DE69032626T2 - Verfahren zum magnetischen Aufzeichnen und Wiedergeben von Daten, magnetischer Auzeichnungsträger, sein Herstellungsverfahren und Gerät zur magnetischen Aufzeichnung - Google Patents
Verfahren zum magnetischen Aufzeichnen und Wiedergeben von Daten, magnetischer Auzeichnungsträger, sein Herstellungsverfahren und Gerät zur magnetischen AufzeichnungInfo
- Publication number
- DE69032626T2 DE69032626T2 DE69032626T DE69032626T DE69032626T2 DE 69032626 T2 DE69032626 T2 DE 69032626T2 DE 69032626 T DE69032626 T DE 69032626T DE 69032626 T DE69032626 T DE 69032626T DE 69032626 T2 DE69032626 T2 DE 69032626T2
- Authority
- DE
- Germany
- Prior art keywords
- magnetic
- pits
- magnetic recording
- recording medium
- magnetically
- 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
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/065—Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B20/1252—Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
-
- 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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
-
- 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
-
- 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
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/855—Coating only part of a support with a magnetic layer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1259—Formatting, e.g. arrangement of data block or words on the record carriers on discs with ROM/RAM areas
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/211—Discs having both read-only and rewritable or recordable areas containing application data; Partial ROM media
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Multimedia (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP273689 | 1989-01-11 | ||
JP1763389 | 1989-01-30 | ||
JP3103489 | 1989-02-13 | ||
JP3822089A JPH02218016A (ja) | 1989-02-20 | 1989-02-20 | 磁気記録媒体および磁気記録装置 |
JP6096789 | 1989-03-15 | ||
JP10162389 | 1989-04-24 | ||
JP15457089 | 1989-06-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69032626D1 DE69032626D1 (de) | 1998-10-08 |
DE69032626T2 true DE69032626T2 (de) | 1999-05-20 |
Family
ID=27563196
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69021741T Expired - Fee Related DE69021741T2 (de) | 1989-01-11 | 1990-01-11 | Magnetischer Aufzeichnungsträger und Verfahren zum magnetischen Aufzeichnen und Wiedergeben von Daten. |
DE69032626T Expired - Fee Related DE69032626T2 (de) | 1989-01-11 | 1990-01-11 | Verfahren zum magnetischen Aufzeichnen und Wiedergeben von Daten, magnetischer Auzeichnungsträger, sein Herstellungsverfahren und Gerät zur magnetischen Aufzeichnung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69021741T Expired - Fee Related DE69021741T2 (de) | 1989-01-11 | 1990-01-11 | Magnetischer Aufzeichnungsträger und Verfahren zum magnetischen Aufzeichnen und Wiedergeben von Daten. |
Country Status (3)
Country | Link |
---|---|
US (1) | US5296995A (de) |
EP (2) | EP0378222B1 (de) |
DE (2) | DE69021741T2 (de) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5568331A (en) * | 1989-10-27 | 1996-10-22 | Hitachi, Ltd. | Method of head positioning and magnetic recording disk drive using the same |
US5768075A (en) * | 1991-12-17 | 1998-06-16 | Baradun R&D Ltd. | Disk medium w/magnetically filled features aligned in rows and columns |
JP3254743B2 (ja) * | 1992-08-17 | 2002-02-12 | ソニー株式会社 | 位置決め信号の書き込み方法 |
JPH06111502A (ja) * | 1992-09-30 | 1994-04-22 | Sony Corp | 磁気ディスク装置 |
JP3344495B2 (ja) * | 1993-03-04 | 2002-11-11 | ソニー株式会社 | 磁気ディスク装置 |
