JP2000318047A - Information recording medium and its manufacture - Google Patents

Information recording medium and its manufacture

Info

Publication number
JP2000318047A
JP2000318047A JP11131973A JP13197399A JP2000318047A JP 2000318047 A JP2000318047 A JP 2000318047A JP 11131973 A JP11131973 A JP 11131973A JP 13197399 A JP13197399 A JP 13197399A JP 2000318047 A JP2000318047 A JP 2000318047A
Authority
JP
Japan
Prior art keywords
recording medium
layer
information recording
adhesive
laminated
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.)
Withdrawn
Application number
JP11131973A
Other languages
Japanese (ja)
Inventor
Mutsutomo Shirai
睦智 白井
Noriyuki Ogiwara
典之 荻原
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP11131973A priority Critical patent/JP2000318047A/en
Publication of JP2000318047A publication Critical patent/JP2000318047A/en
Withdrawn legal-status Critical Current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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—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 way of applying the adhesive
    • B29C65/521—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 way of applying the adhesive by spin coating
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/342—Preventing air-inclusions
    • 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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72321—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 comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72324—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 comprising a non-plastics layer consisting of inorganic materials not provided for in B29C66/72321 - B29C66/72322
    • B29C66/72325—Ceramics
    • 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
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic 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
    • 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
    • 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
    • B29C65/485—Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components
    • 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
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/523—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 way of applying the adhesive by dipping
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a laminating type information recording medium having an adhesive layer having excellent radiating properties. SOLUTION: A silicone adhesive is maintained under a reduced pressure of 100 mmHg at least for 10 min, and degassed. The degassed adhesive spin coats surfaces of a first layer structure 200 and a second layer structure 200'. Then, the structures 200, 200' are laminated under reduced pressure so that they are adhered at an adhesive layer 13 to one another to manufacture the laminated information recording medium 100. Retention of the bubble in the adhesive layer is prevented. Even when recording and reproducing lights of an infinitesimal spot of a short wavelength are applied, the adhesive layer is satisfactorily radiated. Accordingly, rewriting durability of a recording layer is improved.

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、層構造同士を接着
剤を用いて貼り合わせることにより形成される貼り合わ
せ型情報記録媒体の製造方法に関し、さらに詳細には接
着法を改良することにより放熱性に優れた情報記録媒体
を製造することができる貼り合わせ型情報記録媒体の製
造方法及び得られた情報記録媒体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated information recording medium formed by laminating layer structures with an adhesive, and more particularly to a method for improving heat radiation by improving the bonding method. The present invention relates to a method for manufacturing a laminated information recording medium capable of manufacturing an information recording medium having excellent performance, and an obtained information recording medium.

【０００２】[0002]

【従来の技術】マルチメディア時代の到来により、音楽
や動画像、コンピュータのデータなどの大量の情報を記
録再生することが可能な媒体として光記録媒体が広く使
用されている。光記録媒体は、ＣＤやレーザーディスク
のように情報の再生だけが可能な再生専用光記録媒体、
ＣＤ−Ｒのように一度だけ記録が可能な追記型光記録媒
体、何度でもデータの書き換え消去が可能な書換型光記
録媒体に分類される。書換型光記録媒体の一種として
は、例えば光磁気記録媒体が知られている。光磁気記録
媒体は、通常、透明基板上に第１誘電体層、光磁気記録
層、第２誘電体、反射層、保護層を順次積層した構造を
有している。さらに、記録容量を一層増大するために、
上記のような積層体の一組を、保護層同士が接着剤を介
して接着するように貼り合わせた貼り合わせ型の光磁気
記録媒体もまた知られている。貼り合わせ型光磁気記録
媒体用の接着剤として、従来、ホットメルト接着剤が使
用されてきた。2. Description of the Related Art With the advent of the multimedia age, optical recording media have been widely used as media capable of recording and reproducing a large amount of information such as music, moving images, and computer data. Optical recording media are read-only optical recording media that can only reproduce information, such as CDs and laser discs.
It is classified into a write-once optical recording medium, such as a CD-R, on which recording can be performed only once, and a rewritable optical recording medium, on which data can be rewritten and erased many times. As one type of rewritable optical recording medium, for example, a magneto-optical recording medium is known. The magneto-optical recording medium generally has a structure in which a first dielectric layer, a magneto-optical recording layer, a second dielectric, a reflective layer, and a protective layer are sequentially laminated on a transparent substrate. Furthermore, in order to further increase the recording capacity,
There is also known a laminated magneto-optical recording medium in which one set of the above-mentioned laminates is laminated so that the protective layers are adhered to each other via an adhesive. Conventionally, a hot-melt adhesive has been used as an adhesive for a laminated magneto-optical recording medium.

【０００３】[0003]

【発明が解決しようとする課題】積層体同士を接着する
ためには、加熱溶融したホットメルト接着剤をローラを
用いて積層体に塗布していた。しかしながら、ローラか
ら接着剤を剥離する際に、接着剤層に凹凸が残り、この
接着剤が塗布された積層体同士を貼り合わせると、かか
る凹凸形状により接着剤層に気泡が残留していた。本発
明者の知見によると、かかる気泡が接着剤層中に存在す
ると、記録再生時に照射されたレーザ光により発生した
熱が気泡内に畜熱し易くなり、その結果、記録層の耐久
性が低下することがわかった。In order to bond the laminates together, a hot melt adhesive melted by heating has been applied to the laminates using a roller. However, when the adhesive is peeled off from the roller, irregularities remain in the adhesive layer, and when the laminates coated with the adhesive are bonded together, bubbles remain in the adhesive layer due to the irregularities. According to the findings of the present inventor, when such bubbles are present in the adhesive layer, heat generated by the laser beam irradiated during recording / reproducing becomes easier to accumulate in the bubbles, and as a result, the durability of the recording layer decreases. I found out.

【０００４】特に、近年、記録密度を向上させることを
目的として、記録・再生光を短波長化するとともに、Ｎ
Ａの大きなレンズを用いて記録・再生光のスポット径を
小さくする傾向がある。この結果、記録層の微小面積中
に一層高いエネルギーが蓄積され易くなり、記録層の耐
久性低下を防止するために記録層を含む積層体の放熱特
性を一層改善することが望まれる。In particular, in recent years, in order to improve the recording density, the wavelength of recording / reproducing light has been shortened, and
There is a tendency that the spot diameter of the recording / reproducing light is reduced by using a lens having a large A. As a result, higher energy is easily accumulated in the minute area of the recording layer, and it is desired to further improve the heat radiation characteristics of the laminate including the recording layer in order to prevent the durability of the recording layer from lowering.

【０００５】そこで、本発明の目的は、放熱性に優れた
接着層または保護層を備えた貼り合わせ型情報記録媒体
を製造することにある。本発明のさらなる目的は、耐久
性に優れた情報記録媒体を製造することにある。[0005] Therefore, an object of the present invention is to produce a laminated information recording medium provided with an adhesive layer or a protective layer excellent in heat dissipation. A further object of the present invention is to produce an information recording medium having excellent durability.

【０００６】[0006]

【課題を解決するための手段】本発明の第１の態様に従
えば、第１層構造と第２層構造とを接着剤を用いて貼り
合わせることによって情報記録媒体を製造する貼り合わ
せ型情報記録媒体の製造方法において、脱気した接着剤
を第１層構造と第２層構造の少なくとも一方の表面に塗
布し、該接着剤を介して減圧下にて第１層構造と第２層
構造を貼り合わせることを特徴とする貼り合わせ型情報
記録媒体の製造方法が提供される。According to a first aspect of the present invention, there is provided a laminated information device for producing an information recording medium by laminating a first layer structure and a second layer structure with an adhesive. In the method of manufacturing a recording medium, a degassed adhesive is applied to at least one surface of the first layer structure and the second layer structure, and the first layer structure and the second layer structure are reduced under reduced pressure via the adhesive. And a method for manufacturing a laminated information recording medium, characterized in that:

【０００７】本発明の製造方法では、第１層構造と第２
層構造を、脱気した接着剤を用いて減圧下で貼り合わせ
ているために、貼り合わせられた記録媒体の接着層中に
気泡が残留することが抑制される。それゆえ、目視可能
な程度に気泡が接着層中に残留している従来の貼り合わ
せ型情報記録媒体に比べて接着層からの放熱効果に優れ
る。本発明では、気泡の残留を抑制するために従来型の
ホットメルト接着剤を使用せずに、シリコーン樹脂、ア
クリル樹脂、エポキシ樹脂などの接着剤を使用すること
が好ましい。In the manufacturing method of the present invention, the first layer structure and the second layer structure
Since the layer structure is bonded under reduced pressure using the degassed adhesive, bubbles are suppressed from remaining in the adhesive layer of the bonded recording medium. Therefore, the heat radiation effect from the adhesive layer is superior to that of the conventional bonded information recording medium in which air bubbles remain in the adhesive layer to the extent that they can be seen. In the present invention, it is preferable to use an adhesive such as a silicone resin, an acrylic resin, or an epoxy resin instead of using a conventional hot melt adhesive in order to suppress the residual air bubbles.

【０００８】脱気した接着剤は、例えば、シリコーン樹
脂接着剤を、１００ｍｍＨｇ以下の減圧下に少なくとも
１０分間程度維持することにより調製し得る。脱気雰囲
気は、大気中でも窒素などの不活性雰囲気下でもよい。
また、第１層構造と第２層構造との貼り合わせは、気泡
の介入を防止するために、１００ｍｍＨｇ以下の減圧下
で行うことが好ましい。さらには、減圧下で、接着剤層
を塗布してもよい。The degassed adhesive can be prepared, for example, by maintaining the silicone resin adhesive under a reduced pressure of 100 mmHg or less for at least about 10 minutes. The degassing atmosphere may be air or an inert atmosphere such as nitrogen.
In addition, the first layer structure and the second layer structure are preferably bonded under a reduced pressure of 100 mmHg or less in order to prevent air bubbles from intervening. Further, the adhesive layer may be applied under reduced pressure.

【０００９】本発明の第２の態様に従えば、本発明の第
１の態様に従う製造方法により得られた貼り合わせ型情
報記録媒体が提供される。脱気条件を適宜調節すること
により貼り合わせ型情報記録媒体の接着層には直径０．
２μｍ以上の気泡が存在しないようにすることができ
る。According to a second aspect of the present invention, there is provided a bonded information recording medium obtained by the manufacturing method according to the first aspect of the present invention. By appropriately adjusting the degassing conditions, the adhesive layer of the laminated information recording medium has a diameter of 0.3 mm.
Bubbles of 2 μm or more can be prevented from being present.

【００１０】本発明の第３の態様に従えば、基板上に、
少なくとも記録層及び反射層及び保護層とを備える情報
記録媒体の製造方法において、上記保護層は、脱気した
樹脂材料を上記反射層上に塗布することによって形成さ
れてなることを特徴とする情報記録媒体の製造方法が提
供される。According to a third aspect of the present invention, on a substrate,
In a method for manufacturing an information recording medium including at least a recording layer, a reflective layer, and a protective layer, the protective layer is formed by applying a degassed resin material on the reflective layer. A method for manufacturing a recording medium is provided.

【００１１】本発明は、表面に保護層を備える情報記録
媒体の製造方法にも適用される。保護層は通常紫外線硬
化樹脂などが塗布されているが、この保護層に気泡が含
まれていると記録層からの放出される熱が情報記録媒体
の外部に放出されることが妨げられる。それゆえ、本発
明に従い、脱気した樹脂材料を用いて保護層を形成す
る。樹脂材料は、シリコーン樹脂、アクリル樹脂、エポ
キシ樹脂が好ましい。脱気した樹脂材料は、樹脂材料を
１００ｍｍＨｇ以下の減圧下に少なくとも１０分間維持
することにより得られる。さらに、上記脱気した樹脂材
料を用いて、減圧下にて反射層上に塗布するのが好まし
い。保護層は、例えば、スピンコート法により形成し得
る。The present invention is also applicable to a method for manufacturing an information recording medium having a protective layer on the surface. The protective layer is usually coated with an ultraviolet curable resin or the like. However, if the protective layer contains air bubbles, the heat released from the recording layer is prevented from being released to the outside of the information recording medium. Therefore, according to the present invention, a protective layer is formed using a degassed resin material. The resin material is preferably a silicone resin, an acrylic resin, or an epoxy resin. The degassed resin material is obtained by maintaining the resin material under a reduced pressure of 100 mmHg or less for at least 10 minutes. Further, it is preferable to apply the degassed resin material on the reflective layer under reduced pressure. The protective layer can be formed by, for example, a spin coating method.

【００１２】本発明の第４の態様に従えば、本発明の第
３の態様に従う製造方法により得られた情報記録媒体が
提供される。保護層には０．２μｍ以上の気泡が実質的
に存在せず、気泡が存在していてもその直径がほぼ０．
２μｍ未満である。According to a fourth aspect of the present invention, there is provided an information recording medium obtained by the manufacturing method according to the third aspect of the present invention. Substantially no air bubbles of 0.2 μm or more exist in the protective layer, and even if air bubbles are present, the diameter of the air bubbles is approximately 0.1 μm.
It is less than 2 μm.

【００１３】本発明の第５の態様に従えば、少なくとも
記録層を含む層構造を、接着層を介して他の層構造と貼
り合わせることにより製造される貼り合わせ型情報記録
媒体において、上記接着層中に直径が０．２μｍ以上の
気泡が実質的に存在しないことを特徴とする貼り合わせ
型情報記録媒体が提供される。According to a fifth aspect of the present invention, there is provided a laminated information recording medium manufactured by laminating a layer structure including at least a recording layer with another layer structure via an adhesive layer. There is provided a laminated information recording medium characterized by substantially no bubbles having a diameter of 0.2 μm or more in a layer.

