JPS60239950A - Optical information recording medium - Google Patents

Optical information recording medium

Info

Publication number
JPS60239950A
JPS60239950A JP59095604A JP9560484A JPS60239950A JP S60239950 A JPS60239950 A JP S60239950A JP 59095604 A JP59095604 A JP 59095604A JP 9560484 A JP9560484 A JP 9560484A JP S60239950 A JPS60239950 A JP S60239950A
Authority
JP
Japan
Prior art keywords
dye
optical information
information recording
recording medium
films
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
JP59095604A
Other languages
Japanese (ja)
Inventor
Michiharu Abe
通治 安倍
Hideaki Oba
大庭 秀章
Tsutomu Sato
勉 佐藤
Masaaki Umehara
正彬 梅原
Yutaka Ueda
裕 上田
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP59095604A priority Critical patent/JPS60239950A/en
Publication of JPS60239950A publication Critical patent/JPS60239950A/en
Pending legal-status Critical Current

Links

Classifications

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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To prevent deterioration of a dye for a long period of time as a result of intrusion of oxygen in air therein and to obtain an optical information recording medium having improved optical stability, long life and high reliability by sealing a non-oxidizing gas into the hermetic space between two sheets of the substrates formed with the dye films which are recording layers on the inside. CONSTITUTION:The dye films 2 consisting of (mero)cyanine dye, triallyl methane dye, etc. are formed on one sides of transparent substrates 1, 1 consisting of glass, plastic, etc. A non-oxidizing gas such as methane butane, CO2, ethylene, propylene or Ar is sealed into a hermetic space 4 in the stage of superposing such films 2, 2 to face each other and manufacturing an optical information recording disk having the space 4 via a spacer 3. The deterioration of the recording layers 2 which are the dye films as a result of photooxidation is thus prevented and the optical information recording medium having >=100 times higher durability than the conventional medium is obtd.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は気体封入構造を有する光情報記録媒体に関する
。さらに詳しくは、本発明はレーザビームにより直接記
録し反射光の変化によって情報再生を行なう方法に使用
される光情報記録媒体に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical information recording medium having a gas-filled structure. More specifically, the present invention relates to an optical information recording medium used in a method of directly recording with a laser beam and reproducing information by changing reflected light.

〔従来技術〕[Prior art]

これまで本発明者は有機色素薄膜を有する光情報記録媒
体を種々提案している(例えば特開昭57−21263
9号、特開昭58−105442号、特開昭58−11
2790号など参照)。 このような色素薄膜は従来の
金属薄膜などに比べて製造が容易であり且つ記録特性が
すぐれているという特徴を有するものであるが、空気中
の酸素が存在する条件下で太陽光あるいは再生レーザ光
を照射すると記録層の色素が退色し長期保存性に欠ける
という問題があった。そこで、その対策として色素薄膜
を空間を介して対向配置させてなる封止構造(いわゆる
サンドイッチ構造)とすることが提案されている。しか
しながら、接着部を通して空間に空気中の酸素が侵入し
長期的には色素が劣化してしまう結果となり必ずしも満
足のいく対策ではなかった。
Until now, the present inventor has proposed various optical information recording media having organic dye thin films (for example, Japanese Patent Laid-Open No. 57-21263
No. 9, JP-A-58-105442, JP-A-58-11
(See No. 2790, etc.). Such dye thin films are easier to manufacture and have better recording properties than conventional metal thin films, but they do not absorb sunlight or playback laser light in the presence of oxygen in the air. There was a problem in that the dye in the recording layer discolored when exposed to light, resulting in a lack of long-term storage stability. Therefore, as a countermeasure to this problem, it has been proposed to use a sealing structure (so-called sandwich structure) in which dye thin films are arranged facing each other with a space in between. However, oxygen in the air enters the space through the bonded portion, resulting in the deterioration of the dye over the long term, and this is not necessarily a satisfactory measure.

〔目 的〕〔the purpose〕

本発明は上記問題に鑑みてなされたものであつて、その
目的は光反射吸収性色素膜を有する光情報記録媒体にお
いて色素膜の耐光安定性を向上させることである。
The present invention has been made in view of the above problems, and its purpose is to improve the light resistance stability of a dye film in an optical information recording medium having a light-reflecting and absorbing dye film.

〔構 成〕〔composition〕

上記目的を達成するために、本発明は封止構造を有する
光情報記録媒体の密閉空間内に非酸化性気体を封入し色
素の酸素による光劣化を抑制することにある。すなわち
、本発明の光情報記録媒体は2枚の基板のうち少なくと
も1枚の基板上に色素膜を有する各基板を、該色素膜が
内側になるように空間を介して対向配置し封止構造とし
かくして形成された密閉空間に非酸化性気体を封入させ
たことを特徴とするものである。
In order to achieve the above object, the present invention is to suppress photodeterioration of a dye due to oxygen by sealing a non-oxidizing gas in a sealed space of an optical information recording medium having a sealed structure. That is, the optical information recording medium of the present invention has a sealing structure in which the substrates each having a dye film on at least one of the two substrates are arranged facing each other with a space in between so that the dye film is on the inside. The device is characterized in that a non-oxidizing gas is sealed in the closed space thus formed.

本発明に用いることのできる非酸化性気体の代表例とし
ては、メタン、エタン、n−プロパン、イソプロパン、
n−ブタン、イソブタン、アレン、アセチレン、アリレ
ン、α−ブチレン、r−ブチレン、炭酸ガス、−酸化炭
素、ジメチルエーテル、エチレン、ホルムアルデヒド、
ケテン、アミノメタン、プロピレン、メチルクロライド
、メチルフルオライド、メチルナイトライド、メチルフ
ォスフイン、ビニルクロライド、アンモニア、アンチモ
ナスハイドライド、アルゴン、ホロンフルオライド、ホ
ロンアイオダイド、クリプトン、二酸化窒素、−酸化窒
素、フォスフインなどをあげることができるが、色素膜
記録層中の色素に悪影響を与えないものであればその他
の非酸化性気体もなんら制約なく用いることもできる。
Representative examples of non-oxidizing gases that can be used in the present invention include methane, ethane, n-propane, isopropane,
n-butane, isobutane, allene, acetylene, arylene, α-butylene, r-butylene, carbon dioxide, carbon oxide, dimethyl ether, ethylene, formaldehyde,
Ketene, aminomethane, propylene, methyl chloride, methyl fluoride, methyl nitride, methylphosphine, vinyl chloride, ammonia, antimonas hydride, argon, holon fluoride, holon iodide, krypton, nitrogen dioxide, -nitrogen oxide, Examples include phosphine, but other non-oxidizing gases may also be used without any restrictions as long as they do not adversely affect the dye in the dye film recording layer.

以下に図面を参照して本発明の構成を詳細に説明する。The configuration of the present invention will be explained in detail below with reference to the drawings.

第1図は本発明の記録媒体の一例であって、2枚の透明
基板1,1は透明材料例えばガラス、プラスチックなど
でできている。各基板の厚さは通常1.2w8度である
が、任意に選択することができる。基板の形状は円形に
限らず正方形、長方形、三角形、多角形その他種々の形
状にしてもよい。円形の場合は直径が通常10〜35儒
であることが好ましい。しかし基板の大きさは用途に応
じて任意に選択できる。また、基板には案内溝またはビ
ットが形成されていてもあるいは他の処理が施されてい
てもよい。
FIG. 1 shows an example of the recording medium of the present invention, in which two transparent substrates 1, 1 are made of a transparent material such as glass or plastic. The thickness of each substrate is usually 1.2w8 degrees, but can be arbitrarily selected. The shape of the substrate is not limited to a circle, but may be a square, a rectangle, a triangle, a polygon, or other various shapes. In the case of a circular shape, it is preferable that the diameter is usually 10 to 35 degrees. However, the size of the substrate can be arbitrarily selected depending on the application. Further, the substrate may be formed with guide grooves or bits, or may be subjected to other treatments.

各透明基板1の一方の面には記録層として色素膜2が設
けられている。記録層はシアニン色素、メロシアニン色
素、トリフェニルメタン系色素、トリアリルメタン系色
素などに代表される有機色素単独またはそれらの組合せ
あるいは他の色素との組合せなどによって形成される。
A dye film 2 is provided on one surface of each transparent substrate 1 as a recording layer. The recording layer is formed using organic dyes such as cyanine dyes, merocyanine dyes, triphenylmethane dyes, triallylmethane dyes, etc., alone or in combination, or in combination with other dyes.

記録層の厚さは200〜2000X好ましくは600〜
1oooXが適当である。また、記録層の形成に 5 
− あたっては劣化防止剤、バインダー、安定化剤などこの
分野で通常知られた他の添加剤を添加することもできる
。なお、記録層である色素膜2と基板1との間には光硬
化性樹脂などの下引層が設けられていてもよい。
The thickness of the recording layer is 200~2000X, preferably 600~
1oooX is appropriate. In addition, for the formation of the recording layer 5
- Other additives commonly known in this field may also be added, such as anti-aging agents, binders, stabilizers, etc. Note that a subbing layer such as a photocurable resin may be provided between the dye film 2, which is the recording layer, and the substrate 1.

色素膜2を有する各透明基板1は各色素膜2が内側にな
るようにスに一す3,6によって空間4を介して配置さ
れている。基板1,1はスペーサ3.3と接着剤または
他の手段によって接合され封止構造とされる。空間4に
は本発明における上述したような非酸化性気体が封入さ
れ、この気体層は外部の気圧と均衡を保っている。また
、基板1,1の中心部にはディスクをドライブ装置のタ
ーンテーブル上に固定するための治具としての機能を有
する中心穴5が設けられている。上記のスは−サ3は記
録層29.2同士が接触しないようにするだめの部材で
あってその材質 6− および形状などには特に制限はない。材質め例としては
ガラス、プラスチック、金属、紙、セラミックス、布な
どをあげることができる。また、スズーサの形状は正方
形、長方形のような普通の形状に限らず多角形のような
異形形状であってもよい。なお、第1図に示す構成は両
面タイプのディスクの例であるが本発明は一方の基板の
みに記録層を有する片面タイプのディスクにも適用でき
ることはもちろんである。
Each of the transparent substrates 1 having a dye film 2 is arranged with a space 4 interposed between the two sides 3 and 6 so that each dye film 2 is on the inside. The substrates 1, 1 are joined to the spacers 3.3 by adhesive or other means to form a sealed structure. The space 4 is filled with a non-oxidizing gas as described above in the present invention, and this gas layer maintains balance with the external atmospheric pressure. Furthermore, a center hole 5 is provided in the center of each of the substrates 1, 1, which functions as a jig for fixing a disk onto a turntable of a drive device. The above-mentioned spacer 3 is a member for preventing the recording layers 29.2 from coming into contact with each other, and there are no particular restrictions on its material 6- or shape. Examples of materials include glass, plastic, metal, paper, ceramics, cloth, etc. Furthermore, the shape of the suzusa is not limited to ordinary shapes such as squares and rectangles, but may be irregular shapes such as polygons. Although the configuration shown in FIG. 1 is an example of a double-sided disk, the present invention can of course be applied to a single-sided disk having a recording layer on only one substrate.

第2図は本発明による記録媒体についての情報の記録再
生方法を示す模式図である。集光レンズ6金用いてレー
ザ集光ビーム7を透明基板1を通して記録層2に照射す
る。強いレーザパワーで照射すると、記録層2が熱的に
変化して小孔が形成され記録が行なわれる。一方、弱い
レーザパワーで照射し反射光のレベルを検出すると記録
層上の小孔の有無として情報の再生が行なわれる。
FIG. 2 is a schematic diagram showing a method for recording and reproducing information on a recording medium according to the present invention. A condensing laser beam 7 is irradiated onto the recording layer 2 through the transparent substrate 1 using a condenser lens 6 . When irradiated with strong laser power, the recording layer 2 is thermally changed to form small holes and recording is performed. On the other hand, by irradiating with a weak laser power and detecting the level of reflected light, information is reproduced as the presence or absence of small holes on the recording layer.

〔実施例〕〔Example〕

厚さ1.0間のアクリル基板(三菱レイヨン製、アクリ
ライ)AR)に、下記構造式(I)〔日本感光色素研究
新製NK2O14)または下記構造式(■)〔日本感光
色素研究新製NK 2883 ]のシアニン色素のジク
ロルエタン溶液をスピンコードして厚さ500Xの記録
層を形成し記録媒体を作製した。
The following structural formula (I) [NK2O14 manufactured by Nippon Kanko Shiki Kenkyushin] or the following structural formula (■) [NK made by Nippon Kanko Shokuryoku Kenkyu Shin] was applied to an acrylic substrate (manufactured by Mitsubishi Rayon, Acrylai AR) with a thickness of 1.0 mm. A dichloroethane solution of a cyanine dye (2883) was spin-coded to form a recording layer with a thickness of 500×, thereby producing a recording medium.

次に、この記録媒体を2枚対向させアクリル製スは−サ
を用いて以下の表に示す気体の気流中で密封し第1図に
示す構成の記録媒体を組立てた。
Next, two of these recording media were placed facing each other and sealed using an acrylic sealant in a gas flow shown in the table below to assemble a recording medium having the structure shown in FIG. 1.

次に、上述のようにして組立てた各記録媒体に室内光で
10年間の積算光量に相当する54000ルツクスのタ
ングステン光を60時間照射した後波長790nmにお
ける光学濃度の低下率を評価しその結果を以下の表にま
とめて示す。
Next, each recording medium assembled as described above was irradiated with tungsten light of 54,000 lux, which corresponds to the cumulative light intensity over 10 years in room light, for 60 hours, and then the rate of decrease in optical density at a wavelength of 790 nm was evaluated and the results were evaluated. They are summarized in the table below.

比較例 空気 7270 実施例 1 メタン 00 〃 2 エタン 00 ’5m−プロパン 00 ’ 4 1so−プロノ署100 1 5 n−ブタン 00 ’ 6 1so−ブタ10〇  9 一 実施例7 アレン 00 1 8 アセチレン 00 19 アリレン 00 1 10 α−ブチレン 00 1 11 γ−ブチレン 00 I 12 炭酸ガス 00 #13 −酸化炭素 00 114 ジメチルエーテル 00 115 エチレン 00 # 16 ホルムアルデヒド 00 117 ケテン 00 I i8 アミノメタン 00 119 プロピレン 00 I 20 メチルクロライド 00 121 メチルフルオライド 00 122 メチルナイトライド 00 # 23 メチルフォスフイン 00 1 24 ビニルクロライド 00 I 25 アンモニア 00 # 26 .7’Gf;、%fX” イド 0010− 実施例27 アルゴン 00 〃 28 ボロ/フルオライド 00 〃29 ボロンアイオダイド 00 〃30 クリプトン 00 161 二酸化窒素 00 I 62 −酸化窒素 00 # 66 フォスフイン 00 *光学濃度の低下率←)= なお、本発明を記録層に色素を使用する場合について説
明してきたが、本発明は酸素雰囲気中で化学的および物
理的変化を生じ易い有機物および無機物あるいはその混
合物を情報記録層として用いる光情報記録媒体にも適用
できることは当業者にとって理解できることである。
Comparative example Air 7270 Example 1 Methane 00 〃 2 Ethane 00 '5m-Propane 00 ' 4 1so-Pronosign 100 1 5 N-Butane 00 ' 6 1so-Butane 100 9 Example 7 Alene 00 1 8 Acetylene 00 19 Arylene 00 1 10 α-Butylene 00 1 11 γ-Butylene 00 I 12 Carbon dioxide 00 #13 -Carbon oxide 00 114 Dimethyl ether 00 115 Ethylene 00 #16 Formaldehyde 00 117 Ketene 00 I i8 Aminomethane 00 119 Propylene 00 I 20 methyl chloride 00 121 Methyl fluoride 00 122 Methyl nitride 00 # 23 Methylphosphine 00 1 24 Vinyl chloride 00 I 25 Ammonia 00 # 26 . 7'Gf;, % f Decrease rate ←) = Although the present invention has been described with respect to the case where a dye is used in the recording layer, the present invention also describes the case where a dye is used in the information recording layer. It will be understood by those skilled in the art that the present invention can also be applied to optical information recording media used as an optical information recording medium.

〔効 果〕〔effect〕

本発明によれば記録媒体の光に対する安定性が従来技術
に比べ100倍以上向上するため記録媒体としての信頼
性を向上させることができる。
According to the present invention, the stability of the recording medium against light is improved by more than 100 times compared to the conventional technology, so that the reliability of the recording medium can be improved.

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

第1図は本発明の光情報記録媒体の一例を示す断面図で
ありそして第2図は光情報記録媒体の情報の記録再生方
法を示す模式図である。 1・・・透明基板、2・・・色素膜記録層、6・・・ス
は−サ、4・・・密閉空間、5・・・中心穴、6・・・
集光レンズ、7・・・レーザ集光ビーム。 特許出願人 株式会社 リ コ −
FIG. 1 is a sectional view showing an example of the optical information recording medium of the present invention, and FIG. 2 is a schematic diagram showing a method for recording and reproducing information on the optical information recording medium. DESCRIPTION OF SYMBOLS 1... Transparent substrate, 2... Dye film recording layer, 6... Space, 4... Closed space, 5... Center hole, 6...
Condensing lens, 7... Laser condensing beam. Patent applicant Rico Co., Ltd. −

Claims (1)

【特許請求の範囲】[Claims] 2枚の基板のうち少なくとも1枚の基板上に色素膜を有
する各基板を、該色素膜が内側になるように空間を介し
て対向配置し封止構造としかくして形成された密閉空間
に非酸化性気体を封入させたことを特徴とする、光情報
記録媒体。
The substrates each having a dye film on at least one of the two substrates are arranged facing each other with a space in between so that the dye film is on the inside, and a sealing structure is formed in which a non-oxidizing film is placed in the sealed space thus formed. An optical information recording medium characterized by enclosing a sexual gas.
JP59095604A 1984-05-15 1984-05-15 Optical information recording medium Pending JPS60239950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59095604A JPS60239950A (en) 1984-05-15 1984-05-15 Optical information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59095604A JPS60239950A (en) 1984-05-15 1984-05-15 Optical information recording medium

Publications (1)

Publication Number Publication Date
JPS60239950A true JPS60239950A (en) 1985-11-28

Family

ID=14142151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59095604A Pending JPS60239950A (en) 1984-05-15 1984-05-15 Optical information recording medium

Country Status (1)

Country Link
JP (1) JPS60239950A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591788A1 (en) * 1985-12-16 1987-06-19 Ricoh Kk OPTICAL INFORMATION RECORDING MEDIUM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591788A1 (en) * 1985-12-16 1987-06-19 Ricoh Kk OPTICAL INFORMATION RECORDING MEDIUM

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