US5430594A (en) * | 1993-05-10 | 1995-07-04 | Hitachi Maxell, Ltd. | Magnetic recording medium |
US5583712A (en) * | 1993-06-24 | 1996-12-10 | Maxtor Corporation | Magnetic recording system having spiral tracks |
US5993937A (en) * | 1993-11-30 | 1999-11-30 | Matsushita Electric Industrial Co., Ltd. | Magneto-optic recording medium and method of fabricating the same |
US5585989A (en) * | 1993-11-30 | 1996-12-17 | Sony Corporation | Magnetic disc substrate and a magnetic disc using the same |
US5537282A (en) * | 1994-07-15 | 1996-07-16 | Treves; David | Data storage disk having improved tracking capability |
US6146740A (en) * | 1994-11-28 | 2000-11-14 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording medium and method of fabricating the same |
JPH08185676A (ja) * | 1994-12-28 | 1996-07-16 | Sony Corp | 磁気デイスク及びデイスク装置 |
US5576532A (en) * | 1995-01-03 | 1996-11-19 | Xerox Corporation | Interleaved and interlaced sync codes and address codes for self-clocking glyph codes |
JPH08249602A (ja) * | 1995-03-06 | 1996-09-27 | Mitsubishi Electric Corp | 磁気式記憶再生方法ならびにそれに用いる磁気再生装置、磁気記憶媒体およびその製法 |
JPH08300858A (ja) | 1995-05-08 | 1996-11-19 | Dainippon Printing Co Ltd | 情報記録媒体 |
JPH09167308A (ja) * | 1995-12-19 | 1997-06-24 | Canon Electron Inc | 磁気再生方法、磁気検出素子、磁気検出装置、及び磁気記録媒体 |
US6104579A (en) * | 1996-04-11 | 2000-08-15 | Sony Corporation | Magnetic disk head having data zone and control signal zones which generate different lifts when flown over by a head slider |
CN1198239A (zh) * | 1996-06-26 | 1998-11-04 | 索尼株式会社 | 磁盘装置、磁盘与磁盘盒 |
TW342495B (en) * | 1996-07-22 | 1998-10-11 | Matsushita Electric Ind Co Ltd | Master information carrier, method of producing the same, and method for recording master information signal on magnetic recording medium |
JP3384728B2 (ja) * | 1997-11-12 | 2003-03-10 | 松下電器産業株式会社 | 磁気記録再生装置の製造方法及び磁気記録再生装置 |
JP3329259B2 (ja) | 1998-03-20 | 2002-09-30 | 松下電器産業株式会社 | マスター情報担体、および、磁気記録媒体の製造方法 |
JP3361740B2 (ja) | 1998-03-23 | 2003-01-07 | 松下電器産業株式会社 | マスター情報磁気記録装置及び磁気記録媒体の製造方法 |
JP3639943B2 (ja) * | 1998-04-22 | 2005-04-20 | 富士通株式会社 | 磁気記録媒体及び磁気ヘッド装置 |
US6549360B1 (en) * | 1998-05-19 | 2003-04-15 | Seagate Technology Llc | Magnetic recording medium with laser-formed servo-marks |
WO2000026904A1 (fr) | 1998-10-29 | 2000-05-11 | Matsushita Electric Industrial Co., Ltd. | Support d'information pilote et procede d'enregistrement d'information pilote |
DE10084256T1 (de) | 1999-02-22 | 2002-01-31 | Seagate Technology Llc | Vergrabene Servo-bemusterte Medien |
GB2371918B (en) * | 1999-11-12 | 2003-11-26 | Seagate Technology Llc | Magnetic media patterning utilizing heat-induced phase transition |
US6781785B2 (en) * | 1999-11-29 | 2004-08-24 | Jpmorgan Chase Bank | Method and system for utilizing circular marks in position error signal patterns |
WO2001043122A2 (en) * | 1999-12-10 | 2001-06-14 | Seagate Technology Llc | Magnetic disc having physical servo patterns with a magnetic carrier, and method of making and using the same |
WO2001065547A1 (fr) * | 2000-03-01 | 2001-09-07 | Hitachi, Ltd. | Procede et dispositif d'enregistrement/lecture d'informations et support d'enregistrement d'informations |
JP3767470B2 (ja) * | 2001-11-30 | 2006-04-19 | ブラザー工業株式会社 | インクジェットヘッド及びその製造方法 |
JP2006228348A (ja) * | 2005-02-18 | 2006-08-31 | Sony Corp | 情報書込装置及び方法、磁気ディスク製造装置及び方法、磁気ディスク |
US7333289B2 (en) * | 2005-03-22 | 2008-02-19 | Tdk Corporation | Magnetic recording and reproducing apparatus, method of controlling the same, magnetic recording medium, and stamper for manufacturing magnetic recording medium |
