JPH02134738A - Veneer type optical recording disk - Google Patents
Veneer type optical recording diskInfo
- Publication number
- JPH02134738A JPH02134738A JP63287931A JP28793188A JPH02134738A JP H02134738 A JPH02134738 A JP H02134738A JP 63287931 A JP63287931 A JP 63287931A JP 28793188 A JP28793188 A JP 28793188A JP H02134738 A JPH02134738 A JP H02134738A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- recording layer
- disk
- recording
- stress
- 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
- 230000003287 optical effect Effects 0.000 title claims description 11
- 239000010410 layer Substances 0.000 abstract description 69
- 239000011247 coating layer Substances 0.000 abstract description 10
- 239000000758 substrate Substances 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011253 protective coating Substances 0.000 abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000001755 magnetron sputter deposition Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光を用いて情報の記録、再生または消去を行
なう光記録円板に関す、。）
〔従来の技術〕
従来の光記録円板のｌｉ板板溝構造コンパクトディスク
に見られるように記録層が形成されている側にコート層
を形成して保１穫層としたり、記録層が成膜されていな
い側にもハードコート層を形成することが試みられてい
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical recording disk that records, reproduces, or erases information using light. ) [Prior Art] As seen in conventional optical recording discs with Li plate groove structure compact discs, a coating layer is formed on the side where the recording layer is formed to serve as a protection layer, or a coating layer is formed on the side where the recording layer is formed. Attempts have been made to form a hard coat layer also on the side where no film is formed.
しかし従来技術では、記録層が形成されている側のみに
保護層を形成、あるいは記録層か成膜されていない側に
もハードコート層を形成することが試みられているが、
樹脂基板を用いた場合に記録層側たけ保護層を形成する
場合は、記録層が形成されていない側から水分を吸収し
て基板が反るし、記録層が成膜されていない側に紫外線
硬化樹脂でバートコ−１−しても同じように水分を吸収
して基板が反るという問題点を付していた。However, in the prior art, attempts have been made to form a protective layer only on the side where the recording layer is formed, or to form a hard coat layer on the side where the recording layer is not formed.
When a resin substrate is used and a protective layer is formed on the side of the recording layer, moisture will be absorbed from the side where the recording layer is not formed and the substrate will warp, and ultraviolet rays will be exposed to the side where the recording layer is not formed. Even when using a cured resin, Bartco® 1 had the same problem of absorbing moisture and causing the substrate to warp.
そこで本発明はそのような課題を解決するものでその１
−１的とするところは、記録層が成膜されている側と、
記録層が成膜されていない側にそれぞれ異なった種類の
コート層を形成し、それら異なった種類のコート層の応
力を変えることによって、記録層か成膜されていない側
から水分を吸っても、異なる種類の応力を与えているの
で高温高湿ドてもディスクの反りが大きくならない。従
って、信頼性のある光記録円板とすることができるとこ
ろにある。Therefore, the present invention solves such problems, part 1.
-1 points are the side where the recording layer is formed,
By forming different types of coating layers on each side on which the recording layer is not formed and by changing the stress of these different types of coating layers, it is possible to prevent moisture from being absorbed from the side where the recording layer is not formed. Since different types of stress are applied, the disk does not warp significantly even under high temperature and high humidity conditions. Therefore, a reliable optical recording disk can be obtained.
本発明は光により情報の記録、再生または消去を行う光
記録円板の単板型＋１■造において、記録層が成膜され
ている側と、記録層が成膜されて、いない側にそれぞれ
異なった種類のコート層を形成し、それらの異なった種
類のコート層の応力を変えたことを特徴とする。The present invention applies to a single-plate type +1 structure of an optical recording disk that records, reproduces, or erases information using light. It is characterized by forming different types of coat layers and changing the stress of these different types of coat layers.
通常、コート剤は硬化すると収縮応力が働くので、応力
を制御するためにはコート剤の種類や配合あるいは塗布
厚を変えてやる方法がある。樹脂基板を用いる場合では
記録層がない側が水を吸収して膨張するので、記録層が
ない側の応力が大きくなるようにしておく。すなわち、
記録層がない側が水を吸って常温、常況度で平衡状態に
なったときディスクがフラットになるようにする。ある
いは使用環境温度範囲の中央付近でディスクがフラット
になるように設計するとよい。通常、樹脂基板を用いる
と記録層がない方が吸水して凸になる傾向があるので記
録層がない側の応力を大きくして１から４ミリラジアン
程度反るように設計する。ガラスなどの無機物の基板を
用いた場合は、成膜の応力により記録層側が凹になった
り凸になったりするので、コート層は常温でフラットに
なるようにするとよい。Usually, shrinkage stress acts on a coating agent when it hardens, so there are ways to control stress by changing the type, composition, or coating thickness of the coating agent. When using a resin substrate, the side without the recording layer absorbs water and expands, so the stress on the side without the recording layer should be increased. That is,
The side without the recording layer absorbs water so that the disc becomes flat when it reaches an equilibrium state at room temperature and normal conditions. Alternatively, it is better to design the disk so that it becomes flat near the center of the operating environment temperature range. Normally, when a resin substrate is used, the side without the recording layer tends to absorb water and become convex, so the stress on the side without the recording layer is increased to create a warp of about 1 to 4 milliradians. When an inorganic substrate such as glass is used, the recording layer side becomes concave or convex due to stress during film formation, so it is preferable that the coating layer is flat at room temperature.
以下本発明について図面に基づいて詳細に説明する。 The present invention will be explained in detail below based on the drawings.
第１図は本発明になる光ディスクの基本構成図であり、
１はポリカーボネートの基板、２は５ｔＡＩＮ層、３は
ＴｂＦｅＣｏの記録層、４は５ｉＡＩＮ層、５はＡＩの
反射膜、６は記録層がある側に形成された保護コート層
、７は記録層がない側に形成されたバートコ−１・層で
ある。１のポリカーボネートの基板は射出圧縮成形によ
って１゜６μピツチでスパイラル状のトラッキング用の
満尺ヒフオーマット用のピット列を形成したものである
。２の５ｉＡＩＮ層は５ｉＡＩの焼結ターゲットを用い
て、窒素とアルゴンの混合ガスを導入することによるＲ
Ｆ反応マグネトロンスパッタ法により成膜したものであ
る。３のＴｂＦｅＣｏの記録層はＴｂＦｅＣｏの合金タ
ーゲットを用いて、アルゴンガスを導入することによる
、Ｄｃマグネトロンスパッタ法により成膜したものであ
る。４（７）ＳｉＡＩＮ層は２及びりと同じく、５ｉＡ
ｌの焼結ターゲラ！・を用いて窒素とアルゴンの混合ガ
スを導入することによるＲＦ反応マグネトロンスパッタ
法によって成膜したものである。５はＡ１の金属ターゲ
ットを用いてアルゴンガスを導入することによるＤＣマ
グネトロンスパッタ法によって成膜したものである。６
はＡ１層の上にスビンコ−１・によって紫外線硬化樹脂
を塗布した後、高圧水銀灯によって紫外線を照射して硬
化させたものである。７はスピンコードによって紫外線
硬化樹脂を記録層が成膜されていない側のディスク面に
塗布した後、高圧水銀灯によって紫外線を照射して硬化
させてハードコートとした。この６と７においては紫外
線硬化樹脂の配合を変えて、７の収縮応力が大きくなる
ようにして、７側に２ミリラジアン凹になるようにした
。FIG. 1 is a basic configuration diagram of an optical disc according to the present invention,
1 is a polycarbonate substrate, 2 is a 5tAIN layer, 3 is a TbFeCo recording layer, 4 is a 5iAIN layer, 5 is an AI reflective film, 6 is a protective coating layer formed on the side where the recording layer is, and 7 is the recording layer. This is the Bartco-1 layer formed on the non-contact side. The polycarbonate substrate No. 1 was formed by injection compression molding to form pit rows for a full-scale Hi-Format for tracking in a spiral shape at a pitch of 1° and 6 μm. The 5iAIN layer of 2 is formed by using a sintered target of 5iAI and introducing a mixed gas of nitrogen and argon.
The film was formed by F reaction magnetron sputtering method. The recording layer of TbFeCo in No. 3 was formed by the DC magnetron sputtering method using a TbFeCo alloy target and introducing argon gas. 4(7) SiAIN layer is 5iA like 2 and
l's sintered Targera! The film was formed by an RF reaction magnetron sputtering method by introducing a mixed gas of nitrogen and argon. No. 5 is a film formed by a DC magnetron sputtering method using a metal target of A1 and introducing argon gas. 6
After coating an ultraviolet curable resin on the A1 layer using Svinco-1, the resin was cured by irradiating ultraviolet rays with a high-pressure mercury lamp. In No. 7, an ultraviolet curable resin was applied to the disk surface on the side on which the recording layer was not formed using a spin cord, and then cured by irradiating ultraviolet rays with a high-pressure mercury lamp to form a hard coat. In 6 and 7, the composition of the ultraviolet curable resin was changed to increase the shrinkage stress in 7, so that the 7 side was concave by 2 milliradians.
表１に本発明になるｉｌｌｌ型板記録円板と従来のｔｌ
を板型光紀録円板の、各温湿度での反り量を示す。Table 1 shows the illll type recording disk according to the present invention and the conventional tl type recording disk.
shows the amount of warpage of the plate-type optical log disc at each temperature and humidity.
表 １
ｉｌを位；ミリラジアン（記録層側に凸を正にとる）表
１の結果をみると明らかなように、本発明になる！１１
板型光記録円板は常温でも高温高湿下でも反り量が小さ
いことがわかる。ここでの反り量は反り角の最大値とし
た。Table 1 il = milliradian (convex on the recording layer side) As is clear from the results in Table 1, this is the invention! 11
It can be seen that the amount of warpage of the plate-type optical recording disk is small both at room temperature and under high temperature and high humidity conditions. The amount of warpage here was taken as the maximum value of the warp angle.
尚、本発明はこれらの実施例に限定されると考えられる
べきではなく、本発明の主旨を逸脱しない限り種々の変
更は可能である。例えば本発明ではＰＣ基板上にセラミ
ックス層、記録層、セラミックス層、金属層の４層（１
■造としたか、セラミックス層、記録層、セラミックス
層の３層構造でも全く問題はない。It should be noted that the present invention should not be considered limited to these examples, and various modifications can be made without departing from the gist of the present invention. For example, in the present invention, four layers (1
There is no problem at all with the three-layer structure of the ceramic layer, the recording layer, and the ceramic layer.
また、セラミックス層の例としては、５ｉＡＩＮ層の他
に、ＳｉＮ層、ＡＩＮ層、５ｉＡＩＮＯ層などでもよく
記録層を挟むセラミックス層の材質か異なっていても問
題ない。記録層としてはＴｂＦｅＣｏ層の他に、ＮｄＤ
ｙＦｅＣｏ層、ＧｄＴｂＦｅ層等の光磁気記録層の他に
、Ｔｅ−ＴｅｏＸ層、Ｔｅ５ｂＡｓ笠の相変化型、ンア
ニン等の有機色素を用いたものでも適用できる。記録層
の種類によってはセラミックス層は必要ない場合にも適
用できる。Further, as examples of the ceramic layer, in addition to the 5iAIN layer, a SiN layer, an AIN layer, a 5iAINO layer, etc. may be used, and there is no problem even if the materials of the ceramic layers sandwiching the recording layer are different. In addition to the TbFeCo layer, NdD is used as the recording layer.
In addition to magneto-optical recording layers such as a yFeCo layer and a GdTbFe layer, a Te-TeoX layer, a phase change type of Te5bAs cap, and a layer using an organic dye such as n-anine can also be used. Depending on the type of recording layer, the ceramic layer may not be necessary.
第１図は本発明の光記録媒体の基本構成図。 １・・・ポリカーボネートの基板 ２・・・５ｉＡＩＮ層 ＴｂＦｅＣｏの５己録層 ５ｉＡＩＮ層 Ａ１の反射膜 保護コート層 バートコ−１・層 出願人 セイコーエプソン株式会社 FIG. 1 is a basic configuration diagram of the optical recording medium of the present invention. 1... Polycarbonate substrate 2...5iAIN layer 5 layers of TbFeCo 5iAIN layer A1 reflective film protective coat layer Bartco-1 layer Applicant: Seiko Epson Corporation
Claims (1)
の単板型構造において、記録層が成膜されている側と、
記録層が成膜されていない側にそれぞれ異なった種類の
コート層を形成し、該異なった種類のコート層の応力を
変えたことを特徴とする単板型光記録円板。In a single-plate structure of an optical recording disk that records, reproduces, or erases information using light, the side on which the recording layer is formed;
1. A single-plate optical recording disk characterized in that different types of coat layers are formed on each side on which no recording layer is formed, and the stress of the different types of coat layers is changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63287931A JPH02134738A (en) | 1988-11-15 | 1988-11-15 | Veneer type optical recording disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63287931A JPH02134738A (en) | 1988-11-15 | 1988-11-15 | Veneer type optical recording disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134738A true JPH02134738A (en) | 1990-05-23 |
Family
ID=17723584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63287931A Pending JPH02134738A (en) | 1988-11-15 | 1988-11-15 | Veneer type optical recording disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123333A (en) * | 1990-09-14 | 1992-04-23 | Matsushita Electric Ind Co Ltd | Optical information recording medium |
-
1988
- 1988-11-15 JP JP63287931A patent/JPH02134738A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123333A (en) * | 1990-09-14 | 1992-04-23 | Matsushita Electric Ind Co Ltd | Optical information recording medium |
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