JPH077530B2 - Method for manufacturing information recording medium - Google Patents
Method for manufacturing information recording mediumInfo
- Publication number
- JPH077530B2 JPH077530B2 JP61239850A JP23985086A JPH077530B2 JP H077530 B2 JPH077530 B2 JP H077530B2 JP 61239850 A JP61239850 A JP 61239850A JP 23985086 A JP23985086 A JP 23985086A JP H077530 B2 JPH077530 B2 JP H077530B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- information recording
- recording medium
- substrate
- substrates
- 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 - Fee Related
Links
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 本発明は情報記録媒体の製造方法に関し、特に内部に空
間を有する中空構造の情報記録媒体の製造方法に関する
ものである。TECHNICAL FIELD The present invention relates to a method for manufacturing an information recording medium, and more particularly to a method for manufacturing an information recording medium having a hollow structure having a space inside.
近年、光学的に情報を記録再生でかる情報記録媒体が、
高密度、大容量記録可能であり、ランダムアクセスに優
れ、ビツト当りの価格が易いなどの理由で特に活発に研
究開発が行なわれている。従来より提案されている中空
構造の光学的記録媒体（両面記録タイプ）の模式的断面
を第２図に示す。1a,1bはレーザー光に対して透明な中
心孔を有する基板であり、ガラス、プラスチツク等で作
られる。2a,2bは基板上に成膜された記録層であり、レ
ーザー光により形状変化、相変化、磁気光学変化、分解
等をする物質より成る。記録層の上下にはごく薄い反射
層や保護層等の補助層を積層させる場合もある。記録層
2aまたは2bが成膜された２つの基板1a,1bは、それらの
内周縁及び外周縁付近にリング状に塗布されたスペーサ
ーの役割りを兼ねる接着剤3,4によって、中空部５を挟
むように貼合される。In recent years, information recording media capable of optically recording and reproducing information have been
Research and development are being actively conducted because of high density and large capacity recording, excellent random access, and easy price per bit. FIG. 2 shows a schematic cross section of an optical recording medium (double-sided recording type) having a hollow structure that has been conventionally proposed. 1a and 1b are substrates having a central hole which is transparent to laser light, and are made of glass, plastic, or the like. Reference numerals 2a and 2b are recording layers formed on the substrate, and are made of a substance that undergoes shape change, phase change, magneto-optical change, decomposition, etc. by laser light. An auxiliary layer such as a very thin reflective layer or protective layer may be laminated on the upper and lower sides of the recording layer. Recording layer
The two substrates 1a and 1b having the film 2a or 2b formed thereon are sandwiched between the hollow portions 5 by adhesives 3 and 4 which are applied in the shape of a ring around the inner and outer peripheral edges thereof and also serve as spacers. To be attached to.
こうした中空構造の光学的記録媒体においては、スペー
サーを兼ねた接着層3,4の膜圧は均一に形成することが
必要である。つまり中空部５を形成する基盤1aと1bとの
間隔にムラが生じた場合には、この記録デイスクをター
ンテーブルの上に置いてこれを回転させると面のぶれが
起り、フオーカシングやトラツキングが困難になるから
である。In such an optical recording medium having a hollow structure, it is necessary to uniformly form the film pressure of the adhesive layers 3 and 4 which also serve as spacers. In other words, if there is unevenness in the distance between the bases 1a and 1b forming the hollow portion 5, placing this recording disk on a turntable and rotating it causes surface blurring, making focusing and tracking difficult. Because.
一方、上記間隔ムラを防ぐために、特開昭59−168947号
では、フイラー状又は粒状のスペーシング部材を接着剤
に分散させ、これを基盤の内周部および外周部にリング
状に塗布し、しかる後もう一枚の基盤を貼合せて、基盤
間の間隔を一定に保持する方法が提案されている。On the other hand, in order to prevent the spacing unevenness, in JP-A-59-168947, a filler-like or granular spacing member is dispersed in an adhesive, and this is applied in a ring shape to the inner peripheral portion and the outer peripheral portion of the base, After that, another method has been proposed in which another board is attached and the space between the boards is kept constant.
しかしながら、上記提案された方法において、第３図
（ａ）に示すように基盤1aに塗布されたスペーシング部
材６入の接着剤７の厚さが均一でないと、もう一方の基
盤1bを圧着した際に第３図（ｂ）のように基盤に接着剤
が接しない部分８が出来、接着剤をそのまま硬化させる
と、すき間が生じる場合があった。またこのようなすき
間は、例えば中空部へ湿気や塵埃を侵入させ、記録層の
径時安定性に悪影響を及ぼすものであった。However, in the method proposed above, if the thickness of the adhesive 7 in the spacing member 6 applied to the substrate 1a is not uniform as shown in FIG. 3 (a), the other substrate 1b is pressure-bonded. At this time, as shown in FIG. 3 (b), a part 8 where the adhesive does not come into contact with the substrate is formed, and when the adhesive is cured as it is, a gap may occur. Further, such a gap causes moisture and dust to enter the hollow portion, for example, and adversely affects the radial stability of the recording layer.
本発明の目的は、上記従来技術を更に改良し、基盤間の
間隔を精度良く一定とすることが出来、かつ、基盤と接
着剤との間にすき間を生じることが少ない情報記録媒体
の製造方法を提供することにある。An object of the present invention is to further improve the above-mentioned conventional technique, to make it possible to keep the distance between the substrates with high precision, and to produce a small gap between the substrate and the adhesive. To provide.
本発明の上記目的は、少なくとも一方に情報記録層を設
けた１対の基盤を、スペーシング部材を分散した接着剤
によって前記記録層を内側にして貼り合せ、中空を有す
る情報記録媒体を製造する方法を、前記基盤の少なくと
も一方に前記接着剤を塗布する過程と、この基盤にもう
一方の基盤を重ね合せる過程と、重ね合せた状態でこれ
らの基盤を貼り合せ面と平行な方向に互いに運動させる
過程と、この運動後に前記接着剤を硬化せしめる過程と
から構成することによって達成される。The object of the present invention is to manufacture a hollow information recording medium by bonding a pair of substrates having an information recording layer on at least one side with the recording layer inside by an adhesive having a spacing member dispersed therein. The method comprises the steps of applying the adhesive to at least one of the bases, superimposing the other base on this base, and moving these bases in a state parallel to each other in a direction parallel to the bonding surface. This is accomplished by the steps of curing and curing the adhesive after this movement.
以下、本発明を図面に従って説明する。 The present invention will be described below with reference to the drawings.
第１図（ａ），（ｂ），（ｃ）は夫々本発明に基ずき光
学的情報菊媒体を製造する過程を示す断面模式図であ
る。まず、第１図（ａ）のように一方の面に光ビームの
照射によって情報の記録、再生が可能な光学的情報記録
層12aが形成された透明なデイスク状基盤11aの内外周に
夫々、スペーシング部材16を分散した接着剤17をリング
状に塗布する。接着剤17を塗布する方法としては、好ま
しくは定量吐出装置を用いたデイスペンサー塗布法が用
いられるが、印刷法等を用いても良い。1 (a), (b), and (c) are schematic cross-sectional views showing a process of manufacturing an optical information recording medium according to the present invention. First, as shown in FIG. 1 (a), the inner and outer peripheries of a transparent disk-shaped substrate 11a having an optical information recording layer 12a capable of recording and reproducing information by irradiating a light beam on one surface, respectively, An adhesive 17 in which the spacing member 16 is dispersed is applied in a ring shape. As a method for applying the adhesive 17, a dispenser application method using a constant-volume discharge device is preferably used, but a printing method or the like may be used.
次に、第１図（ｂ）のように、このデイスク状基盤11a
の上に、やはり光学的記録層12bが形成されたもう１枚
のデイスク状基盤11bを、記録層12bが内側となるように
重ね合せる。そして、重ね合せた２枚の基盤を、第１図
（ｃ）のように基台18と押圧部材19との間で荷重を加
え、更に荷重を加えた状態で、押圧部材19を回転させる
ことによって上方の基盤11bのみをデイスクの中心を軸
として、下方基盤11aに対してすり合せるように回転さ
せる。すると、基盤11a及び11bはスペーシング部材16に
よって、内部に中空を有して一定間隔に保持され、ま
た、接着剤17が不均一に塗布せれていたとしても、基盤
11bと接着剤17との間に生じたすき間は、上記回転運動
によって完全に消滅する。基盤を回転させる角度は通
常、相対的に10゜〜360゜の範囲で十分であるが、場合
によっては数回転させても良い。Next, as shown in FIG. 1 (b), this disk-shaped substrate 11a
Another disk-shaped substrate 11b, also having the optical recording layer 12b formed thereon, is laid on top of it so that the recording layer 12b is on the inside. Then, as shown in FIG. 1 (c), a load is applied between the base 18 and the pressing member 19 on the two superposed substrates, and the pressing member 19 is rotated while the load is further applied. Thus, only the upper base 11b is rotated about the center of the disk so as to rub against the lower base 11a. Then, the substrates 11a and 11b are held by the spacing member 16 at a constant interval with a hollow inside, and even if the adhesive 17 is applied unevenly,
The gap created between 11b and the adhesive 17 is completely eliminated by the above rotational movement. The rotation angle of the base is usually in the range of 10 ° to 360 °, but it may be several times depending on the circumstances.
そして上記過程の後、最後に接着剤17を硬化させること
によって、極めて密閉性が高く、しかも基盤間の距離が
一定の中空構造の情報記録媒体が製造出来る。Then, after the above process, by finally curing the adhesive 17, it is possible to manufacture an information recording medium having an extremely high hermeticity and a hollow structure in which the distance between the substrates is constant.
本発明の製造法で用いられる接着剤としては紫外線硬化
型、熱硬化型、二液硬化型、溶剤揮発型、湿気硬化型、
ホツトメルト型等の接着剤を用いることができる。なか
でも紫外線硬化型および二液硬化型接着剤は作業性、生
産性、の面で有利である。As the adhesive used in the production method of the present invention, an ultraviolet curable type, a thermosetting type, a two-component curing type, a solvent volatilizing type, a moisture curing type,
An adhesive such as a hot melt type adhesive can be used. Above all, the ultraviolet curable and two-component curable adhesives are advantageous in terms of workability and productivity.
なお接着剤は、塗布又は印刷に適した一般的な粘度（約
1500〜100,000cps）と、適度のチクソ性（チクソトロピ
ー）とを保持していると好ましい。又、接着剤に分散さ
せるスペーシング部材の材料としては、例えばガラス、
シリカ、金属酸化物（MgO,Al2O3）などの無機化合物の
多孔質体若しくは非多孔質体または中空体や、ポリスチ
レン、ポリエチレン、ポリプロピレン、ポリエステル、
ポリアクリル、ナイロン、シリコン樹脂などのプラスチ
ツク類などが挙げられる。ただし、接着剤に対し溶解な
いし膨潤するものは好ましくない。The adhesive has a general viscosity (approx.
(1500 to 100,000 cps) and an appropriate thixotropy (thixotropy) are preferably maintained. The material of the spacing member dispersed in the adhesive is, for example, glass,
Porous or non-porous or hollow bodies of inorganic compounds such as silica and metal oxides (MgO, Al 2 O 3 ), polystyrene, polyethylene, polypropylene, polyester,
Examples include plastics such as polyacrylic, nylon, and silicone resin. However, those that dissolve or swell in the adhesive are not preferred.
粒上部材の形状としては、球状に限らず６面体や４面体
円柱でもよいが、基盤の間にスペーサーとして一定の間
隔を保持できるように均一な大きさをもつものが好まし
い。The shape of the granular member is not limited to a spherical shape and may be a hexahedron or a tetrahedron cylinder, but it is preferable that it has a uniform size as a spacer between the bases so that a certain distance can be maintained.
粒状部材の大きさは通常は基盤の間隔と実質的に同じ大
きさとすればよい。即ち、基盤の間隔として一般には10
μｍ〜1000μｍに保持することが多いが、例えば400μ
ｍの球状体をスペーサーとして用いると基盤間の厚みも
ほぼ400μｍになるよう制御できるからである。The size of the granular member may be substantially the same as the space between the substrates. In other words, the space between the substrates is generally 10
It is often maintained at μm to 1000 μm, but for example 400 μm
This is because if a spherical body of m is used as a spacer, the thickness between the substrates can be controlled to be approximately 400 μm.
更に実施例に基づいて詳細に説明する。Further, it will be described in detail based on examples.
実施例 外径130mm、内径15mm、厚さ1.2mmのデイスク状透明ポリ
カーボネート製基盤上に波長830μｍ付近に光吸収ピー
クを有するポリメチン系染料を1000Åの厚さにスピンナ
ー塗布し記録層とした。Example A polymethine dye having a light absorption peak near a wavelength of 830 μm was spinner coated on a disk-shaped transparent polycarbonate substrate having an outer diameter of 130 mm, an inner diameter of 15 mm and a thickness of 1.2 mm to a thickness of 1000 Å to form a recording layer.
一方、紫外線硬化型接着剤（電気化学工業（株）製op−
6040）に、スペーシング部材として球状で粒径440μｍ
〜490μｍに分級したアクリル系樹脂ビーズを、重量比1
0％となるよう添加混合した。On the other hand, an ultraviolet curable adhesive (manufactured by Denki Kagaku Kogyo op-
6040) has a spherical shape as a spacing member and a particle size of 440 μm.
Acrylic resin beads classified to ~ 490μm, weight ratio 1
The mixture was added and mixed so as to be 0%.
上記のビーズが分級している接着剤をデイスペンサーに
よりこの基盤の内周及び外周付近にリング状に塗布し
た。The adhesive in which the beads were classified was applied in a ring shape around the inner and outer peripheries of the base with a dispenser.
接着剤の塗布巾は約2mm、高さは約1mm塗布された接着剤
の断面形状はほぼ半円形であった。この基盤に上述の記
録層を形成した基盤を記録層が内側となり且つ中心穴が
一致する様に位置合せして重ね、基盤全面に1Kgの圧力
を加え貼合せた。The coating width of the adhesive was about 2 mm and the height was about 1 mm. The substrate on which the above-mentioned recording layer was formed was aligned and laminated so that the recording layer was on the inside and the central holes were aligned, and a pressure of 1 Kg was applied to the entire surface of the substrate for lamination.
貼合せた後、下方の基盤を固定して、上方の基盤を荷重
を加えたまま、中心を軸にして１回転（360℃）させ、
そのまま保持して、紫外線を照射し（80mW30秒）、接着
層を兼ねたスペーサー層を硬化させた。After pasting, fix the lower board, and make one rotation (360 ° C) around the center with the upper board still loaded.
It was kept as it was and irradiated with ultraviolet rays (80 mW for 30 seconds) to cure the spacer layer also serving as the adhesive layer.
こうして得られた両面記録型光デイスクは、基盤間隔が
およそ500μｍで、厚み精度が良く、かつ、基盤とリン
グ状の接着層との間にすきまが生じずに、完全に中空部
が密閉されていた。The thus-obtained double-sided recording type optical disc had a substrate spacing of about 500 μm, good thickness accuracy, and had no gap between the substrate and the ring-shaped adhesive layer, and the hollow part was completely sealed. It was
本発明は、以上説明した実施例の他にも種々の変形が可
能である。例えば、実施例では上方の基盤のみを回転さ
せたが、下方の基盤のみを回転させる或いは両基盤を逆
方向に回転させるようにしても良い。また、回転に限ら
ず、貼り合せ面に平行な方向であれば別の運動を行なわ
せてもかまわない。また、基盤に加える荷重は、必ずし
も回転中に加える必要はなく、接着剤の硬化時に加える
ようにすることも可能である。更に、実施例では両面に
記録層を有する情報記録媒体を示したが、基盤の一方が
記録層を有さない保護基盤であるような片面の媒体を作
製する場合にも、本発明を適用することができる。ま
た、基盤の形状もデイスク状には限られない。The present invention can be variously modified in addition to the embodiments described above. For example, although only the upper substrate is rotated in the embodiment, only the lower substrate may be rotated or both substrates may be rotated in opposite directions. Further, the movement is not limited to rotation, and another movement may be performed as long as the movement is parallel to the bonding surface. Further, the load applied to the base does not necessarily have to be applied during rotation, but may be applied when the adhesive is cured. Furthermore, although the information recording medium having recording layers on both sides is shown in the examples, the present invention is also applied to the case of producing a single-sided medium in which one of the substrates is a protective substrate having no recording layer. be able to. Further, the shape of the base is not limited to the disk shape.
以上説明したように、本発明は中空構造の情報記録媒体
を製造する方法において、接着剤の硬化前に重ね合せた
基盤を貼り合せ面と平行な方向に互いに運動させるよう
にしたので、基盤間の距離が均一で、かつ、すきまのな
い完全に密閉された中空を有する情報記録媒体を製造す
ることが可能となった。As described above, according to the present invention, in the method of manufacturing the information recording medium having the hollow structure, the substrates which are stacked before the adhesive is cured are moved in a direction parallel to the bonding surface. It is possible to manufacture an information recording medium having a uniform distance and a completely closed hollow with no clearance.
第１図（ａ），（ｂ），（ｃ）は夫々本発明の製造方法
の過程を示す情報記録媒体の略断面図、第２図は従来の
情報記録媒体の構造を示す略断面図、第３図（ａ），
（ｂ）は夫々従来法における基盤と接着剤との間のすき
間の発生を示す略断面図である。 11a,11b……デイスク状基盤 12a,12b……情報記録層 16……スペーシング部材 17……接着剤、18……基台 19……押圧部材。1 (a), (b) and (c) are schematic sectional views of an information recording medium showing the steps of the manufacturing method of the present invention, and FIG. 2 is a schematic sectional view showing the structure of a conventional information recording medium. Figure 3 (a),
(B) is a schematic sectional view showing generation | occurrence | production of the clearance gap between the base | substrate and adhesive agent in the conventional method, respectively. 11a, 11b …… Disk-shaped base 12a, 12b …… Information recording layer 16 …… Spacing member 17 …… Adhesive, 18 …… Base 19 …… Pressing member.
Claims (1)
の基盤を、スペーシング部材を分散した接着剤によって
前記記録層を内側にして貼り合せ、中空を有する情報記
録媒体を製造する方法において、 前記基盤の少なくとも一方に前記接着剤を塗布する過程
と、この基盤にもう一方の基盤を重ね合せる過程と、重
ね合せた状態でこれらの基盤を貼り合せ面と平行な方向
に互いに運動させる過程と、この運動後に前記接着剤を
硬化せしめる過程とから成ることを特徴とする情報記録
媒体の製造方法。1. A method for producing an information recording medium having a hollow by laminating a pair of substrates having an information recording layer on at least one side with the recording layer inside by an adhesive having a spacing member dispersed therein. , A step of applying the adhesive to at least one of the bases, a step of superimposing another base on the base, and a step of moving the bases in a state parallel to each other in a direction parallel to a bonding surface. And a step of curing the adhesive after the exercise, a method of manufacturing an information recording medium.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239850A JPH077530B2 (en) | 1986-10-08 | 1986-10-08 | Method for manufacturing information recording medium |
| US07/088,272 US4892606A (en) | 1986-08-28 | 1987-08-24 | Optical recording medium having space therein and method of manufacturing the same |
| DE8787307566T DE3777092D1 (en) | 1986-08-28 | 1987-08-26 | METHOD FOR PRODUCING AN OPTICAL RECORDING CARRIER. |
| EP87307566A EP0268352B1 (en) | 1986-08-28 | 1987-08-26 | Method of manufacturing an optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239850A JPH077530B2 (en) | 1986-10-08 | 1986-10-08 | Method for manufacturing information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6394447A JPS6394447A (en) | 1988-04-25 |
| JPH077530B2 true JPH077530B2 (en) | 1995-01-30 |
Family
ID=17050801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61239850A Expired - Fee Related JPH077530B2 (en) | 1986-08-28 | 1986-10-08 | Method for manufacturing information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH077530B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW314621B (en) * | 1995-12-20 | 1997-09-01 | Toshiba Co Ltd | |
| JP2011222087A (en) * | 2010-04-09 | 2011-11-04 | Mitsubishi Kagaku Media Co Ltd | Manufacturing method of optical recording medium and manufacturing equipment of the same |
-
1986
- 1986-10-08 JP JP61239850A patent/JPH077530B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6394447A (en) | 1988-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |