JP2007250170A5 - - Google Patents
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- JP2007250170A5 JP2007250170A5 JP2007063507A JP2007063507A JP2007250170A5 JP 2007250170 A5 JP2007250170 A5 JP 2007250170A5 JP 2007063507 A JP2007063507 A JP 2007063507A JP 2007063507 A JP2007063507 A JP 2007063507A JP 2007250170 A5 JP2007250170 A5 JP 2007250170A5
- Authority
- JP
- Japan
- Prior art keywords
- disk
- head
- amplitude
- hdc
- testing machine
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims 1
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/376,660 US7292401B2 (en) | 2006-03-14 | 2006-03-14 | System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007250170A JP2007250170A (ja) | 2007-09-27 |
| JP2007250170A5 true JP2007250170A5 (enExample) | 2010-03-25 |
Family
ID=38517519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007063507A Pending JP2007250170A (ja) | 2006-03-14 | 2007-03-13 | 磁気抵抗信号振幅によって磁気記録ディスクドライブ内のヘッド・ディスク間接触を決定するシステムおよび方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7292401B2 (enExample) |
| JP (1) | JP2007250170A (enExample) |
| CN (1) | CN101038769A (enExample) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4255869B2 (ja) * | 2004-03-24 | 2009-04-15 | 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 | 磁気ディスク装置およびそれに用いる磁気ヘッドスライダ |
| JP2007066460A (ja) * | 2005-09-01 | 2007-03-15 | Hitachi Global Storage Technologies Netherlands Bv | 磁気ヘッド評価装置及びそれを用いた磁気ディスク装置の製造方法 |
| US7558015B2 (en) * | 2006-03-29 | 2009-07-07 | Maxtor Corporation | Actuation efficiency based contact detection |
| US7423830B2 (en) * | 2006-04-10 | 2008-09-09 | Iomega Corporation | Detecting head/disk contact in a disk drive using a calibration parameter |
| JP2007293948A (ja) * | 2006-04-21 | 2007-11-08 | Fujitsu Ltd | 情報記録再生装置、ヘッド浮上量制御方法、ヘッド浮上制御回路 |
| US7508616B2 (en) * | 2006-05-18 | 2009-03-24 | Seagate Technology Llc | Regulating data writes responsive to head fly height |
| US20070291401A1 (en) * | 2006-05-19 | 2007-12-20 | Maxtor Corporation | Contact detection using calibrated seeks |
| JP2008047241A (ja) * | 2006-08-18 | 2008-02-28 | Tdk Corp | 浮上量測定方法及び浮上量の調整が可能な磁気ディスク装置 |
| US20080055772A1 (en) * | 2006-09-01 | 2008-03-06 | Mcmillan Chris | Method and apparatus for predicting contact of a read-write head in a hard disk drive |
| US20080088962A1 (en) * | 2006-10-17 | 2008-04-17 | Samsung Electronics Co., Ltd. | Detection of HDI in disk drives using read back signal |
| US20080291564A1 (en) * | 2007-05-25 | 2008-11-27 | Samsung Electronics Co., Ltd. | Detecting head-disk contact during off-track operations |
| JP2008293625A (ja) * | 2007-05-28 | 2008-12-04 | Hitachi Global Storage Technologies Netherlands Bv | ヘッドとディスクとの間のクリアランスを制御する制御値を決定する装置、その方法及び磁気ディスク・ドライブ装置 |
| JP2009032325A (ja) * | 2007-07-26 | 2009-02-12 | Fujitsu Ltd | 記憶装置、制御方法及び制御ユニット |
| US7583466B2 (en) * | 2007-11-15 | 2009-09-01 | Western Digital (Fremont), Llc | Disk drive determining operating fly height by detecting head disk contact from disk rotation time |
| US7724461B1 (en) * | 2007-12-21 | 2010-05-25 | Western Digital Technologies, Inc. | Determining head non-linearity in a disk drive |
| US7933085B2 (en) * | 2008-03-31 | 2011-04-26 | Hitachi Global Storage Technologies Netherlands, B.V. | Head spacing verification in magnetic disk drive systems during end-user operation |
| US7920346B2 (en) * | 2008-05-21 | 2011-04-05 | Sae Magnetics (H.K.) Ltd. | Method for testing performance of a magnetic head slider |
| US7965459B2 (en) * | 2008-12-18 | 2011-06-21 | Seagate Technology Llc | Wavelets-based detection of proximity between a sensor and an object |
| US20100157765A1 (en) * | 2008-12-19 | 2010-06-24 | Seagate Technology Llc | Collection of readback signal modulation data |
| US7719786B1 (en) * | 2008-12-23 | 2010-05-18 | Hitachi Global Storage Technologies Netherlands B.V. | Active fly height control using radio frequency feedback |
| US7830634B2 (en) * | 2008-12-23 | 2010-11-09 | Hitachi Global Storage Technologies Netherlands, B.V. | Head-disk contact detection and work function difference determination |
| US7889447B2 (en) * | 2009-01-14 | 2011-02-15 | Seagate Technology Llc | Readback signal-based head-disc contact detection using AM/FM demodulation |
| JP5610507B2 (ja) * | 2009-09-17 | 2014-10-22 | エイチジーエスティーネザーランドビーブイ | ヘッドスライダ及び磁気ディスク装置 |
| US8665546B1 (en) | 2010-01-07 | 2014-03-04 | Western Digital Technologies, Inc. | Adaptive threshold for detecting touchdown or contamination |
| KR20110108180A (ko) * | 2010-03-26 | 2011-10-05 | 삼성전자주식회사 | 헤드의 터치-다운 검출 방법 및 이를 이용한 헤드 부상 높이 조정 방법 및 디스크 드라이브 |
| KR101592195B1 (ko) * | 2010-03-26 | 2016-02-05 | 시게이트 테크놀로지 인터내셔날 | 센서를 이용한 터치-다운 및 헤드/미디어 접촉 검출 방법 및 장치와 이를 적용한 디스크 드라이브 및 저장매체 |
| US8730611B2 (en) * | 2011-02-28 | 2014-05-20 | Seagate Technology Llc | Contact detection |
| CN102280112B (zh) * | 2011-04-13 | 2013-12-18 | 华中科技大学 | 一种用于硬盘驱动器的热飞高控制滑块 |
| US9053740B1 (en) | 2011-05-04 | 2015-06-09 | Western Digital Technologies, Inc. | Disk drive determining touchdown threshold |
| US8643981B2 (en) * | 2011-12-28 | 2014-02-04 | HGST Netherlands B. V. | Magnetic domain control for an embedded contact sensor for a magnetic recording head |
| US8611036B2 (en) * | 2012-05-06 | 2013-12-17 | HGST Netherlands B.V. | Disk drive with head thermal fly-height actuator and controller for compensation of write head expansion |
| US8797671B2 (en) | 2012-05-17 | 2014-08-05 | HGST Netherlands B.V. | Excitation of airbearing oscillation with tar nearfield device for touchdown detection |
| US8582231B1 (en) | 2012-06-06 | 2013-11-12 | Western Digital Technologies, Inc. | Disk drive determining head touchdown threshold based on curve fitting prediction error |
| US20140063644A1 (en) * | 2012-08-29 | 2014-03-06 | Seagate Technology Llc | Magnetic Element with Multiple Selective Transducing Elements |
| US8891193B1 (en) | 2013-05-09 | 2014-11-18 | Western Digital Technologies, Inc. | Disk drive calibrating threshold and gain of touchdown sensor |
| US9214186B1 (en) | 2015-03-23 | 2015-12-15 | Western Digital Technologies, Inc. | Data storage device measuring radial offset between read element and write element |
| US9373346B1 (en) | 2015-06-27 | 2016-06-21 | International Business Machines Corporation | Adjustable spacing formatter head |
| JP7293105B2 (ja) * | 2019-12-24 | 2023-06-19 | 株式会社東芝 | 磁気ディスク装置 |
| US11315592B1 (en) | 2021-02-10 | 2022-04-26 | Seagate Technology Llc | Adjusting HGA z-height via HSA elevator using head/actuator feedback |
| US11875830B2 (en) | 2021-02-10 | 2024-01-16 | Seagate Technology Llc | Adjusting HGA z-height via HSA elevator using head/actuator feedback |
| US11900965B2 (en) | 2022-02-14 | 2024-02-13 | Seagate Technology Llc | Z-height control for disc drive using servo wedge timing |
| JP2023141742A (ja) | 2022-03-24 | 2023-10-05 | 株式会社東芝 | 磁気ディスク装置及び磁気ディスク装置の制御方法 |
Family Cites Families (50)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5021906A (en) | 1989-10-31 | 1991-06-04 | International Business Machines Corporation | Programmable air bearing slider including magnetic read/write element |
| US5130866A (en) | 1990-07-17 | 1992-07-14 | International Business Machines Corporation | Method and circuitry for in-situ measurement of transducer/recording medium clearance and transducer magnetic instability |
| JP2884774B2 (ja) | 1990-12-01 | 1999-04-19 | 株式会社日立製作所 | 情報記憶装置及びその製法 |
| US5455730A (en) | 1993-02-18 | 1995-10-03 | International Business Machines Corporation | Contact magnetic recording disk file with a magnetoresistive read sensor |
| US6088176A (en) * | 1993-04-30 | 2000-07-11 | International Business Machines Corporation | Method and apparatus for separating magnetic and thermal components from an MR read signal |
| JPH0944979A (ja) * | 1995-07-31 | 1997-02-14 | Toshiba Corp | ディスク記録再生装置及びディスク記録再生装置に適用するヘッド衝突検出装置 |
| US5777815A (en) * | 1996-06-13 | 1998-07-07 | International Business Machines Corporation | Disk drive with shock detection based on thermoresistive signal from magnetoresistive head |
| JPH10188248A (ja) * | 1996-09-19 | 1998-07-21 | Hitachi Ltd | サーボ信号処理回路及びそれを用いた磁気ディスク装置 |
| US5909330A (en) | 1996-12-12 | 1999-06-01 | Maxtor Corporation | Method and apparatus for detecting head flying height in a disk drive |
| US5991113A (en) | 1997-04-07 | 1999-11-23 | Seagate Technology, Inc. | Slider with temperature responsive transducer positioning |
| US6735027B2 (en) | 1998-06-02 | 2004-05-11 | Texas Instruments Incorporated | Head fly height by using the applied peak area ratio to determine signal PW50 |
| US6275345B1 (en) | 1998-12-02 | 2001-08-14 | International Business Machines Corporation | System and method for estimating a frequency of slider airbearing resonance |
| US6570730B1 (en) * | 1999-06-09 | 2003-05-27 | Seagate Technology, Llc. | Shear-based transducer for HDD read/write element height control |
| US6344949B1 (en) | 1999-07-13 | 2002-02-05 | International Business Machines Corporation | Flying height adjustment for air bearing sliders |
| US6452735B1 (en) * | 1999-07-19 | 2002-09-17 | Maxtor Corporation | Disk drive that monitors the flying height of a dual element transducer using a thermally induced signal during write operations |
| US6417981B1 (en) * | 1999-09-23 | 2002-07-09 | International Business Machines Corporation | System and method for measuring absolute transducer-medium clearance using a thermal response of an MR transducer |
| US6501606B2 (en) * | 1999-12-02 | 2002-12-31 | Seagate Technology Llc | Fly height control for a read/write head over patterned media |
| JP3647708B2 (ja) | 2000-02-09 | 2005-05-18 | 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 | 磁気ヘッド浮上量異常検出方法、データ書込方法およびハード・ディスク・ドライブ装置 |
| US6600622B1 (en) * | 2000-02-11 | 2003-07-29 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for detecting displacement of disk drive heads on micro actuators due to contact with disks |
| US6407874B1 (en) | 2000-03-30 | 2002-06-18 | International Business Machines Corporation | Method and apparatus for detection slider airbearing resonance using SAT P-list data |
| US6479988B2 (en) * | 2000-06-06 | 2002-11-12 | Tdk Corporation | Method and apparatus for testing thin-film magnetic head |
| US6611399B1 (en) | 2000-12-07 | 2003-08-26 | Seagate Technology Llc | Micro-actuated micro-suspension(MAMS) slider for both fly height and tracking position |
| US6717776B2 (en) | 2001-01-19 | 2004-04-06 | Seagate Technology Llc | Adjustable fly height control using an adjustable head actuator assembly |
| US6785079B2 (en) | 2001-03-16 | 2004-08-31 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for estimating the flyheight of an airbearing slider in a storage device |
| US6775103B2 (en) | 2001-04-02 | 2004-08-10 | Hitachi Global Storage Technologies Netherlands B.V. | Slider head having thermally controlled distal end and assembly with a rotating disc |
| WO2002095738A1 (en) | 2001-05-22 | 2002-11-28 | Seagate Technology Llc | Method and system for measuring fly height |
| US6801376B2 (en) * | 2001-06-21 | 2004-10-05 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for evaluating a head-disk interface condition for disk drives |
