710,945 US8922951B2 (en) | 2012-12-11 | 2012-12-11 | Data storage device with variable anisotropy side shield |
US13/710,945 | 2012-12-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014116063A JP2014116063A (ja) | 2014-06-26 |
JP5925176B2 true JP5925176B2 (ja) | 2016-05-25 |
Family
ID=49753033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2013254831A Expired - Fee Related JP5925176B2 (ja) | 2012-12-11 | 2013-12-10 | データ記憶装置、装置およびデータ要素 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8922951B2 (ja) |
EP (1) | EP2743925A3 (ja) |
JP (1) | JP5925176B2 (ja) |
KR (1) | KR101609730B1 (ja) |
CN (1) | CN103871427B (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9153250B2 (en) * | 2013-07-31 | 2015-10-06 | Seagate Technology Llc | Magnetoresistive sensor |
US9082433B1 (en) * | 2014-06-06 | 2015-07-14 | Headway Technologies, Inc. | PMR writer with patterned shields for adjacent track erasure improvement |
US9728207B2 (en) | 2014-12-23 | 2017-08-08 | Seagate Technology Llc | Write pole magnetic guard |
US9679589B2 (en) * | 2015-09-11 | 2017-06-13 | Seagate Technology Llc | Magnetoresistive sensor with enhanced uniaxial anisotropy |
US10762919B1 (en) | 2018-01-30 | 2020-09-01 | Western Digital Technologies, Inc. | Magnetic recording write head with write pole having a tapered trailing end section with negative magnetic anisotropy |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
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US6680829B2 (en) * | 2000-09-13 | 2004-01-20 | Seagate Technology Llc | MR structures for high areal density reader by using side shields |
US7035062B1 (en) * | 2001-11-29 | 2006-04-25 | Seagate Technology Llc | Structure to achieve sensitivity and linear density in tunneling GMR heads using orthogonal magnetic alignments |
JP4270797B2 (ja) * | 2002-03-12 | 2009-06-03 | Tdk株式会社 | 磁気検出素子 |
US6818961B1 (en) * | 2003-06-30 | 2004-11-16 | Freescale Semiconductor, Inc. | Oblique deposition to induce magnetic anisotropy for MRAM cells |
US7102854B2 (en) | 2003-10-03 | 2006-09-05 | Seagate Technology Llc | Transducing head with reduced side writing |
JP2005203063A (ja) * | 2004-01-19 | 2005-07-28 | Hitachi Global Storage Technologies Netherlands Bv | 磁気ヘッド及び磁気記録再生装置 |
US7375932B2 (en) * | 2004-11-30 | 2008-05-20 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive read head for reading cross-track magnetizations |
US7379277B2 (en) | 2005-06-30 | 2008-05-27 | Seagate Technology Llc | Reader shield/electrode structure for improved stray field and electrical performance |
US7846564B2 (en) | 2005-09-27 | 2010-12-07 | Seagate Technology Llc | Perpendicular magnetic recording media with magnetic anisotropy/coercivity gradient and local exchange coupling |
US7525775B2 (en) * | 2005-11-17 | 2009-04-28 | Hitachi Global Storage Technologies Netherlands B.V. | Oblique angle etched underlayers for improved exchange biased structures in a magnetoresitive sensor |
US7446984B2 (en) * | 2005-12-14 | 2008-11-04 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic random access memory (MRAM) having increased reference layer anisotropy through ion beam etch of magnetic layers |
JP2008065926A (ja) * | 2006-09-08 | 2008-03-21 | Fujitsu Ltd | 磁気ヘッド |
US7804668B2 (en) * | 2006-11-16 | 2010-09-28 | Headway Technologies, Inc. | Enhanced hard bias in thin film magnetoresistive sensors with perpendicular easy axis growth of hard bias and strong shield-hard bias coupling |
US7869165B2 (en) * | 2007-07-30 | 2011-01-11 | Tdk Corporation | Magnetic field detecting element having stack with a plurality of free layers and side shield layers |
JP2010067304A (ja) | 2008-09-10 | 2010-03-25 | Hitachi Global Storage Technologies Netherlands Bv | 異常ホール効果を用いた磁気再生素子及び磁気ヘッド |
US8125746B2 (en) * | 2009-07-13 | 2012-02-28 | Seagate Technology Llc | Magnetic sensor with perpendicular anisotrophy free layer and side shields |
US20110007426A1 (en) | 2009-07-13 | 2011-01-13 | Seagate Technology Llc | Trapezoidal back bias and trilayer reader geometry to enhance device performance |
US8369048B2 (en) * | 2009-08-31 | 2013-02-05 | Tdk Corporation | CPP-type thin film magnetic head provided with side shields including a pair of antimagnetically exchanged-coupled side shield magnetic layers |
US8164853B2 (en) * | 2010-03-08 | 2012-04-24 | Tdk Corporation | Perpendicular magnetic write head with side shield saturation magnetic flux density increasing away from magnetic pole |
US8462467B2 (en) * | 2010-10-08 | 2013-06-11 | Tdk Corporation | Thin film magnetic head including soft layer magnetically connected with shield |
US8537501B2 (en) * | 2011-03-28 | 2013-09-17 | Seagate Technology Llc | Write head with modified side shields |
US20120250189A1 (en) * | 2011-03-29 | 2012-10-04 | Tdk Corporation | Magnetic head including side shield layers on both sides of a mr element |
US8238059B1 (en) | 2011-04-06 | 2012-08-07 | Headway Technologies, Inc. | PMR write head with narrow gap for minimal internal flux loss |
US8582249B2 (en) * | 2011-04-26 | 2013-11-12 | Seagate Technology Llc | Magnetic element with reduced shield-to-shield spacing |
US8922950B2 (en) * | 2011-05-06 | 2014-12-30 | Seagate Technology Llc | Multi-layer magnetoresistive shield with transition metal layer |
-
2012
- 2012-12-11 US US13/710,945 patent/US8922951B2/en active Active
-
2013
- 2013-12-09 EP EP20130196312 patent/EP2743925A3/en not_active Withdrawn
- 2013-12-10 JP JP2013254831A patent/JP5925176B2/ja not_active Expired - Fee Related
- 2013-12-10 CN CN201310670439.0A patent/CN103871427B/zh active Active
- 2013-12-11 KR KR1020130153932A patent/KR101609730B1/ko active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
CN103871427B (zh) | 2018-04-13 |
KR20140075628A (ko) | 2014-06-19 |
EP2743925A2 (en) | 2014-06-18 |
EP2743925A3 (en) | 2015-04-22 |
JP2014116063A (ja) | 2014-06-26 |
KR101609730B1 (ko) | 2016-04-06 |
US20140160596A1 (en) | 2014-06-12 |
US8922951B2 (en) | 2014-12-30 |
CN103871427A (zh) | 2014-06-18 |
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