JPH05151571A - Recording method for rewritable optical recording medium - Google Patents
Recording method for rewritable optical recording mediumInfo
- Publication number
- JPH05151571A JPH05151571A JP31651791A JP31651791A JPH05151571A JP H05151571 A JPH05151571 A JP H05151571A JP 31651791 A JP31651791 A JP 31651791A JP 31651791 A JP31651791 A JP 31651791A JP H05151571 A JPH05151571 A JP H05151571A
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- JP
- Japan
- Prior art keywords
- recording
- mark
- marks
- recorded
- layer
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザービーム等によ
り情報を高密度，大容量で記録再生および消去できる書
換型光記録媒体の記録方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method for a rewritable optical recording medium capable of recording / reproducing and erasing information with a high density and a large capacity by using a laser beam or the like.
【０００２】[0002]
【従来の技術】大容量で高密度なメモリとして光記録媒
体が注目されており、現在、情報の消去・再記録が可能
である書換型と呼ばれるものの開発が進められている。
この書換型の光ディスクのひとつとして、Ｔe−Ｇe−Ｓ
b合金薄膜を記録層として用い、レーザ光の照射により
記録層を加熱し，溶融し，急冷することにより非晶質化
して情報を記録し、またこれを加熱し徐冷することによ
り結晶化して情報を消去するものがある。図６は一般的
な書換型光記録媒体を示した断面図である。図６におい
て、中心穴を有する円盤上の透明樹脂材料からなる基板
61に誘電体からなる第１の保護層62，記録層63，誘電体
からなる第２の保護層64，金属薄膜からなる反射層65を
形成し、その上に接着剤66を介して保護板67を設けたも
のである。ここで、記録層63にＴe−Ｇe−Ｓb合金薄膜
を用いた場合、この結晶化速度が速いため、単一のレー
ザの強度を変調して照射するだけで非晶質化および結晶
化ができる。従って、この書換型光記録媒体は、一般に
オーバライトと呼ばれる単一のレーザ光による情報の書
換えが可能である。2. Description of the Related Art An optical recording medium has attracted attention as a large-capacity and high-density memory, and at present, a rewritable type capable of erasing and re-recording information is under development.
One of the rewritable optical disks is Te-Ge-S.
The b-alloy thin film is used as a recording layer, and the recording layer is heated by laser light irradiation, melted, and rapidly cooled to become amorphous so that information is recorded, and this is heated and gradually cooled to be crystallized. Some erase information. FIG. 6 is a sectional view showing a general rewritable optical recording medium. 6, a substrate made of a transparent resin material on a disk having a central hole
A first protective layer 62 made of a dielectric material, a recording layer 63, a second protective layer 64 made of a dielectric material, and a reflective layer 65 made of a metal thin film are formed on 61, and a protective plate is provided thereon with an adhesive 66. 67 is provided. Here, when a Te—Ge—Sb alloy thin film is used for the recording layer 63, this crystallization speed is high, so that it can be amorphized and crystallized only by modulating and irradiating the intensity of a single laser. .. Therefore, this rewritable optical recording medium is capable of rewriting information by a single laser beam generally called overwrite.
