JPH0514632B2 - - Google Patents
Info
- Publication number
- JPH0514632B2 JPH0514632B2 JP59142126A JP14212684A JPH0514632B2 JP H0514632 B2 JPH0514632 B2 JP H0514632B2 JP 59142126 A JP59142126 A JP 59142126A JP 14212684 A JP14212684 A JP 14212684A JP H0514632 B2 JPH0514632 B2 JP H0514632B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- dyes
- reflective layer
- formula
- recording medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 42
- 239000000975 dye Substances 0.000 description 17
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 4
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 3
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 3
- 150000004056 anthraquinones Chemical class 0.000 description 3
- QDLAGTHXVHQKRE-UHFFFAOYSA-N lichenxanthone Natural products COC1=CC(O)=C2C(=O)C3=C(C)C=C(OC)C=C3OC2=C1 QDLAGTHXVHQKRE-UHFFFAOYSA-N 0.000 description 3
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 3
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- DZVCFNFOPIZQKX-LTHRDKTGSA-M merocyanine Chemical compound [Na+].O=C1N(CCCC)C(=O)N(CCCC)C(=O)C1=C\C=C\C=C/1N(CCCS([O-])(=O)=O)C2=CC=CC=C2O\1 DZVCFNFOPIZQKX-LTHRDKTGSA-M 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- GABVIFRCSOXVGN-UHFFFAOYSA-N 1,2-dimethylindole;hydrochloride Chemical compound Cl.C1=CC=C2N(C)C(C)=CC2=C1 GABVIFRCSOXVGN-UHFFFAOYSA-N 0.000 description 1
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- SJEYSFABYSGQBG-UHFFFAOYSA-M Patent blue Chemical compound [Na+].C1=CC(N(CC)CC)=CC=C1C(C=1C(=CC(=CC=1)S([O-])(=O)=O)S([O-])(=O)=O)=C1C=CC(=[N+](CC)CC)C=C1 SJEYSFABYSGQBG-UHFFFAOYSA-M 0.000 description 1
- PJANXHGTPQOBST-VAWYXSNFSA-N Stilbene Natural products C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000980 acid dye Substances 0.000 description 1
- 125000004423 acyloxy group Chemical group 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 239000000981 basic dye Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000982 direct dye Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000983 mordant dye Substances 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
〔技術分野〕
本発明は反射層、透明中間層および記録層の３
層構造を有する光情報記録媒体に関する。
〔従来技術〕
光情報記録媒体の材料として必要な特性は、光
を反射することと光を吸収し光を吸収した部分で
状態変化または形状を変化させその光反射特性を
照射前後で変化させることである。そこで、従来
光情報記録媒体の記録層としては低融点金属また
は金属微粒子樹脂分散層の単層で構成されている
ものあるいは反射層が金属からなりそして吸収層
が色素からなる二層で構成されているものなどが
知られているが、いずれもＣ／Ｎおよび記録感度
などの点でいまだ充分でなかつた。
〔目的〕
本発明は上記問題に鑑みてなされたものであつ
て、その目的は高感度且つ高分解能の光情報記録
媒体を提供することにある。
〔構成〕
本発明者らは上記目的につき種々検討を行つた
ところ、記録層の膜厚を薄くするとピツト形成時
のエネルギーが小さくてすむため高感度化が実現
できること、またピツド周辺の盛り上り（いわゆ
るリム）が小さくなるためピツド間隔をつめるこ
とができて高記録密度化が実現できることに着目
し、本発明の完成に至つた。すなわち、本発明は
図に示すように光情報記録媒体を色素反射層２、
透明中間層３および金属記録層４で構成し、反射
層に適当な反射率および透過率を一方記録層に適
当な反射率をもたせそして透明中間層の厚さを
ｉ／4n（ただし、λは再生光の波長を意味しそし
てｎは透明中間層の屈折率を意味する）にするこ
とにより透明中間層３は図に示すように反射層か
ら再生光を入射させた場合反射層で反射する光ｒ
と反射層を透過し記録層で反射して戻つてきた光
r′とが干渉により相殺される反射防止構造とな
り、ピツト部５では光ｒが弱められずに反射して
くるため大きなコントラストが得られる結果反射
層および記録層の反射率は比較的低くてよいので
記録層の膜厚を薄くすることが可能となる。
本発明の光情報記録媒体は基板上に反射層、透
明中間層および記録層を順次積層してなりしかも
前記反射層が色素薄膜であり且つ前記記録層が金
属薄膜であることを特徴とするものである。
次に、図面について本発明の光情報記録媒体の
構成を説明する。
図に示すように、本発明の光情報記録媒体は基
本的には基板１の上に色素反射層２を設けさらに
その上に透明中間層３を設けさらにその上に金属
記録層４を設けたものである。基板側から記録再
生光を入射させる場合基板としてはガラス、プラ
スチツクなどの透明部材が用いられる。一方、膜
面から記録再生光を入射させる場合基本としては
上記透明部材の他に金属、セラミツクスなどの不
透明部材を用いることができる。
色素反射層は１種またはそれ以上の有機色素を
含み必要に応じて他の成分例えばバインダー、安
定剤（例えば遷移金属錯体）などを含んでいても
よい。有機色素としては本発明者等が既に提案し
ている色素例えばシアニン、メロシアニン、トリ
フエニルメタン、ナフトキノン、キサンテンおよ
びスクアリウム色素などを含めて、アゾ、スチル
ベン、フタロシアニン系の直接染料、アゾ、アン
トラキン、トリフエニルメタン、キサンテン、ア
ジン系の酸性染料、シアニン、アゾ、アジン、ト
リフエニルメタン系の塩基性系染料、アゾ、アン
トラキノン、キサンテン、トリフエニルメタン系
の媒染・酸性媒染染料、アントラキノン、インジ
ゴイド系の建染染料、アゾ、アントラキノン、フ
タロシアニン、トリフエニルメタン系の油溶染料
などが用いることができる。
本発明で用いられる上記有機色素のうちシアニ
ン色素またはメロシアニン色素が特に好ましくこ
れらは以下の式で表わされるものである。
ただし、R1およびR2は置換もしくは未置換の
アルキル基、置換もしくは未置換のアラルキル基
またはアルケニル基を示し、Z1およびZ2は置換ま
たは未置換の複素環を完成するに必要な原子群を
示し、Z3は置換もしくは未置換の５員環または６
員環を完成するに必要な原子群を示し、また前記
５員環もしくは６員環は芳香族環と縮合していて
もよく、R3は水素原子またはハロゲン原子を示
し、R4およびR5は水素原子、ハロゲン原子、ヒ
ドロキシ基、カルボキシル基、アルキル基、置換
もしくは未置換のアリール基またはアシルオキシ
基を示し、Ｘ
は酸アニオンを示し、そしてｌ、
ｍおよびｎは０または１である。
ただし、
[Technical field] The present invention consists of three layers: a reflective layer, a transparent intermediate layer, and a recording layer.
The present invention relates to an optical information recording medium having a layered structure. [Prior art] The properties necessary for the material of an optical information recording medium are to reflect light, to absorb light, and to change the state or shape of the part that absorbed the light, changing its light reflection characteristics before and after irradiation. It is. Therefore, conventionally, the recording layer of an optical information recording medium is composed of a single layer of a low-melting point metal or a metal fine particle resin dispersion layer, or it is composed of a two-layer structure in which the reflective layer is made of a metal and the absorption layer is made of a dye. Although some are known, none of them are still sufficient in terms of C/N and recording sensitivity. [Purpose] The present invention has been made in view of the above problems, and its purpose is to provide an optical information recording medium with high sensitivity and high resolution. [Structure] The inventors of the present invention have conducted various studies for the above-mentioned purpose, and have found that reducing the thickness of the recording layer requires less energy when forming pits, thereby increasing sensitivity. The present invention was developed by focusing on the fact that since the so-called rim (rim) becomes smaller, the pit spacing can be narrowed and higher recording density can be achieved. That is, the present invention provides an optical information recording medium with a dye reflective layer 2, as shown in the figure.
It is composed of a transparent intermediate layer 3 and a metal recording layer 4, the reflective layer has an appropriate reflectance and transmittance, the recording layer has an appropriate reflectance, and the thickness of the transparent intermediate layer is i/4n (however, λ is (where n means the wavelength of the reproduction light and n means the refractive index of the transparent intermediate layer), the transparent intermediate layer 3 has the following characteristics: When reproduction light is incident from the reflective layer, the light reflected by the reflective layer is determined by the transparent intermediate layer 3, as shown in the figure. r
and the light that passes through the reflective layer, reflects on the recording layer, and returns.
The antireflection structure is such that the light r' is canceled out by interference, and the light r is reflected at the pit portion 5 without being weakened, resulting in a large contrast.As a result, the reflectance of the reflective layer and the recording layer can be relatively low. Therefore, it becomes possible to reduce the thickness of the recording layer. The optical information recording medium of the present invention has a reflective layer, a transparent intermediate layer, and a recording layer laminated in sequence on a substrate, and is characterized in that the reflective layer is a dye thin film and the recording layer is a metal thin film. It is. Next, the structure of the optical information recording medium of the present invention will be explained with reference to the drawings. As shown in the figure, the optical information recording medium of the present invention basically comprises a dye reflective layer 2 provided on a substrate 1, a transparent intermediate layer 3 further provided thereon, and a metal recording layer 4 further provided thereon. It is something. When recording and reproducing light is incident from the substrate side, a transparent member such as glass or plastic is used as the substrate. On the other hand, when the recording/reproducing light is made to enter from the film surface, basically an opaque member such as metal or ceramics can be used in addition to the above-mentioned transparent member. The dye-reflecting layer contains one or more organic dyes and may optionally contain other components such as binders, stabilizers (eg, transition metal complexes), and the like. Organic dyes include dyes already proposed by the present inventors, such as cyanine, merocyanine, triphenylmethane, naphthoquinone, xanthene, and squalium dyes, as well as azo, stilbene, and phthalocyanine direct dyes, azo, anthraquine, and triphenyl dyes. Enylmethane, xanthene, azine acid dyes, cyanine, azo, azine, triphenylmethane basic dyes, azo, anthraquinone, xanthene, triphenylmethane mordant/acid mordant dyes, anthraquinone, indigoid dyes. Dyes, azo, anthraquinone, phthalocyanine, triphenylmethane-based oil-soluble dyes, etc. can be used. Among the organic dyes used in the present invention, cyanine dyes and merocyanine dyes are particularly preferred, and these are represented by the following formulas. However, R 1 and R 2 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or an alkenyl group, and Z 1 and Z 2 are atomic groups necessary to complete the substituted or unsubstituted heterocycle. and Z 3 is a substituted or unsubstituted 5-membered ring or a 6-membered ring.
Indicates the atomic group necessary to complete the membered ring, and the 5-membered ring or 6-membered ring may be fused with an aromatic ring, R 3 represents a hydrogen atom or a halogen atom, R 4 and R 5 represents a hydrogen atom, a halogen atom, a hydroxy group, a carboxyl group, an alkyl group, a substituted or unsubstituted aryl group, or an acyloxy group, X represents an acid anion, and l,
m and n are 0 or 1. however,
【式】は【ceremony
【式】【formula】
【式】【formula】
【式】【formula】
【式】などの環を表わしそして
上記式中のベンゼン環およびナフチル環は置換さ
れていてもよく、represents a ring such as [Formula], and the benzene ring and naphthyl ring in the above formula may be substituted,
【式】 は【formula】 teeth
【式】【formula】
【式】【formula】
以下に比較例および実施例を掲げて本発明をさ
らに説明するが本発明はこれらに限定されるもの
ではない。
実施例 １
ガラス基板（屈折率1.5）上に、１−メチル−
２−〔５−（１−メチル−３，３−ジメチル−２−
インドリニリデン）ペンタジエニル〕−３，３−
ジメチルインドリウムクロリドの0.5％ジクロル
エタン溶液をスピンナ塗布して乾燥し厚さ40nｍ
の反射層を形成した。さらにこの上にSiOを厚さ
130nｍで蒸着して透明中間層を形成した。次に
この上にTeを厚さ10nｍで蒸着して記録層を形成
し記録媒体を作製した。この記録媒体に波長
790nｍの半導体レーザを用いビーム径1.6μｍ、線
速1.2ｍ／sec、照射面パワー2.0ｍＷで2MHzの信
号を記録した。次いで、これに0.2ｍＷのレーザ
光をあて情報を読み出したところＣ／N55dBの
読出信号が得られた。
実施例 ２〜６
実施例１と同様にして以下の表に示す構成の各
記録媒体を作製し信号の記録再生を行つたところ
以下の表に示すＣ／Ｎが得られた。
比較例 １
ガラス基板上にTeを10nｍの膜厚で蒸着し、実
施例１と同様にして信号の記録、再生を行つたと
ころ、Ｃ／N36dBの信号が得られた。
比較例 ２
比較例１のTe膜厚を40nmにして同様の実験を
行つたが、うまく記録できなかつた。
The present invention will be further explained below with reference to comparative examples and examples, but the present invention is not limited thereto. Example 1 1-methyl-
2-[5-(1-methyl-3,3-dimethyl-2-
indolinylidene)pentadienyl]-3,3-
A 0.5% dichloroethane solution of dimethylindolium chloride was applied using a spinner and dried to a thickness of 40 nm.
A reflective layer was formed. Furthermore, SiO is added to the thickness on top of this.
A transparent interlayer was formed by vapor deposition at 130 nm. Next, a recording layer was formed by vapor-depositing Te to a thickness of 10 nm on this, thereby producing a recording medium. This recording medium has a wavelength
A 2MHz signal was recorded using a 790nm semiconductor laser with a beam diameter of 1.6μm, a linear velocity of 1.2m/sec, and an irradiation surface power of 2.0mW. Next, when a 0.2 mW laser beam was applied to this to read out information, a read signal with a C/N of 55 dB was obtained. Examples 2 to 6 Recording media having the configurations shown in the table below were prepared in the same manner as in Example 1, and when signals were recorded and reproduced, the C/N values shown in the table below were obtained. Comparative Example 1 Te was deposited to a thickness of 10 nm on a glass substrate, and signals were recorded and reproduced in the same manner as in Example 1, and a signal with a C/N of 36 dB was obtained. Comparative Example 2 A similar experiment was conducted using Comparative Example 1 with a Te film thickness of 40 nm, but it was not possible to record well.
【表】
脂
ン
共重合体
[Table] Fat
hmm
copolymer
金属薄膜記録層と色素反射層との組合せからな
る本発明の光情報記録媒体により高感度および高
分解能を得ることができる。
High sensitivity and high resolution can be obtained by the optical information recording medium of the present invention comprising a combination of a metal thin film recording layer and a dye reflective layer.
図は本発明の光情報記録媒体の基本構成を示す
断面図である。
１……基板、２……色素反射層、３……透明中
間層、４……金属記録層、５……ピツト、６……
レーザビーム、７……集光レンズ。
The figure is a sectional view showing the basic structure of the optical information recording medium of the present invention. DESCRIPTION OF SYMBOLS 1...Substrate, 2...Dye reflective layer, 3...Transparent intermediate layer, 4...Metal recording layer, 5...Pits, 6...
Laser beam, 7...Condensing lens.
Claims (1)
順次積層してなりしかも前記反射層が色素薄膜で
あり且つ前記記録層が金属薄膜であることを特徴
とする光情報記録媒体。1. An optical information recording medium comprising a reflective layer, a transparent intermediate layer, and a recording layer laminated in sequence on a substrate, the reflective layer being a dye thin film, and the recording layer being a metal thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59142126A JPS6122989A (en) | 1984-07-11 | 1984-07-11 | Light information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59142126A JPS6122989A (en) | 1984-07-11 | 1984-07-11 | Light information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6122989A JPS6122989A (en) | 1986-01-31 |
| JPH0514632B2 true JPH0514632B2 (en) | 1993-02-25 |
Family
ID=15307985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59142126A Granted JPS6122989A (en) | 1984-07-11 | 1984-07-11 | Light information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6122989A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0708004A2 (en) | 2006-01-30 | 2011-05-17 | Platco Technologies Proprietary Ltd | preparation of platinum complexes (ii) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5489605A (en) * | 1977-09-29 | 1979-07-16 | Philips Nv | Information memory element |
| US4216501A (en) * | 1977-03-28 | 1980-08-05 | Rca Corporation | Optical anti-reflective information record |
-
1984
- 1984-07-11 JP JP59142126A patent/JPS6122989A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4216501A (en) * | 1977-03-28 | 1980-08-05 | Rca Corporation | Optical anti-reflective information record |
| JPS5489605A (en) * | 1977-09-29 | 1979-07-16 | Philips Nv | Information memory element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6122989A (en) | 1986-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |