JPH0379771B2 - - Google Patents
Info
- Publication number
- JPH0379771B2 JPH0379771B2 JP59262713A JP26271384A JPH0379771B2 JP H0379771 B2 JPH0379771 B2 JP H0379771B2 JP 59262713 A JP59262713 A JP 59262713A JP 26271384 A JP26271384 A JP 26271384A JP H0379771 B2 JPH0379771 B2 JP H0379771B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- optical disk
- replica
- signal recording
- present
- 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.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、光デイスクの構造に係り、特に２枚
のレプリカをホツトメルトタイプの接着剤で貼り
合わせて成る光デイスクに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the structure of an optical disk, and particularly to an optical disk formed by bonding two replicas together using a hot melt type adhesive.
従来の光デイスクの構造は、例えば、
USP4310919号公報に記載のように、２枚のレプ
リカ（replicce）を接着剤によつて貼り合わせ、
デイスク端部迄平面構造になつており、また、そ
れに用いる接着剤としては、特開昭58−6536号公
報に記載のように、ホツトメルトタイプの接着剤
があり、最も一般的に使用されている。
The structure of a conventional optical disk is, for example,
As described in USP4310919, two replicas are pasted together with adhesive,
It has a flat structure up to the edge of the disk, and the adhesive used for it is a hot melt type adhesive, as described in JP-A-58-6536, which is the most commonly used adhesive. There is.
しかしながら、従来の光デイスクにおいては、
再生時において、温度上昇とデイスクの回転によ
る遠心力とによつて、接着剤がデイスクの外周に
向かつて流動し、デイスクの外部へはみ出して、
デイスクの表面を汚してしまうという点について
考慮されていなかつた。 However, in conventional optical discs,
During playback, due to the rise in temperature and the centrifugal force caused by the rotation of the disk, the adhesive flows toward the outer periphery of the disk and spills out to the outside of the disk.
No consideration was given to the possibility of staining the surface of the disk.
本発明は、上記した様な従来考慮されていなか
つた点について鑑みなされたものであり、従つ
て、本発明の目的は、接着剤の外部への流出を防
止した光デイスクを提供することにある。
The present invention has been made in view of the above-mentioned points that have not been considered in the past.Therefore, an object of the present invention is to provide an optical disc that prevents adhesive from leaking to the outside. .
上記した目的を達成するために、本発明では、
デイスクを貼り合わせている接着剤がある程度流
動しても、実害が無い様に、レプリカの信号記録
面の外周部に流動接着剤流入用の凹みを設けるよ
うにしたものである。
In order to achieve the above-mentioned object, in the present invention,
In order to prevent actual damage even if the adhesive bonding the disks flows to some extent, a recess is provided on the outer periphery of the signal recording surface of the replica for the flowing adhesive to flow into.
以下、本発明の一実施例を第１図により説明す
る。
An embodiment of the present invention will be described below with reference to FIG.
第１図は本発明の一実施例における光デイスク
外周部の断面図である。 FIG. 1 is a sectional view of the outer periphery of an optical disk in one embodiment of the present invention.
第１図に示す様に、本実施例における光デイス
クの構造は、厚さ1.2mmのPMMA（ポリメチルメ
タクリレート）から成るレプリカ１に対し、その
信号記録面側の表面にAl反射膜２を500〜1.000Å
の厚さで形成し、さらにその上に約10μｍの保護
膜３を形成して、そして、その様なAl反射膜２
と保護膜３とを形成したレプリカ１を２枚対称に
約50μｍの厚さのホツトメルトタイプの接着剤層
４で貼り合わせた構造となつている。そして、さ
らには、光デイスクの最外周信号記録ピツト５と
レプリカ最外周部６との間に、レプリカ１の信号
記録平面７に対して50μｍ以上の深さになるよう
な凹み８が設けてある。 As shown in FIG. 1, the structure of the optical disk in this example is that a replica 1 made of PMMA (polymethyl methacrylate) with a thickness of 1.2 mm is coated with an Al reflective film 2 on the signal recording surface side. ~1.000Å
A protective film 3 of about 10 μm is further formed on top of the protective film 3, and then such an Al reflective film 2 is formed.
It has a structure in which two replicas 1, each having a protective film 3 formed thereon, are symmetrically bonded together with a hot-melt adhesive layer 4 having a thickness of about 50 μm. Further, a recess 8 is provided between the outermost signal recording pit 5 of the optical disk and the outermost peripheral portion 6 of the replica, with a depth of 50 μm or more relative to the signal recording plane 7 of the replica 1. .
本実施例の様な構成にすれば、再生時における
温度上昇と遠心力により、接着剤４が光デイスク
の外周に向つて流動しても、流動した接着剤４は
凹み８の中に流入される為、光デイスクの外部に
はほとんど流出されない。 With the configuration of this embodiment, even if the adhesive 4 flows toward the outer periphery of the optical disk due to temperature rise and centrifugal force during playback, the flowing adhesive 4 will not flow into the recess 8. Therefore, almost no data is leaked outside the optical disk.
また、第２図は本発明の他の実施例における光
デイスク外周部の断面図である。 Further, FIG. 2 is a sectional view of the outer peripheral portion of an optical disk in another embodiment of the present invention.
第２図に示す様に、本実施例では、凹み８をレ
プリカ最外周部６迄延長して設けてある。 As shown in FIG. 2, in this embodiment, the recess 8 is extended to the outermost periphery 6 of the replica.
本実施例でも、流動した接着剤４がこの凹み８
に流入されるため、光デイスクの表面迄流動しな
い。 In this embodiment as well, the fluidized adhesive 4 is placed in this recess 8.
Since the liquid flows into the surface of the optical disk, it does not flow to the surface of the optical disk.
本発明によれば、接着剤が流動しても、光デイ
スク外部への流出は防ぐことができるという効果
がある。
According to the present invention, even if the adhesive flows, it can be prevented from flowing out to the outside of the optical disk.
また、一般に、光デイスクにおける再生時の温
度環境上限を決定付けているのは、接着剤層の流
動であるが、本発明によれば、上記した様に接着
剤層の流動による影響を少なくすることができる
ので、従来の光デイスクにおける再生時の温度環
境上限が50℃であるのに対し、本発明では約55℃
と、５℃程度アツプすることが可能となるという
効果もある。 Furthermore, in general, it is the flow of the adhesive layer that determines the upper limit of the temperature environment during playback of optical discs, but according to the present invention, as described above, the influence of the flow of the adhesive layer can be reduced. Therefore, while the upper limit of the temperature environment during playback for conventional optical discs is 50°C, with the present invention, the upper limit of the temperature environment during playback is approximately 55°C.
This also has the effect of making it possible to raise the temperature by about 5°C.
第１図は、本発明の一実施例における光デイス
ク外周部の断面図である。また、第２図は、本発
明の他の実施例における光デイスク外周部の断面
図である。
１……レプリカ、２……Al反射膜、３……保
護膜、４……接着剤層、５……最外周信号記録ビ
ツト、６……レプリカ最外周部、７……レプリカ
信号記録平面、８……凹み。
FIG. 1 is a sectional view of the outer periphery of an optical disk in one embodiment of the present invention. Further, FIG. 2 is a sectional view of the outer peripheral portion of an optical disk in another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Replica, 2... Al reflective film, 3... Protective film, 4... Adhesive layer, 5... Outermost signal recording bit, 6... Replica outermost part, 7... Replica signal recording plane, 8...dent.
Claims (1)
成した該反射膜が相対向するよう２枚のレプリカ
を接着剤により貼り合わせて成る光デイスクにお
いて、前記レプリカの信号記録面上における最外
周の信号記録ピツトの外側に凹みを設け、該凹み
により前記接着剤が光デイスクの外部に流出しな
いようにしたことを特徴とする光デイスク。1. In an optical disk in which a reflective film is formed on the signal recording surface of a replica, and two replicas are bonded together with an adhesive so that the formed reflective films face each other, the outermost circumference on the signal recording surface of the replica is An optical disc characterized in that a recess is provided on the outside of the signal recording pit, and the recess prevents the adhesive from flowing out to the outside of the optical disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59262713A JPS61142543A (en) | 1984-12-14 | 1984-12-14 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59262713A JPS61142543A (en) | 1984-12-14 | 1984-12-14 | Optical disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61142543A JPS61142543A (en) | 1986-06-30 |
| JPH0379771B2 true JPH0379771B2 (en) | 1991-12-19 |
Family
ID=17379555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59262713A Granted JPS61142543A (en) | 1984-12-14 | 1984-12-14 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61142543A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362932U (en) * | 1986-10-07 | 1988-04-26 | ||
| JPH01103024U (en) * | 1987-12-25 | 1989-07-12 | ||
| JPH0753130Y2 (en) * | 1988-02-26 | 1995-12-06 | 日本電気株式会社 | Information carrier disc |
| JP2747081B2 (en) * | 1989-03-31 | 1998-05-06 | 日立マクセル株式会社 | Method for producing transparent substrate for optical recording medium and molding die |
| JPH0393050A (en) * | 1989-09-05 | 1991-04-18 | Canon Inc | Optical recording medium |
| JP2715176B2 (en) * | 1990-03-13 | 1998-02-18 | 富士写真フイルム株式会社 | Optical recording medium |
| EP3660846A4 (en) * | 2017-07-25 | 2020-08-05 | Sony Corporation | Optical recording medium and method for producing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079540A (en) * | 1983-10-06 | 1985-05-07 | C B S Sony Rekoode Kk | Optical recording medium |
| JPS60160038A (en) * | 1984-01-31 | 1985-08-21 | Matsushita Electric Ind Co Ltd | Information recording disk |
-
1984
- 1984-12-14 JP JP59262713A patent/JPS61142543A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079540A (en) * | 1983-10-06 | 1985-05-07 | C B S Sony Rekoode Kk | Optical recording medium |
| JPS60160038A (en) * | 1984-01-31 | 1985-08-21 | Matsushita Electric Ind Co Ltd | Information recording disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61142543A (en) | 1986-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0379771B2 (en) | ||
| JPS59177745A (en) | Recording panel facing composite | |
| JPH01287841A (en) | Optical information recording medium | |
| JPH034978Y2 (en) | ||
| JPH0433555Y2 (en) | ||
| JPS61198445A (en) | Optical disc | |
| JP2692146B2 (en) | optical disk | |
| JPS6348631A (en) | Disk-shaped recording medium | |
| JPH0344838A (en) | Optical disk | |
| JPS60243835A (en) | Optical recording carrier | |
| JPS60256937A (en) | Optical information carrier disc | |
| JPH0348730Y2 (en) | ||
| JPH0439135B2 (en) | ||
| JPS61217944A (en) | Information recording disk | |
| JPS6047247A (en) | Recording medium | |
| JPS59175046A (en) | Information carrier disk | |
| JPH1011803A (en) | Optical information recording medium | |
| KR940000362Y1 (en) | Optical disk | |
| JP2551995B2 (en) | Optical memory device | |
| JPS61126645A (en) | Optical memory element | |
| JPS61236044A (en) | Discoid recording carrier | |
| JPS58193362U (en) | Disc-shaped information recording medium | |
| JPS61168149A (en) | Information recording disk | |
| JPS6020336A (en) | Manufacture of information carrier disk | |
| JPS5843636U (en) | optical recording/playback disc |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |