JP2005012215A - 急勾配の端壁を有すバイアス磁石を備えた磁気抵抗センサ - Google Patents
急勾配の端壁を有すバイアス磁石を備えた磁気抵抗センサ Download PDFInfo
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- JP2005012215A JP2005012215A JP2004176686A JP2004176686A JP2005012215A JP 2005012215 A JP2005012215 A JP 2005012215A JP 2004176686 A JP2004176686 A JP 2004176686A JP 2004176686 A JP2004176686 A JP 2004176686A JP 2005012215 A JP2005012215 A JP 2005012215A
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- 230000005291 magnetic effect Effects 0.000 claims description 36
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- 230000005294 ferromagnetic effect Effects 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 31
- 239000010410 layer Substances 0.000 description 62
- 229920002120 photoresistant polymer Polymers 0.000 description 19
- 230000015572 biosynthetic process Effects 0.000 description 9
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 239000002344 surface layer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- G11B5/33—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- 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
-
- 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
- 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
- G11B2005/3996—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 large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] 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
- G11B5/127—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
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- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Magnetic Heads (AREA)
- Hall/Mr Elements (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
【解決手段】磁気抵抗センサ400は実質的に垂直な端壁434,436を有するバイアス磁石416a,416bを備えている。バイアス磁石416a,416bおよび自由層410間のオフセット424は、スペーサ層414a,414bの層厚415を調整することにより最適化される。ディスク・ドライブ100には、実質的に垂直な端壁434,436を持つ最適化されたバイアス磁石416a,416bを有する磁気抵抗センサ400を備えた読取素子が具備されている。
【選択図】図4g
Description
102…磁気ディスク、
104…スピンドル、
106…スライダ、
108…取り付け記録ヘッド、
110…サスペンション、
112…アクチュエータ、
114…回動点、
116…ハウジング、
118…ボイス・コイル・モータ、
120…半径円弧状経路、
200…スライダ、
202…スライダ本体、
204…読取センサ、
206…終端面、
208…上部磁極、
210…ターン、
212…電気接続パッド
214…コイル、
218…記録ヘッド、
220…磁気シールド、
222…ディスク対向部
400…磁気抵抗センサ、
402…基板、
404…サンドイッチ層、
406…センサ積層体、
410:自由層
412…フォトレジスト・パターン、
414a、414b、414c…非磁性スペーサ層、
415…層厚、
416a、416b…バイアス磁石、
418a、418b、418c…リード線、
422…分離、
424…垂直オフセット、
425…中心線、
434、436、440…端壁、
438…非磁性スペーサ材。
Claims (8)
- 強磁性固定層および強磁性自由フリー層とを含み第一と第二の端部を有するセンサ積層体と、前記センサ積層体の前記第一の端部に配置され実質的に垂直な端壁を有する第一バイアス磁石と、前記センサ積層体の前記第二の端部に配置され実質的に垂直な端壁を有す第二バイアス磁石とを有することを特徴とする磁気抵抗センサ。
- 第一と第二の端部を有する強磁性自由層を含むセンサ積層体と、前記センサ積層体の前記第一の端部に配置された層厚を有する非磁性スペーサ層と、前記強磁性自由層の前記第一の端部で前記非磁性スペーサ層を覆って配置されたバイアス磁石とを有し、前記バイアス磁石は、実質的に垂直端壁を有しかつ前記自由層に作用する大きさの安定化磁界を提供し、前記安定化磁界の大きさは予め選択された値の範囲内にあるように前記非磁性スペーサの前記層厚を調整することを特徴とする磁気抵抗センサ。
- 前記非磁性スペーサ層はクロムを含むことを特徴とする請求項2記載の磁気抵抗センサ。
- 前記安定化磁界の予め選択された値の範囲は最大可能値の少なくとも50%であることを特徴とする請求項2記載の磁気抵抗センサ。
- 前記自由層は幾何学中心を含み、前記バイアス磁石は幾何学中心を含み、前記自由層の前記幾何学中心および前記バイアス磁石の前記幾何学中心間のオフセットが約8ナノメータ未満であることを特徴とする請求項2記載の磁気抵抗センサ。
- 前記自由層および前記バイアス磁石間の隔たりが約5ナノメータ未満であることを特徴とする請求項2記載の磁気抵抗センサ。
- 磁気ディスクと、
前記磁気ディスクに情報を書き込む書込素子と、
強磁性固定層および強磁性自由層を備え第一および第二の端部を有するセンサ積層体と、前記センサ積層体の前記第一の端部に配置され実質的に垂直の端壁を有す第一バイアス磁石と、前記センサ積層体の前記第二の端部に配置され実質的に垂直の端壁を有す第二バイアス磁石とを備え、前記ディスクから情報を読み取る磁気抵抗センサと、
