JPH02116034A - optical disk - Google Patents
optical diskInfo
- Publication number
- JPH02116034A JPH02116034A JP63267598A JP26759888A JPH02116034A JP H02116034 A JPH02116034 A JP H02116034A JP 63267598 A JP63267598 A JP 63267598A JP 26759888 A JP26759888 A JP 26759888A JP H02116034 A JPH02116034 A JP H02116034A
- Authority
- JP
- Japan
- Prior art keywords
- metal film
- recording
- recording metal
- organic polymer
- film
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は、レーザービーム等により記録および／または
再生することができる光ディスクに関し、とくに記録用
金属膜の特性が劣化するのを防止した光ディスクに関す
る。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an optical disc that can be recorded and/or reproduced using a laser beam or the like, and particularly relates to an optical disc that prevents the characteristics of a recording metal film from deteriorating. .
（従来の技術）
従来、レーザービーム等により記録および／または再生
することができる光ディスクとして、プラスチックのデ
ィスク基板上に、ＴｂＦｅＣｏ等の非晶質磁性薄膜をス
パッタリングして記録用金属膜を形成し、該記録用金属
膜を紫外線硬化型樹脂あるいは電子線硬化型樹脂等の有
機重合体保護膜で覆い、記録用金属膜を保護することが
知られている。また、ビデオディスクあるいはコンパク
トディスクにおいて、プラスチックのディスク基板に微
少なピットを形成し、その上に蒸着等によりアルミニウ
ムの記録用金属膜を形成し、該記録用金属膜を紫外線硬
化型樹脂あるいは電子線硬化型樹脂等の有機重合体保護
膜で覆い、前記記録用金属膜を保護することが知られて
いる。(Prior Art) Conventionally, as an optical disc that can be recorded and/or reproduced using a laser beam or the like, a recording metal film is formed by sputtering an amorphous magnetic thin film such as TbFeCo on a plastic disc substrate. It is known to protect the recording metal film by covering the recording metal film with an organic polymer protective film such as an ultraviolet curable resin or an electron beam curable resin. In addition, in the case of video discs or compact discs, minute pits are formed on a plastic disc substrate, an aluminum recording metal film is formed on the pits by vapor deposition, etc., and the recording metal film is coated with an ultraviolet curable resin or an electron beam. It is known to protect the recording metal film by covering it with an organic polymer protective film such as a curable resin.
（発明が解決しようとする課題）
しかしながら、上記従来の光ディスクにおいては、紫外
線硬化型樹脂あるいは電子線硬化型樹脂の有機重合体保
護膜に残留した塩素イオンが、ＴｂＦｅＣｏ等の非晶質
磁性薄膜やアルミニウム薄膜等の記録用金属膜を腐蝕す
るため、前記記録用金属膜の特性が劣化し、情報の記録
、再生にエラーが発生する等の問題点があった。(Problem to be Solved by the Invention) However, in the conventional optical disk described above, chlorine ions remaining in the organic polymer protective film of the ultraviolet curable resin or electron beam curable resin are exposed to the amorphous magnetic thin film such as TbFeCo. Since the recording metal film such as an aluminum thin film is corroded, the characteristics of the recording metal film deteriorate, resulting in problems such as errors occurring in recording and reproducing information.
（課題を解決するための手段）
本発明は、上記の課題に鑑み鋭意検討の結果なされたも
っであって、ディスク基板上に記録用金属膜を形成し、
該記録用金属膜を、塩素イオン捕捉剤が含有された有機
重合体保護膜で覆うことにより、記録用金属膜の特性が
劣化するのを防止したものである。(Means for Solving the Problems) The present invention has been made as a result of intensive studies in view of the above problems, and includes forming a recording metal film on a disk substrate,
By covering the recording metal film with an organic polymer protective film containing a chloride ion scavenger, the characteristics of the recording metal film are prevented from deteriorating.
（実施例）
以下、本発明の光ディスクを図面に基づき詳細に説明す
る。(Example) Hereinafter, the optical disc of the present invention will be explained in detail based on the drawings.
第１図は本発明の光ディスクの一実施例を示す断面図で
あって、ポリカーボネート、ポリアクリル樹脂等のプラ
スチックのディスク基板１上に、Ｔ ｂ Ｆ ｅ Ｃｏ
の非晶質磁性薄膜２および該非晶質磁性薄膜２を両側か
ら挾むようにしてＳｉＯｘからなる誘電体薄膜２ａをス
パッタリングにより形成しである。FIG. 1 is a sectional view showing an embodiment of the optical disc of the present invention, in which T b Fe Co
An amorphous magnetic thin film 2 and a dielectric thin film 2a made of SiOx are formed by sputtering so as to sandwich the amorphous magnetic thin film 2 from both sides.
３は有機重合体保護膜であって、紫外線硬化型樹脂ある
いは電子線硬化型樹脂をスピンコードで塗布し、紫外線
あるいは電子線を照射後硬化して形成しであるが、該有
機重合体保護膜２には、硝酸銀、金属石鹸類あるいはグ
ライコール類等の塩素イオン捕捉剤を含有させである。3 is an organic polymer protective film, which is formed by applying an ultraviolet curable resin or an electron beam curable resin with a spin cord and curing it after irradiating it with ultraviolet rays or electron beams; No. 2 contains a chloride ion scavenger such as silver nitrate, metal soaps, or glycols.
塩素イオン捕捉剤の添加量は有機重合体の残留塩素イオ
ンを除去できる量、すなわち当モル量より多くし、かつ
スピンコードにより良好に塗布形成することができる範
囲とする。The amount of the chloride ion scavenger to be added is set to be an amount that can remove residual chlorine ions from the organic polymer, that is, greater than the equimolar amount, and within a range that allows good coating formation with a spin cord.
有機重合体保護膜３を形成する樹脂としては、ウレタン
変成シリコン樹脂、ポリエステル系樹脂、ウレタンアク
リレート樹脂、エポキシアクリレート樹脂等を使用する
ことができる。紫外線硬化による場合には、上記樹脂に
光増感剤としてベンゾイン、ベンゾインメチルエーテル
、ベンゾインエチルエーテル、ベンゾインブチルエーテ
ル、ブチロイン、ジフェニルジスルフィド、アンスラキ
ノン、クロロアンスラキノン等を０．１〜５重量パーセ
ント添加すれば良い、また電子線硬化の場合には、電子
線加速器で、加速電圧０．１〜２０Ｍｅｖ、線量率０．
１〜６０Ｍｒａｄ／秒で０．１〜１０Ｍｒａｄを照射し
硬化すれば良い。As the resin forming the organic polymer protective film 3, urethane-modified silicone resin, polyester resin, urethane acrylate resin, epoxy acrylate resin, etc. can be used. In the case of ultraviolet curing, 0.1 to 5% by weight of benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin butyl ether, butyroin, diphenyl disulfide, anthraquinone, chloroanthraquinone, etc. is added to the resin as a photosensitizer. In the case of electron beam curing, use an electron beam accelerator at an acceleration voltage of 0.1 to 20 Mev and a dose rate of 0.
It may be cured by irradiating with 0.1 to 10 Mrad at 1 to 60 Mrad/sec.
罠胤■ユ
直径１３０ｍｍのポリカーボネートのディスク基板上に
、スパッタリングでＳｉＯｘ膜を７００００Ａの厚みで
それぞれ順次製膜した。ついで′、光増感剤として、ベ
ンゾインメチルエーテルを０゜５重量％含有するウレタ
ンアクリレート系紫外線硬化型樹脂に下記の塩素イオン
捕捉剤を配合後、スピンコーターにて２０μｍの厚みで
塗布した。On a polycarbonate disk substrate with a diameter of 130 mm, SiOx films with a thickness of 70,000 A were sequentially formed by sputtering. Next, the following chloride ion scavenger was added to a urethane acrylate ultraviolet curable resin containing 0.5% by weight of benzoin methyl ether as a photosensitizer, and coated with a spin coater to a thickness of 20 μm.
ついで充分な量の紫外線を照射して、前記紫外線硬化型
樹脂を硬化させ、有機重合体保護膜を形成して光ディス
クとしな。Then, a sufficient amount of ultraviolet rays are irradiated to cure the ultraviolet curable resin and form an organic polymer protective film to form an optical disc.
塩素イオン捕捉剤として硝酸銀を５００ｐｐｍ添加した
場合、金属石鹸を４００ｐｐｍ添加した場合、グライコ
ールを３００ｐｐｍ添加した場合のそれぞれについて、
温度７０℃、関係湿度８５％で１０００時間の促進試験
を行った結果、いずれの場合にもＴｂＦｅＣｏ膜に腐蝕
は見られず、情報の記録、再生にエラー発生率の増加は
見られなかった。For each case when 500 ppm of silver nitrate was added as a chloride ion scavenger, when 400 ppm of metal soap was added, and when 300 ppm of glycol was added,
As a result of conducting an accelerated test for 1000 hours at a temperature of 70° C. and relative humidity of 85%, no corrosion was observed in the TbFeCo film in any case, and no increase in the error rate was observed in recording or reproducing information.
ルｍ
塩素イオン捕捉剤を添加しない他は上記と同様にして光
ディスクを形成し、上記と同一条件で促進試験を行った
結果、Ｔ ｂ Ｆ ｅ Ｃｏ Ｗ１４全面に腐蝕が見ら
れ、記録、再生にエラー発生率が大幅に増加した。An optical disk was formed in the same manner as above, except that no chloride ion scavenger was added, and an accelerated test was conducted under the same conditions as above. As a result, corrosion was observed on the entire surface of T b Fe Co W14, and recording and playback were difficult. Error rate increased significantly.
以上、実施例として、非晶質磁性薄膜２を両側から挾む
ようにしてＳｉＯｘからなる誘電体薄膜２ａを形成した
ものについて説明したが、本発明はこれに限定され゛ず
、非晶質磁性薄膜２の片側に誘電体薄膜２ａを形成した
もの、さらにレーザーディスク、コンパクトディスクの
ようにアルミニウムの記録用金属膜を形成したものにも
適用できる。In the above embodiment, the dielectric thin film 2a made of SiOx was formed so as to sandwich the amorphous magnetic thin film 2 from both sides, but the present invention is not limited to this. It can be applied to devices in which a dielectric thin film 2a is formed on one side, and also to devices in which an aluminum recording metal film is formed, such as laser disks and compact disks.
（発明の効果）
以上のように、本発明は、記録用金属膜を塩素イオン捕
捉剤が含有された有機重合体保護膜で覆ったので、記録
用金属膜を保護する有機重合体保護膜に残留する塩素イ
オンを、塩素イオン捕捉剤により補足除去することがで
きるから、記録用金属膜が塩素イオンにより腐蝕される
のを防止することができ、記録用金属膜の特性が劣化す
るのを防止することができる等の利点がある。(Effects of the Invention) As described above, the present invention covers a recording metal film with an organic polymer protective film containing a chloride ion scavenger. Since residual chlorine ions can be supplemented and removed using a chlorine ion scavenger, it is possible to prevent the recording metal film from being corroded by chlorine ions, thereby preventing the characteristics of the recording metal film from deteriorating. There are advantages such as being able to
第１図は本発明の光ディスクの一実施例を示す断面図で
ある。
図中、１はディスク基板、２は記録用金属膜、２ａは誘
電体薄膜、３は塩素イオン捕捉剤を含有する有機重合体
保護膜である。FIG. 1 is a sectional view showing an embodiment of the optical disc of the present invention. In the figure, 1 is a disk substrate, 2 is a recording metal film, 2a is a dielectric thin film, and 3 is an organic polymer protective film containing a chloride ion scavenger.
Claims (1)
属膜を、塩素イオン捕捉剤が含有された有機重合体保護
膜で覆ったことを特徴とする光ディスク。An optical disc characterized in that a recording metal film is formed on a disc substrate, and the recording metal film is covered with an organic polymer protective film containing a chloride ion scavenger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63267598A JPH02116034A (en) | 1988-10-24 | 1988-10-24 | optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63267598A JPH02116034A (en) | 1988-10-24 | 1988-10-24 | optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02116034A true JPH02116034A (en) | 1990-04-27 |
Family
ID=17446960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63267598A Pending JPH02116034A (en) | 1988-10-24 | 1988-10-24 | optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02116034A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009620A1 (en) * | 1998-08-17 | 2000-02-24 | Dsm N.V. | Photocurable resin composition with a low chlorine content |
| JP2006250066A (en) * | 2005-03-11 | 2006-09-21 | Matsushita Electric Ind Co Ltd | Pump and liquid supply apparatus having the same |
| US8721314B2 (en) | 2009-10-29 | 2014-05-13 | Eiji Sugano | Noodle maker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129432A (en) * | 1984-07-19 | 1986-02-10 | Matsushita Electric Ind Co Ltd | optical information recording medium |
-
1988
- 1988-10-24 JP JP63267598A patent/JPH02116034A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129432A (en) * | 1984-07-19 | 1986-02-10 | Matsushita Electric Ind Co Ltd | optical information recording medium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009620A1 (en) * | 1998-08-17 | 2000-02-24 | Dsm N.V. | Photocurable resin composition with a low chlorine content |
| JP2006250066A (en) * | 2005-03-11 | 2006-09-21 | Matsushita Electric Ind Co Ltd | Pump and liquid supply apparatus having the same |
| US8721314B2 (en) | 2009-10-29 | 2014-05-13 | Eiji Sugano | Noodle maker |
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