JPH10208315A - Production of optical recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit a process stage for bonding and forming protective film on recording film with good productivity by using tow-liquid type silicone resins as adhesive for an optical recording medium formed by bonding both opposite surfaces with the adhesives. SOLUTION: The one of the two-liquid type silicone resins is applied on the recording film surface of either one of the optical recording single plates after the manufacture of two sheets of the optical recording single plates and the other of the two-light type silicone resins is applied on the recording film surface of the other optical recording single plate. Two sheets of the optical recording single plates are then brought into tight contact with each other by positioning the coating surfaces on the inner side and the two liquids are brought into contact therewith to concentrically bond two sheets of the optical recording single plates to each other. A spin coating method is adequate in the case the adhesives of several centipoises to about 1000 centipoises in the viscosity of the liquids are used as the coating application method of the two- part type silicone resins. A screen printing method is more adequate if the viscosity is higher than the range. As a result, the optical recording medium which has a high effect of preventing the corrosion of the recording film or reflection film, etc., and has an excellent long-term perceivable property is obtd.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、光記録層を有する
２枚の基板を貼り合わせてなる光記録媒体の製造方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical recording medium by bonding two substrates having an optical recording layer.

【０００２】[0002]

【従来の技術】従来より、両面記録型光記録媒体の貼り
合わせ構造として、２枚の光記録単板の記録面どうしを
接着層を介して貼り合わせるいわゆる密着貼り合わせ構
造が知られている。近年、光記録媒体の大容量化が要求
されてきており、光記録媒体基板の薄型化にともなう強
度保持のため、透明基板を貼り合わせるタイプを含め、
２枚以上の貼り合わせタイプが主流となりつつある。こ
れら貼り合わせ方法としてはホットメルトや紫外線硬化
型、光・熱併用硬化型、光・嫌気併用効果型接着剤を用
いる方法があり、中でもホットメルト接着剤が多く用い
られてきた。2. Description of the Related Art Heretofore, as a bonding structure of a double-sided recording type optical recording medium, a so-called close-contact bonding structure in which recording surfaces of two optical recording single plates are bonded via an adhesive layer has been known. In recent years, large-capacity optical recording media have been required, and in order to maintain strength with the thinning of the optical recording medium substrate, including a type in which a transparent substrate is bonded,
Two or more lamination types are becoming mainstream. As these bonding methods, there are methods using a hot melt, an ultraviolet curing type, a combination curing type of light and heat, and a combination type combination effect of light and anaerobic. Among them, a hot melt adhesive has been often used.

【０００３】従来、貼り合わせタイプの光記録媒体は、
アクリル樹脂、ポリカーボネート樹脂等の記録、再生用
レーザー光に対して透明な材質よりなる円形基板にスパ
ッタ等で記録層を成膜した後に、記録層を保護する紫外
線硬化樹脂等をコーティングした２枚の光記録媒体単板
をホットメルト型接着剤で貼り合わせたものが実用化さ
れている。Conventionally, an optical recording medium of the bonding type has
After forming a recording layer by sputtering or the like on a circular substrate made of a material transparent to a laser beam for recording and reproduction, such as an acrylic resin or a polycarbonate resin, two sheets coated with an ultraviolet curing resin or the like for protecting the recording layer. Optical recording medium veneers bonded with a hot-melt adhesive have been put to practical use.

【０００４】[0004]

【発明が解決しようとする課題】しかし、ホットメルト
型接着剤で貼り合わせる場合、加熱溶融状態で塗布する
ため、前記光記録媒体基板の耐熱性を考慮する必要があ
り、基板の形状等に悪影響を与えない温度で行う必要が
ある。例えば一般的に使用されているポリカーボネート
樹脂を用いて基板を作製した場合、塗布温度を１００℃
程度以下にする必要がある。ホットメルト型接着剤の主
成分は熱可塑性樹脂であり、接着後でも塗布温度より低
い温度で接着強度の低下が生じるため、高温での使用お
よび保存における機械特性の信頼性が低い。さらにロー
ルコーターを用いてホットメルト型接着剤を塗布する場
合には、ローラーによる記録層薄膜の損傷を防止するた
め、記録層上に保護膜を設けることが必須の条件とな
り、製造工程が複雑化して光記録媒体がコスト高になる
という不都合がある。加えて、塗布時に光記録媒体基板
に対して不均一の力及び熱を加えるため機械特性に悪影
響を与えることとなり、良品の歩留まりを上げることが
難しいという問題もある。However, when laminating with a hot-melt type adhesive, it is necessary to consider the heat resistance of the optical recording medium substrate since it is applied in a heated and melted state, which adversely affects the shape of the substrate. Must be performed at a temperature that does not give For example, when a substrate is manufactured using a generally used polycarbonate resin, the application temperature is set to 100 ° C.
It is necessary to be less than degree. The main component of the hot-melt adhesive is a thermoplastic resin, and the bonding strength is reduced at a temperature lower than the application temperature even after bonding, so that the reliability of the mechanical properties during use and storage at high temperatures is low. Furthermore, when applying a hot-melt adhesive using a roll coater, it is essential to provide a protective film on the recording layer in order to prevent the recording layer thin film from being damaged by the roller, which complicates the manufacturing process. Therefore, there is a disadvantage that the cost of the optical recording medium increases. In addition, since uneven force and heat are applied to the optical recording medium substrate at the time of coating, mechanical properties are adversely affected, and there is a problem that it is difficult to increase the yield of non-defective products.

【０００５】一方、紫外線硬化型樹脂を接着剤に使用す
る方法が特開昭６１−１１０３５０号公報、特開昭６１
−１２６６４８号公報等として提案されている。紫外線
硬化型樹脂を使用することでホットメルト型接着剤より
も高温での使用、保存に対する耐久性に優れた接着層を
形成することができ、且つホットメルト型接着では記録
層などを保護する目的で事前に紫外線硬化型樹脂による
オーバーコートを行う必要があるため、この工程を減ら
す利点もある。しかし、これらの方法は、光記録媒体基
板の薄厚化にともなう強度保持のために透明基板を貼り
合わせるタイプや半透明膜を形成した基板を貼り合わせ
るタイプには有効であるが、２枚以上の光記録媒体基板
を貼り合わせる用途には、基板に形成された記録膜を紫
外線などの硬化光がほとんど透過しないため光記録媒体
基板の全面を接着することができない。On the other hand, a method of using an ultraviolet-curable resin as an adhesive is disclosed in Japanese Patent Application Laid-Open Nos.
No. 126648. The use of UV-curable resin allows the formation of an adhesive layer that is more durable for use and storage at higher temperatures than hot-melt adhesives, and protects the recording layer, etc. with hot-melt adhesive Therefore, it is necessary to perform overcoating with an ultraviolet curable resin in advance, and thus there is an advantage that this step is reduced. However, these methods are effective for a type of bonding a transparent substrate or a type of bonding a substrate having a translucent film formed thereon for maintaining the strength accompanying the thinning of the optical recording medium substrate. In applications where an optical recording medium substrate is bonded, hardening light such as ultraviolet light hardly passes through a recording film formed on the substrate, so that the entire surface of the optical recording medium substrate cannot be bonded.

【０００６】また、光・熱併用硬化型樹脂を接着剤に使
用する方法が特開昭６１−２１７９４５号公報、特開昭
６２−６４４８号公報、特開昭６３−１０６９５０号公
報等として提案されている。光硬化部分と熱硬化部分で
硬化状態が異なりクラックが生じる原因となったり、熱
重合開始剤が記録層の腐食の原因となるため記録層上に
保護層を設けることが必須の条件となる。[0006] Further, a method of using a curable resin combined with light and heat as an adhesive has been proposed in JP-A-61-217945, JP-A-62-6448, JP-A-63-106950, and the like. ing. Since the cured state differs between the light-cured portion and the heat-cured portion, which causes cracks, and the thermal polymerization initiator causes corrosion of the recording layer, it is essential to provide a protective layer on the recording layer.

【０００７】そのため広範囲の温度領域において信頼性
が高く、紫外線等の硬化光が透過しない部分の貼り合わ
せが可能であり、さらに保護層形成の工程が省略可能な
方法として、シリコーン系樹脂を接着剤に使用する方法
が特開平５−１９８００７号公報等として提案されてい
る。しかしながら、１液型のシリコーン樹脂の場合、塗
布直後から反応が進行するため、貼り合わせるまでのオ
ープンタイムが長い場合、硬化反応が進行するために接
着力は著しく低下し、貼り合わせ後に十分な接着強度が
得られないという問題がある。また、反応速度を遅くす
ると貼り合わせまでの接着力低下は防ぐことは可能であ
るが、貼り合わせ後に十分な接着強度が発現するまで長
時間を要するため、２枚の基板にズレが生じる、再剥離
しやすい等の問題がある。[0007] As a method that can be bonded to a portion that is highly reliable over a wide temperature range and does not transmit curing light such as ultraviolet light, and that can omit the step of forming a protective layer, a silicone resin is used as an adhesive. The method used for such a method is proposed in Japanese Patent Application Laid-Open No. 5-198007. However, in the case of a one-pack type silicone resin, the reaction proceeds immediately after the application, and if the open time until bonding is long, the curing reaction proceeds, and the adhesive force is significantly reduced. There is a problem that strength cannot be obtained. In addition, if the reaction rate is reduced, it is possible to prevent a decrease in the adhesive strength until the bonding, but it takes a long time until a sufficient adhesive strength is developed after the bonding. There are problems such as easy peeling.

【０００８】本発明はかかる課題を解決するためになさ
れたものであって、その目的は、信頼性および耐久性に
優れた光記録媒体を提供すること、およびそのような光
記録媒体を歩留まり良く製造する方法を提供することに
ある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical recording medium having excellent reliability and durability, and to provide such an optical recording medium with a high yield. It is to provide a manufacturing method.

【０００９】[0009]

【課題を解決するための手段】本発明は、前記の課題を
解決するために以下の構成からなる。すなわち、本発明
の光記録媒体の製造方法は、対向する２枚の基板の少な
くとも一方の対向面上に記録層が設けてあり、両対向面
が接着剤で貼り合わされてなる光記録媒体の製造方法で
あって、該接着剤として２液型シリコーン樹脂を用いる
ことを特徴とするものである。The present invention has the following arrangement to solve the above-mentioned problems. That is, the method for manufacturing an optical recording medium according to the present invention is directed to a method for manufacturing an optical recording medium in which a recording layer is provided on at least one opposing surface of two opposing substrates and both opposing surfaces are bonded with an adhesive. A method comprising using a two-part silicone resin as the adhesive.

【００１０】[0010]

【発明の実施の形態】２液型シリコーン樹脂としては、
脱アルコールタイプのシリコーン樹脂、脱ヒドロキシル
アミンタイプのシリコーン樹脂および脱水素タイプのシ
リコーン樹脂が好ましく、これらのシリコーン樹脂の２
種類以上の混合体を用いることもできる。BEST MODE FOR CARRYING OUT THE INVENTION As a two-part silicone resin,
Preferred are dealcoholated silicone resins, dehydroxylated amine silicone resins and dehydrogenated silicone resins.
Mixtures of more than one type can also be used.

【００１１】２液型のシリコーン樹脂としての組成は、
ベースポリマー、架橋剤、ベースポリマーおよび架橋剤
を反応させるための硬化触媒、充填剤等で構成されるも
のである。ベースポリマーとしては一般には末端に官能
基を持ったポリオルガノシロキサンが、架橋剤としては
ベースポリマー同士をつなぎ架橋させて３次元ゴム弾性
体化するための３官能以上のシランまたはシロキサンが
良好に用いられる。２液型樹脂の一方にベースポリマー
および架橋剤、他方に硬化触媒が含まれ、混合あるいは
２液の接触により反応が進むタイプ、一方にベースポリ
マー、他方に架橋剤および硬化触媒が含まれ、混合ある
いは２液の接触により反応が進むタイプがあるがこれら
に限られるものではない。The composition of the two-pack type silicone resin is as follows:
It is composed of a base polymer, a crosslinking agent, a curing catalyst for reacting the base polymer and the crosslinking agent, a filler, and the like. A polyorganosiloxane having a functional group at a terminal is generally used as a base polymer, and a silane or siloxane having three or more functional groups is preferably used as a cross-linking agent for connecting base polymers to form a three-dimensional rubber elastic body. Can be One of the two-component resins contains a base polymer and a crosslinking agent, the other contains a curing catalyst, and the reaction proceeds by mixing or contacting two components. One contains a base polymer and the other contains a crosslinking agent and a curing catalyst. Alternatively, there is a type in which the reaction proceeds by contact of two liquids, but the present invention is not limited thereto.

【００１２】光記録媒体の製造方法については、２枚の
光記録単板を作製した後、いずれか一方の光記録単板の
記録膜面に２液型シリコーン樹脂の内の一方を塗布し、
他方の光記録単板の記録膜面に２液型シリコーン樹脂の
他方を塗布する。次いで塗布面を内側にして前記２枚の
光記録単板を密着し、２液を接触させ、前記２枚の光記
録単板を同心に貼り合わせる方法等を用いることができ
るがこれに限られるものではない。２液型シリコーン樹
脂の塗布方法としては液の粘度に応じてスクリーン印刷
法、スピンコート法等が用いられる。粘度が数センチポ
イズから１０００センチポイズ程度の接着剤を用いる場
合にはスピンコート法が好適であり、粘度がそれ以上の
接着剤を用いる場合にはスクリーン印刷法が好適であ
る。Regarding the method of manufacturing the optical recording medium, after preparing two optical recording veneers, one of the two-component silicone resins is applied to the recording film surface of one of the optical recording veneers,
The other of the two-component silicone resin is applied to the recording film surface of the other optical recording veneer. Next, a method in which the two optical recording veneers are brought into close contact with the application surface facing inward, two liquids are brought into contact, and the two optical recording veneers are concentrically bonded to each other can be used. Not something. As a method of applying the two-part silicone resin, a screen printing method, a spin coating method, or the like is used depending on the viscosity of the liquid. When an adhesive having a viscosity of several centipoise to about 1000 centipoise is used, a spin coating method is suitable, and when an adhesive having a viscosity higher than that is used, a screen printing method is suitable.

【００１３】シリコーン樹脂は、ホットメルト型接着剤
に比べて吸水率が格段に小さいので、記録膜または反射
膜等の腐食を防止する効果が高く、長期保存性に優れた
光記録媒体を作製することができる。またシリコーン樹
脂は、ホットメルト型接着剤に比べて高温時の接着強度
が高いので、剥離を生じにくく、信頼性および耐久性に
優れた光記録媒体を作製することができる。さらに、シ
リコーン樹脂として低温で硬化するものを用いると、基
板や記録層に熱的な悪影響を及ぼすことなく光記録媒体
の接着を行うことができる。硬化温度としては８０℃以
下が好ましく、より好ましくは６０℃以下である。ま
た、上述の方法によって光記録媒体に接着剤を塗布する
と、接着剤塗布時に記録膜または反射膜等が破壊される
ということがない。したがって、記録膜または反射膜等
の薄膜を保護膜にて覆う必要がなく、光記録媒体の製造
が容易化される。Since the silicone resin has a much lower water absorption than a hot-melt adhesive, it has a high effect of preventing corrosion of a recording film or a reflection film and produces an optical recording medium excellent in long-term storage. be able to. Further, since the silicone resin has a higher adhesive strength at a high temperature than a hot-melt type adhesive, it does not easily peel off, and an optical recording medium excellent in reliability and durability can be manufactured. Further, when a silicone resin that cures at a low temperature is used, the optical recording medium can be bonded without adversely affecting the substrate or the recording layer. The curing temperature is preferably 80 ° C. or lower, more preferably 60 ° C. or lower. Further, when the adhesive is applied to the optical recording medium by the above-described method, the recording film or the reflective film or the like is not broken at the time of applying the adhesive. Therefore, it is not necessary to cover the thin film such as the recording film or the reflective film with the protective film, and the manufacture of the optical recording medium is facilitated.

【００１４】本発明において２液型シリコーン樹脂とい
う特定の硬化型接着剤を使用するので、基板の片方は記
録層のない透明媒体であっても、また、どちらも光を全
く透過しない基板でもよい。また、２液の混合あるいは
接触により重合反応が開始する２液型シリコーン樹脂を
用いることにより、反応を制御することが可能である。
貼り合わせるまでのオープンタイムが長い場合でも、硬
化反応が進行しないために接着力の低下は起こらず、貼
り合わせ後は短時間で反応が進行するので２枚の基板に
ズレが生じたり、再剥離等は起こらず良好な貼り合わせ
光記録媒体が得られる。さらに、２液の混合、接触前の
樹脂の回収、再利用が容易であることから低コスト化が
可能である。In the present invention, since a specific curable adhesive called a two-pack type silicone resin is used, one of the substrates may be a transparent medium without a recording layer, or both may be substrates that do not transmit light at all. . In addition, the reaction can be controlled by using a two-part silicone resin in which the polymerization reaction is started by mixing or contacting the two parts.
Even if the open time until bonding is long, the curing reaction does not proceed, so the adhesive strength does not decrease, and the reaction progresses in a short time after lamination, causing the two substrates to shift or re-peel. A good bonded optical recording medium can be obtained without occurrence of the above. Further, the cost can be reduced because the mixing of the two liquids, and the recovery and reuse of the resin before the contact are easy.

【００１５】本発明は再生専用（ＲＯＭ）光記録媒体、
光磁気記録媒体や相変化光記録媒体などの書換型（ＲＡ
Ｍ）光記録媒体、部分再生専用型（ＰＲＯＭ）光記録媒
体、追記型（ＷＯＲＭ）光記録媒体などのいずれの光記
録媒体を製造する場合にも用いることができる。The present invention provides a read-only (ROM) optical recording medium,
Rewritable (RA) media such as magneto-optical recording media and phase-change optical recording media
M) It can be used for manufacturing any optical recording medium such as an optical recording medium, a partial read-only (PROM) optical recording medium, and a write-once (WORM) optical recording medium.

【００１６】[0016]

【実施例】以下、実施例により本発明をさらに説明す
る。ただし、本発明は以下の実施例により限定されるも
のではない。The present invention will be further described with reference to the following examples. However, the present invention is not limited by the following examples.

【００１７】実施例１ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。脱アルコールタイプ２液型シリコ
ーン樹脂のＡ液を一方のディスクの記録層形成面に厚さ
２０μｍになるようスクリーン印刷で塗布した。他方の
ディスクにも同様にＢ液を２０μｍ厚に塗布し、Ａ、Ｂ
液塗布面を内側にして貼り合わせた。６０℃オーブンで
１０分間加熱処理を行ったところシリコーン樹脂は全面
にわたって硬化し良好な貼り合わせ光記録媒体が得られ
た。この貼り合わせ記録媒体を９０℃、８０％Ｒ．Ｈ．
で環境試験を１０００時間行ったところ外観上の変化は
なく、記録膜の腐蝕はみられなかった。Example 1 Two optical recording media in which a recording layer was formed on the entire surface except for the outer and inner peripheral portions by sputtering on a substrate having a diameter of 120 mm and a thickness of 0.6 mm were used. Solution A of a dealcoholized two-component silicone resin was applied by screen printing to a recording layer forming surface of one of the disks to a thickness of 20 μm. Similarly, apply solution B to the other disk to a thickness of 20 μm, and
Lamination was performed with the liquid application side inside. When a heat treatment was performed in a 60 ° C. oven for 10 minutes, the silicone resin was cured over the entire surface and a good bonded optical recording medium was obtained. This bonded recording medium was heated at 90 ° C. and 80% R.F. H.
When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.

【００１８】実施例２ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。脱水素タイプ２液型シリコーン樹
脂のＡ液を一方のディスクの記録層形成面に厚さ２０μ
ｍになるようスクリーン印刷で塗布した。他方のディス
クにも同様にＢ液を２０μｍ厚に塗布し、Ａ、Ｂ液塗布
面を内側にして貼り合わせた。室温で１２時間放置した
ところシリコーン樹脂は全面にわたって硬化し良好な貼
り合わせ光記録媒体が得られた。この貼り合わせ記録媒
体を９０℃、８０％Ｒ．Ｈ．で環境試験を１０００時間
行ったところ外観上の変化はなく、記録膜の腐蝕はみら
れなかった。Example 2 Two optical recording media in which a recording layer was formed on the entire surface except for the outer and inner peripheral portions by a sputtering method on a substrate having a diameter of 120 mm and a thickness of 0.6 mm were used. Apply a 20 μm thick liquid A of a dehydrogenation type two-component silicone resin to the recording layer forming surface of one disk.
m was applied by screen printing. Similarly, the other disk was coated with the solution B to a thickness of 20 μm and bonded together with the solution A and the solution B coated inside. When left at room temperature for 12 hours, the silicone resin was cured over the entire surface and a good bonded optical recording medium was obtained. This bonded recording medium was heated at 90 ° C. and 80% R.F. H. When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.

