JPS60154098A - Optical recording and reading medium - Google Patents
Optical recording and reading mediumInfo
- Publication number
- JPS60154098A JPS60154098A JP59010157A JP1015784A JPS60154098A JP S60154098 A JPS60154098 A JP S60154098A JP 59010157 A JP59010157 A JP 59010157A JP 1015784 A JP1015784 A JP 1015784A JP S60154098 A JPS60154098 A JP S60154098A
- Authority
- JP
- Japan
- Prior art keywords
- change
- org
- phthalocyanine
- film
- crystal
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
- G11B7/248—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes porphines; azaporphines, e.g. phthalocyanines
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は光学的記録再生メモリーに係り、特に追記でき
る光学的記録読取媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an optical recording/reproducing memory, and more particularly to a recordable optical recording/reading medium.
従来、レーザー光線の如き高密度の光ビームを用いて記
録する記録媒体には、可逆的のもの非可逆的なものとい
ろいろある。その一つにテルル等の低融点金属の薄膜に
レーザーを照射しピットを形成する方法がある。これら
のものは追加記録ができる長所があるものの、反面高価
であり大出力のレーザーを必要とし、かっとりわけ記録
層を燃焼させて記録孔を形成する際にテルルの如き猛毒
物質が四散する欠点があった。BACKGROUND ART Conventionally, there are various types of recording media, including reversible and irreversible types, on which recording is performed using a high-density light beam such as a laser beam. One method is to irradiate a thin film of a low melting point metal such as tellurium with a laser to form pits. Although these devices have the advantage of being able to record additional information, they are expensive, require high-power lasers, and have the disadvantage of scattering highly toxic substances such as tellurium when burning the recording layer to form recording holes. there were.
以上の従来技術の問題点並びに開発技術を検討して、本
発明の目的は大出力レーザーを不要としかつ有毒有害物
質を生じないクリーンな光学的記録読取媒体を提供する
ことにある。In view of the above-mentioned problems of the prior art and developed techniques, an object of the present invention is to provide a clean optical recording/reading medium that does not require a high-power laser and does not generate toxic or harmful substances.
本発明は、レーザー光の如き高密度エネルギービームを
効率よく吸収し、結晶変化により吸収スペク１ヘルの変
化を示す有機物膜を利用し、光の透過率の変化する部分
を形成する。有機物膜の上又は下に金属膜を形成する場
合には、レーザー光により有機物の吸収スペクトルの変
化により光の反射率の変化する部分を形成する。この金
属薄膜は機械的、力学的に強度がありレーザー光を反射
する材質のもので、例えばＡ Ｑ ｔ Ａ ｕ ｒ Ｃ
ｒ ｇ Ｎ １１Ａｇ、 Ｐ ｔ 、 Ｃｕ’Ｌ Ｆ
ｅ等が挙げられる。有機物薄膜としては５５０ｎｍから
７００ｎｍにわたる波長の光に対して大きな吸収率を示
し、その吸収した光エネルギーによる結晶変化によりそ
の領域の波長の光の吸収率があまり変化しない無金属フ
タロシアニン、銅フタロシアニン、コバルトフタロシア
ニンもしくはアルミニウムフタロシアニンクロリドが挙
げられ、その結晶系はαの型であり、光エネルギーの吸
収によりβ型に結晶系が変化するものであり、その膜厚
が０．１μｍ〜５０μＭの薄膜を形成してなることを特
徴とする光学的記録読取媒体とする。The present invention utilizes an organic material film that efficiently absorbs a high-density energy beam such as a laser beam and exhibits a change in absorption spectrum 1 Her due to crystal change to form a portion in which the light transmittance changes. When a metal film is formed on or below an organic film, a laser beam is used to form a portion where the light reflectance changes due to a change in the absorption spectrum of the organic material. This metal thin film is made of a material that is mechanically and mechanically strong and reflects laser light, such as A Q t A ur C
r g N 11Ag, P t , Cu'L F
Examples include e. As organic thin films, metal-free phthalocyanine, copper phthalocyanine, and cobalt exhibit a large absorption rate for light with wavelengths ranging from 550 nm to 700 nm, and the absorption rate of light in that wavelength range does not change much due to crystal changes due to the absorbed light energy. Examples include phthalocyanine or aluminum phthalocyanine chloride, whose crystal system is α type and changes to β type by absorption of light energy, forming a thin film with a thickness of 0.1 μm to 50 μM. An optical recording/reading medium characterized by:
〔発明の実施例〕 以下、本発明の実施例を第１図により説明する。[Embodiments of the invention] Embodiments of the present invention will be described below with reference to FIG.
