JPS6163942A - Optical information recording disk - Google Patents

Optical information recording disk

Info

Publication number
JPS6163942A
JPS6163942A JP59186002A JP18600284A JPS6163942A JP S6163942 A JPS6163942 A JP S6163942A JP 59186002 A JP59186002 A JP 59186002A JP 18600284 A JP18600284 A JP 18600284A JP S6163942 A JPS6163942 A JP S6163942A
Authority
JP
Japan
Prior art keywords
warp
layer
disk
substrate
protective layer
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
JP59186002A
Other languages
Japanese (ja)
Inventor
Sadao Sakamoto
阪本 貞夫
Kaji Uchihara
内原 可治
Masahiro Higuchi
政廣 樋口
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP59186002A priority Critical patent/JPS6163942A/en
Publication of JPS6163942A publication Critical patent/JPS6163942A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Abstract

PURPOSE:To prevent the warp of a disk by providing a warp preventing layer between a protection layer and the surface of a disk substrate at the side where no information is recorded or a reflection film to prevent the warp of the disk substrate. CONSTITUTION:The warp preventing layer 5 is provided on the surface of a disk substrate 1 at the opposite side to the surface where the information is recorded. Thus a protection layer 3 is formed on the single side of the substrate 1 with the layer 5 provided on the other side to keep good balance in terms of the warp. As a result, the warp of the substrate 1 is avoided. In case the film 5 is provided between the layer 3 and a reflection film 2, the stress produced at the layer 3 is buffed by the layer 5. This also prevented the warp of the substrate 1.

Description

【発明の詳細な説明】 イ、産業上の利用分野 本発明に、コンパクトディスクと称されるデジタルオー
ディオディスク若しくげ、光学式ビデオディスク等の、
光学的に情鏝が記録されているディスクの構造に関する
ワ ロ、従来の技術 ]ンパクトディスクと称されゐデジタルオーディオディ
スクが、例えば、「放送技術」昭和56年4月号第31
6〜奥317頁、[日経エレクトロニクスJ1981年
8月17日叶第187〜206頁等にて紹介されている
DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention applies to digital audio discs called compact discs, optical video discs, etc.
Conventional technology regarding the structure of discs on which information is optically recorded] A digital audio disc called a compact disc was published in, for example, ``Broadcasting Technology'', April 1985, No. 31.
Introduced in Nikkei Electronics Journal, August 17, 1981, Kano No. 187-206, etc.

渭2図ζ1従来の一没的なコンパクトディスクの構造を
示すものであるラボリカーボネートのディスク状基盤i
l+の一面に情報がピット(凹7t、y8)の形で形成
されて分り、この上にアルミニウム反射膜+21が設け
られており、更にこの上に紫外線硬化型の樹脂保護層(
31が設けられている、そして、この樹脂保護1vlf
:(lにラベル(41がシルク印刷されている。ディス
クの厚みitj汀略1,2n程度である。
Figure 2 ζ 1 Disc-shaped base made of laboratory carbonate, which shows the structure of a conventional compact disc.
It can be seen that information is formed in the form of pits (concave 7t, y8) on one side of l+, on which an aluminum reflective film +21 is provided, and on top of this an ultraviolet curing resin protective layer (
31 is provided, and this resin protection 1vlf
:(A label (41) is silk-printed on the disc. The thickness of the disc is approximately 1.2 nm.

斯かる光学式のディスフケ、光による非接触再生である
之め、半水人的な寿命が期待されているが、実際の市場
における野合については未知の点が多い。例えば、ディ
スクにプラスチ7り表面に高密度に微少なビフトヲ彫り
こんだものであり、高い加工精度を必要と丁ゐものであ
るためわずかの変形(肉眼による観察で汀検出できない
8度の2によって特性の劣化を生ずるっ特1にコンパク
トディスクは車載用として従来のり、彰気テープ方式の
カーオーディオシステムにとってかわるものと期待され
ているが、その口解決きれなければならない問題の一つ
が、屯Fシ条件におけるディスクの変形に関する間!実
であるっ斯かるディスクの変形の中でhelものにディ
スクの反りがある一、l;!11チ、i31凶に於いて
、ディスクの基準面(ターンテーブルに接する而、図に
、!i5いてXで示す部分)に対して、垂直((人材す
る+’e(B 1 n +に対して反射光(BOqt、
Jのなす反り角度(θ」を1.6°以下とするCとが、
良好な再生の為に必要である。
Since such an optical disc is a non-contact regeneration using light, it is expected to have a lifespan similar to that of a semi-water person, but there are many unknowns regarding its performance in the actual market. For example, a disk is made of plastic and minutely engraved bifurcations are engraved on the surface of the disk, and as it requires high processing precision, there may be slight deformation (due to the 8 degrees 2, which cannot be detected with the naked eye). Compact discs are expected to replace conventional adhesive tape-based car audio systems for use in cars, but one of the problems that must be solved is that Regarding the deformation of the disc under the conditions of The reflected light (BOqt,
C, which makes the warp angle (θ) of J less than 1.6°, is
Necessary for good reproduction.

