JPH097230A - Optical disk and its production - Google Patents

Optical disk and its production

Info

Publication number
JPH097230A
JPH097230A JP7174093A JP17409395A JPH097230A JP H097230 A JPH097230 A JP H097230A JP 7174093 A JP7174093 A JP 7174093A JP 17409395 A JP17409395 A JP 17409395A JP H097230 A JPH097230 A JP H097230A
Authority
JP
Japan
Prior art keywords
pair
radiation
adhesive layer
transparent substrates
outer peripheral
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
JP7174093A
Other languages
Japanese (ja)
Inventor
Masahide Itoigawa
昌秀 糸魚川
Shinichi Hanzawa
伸一 半澤
Mitsuhiko Sasano
光彦 笹野
Masaaki Motokawa
昌明 本川
Yoshikazu Hirai
良和 平井
Haruhisa Maruyama
治久 丸山
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.)
Pioneer Video Corp
Pioneer Corp
Original Assignee
Pioneer Video Corp
Pioneer Electronic Corp
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 Pioneer Video Corp, Pioneer Electronic Corp filed Critical Pioneer Video Corp
Priority to JP7174093A priority Critical patent/JPH097230A/en
Priority to US08/651,841 priority patent/US5759332A/en
Publication of JPH097230A publication Critical patent/JPH097230A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1445—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface heating both sides of the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B29C65/1467—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B29C66/452—Joining of substantially the whole surface of the articles the article having a disc form, e.g. making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE: To obtain a laminated optical disk having excellent heat resistance in which enough adhesion strength can be obtd. by laminating a pair of disks with a radiation-curing adhesive layer applied except for at least the peripheral part of the disk and firmly adhering the peripheral part with a UV-curing resin. CONSTITUTION: A reflecting film 2 is formed on a recording area of a substrate 1, then a UV-curing resin protective film 3 is applied all over the surface of the substrate 1, and further a radiation-curing adhesive layer 4 is formed on the recording area to obtain a pair of disks. Then the adhesive layer 4 is irradiated with radiation to develop the adhesion property. A UV-curing resin 5 is applied in an annular area on the protective film 3 where no adhesive layer 4 is formed on the one disk. After the pair of disks are laminated and pressed to be adhered with the adhesive layer 4, the resin squeezed from the disk end face is cured by irradiation of UV rays. Thereby, the obtd. laminated optical disk has excellent heat resistance and enough adhesion strength.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００２】[0002]

【０００１】[0001]

【０００３】[0003]

【産業上の利用分野】本発明は、一対のディスクを貼り
合わせてなる光ディスク及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc formed by laminating a pair of discs and a manufacturing method thereof.

【０００４】[0004]

【０００２】[0002]

【０００５】[0005]

【従来の技術】従来、ビデオディスク等の光学式ディス
クとして、図２で示すように透光性の樹脂基板２１の一
面に情報を担持するピット列又はグルーブを同心円状又
は螺旋状に形成し、その上方に反射膜２２及び保護膜２
３を順次形成した一対のディスクを、保護膜２３を相対
向させて接着剤層２４により貼り合わせた両面記録ディ
スクが知られており、ディスクの中心に設けられたセン
ターホールを照準にして、ディスクをクランプし回転さ
せて、ディスクの各面の記録領域へ読取りビームを照射
し、光学的に情報を再生する構成となっている。2. Description of the Related Art Conventionally, as an optical disc such as a video disc, as shown in FIG. 2, a pit row or groove for carrying information is formed on one surface of a translucent resin substrate 21 in a concentric or spiral shape. Above the reflective film 22 and the protective film 2
There is known a double-sided recording disc in which a pair of discs in which 3 are sequentially formed are adhered to each other with an adhesive layer 24 with the protective films 23 facing each other, and the disc is aimed by a center hole provided at the center of the disc. Is configured to be clamped and rotated to irradiate a recording beam on each surface of the disk with a reading beam to optically reproduce information.

【０００６】このような貼り合わせ型光学式ディスクで
は、その接着剤層として一般にホットメルト型粘着剤が
用いられている。In such a laminated optical disc, a hot melt type pressure-sensitive adhesive is generally used as the adhesive layer.

【０００７】[0007]

【０００３】[0003]

【０００８】[0008]

【発明が解決しようとする課題】しかしながらホットメ
ルト型粘着剤は、熱可塑性で有る為、耐熱性で劣り、熱
によりディスクの変形、又は剥がれが生じ易いという問
題があった。そこで耐熱性が良好である放射線硬化型粘
着剤をディスクの貼り合わせ用として用いることが考え
られる。放射線硬化型粘着剤は、紫外線、電子線等の放
射線の照射により硬化して粘着性を発現するが、放射線
の照射により分子構造が３重結合となり、流動性が無く
なるため、放射線の照射前の塗布された表面が粗いと十
分な接着面積が得られなくなる。よって、接着強度が不
足し、貼り合わせたディスクの端面より剥がれが生じ易
いという問題が生じる。本発明は、かかる事情に基づい
てなされたものであり、貼り合わせ端面から剥がれの生
じないような光ディスク及びその製造方法を得ることを
目的とする。However, since the hot-melt type pressure-sensitive adhesive is thermoplastic, it is inferior in heat resistance, and there is a problem that the disk is likely to be deformed or peeled off by heat. Therefore, it is possible to use a radiation-curable pressure-sensitive adhesive having good heat resistance for laminating disks. The radiation-curable pressure-sensitive adhesive is cured by irradiation with radiation such as ultraviolet rays and electron beams, and exhibits adhesiveness. However, irradiation with radiation causes the molecular structure to become a triple bond and loses fluidity. If the applied surface is rough, a sufficient adhesion area cannot be obtained. Therefore, there arises a problem that the adhesive strength is insufficient and peeling easily occurs from the end faces of the bonded disks. The present invention has been made under such circumstances, and an object of the present invention is to obtain an optical disc and a method for manufacturing the optical disc in which peeling does not occur from the bonded end face.

【０００９】[0009]

【０００４】[0004]

【００１０】[0010]

【課題を解決するための手段】請求項１記載の本発明に
かかる光ディスクでは、主面に外周部及び内周部を残し
て記録領域を有し、対向する一対の透明基板と、一対の
透明基板の対向する記録領域の間に設けられ一対の透明
基板を接着する放射線硬化型粘着剤層と、一対の透明基
板の対向する外周部間に設けられ一対の透明基板の外周
部を固着する紫外線硬化型樹脂層とを有する。According to the optical disk of the present invention as set forth in claim 1, there is a pair of transparent substrates and a pair of transparent substrates which have a recording area on the main surface while leaving an outer peripheral portion and an inner peripheral portion. A radiation-curable pressure-sensitive adhesive layer that is provided between the recording areas of the substrates facing each other and that bonds a pair of transparent substrates, and an ultraviolet ray that is provided between the opposing outer peripheral portions of the pair of transparent substrates and that fixes the outer peripheral portions of the pair of transparent substrates. And a curable resin layer.

【００１１】[0011]

【０００５】請求項２記載の本発明にかかる光ディスク
の製造方法では、主面に外周部及び内周部を残して記録
領域を有する一対の透明基板を作成する工程と、一対の
透明基板の記録領域上に放射線硬化型粘着剤層を形成
し、放射線硬化型粘着剤層に放射線を照射し、粘着性を
付与する工程と、一方の透明基板の外周部に紫外線硬化
型樹脂を環状に滴下する工程と、一対の透明基板を放射
線硬化型粘着剤層により貼り合わせる工程と、紫外線硬
化型樹脂に紫外線を照射し、硬化させ、一対の透明基板
の外周部を固着する工程とを有する。In the optical disc manufacturing method according to the second aspect of the present invention, a step of forming a pair of transparent substrates having a recording area with an outer peripheral portion and an inner peripheral portion left on the main surface, and recording of the pair of transparent substrates. A step of forming a radiation-curable pressure-sensitive adhesive layer on the area, irradiating the radiation-curable pressure-sensitive adhesive layer with radiation to impart tackiness, and dropping the ultraviolet-curable resin annularly on the outer peripheral portion of one transparent substrate. The method includes a step, a step of bonding a pair of transparent substrates with a radiation-curable pressure-sensitive adhesive layer, and a step of irradiating an ultraviolet-curable resin with ultraviolet rays to cure the resin and fixing the outer peripheral portions of the pair of transparent substrates.

【００１２】[0012]

【０００６】[0006]

【００１３】[0013]

【作用】一対の透明基板の対向する記録領域間の放射線
硬化型粘着剤層は、粘着性を保持し、及び外周部間の紫
外線硬化型樹脂層は硬化して一対の透明基板を接着して
いるので、ディスク変形の応力を吸収すると共に貼り合
わせ端部で強固に固着される。The radiation-curable pressure-sensitive adhesive layer between the recording areas of the pair of transparent substrates facing each other retains tackiness, and the ultraviolet-curable resin layer between the outer peripheral portions is cured to bond the pair of transparent substrates. As a result, the stress of disk deformation is absorbed and it is firmly fixed at the bonding end.

【００１４】[0014]

【０００７】[0007]

【００１５】[0015]

【実施例】以下に本発明の一実施例を図１に基づいて詳
細に説明する。本実施例の光ディスクは、一対のディス
クを貼り合わせた構成となっている。まず、主面に外周
部及び内周部を除いて微細な凹凸による情報を表すピッ
ト又はグルーブが形成された記録領域を有する一対の透
明基板１を射出成形等によって作製し、その後外周部及
び内周部を除いた記録領域上にアルミニウム等からなる
反射膜２を形成し、さらに透明基板の内周部、外周部及
び記録領域上を覆うように紫外線硬化型樹脂等からなる
保護膜３を形成して一対のディスクを得る。尚、透明基
板１は、ポリメチルメタクリレート（ＰＭＭＡ）、ポリ
カーボネート（ＰＣ）等の合成樹脂板又はガラス板から
なり、厚さ０．２〜０．８ｍｍ、例えば０．６ｍｍ厚の
円形基板である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIG. The optical disc of this embodiment has a structure in which a pair of discs are bonded together. First, a pair of transparent substrates 1 having a recording area in which pits or grooves representing information based on fine irregularities are formed on the main surface except the outer peripheral portion and the inner peripheral portion are manufactured by injection molding or the like, and then the outer peripheral portion and the inner peripheral portion are formed. A reflective film 2 made of aluminum or the like is formed on the recording area excluding the peripheral portion, and a protective film 3 made of an ultraviolet curable resin or the like is further formed so as to cover the inner peripheral portion, the outer peripheral portion and the recording area of the transparent substrate. To obtain a pair of discs. The transparent substrate 1 is made of a synthetic resin plate such as polymethylmethacrylate (PMMA) or polycarbonate (PC) or a glass plate, and is a circular substrate having a thickness of 0.2 to 0.8 mm, for example, 0.6 mm.

【００１６】[0016]

【０００８】次に図１（ａ）に示すように、内周部及び
外周部を除いて保護膜３上に数十ミクロン厚の放射線硬
化型粘着剤層４を、スクリーン印刷法により形成する。
放射線硬化型粘着剤はアクリルオリゴマーを主成分と
し、ゴム状ポリマー、粘着付与剤を必須成分として含
み、揮発性溶剤を含有しないもので室温（２０℃）未硬
化状態で５０，０００ｃｐｓ以下、例えば２１，５００
ｃｐｓの粘度を有するもの、例えばセメダイン社製「Ｃ
Ｔ−１１０Ｋ１０」等が適している。次に図１（ｂ）に
示すように放射線硬化型粘着剤層４に所定量の放射線を
照射し、液体状態から硬化させ粘着性を発現させる。Next, as shown in FIG. 1A, a radiation-curable pressure-sensitive adhesive layer 4 having a thickness of several tens of microns is formed on the protective film 3 except for the inner peripheral portion and the outer peripheral portion by a screen printing method.
The radiation-curable pressure-sensitive adhesive contains an acrylic oligomer as a main component, a rubber-like polymer and a tackifier as essential components, does not contain a volatile solvent, and is 50,000 cps or less in an uncured state at room temperature (20 ° C.), for example, 21 , 500
Those having a viscosity of cps, for example "C manufactured by Cemedine Co.
T-110K10 "and the like are suitable. Next, as shown in FIG. 1 (b), the radiation-curable pressure-sensitive adhesive layer 4 is irradiated with a predetermined amount of radiation to cure from the liquid state and develop the tackiness.

【００１７】[0017]

【０００９】次いで図１（ｃ）に示すように一方のディ
スクの放射線硬化型粘着剤層４が形成されていない保護
膜３上の内周部及び外周部に液状の紫外線硬化型樹脂５
を環状に滴下する。紫外線硬化型樹脂５は、多官能アク
リレートモノマーを主成分とし、室温（２０℃）未硬化
状態で５３０ｃｐｓの粘度を有するもの、例えば大日本
インキ化学工業（株）社製「ダイキュアクリア ＳＤ−
３０１」等が適している。Then, as shown in FIG. 1 (c), a liquid ultraviolet-curable resin 5 is formed on the inner and outer peripheral portions of the protective film 3 of one of the disks on which the radiation-curable adhesive layer 4 is not formed.
Is dropped in a ring. The UV curable resin 5 contains a polyfunctional acrylate monomer as a main component and has a viscosity of 530 cps in an uncured state at room temperature (20 ° C.), for example, “DICURE CLEAR SD-” manufactured by Dainippon Ink and Chemicals, Inc.
301 ”and the like are suitable.

【００１８】[0018]

【００１０】次に図１（ｄ）に示すように一対のディス
クを対向させて加圧し、放射線硬化型粘着剤層４により
貼り合わせた後、内周部、外周部及び外周部からあふれ
でて貼り合わせ端面を覆う部分の紫外線硬化型樹脂に紫
外線を照射し、硬化させることにより、一対のディスク
は内周部、外周部で強固に固着されることになる。Next, as shown in FIG. 1 (d), a pair of discs are opposed to each other, pressed, and bonded by the radiation-curable pressure-sensitive adhesive layer 4, and then overflow from the inner peripheral portion, the outer peripheral portion and the outer peripheral portion. By irradiating and curing the ultraviolet curable resin in the portion covering the pasted end faces with ultraviolet light, the pair of disks are firmly fixed at the inner peripheral portion and the outer peripheral portion.

【００１９】[0019]

【００１１】上記実施例では再生専用型の貼り合わせデ
ィスクについて説明したが、記録領域上にシアニン系有
機色素、磁気光学材料、相変化型材料からなる記録層を
形成した書き込み可能なタイプの貼り合わせディスクに
対しても適用できる。In the above embodiments, the read-only type bonded disk was described, but a writable type bonded disk in which a recording layer composed of a cyanine organic dye, a magneto-optical material and a phase change material is formed on the recording area. It can also be applied to discs.

【００２０】また、貼り合わせディスクの一方を再生専
用型、他方を書き込み可能タイプとしても良い。さら
に、紫外線硬化型樹脂による固着は外周部及び貼り合わ
せ外周端面のみとしても良い。Further, one of the bonded discs may be a read-only type and the other may be a writable type. Further, the fixing by the ultraviolet curable resin may be performed only on the outer peripheral portion and the bonded outer peripheral end surface.

【００２１】[0021]

【００１２】[0012]

【００２２】[0022]

【発明の効果】以上のように本発明では、少なくとも外
周部を除いて放射線硬化型粘着剤層により、一対のディ
スクを貼り合わせると共に、外周部を紫外線硬化型樹脂
により強固に固着することにより、ディスク変形の応力
を吸収すると共に貼り合わせ外周端での剥がれを防止す
ることができる。As described above, according to the present invention, a pair of disks are bonded together by the radiation curable pressure sensitive adhesive layer except at least the outer peripheral portion, and the outer peripheral portion is firmly fixed by the ultraviolet curable resin. It is possible to absorb the stress of disk deformation and prevent peeling at the outer peripheral edge of the bonded substrate.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明における光ディスクの製造方法を示す工
程図である。FIG. 1 is a process drawing showing a method for manufacturing an optical disc according to the present invention.

【図２】従来の光ディスクの構成を示す概略側面断面図
である。FIG. 2 is a schematic side sectional view showing a configuration of a conventional optical disc.

【符号の説明】[Explanation of symbols]

１ ・・・・・ 基板 ２ ・・・・・ 反射膜 ３ ・・・・・ 保護膜 ４ ・・・・・ 放射線硬化型粘着剤層 ５ ・・・・・ 紫外線硬化型樹脂 1 ・ ・ ・ Substrate 2 ・ ・ ・ ・ ・ Reflective film 3 ・ ・ ・ Protective film 4 ・ ・ ・ ・ ・ Radiation curable adhesive layer 5 ・ ・ ・ UV curable resin

───────────────────────────────────────────────────── フロントページの続き (72)発明者 笹野 光彦 山梨県中巨摩郡田富町西花輪2680番地 パ イオニアビデオ株式会社内 (72)発明者 本川 昌明 山梨県中巨摩郡田富町西花輪2680番地 パ イオニアビデオ株式会社内 (72)発明者 平井 良和 山梨県中巨摩郡田富町西花輪2680番地 パ イオニアビデオ株式会社内 (72)発明者 丸山 治久 山梨県中巨摩郡田富町西花輪2680番地 パ イオニアビデオ株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuhiko Sasano 2680 Nishi Hanawa, Tatomi-cho, Nakakoma-gun, Yamanashi Pioneer Video Co., Ltd. (72) Inventor Masaaki Honkawa 2680 Nishi Hanawa, Tatomi-cho, Nakakoma-gun, Yamanashi Pioneer Video Incorporated (72) Inventor Yoshikazu Hirai 2680 West Hanawa, Tatomi-cho, Nakakoma-gun Yamanashi Pioneer Video Incorporated (72) Inventor Haruhisa Maruyama 2680 Nishihanawa, Tatomi-cho, Nakanima-gun Yamanashi Pioneer Video Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 主面に外周部及び内周部を残して記録領
域を有し、対向する一対の透明基板と、前記一対の透明
基板の対向する記録領域の間に設けられ一対の透明基板
を接着する放射線硬化型粘着剤層と、前記一対の透明基
板の対向する外周部間に設けられ前記一対の透明基板の
外周部を固着する紫外線硬化型樹脂層とを有する光ディ
スク。1. A pair of transparent substrates having a recording area on the main surface with an outer peripheral portion and an inner peripheral portion left, and provided between a pair of transparent substrates facing each other and the recording areas facing each other of the pair of transparent substrates. An optical disc having a radiation-curable pressure-sensitive adhesive layer for adhering to each other and an ultraviolet-curable resin layer provided between the outer peripheral portions of the pair of transparent substrates facing each other and fixing the outer peripheral portions of the pair of transparent substrates. 【請求項２】 主面に外周部及び内周部を残して記録領
域を有する一対の透明基板を作成する工程と、前記一対
の透明基板の記録領域上に放射線硬化型粘着剤層を形成
し、該放射線硬化型粘着剤層に放射線を照射し、粘着性
を付与する工程と、前記一方の透明基板の外周部に紫外
線硬化型樹脂を環状に滴下する工程と、前記一対の透明
基板を前記放射線硬化型粘着剤層により貼り合わせる工
程と、前記紫外線硬化型樹脂に紫外線を照射し、硬化さ
せ一対の透明基板の外周部を固着する工程とを有する光
ディスクの製造方法。 【０００１】2. A step of forming a pair of transparent substrates having a recording area while leaving an outer peripheral portion and an inner peripheral portion on the main surface, and forming a radiation-curable pressure-sensitive adhesive layer on the recording areas of the pair of transparent substrates. Irradiating the radiation-curable pressure-sensitive adhesive layer with radiation to impart adhesiveness, a step of annularly dropping an ultraviolet-curable resin on the outer peripheral portion of the one transparent substrate, and the pair of transparent substrates A method for manufacturing an optical disc, comprising: a step of bonding with a radiation-curable pressure-sensitive adhesive layer; and a step of irradiating the ultraviolet-curable resin with ultraviolet rays to cure the ultraviolet-curable resin and fixing the outer peripheral portions of a pair of transparent substrates. [0001]
JP7174093A 1995-05-22 1995-06-16 Optical disk and its production Pending JPH097230A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7174093A JPH097230A (en) 1995-06-16 1995-06-16 Optical disk and its production
US08/651,841 US5759332A (en) 1995-05-22 1996-05-21 Process of reproducing optical discs and optical discs produced by the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7174093A JPH097230A (en) 1995-06-16 1995-06-16 Optical disk and its production

Publications (1)

Publication Number Publication Date
JPH097230A true JPH097230A (en) 1997-01-10

Family

ID=15972537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7174093A Pending JPH097230A (en) 1995-05-22 1995-06-16 Optical disk and its production

Country Status (1)

Country Link
JP (1) JPH097230A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100469218B1 (en) * 2000-04-25 2005-01-29 마쯔시다덴기산교 가부시키가이샤 Optical disk, method for manufacturing optical disk and apparatus for manufacturing optical disk
EP1681676A2 (en) * 2002-07-04 2006-07-19 Matsushita Electric Industrial Co., Ltd. Optical data recording medium and manufacturing method for the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100469218B1 (en) * 2000-04-25 2005-01-29 마쯔시다덴기산교 가부시키가이샤 Optical disk, method for manufacturing optical disk and apparatus for manufacturing optical disk
EP1681676A2 (en) * 2002-07-04 2006-07-19 Matsushita Electric Industrial Co., Ltd. Optical data recording medium and manufacturing method for the same
EP1681676A3 (en) * 2002-07-04 2006-08-02 Matsushita Electric Industrial Co., Ltd. Optical data recording medium and manufacturing method for the same
US7195691B2 (en) 2002-07-04 2007-03-27 Matsushita Electric Industrial Co., Ltd. Optical data recording medium and manufacturing method for the same

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