JPS61210565A - Format recording system - Google Patents
Format recording systemInfo
- Publication number
- JPS61210565A JPS61210565A JP5093585A JP5093585A JPS61210565A JP S61210565 A JPS61210565 A JP S61210565A JP 5093585 A JP5093585 A JP 5093585A JP 5093585 A JP5093585 A JP 5093585A JP S61210565 A JPS61210565 A JP S61210565A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording
- servo
- pattern
- format
- 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
- 230000005291 magnetic effect Effects 0.000 claims abstract description 53
- 239000000696 magnetic material Substances 0.000 claims abstract description 23
- 230000004907 flux Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 26
- 230000005415 magnetization Effects 0.000 claims description 15
- 238000012546 transfer Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- G11B5/48—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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、データを記録する媒体面にサーボ情報を記録
するいわゆるデータ面サーボ方式のフォーマット記録方
式に係シ、特に転写によシ形成された磁気記録媒体の磁
化パターンから基準信号を作成してサーボパターンとデ
ータを記録するフォーマット記録方式に係る。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a format recording method of the so-called data surface servo method in which servo information is recorded on the surface of a medium on which data is recorded. The present invention relates to a format recording method for recording servo patterns and data by creating a reference signal from the magnetization pattern of a magnetic recording medium.
（従来技術とその問題点）
近年、磁気記録媒体例えは磁気ディスクではデータ面に
領域を定めてサーボ情報を記録する（以下、サーボセク
タという。）いわゆるデータ面サーボ方式が注目されて
いる。この方式は、従来の主流であったサーボ面サーボ
方式と比較し【、熱的オフトラックが生じにくい等の理
由から、高トラツク化にむいていると考えられている。(Prior Art and its Problems) In recent years, a so-called data surface servo method has been attracting attention in a magnetic recording medium, such as a magnetic disk, in which servo information is recorded in a defined area on the data surface (hereinafter referred to as servo sector). Compared to the conventional servo surface servo method, this method is thought to be suitable for achieving high tracking because thermal off-track is less likely to occur.
また、このサーボセクタは通常サーボトラックライタと
呼ばれている装置によルあらかじめ磁気ディスクに記録
すゐ。Further, this servo sector is usually recorded on the magnetic disk in advance by a device called a servo track writer.
サーボトラックライタでは、スピンドル軸に取シクけた
エンコーダを光で検出して信号を作成する等の方法によ
り、基準信号を得て、これに基づいてサーボセクタ及び
フォーマットデータを記録している。この方式は、従来
の長手記録方式のように低密度の記録の場合には、エン
コーダを光で検出する方式でも得られた基準信号の精度
はそれ程問題とはならなかったが、最近のように高密度
の記録が行なわれるようになると、上述の問題は非常に
重大でアシ、スピンドルモータの回転変動、ヘッドと媒
体のスペーシング及びエンコーダの精度を加味すると実
現は難しい。In a servo track writer, a reference signal is obtained by a method such as creating a signal by optically detecting an encoder attached to a spindle shaft, and servo sectors and format data are recorded based on this signal. With this method, in the case of low-density recording such as in the conventional longitudinal recording method, the accuracy of the reference signal obtained even with the method of detecting the encoder using light did not pose much of a problem, but recently, When high-density recording is performed, the above-mentioned problems become very serious and difficult to realize when taking into account reeds, rotational fluctuations of the spindle motor, spacing between the head and the medium, and encoder accuracy.
これに対し、磁気ディスクに基準信号を記録しておき常
にヘッドでこれを再生しながら、別のヘッドでフォーマ
ットを行う方式も考えられるが、基準信号の記録精度、
両ヘッドのアジマス等の問題で、高密度ではやけシ実現
は難しい。On the other hand, it is possible to consider a method in which a reference signal is recorded on a magnetic disk and a head is constantly reproducing it while formatting is performed using another head, but the recording accuracy of the reference signal
Due to problems such as the azimuth of both heads, it is difficult to achieve high density.
また、上述のどちら○方法にしても、磁気ディスク装置
上でのサーボセクタを含めたフォーマット、いわゆるセ
ルフフォーマットは非常に因数でおる。In addition, in either method described above, formatting including servo sectors on the magnetic disk device, so-called self-formatting, is a significant factor.
これに対して、米国特許第４８６へ７１１−＠に詳細に
述べられているように、磁気転写によりサーボパターン
を磁気ディスクに記録する方法がある。On the other hand, as described in detail in US Pat. No. 486-711-@, there is a method of recording servo patterns on a magnetic disk by magnetic transfer.
