JPH01178146A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH01178146A JPH01178146A JP63001924A JP192488A JPH01178146A JP H01178146 A JPH01178146 A JP H01178146A JP 63001924 A JP63001924 A JP 63001924A JP 192488 A JP192488 A JP 192488A JP H01178146 A JPH01178146 A JP H01178146A
- Authority
- JP
- Japan
- Prior art keywords
- recording film
- optical disk
- double
- adhesive tape
- substrate
- 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 abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000002390 adhesive tape Substances 0.000 claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 239000012790 adhesive layer Substances 0.000 abstract description 5
- 238000004299 exfoliation Methods 0.000 abstract 2
- 238000005187 foaming Methods 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process 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
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 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〕
本発明は光学的に情報の記録再生を行う光ディスクに関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc on which information is optically recorded and reproduced.
従来光により情報の記録再生を行う光ディスクは透明な
プラスチック等の基板の片側にスパッタ法や蒸着法等の
真空成膜法によって記録膜を成膜しており、通常記録膜
の保護のため記録膜を内側にして、同じ構造の記録膜を
有する光ディスク基板とおし、または同径の記録膜を有
しないダミーディスク基板と貼り合せる方法がとられる
。ダミーディスク基板は通常は記録膜を有する光ディス
ク基板と同材質のものが用いられるが、必ずしもそれに
かぎられるわけではなく、結晶質ガラス基板、アルミ基
板などであってもよい。光ディスク基板は、射出成形、
２Ｐ法もしくはダイレクトカット法などによりグループ
を形成された基板上に記録膜、保護膜等が形成されたも
のである。Conventionally, optical discs that record and reproduce information using light have a recording film formed on one side of a substrate made of transparent plastic or the like using a vacuum film forming method such as sputtering or vapor deposition. A method is used in which the optical disk substrate is attached with the optical disc substrate facing inside and having a recording film of the same structure, or a dummy disk substrate having the same diameter and no recording film. The dummy disk substrate is usually made of the same material as the optical disk substrate having the recording film, but it is not necessarily limited to this, and may be a crystalline glass substrate, an aluminum substrate, or the like. Optical disc substrate is injection molded,
A recording film, a protective film, etc. are formed on a substrate on which groups are formed by a 2P method or a direct cut method.
しかし記録膜を内側にして貼り合わせる方法のうちディ
スク全面を貼り合わせた構造をとった場合、貼り合わせ
に用いる接着層の影響で記録膜が剥れてしまうという問
題がある。すなわち紫外線硬化樹脂や２液温合樹脂等の
接着剤を用いる場合、環境条件の変化にともなってディ
スクが変形しようとするときに接着剤からなる接着層と
の変形量の差により応力を発生しこの応力で膜が剥れて
しまうという問題がある０例えば参考例としてエポキシ
アクリレート系紫外線硬化樹脂で貼り合わせた光ディス
クを作成し、７０℃９０％の条件で環境試験を行ったと
ころ、２４時間後に記録膜の剥離が全面に生じた。However, when a structure is adopted in which the entire surface of the disk is bonded among the bonding methods with the recording film inside, there is a problem in that the recording film peels off due to the influence of the adhesive layer used for bonding. In other words, when using an adhesive such as an ultraviolet curing resin or a two-component thermal resin, when the disk tries to deform due to changes in environmental conditions, stress is generated due to the difference in the amount of deformation between the disc and the adhesive layer. There is a problem that the film may peel off due to this stress.0 For example, as a reference example, an optical disk bonded with epoxy acrylate-based ultraviolet curing resin was made and an environmental test was conducted at 70°C and 90%. Peeling of the recording film occurred over the entire surface.
さらにはりあわせに両面接着テープを用いる場合は接着
層の大部分をしめる基材が十分にのびないため環境条件
の変化で応力が発生し記録膜が剥れるという問題がある
。Furthermore, when a double-sided adhesive tape is used for bonding, there is a problem in that the base material that covers most of the adhesive layer does not stretch sufficiently, causing stress to occur due to changes in environmental conditions and causing the recording film to peel off.
本発明の目的は環境条件が変化しても膜が剥れることが
ない長期信頼性に優れた全面貼り合わせ構造の光ディス
クを提供することにある。An object of the present invention is to provide an optical disk having a fully laminated structure that has excellent long-term reliability and whose film does not peel off even when environmental conditions change.
本発明の光ディスクは、単板の光ディスク基板どおしを
記録膜側を内側にして両面接着テープで貼り合わせるか
、単板の光ディスク基板と記録膜をもたないダミーディ
スク基板とを、単板光ディスク基板の記録膜側を内側と
して、両面接着テープで貼り合わせた光ディスクにおい
て、該両面接着テープの基材が発泡加工されたフオーム
であることを特徴とするものである。The optical disk of the present invention can be produced by bonding two single-layer optical disk substrates with the recording film side inside using double-sided adhesive tape, or by bonding a single-layer optical disk substrate and a dummy disk substrate without a recording film. The present invention is an optical disc in which an optical disc substrate is bonded with a double-sided adhesive tape with the recording film side facing inside, and the base material of the double-sided adhesive tape is a foamed foam.
接着剤で十分なやわらかさを得るためには接着剤自身の
成分や分子量を変える必要があり、接着力等の緒特性を
劣化させることなくこれを行うのは非常に困難である。In order to obtain sufficient softness with an adhesive, it is necessary to change the components and molecular weight of the adhesive itself, and it is extremely difficult to do this without degrading adhesive properties and other properties.
一方、両面接着テープで十分なやわらかさを得るために
は接着層の大部分をしめる基材をやわらかくすれば良く
、接着剤をやわらかくする場合に比べ比較的簡単に行え
る。さらに両面接着テープの場合は基材によらず粘着剤
を自由に選択できるため、接着力等諸特性を著しく劣化
させることもない０本発明は両面接着テープの基板とし
て発泡加工したフオームを用いることにより長期信頼性
のすぐれた全面貼り合わせが可能であることを見いだし
たことに基づいている。On the other hand, in order to obtain sufficient softness with a double-sided adhesive tape, it is sufficient to soften the base material that covers most of the adhesive layer, which is relatively easier than softening the adhesive. Furthermore, in the case of double-sided adhesive tapes, the adhesive can be freely selected regardless of the base material, so there is no significant deterioration of various properties such as adhesive strength.The present invention uses a foamed foam as the substrate of double-sided adhesive tapes. This is based on the discovery that full-surface bonding with excellent long-term reliability is possible.
フオームが、独立気泡フオームである場合にはやわらか
さが特にすぐれるため、特に望ましい基材である。When the foam is a closed cell foam, it is a particularly desirable base material because it has particularly excellent softness.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の模式的な断面図である。第
１図に示すように、透明プラスチック基板としてのポリ
カーボネートの基板１と、記録膜３の両面を保護膜２で
サンドイッチ状にはさんで前記基板１の一方の面に成膜
された情報記録層と前記情報記録層側に接着されたフオ
ーム基材の両面接着テープ４とを含む。FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention. As shown in FIG. 1, an information recording layer is formed on one side of the substrate 1 by sandwiching both sides of a polycarbonate substrate 1 as a transparent plastic substrate and a recording film 3 with a protective film 2. and a foam-based double-sided adhesive tape 4 adhered to the information recording layer side.
両面接着テープ４は弾性率が著しく小さいなめ、基板１
の熱膨張による変形、吸湿による変形にも容易に追従し
保護膜２．記録膜３にはほとんど応力を加えない。Since the double-sided adhesive tape 4 has a significantly low elastic modulus, it
The protective film 2. easily follows deformation due to thermal expansion and moisture absorption. Almost no stress is applied to the recording film 3.
このように形成した光ディスクで８０℃９０％の条件で
６００時間まで環境試験を行った結果、保護膜２．記録
膜３が剥れることはなかった。As a result of conducting an environmental test on the optical disk formed in this manner at 80°C and 90% for up to 600 hours, the protective film 2. The recording film 3 did not peel off.
本実施例には、同構造の光ディスク基板どおしをはり合
わせた光ディスクを示したが、一方の基板をダミーディ
スクとした場合においても、同様の改善効果がみられた
。Although this example shows an optical disk in which two optical disk substrates having the same structure are glued together, similar improvement effects were observed even when one of the substrates was used as a dummy disk.
以上説明したように本発明の光ディスクは、発泡加工し
たフオーム基材の両面接着テープで貼り合わせることに
より、環境条件の変化に強くなり、記録膜のＭ離が発生
することを防止できるという効果がある。As explained above, the optical disc of the present invention has the effect of being resistant to changes in environmental conditions and preventing the occurrence of M peeling of the recording film by bonding foamed foam base materials with double-sided adhesive tape. be.
第１図は本発明の一実施例の模式的な断面図である。
１・・・基板、２・・・保護膜、３・・・記録膜、４・
・・両面接着テープ。FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Protective film, 3... Recording film, 4...
・Double-sided adhesive tape.
Claims (1)
両面接着テープで貼り合わせるか、単板の光ディスク基
板と記録膜をもたないダミーディスク基板とを、単板光
ディスク基板の記録膜側を内側として、両面接着テープ
で貼り合わせた光ディスクにおいて、該両面接着テープ
の基材が発泡加工されたフォームであることを特徴とす
る光ディスク。Either attach two single optical disk substrates with the recording film side inside using double-sided adhesive tape, or attach a single optical disk substrate and a dummy disk substrate without a recording film to the recording film side of the single optical disk substrate. What is claimed is: 1. An optical disk in which the inner side is bonded with a double-sided adhesive tape, wherein the base material of the double-sided adhesive tape is a foamed foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63001924A JPH01178146A (en) | 1988-01-08 | 1988-01-08 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63001924A JPH01178146A (en) | 1988-01-08 | 1988-01-08 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01178146A true JPH01178146A (en) | 1989-07-14 |
Family
ID=11515146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63001924A Pending JPH01178146A (en) | 1988-01-08 | 1988-01-08 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01178146A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5487926A (en) * | 1990-11-22 | 1996-01-30 | Tdk Corporation | Optical disk |
-
1988
- 1988-01-08 JP JP63001924A patent/JPH01178146A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5487926A (en) * | 1990-11-22 | 1996-01-30 | Tdk Corporation | Optical disk |
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