従来のディスクは高1品(例えば100r)中に放膜し
て督くと反り?生じ、その後室温中においても、元に戻
ら匁ない。
Will conventional discs warp if they are released and polished during a high-speed product (for example, 100R)? After that, it does not return to its original state even at room temperature.

ハ、発明が解決し工すとf6間頭点 上述したディスクの反り?防止せんとするものであ勾ワ ニ、間劇点奮解決する為の手段 ディスク状基盤の1ff畢が記録されていない側の表面
若しくは前記反射膜とfPII記保護層との間に対して
、ディスク状基盤の反0を防止する為の反り防止層を設
は友ものである。
Ha, if the invention is solved and engineered, will the above-mentioned warping of the disc occur between f6? Means for resolving intermittent flashing and flashing: The disk should be placed on the surface of the disk-shaped substrate on which the 1FF layer is not recorded or between the reflective film and the fPII protection layer. It is a good idea to provide an anti-warp layer to prevent the shape of the substrate from warping.

ホ、作 用 情報が記録されていない方の表面に対して反り防止層を
設けt場合には、ディスク状基盤の一面に保護層が、他
面に反り防止層が設けられることに工9、反りに関して
バランスがとれることによりディスク状基盤の反りが防
止される。
E. If a warpage prevention layer is provided on the surface on which no operational information is recorded, a protective layer is provided on one side of the disc-shaped substrate and a warpage prevention layer is provided on the other side. A balance with respect to warpage prevents warping of the disc-shaped base.

一方、反射膜と保護層との間に対して反り防止層を設は
次場合に框、保護層に生じる応力が反り防止層に依って
緩衝されてディスク状基盤の反りが防止されるワ へ、実 施 例 一!g1図(JIJは、情報が記録され比表面とは反対
側のディスク状基盤+11の表面に反り防止層i5+が
設けられtディスクの例?示している。この実施例は、
ディスクの反りに対して有効であると共に、ディスクの
情報読出し表面(続出しレーザビームが照射される側の
表面〕に付く傷?防止するという効果も有するワポリカ
ーポネートにてディスク状基盤?形成した場合、その表
面にすり傷が付き易いという欠点かめるが、反り防止層
+51として表面硬度の高い材料を選ぶことにエリ、こ
の欠点を抽うことが出来るっ保護層(31と反り防止層
151とは同じ材料である必要框ないり保護層+a+げ
主にアルミニウム反IN模やピウトに対する保護を目的
とするものであり1反り防止層(51μ、表面硬度が高
く、且つ保護層131ケデイスク状基盤11+に添着す
ることによるディスク状基盤(11の反り?打消丁もの
であれば良いう反り防止層(5)の材料としては、例え
ば、紫外線硬化型のアクリル系ハードコート削、シリコ
ン系ハードコート剤、ボガラス等が使用できる。
On the other hand, if an anti-warp layer is provided between the reflective film and the protective layer, the stress generated in the frame and the protective layer will be buffered by the anti-warp layer and the disk-shaped substrate will be prevented from warping. , Implementation example 1! Figure g1 (JIJ shows an example of a t-disk in which a warp prevention layer i5+ is provided on the surface of the disk-shaped base +11 on the side opposite to the specific surface where information is recorded.
A disk-shaped base is formed using polycarbonate, which is effective against warping of the disk and also prevents scratches on the information readout surface of the disk (the surface that is irradiated with continuous laser beams). However, this drawback can be overcome by choosing a material with high surface hardness for the anti-warp layer (31 and anti-warp layer 151). This is the same material as the required frame protection layer + A + ridge.It is mainly intended for protection against aluminum anti-IN pattern and piut. Materials for the warp prevention layer (5) that can be applied to the disk-shaped base (5), such as one that counteracts the warpage of 11, include, for example, ultraviolet-curable acrylic hard coating, silicone hard coating agent, etc. , Bogaras etc. can be used.

