JP5620664B2 - Magnetic recording / reproducing device - Google Patents

Magnetic recording / reproducing device Download PDF

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JP5620664B2
JP5620664B2 JP2009232557A JP2009232557A JP5620664B2 JP 5620664 B2 JP5620664 B2 JP 5620664B2 JP 2009232557 A JP2009232557 A JP 2009232557A JP 2009232557 A JP2009232557 A JP 2009232557A JP 5620664 B2 JP5620664 B2 JP 5620664B2
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magnetic
head
recording
magnetic recording
reproducing
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JP2011081864A (en
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勉 西橋
勉 西橋
正 森田
正 森田
中村 久三
久三 中村
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Ulvac Inc
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/64Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition

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Description

本発明は、磁気記録再生装置に係り、より詳細には、パターンドメディアからなるディスク上のトラック追従性能に優れた磁気記録再生装置に関する。   The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus having excellent track following performance on a disk made of patterned media.

近年、IT産業等における技術革新に伴い、磁気記録媒体の大容量化・高速化・低コスト化の研究開発が盛んに行われてきている。該磁気記録媒体の大容量化・高速化・低コスト化のためには、該磁気記録媒体における記録密度の向上が必須である。従来より、該磁気記録媒体における連続磁成膜の面内記録により、該磁気記録媒体の記録密度を向上させる試みがなされてきたが、技術的には限界を迎えつつある。   In recent years, with technological innovation in the IT industry and the like, research and development for increasing the capacity, speed, and cost of magnetic recording media has been actively conducted. In order to increase the capacity, speed, and cost of the magnetic recording medium, it is essential to improve the recording density of the magnetic recording medium. Conventionally, attempts have been made to improve the recording density of the magnetic recording medium by in-plane recording of continuous magnetic film formation on the magnetic recording medium, but the technical limit is approaching.

例えば磁気記録媒体の記録密度を高めてゆくと、最小記録単位となる「記録ビット」の面積がどんどん小さくなり、それが一定の範囲より小さくなると「熱ゆらぎ」と呼ばれる現象が起こり、常温下においても長期間の記録磁界が維持できなくなってしまう。   For example, when the recording density of a magnetic recording medium is increased, the area of the “recording bit” that is the minimum recording unit becomes smaller and smaller than a certain range, and a phenomenon called “thermal fluctuation” occurs at room temperature. However, a long-term recording magnetic field cannot be maintained.

そこで最近では、前記面内記録(長手磁気記録)に代わる新しい記録方式として「垂直磁気記録」方式が注目されてきた。垂直磁気記録は記録磁化反転での反磁界が磁化を強める方向に働くため、微細なビットでも熱安定性が高くなり高密度化に対応することができる。   Therefore, recently, the “perpendicular magnetic recording” method has attracted attention as a new recording method that replaces the in-plane recording (longitudinal magnetic recording). In perpendicular magnetic recording, the demagnetizing field due to the reversal of recording magnetization works in the direction of increasing the magnetization, so that even a fine bit has high thermal stability and can cope with high density.

また、更なる記録密度の向上を狙いとした技術として、パターンドメディア媒体を用いる垂直磁気記録媒体が提案されている。パターンドメディア媒体は、前記磁気記録媒体における磁性膜を、連続膜とせずにドット、バー、ピラー等のパターン状とし、そのサイズをナノメートルスケールにすることにより複雑磁区ではなく単磁区構造としたメディアを用いたものである(例えば、非特許文献1参照)。記録部をパターン化し個々の記録層を分離することによってサイドクロストークを低減化することができる。   As a technique aiming at further improvement in recording density, a perpendicular magnetic recording medium using a patterned media medium has been proposed. The patterned media medium has a single magnetic domain structure instead of a complex magnetic domain by forming the magnetic film in the magnetic recording medium into a pattern of dots, bars, pillars, etc., instead of a continuous film, and by setting the size to a nanometer scale. Media is used (for example, see Non-Patent Document 1). Side crosstalk can be reduced by patterning the recording portion and separating the individual recording layers.

一方、HDDドライブの性能向上のカギが磁気記録媒体の高記録密度化にあることは確かではあるが、記録密度さえ高めれば自然に性能が向上するわけではない。記録密度が高いということは、ディスクの回転数が同じなら、再生/記録ともに、より短い時間で行なわなければならないからである。また、微細なビットを正確に読み取りヘッドで捉える位置制御技術の向上が不可欠である。   On the other hand, the key to improving the performance of HDD drives is certainly to increase the recording density of the magnetic recording medium, but if the recording density is increased, the performance will not naturally improve. The high recording density is because playback / recording must be performed in a shorter time if the rotational speed of the disk is the same. In addition, it is essential to improve position control technology for accurately capturing minute bits with a reading head.

従来の磁気記録媒体においては、シグナル情報ラインと、サーボ信号ラインとが設けられていた。
そして、記録を行う際には、前記サーボ信号ラインにて、まず磁気ヘッドにて位置制御信号を読み取り、磁気ヘッドの位置制御を行う。そしてセクタ、トラック位置を確認する。その後、所望トラックに信号を記録していた。
In a conventional magnetic recording medium, a signal information line and a servo signal line are provided.
When recording, the position control signal is first read by the magnetic head on the servo signal line to control the position of the magnetic head. Then, the sector and track positions are confirmed. Thereafter, the signal was recorded on the desired track.

例えば特許文献1では、記録ヘッドと再生ヘッドとを備えた複合磁気ヘッドを用いるとともに、磁気記録媒体の記録面において、データ領域とサーボ信号領域とを含み、データ領域の記録トラックとサーボ信号領域の記録トラックを相互に半ピッチずらして配置することで、高記録密度化を図った磁気記録再生装置が提案されているが、十分ではない。   For example, Patent Document 1 uses a composite magnetic head including a recording head and a reproducing head, and includes a data area and a servo signal area on the recording surface of the magnetic recording medium, and includes a recording track and a servo signal area in the data area. A magnetic recording / reproducing apparatus has been proposed in which the recording tracks are arranged with a half-pitch offset from each other to increase the recording density, but this is not sufficient.

このように、磁気記録媒体上にサーボ信号領域を設けておくと、その分、記録領域が減ることになってしまう。また、磁気ヘッドの位置制御と、信号の記録とを個別に行っていたのでは、記録にも時間がかかってしまい、さらなる高記録密度記録の実現は難しかった。   Thus, if the servo signal area is provided on the magnetic recording medium, the recording area is reduced accordingly. Further, if the position control of the magnetic head and the signal recording are separately performed, the recording takes time, and it is difficult to realize a higher recording density recording.

特開平5‐073872号公報JP-A-5-073872

S.Y.Chou Proc.IEEE 85(4),652(1997)S.Y.Chou Proc.IEEE 85 (4), 652 (1997)

本発明はこのような従来の実情に鑑みて考案されたものであり、記録速度を向上させ、更なる高密度記録化を実現可能な磁気記録再生装置を提供することを目的とする。   The present invention has been devised in view of such a conventional situation, and an object of the present invention is to provide a magnetic recording / reproducing apparatus capable of improving recording speed and realizing higher density recording.

本発明の請求項1に記載の磁気記録再生装置は、ディスク状の基板の片面又は両面上に、該基板面に対して垂直方向に極性が変化する磁気特性を有する局所領域が、所定の離間距離pをもって複数個同心円状に配されてなる磁気記録媒体と、前記磁気記録媒体に対して情報の書き込みを行う記録ヘッド及び前記磁気記録媒体から情報を読み出す再生ヘッドを設けた部位を含み、かつ、前記部位において記録ヘッドと前記再生ヘッドが所定の間隔dで局部的に配されてなる磁気ヘッドと、を備えた磁気記録再生装置であって、前記記録ヘッドのギャップ中心位置と、前記再生ヘッドのギャップ中心位置とは、前記dがd=np(nは3)を満たすように配置されているとともに、前記磁気記録媒体における局所領域は磁気ビットであり、該磁気ビット自体に位置情報が記憶されていること、を特徴とする。 According to a first aspect of the present invention, there is provided a magnetic recording / reproducing apparatus in which a local region having a magnetic characteristic whose polarity changes in a direction perpendicular to the substrate surface on one or both surfaces of a disk-shaped substrate is separated by a predetermined distance. A plurality of concentric magnetic recording media arranged at a distance p; a recording head for writing information to the magnetic recording medium; and a reproducing head for reading information from the magnetic recording medium; A magnetic recording / reproducing apparatus including a recording head and a magnetic head in which the reproducing head is locally arranged at a predetermined interval d in the portion, wherein the gap center position of the recording head, and the reproducing head of the gap center position, together with the d is arranged so as to satisfy d = np (n is 3), a local region in the magnetic recording medium is a magnetic bit, magnetic The position information in Tsu bets itself is stored, and wherein.

本発明の磁気記録再生装置に搭載される磁気ヘッドは、磁気記録媒体に対して情報の書き込みを行う記録ヘッド及び前記磁気記録媒体から情報を読み出す再生ヘッドを設けた部位を含み、かつ、前記部位において記録ヘッドと前記再生ヘッドが所定の間隔dで局部的に配されている。これに加えて、記録ヘッドのギャップ中心位置と、再生ヘッドのギャップ中心位置とが、d=np(nは3)を満たす間隔dをもって配されている。ゆえに、本発明の磁気記録再生装置においては、再生ヘッドにて書き込み位置を確認後、n(=3)ビット後には記録ヘッドが該書き込み位置にくることがわかる。このように、前記局所領域自体に位置情報を記憶させておくことにより、ディスク上にサーボパターン領域を設けなくて済み、高密度記録化を実現できる。また、再生ヘッドにて書き込み位置を確認後、引き続き記録ヘッドにて信号を記録することができるので、記録速度を向上させることができる。その結果、本発明では更なる高密度記録化を実現可能な磁気記録再生装置を提供することができる。


The magnetic head mounted on the magnetic recording / reproducing apparatus of the present invention includes a part provided with a recording head for writing information to a magnetic recording medium and a reproducing head for reading information from the magnetic recording medium, and the part The recording head and the reproducing head are locally arranged at a predetermined interval d. In addition to this, the gap center position of the recording head and the gap center position of the reproducing head are arranged with an interval d satisfying d = np (n is 3) . Therefore, in the magnetic recording / reproducing apparatus of the present invention, after confirming the writing position by the reproducing head, it can be seen that the recording head comes to the writing position after n (= 3) bits. Thus, by storing position information in the local area itself, it is not necessary to provide a servo pattern area on the disk, and high density recording can be realized. Further, since the signal can be continuously recorded by the recording head after the writing position is confirmed by the reproducing head, the recording speed can be improved. As a result, the present invention can provide a magnetic recording / reproducing apparatus capable of realizing higher density recording.


本発明の磁気記録再生装置の一例を模式的に示す断面図。1 is a cross-sectional view schematically showing an example of a magnetic recording / reproducing apparatus of the present invention. 本発明の磁気記録再生装置の一例を模式的に示す上面図。The top view which shows typically an example of the magnetic recording / reproducing apparatus of this invention. 磁気ヘッド及び磁気ビットの位置と、磁気信号との関係を示す図。The figure which shows the relationship between the position of a magnetic head and a magnetic bit, and a magnetic signal.

以下、本発明の磁気記録再生装置の好適な形態について説明する。   Hereinafter, preferred embodiments of the magnetic recording / reproducing apparatus of the present invention will be described.

図1及び図2は、本発明の磁気記録再生装置の一例を模式的に示す図であり、図1は断面図、図2は上面図である。
本発明の磁気記録再生装置は、ディスク状の基板10の片面又は両面(図1に示す例では片面)上に、該基板面に対して垂直方向に極性が変化する磁気特性を有する局所領域(磁気ビット31)が、所定の離間距離pをもって複数個同心円状に配されてなる磁気記録媒体1と、前記磁気記録媒体1に対して情報の書き込みを行う記録ヘッド110、及び前記磁気記録媒体1から情報を読み出す再生ヘッド120からなる磁気ヘッド100と、を備え、前記磁気ヘッド100において、前記記録ヘッド110のギャップ中心位置と、前記再生ヘッド120のギャップ中心位置とは、d=np(nは3以上の整数)を満たす間隔dをもって配されていること、を特徴とする。
1 and 2 are diagrams schematically showing an example of a magnetic recording / reproducing apparatus according to the present invention. FIG. 1 is a cross-sectional view, and FIG. 2 is a top view.
In the magnetic recording / reproducing apparatus of the present invention, a local region having a magnetic characteristic whose polarity changes in a direction perpendicular to the substrate surface on one surface or both surfaces (one surface in the example shown in FIG. 1) of the disk-shaped substrate 10. A magnetic recording medium 1 in which a plurality of magnetic bits 31) are arranged concentrically with a predetermined separation distance p, a recording head 110 for writing information to the magnetic recording medium 1, and the magnetic recording medium 1 A magnetic head 100 including a reproducing head 120 for reading information from the recording head 110. In the magnetic head 100, the gap center position of the recording head 110 and the gap center position of the reproducing head 120 are d = np (n is And an interval d that satisfies an integer of 3 or more.

本発明の磁気記録再生装置では、記録ヘッド110のギャップ中心位置と、再生ヘッド120のギャップ中心位置とが、d=np(nは3以上の整数)を満たす間隔dをもって配されているので、再生ヘッド120にて書き込み位置を確認後、nビット後には記録ヘッド110が該書き込み位置にくることがわかる。このように、前記磁気ビット31自体に位置情報を記憶させておくことにより、ディスク上にサーボパターン領域を設けなくて済み、高密度記録化を実現できる。また、再生ヘッド120にて書き込み位置を確認後、引き続き記録ヘッド110にて信号を記録することができるので、記録速度を向上させることができる。その結果、本発明の磁気記録再生装置では更なる高密度記録化を実現可能である。   In the magnetic recording / reproducing apparatus of the present invention, the gap center position of the recording head 110 and the gap center position of the reproducing head 120 are arranged with an interval d satisfying d = np (n is an integer of 3 or more). After confirming the writing position with the reproducing head 120, it can be seen that the recording head 110 comes to the writing position after n bits. Thus, by storing the position information in the magnetic bit 31 itself, it is not necessary to provide a servo pattern area on the disk, and high density recording can be realized. In addition, since the recording head 110 can continuously record a signal after confirming the writing position with the reproducing head 120, the recording speed can be improved. As a result, the magnetic recording / reproducing apparatus of the present invention can realize further high density recording.

垂直記録による記録方式にて、磁気記録媒体に対し磁気記録を行う一例としては、図1に示すように、垂直磁気記録方式の磁気ヘッド100を、磁気記録媒体1の記録層30に対向させる。   As an example of performing magnetic recording on a magnetic recording medium by a recording method by perpendicular recording, a magnetic head 100 of perpendicular magnetic recording method is opposed to a recording layer 30 of the magnetic recording medium 1 as shown in FIG.

磁気記録媒体1は、セラミック等の非磁性体からなるディスク状の基板10と、前記基板10の片面上に、この順に配された下地層20と記録層30とを有している。
そして、磁気記録媒体1は、前記記録層30において、基板面に対して垂直方向に極性が変化する磁気特性を有する磁気ビット31(局所領域)が、所定の離間距離pをもって複数個同心円状に配されてなる。磁気ビット31の列間には非磁性領域32が設けられている。
具体的には後述するように、この磁気記録媒体1においては、サーボ情報領域を設けずに、磁気ビット31自体に位置情報を記憶させておく。
The magnetic recording medium 1 has a disk-like substrate 10 made of a nonmagnetic material such as ceramic, and an underlayer 20 and a recording layer 30 arranged in this order on one surface of the substrate 10.
In the magnetic recording medium 1, in the recording layer 30, a plurality of magnetic bits 31 (local regions) having magnetic characteristics whose polarity changes in a direction perpendicular to the substrate surface are concentrically formed with a predetermined separation distance p. It is arranged. A nonmagnetic region 32 is provided between the magnetic bit 31 columns.
Specifically, as will be described later, in the magnetic recording medium 1, the position information is stored in the magnetic bit 31 itself without providing the servo information area.

磁気ヘッド100は、磁気記録媒体1に対して情報の書き込みを行う記録ヘッド110、及び磁気記録媒体1から情報を読み出す再生ヘッド120からなる。なお、図1及び図2において示した磁気ヘッド100は、記録ヘッド110と再生ヘッド120を設けた部位を拡大して示した部分模式図であり、その全体は省略して示してある。
磁気ヘッド100において、記録ヘッド110及び再生ヘッド120としては、特に制限はなく、目的に応じて適宜選択することができる。記録ヘッド110としては、例えば、単磁極ヘッド等が好適に挙げられる。また、再生ヘッド120としては、例えば、GMRヘッド等が好適に挙げられる。
The magnetic head 100 includes a recording head 110 that writes information to the magnetic recording medium 1 and a reproducing head 120 that reads information from the magnetic recording medium 1. The magnetic head 100 shown in FIG. 1 and FIG. 2 is a partial schematic view showing an enlarged portion where the recording head 110 and the reproducing head 120 are provided, and the whole is omitted.
In the magnetic head 100, the recording head 110 and the reproducing head 120 are not particularly limited and may be appropriately selected depending on the purpose. As the recording head 110, for example, a single magnetic pole head or the like is preferably used. Further, as the reproducing head 120, for example, a GMR head or the like is preferably exemplified.

そして本発明の磁気記録再生装置では、前記磁気ヘッド100において、前記記録ヘッド110のギャップ中心位置と、前記再生ヘッド120のギャップ中心位置とは、d=np(nは3以上の整数)を満たす間隔dをもって配されていること、を特徴とする。   In the magnetic recording / reproducing apparatus of the present invention, in the magnetic head 100, the gap center position of the recording head 110 and the gap center position of the reproducing head 120 satisfy d = np (n is an integer of 3 or more). It is characterized by being arranged with an interval d.

従来の磁気記録媒体では、ディスク面上にサーボ情報領域が設けられていた。このサーボ情報領域には、磁気ヘッド(記録ヘッド及び再生ヘッド)とトラックとの位置情報、及び、セクタ、トラックの記録再生領域情報の2つの情報が格納されている。   In a conventional magnetic recording medium, a servo information area is provided on the disk surface. In the servo information area, two pieces of information are stored: position information between the magnetic head (recording head and reproducing head) and the track, and recording / reproducing area information of the sector and track.

本発明では、ディスク面上にサーボ情報領域を設けずに、直接磁気ビットからトラック情報、ヘッド位置修正情報を得て再生及び記録をする。すなわち、磁気ビット自体に位置情報を記憶させておく。これによりディスク面上にサーボ情報領域を設けなくて済み、高密度記録化を実現できる。   In the present invention, without providing a servo information area on the disk surface, track information and head position correction information are obtained directly from a magnetic bit and reproduced and recorded. That is, position information is stored in the magnetic bit itself. As a result, it is not necessary to provide a servo information area on the disk surface, and high density recording can be realized.

以下、本発明の磁気記録再生装置におけるサーボ動作について説明する。なお、以下の説明では、n=3の場合を例に挙げて説明する。なお、本発明ではこの例に限定されるものではなく、n=3以外の場合にも同様に適用可能である。   The servo operation in the magnetic recording / reproducing apparatus of the present invention will be described below. In the following description, the case of n = 3 will be described as an example. Note that the present invention is not limited to this example, and can be similarly applied to cases other than n = 3.

(1)まず、磁気記録媒体1において、磁気ビット31の配置にルールを設けておく。例えば、図1(a)に示すように、回転方向において、磁気ビット31の磁気パターンを「N極、N極、N極、S極」と設定しておく。このとき、回転の最初から3つめまでは、N極、N極、N極の磁気ビット31nをセクタと認識させ、S極の磁気ビット31pをセクタのエッジ(境界)と認識させる。 (1) First, in the magnetic recording medium 1, a rule is provided for the arrangement of the magnetic bits 31. For example, as shown in FIG. 1A, the magnetic pattern of the magnetic bit 31 is set to “N pole, N pole, N pole, S pole” in the rotation direction. At this time, from the beginning to the third rotation, the magnetic bit 31n of N pole, N pole, and N pole is recognized as a sector, and the magnetic bit 31p of S pole is recognized as an edge (boundary) of the sector.

(2)そして、磁気ヘッド100を内径から外径方向にスキャンして、磁気ビットのトラック数とトラックピッチを入手する。線速度一定にて回転する磁気記録媒体1に対する、磁気ヘッド100の移動角度θを記憶させておく。 (2) Then, the magnetic head 100 is scanned from the inner diameter toward the outer diameter to obtain the number of tracks and the track pitch of the magnetic bits. The moving angle θ of the magnetic head 100 with respect to the magnetic recording medium 1 rotating at a constant linear velocity is stored.

(3)トラック位置の設定後に、読み取り信号波形が最大となるように、再生ヘッド120のギャップの中心位置と、磁気ビット31の中心位置とを合わせる。
ここで、図3は、図2における磁気ヘッド100と磁気ビット31との位置と、磁気信号との関係を示す図である。図2中、B、Cの位置、すなわち磁気ビット31の中心から離れたところを磁気ヘッド100が走行した場合、図3(b)(c)に示すように、読み取り磁気信号の波形が小さくなるが、図2中、Aの位置、すなわち磁気ビット31の中心上を磁気ヘッド100が走行した場合、図3(a)に示すように、読み取り磁気信号の波形は大きくなる。すなわち、図3(a)に示すように、波形の高さが一番大きくなるところを磁気ヘッド100が走行するようにする。これにより再生ヘッド120のギャップの中心位置と、磁気ビット31の中心位置とを合わせることができる。
(3) After setting the track position, the center position of the gap of the reproducing head 120 and the center position of the magnetic bit 31 are matched so that the read signal waveform becomes maximum.
Here, FIG. 3 is a diagram showing the relationship between the position of the magnetic head 100 and the magnetic bit 31 in FIG. 2 and the magnetic signal. In FIG. 2, when the magnetic head 100 travels at positions B and C, that is, away from the center of the magnetic bit 31, the waveform of the read magnetic signal becomes small as shown in FIGS. However, when the magnetic head 100 travels at the position A in FIG. 2, that is, on the center of the magnetic bit 31, as shown in FIG. 3A, the waveform of the read magnetic signal becomes large. That is, as shown in FIG. 3A, the magnetic head 100 is made to travel where the waveform has the highest height. Thereby, the center position of the gap of the reproducing head 120 and the center position of the magnetic bit 31 can be matched.

(4)そして、基板10走行時にピックアップされる磁気ビット31信号の周波数を再生ヘッド120にて確認した後に、記録ヘッド110にて、所望の磁化を磁気ビット31に書き込む。
図1(a)に示すように、磁気ビットの上に磁気ヘッド100がのったとき、再生ヘッド120でS極の磁気ビット31sの位置[図1(a)に点線で表示した位置]を認識する。このとき、記録ヘッド110のギャップ中心位置と、再生ヘッド120のギャップ中心位置とは、d=3pだけ離間して配されているので、図1(b)に示すように、再生ヘッド120でS極の磁気ビット31sの位置[図1(b)に点線で表示した位置]を認識した3ビット後には、記録ヘッド110がS極の磁気ビット31sの位置にくると判断できる。すなわち、再生ヘッド120でS極の磁気ビット31sの位置を認識してから3ビット後に、書き込みヘッドで書き込みを始める。
(4) Then, after confirming the frequency of the magnetic bit 31 signal picked up when the substrate 10 travels with the reproducing head 120, the recording head 110 writes desired magnetization into the magnetic bit 31.
As shown in FIG. 1A, when the magnetic head 100 is placed on the magnetic bit, the position of the magnetic pole 31s of the S pole on the reproducing head 120 [the position indicated by the dotted line in FIG. recognize. At this time, the gap center position of the recording head 110 and the gap center position of the reproducing head 120 are spaced apart by d = 3p. Therefore, as shown in FIG. It can be determined that the recording head 110 comes to the position of the magnetic pole 31s of the S pole 3 bits after the position of the magnetic bit 31s of the pole [the position indicated by the dotted line in FIG. 1B] is recognized. That is, after the reproducing head 120 recognizes the position of the magnetic pole 31s of the south pole, writing is started by the write head 3 bits later.

このように本発明では、磁気ビット自体に位置情報を記憶させておくことにより、ディスク上にサーボパターン領域を設けなくて済み、高密度記録化を実現できる。また、再生ヘッドにて書き込み位置を確認後、引き続き記録ヘッドにて信号を記録することができるので、記録速度を向上させることができる。その結果、本発明の磁気記録再生装置では、更なる高密度記録化を実現可能である。   As described above, in the present invention, by storing position information in the magnetic bit itself, it is not necessary to provide a servo pattern area on the disk, and high density recording can be realized. Further, since the signal can be continuously recorded by the recording head after the writing position is confirmed by the reproducing head, the recording speed can be improved. As a result, the magnetic recording / reproducing apparatus of the present invention can realize further high density recording.

以上、本発明の磁気記録再生装置について説明してきたが、本発明は上述した例に限定されるものではなく、発明の趣旨を逸脱しない範囲で適宜変更可能である。   The magnetic recording / reproducing apparatus of the present invention has been described above. However, the present invention is not limited to the above-described example, and can be appropriately changed without departing from the spirit of the invention.

本発明は、ディスク状の磁気記録媒体と、磁気ヘッドとを備えた磁気記録再生装置に適用可能である。   The present invention is applicable to a magnetic recording / reproducing apparatus including a disk-shaped magnetic recording medium and a magnetic head.

1 磁気記録媒体、10 基板、20 下地層、30 記録層、31 磁気ビット(局所領域)、32 非磁性領域、100 磁気ヘッド、110 記録ヘッド、120 再生ヘッド。   DESCRIPTION OF SYMBOLS 1 Magnetic recording medium, 10 Substrate, 20 Underlayer, 30 Recording layer, 31 Magnetic bit (local area), 32 Nonmagnetic area, 100 Magnetic head, 110 Recording head, 120 Playback head

Claims (3)

ディスク状の基板の片面又は両面上に、該基板面に対して垂直方向に極性が変化する磁気特性を有する局所領域が、所定の離間距離pをもって複数個同心円状に配されてなる磁気記録媒体と、
前記磁気記録媒体に対して情報の書き込みを行う記録ヘッド及び前記磁気記録媒体から情報を読み出す再生ヘッドを設けた部位を含み、かつ、前記部位において記録ヘッドと前記再生ヘッドが所定の間隔dで局部的に配されてなる磁気ヘッドと、を備えた磁気記録再生装置であって、
前記記録ヘッドのギャップ中心位置と、前記再生ヘッドのギャップ中心位置とは、前記dがd=np(nは3)を満たすように配置されているとともに、前記磁気記録媒体における局所領域は磁気ビットであり、該磁気ビット自体に位置情報が記憶されていること、を特徴とする磁気記録再生装置。
A magnetic recording medium in which a plurality of local regions having magnetic characteristics whose polarity changes in a direction perpendicular to the substrate surface are arranged concentrically with a predetermined separation distance p on one or both surfaces of a disk-shaped substrate When,
Including a recording head for writing information to the magnetic recording medium and a portion provided with a reproducing head for reading information from the magnetic recording medium, and the recording head and the reproducing head are locally located at a predetermined interval d in the portion. A magnetic recording / reproducing apparatus comprising a magnetic head,
The gap center position of the recording head and the gap center position of the reproducing head are arranged so that d satisfies d = np (n is 3), and the local area in the magnetic recording medium is a magnetic bit. A magnetic recording / reproducing apparatus characterized in that position information is stored in the magnetic bit itself .
前記磁気記録媒体はサーボ情報(サーボパターン)領域が不要であること、を特徴とする請求項1に記載の磁気記録再生装置。   The magnetic recording / reproducing apparatus according to claim 1, wherein the magnetic recording medium does not require a servo information (servo pattern) area. 前記再生ヘッドの読み取り信号の波形に基づき、再生ヘッドのギャップ中心位置と、前記磁気ビットの中心位置とを合せる構成を備えていること、を特徴とする請求項1に記載の磁気記録再生装置。   2. The magnetic recording / reproducing apparatus according to claim 1, further comprising a configuration in which a gap center position of the reproducing head is aligned with a center position of the magnetic bit based on a waveform of a read signal of the reproducing head.
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