【００１４】本発明の貼り合わせ型情報記録媒体では、
接着層に直径０．２μｍ以上の気泡が実質的に存在しな
いために、記録層中に発生するとともに接着層に伝達さ
れた熱が、接着層に蓄積されることなく、容易に放熱さ
れる。それゆえ、記録層の書き換え耐久性を低下させる
ことなく、情報記録媒体の寿命を延ばすことができる。
本明細書において、「直径０．２μｍ以上の気泡が実質
的に存在しない」とは、走査型電子顕微鏡（ＳＥＭ）
で、接着層断面を、例えば倍率１万倍にて観測した場合
に、２μｍ×２μｍ平方の観測範囲のサンプルをランダ
ムに１０サンプル観測したときに少なくとも９サンプル
には、０．２μｍ以上の大きさの気泡がなく、１０サン
プル中の１サンプルに０．２μｍ以上の大きさの気泡が
あったとしても１個以下の場合を意味する。In the bonded information recording medium of the present invention,
Since substantially no air bubbles having a diameter of 0.2 μm or more exist in the adhesive layer, heat generated in the recording layer and transmitted to the adhesive layer is easily radiated without being accumulated in the adhesive layer. Therefore, the life of the information recording medium can be extended without lowering the rewriting durability of the recording layer.
In this specification, “substantially no bubbles having a diameter of 0.2 μm or more exist” means a scanning electron microscope (SEM).
When observing the cross section of the adhesive layer at a magnification of, for example, 10,000 times, at least 9 samples obtained by randomly observing 10 samples in an observation range of 2 μm × 2 μm square have a size of 0.2 μm or more. This means that even if one of the 10 samples has bubbles of 0.2 μm or more in size, no more than one bubble is present.

【００１５】本発明の貼り合わせ型情報記録媒体におい
て、上記接着剤はシリコーン樹脂であることが好まし
い。本発明の貼り合わせ型情報記録媒体は、スポット径
が１μｍ未満のレーザ光を用いて高密度記録または再生
される情報記録媒体として好適である。なお、「スポッ
ト径」は、記録または再生光の波長λと対物レンズの開
口数ＮＡによりλ／ＮＡで決定される径とする。In the bonding type information recording medium of the present invention, the adhesive is preferably a silicone resin. The bonded information recording medium of the present invention is suitable as an information recording medium that is recorded or reproduced at a high density using a laser beam having a spot diameter of less than 1 μm. The “spot diameter” is a diameter determined by λ / NA based on the wavelength λ of the recording or reproducing light and the numerical aperture NA of the objective lens.

【００１６】[0016]

【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら説明するが、本発明はそれらに限定され
ない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

【００１７】[実施例]最初に、図１に示すように、基板
１上に、第１誘電体層３、光磁気記録層５、第２誘電体
層７及びＡｌ反射層９を順次積層した構造を有する積層
体２００を製造する。積層体２００の製造方法を以下に
説明する。[Embodiment] First, as shown in FIG. 1, a first dielectric layer 3, a magneto-optical recording layer 5, a second dielectric layer 7, and an Al reflective layer 9 were sequentially laminated on a substrate 1. A laminated body 200 having a structure is manufactured. A method for manufacturing the laminate 200 will be described below.

【００１８】最初に、ランド及びグルーブに対応する凹
凸パターンが形成されたスタンパを射出成形機の金型に
装填し、ポリカーボネート樹脂材料を金型内に射出成形
することによりポリカーボネート基板１を作製した。次
いで、得られたポリカーボネート基板１をＤＣマグネト
ロンスパッタ装置に装填し、ターゲットとしてＳｉを用
いて７×１０-3TorrのＡｒ＋Ｎ2混合ガスの下、スパッ
タリングにより第１誘電体層としてのＳｉＮｘ膜を膜厚
８０ｎｍにて成膜した。次いで、ＴｂＦｅＣｏターゲッ
ト材料を用いて５×１０-3TorrのＡｒガス雰囲気中、ス
パッタリングにより光磁気記録層５としてのＴｂＦｅＣ
ｏを膜厚２０ｎｍにて成膜した。さらに、第１誘電体層
５と同様の成膜条件にて、第２誘電体層７としてのＳｉ
Ｎｘを膜厚３０ｎｍにて成膜した。最後に、ＡｌＴｉ合
金ターゲット材料を用いて５×１０-3TorrのＡｒガス中
で、スパッタリングにより反射層９としてのＡｌＴｉを
膜厚５０ｎｍにて成膜した。こうして図１に示したよう
な積層体２００を得た。さらに、同様な操作を繰り返し
て貼り合わせ用のもう一つの積層体２００’もまた製造
した。First, a stamper on which a concavo-convex pattern corresponding to lands and grooves was formed was loaded into a mold of an injection molding machine, and a polycarbonate resin material was injection-molded into the mold to produce a polycarbonate substrate 1. Next, the obtained polycarbonate substrate 1 was loaded into a DC magnetron sputtering apparatus, and a SiNx film as a first dielectric layer was formed by sputtering under a 7 × 10 −3 Torr Ar + N 2 mixed gas using Si as a target. The film was formed with a thickness of 80 nm. Next, TbFeC as the magneto-optical recording layer 5 is formed by sputtering in a 5 × 10 −3 Torr Ar gas atmosphere using a TbFeCo target material.
o was formed to a thickness of 20 nm. Further, under the same film forming conditions as the first dielectric layer 5, Si as the second dielectric layer 7
Nx was formed to a thickness of 30 nm. Finally, AlTi as the reflective layer 9 was formed to a thickness of 50 nm by sputtering in an Ar gas of 5 × 10 −3 Torr using an AlTi alloy target material. Thus, a laminate 200 as shown in FIG. 1 was obtained. Further, the same operation was repeated to produce another laminated body 200 'for bonding.

【００１９】次いで、図２に示したように、シリコーン
樹脂Ａ及びシリコーン樹脂Ｂをそれぞれ１．１ｇを充填
した２つの容器２０ａ及び２０ｂを、真空ポンプＰで減
圧可能な真空室２４内に載置した。シリコーン樹脂Ａ
は、製品名ＳＥ９２０６Ａ（東レダウコーニングシリコ
ーン社製）として入手可能なシリコーン樹脂であり、シ
リコーン樹脂Ｂと反応する硬化剤を含む。一方、シリコ
ーン樹脂Ｂは、製品名ＳＥ９２０６Ｂ（東レダウコーニ
ングシリコーン社製）として入手可能なシリコーン樹脂
であり、シリコーン樹脂Ａと反応する硬化剤及び添加剤
を含む。真空室２４を約１００ｍｍＨｇ以下に減圧し
て、その圧力を約１時間維持してシリコーン樹脂Ａ及び
Ｂをそれぞれ脱気した。Next, as shown in FIG. 2, two containers 20a and 20b each filled with 1.1 g of silicone resin A and silicone resin B are placed in a vacuum chamber 24 which can be depressurized by a vacuum pump P. did. Silicone resin A
Is a silicone resin available under the product name SE9206A (manufactured by Toray Dow Corning Silicone Co., Ltd.) and contains a curing agent that reacts with silicone resin B. On the other hand, the silicone resin B is a silicone resin available under the product name SE9206B (manufactured by Toray Dow Corning Silicone Co., Ltd.), and contains a curing agent and an additive that react with the silicone resin A. The pressure in the vacuum chamber 24 was reduced to about 100 mmHg or less, and the pressure was maintained for about 1 hour to degas the silicone resins A and B, respectively.

【００２０】こうして脱気したシリコーン樹脂Ａ及びＢ
を、図３に示したように、供給管２８を介して混合しな
がら、ターンテーブル３２上に載置された前記の積層体
２００の反射層９上にスピンコート法により膜厚約３０
ｎｍになるように塗布した。The silicone resins A and B thus degassed
As shown in FIG. 3, while being mixed via a supply pipe 28, a film thickness of about 30 is formed on the reflective layer 9 of the laminate 200 placed on the turntable 32 by a spin coating method.
nm.

【００２１】もう一つの積層体２００’に対しても同様
の２液混合型のシリコーン樹脂のスピンコートを行っ
た。次いで、反射層９上に２液混合型のシリコーン樹脂
層１３を塗布した積層体２００同士を、室内を１００ｍ
ｍＨｇ以下に減圧した前記真空室内に移動して、減圧状
態を維持したまま、互いにシリコーン樹脂層１３同士が
接着するように貼り合わせた。貼り合わせに要した時間
は５秒間程度であった。図４に示すように、積層体２０
０及び２００’を貼り合わせた後、減圧室から取り出し
てそのまま放置して接着層１３を硬化させた。こうし
て、貼り合わせ型の光磁気記録媒体１００を得た。The same two-component type silicone resin was spin-coated on the other laminate 200 '. Next, the laminates 200 each having the two-component type silicone resin layer 13 applied on the reflective layer 9 were placed in a room 100 m apart.
After moving into the vacuum chamber where the pressure was reduced to mHg or less, the silicone resin layers 13 were bonded to each other while maintaining the reduced pressure state. The time required for bonding was about 5 seconds. As shown in FIG.
After laminating 0 and 200 ', the adhesive layer 13 was cured by taking it out of the decompression chamber and leaving it as it was. Thus, a laminated magneto-optical recording medium 100 was obtained.

【００２２】得られた光磁気記録媒体を切断して接着層
の断面をＳＥＭで倍率１万倍にて観測した。２μｍ×２
μｍ平方の観測範囲のサンプルをランダムに１０サンプ
ル観測したところ、いずれのサンプルにも０．２μｍ以
上の大きさの気泡が存在していなかった。The obtained magneto-optical recording medium was cut, and the cross section of the adhesive layer was observed with a SEM at 10,000 times magnification. 2 μm × 2
As a result of randomly observing 10 samples in the observation range of μm square, no bubble having a size of 0.2 μm or more was present in any of the samples.

【００２３】[比較例]実施例で得られた一組の積層体２
００の反射層９上に、約１２０℃に加熱流動したホット
メルト接着剤（サンスター技研Ｓ−６６５７Ｌ）をそれ
ぞれローラ塗布した後、接着剤層同士を結合することに
より一組の積層体２００を貼り合わせた。冷却して接着
剤が硬化した後、貼り合わせ型光磁気記録媒体を得た。
得られた光磁気記録媒体を切断して接着層の断面をＳＥ
Ｍで倍率１万倍にて観測した。２μｍ×２μｍ平方の観
測範囲のサンプルをランダムに１０サンプル観測したと
ころ、８つのサンプルに０．２μｍ以上の大きさの気泡
が存在していた。[Comparative Example] A set of laminates 2 obtained in the examples
After applying a hot-melt adhesive (Sunstar Giken S-6657L) heated and flown to about 120 ° C. on the reflective layer 9 of each of the rollers 00 by roller, the adhesive layers are combined to form a set of laminates 200. Stuck together. After cooling and curing of the adhesive, a laminated magneto-optical recording medium was obtained.
The obtained magneto-optical recording medium is cut, and the cross section of the adhesive layer is SE.
Observed at 10,000 × magnification at M. When 10 samples were randomly observed in an observation range of 2 μm × 2 μm square, bubbles having a size of 0.2 μm or more were present in eight samples.

【００２４】上記実施例では、貼り合わせ型情報記録媒
体を例に挙げて説明してきたが、第１積層体の反射層上
に保護層を設け、該保護層を上記のように脱気したシリ
コーン樹脂で形成することにより第１積層体からなる光
磁気記録媒体を構成してもよい。また、シリコーン樹脂
として互いに相手のシリコーン樹脂を硬化剤を含む２液
混合タイプのものを用いたが、１液タイプのシリコーン
樹脂を用いてもよい。さらに、樹脂の塗布方法はスピン
コート法以外の方法、例えば、ディップ法を用いてもよ
い。In the above embodiment, the laminated information recording medium has been described as an example. However, a protective layer is provided on the reflective layer of the first laminate, and the protective layer is degassed as described above. A magneto-optical recording medium composed of the first laminate may be formed by using a resin. Further, as the silicone resin, a two-pack type silicone resin containing a silicone resin and a curing agent is used, but a one-pack silicone resin may be used. Further, as a method of applying the resin, a method other than the spin coating method, for example, a dipping method may be used.

【００２５】また、情報記録媒体として光磁気記録媒体
を例に挙げて説明してきたが、それに限らず、貼り合わ
せ構造または単独積層体構造の相変化型記録媒体並びに
貼り合わせ構造または単独積層体構造の色素記録層を有
する記録媒体にも適用することができる。Also, a magneto-optical recording medium has been described as an example of an information recording medium, but the present invention is not limited to this. A phase-change recording medium having a laminated structure or a single laminated structure, and a laminated structure or a single laminated structure It can also be applied to a recording medium having a dye recording layer.

【００２６】[0026]

【発明の効果】本発明の情報記録媒体は、接着層または
保護層に０．２μｍ以上の気泡が実質的に存在しないた
めに、接着層または保護層を通じて記録層中に発生した
熱を有効に放熱することができ、記録層を含む情報記録
媒体の書き換え耐久性が向上する。それゆえ、特に、高
密度記録のためにスポット径が１μｍ未満のレーザ光を
用いて記録または再生される場合であっても、記録層に
熱が蓄積されることが抑制され、高密度情報記録媒体の
書き換え耐久性を向上することができる。According to the information recording medium of the present invention, since substantially no air bubbles of 0.2 μm or more exist in the adhesive layer or the protective layer, the heat generated in the recording layer through the adhesive layer or the protective layer can be effectively used. Heat can be dissipated, and the rewriting durability of the information recording medium including the recording layer is improved. Therefore, even when recording or reproduction is performed using a laser beam having a spot diameter of less than 1 μm for high-density recording, accumulation of heat in the recording layer is suppressed, and high-density information recording is performed. The rewriting durability of the medium can be improved.

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

【図１】本発明に従う光磁気記録媒体を形成するための
積層体の断面構造を示す図である。FIG. 1 is a diagram showing a sectional structure of a laminate for forming a magneto-optical recording medium according to the present invention.

【図２】実施例において、シリコーン樹脂を脱気するた
めに用いた装置構成を概念的に示す図である。FIG. 2 is a view conceptually showing a device configuration used for degassing a silicone resin in an example.

【図３】実施例において、脱気したシリコーン樹脂に反
応開始剤を添加した後、積層体の表面にスピンコートす
る様子を概念的に示す図である。FIG. 3 is a view conceptually showing how a reaction initiator is added to a degassed silicone resin and then spin-coated on the surface of a laminate in an example.

【図４】実施例に従って製造された貼り合わせ型情報記
録媒体の概略構造を示す断面図である。FIG. 4 is a cross-sectional view showing a schematic structure of a bonded information recording medium manufactured according to an example.

【符号の説明】[Explanation of symbols]

１ 基板 ３ 第１誘電体層 ５ 光磁気記録層 ７ 第２誘電体層 ９ 反射層 １３ シリコーン樹脂接着層 ２０ 容器 Ａ，Ｂ シリコーン樹脂 ２４ 真空室 Ｐ 減圧ポンプ ３２ ターンテーブル １００ 光磁気記録媒体 ２００ 第１積層体 ２００’ 第２積層体 Reference Signs List 1 substrate 3 first dielectric layer 5 magneto-optical recording layer 7 second dielectric layer 9 reflective layer 13 silicone resin adhesive layer 20 container A, B silicone resin 24 vacuum chamber P decompression pump 32 turntable 100 magneto-optical recording medium 200 1 laminated body 200 '2nd laminated body

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｌ 17:00 Ｆターム(参考） 4F211 AA28 AA33 AD03 AD08 AD20 AG01 AG03 AH38 AM28 TA03 TC02 TD11 TH02 TH27 TN42 TN59 TN60 TQ07 4J040 DF041 EC001 EK031 LA08 NA21 PA25 PA35 5D029 LA05 RA28 5D075 EE03 FG04 FG05 GG16 5D121 AA04 AA07 EE21 EE28 FF03 FF09 FF13 GG20 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B29L 17:00 F term (Reference) 4F211 AA28 AA33 AD03 AD08 AD20 AG01 AG03 AH38 AM28 TA03 TC02 TD11 TH02 TH27 TN42 TN59 TN60 TQ07 4J040 DF041 EC001 EK031 LA08 NA21 PA25 PA35 5D029 LA05 RA28 5D075 EE03 FG04 FG05 GG16 5D121 AA04 AA07 EE21 EE28 FF03 FF09 FF13 GG20

Claims (10)

【特許請求の範囲】[Claims] 【請求項１】 第１層構造と第２層構造とを接着剤を用
いて貼り合わせることによって情報記録媒体を製造する
貼り合わせ型情報記録媒体の製造方法において、 脱気した接着剤を第１層構造と第２層構造の少なくとも
一方の表面に塗布し、該接着層を介して、減圧下で、第
１層構造と第２層構造を貼り合わせることを特徴とする
貼り合わせ型情報記録媒体の製造方法。1. A method for manufacturing a laminated information recording medium for manufacturing an information recording medium by laminating a first layer structure and a second layer structure using an adhesive, comprising: A laminated information recording medium, which is applied to at least one surface of a layered structure and a second layered structure, and the first layered structure and the second layered structure are laminated under reduced pressure via the adhesive layer. Manufacturing method. 【請求項２】 脱気した接着剤は、シリコーン樹脂から
なる接着剤を、１００ｍｍＨｇ以下の減圧下に少なくと
も１０分間維持することにより得られた接着剤であるこ
とを特徴とする請求項１に記載の貼り合わせ型情報記録
媒体の製造方法。2. The degassed adhesive is an adhesive obtained by maintaining an adhesive made of a silicone resin under a reduced pressure of 100 mmHg or less for at least 10 minutes. Of manufacturing a laminated type information recording medium. 【請求項３】 １００ｍｍＨｇ以下の減圧下で第１層構
造と第２層構造を貼り合わせることを特徴とする請求項
１または２に記載の貼り合わせ型情報記録媒体の製造方
法。3. The method for manufacturing a laminated information recording medium according to claim 1, wherein the first layer structure and the second layer structure are laminated under a reduced pressure of 100 mmHg or less. 【請求項４】 請求項１に記載の方法により製造された
貼り合わせ型情報記録媒体。4. A bonded information recording medium manufactured by the method according to claim 1. 【請求項５】 基板上に、少なくとも記録層及び反射層
及び保護層とを備える情報記録媒体の製造方法におい
て、 上記保護層は、脱気した樹脂材料を上記反射層上に塗布
することによって形成されてなることを特徴とする情報
記録媒体の製造方法。5. A method for manufacturing an information recording medium comprising at least a recording layer, a reflective layer and a protective layer on a substrate, wherein the protective layer is formed by applying a degassed resin material on the reflective layer. A method for manufacturing an information recording medium, characterized by being performed. 【請求項６】 脱気した樹脂材料は、シリコーン樹脂
を、１００ｍｍＨｇ以下の減圧下に少なくとも１０分間
維持することにより得られることを特徴とする請求項５
に記載の情報記録媒体の製造方法。6. The degassed resin material is obtained by maintaining the silicone resin under a reduced pressure of 100 mmHg or less for at least 10 minutes.
3. The method for manufacturing an information recording medium according to claim 1. 【請求項７】 請求項５に記載の方法によって製造され
た情報記録媒体。7. An information recording medium manufactured by the method according to claim 5. 【請求項８】 少なくとも記録層を含む層構造を、接着
層を介して他の層構造と貼り合わせることにより製造さ
れる貼り合わせ型情報記録媒体において、 上記接着層中に直径が０．２μｍ以上の気泡が実質的に
存在しないことを特徴とする貼り合わせ型情報記録媒
体。8. A laminated information recording medium manufactured by laminating a layer structure including at least a recording layer with another layer structure via an adhesive layer, wherein the adhesive layer has a diameter of 0.2 μm or more. Characterized in that substantially no air bubbles are present. 【請求項９】 上記接着剤が、シリコーン樹脂であるこ
とを特徴とする請求項８に記載の貼り合わせ型情報記録
媒体。9. The information recording medium according to claim 8, wherein the adhesive is a silicone resin. 【請求項１０】 スポット径が１μｍ未満のレーザ光を
用いて記録または再生される請求項８または９に記載の
貼り合わせ型情報記録媒体。10. The bonded information recording medium according to claim 8, wherein recording or reproduction is performed using a laser beam having a spot diameter of less than 1 μm.
JP11131973A 1999-05-12 1999-05-12 Information recording medium and its manufacture Withdrawn JP2000318047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11131973A JP2000318047A (en) 1999-05-12 1999-05-12 Information recording medium and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11131973A JP2000318047A (en) 1999-05-12 1999-05-12 Information recording medium and its manufacture

Publications (1)

Publication Number Publication Date
JP2000318047A true JP2000318047A (en) 2000-11-21

Family

ID=15070568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11131973A Withdrawn JP2000318047A (en) 1999-05-12 1999-05-12 Information recording medium and its manufacture

Country Status (1)

Country Link
JP (1) JP2000318047A (en)

Similar Documents

Publication Publication Date Title
JP3763763B2 (en) Manufacturing method of optical information recording medium
EP1296319B1 (en) Method of manufacturing disk substrate, and method and device for manufacturing optical disk
KR101096348B1 (en) Optical recording medium and its manufacturing method
JP2002008269A (en) Optical recording medium and method for manufacturing the same
US20030179693A1 (en) Single-sided double layer optical disc, and method and apparatus for manufacturing the same
JP2003203402A (en) Method of manufacturing optical information recording medium and optical information recording medium
CN101061541B (en) Optical disk and method for manufacturing optical disk
TW588345B (en) Optical recording medium and its manufacturing method
JP2000318047A (en) Information recording medium and its manufacture
JPH09274736A (en) Optical disk and its manufacture
JP4442423B2 (en) Manufacturing method of optical recording medium
JPH09306026A (en) Optical disk and formation of light transmissible layer of optical disk
JPH10112081A (en) Method for sticking optical disk and sticking device and optical disk formed by this method
JPH04212732A (en) Optical recording medium and production thereof
JP2551995B2 (en) Optical memory device
JP3344696B2 (en) optical disk
JPS63273230A (en) Optical recording medium
JP2003242694A (en) Method for manufacturing optical recording medium
JP2008186509A (en) Optical information recording medium and its manufacturing method
JPH10222883A (en) Sticking type optical disk and its manufacture
JP2003217195A (en) Method for manufacturing optical recording medium and manufacturing apparatus thereof
JPH087336A (en) Optical disk and its manufacture
JP2003030908A (en) Information recording medium and method for manufacturing the same
JPH09306041A (en) Production of sticking type optical recording medium
JPS63133335A (en) Production of aluminum substrate for optical disk with heat resistant groove layer

Legal Events

Date Code Title Description
A300 Application deemed to be withdrawn because no request for examination was validly filed

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20060801