| US6898034B2 (en) | 2001-10-10 | 2005-05-24 | Seagate Technology Llc | Fly height measurement for a disc drive |
| US6765745B2 (en) | 2001-12-28 | 2004-07-20 | Hitachi Global Storage Technologies Netherlands, B.V. | Method and apparatus for in situ detection of high-flying sliders over customer data |
| US7486457B2 (en) * | 2002-02-15 | 2009-02-03 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for predicting write failure resulting from flying height modulation |
| KR100468766B1 (ko) | 2002-09-19 | 2005-01-29 | 삼성전자주식회사 | 헤드와 디스크간의 플라잉 높이를 제어하기 위한 방법 및그 제어장치 |
| JP3626954B2 (ja) | 2003-03-12 | 2005-03-09 | Tdk株式会社 | 薄膜磁気ヘッドの製造方法、薄膜磁気ヘッド、ヘッドジンバルアセンブリ及びハードディスク装置 |
| JP2004335069A (ja) | 2003-04-14 | 2004-11-25 | Tdk Corp | 薄膜磁気ヘッド、ヘッドジンバルアセンブリ、及び、ハードディスク装置 |
| US6940691B2 (en) | 2003-04-30 | 2005-09-06 | Hitachi Global Storage Technologies Netherlands B.V. | Electrically resistive heating device for data storage systems |
| US7133254B2 (en) | 2003-05-30 | 2006-11-07 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic recording head with heating device |
| US7038875B2 (en) | 2003-07-31 | 2006-05-02 | Seagate Technology Llc | Dynamic measurement of head media spacing modulation |
| JP4072469B2 (ja) | 2003-08-01 | 2008-04-09 | 株式会社日立グローバルストレージテクノロジーズ | 磁気ヘッドスライダおよび磁気ディスク装置 |
| JP4223897B2 (ja) | 2003-08-28 | 2009-02-12 | 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 | サーマルプロトリューション量を浮上量管理に用いる機能を持つ磁気ディスク装置、その機能を有す検査装置。 |
| US6947246B2 (en) | 2003-08-29 | 2005-09-20 | Hitachi Global Storage Technologies Netherlands, B.V. | Large protrusion recording head for controlled magnetic spacing recording/reading |
| US7016131B2 (en) | 2003-08-29 | 2006-03-21 | Agency For Science, Technology And Research | Method and implementation of in-situ absolute head medium spacing measurement |
| US7054084B2 (en) | 2003-08-29 | 2006-05-30 | Hitachi Global Storage Technologies Netherlands B.V. | Method, apparatus and program storage device for sensing increased resistance changes in an MR element to detect MR sensor events |
| US6972919B2 (en) | 2003-09-05 | 2005-12-06 | Hitachi Global Storage Technologies Netherlands, B.V. | Increasing head-disk interface reliability using controlled heating |
| US6975472B2 (en) | 2003-09-12 | 2005-12-13 | Seagate Technology Llc | Head with heating element and control regime therefor |
| US20050094303A1 (en) | 2003-11-04 | 2005-05-05 | Tom Chan | Flying height monitor with servo AGC voltage for write operation in a hard disk drive |
| JP4131950B2 (ja) | 2003-11-04 | 2008-08-13 | 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 | 回転円板形記憶装置 |
| US8531796B2 (en) * | 2004-01-09 | 2013-09-10 | International Business Machines Corporation | Fly height extraction system |
| US7119979B2 (en) * | 2004-06-30 | 2006-10-10 | Hitachi Global Storage Technologies Netherlands B.V. | Measurement of slider clearance by inducing collision of the slider with disk surface |
| JP2006252593A (ja) * | 2005-03-08 | 2006-09-21 | Hitachi Global Storage Technologies Netherlands Bv | 磁気ディスク装置、制御方法及び製造方法 |
| US7215495B1 (en) * | 2005-12-27 | 2007-05-08 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for determining head-disk contact in a magnetic recording disk drive |
| US7180692B1 (en) * | 2005-12-27 | 2007-02-20 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for calibrating and controlling a fly-height actuator in a magnetic recording disk drive |
-
2006
- 2006-03-14 US US11/376,660 patent/US7292401B2/en not_active Expired - Fee Related
-
2007
- 2007-03-13 JP JP2007063507A patent/JP2007250170A/ja active Pending
- 2007-03-14 CN CN200710085774.9A patent/CN101038769A/zh active Pending
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