これは転写用原盤をエツチング等の手法によシ物理的に
形状を変化させて、あらかじめ一方向に磁化された磁気
ディスクに密着させ、磁化されている方向と逆方向に直
流磁界を印加して、磁気シールド効果を用いて、上述の
転写用原盤に対応したパパターンを、磁気ディスクに転
写する方法である。This involves physically changing the shape of the transfer master using techniques such as etching, bringing it into close contact with a magnetic disk that has been previously magnetized in one direction, and applying a DC magnetic field in the opposite direction to the direction of magnetization. , is a method of transferring a pattern corresponding to the above-described transfer master to a magnetic disk using a magnetic shielding effect.
転写用原盤を作成する方法は、特願昭５９−２０６４０
９号公報等に詳細に述べられているが、転写用原盤があ
る程度の厚さを必要とすること、高密度の場合には物理
的に形状を変化させたパターンが非常に微細なものとな
る等の理由から、所望の形状に対する誤差が大きくなシ
、実際に転写して得られたサーボ情報は必ずしも正しい
値を示しているとは限らない。従って、サーボパターン
を転写によシ形成することは実現は難しい。The method for creating a master disc for transcription is described in Japanese Patent Application No. 59-20640.
Although it is stated in detail in Publication No. 9, etc., the master disk for transfer needs to have a certain thickness, and in the case of high density, the pattern whose shape is physically changed becomes extremely fine. For these reasons, the error with respect to the desired shape is large, and the servo information actually obtained by transfer does not necessarily indicate correct values. Therefore, it is difficult to form a servo pattern by transfer.
（発明の目的）
本発明の目的は、上述の問題点を解消することＫよシ、
高密度の記録においても十分精度よくまた、セルフフォ
ーマットも可能であるフォーマット記録方式を提供する
ことである。(Object of the invention) The object of the present invention is to solve the above-mentioned problems.
It is an object of the present invention to provide a format recording method that is sufficiently accurate even in high-density recording and also allows self-formatting.
（発明の構成）
本発明によれば、磁気記録媒体のデータ面に領域を定め
てサーボ情報を記録するサーボ方式のフォーマット記録
方式において、物理的に一部分の形状を変化させた磁性
材と磁気記録媒体とを密着配置して、前記磁性材の上方
に膜面と平行な方向に磁束が通るように構成された磁性
部材を配置して相対的に移動させて前記磁気記録媒体に
前記磁性材に対応した磁化パターンを転写し、磁気ヘッ
ドを用いて前記磁化パターンから基準信号を作成し、該
基準信号に基づいてサーボパターンとフォーマットデー
タを記録するフォーマット記録方式％式％
以下本発明の実施例について図面を参照して詳細に説明
する。(Structure of the Invention) According to the present invention, in a servo format recording method in which servo information is recorded by defining an area on the data surface of a magnetic recording medium, a magnetic material and a magnetic recording medium in which the shape of a part of the magnetic recording medium is physically changed are used. A magnetic member configured to allow magnetic flux to pass in a direction parallel to the film surface is placed above the magnetic material, and is moved relative to the magnetic recording medium to contact the magnetic material. A format recording method in which a corresponding magnetization pattern is transferred, a reference signal is created from the magnetization pattern using a magnetic head, and a servo pattern and format data are recorded based on the reference signal.The following is an example of the present invention. This will be explained in detail with reference to the drawings.
第１図は本発明の一実施例を適用したフォーマット記録
装置を示すブロック図である。磁気ディスクＩＩＫ転写
された磁化パターンを磁気ヘッド１２で再生する。再生
した信号を増幅器１３で増幅し、検出回路１４で転写さ
れた磁化パターンに対応する信号を検出して、基準信号
を作成する。FIG. 1 is a block diagram showing a format recording device to which an embodiment of the present invention is applied. The magnetic head 12 reproduces the magnetization pattern transferred to the magnetic disk IIK. The reproduced signal is amplified by an amplifier 13, and a detection circuit 14 detects a signal corresponding to the transferred magnetization pattern to create a reference signal.
この基準信号を基にサーボパターンデータ発生回路１５
で、サーボセクタあるいはフォーマットデータを発生さ
せ、磁気ヘッド１２で記録する。この場合、本実施例に
おいては、物理的に一部分の形状を変化させた磁性材１
６を磁気ディスク１１上に′ｌＢ！配置して、この磁性
材１６に対応した磁化パターンを磁気ディスクＩＩＫ転
写するようになっている。Based on this reference signal, the servo pattern data generation circuit 15
Then, servo sectors or format data are generated and recorded by the magnetic head 12. In this case, in this embodiment, the magnetic material 1 whose shape is physically changed is
6 on the magnetic disk 11 'lB! A magnetization pattern corresponding to the magnetic material 16 is transferred onto the magnetic disk IIK.
第２図は、との物理的に一部分の形状を変化させた磁性
材の一例の模式的平面図を示したものである。磁性材２
１には、例えばエツチング、メッキあるいはレーザ加工
等によシおおぎ形のスルーホール２２が形成されている
。おおぎ形の弧をなさない向いあった２辺の延長が、磁
性材２１の中心で交わるように形成されかつ、転写され
る磁気ディスクの使用領域よシ長めに転写するようＫな
っている。FIG. 2 shows a schematic plan view of an example of a magnetic material in which the shape of a part of the magnetic material is physically changed. Magnetic material 2
1 has a through hole 22 formed therein by, for example, etching, plating, or laser processing. The extensions of the two opposing sides that do not form an arc of the oval shape are formed so as to intersect at the center of the magnetic material 21, and are adapted to be transferred longer than the usable area of the magnetic disk to be transferred.
第３図（ａ）〜（Ｃ）は、基準信号の作成方法示した説
明図である。FIGS. 3(a) to 3(C) are explanatory diagrams showing a method for creating a reference signal.
まず最初に同図（ａ）について説明する。磁気ディスク
３３の上方に磁性材３２を密着して配置し、その上方に
磁気ヘッド３１を配置して、直流電流を印加する。磁気
ヘッド３１からは、直流磁界５０が発生し、磁性材３２
及び磁気ディスク３３の中を磁束が通る。磁性材３２に
形成されたスルーホール２２０部分では、直流磁界５０
に対応した磁化方向３６に磁化される。これに対し磁性
領域の下の磁気ディスク３３には、磁気シールド効果に
よシ磁化方向３６とは逆の磁化方向３４及び３８に磁化
される。その際、磁化遷移点３５及び３７が形成される
。First, FIG. 5(a) will be explained. A magnetic material 32 is placed above the magnetic disk 33 in close contact with the magnetic material 32, a magnetic head 31 is placed above the magnetic material 32, and a direct current is applied. A DC magnetic field 50 is generated from the magnetic head 31, and the magnetic material 32
A magnetic flux passes through the magnetic disk 33. In the through hole 220 portion formed in the magnetic material 32, the DC magnetic field 50
It is magnetized in a magnetization direction 36 corresponding to . On the other hand, the magnetic disk 33 below the magnetic region is magnetized in magnetization directions 34 and 38 opposite to the magnetization direction 36 due to the magnetic shielding effect. In this case, magnetization transition points 35 and 37 are formed.
同図（ｂ）は、同図（ａ）で転写された磁気ディスク３
３を磁気ヘッド３１で再生した時の再生信号３９を表わ
しておシ、ビーク４０及び４１はそれぞれ磁化遷移点３
５及び３７に対応している。この再生（［１３９ヲｈる
スレッシュホールドレベル４２を設定して、その値に達
した時点４３を検出する。Figure (b) shows the magnetic disk 3 transferred in figure (a).
3 represents the reproduced signal 39 when reproduced by the magnetic head 31, and the peaks 40 and 41 represent the magnetization transition point 3, respectively.
5 and 37. A threshold level 42 is set for this reproduction (139), and a time 43 when that value is reached is detected.
同図（Ｃ）は、ビーク４１を検出するだめのゲート信号
４４を示したものである。ゲート信号４４は、スレッシ
ユホールドに達した時点４３からある一定期間の遅延時
間４５を設定して、ゲート信号４４をローレベルニスる
。このローレベルの間でビーク４１を検出して、基準信
号を作成する。サーボセクタ及びフォーマットデータは
この基準信号に基づいて記録する。FIG. 4C shows the gate signal 44 used to detect the peak 41. For the gate signal 44, a delay time 45 of a certain period from the time point 43 when the threshold is reached is set, and the gate signal 44 is changed to a low level. The peak 41 is detected between these low levels and a reference signal is created. Servo sector and format data are recorded based on this reference signal.
基準信号は各セクタ毎に得られることが望ましく、それ
により各セクタのギャップで誤差を吸収することができ
る。これは、磁性材３２の厚さから考えて形成するスル
ーホールのトラック方向の間隔寸法の精度を数％程度の
誤差におさえることが現在のところ限界であるが、この
誤差分はギャップの長さ金越えない。It is desirable that the reference signal be obtained for each sector, so that errors can be absorbed in the gaps between each sector. Considering the thickness of the magnetic material 32, the current limit is to limit the accuracy of the spacing dimensions of the through holes in the track direction to an error of about a few percent, but this error is limited to the length of the gap. It's not worth the money.
本発明のフォーマット記録方式によれば、垂直記録のよ
うな高密度の記録方式に対しても同様の方式でフォーマ
ット記録できる。According to the format recording method of the present invention, format recording can be performed in a similar manner even in high-density recording methods such as perpendicular recording.
また、ヘッドのアクチュエーターとの組み合せを考えれ
ば、磁気ディスク装置でのセルフフォーマットも容易に
行うことができる。例えば、フロッピーディスクのよう
にロールシートから所望の大きさに打ちぬいて作成され
る場合には、打ちぬき装置自体に転写機構を設けて、打
ちぬく際に同時に転写することもでき、コストの低減も
合せて実現できる。従来の転写によりサーボパターンを
記録する方式に比較して、磁性材は非常に単純な形で形
成するため、より精度しく、低価格で得ることができる
。Furthermore, if the combination with the head actuator is considered, self-formatting in a magnetic disk device can be easily performed. For example, when creating a floppy disk by punching out a desired size from a roll sheet, the punching device itself can be equipped with a transfer mechanism to perform the transfer at the same time as punching, reducing costs. can also be achieved. Compared to the conventional method of recording servo patterns by transfer, the magnetic material is formed in a very simple form, so it can be obtained with higher precision and at a lower cost.
（発明の効果）
本発明のフォーマット記録方式は、以上説明したように
、単純な形の磁性材を用いて転写した磁化パターンから
、基準信号を作成して、サーボパターン及びフォーマッ
トデータを記録するため、高密度の記録に際しても高循
度にフォーマットが行なえ且つ、磁気ディスク装置のヘ
ッドのアクチェエータとの組み合せにょシセルフフォー
マットも行うことが可能である。(Effects of the Invention) As explained above, the format recording method of the present invention is for creating a reference signal from a magnetization pattern transferred using a simple magnetic material and recording a servo pattern and format data. Even during high-density recording, formatting can be performed with a high circulation rate, and self-formatting can also be performed in combination with the actuator of the head of a magnetic disk device.
第１図は本発明の一実施例を適用したフォーマ成方法を
示す説明図である。
１１．３３・・・・・・磁気ディスク、１２−・・・・
・磁気ヘッド、１３−・・・・・増幅器、１４・・・・
・・検出回路、１５・・・・・・サーボパターンデータ
発生回路、１６．２１゜３２・・・・・・磁性材、ｚ２
・・・・・・スルーホール、３１・・・・・・磁気ヘッ
ド、３９・・・・・・再生信号、４４・・・・・・ゲー
ト信号、５０・・・・・・鉦ｆｉＩＬｆｉｉ界。
代理人 弁理士 内 原／ ｔ −′°゛（第 ２
ｆｆｉFIG. 1 is an explanatory diagram showing a former forming method to which an embodiment of the present invention is applied. 11.33...Magnetic disk, 12-...
・Magnetic head, 13-...Amplifier, 14...
...Detection circuit, 15...Servo pattern data generation circuit, 16.21゜32...Magnetic material, z2
...Through hole, 31...Magnetic head, 39...Reproduction signal, 44...Gate signal, 50...Gong fiILfii field. Agent Patent Attorney Uchihara / t −′°゛ (Second
ffi
Claims (1)
録するサーボ方式のフォーマット記録方式において、物
理的に一部分の形状を変化させた磁性材と前記磁気記録
媒体とを密着配置して、前記磁性材の上方に膜面と平行
な方向に磁束が通るように構成された磁性部材を配置し
て相対的に移動させて前記磁気記録媒体に前記磁性材に
対応した磁化パターンを転写し、磁気ヘッドを用いて前
記磁化パターンから基準信号を作成し、該基準信号に基
づいてサーボパターンとフォーマットデータを記録する
ことを特徴とするフォーマット記録方式。In a servo format recording method in which servo information is recorded by defining an area on the data surface of a magnetic recording medium, a magnetic material whose shape has been partially changed and the magnetic recording medium are placed in close contact with each other to record the magnetic material. A magnetic member configured to allow magnetic flux to pass in a direction parallel to the film surface is placed above the material and moved relatively to transfer a magnetization pattern corresponding to the magnetic material onto the magnetic recording medium, and a magnetic head A format recording method characterized in that a reference signal is created from the magnetization pattern using a servo pattern and a servo pattern and format data are recorded based on the reference signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5093585A JPS61210565A (en) | 1985-03-14 | 1985-03-14 | Format recording system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5093585A JPS61210565A (en) | 1985-03-14 | 1985-03-14 | Format recording system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61210565A true JPS61210565A (en) | 1986-09-18 |
Family
ID=12872675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5093585A Pending JPS61210565A (en) | 1985-03-14 | 1985-03-14 | Format recording system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61210565A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6858328B1 (en) | 1998-03-20 | 2005-02-22 | Matsushita Electric Industrial Co., Ltd. | Master information support |
| US6961196B2 (en) | 1996-07-22 | 2005-11-01 | Matsushita Electric Industrial Co., Ltd. | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier |
-
1985
- 1985-03-14 JP JP5093585A patent/JPS61210565A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6961196B2 (en) | 1996-07-22 | 2005-11-01 | Matsushita Electric Industrial Co., Ltd. | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier |
| US6858328B1 (en) | 1998-03-20 | 2005-02-22 | Matsushita Electric Industrial Co., Ltd. | Master information support |
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