実施例１゜
第１図はこの発明に基く光学的記録読取媒体の実施例図
である。第１図において１はガラス、２は銅フタロシア
ニンの真空蒸着膜である。この銅フタロシアニン蒸着膜
の可視吸収スペクトルを第２図に示す。このスペクトル
がら銅フタロシアニンはα型である。Embodiment 1 FIG. 1 is an embodiment of an optical recording/reading medium according to the present invention. In FIG. 1, 1 is glass and 2 is a vacuum-deposited film of copper phthalocyanine. The visible absorption spectrum of this vapor-deposited copper phthalocyanine film is shown in FIG. Based on this spectrum, copper phthalocyanine is of the α type.
以上のようにして得られた記録媒体に６３２．４ ｎｍ
のレーザー光を光パワー５ｍＷで２０ｎｓｅｃ照射した
ところ７１４ｎｍの史の透過率が３０％から５％に減少
した。また７２８ｎｍの光の透過率は４０％から１０％
に減少した。この光の透過率の変化は結晶型がα型から
β型の変化に対応する。このβ型銅フタロシアニンの吸
収スペクｉルを第３図に示す。このように６３２．４ｎ
ｍの光照射により情報記録を行い７００ｎｍ以上の波長
の光によりその透過率の変化により情報記録読み出しが
行えることが可能となった。第２図、第３図に示したス
ペクトルから明らがなようにα型がらβ型への結晶変化
がおこっても、５５０ｎｍがら７００ｎｍ領域では吸光
度はあまり変化せず特に６３２．４ｎｍでは全く変化が
ない。従ってこの領域の光は効率よく情報記録光として
利用できる。632.4 nm on the recording medium obtained as above.
When the laser beam was irradiated for 20 ns with an optical power of 5 mW, the transmittance at 714 nm decreased from 30% to 5%. Also, the transmittance of 728nm light is 40% to 10%.
decreased to This change in light transmittance corresponds to a change in crystal type from α type to β type. The absorption spectrum of this β-type copper phthalocyanine is shown in FIG. Like this 632.4n
It became possible to record information by irradiating light with a wavelength of 700 nm or more, and to read out information by changing the transmittance of light with a wavelength of 700 nm or more. As is clear from the spectra shown in Figures 2 and 3, even if a crystal change occurs from the α type to the β type, the absorbance does not change much in the 550 nm to 700 nm region, and in particular, there is no change at all at 632.4 nm. There is no. Therefore, the light in this region can be efficiently used as information recording light.
実施例２゜
実施例１で用いた銅フタロシアニンのかわりに無金属フ
タロシアニンを用いた。第１図において２は無金属フタ
ロシアニンの真空蒸着膜である。Example 2 A metal-free phthalocyanine was used in place of the copper phthalocyanine used in Example 1. In FIG. 1, 2 is a vacuum-deposited film of metal-free phthalocyanine.
この無金属フタロシアニン蒸着膜の可視吸収スペクトル
を第４図に示す。このスペクトルから無金属フタロシア
ニンはα型である。The visible absorption spectrum of this metal-free phthalocyanine vapor-deposited film is shown in FIG. From this spectrum, the metal-free phthalocyanine is in the α type.
以上のようにした得られた記録媒体に６３２．４ ｎｍ
のレーザー光を光パワー５ｍＷで２０ｎｓｅｃ照射した
ところ７２０ｎｍの光の透過率が４０％から５％に減少
した。この光の透過率の変化は結晶型がα型からβ型の
変化に対応する。このβ型無金属フタロシアニンの吸収
スペクトルを第５図に示す。632.4 nm on the recording medium obtained as above.
When the laser beam was irradiated for 20 ns with an optical power of 5 mW, the transmittance of 720 nm light decreased from 40% to 5%. This change in light transmittance corresponds to a change in crystal type from α type to β type. The absorption spectrum of this β-type metal-free phthalocyanine is shown in FIG.
このように６３２．４ ｎｍの光照射により情報記録を
行い７００ｎｍ以上の光照射によりその透過率の変化に
より情報記録読み出しが行えることか可能となった。第
４図、第５図に示したスペクトルから明らかなようにα
型からβ型への結晶変化がおこっても、５５０ｎｍから
７００ｎｍ領域では吸光度はあまり変化しない。従って
この領域の光は効率よく情報記録光として利用できる。In this way, it has become possible to record information by irradiating light at 632.4 nm, and to read out information by changing the transmittance by irradiating light at 700 nm or more. As is clear from the spectra shown in Figures 4 and 5, α
Even if a crystal change occurs from type to β type, the absorbance does not change much in the 550 nm to 700 nm region. Therefore, the light in this region can be efficiently used as information recording light.
以上の説明において基板としてガラス板を用いたが変発
明はこれに限るものではなく高分子板を採用することも
可能である。又、有機物膜として銅フタロシアニン及び
無金属フタロシアニンを用いたが、他にコバルトフタロ
シアニンあるいはアルミニウムフタロシアニンクロリド
を採用することが可能である。又、有機物膜の上又は下
に光を反射する金属膜を用いることにより反射光の先爪
変化により情報の読み出しも可能である。Although a glass plate was used as the substrate in the above description, the invention is not limited to this, and a polymer plate may also be used. Further, although copper phthalocyanine and metal-free phthalocyanine were used as the organic film, it is also possible to use cobalt phthalocyanine or aluminum phthalocyanine chloride. Furthermore, by using a metal film that reflects light on or below the organic film, it is possible to read information by changing the tip of the reflected light.
以上説明したように本発明によれば光学的記録読取媒体
において無害な有機物膜の結晶変化を利用して情報を記
録することにより、低出力レーザ光で安全に情報が書込
むことが可能となった。As explained above, according to the present invention, by recording information using crystal changes in a harmless organic film in an optical recording/reading medium, it is possible to safely write information with a low-power laser beam. Ta.
第１図は光学的記録読取媒体を示す図、第２図はα型銅
ブタロシアニンの吸収スペクトルを示す図、第３図はβ
型銅フタロシアニンの吸収スペクトルを示す図、第４図
はα型無金属フタロシアニンの吸収スペクトルを示す図
、第５図はβ型無金属フタロシアニンの吸収スペクトル
を示す図である。
第２図
窯長（ｎｍ）
佑３図
ル侵 （ｎｍ）
翳牟図
油長（ｎ ｍ ）
千５日
部長（ｒ＋ｙｎ）Figure 1 shows an optical recording/reading medium, Figure 2 shows the absorption spectrum of α-type copper butalocyanine, and Figure 3 shows the β-type copper butalocyanine absorption spectrum.
FIG. 4 is a diagram showing the absorption spectrum of α-type metal-free phthalocyanine, and FIG. 5 is a diagram showing the absorption spectrum of β-type metal-free phthalocyanine. Fig. 2 Kiln length (nm) Yu 3 kiln length (nm) Omuzu oil length (n m) 1,500 day manager (r+yn)
Claims (1)
そのエネルギーを吸収しその光エネルギーによる結晶構
造変化を起す有機物膜からなることを特徴とする光学的
記録読取媒体。 ２、有機物膜は無金属フタロシアニン、銅フタロシアニ
ン、コバルトフタロシアニンもしくはアルミニウムフタ
ロシアニンクロウドであることを特徴とする特許請求の
範囲第１項記載の光学的記録読取媒体。 ３、有機物膜層の上に金属薄膜を有することを特徴とす
る特許請求の範囲第１項記載の光学的記録読取媒体。[Claims] 1. By a high-density energy beam such as a laser beam,
An optical recording/reading medium comprising an organic film that absorbs the energy and causes a crystal structure change due to the light energy. 2. The optical recording/reading medium according to claim 1, wherein the organic film is metal-free phthalocyanine, copper phthalocyanine, cobalt phthalocyanine, or aluminum phthalocyanine. 3. The optical recording/reading medium according to claim 1, which has a metal thin film on the organic film layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59010157A JPS60154098A (en) | 1984-01-25 | 1984-01-25 | Optical recording and reading medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59010157A JPS60154098A (en) | 1984-01-25 | 1984-01-25 | Optical recording and reading medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60154098A true JPS60154098A (en) | 1985-08-13 |
Family
ID=11742438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59010157A Pending JPS60154098A (en) | 1984-01-25 | 1984-01-25 | Optical recording and reading medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60154098A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6419532A (en) * | 1987-07-13 | 1989-01-23 | Sharp Kk | Method, device and medium for information recording and reproducing |
| US4933221A (en) * | 1984-07-31 | 1990-06-12 | Canon Kabushiki Kaisha | Optical recording device |
| JPH03138193A (en) * | 1989-10-25 | 1991-06-12 | Pioneer Electron Corp | Postscript type optical disk |
-
1984
- 1984-01-25 JP JP59010157A patent/JPS60154098A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933221A (en) * | 1984-07-31 | 1990-06-12 | Canon Kabushiki Kaisha | Optical recording device |
| JPS6419532A (en) * | 1987-07-13 | 1989-01-23 | Sharp Kk | Method, device and medium for information recording and reproducing |
| JPH03138193A (en) * | 1989-10-25 | 1991-06-12 | Pioneer Electron Corp | Postscript type optical disk |
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