JPH05294069A - Optical data recording device and medium - Google Patents

Optical data recording device and medium

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Publication number
JPH05294069A
JPH05294069A JP4102914A JP10291492A JPH05294069A JP H05294069 A JPH05294069 A JP H05294069A JP 4102914 A JP4102914 A JP 4102914A JP 10291492 A JP10291492 A JP 10291492A JP H05294069 A JPH05294069 A JP H05294069A
Authority
JP
Japan
Prior art keywords
recording layer
recording
substrate
layer
atomic
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
Application number
JP4102914A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Kageyama
喜之 影山
Yukio Ide
由紀雄 井手
Masato Harigai
眞人 針谷
Hiroko Iwasaki
博子 岩崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP4102914A priority Critical patent/JPH05294069A/en
Publication of JPH05294069A publication Critical patent/JPH05294069A/en
Pending legal-status Critical Current

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  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PURPOSE:To obtain an optical data recording medium excellent in erasure ratio characteristics and repeating characteristics by melting a recording layer under a laser beam irradiating condition and changing reflectivity by the diffusion and segregation of Ag at the time of coagulation to perform recording and erasure. CONSTITUTION:A recording layer is formed on a substrate. The recording layer contains at least Ag and is represented by AgX(MYQ100-Y)100-X (wherein x and y are 40<=X<=70 and 50<=Y<=80 on an atomic % basis, M is a calcogen element and Q is group IVb elements) or AgX(MYL100-Y)100-X (wherein x and y are 40<=X<=70 and 60<=Y<=90 on an atomic % basis, M is a calcogen element and L is group IIb elements). By using the recording layer and a nitrogen compd. protective layer in combination, the recording layer is melted under a laser beam irradiating condition and reflectivity is changed at the time of coagulation by the diffusion and segregation of Ag to perform recording and erasure. By this constitution, an optical data recording medium having a high C/N ratio and excellent in repeating characteristics can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は光情報記録媒体に関し、
光ビームを照射することにより記録層材料に反射率変化
を生じさせ、情報の記録、再生を行い、かつ書換が可能
である情報記録媒体、特に書換え可能なコンパクトディ
スクに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium,
The present invention relates to an information recording medium capable of recording / reproducing information and rewriting by changing the reflectance of a recording layer material by irradiating a light beam, and particularly to a rewritable compact disc.

【0002】[0002]

【従来の技術】電磁波、特にレーザービームの照射によ
る情報の記録、再生および消去可能な光メモリー媒体の
一つとして、結晶−非晶質相間、あるいは結晶−結晶相
間の転移を利用する、いわゆる相変化形記録媒体がよく
知られている。特に光磁気メモリーでは困難な単一ビー
ムによるオーバーライトが可能であり、ドライブ側の光
学系もより単純であることなどから、最近その研究開発
が活発になっている。その代表的な例として、USP3
530441に開示されているように、Ge−Te,G
e−Te−Sb−S,Ge−Te−S,Ge−Se−
S,Ge−Se−Sb,Ge−As−Se,In−T
e,Se−Te,Se−Asなどのいわゆるカルコゲン
系合金材料があげられる。また安定性、高速結晶化など
の向上を目的に、Ge−Te系にAu(特開昭61−2
19692)、Sn及びAu(特開昭61−27019
0)、Pd(特開昭62−19490)などを添加した
材料の提案や、記録/消去の繰り返し性能向上を目的に
Ge−Te−Se−Sb,Ge−Te−Sbの組成比を
特定した材料(特開昭62−73438)の提案なども
なされている。しかしながら、そのいずれもが相変化形
書換可能光メモリー媒体として要求される諸特性のすべ
てを満足しうるものとはいえない。
2. Description of the Related Art As one of optical memory media capable of recording, reproducing and erasing information by irradiation of electromagnetic waves, especially laser beams, so-called phase utilizing a transition between crystal-amorphous phase or crystal-crystal phase. Variant recording media are well known. In particular, since it is possible to overwrite with a single beam, which is difficult for a magneto-optical memory, and the optical system on the drive side is simpler, research and development has recently become active. As a typical example, USP3
Ge-Te, G, as disclosed in 530441.
e-Te-Sb-S, Ge-Te-S, Ge-Se-
S, Ge-Se-Sb, Ge-As-Se, In-T
Examples include so-called chalcogen-based alloy materials such as e, Se-Te, and Se-As. Further, for the purpose of improving stability, high-speed crystallization, etc., a Ge--Te system containing Au (JP-A-61-2
19692), Sn and Au (JP-A-61-27019).
0), Pd (JP-A-62-19490) and the like, and the composition ratio of Ge-Te-Se-Sb and Ge-Te-Sb was specified for the purpose of improving the recording / erasing repetition performance. Proposals for materials (JP-A-62-73438) have also been made. However, none of them can satisfy all the characteristics required for the phase-change rewritable optical memory medium.

【0003】又、特開昭63−251290では結晶状
態が実質的に三元以上の多元化合物単相からなる記録層
を形成した光情報記録媒体(以降「光記録媒体」と略記
する)が提案されている。ここで「実質的に三元以上の
多元化合物単層」とは三元以上の化学量論組成を持った
化合物(たとえばIn3SbTe2など)を記録層中に9
0原子%以上含むものとされている。このような記録層
を用いることにより高速記録、高速消去が可能となると
している。しかしながらこのものでは記録、消去に要す
るレーザーパワーが未だ十分ではなく、消去比も低い
(消し残りが大きい)などの欠点を有している。
Further, Japanese Patent Laid-Open No. 63-251290 proposes an optical information recording medium (hereinafter abbreviated as "optical recording medium") having a recording layer formed of a multi-component compound single phase whose crystal state is substantially ternary or more. Has been done. Here, “substantially ternary or higher multi-component compound monolayer” means that a compound having a stoichiometric composition of ternary or higher (for example, In 3 SbTe 2 ) is used in the recording layer.
It is supposed to contain 0 atomic% or more. It is said that high-speed recording and high-speed erasing can be performed by using such a recording layer. However, this method has drawbacks such that the laser power required for recording and erasing is not yet sufficient, and the erasing ratio is low (erasure remaining is large).

【0004】更に特開平1−277338号公報には
(SbaTe1-a1-YY(ここで0.4≦a<0.7,
Y≦0.2であり、MはAg,Al,As,Au,B
i,Cu,Ga,Ge,In,Pb,Pt,Se,S
i,Sn及びZnからなる群から選ばれる少なくとも1
種である)で表わされる組成の合金からなる記録層を有
する光記録媒体が提案されている。この系の基本はBb
2Te3であり、Sb過剰にすることにより、高速消去、
繰返し特性を向上させ、Mの添加により高速消去を促進
させている。加えてDC光による消去率も大きいとして
いる。しかし、この文献にはオーバーライト時の消去率
は示されておらず(本発明者らの検討結果では消し残り
が認められた)、記録感度も不十分である。
[0004] Further in JP-A-1-277338 (Sb a Te 1-a ) 1-Y M Y ( wherein 0.4 ≦ a <0.7,
Y ≦ 0.2, M is Ag, Al, As, Au, B
i, Cu, Ga, Ge, In, Pb, Pt, Se, S
at least 1 selected from the group consisting of i, Sn and Zn
The optical recording medium having a recording layer made of an alloy having a composition represented by (1) is proposed. The basis of this system is Bb
2 Te 3 and high-speed erasing by making Sb excessive
The repetition characteristics are improved, and the addition of M promotes high-speed erasing. In addition, the erasing rate by DC light is also high. However, this document does not show the erasing rate at the time of overwriting (the results of the study by the present inventors showed the unerased portion), and the recording sensitivity is insufficient.

【0005】同様に特開昭60−177446号公報で
は記録層に(In1-XSbX1-YY(0.55≦X≦
0.80,0≦Y≦0.20であり、MはAu,Ag,
Cu,Pd,Pt,Al,Si,Ge,Ga,Sn,T
e,Se,Biである)なる合金を用い、また、特開昭
63−228433号公報では記録層にGeTe−Sb
2Te3−Sb(過剰)なる合金を用いているが、いずれ
も感度、消去比等の特性を満足するものではない。
Similarly, in JP-A-60-177446, (In 1-X Sb X ) 1-Y M Y (0.55≤X≤
0.80,0 ≦ Y ≦ 0.20, and M is Au, Ag,
Cu, Pd, Pt, Al, Si, Ge, Ga, Sn, T
e, Se, Bi), and GeTe-Sb is used as the recording layer in JP-A-63-228433.
Although an alloy of 2 Te 3 -Sb (excess) is used, none of them satisfies the characteristics such as sensitivity and erase ratio.

【0006】これまでみてきたように、光記録媒体にお
いては、特に記録感度、消去感度の向上、オーバーライ
ト時の消し残りによる消去比低下の防止、並びに記録
部、未記録部の長寿命化が解決すべき最重要課題となっ
ている。
As has been seen so far, in the optical recording medium, in particular, the recording sensitivity and the erasing sensitivity are improved, the reduction of the erasing ratio due to the unerased portion at the time of overwriting is prevented, and the life of the recorded portion and the unrecorded portion is extended. It is the most important issue to be solved.

【0007】一方、書換え可能コンパクトディスクに関
しては、Ge−Sb−Te系で開発が進められている
が、反射率が約30%と低く、現状のコンパクトディス
クドライブで再生することができないものとなってい
る。
On the other hand, the rewritable compact disc is being developed in the Ge-Sb-Te system, but the reflectance is as low as about 30% and it cannot be reproduced by the present compact disc drive. ing.

【0008】[0008]

【発明が解決しようとする課題】本発明は上記のような
欠点、不都合を解消し、良質の光情報記録媒体を提供す
るものである。
SUMMARY OF THE INVENTION The present invention solves the above drawbacks and inconveniences and provides a high quality optical information recording medium.

【0009】[0009]

【課題を解決するための手段】本発明は記録層が少なく
ともAgを含み、光ビームの照射条件により、溶融凝固
する際にAgの拡散、偏析をおこさせることにより反射
率変化をおこさせて記録、消去を行うことを特徴として
いる。
According to the present invention, the recording layer contains at least Ag, and the reflectance is changed by causing diffusion and segregation of Ag during melting and solidification depending on irradiation conditions of a light beam. It is characterized by erasing.

【0010】本発明者らは記録材料として前記のような
ものを用いれば前記課題を達成しうることを確かめた。
本発明はそれによりなされたものである。
The present inventors have confirmed that the above object can be achieved by using the above-mentioned recording material.
The present invention has been made thereby.

【0011】本発明をさらに詳細に説明すると、本発明
に係る記録層は少なくともAgを含み、好適には AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 50≦Y≦80 Mはカルコゲン元素、QはIVb族元素、あるいは AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 60≦Y≦90 Mはカルコゲン元素、LはIIb族元素、であらわされる
ものである。
The present invention will be described in more detail. The recording layer according to the present invention contains at least Ag, and preferably Ag X ( MY Q 100-Y ) 100-X X, Y is 40% or less in atomic%. ≦ 70 50 ≦ Y ≦ 80 M is a chalcogen element, Q is an IVb group element, or Ag X ( MY L 100-Y ) 100-X X and Y are atomic% 40 ≦ X ≦ 70 60 ≦ Y ≦ 90 M Is a chalcogen element, and L is a IIb group element.

【0012】また本発明に係る保護層はAlN、SiN
等の窒素化合物である。前記記録層と窒素化合物保護層
を組合せて用いることにより、反射率が60%から70
%で、C/Nが高く、繰返し特性に優れた光情報記録媒
体、特に書換え可能コンパクトディスクを得ることがで
きる。
The protective layer according to the present invention is made of AlN, SiN.
And nitrogen compounds. By using the recording layer and the nitrogen compound protective layer in combination, the reflectance is 60% to 70%.
%, It is possible to obtain an optical information recording medium having a high C / N and an excellent repeatability, particularly a rewritable compact disc.

【0013】高い反射率が得られる理由は記録層が光ビ
ームの照射により、溶融、凝固する際にAgの拡散、偏
析が生じ、低パワー照射部領域の方が高パワー照射部領
域に比べ、Ag濃度が増加するためである。したがって
記録層中のAgの組成比が低下してくると反射率の低下
が生じるためAgは40%以上は必要である。一方、組
成比が70%以上になると十分なC/Nが得られなくな
る。またカルコゲン元素とGe等のIVb族元素あるいは
Zn等のIIb族元素との比は繰返し特性に影響し、IVb
族元素の場合50%から80%、IIb族元素では60%
から90%のカルコゲン元素が必要となる。
The reason why a high reflectance is obtained is that when the recording layer is irradiated with a light beam, Ag is diffused and segregated when the recording layer is melted and solidified, and the low power irradiation area is higher than the high power irradiation area. This is because the Ag concentration increases. Therefore, when the composition ratio of Ag in the recording layer is lowered, the reflectance is lowered, so Ag is required to be 40% or more. On the other hand, when the composition ratio is 70% or more, sufficient C / N cannot be obtained. Further, the ratio of the chalcogen element to the IVb group element such as Ge or the IIb group element such as Zn has an influence on the repeating characteristics.
50% to 80% for group elements, 60% for IIb elements
To 90% of the chalcogen element is required.

【0014】また保護層材料として前記窒化物の代わり
に酸化物層を用いると繰返し特性の低下が生じる。
Further, if an oxide layer is used as the protective layer material instead of the above-mentioned nitride, the repeated characteristics are deteriorated.

【0015】記録層の膜厚は100〜3000Å、好適
には200〜1000Åとするのがよい。一方、保護層
の膜厚は200〜5000、好適には500〜3000
Åとするのがよい。これらの層はスパッタリング、蒸着
などの薄膜製膜法によって基板上に製膜される。
The thickness of the recording layer is 100 to 3000Å, preferably 200 to 1000Å. On the other hand, the thickness of the protective layer is 200 to 5000, preferably 500 to 3000.
It is good to say Å. These layers are formed on the substrate by a thin film forming method such as sputtering or vapor deposition.

【0016】本発明で用いられる基板は通常ガラス、セ
ラミックス、あるいは樹脂であり、樹脂基板が成形性、
コストの点で好適である。樹脂の代表例としてはポリカ
ーボネート樹脂、アクリル樹脂、エポキシ樹脂、ポリス
チレン樹脂、アクリロニトリル−スチレン共重合体樹
脂、ポリエチレン樹脂、ポリプロピレン樹脂、シリコン
系樹脂、フッ素系樹脂、ABS樹脂、ウレタン樹脂など
があげられるが、加工性、光学特性などの点でポリカー
ボネート樹脂、アクリル系樹脂が好ましい。また基板の
形状としてはディスク状、カード状あるいはシート状で
あってもよい。
The substrate used in the present invention is usually glass, ceramics, or resin.
It is preferable in terms of cost. Typical examples of the resin include polycarbonate resin, acrylic resin, epoxy resin, polystyrene resin, acrylonitrile-styrene copolymer resin, polyethylene resin, polypropylene resin, silicon resin, fluorine resin, ABS resin and urethane resin. Polycarbonate resin and acrylic resin are preferable in terms of processability and optical characteristics. The shape of the substrate may be disk-shaped, card-shaped or sheet-shaped.

【0017】記録、再生および消去に用いる電磁波とし
てはレーザー光、電子線、X線、紫外線、可視光線、赤
外線、マイクロ波など種々のものが採用可能であるが、
ドライブに取付ける際、小型でコンパクトな半導体レー
ザーが最適である。
As the electromagnetic wave used for recording, reproducing and erasing, various kinds such as laser light, electron beam, X-ray, ultraviolet ray, visible ray, infrared ray and microwave can be adopted.
When mounted in a drive, a small and compact laser diode is the best choice.

【0018】[0018]

【実施例】以下、実施例によって本発明を具体的に説明
する。但しこれらの実施例は本発明をなんら制限するも
のではない。
EXAMPLES The present invention will be specifically described below with reference to examples. However, these examples do not limit the present invention.

【0019】実施例1 ピッチ約1.6μm、深さ約700Åの溝付きで、厚さ
1.2mmの86mmφのポリカーボネート基板上にr
fスパッタリング法により下部(基板側)耐熱保護層、
記録層、上部耐熱保護層、反射層を順次積層し、評価用
光ディスクを作製した。
Example 1 On a polycarbonate substrate of 86 mmφ having a pitch of about 1.6 μm and a depth of about 700 Å and a thickness of 1.2 mm, a r substrate was used.
f Lower (substrate side) heat-resistant protective layer by sputtering method,
A recording layer, an upper heat-resistant protective layer, and a reflective layer were sequentially laminated to produce an evaluation optical disc.

【0020】記録層はAgX(Te60Ge40100-Xであ
らわされる組成とした。ターゲット組成を変えて、膜中
組成としてX=30〜90の範囲のディスクを作成し
た。
The recording layer had a composition represented by Ag X (Te 60 Ge 40 ) 100-X . By changing the target composition, a disk having a composition in the range of X = 30 to 90 was prepared.

【0021】下部保護層としてSiO2(約2000
Å)とSi34(約2000Å)、上部保護層としてS
iO2(約1000Å)とSi34(約1000Å)、
反射層としてAl(約500Å)を使用した。
As a lower protective layer, SiO 2 (about 2000
Å) and Si 3 N 4 (about 2000 Å), S as the upper protective layer
iO 2 (about 1000Å) and Si 3 N 4 (about 1000Å),
Al (about 500 Å) was used as the reflective layer.

【0022】光デイスクの評価は830nmの半導体レ
ーザー光をNA0.5のレンズを通して記録層面で、約
1μmφのスポット径にしぼり込み、基板側から照射す
ることにより行った。ディスクの線速度は1.3m/s
ecとした。周波数720kHz、200kHzのオー
バーライトで評価した。
The optical disk was evaluated by irradiating a semiconductor laser beam of 830 nm through a lens of NA 0.5 on the recording layer surface to a spot diameter of about 1 μmφ and irradiating from the substrate side. The linear velocity of the disk is 1.3m / s
ec. Evaluation was performed by overwriting at frequencies of 720 kHz and 200 kHz.

【0023】図1にAgの組成比と反射率、C/Nの関
係を示す。Agの組成比が40%より小さくなると反射
率が急激に低下する。また70%を越えるとC/Nが低
下する。
FIG. 1 shows the relationship between the Ag composition ratio, the reflectance, and the C / N ratio. When the composition ratio of Ag is less than 40%, the reflectance sharply decreases. Further, if it exceeds 70%, the C / N decreases.

【0024】図2はAgの組成比を55%に固定しGe
に対するTeの比をY=40〜90の範囲で変えた場合
の繰返し特性の変化を示している。繰返し特性は消去比
の低下が10dBになる回数で示している。保護層とし
てSiO2を用いた場合とSi34を用いた場合を比較
で示した。SiO2を用いた場合、Teの組成比によら
ず、繰返し特性が悪い。Si34を用いたディスクでは
Yが50より小さいかあるいは80を越えると繰返し特
性が低下する。
In FIG. 2, the composition ratio of Ag is fixed at 55% and Ge is
9 shows the change in the repeating characteristics when the ratio of Te to Y is changed in the range of Y = 40 to 90. The repetition characteristics are shown by the number of times that the reduction of the erase ratio becomes 10 dB. A comparison is made between the case where SiO 2 is used as the protective layer and the case where Si 3 N 4 is used. When SiO 2 is used, the repeatability is poor regardless of the composition ratio of Te. In the case of a disk using Si 3 N 4 , if Y is less than 50 or exceeds 80, the repeating characteristics deteriorate.

【0025】実施例2 実施例1と同様にして記録層がAgX(TeY
100-Y100-Xの場合についてディスク特性を評価し
た。
Example 2 The recording layer was Ag X (Te Y Z) in the same manner as in Example 1.
n 100-Y ) The disk characteristics were evaluated for 100-X .

【0026】図3はAgX(Te70Zn30100-Xについ
てAgの組成比と反射率、C/Nの関係を示している。
Agの組成比が40%より小さくなると反射率が低下す
る。70%を越えるとC/Nの低下がおこっている。
FIG. 3 shows the relationship between the composition ratio of Ag, reflectance and C / N for Ag X (Te 70 Zn 30 ) 100-X .
When the composition ratio of Ag is less than 40%, the reflectance decreases. If it exceeds 70%, the C / N is lowered.

【0027】図4はAgの組成比を55%に固定してZ
nに対するTeの比をY=40〜100の範囲で変えた
場合の繰返し特性の変化を示している。実施例1と同様
にSiO2を用いた場合には繰返し特性は悪い。Si3
4を用いたディスクではY=60〜90の範囲で良好な
特性を示している。
FIG. 4 shows that the composition ratio of Ag is fixed at 55% and Z
It shows a change in repetitive characteristics when the ratio of Te to n is changed in the range of Y = 40 to 100. When SiO 2 is used as in Example 1, the repetitive characteristics are poor. Si 3 N
The disk using 4 shows good characteristics in the range of Y = 60 to 90.

【0028】実施例1および2で作製したディスクにつ
いて記録層のマーク部、マーク間の組成分析をおこなっ
たところ、どのディスクに関してもマーク部のAg濃度
はマーク間のAg濃度に比べ、著しく低下していること
が確認された。これらのディスクの反射率は各部のAg
濃度におおむね対応しており、Agの拡散、偏析が記
録、消去の原因となっていることを裏付けている。
When the composition of the marks in the recording layer and the composition between the marks of the discs manufactured in Examples 1 and 2 were analyzed, the Ag concentration in the marks of all the discs was significantly lower than the Ag concentration between the marks. Was confirmed. The reflectance of these disks is Ag of each part.
It is generally compatible with the density, demonstrating that Ag diffusion and segregation cause recording and erasing.

【0029】[0029]

【発明の効果】以上説明したように本発明によればC/
Nが高く、繰返し特性に優れた光情報記録媒体を得るこ
とができる。
As described above, according to the present invention, C /
It is possible to obtain an optical information recording medium having high N and excellent repeatability.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例1に示した光情報記録媒体のAgの組成
比と反射率、C/Nとの関係を示すグラフ。
FIG. 1 is a graph showing the relationship between the Ag composition ratio, reflectance, and C / N of the optical information recording medium shown in Example 1.

【図2】同光情報記録媒体のGeに対するTeの組成Y
と繰返し回数との関係を示すグラフ。
FIG. 2 is a composition Y of Te with respect to Ge in the optical information recording medium.
And a graph showing the relationship between the number of repetitions.

【図3】実施例2に示した光情報記録媒体のAgの組成
比と反射率、C/Nの関係を示すグラフ。
FIG. 3 is a graph showing the relationship between Ag composition ratio, reflectance, and C / N of the optical information recording medium shown in Example 2.