【０００３】[0003]
【発明が解決しようとする課題】ここで、書換型の光デ
ィスクにおいて既存のデータを書換える従来の方法を相
変化光ディスクの場合について図７により説明する。図
７(a)は書換型の光ディスク上に形成されたマークを示
している。記録マークを書換える場合相変化光ディスク
は前述したようにオーバライトにより書換えられる。書
換え課程において図７(b)に示すように、既に記録され
ているトラックのデータパターンと異なったデータパタ
ーンを記録したり、同じデータパターンを再記録する場
合でも、記録開始点が光記録装置の記録時の制御変動な
どで、新たに記録するマークが既に形成されていたマー
クの位置に対して部分的に重なって記録される場合があ
る。一般に相変化光ディスクへのマークの記録として、
マークが非晶質では状態を選ぶと、消去状態は結晶状態
となる。このことから、非晶質の領域であるマークと結
晶状態である消去領域は一般に屈折率が変わる。屈折率
が変わると、非晶質であるマーク領域と結晶状態である
消去領域のレーザ光の吸収率が変わる。吸収率は、図６
に示した光ディスクにおいて各層の膜厚が変われば変化
するが、ここでは、一例としてマーク領域の吸収率が消
去領域の吸収率よりも高い場合を考える。この場合につ
いて、同じ照射強度のレーザ光を照射したとき、マーク
領域の方が消去領域に比べ温度が上がることになる。特
に図７(b)のように既存のマークに幾らか重なって記録
する場合、レーザー光が既存のマークと重なっている領
域Ａは重なっていない領域Ｂに比べて温度が高くなると
考えられる。ここで、光記録媒体の断面方向の温度分布
を考える。図８は図７(b)マーク領域の温度分布をＸ方
向に切った断面図である。記録層80を第１の保護層81と
第２の保護層82ではさんだ構造になっている。実際に
は、基板，反射層，接着剤，保護板が存在するが、ここ
では簡略化のため省略している。記録層80にレーザー光
83が照射された場合、記録層80が発熱し第１の保護層81
および第２の保護層82の膜厚方向の温度は記録層80に近
い方が温度が高くなる。このため、第１の保護層81およ
び第２の保護層82は熱膨張するが、記録層80に近い方が
より膨張量が多くなり記録層80側にたわむと考えられ
る。さらに、図８のようにレーザー光83が既存のマーク
と幾らか重なって照射されたとき、マークと重なってい
る領域Ａの温度は重なっていない領域Ｂに比べて高くな
る。このため、領域Ａに近い保護層がより記録層側にた
わみ、記録層80のレーザ光による溶融された部分は領域
Ｂの方向に押し出されることになり、記録層が移動する
ことになる。この現象が既記録マークに対して幾らか重
ねて書換えを何回も繰り返すと、記録層80が順次移動す
ることにより膜厚変動や記録層のない部分が発生し、正
常な記録ができなくなるという問題があった。Here, a conventional method for rewriting existing data in a rewritable type optical disc will be described with reference to FIG. 7 in the case of a phase change optical disc. FIG. 7A shows a mark formed on a rewritable optical disc. When rewriting the recording mark, the phase change optical disk is rewritten by overwriting as described above. In the rewriting process, as shown in FIG. 7 (b), even when a data pattern different from the data pattern of the already recorded track is recorded or the same data pattern is re-recorded, the recording start point is the optical recording device. A mark to be newly recorded may be partially overlapped and recorded with respect to the position of the mark that has already been formed due to control fluctuations during recording. Generally, as a mark recording on a phase change optical disc,
If the mark is amorphous and the state is selected, the erased state becomes a crystalline state. From this, the refractive index generally changes between the mark, which is an amorphous region, and the erased region, which is a crystalline state. When the refractive index changes, the absorptance of laser light in the amorphous mark region and the crystalline erase region changes. Absorption rate is shown in Figure 6.
In the optical disc shown in (1), it changes if the film thickness of each layer changes, but here, as an example, consider the case where the absorptance of the mark region is higher than that of the erased region. In this case, when the laser light having the same irradiation intensity is applied, the temperature of the mark area becomes higher than that of the erase area. In particular, when recording is performed with some overlap on the existing mark as shown in FIG. 7B, it is considered that the temperature of the area A where the laser light overlaps the existing mark becomes higher than that of the area B where the laser light does not overlap. Here, consider the temperature distribution in the cross-sectional direction of the optical recording medium. FIG. 8 is a cross-sectional view of the temperature distribution in the mark area of FIG. 7 (b) taken in the X direction. The recording layer 80 is sandwiched by a first protective layer 81 and a second protective layer 82. Actually, the substrate, the reflection layer, the adhesive, and the protective plate are present, but they are omitted here for simplification. Laser light on recording layer 80
When 83 is irradiated, the recording layer 80 generates heat and the first protective layer 81
The temperature of the second protective layer 82 in the film thickness direction is higher as it is closer to the recording layer 80. Therefore, the first protective layer 81 and the second protective layer 82 thermally expand, but it is considered that the closer to the recording layer 80, the larger the amount of expansion and the more the recording layer 80 is bent. Further, as shown in FIG. 8, when the laser light 83 is applied so as to overlap the existing mark to some extent, the temperature of the area A overlapping the mark becomes higher than that of the area B not overlapping. Therefore, the protective layer close to the area A is further bent toward the recording layer side, the portion of the recording layer 80 melted by the laser beam is pushed out in the direction of the area B, and the recording layer moves. If this phenomenon is repeated over and over again with respect to the already recorded mark several times, the recording layer 80 is moved sequentially, and a film thickness variation or a portion without the recording layer occurs, which makes normal recording impossible. There was a problem.
【０００４】本発明は上記従来の問題を解決するもので
あり、記録層の移動を低減し、多サイクルの書換えが安
定に行える書換型光記録媒体の記録方法を提供すること
を目的とするものである。The present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a recording method for a rewritable optical recording medium which can reduce the movement of the recording layer and can stably perform multicycle rewriting. Is.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために、記録時に既記録マーク以外の位置にマーク
を形成するか、あるいは記録時に既記録マークと実質的
に同位置に形成するか、記録時に既記録マーク以外の位
置および実質的に同位置にマークを形成するかを組み合
わせた記録方法としている。In order to achieve the above object, the present invention forms a mark at a position other than a recorded mark at the time of recording, or forms the mark at substantially the same position as the recorded mark at the time of recording. Alternatively, a recording method is used in which a mark is formed at a position other than the recorded mark and substantially at the same position during recording.
【０００６】[0006]
【作用】したがって本発明によれば、マーク記録時に既
記録マークと重ならないか、実質的に同位置に形成する
ことにより、記録層の物質移動が抑制され、記録層の膜
厚変動や記録層のない部分の発生を抑えることができ、
多サイクルの書換えが安定になる。Therefore, according to the present invention, when the mark is recorded, the mark does not overlap with the already-recorded mark or is formed at substantially the same position, so that the mass transfer of the recording layer is suppressed and the fluctuation of the recording layer thickness and the recording layer are suppressed. It is possible to suppress the occurrence of parts without
Multi-cycle rewriting becomes stable.
【０００７】[0007]
【実施例】図１は本発明の第１の実施例における書換型
光記録媒体のトラック上に記録マークが形成された状態
を示すものであり、図１(a)は光記録媒体上に既に形成
されている記録マーク列を示している。光ディスクの場
合一般に、トラック１に沿って記録マーク２が形成され
る。記録マーク２は、第１の実施例ではこのマークを非
晶質の場合を例にとって説明するが、発明はこれにとわ
れず結晶の状態でも良い。記録マーク２に非晶質状態を
選ぶとそれ以外の領域は結晶状態である。図１(a)のト
ラックに記録マークを書換える場合を図１(b)に示す。
図１(b)において、３は新たに形成した新記録マークで
ある。図１(b)のように新記録マーク３は前に形成され
ていた既記録マーク２に重ならない位置に記録する。こ
の段階で既に形成されていた既記録マーク２は消去さ
れ、この部分は結晶状態になる。図２に図１(b)に示す
トラックの断面を示す。図２において20は記録層であ
り、この記録層20を第１の保護層21と第２の保護層22で
はさんだ構成を示している。23は既に形成されていた既
記録マークであり図１(b)の記録マーク２に対応する。2
4は新たに記録した新記録マークであり、レーザー光25
を照射して形成される。新記録マーク24は図１(b)の新
記録マーク３に対応する。図２に示すように、新記録マ
ーク24は前に記録されていた既記録マーク23に重ならな
いように、特に既記録マーク23の間に形成している。新
記録マーク24は既記録マーク23以外の位置である結晶状
態の領域に形成される。すなわち、同じ吸収率の領域が
加熱されるので、新記録マーク23が形成される領域は、
トラック方向の温度分布の対称性が従来に比べ良くなる
と考えられる。ここで、第１の保護層21と第２の保護層
22は記録層20側が凸になるように変形する。また、トラ
ック方向の温度分布の対称性が良くなると考えられるの
で、この凸状の変形はトラック方向に対象になると考え
られる。よって、記録層20が１方向に片寄って移動する
ことが低減される。さらに、何回もの記録マークの書換
えで既記録マークに幾らか重なって新しい記録マークの
形成が繰り返されると記録はある方向へ順次移動する
が、第１の実施例では既記録マーク23と重ならないに新
記録マーク24を形成するので、記録層20の移動は分断さ
れる。この結果、記録層20の物質移動は低減されるの
で、記録層20の膜厚変動や記録層20のない領域が発生す
ることを防止でき、多数回の書換えが安定に行えるよう
になる。FIG. 1 shows a state in which a recording mark is formed on a track of a rewritable optical recording medium according to the first embodiment of the present invention, and FIG. 1 (a) shows that the recording mark is already formed on the optical recording medium. The formed recording mark row is shown. In the case of an optical disc, the recording mark 2 is generally formed along the track 1. In the first embodiment, the recording mark 2 will be described by exemplifying the case where the recording mark 2 is amorphous, but the invention is not limited to this and may be in a crystalline state. When the amorphous state is selected for the recording mark 2, the other regions are in the crystalline state. FIG. 1B shows a case where the recording mark is rewritten on the track shown in FIG.
In FIG. 1B, 3 is a newly formed new recording mark. As shown in FIG. 1B, the new recording mark 3 is recorded at a position that does not overlap the previously formed recording mark 2. The already-recorded marks 2 already formed at this stage are erased, and this portion becomes a crystalline state. FIG. 2 shows a cross section of the track shown in FIG. In FIG. 2, reference numeral 20 denotes a recording layer, and the recording layer 20 is sandwiched by a first protective layer 21 and a second protective layer 22. Reference numeral 23 denotes an already formed recorded mark, which corresponds to the recorded mark 2 in FIG. 1 (b). 2
4 is a new recording mark newly recorded, laser light 25
It is formed by irradiating. The new recording mark 24 corresponds to the new recording mark 3 in FIG. As shown in FIG. 2, the new recording mark 24 is formed especially between the previously recorded marks 23 so as not to overlap with the previously recorded marks 23 previously recorded. The new recording mark 24 is formed in a crystalline state region other than the already recorded mark 23. That is, since the area having the same absorption rate is heated, the area where the new recording mark 23 is formed is
It is considered that the symmetry of the temperature distribution in the track direction becomes better than that of the conventional one. Here, the first protective layer 21 and the second protective layer
22 is deformed so that the recording layer 20 side is convex. Further, since it is considered that the temperature distribution in the track direction has a good symmetry, it is considered that this convex deformation is targeted in the track direction. Therefore, the recording layer 20 is less likely to move in one direction. Further, when the recording mark is rewritten many times and the new recording mark is repeatedly formed with some overlap with the already recorded mark, the recording sequentially moves in a certain direction, but in the first embodiment, it does not overlap with the already recorded mark 23. Since the new recording mark 24 is formed on the recording layer 20, the movement of the recording layer 20 is divided. As a result, since the mass transfer of the recording layer 20 is reduced, it is possible to prevent the film thickness variation of the recording layer 20 and the region where the recording layer 20 is absent, and it is possible to stably rewrite many times.
【０００８】図３は本発明の第２の実施例における書換
型光記録媒体のトラック上に記録マークが形成された状
態を示すものであり、図３(a)は光記録媒体のトラック
に既に形成されている記録マーク列を示している。光デ
ィスクの場合一般に、トラック31に沿って記録マーク32
が形成される。記録マーク32（32a，32b，32c)は、第２
の実施例ではこのマークを非晶質の場合を例にとって説
明するが、発明はこれにとらわれず結晶の状態でも良
い。記録マーク32に非晶質状態を選ぶとそれ以外の領域
は結晶状態である。図３(a)のトラックに記録マークを
書換えた場合を図３(b)に示す。図３(b)において、33は
新たに形成した新記録マークである。図３(b)にように
新記録マーク33(33a，33b)は、既記録マーク32と同位置
に記録している。この段階で書換えが行われるので、既
記録マーク32bは消去され、再度、既記録マーク32a，32
c上に新記録マーク33a，33bが形成されたことになる。
図４に図３(b)に示すトラックの断面を示す。図４にお
いて40は記録層であり、この記録層40を第１の保護層41
と第２の保護層42ではさんだ構成を示している。43は既
に形成されていた既記録マークであり図３(b)の記録マ
ーク32に対応する。44(44a，44b)は新たに記録した新記
録マークであり、レーザー光45を照射して形成される。
新記録マーク44は図３(b)の新記録マーク33に対応す
る。図４に示すように、新記録マーク44は前に記録され
ていた既記録マーク43と同位置に記録されている。すな
わち、新記録マーク44は既記録マーク43の非晶質の領域
に形成されるので、同じ吸収率の領域が加熱されるの
で、新記録マーク44が記録される領域はトラック方向の
温度分布の対称性が従来に比べ良くなると考えられる。
ここで、第１の保護層41と第２の保護層42は記録層40側
に凸になるように変形する。また、トラック方向の温度
分布の対称性が良くなると考えられるので、この凸状変
形はトラック方向に対称になると考えられる。よって、
記録層40が１方向に片寄って移動することが低減され
る。さらに、何回もの記録マークの書換えで既記録マー
クに幾らか重なって新しい記録マークの形成が繰り返さ
れると記録層はある方向へ順次移動する。しかし、第２
の実施例では既記録マーク43と同位置に新記録マークが
形成されるので記録層40の移動は分断される。その結
果、記録層40の物質移動は低減されるので、記録層40の
膜厚変動や記録層40のない領域を発生することを防止で
き、多数回の書換えが安定に行えるようになる。FIG. 3 shows a state in which a recording mark is formed on the track of the rewritable optical recording medium in the second embodiment of the present invention, and FIG. 3 (a) shows that the track is already formed on the track of the optical recording medium. The formed recording mark row is shown. In the case of an optical disc, the recording mark 32 is generally formed along the track 31
Is formed. The recording mark 32 (32a, 32b, 32c) is the second
In the embodiment, the case where the mark is amorphous will be described as an example, but the invention is not limited to this and the state may be a crystalline state. When the amorphous state is selected for the recording mark 32, the other regions are in the crystalline state. FIG. 3B shows a case where the recording mark is rewritten on the track shown in FIG. In FIG. 3B, 33 is a newly formed new recording mark. As shown in FIG. 3B, the new recording mark 33 (33a, 33b) is recorded at the same position as the already recorded mark 32. Since rewriting is performed at this stage, the recorded mark 32b is erased, and the recorded marks 32a and 32a are recorded again.
The new recording marks 33a and 33b are formed on c.
FIG. 4 shows a cross section of the track shown in FIG. In FIG. 4, reference numeral 40 denotes a recording layer, and this recording layer 40 is the first protective layer 41.
The second protective layer 42 has a sandwiched structure. Reference numeral 43 denotes an already formed recording mark, which corresponds to the recording mark 32 shown in FIG. 44 (44a, 44b) is a new recording mark newly recorded and is formed by irradiating the laser beam 45.
The new recording mark 44 corresponds to the new recording mark 33 in FIG. As shown in FIG. 4, the new recording mark 44 is recorded at the same position as the previously recorded mark 43 previously recorded. That is, since the new recording mark 44 is formed in the amorphous region of the already-recorded mark 43, the region having the same absorptivity is heated, so that the region where the new recording mark 44 is recorded has a temperature distribution in the track direction. It is believed that the symmetry will be better than before.
Here, the first protective layer 41 and the second protective layer 42 are deformed so as to be convex toward the recording layer 40 side. Further, since it is considered that the temperature distribution in the track direction is more symmetrical, this convex deformation is considered to be symmetrical in the track direction. Therefore,
Movement of the recording layer 40 in one direction is reduced. Furthermore, when the recording mark is rewritten many times and a new recording mark is repeatedly formed with some overlap with the already recorded mark, the recording layer sequentially moves in a certain direction. But the second
In this embodiment, since the new recording mark is formed at the same position as the already recorded mark 43, the movement of the recording layer 40 is divided. As a result, since the mass transfer of the recording layer 40 is reduced, it is possible to prevent the film thickness variation of the recording layer 40 and the generation of the region where the recording layer 40 is absent, and it is possible to stably rewrite many times.
【０００９】図５は本発明の第３の実施例における書換
型光記録媒体のトラック上に記録マークが形成された状
態を示すものであり、図５(a)は光記録媒体上に既に形
成されている記録マーク列を示している。光ディスクの
場合一般に、トラック51に沿って既記録マーク52(52a，
52b)が形成される。記録マーク52は第３の実施例ではこ
のマークを非晶質の場合を例にとって説明するが、発明
はこれにとらわれず結晶でも良い。記録マーク52に非晶
質状態を選ぶとそれ以外の領域は結晶状態である。図５
(a)のトラック51に記録マークを書換える場合を図５(b)
に示す。図５(b)において、53(53a，53b，53c)に新たに
形成した新記録マークである。図５(b)のように新記録
マーク53は前に形成されていた既記録マーク52に重なら
ない位置および既記録マーク52はと同位置に形成する。
新記録マーク53は既記録マーク52の非晶質の領域および
結晶の領域を形成されるので、同じ吸収率の領域が加熱
され、新記録マーク53が記録される領域はトラック方向
の温度分布の対称性が従来に比べ良くなると考えられ
る。それ故、第１の実施例，第２の実施例と同様に保護
層の凸状変形はトラック方向に対称になると考えられ
る。よって、記録層が１方向に片寄って移動することが
低減される。さらに、何回もの記録マークの書換えで既
記録マークに幾らか重なって新しい記録マークの形成が
繰り返されると記録層はある方向へ順次移動する。しか
し、第３の実施例では既記録マーク52と同位置および重
ならない位置に新記録マークが形成されるので記録層の
物質移動は分断される。その結果、記録層の膜厚変動や
記録層のない領域が発生することを防止でき、多数回の
書換えが安定に行えるようになる。FIG. 5 shows a state in which recording marks are formed on the tracks of the rewritable optical recording medium in the third embodiment of the present invention, and FIG. 5 (a) shows that the recording marks have already been formed on the optical recording medium. The recorded mark row is shown. In the case of an optical disc, the recorded marks 52 (52a, 52a,
52b) is formed. The recording mark 52 will be described in the third embodiment by taking the case where the mark is amorphous as an example, but the invention is not limited to this and may be a crystal. When the amorphous state is selected for the recording mark 52, the other regions are in the crystalline state. Figure 5
Figure 5 (b) shows the case of rewriting the recording mark on track 51 in (a).
Shown in. In FIG. 5B, it is a new recording mark newly formed on 53 (53a, 53b, 53c). As shown in FIG. 5B, the new recording mark 53 is formed at a position where it does not overlap with the previously recorded mark 52 and at the same position as the already recorded mark 52.
Since the new recording mark 53 forms an amorphous region and a crystalline region of the already recorded mark 52, the region having the same absorptance is heated, and the region where the new recording mark 53 is recorded has a temperature distribution in the track direction. It is believed that the symmetry will be better than before. Therefore, it is considered that the convex deformation of the protective layer becomes symmetrical in the track direction, as in the first and second embodiments. Therefore, it is possible to reduce the displacement of the recording layer in one direction. Further, when the recording mark is rewritten many times and a new recording mark is repeatedly overlapped with the existing recording mark, the recording layer is sequentially moved in a certain direction. However, in the third embodiment, the new recording mark is formed at the same position as the already-recorded mark 52 and at a position not overlapping with it, so that the mass transfer of the recording layer is divided. As a result, it is possible to prevent the film thickness of the recording layer from varying and the region without the recording layer from occurring, and it is possible to stably rewrite many times.
【００１０】[0010]
【発明の効果】以上のように本発明によれば、記録時に
既記録マーク以外の位置にマークを形成するか、あるい
は記録時に既記録マークと実質的に同位置にマークを形
成する、または記録時に既記録マーク以外の位置および
実質的に同位置にマークを形成することで、記録層の物
質移動が抑制され、記録層の膜厚変動や記録層のない部
分の発生を抑えることができ、その結果、多サイクルの
書換えが安定になるという効果を有する。As described above, according to the present invention, a mark is formed at a position other than a recorded mark during recording, or a mark is formed at substantially the same position as a recorded mark during recording, or recording is performed. By forming marks at positions other than the already-recorded marks and at substantially the same positions at times, mass transfer of the recording layer is suppressed, and it is possible to suppress fluctuations in the thickness of the recording layer and the occurrence of portions without the recording layer. As a result, there is an effect that multi-cycle rewriting becomes stable.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の第１実施例における書換型光記録媒体
の記録方法を示した平面図である。FIG. 1 is a plan view showing a recording method of a rewritable optical recording medium according to a first embodiment of the invention.
【図２】本発明の第１実施例における書換型光記録媒体
の記録方法を示したディスクの断面図である。FIG. 2 is a sectional view of a disk showing a recording method of a rewritable optical recording medium in a first embodiment of the present invention.
【図３】本発明の第２実施例における書換型光記録媒体
の記録方法を示した平面図である。FIG. 3 is a plan view showing a recording method of a rewritable optical recording medium according to a second embodiment of the invention.
【図４】本発明の第２実施例における書換型光記録媒体
の記録方法を示したディスクの断面図である。FIG. 4 is a sectional view of a disk showing a recording method of a rewritable optical recording medium in a second embodiment of the present invention.
【図５】本発明の第３実施例における書換型光記録媒体
の記録方法を示した平面図である。FIG. 5 is a plan view showing a recording method of a rewritable optical recording medium according to a third embodiment of the invention.
【図６】一般的な書換型光記録媒体を示す断面図であ
る。FIG. 6 is a cross-sectional view showing a general rewritable optical recording medium.
【図７】従来の書換型光記録媒体の記録方法を示した平
面図である。FIG. 7 is a plan view showing a recording method of a conventional rewritable optical recording medium.
【図８】従来の書換型光記録媒体の記録方法を示したデ
ィスクの断面図である。FIG. 8 is a sectional view of a disk showing a recording method of a conventional rewritable optical recording medium.
１，31，51…トラック、 ２，32a，32b，32c…記録マ
ーク、 ３，24，33a，33b，44a，44b，53a，53b，53c
…新記録マーク、 20，40，63，80…記録層、21，41，
81…第１の保護層、 22，42，82…第２の保護層、 2
3，43，52a，52b…既記録マーク、 25，45，83…レー
ザー光、 61…基板、 62，64…保護層、 65…反射
層、 66…接着剤、 67…保護板。1, 31, 51 ... Tracks, 2, 32a, 32b, 32c ... Recording marks, 3, 24, 33a, 33b, 44a, 44b, 53a, 53b, 53c
… New recording marks, 20, 40, 63, 80… Recording layers, 21, 41,
81 ... First protective layer, 22, 42, 82 ... Second protective layer, 2
3, 43, 52a, 52b ... Recorded marks, 25, 45, 83 ... Laser light, 61 ... Substrate, 62, 64 ... Protective layer, 65 ... Reflective layer, 66 ... Adhesive, 67 ... Protective plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 秋山 哲也 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Akiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (3)
ークを形成することを特徴する書換型光記録媒体の記録
方法。1. A recording method for a rewritable optical recording medium, which comprises forming marks at positions other than already recorded marks during recording.
置にマークを形成することを特徴する書換型光記録媒体
の記録方法。2. A recording method for a rewritable optical recording medium, wherein a mark is formed at substantially the same position as a recorded mark at the time of recording.
実質的に同位置にマークを形成することを特徴する書換
型光記録媒体の記録方法。3. A recording method for a rewritable optical recording medium, which comprises forming marks at the positions of already recorded marks and at substantially the same positions during recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31651791A JPH05151571A (en) | 1991-11-29 | 1991-11-29 | Recording method for rewritable optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31651791A JPH05151571A (en) | 1991-11-29 | 1991-11-29 | Recording method for rewritable optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05151571A true JPH05151571A (en) | 1993-06-18 |
Family
ID=18077993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31651791A Pending JPH05151571A (en) | 1991-11-29 | 1991-11-29 | Recording method for rewritable optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05151571A (en) |
Cited By (2)
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|---|---|---|---|---|
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| US8233375B2 (en) | 2006-03-03 | 2012-07-31 | Sharp Kabushiki Kaisha | Optical information recording medium, reproducing device for optical information recording medium, control method and control program for the reproducing device, and medium with the control program recorded therein |
-
1991
- 1991-11-29 JP JP31651791A patent/JPH05151571A/en active Pending
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| US8233375B2 (en) | 2006-03-03 | 2012-07-31 | Sharp Kabushiki Kaisha | Optical information recording medium, reproducing device for optical information recording medium, control method and control program for the reproducing device, and medium with the control program recorded therein |
| US8355304B2 (en) | 2006-03-03 | 2013-01-15 | Sharp Kabushiki Kaisha | Optical information recording medium, reproducing device for optical information recording medium, control method and control program for the reproducing device, and medium with the control program recorded therein |
| US8400903B2 (en) | 2006-03-03 | 2013-03-19 | Sharp Kabushiki Kaisha | Optical information recording medium, reproducing device for optical information recording medium, control method and control program for the reproducing device, and medium with the control program recorded therein |
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| US8223620B2 (en) | 2007-08-30 | 2012-07-17 | Sharp Kabushiki Kaisha | Super-resolution optical recording medium on which information is recorded using train of prepits, optical recording medium reproduction device, and control method |
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| US8867328B2 (en) | 2007-08-30 | 2014-10-21 | Sharp Kabushiki Kaisha | Optical recording medium on which information is recorded using train of prepits, and method for reproducing optical recording medium |
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