第1図(b)i保護層(31と反射佼(2)の間に反り
防止膜(51を設けた実施例?示している□この場合に
於ける反り防止層15+の材料としては、例えば、ゴム
状又はゲル吠シリコン樹脂(商品名乗レシリコンJCR
−6101等)全使用できる。この樹脂自体に保護層と
じてに不適当であるが、変形し易い性質の為、保護Jn
131の反りが反り防止層+51に依って吸収され、デ
ィスク状基盤illにf公達されないっ即ちディスク状
基盤tl+には反りが生じ雌くなるワ 次に、本願発明の根拠となっ之実験結果について説明す
るり 表1は成形し之ま\の状移のディスク状ポリカーボネー
ト基盤(試料A)、それに皮材#を蒸着し友もの(試料
B)、更にその上に保護層ケつけtもの(試料C)、ラ
ベル?印刷した完成品(試料D)の4種類の試料の初期
の反り角度と、これら試料t−90t:で4時間放電し
次後の、反り角度を測定した結果を示しtものである。
Fig. 1(b) shows an example in which an anti-warp film (51) is provided between the protective layer (31) and the reflective shell (2) □ In this case, the material for the anti-warp layer 15+ is, for example, , rubber-like or gel-like silicone resin (product name: Resilicon JCR)
-6101 etc.) can all be used. Although this resin itself is not suitable as a protective layer, it is easily deformed, so it is difficult to apply a protective layer.
The warpage of 131 is absorbed by the warp prevention layer +51 and is not transferred to the disk-shaped substrate ll, that is, the disk-shaped substrate tl+ is warped and becomes female.Next, the experimental results that form the basis of the present invention Table 1 shows a disc-shaped polycarbonate base (sample A) in the state of being molded, a material with skin material # deposited on it (sample B), and a protective layer on top of it (sample B). Sample C), label? This figure shows the initial warp angles of four types of printed finished products (sample D) and the results of measuring the warp angles after 4 hours of discharge with these samples (t-90t).

保護層tつけることによって反りが生じること、ま之高
濡中に放置した場合の変形も保護層が影弄していること
金示している。
This clearly shows that warping occurs when the protective layer is applied, and that the protective layer also affects deformation when left in wet conditions.

λ 表2汀、ディスクの変形に対する保1)σ!層の役割ケ
確認する為に行っt実験結果を示すものである。
λ Table 2, Protection against disk deformation 1) σ! This figure shows the results of an experiment conducted to confirm the role of the layers.

ポリカーボネート基盤の信号面側(第2図に於いてB面
側]に保F!!MIk設は之場合(試料E)及びその反
対(tl、ll (A面41111 )に保護層全役け
t場合(試料F]の初期の反り角度と、これ等資料t−
75℃で168時間放置した後の反り角度を測定した結
果を示したものであるうこの表に於いて、第2図のA面
イ111から見て凸面になる変形をプラス、反対の変形
全マイナスで示している。この表から、理解できるよう
に、常に保護層金膜けt側と反対の側が凸面になること
が分る。
Protect F!!MIk on the signal side of the polycarbonate substrate (Side B in Figure 2).In this case (sample E) and on the opposite side (tl, ll (A side 41111)), a protective layer is used. Initial warp angle of case (sample F) and these materials t-
In the table showing the results of measuring the warp angle after being left at 75°C for 168 hours, the deformation that becomes convex when viewed from side A111 in Figure 2 is plus, and the opposite deformation is total. It is shown in minus. As can be seen from this table, the side opposite to the protective layer gold coating side always has a convex surface.

即ち、保護層はこの実験で使用した揮発成分のない紫外
線硬化型の材料でも硬化するとき収縮する之めポリカー
ボネート樹脂に強い収縮力を与えており、ディスクの変
形の主因となっている。もっとも樹脂の厚みは保護層が
10s足らずであるのに対して1200μ穆度ある念め
樹脂そのものに内在する歪も変形に影響するが、基本的
には保護層によって変形することを意味している。従う
てディスクの変形?小さく丁ゐためには保護層による収
縮を緩和するei!成をとる必要がある。
That is, since the protective layer shrinks when cured even with the ultraviolet curing type material without volatile components used in this experiment, it exerts a strong shrinkage force on the polycarbonate resin, and is the main cause of the deformation of the disk. However, the thickness of the resin is less than 10 seconds for the protective layer, while the thickness is 1200 μm.The strain inherent in the resin itself also affects deformation, but basically it means that the protective layer deforms. . Is the disc deformed accordingly? In order to keep it small, reduce the shrinkage caused by the protective layer! It is necessary to achieve success.

表275で放置 上記の実験結果から、本願発明の借成がディスクの反り
防止に効果があることが理解できる。
From the above experimental results, it can be seen that the borrowing of the present invention is effective in preventing disk warping.

ト、効 果 反り防止層r、保護層とは反対(1111に設けること
にエリ、ま九は反射模と保護層の間に設けるCとにより
、ディスクの反りを防止できる。更に、反り防止層を保
護層とは反対側に設は次場合、ディスクの情報読出し面
が傷付けられることを防止できるという効果もある。
Effect: The anti-warp layer (r) is the opposite of the protective layer (1111). Providing the disc on the side opposite to the protective layer also has the effect of preventing the information readout surface of the disc from being scratched in the following cases.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図に本発明に係るディスク?示す図、第2図は従来
のディスクを示す図、第3因にディスクの反りt示す図
である。
FIG. 1 shows a disk according to the present invention? FIG. 2 is a diagram showing a conventional disk, and the third factor is warping of the disk.

Claims (1)

【特許請求の範囲】[Claims] (1)一表面に情報が記録されているディスク状基盤と
、前記基盤の情報が記録されている前記表面をおおう反
射膜と、前記反射膜の表面をおおう保護層を有する光学
式情報記録ディスクであって、前記ディスク状基盤の情
報が記録されていない側の表面、若しくは前記反射膜と
前記保護層との間に対して、前記ディスク状基盤の反り
を防止する為の反り防止層が設けられていることを特徴
とする光学式情報記録ディスク。
(1) An optical information recording disk having a disk-shaped substrate on which information is recorded on one surface, a reflective film covering the surface on which information of the substrate is recorded, and a protective layer covering the surface of the reflective film. A warpage prevention layer is provided on the surface of the disk-shaped substrate on which information is not recorded or between the reflective film and the protective layer to prevent the disk-shaped substrate from warping. An optical information recording disc characterized by:
JP59186002A 1984-09-05 1984-09-05 Optical information recording disk Pending JPS6163942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59186002A JPS6163942A (en) 1984-09-05 1984-09-05 Optical information recording disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59186002A JPS6163942A (en) 1984-09-05 1984-09-05 Optical information recording disk

Publications (1)

Publication Number Publication Date
JPS6163942A true JPS6163942A (en) 1986-04-02

Family

ID=16180647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59186002A Pending JPS6163942A (en) 1984-09-05 1984-09-05 Optical information recording disk

Country Status (1)

Country Link
JP (1) JPS6163942A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01182944A (en) * 1988-01-14 1989-07-20 Sanyo Electric Co Ltd Production of optical information recording disk
WO2003021588A1 (en) * 2001-08-31 2003-03-13 General Electric Company Storage medium for data with improved dimensional stability

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58155542A (en) * 1982-03-10 1983-09-16 Toshiba Corp Information recording carrier
JPS60243835A (en) * 1984-05-17 1985-12-03 Matsushita Electric Ind Co Ltd Optical recording carrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58155542A (en) * 1982-03-10 1983-09-16 Toshiba Corp Information recording carrier
JPS60243835A (en) * 1984-05-17 1985-12-03 Matsushita Electric Ind Co Ltd Optical recording carrier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01182944A (en) * 1988-01-14 1989-07-20 Sanyo Electric Co Ltd Production of optical information recording disk
WO2003021588A1 (en) * 2001-08-31 2003-03-13 General Electric Company Storage medium for data with improved dimensional stability
US6716505B2 (en) 2001-08-31 2004-04-06 General Electric Company Storage medium for data with improved dimensional stability
CN100358027C (en) * 2001-08-31 2007-12-26 通用电气公司 Storage medium for data with improved dimensional stability

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