【００１９】比較例１ 実施例１と同様に記録層を成膜した光記録媒体２枚を紫
外線硬化型接着剤を用いて貼り合わせた後紫外線照射
し、外周部と内周部の透明部分を硬化させた。外観上美
しく良好な貼り合わせ基板ができた。しかしながら、２
枚の基板を剥がしたところ外周部と内周部の透明部分は
硬化していたが、光の透過しない成膜部分は未硬化のま
まであった。Comparative Example 1 Two optical recording media having a recording layer formed thereon in the same manner as in Example 1 were bonded together using an ultraviolet-curable adhesive, and then irradiated with ultraviolet light to clear the outer and inner transparent portions. Cured. A beautiful and good bonded substrate was obtained in appearance. However, 2
When the substrates were peeled off, the transparent portions on the outer peripheral portion and the inner peripheral portion were hardened, but the film-formed portions not transmitting light remained uncured.

【００２０】比較例２ 実施例１と同様に記録層を成膜した光記録媒体２枚を光
・熱併用硬化型接着剤を用いて貼り合わせた後紫外線照
射し、外周部と内周部の透明部分を硬化させた後、９０
℃オーブンで未硬化部分を熱硬化した。外観上美しく良
好な貼り合わせ基板ができ、２枚の基板を剥がしたとこ
ろ光の透過しない成膜部分も硬化していた。しかしなが
ら、９０℃、８０％Ｒ．Ｈ．の環境試験を行ったとこ
ろ、２５０時間で記録膜部分に腐蝕が発生した。COMPARATIVE EXAMPLE 2 Two optical recording media having a recording layer formed thereon in the same manner as in Example 1 were bonded together using a curable adhesive that combines light and heat, and then irradiated with ultraviolet light. After curing the transparent part, 90
The uncured part was thermally cured in an oven at ℃. A good bonded substrate with good appearance was obtained, and when the two substrates were peeled off, the light-impermeable film was also cured. However, at 90 ° C., 80% R.F. H. When the environmental test was performed, corrosion occurred in the recording film portion in 250 hours.

【００２１】[0021]

【発明の効果】本発明の製造方法を使用することで、紫
外線など硬化光がほとんど透過しない記録膜が形成され
た２枚以上の光記録媒体基板も生産性良く貼り合わせる
ことが可能である。記録膜上に保護膜を形成する工程が
省略できる。By using the manufacturing method of the present invention, it is possible to bond two or more optical recording medium substrates on which a recording film hardly transmitting curing light such as ultraviolet light is formed with high productivity. The step of forming a protective film on the recording film can be omitted.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】対向する２枚の基板の少なくとも一方の対
向面上に記録層が設けてあり、両対向面が接着剤で貼り
合わされてなる光記録媒体の製造方法であって、該接着
剤として２液型シリコーン樹脂を用いることを特徴とす
る光記録媒体の製造方法。1. A method for manufacturing an optical recording medium, comprising: a recording layer provided on at least one opposing surface of two opposing substrates; and both opposing surfaces bonded together with an adhesive. A method for producing an optical recording medium, comprising using a two-pack type silicone resin as the material. 【請求項２】２枚の基板のうち一方に２液型シリコーン
樹脂の一方の樹脂を、他方の基板に２液型シリコーン樹
脂の他方の樹脂を塗布し、重ね合わせることを特徴とす
る請求項１記載の光記録媒体の製造方法。2. The method according to claim 1, wherein one of the two substrates is coated with one resin of the two-component silicone resin, and the other substrate is coated with the other resin of the two-component silicone resin, and superposed. 2. The method for manufacturing an optical recording medium according to 1. 【請求項３】２液型シリコーン樹脂として８０℃以下の
低温で硬化する２液型のシリコーン樹脂を用いることを
特徴とする請求項１記載の光記録媒体の製造方法。3. The method for producing an optical recording medium according to claim 1, wherein a two-part type silicone resin that cures at a low temperature of 80 ° C. or lower is used as the two-part type silicone resin. 【請求項４】２液型シリコーン樹脂として、脱アルコー
ルタイプ、脱ヒドロキシルアミンタイプ、脱水素タイプ
から選択されたシリコーン樹脂、もしくは脱アルコール
タイプ、脱ヒドロキシルアミンタイプ、脱水素タイプの
シリコーン樹脂から選択された２種類以上のシリコーン
樹脂の混合体を用いたことを特徴とする請求項１記載の
光記録媒体の製造方法。4. The two-pack type silicone resin is selected from a dealcohol type, a dehydroxylamine type and a dehydrogenate type, or a dealcohol type, a dehydroxylamine type and a dehydrogenate type silicone resin. 2. The method for manufacturing an optical recording medium according to claim 1, wherein a mixture of two or more types of silicone resins is used.