JP2008027524A (ja) * | 2006-07-21 | 2008-02-07 | Hitachi Global Storage Technologies Netherlands Bv | 磁気ディスク上にパターンを書き込む方法及びその装置 |
US7612961B2 (en) * | 2007-10-12 | 2009-11-03 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic recording disk and disk drive with patterned phase-type servo fields for read/write head positioning |
US20090199768A1 (en) * | 2008-02-12 | 2009-08-13 | Steven Verhaverbeke | Magnetic domain patterning using plasma ion implantation |
US20090201722A1 (en) * | 2008-02-12 | 2009-08-13 | Kamesh Giridhar | Method including magnetic domain patterning using plasma ion implantation for mram fabrication |
US8535766B2 (en) | 2008-10-22 | 2013-09-17 | Applied Materials, Inc. | Patterning of magnetic thin film using energized ions |
US8551578B2 (en) * | 2008-02-12 | 2013-10-08 | Applied Materials, Inc. | Patterning of magnetic thin film using energized ions and thermal excitation |
US9111565B2 (en) * | 2009-01-16 | 2015-08-18 | Seagate Technology Llc | Data storage device with both bit patterned and continuous media |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3034111A (en) * | 1958-11-24 | 1962-05-08 | Ibm | Data storage system |
US3593331A (en) * | 1969-01-31 | 1971-07-13 | Ncr Co | Magnetic disc calibration track with diminishing apertures |
US3753252A (en) * | 1971-06-28 | 1973-08-14 | Ibm | Disk pack assembly and method of making |
US4188646A (en) * | 1978-05-30 | 1980-02-12 | Sperry Rand Corporation | Sectorized data path following servo system |
JPS58111130A (ja) * | 1981-12-24 | 1983-07-02 | Omron Tateisi Electronics Co | 磁気記録媒体 |
US4746580A (en) * | 1983-03-31 | 1988-05-24 | International Business Machines Corporation | Read-only magnetic recording media |
DE3379998D1 (en) * | 1983-03-31 | 1989-07-06 | Ibm | Read-only magnetic recording media and process of making the same |
JPS62139179A (ja) * | 1985-12-11 | 1987-06-22 | Csk Corp | 同期制御方式 |
JPS6410463A (en) * | 1987-07-01 | 1989-01-13 | Sony Corp | Magnetic disk |
US4912487A (en) * | 1988-03-25 | 1990-03-27 | Texas Instruments Incorporated | Laser scanner using focusing acousto-optic device |
US4935278A (en) * | 1988-04-28 | 1990-06-19 | International Business Machines Corporation | Thin film magnetic recording disk and fabrication process |
US4912585A (en) * | 1988-04-28 | 1990-03-27 | International Business Machines Corporation | Discrete track thin film magnetic recording disk with embedded servo information |
US4961123A (en) * | 1988-06-03 | 1990-10-02 | Insite Peripherals | Magnetic information media storage with optical servo tracks |
US4935835A (en) * | 1988-11-10 | 1990-06-19 | Insite Peripherals, Inc. | Magnetic media containing reference feature and methods for referencing magnetic head position to the reference feature |
-
1990
- 1990-01-11 EP EP90100547A patent/EP0378222B1/de not_active Expired - Lifetime
- 1990-01-11 DE DE69021741T patent/DE69021741T2/de not_active Expired - Fee Related
- 1990-01-11 DE DE69032626T patent/DE69032626T2/de not_active Expired - Fee Related
- 1990-01-11 EP EP95101862A patent/EP0657884B1/de not_active Expired - Lifetime
-
1993
- 1993-01-04 US US08/000,549 patent/US5296995A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69032626D1 (de) | 1998-10-08 |
DE69021741T2 (de) | 1996-04-18 |
EP0378222B1 (de) | 1995-08-23 |
EP0657884B1 (de) | 1998-09-02 |
EP0657884A1 (de) | 1995-06-14 |
DE69021741D1 (de) | 1995-09-28 |
US5296995A (en) | 1994-03-22 |
EP0378222A1 (de) | 1990-07-18 |
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