【図4】同光情報記録媒体のZnに対するTeの組成
(Y)と繰返し回数との関係を示すグラフ。
FIG. 4 is a graph showing the relationship between the composition (Y) of Te with respect to Zn and the number of repetitions of the optical information recording medium.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 岩崎 博子 東京都大田区中馬込1丁目3番6号 株式 会社リコー内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroko Iwasaki 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 基板上に記録層が形成されており、その
記録層が少なくともAgを含み、光ビームの照射条件に
より記録層を溶融し、凝固時のAgの拡散、偏析により
反射率変化をおこさせて記録、消去をおこなうことを特
徴とする情報記録方式。
1. A recording layer is formed on a substrate, and the recording layer contains at least Ag. The recording layer is melted under the irradiation condition of a light beam, and the reflectance change due to Ag diffusion and segregation during solidification. An information recording method characterized in that recording and erasing are performed by causing it to occur.
【請求項2】 基板上に記録層が形成されており、その
記録層が AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 50≦Y≦80 Mはカルコゲン元素、QはIVb族元素、であらわされる
ことを特徴とする光情報記録媒体。
2. A recording layer is formed on a substrate, and the recording layer is Ag X (M Y Q 100-Y ) 100-X X, Y is atomic% 40 ≦ X ≦ 70 50 ≦ Y ≦ 80 An optical information recording medium characterized in that M is a chalcogen element and Q is a group IVb element.
【請求項3】 基板上に記録層が形成されており、その
記録層が AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 60≦Y≦90 Mはカルコゲン元素、LはIIb族元素、であらわされる
ことを特徴とする光情報記録媒体。
3. A recording layer is formed on a substrate, and the recording layer is Ag X (M Y L 100-Y ) 100-X X, Y is atomic% 40 ≦ X ≦ 70 60 ≦ Y ≦ 90 An optical information recording medium, wherein M is a chalcogen element and L is a IIb group element.
【請求項4】 基板上に記録層が形成されており、その
記録層が AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 50≦Y≦80 Mはカルコゲン元素、QはIVb族元素、であらわされ、
前記基板と前記記録層との間及び/又は前記記録層の上
に設けられた保護層が窒素化合物であることを特徴とす
る光情報記録媒体。
4. A recording layer is formed on a substrate, and the recording layer is Ag X (M Y Q 100-Y ) 100-X X, Y is atomic% 40 ≦ X ≦ 70 50 ≦ Y ≦ 80 M is a chalcogen element, Q is a group IVb element,
An optical information recording medium, wherein a protective layer provided between the substrate and the recording layer and / or on the recording layer is a nitrogen compound.
【請求項5】 基板上に記録層が形成されており、その
記録層が AgX(MY100-Y100-X X,Yは原子%で 40≦X≦70 60≦Y≦90 Mはカルコゲン元素、LはIIb族元素、であらわされ、
前記基板と前記記録層との間及び/又は前記記録層の上
に設けられた保護層が窒素化合物であることを特徴とす
る光情報記録媒体。
5. A recording layer is formed on a substrate, and the recording layer is Ag X (M Y L 100-Y ) 100-X X, Y is atomic% 40 ≦ X ≦ 70 60 ≦ Y ≦ 90 M is a chalcogen element, L is a IIb group element,
An optical information recording medium, wherein a protective layer provided between the substrate and the recording layer and / or on the recording layer is a nitrogen compound.
JP4102914A 1992-04-22 1992-04-22 Optical data recording device and medium Pending JPH05294069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4102914A JPH05294069A (en) 1992-04-22 1992-04-22 Optical data recording device and medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4102914A JPH05294069A (en) 1992-04-22 1992-04-22 Optical data recording device and medium

Publications (1)

Publication Number Publication Date
JPH05294069A true JPH05294069A (en) 1993-11-09

Family

ID=14340128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4102914A Pending JPH05294069A (en) 1992-04-22 1992-04-22 Optical data recording device and medium

Country Status (1)

Country Link
JP (1) JPH05294069A (en)

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