を有することを特徴とするディスク・ドライブ。 - 磁気ディスクと、
前記ディスクに情報を書き込む書込素子と、
第一および第二の端部を有する強磁性自由層を含むセンサ積層体と、前記センサ積層体の前記第一の端部に配置された層厚のある非磁性スペーサ層と、実質的に垂直端壁を有し前記自由層に作用する大きさの安定化磁界を提供し前記強磁性自由層の前記第一の端部に前記非磁性スペーサ層を覆って配置されたバイアス磁石とが備えられており、前記非磁性スペーサ層厚は前記安定化磁界の大きさを予め選択された値の範囲内にあるように調整されている前記ディスクから情報を読み取る磁気抵抗センサと、
を有することを特徴とするディスク・ドライブ。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/464,254 US7019950B2 (en) | 2003-06-17 | 2003-06-17 | Magnetoresistive sensor having bias magnets with steep endwalls |
Publications (2)
Publication Number | Publication Date |
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JP2005012215A true JP2005012215A (ja) | 2005-01-13 |
JP2005012215A5 JP2005012215A5 (ja) | 2007-07-26 |
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Application Number | Title | Priority Date | Filing Date |
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JP2004176686A Pending JP2005012215A (ja) | 2003-06-17 | 2004-06-15 | 急勾配の端壁を有すバイアス磁石を備えた磁気抵抗センサ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7019950B2 (ja) |
JP (1) | JP2005012215A (ja) |
KR (1) | KR20040111073A (ja) |
CN (1) | CN1573939A (ja) |
SG (1) | SG118262A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012230751A (ja) * | 2011-04-25 | 2012-11-22 | Seagate Technology Llc | 磁気抵抗センサ、装置および方法 |
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US7369374B2 (en) * | 2005-04-18 | 2008-05-06 | Hitachi Global Storage Technologies Netherlands B.V. | Current in plane magnetoresistive sensor having a contiguous hard bias layer located at back edge of stripe height |
US7467459B2 (en) * | 2005-04-18 | 2008-12-23 | Hitachi Global Storage Technologies Netherlands B.V. | Method for manufacturing a current in plane magnetoresistive sensor having a contiguous hard bias layer located at back edge of stripe height |
US8575920B2 (en) | 2007-12-05 | 2013-11-05 | Infineon Technologies Ag | Magneto-resistive magnetic field sensor |
US8922205B2 (en) * | 2011-10-31 | 2014-12-30 | Everspin Technologies, Inc. | Apparatus and method for reset and stabilization control of a magnetic sensor |
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- 2003-06-17 US US10/464,254 patent/US7019950B2/en not_active Expired - Lifetime
-
2004
- 2004-06-09 SG SG200403552A patent/SG118262A1/en unknown
- 2004-06-15 JP JP2004176686A patent/JP2005012215A/ja active Pending
- 2004-06-16 KR KR1020040044332A patent/KR20040111073A/ko not_active Application Discontinuation
- 2004-06-16 CN CNA2004100495068A patent/CN1573939A/zh active Pending
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JP2002305336A (ja) * | 2001-04-09 | 2002-10-18 | Alps Electric Co Ltd | スピンバルブ型薄膜素子およびその製造方法 |
JP2002367117A (ja) * | 2001-06-04 | 2002-12-20 | Read Rite Corp | 変換器、及び変換器の製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012230751A (ja) * | 2011-04-25 | 2012-11-22 | Seagate Technology Llc | 磁気抵抗センサ、装置および方法 |
Also Published As
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SG118262A1 (en) | 2006-01-27 |
US7019950B2 (en) | 2006-03-28 |
CN1573939A (zh) | 2005-02-02 |
KR20040111073A (ko) | 2004-12-31 |
US20040257716A1 (en) | 2004-12-23 |
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