JPH0379770B2 - - Google Patents
Info
- Publication number
- JPH0379770B2 JPH0379770B2 JP59019910A JP1991084A JPH0379770B2 JP H0379770 B2 JPH0379770 B2 JP H0379770B2 JP 59019910 A JP59019910 A JP 59019910A JP 1991084 A JP1991084 A JP 1991084A JP H0379770 B2 JPH0379770 B2 JP H0379770B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- adhesive layer
- adhesive
- noise
- optical recording
- 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
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001786 chalcogen compounds Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
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
- G11B7/252—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
- G11B7/256—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 layers improving adhesion between layers
-
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、光学的に記録再生する素子に係り、
特に、記録媒体張り合わせによる雑音の増加がな
い光学的記録素子に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an element for optically recording and reproducing,
In particular, the present invention relates to an optical recording element that does not increase noise due to bonding of recording media.
光学的に記録再生する素子は、レーザ光などの
光ビームによる熱によつて、反射率の変化する記
録媒体に、同様の記録媒体あるいは、保護基体を
張り付けることで成つている。ここで、上記記録
媒体は、第１図に示すように、光学的に透明な基
体（例えば、ガラス、アクリル樹脂、ポリエステ
ルフイルムなど）１上に、熱により反射率の変化
する記録部材（例えば、カルコゲン化合物、テル
ルなどのアモルフアス薄膜など）２が形成されて
成つている。このように構成される記録媒体は、
第２図のごとく、接着層３により、たとえば同様
の記録媒体と張り合わさつて両面形光学的記録素
子を形成する。以上により得られた光学的記録素
子の入射光と反射光の比率（iR′／iO）は、記録媒
体単独時の比率（iR／iO）に比べて大きくなり、
張り合わせた記録媒体の表面状態（例えば、接着
層との界面における気泡や形成むら）に応じた乱
反射成分が含まれ、雑音レベルを上げてしまい、
Ｓ／Ｎ（信号対雑音比）やＣ／Ｎ（キヤリヤ対雑音
比）を劣化させる問題があつた。
An optical recording/reproducing element is made by attaching a similar recording medium or a protective substrate to a recording medium whose reflectance changes due to heat generated by a light beam such as a laser beam. Here, as shown in FIG. 1, the recording medium is a recording member whose reflectance changes due to heat (for example, It is made up of chalcogen compounds, amorphous thin films such as tellurium, etc.)2. A recording medium configured in this way is
As shown in FIG. 2, a double-sided optical recording element is formed by bonding with, for example, a similar recording medium using the adhesive layer 3. The ratio of the incident light to the reflected light of the optical recording element (i R ′/i O ) obtained above is larger than the ratio when the recording medium is used alone (i R /i O ),
It contains diffuse reflection components depending on the surface condition of the bonded recording media (for example, bubbles or uneven formation at the interface with the adhesive layer), which increases the noise level.
There was a problem that the S/N (signal-to-noise ratio) and C/N (carrier-to-noise ratio) deteriorated.
本発明の目的は、光学的に記録・再生する素子
に関し、雑音レベルの低い、Ｓ／Ｎ、Ｃ／Ｎの良
好な光学的記録素子を提供するにある。
An object of the present invention is to provide an optical recording element with a low noise level and good S/N and C/N with respect to an optical recording/reproducing element.
光学的記録素子のＳ／Ｎ、Ｃ／Ｎの劣化を生じ
させるのは、張り合わされた別の記録素子あるい
は保護基体からの反射によるため、反射防止する
ために張り合わせる接着層に、光を吸収する接色
剤を混入するようにした。このようにすること
で、記録部材を通過した光が、接着層に吸収さ
れ、余分な反射が生じなくなり雑音も低下する。
Deterioration of the S/N and C/N of an optical recording element is caused by reflection from another recording element attached to it or from the protective substrate, so the adhesive layer attached to it to prevent reflection absorbs light. It is now possible to mix in a coloring agent. By doing so, the light that has passed through the recording member is absorbed by the adhesive layer, and no unnecessary reflection occurs and noise is also reduced.
本発明の実施例の構成を第３図に示す。図にお
いて、１，１′は、光学的に透明なアクリル樹脂
よりなる基体、２，２′は、基体１，１′上に設け
られ、熱により反射率の変化する記録部材、４
は、本発明による１実施例の接着層である。
The configuration of an embodiment of the present invention is shown in FIG. In the figure, 1 and 1' are substrates made of optically transparent acrylic resin, 2 and 2' are recording members provided on the substrates 1 and 1' and whose reflectance changes with heat, and 4.
is an example adhesive layer according to the present invention.
次に、本発明による実施例およびその結果につ
いて説明する。 Next, examples according to the present invention and their results will be described.
実施例 １
接着層を形成する接着剤として、エポキシ樹脂
にカーボンブラツク0.5wt％添加して用い、記録
部材上にスピンコータにより膜厚100μｍ形成し、
その上に、別の記録部材を張り合わせて記録素子
を得た。この結果、第４図の示すカーボンブラツ
ク添加量に対する雑音比の関係からわかるよう
に、カーボンブラツク無添加時に比べ雑音で約
9dB下がつた。Example 1 As an adhesive for forming an adhesive layer, 0.5 wt% of carbon black was added to an epoxy resin, and a film thickness of 100 μm was formed on a recording member using a spin coater.
A recording element was obtained by laminating another recording member thereon. As a result, as can be seen from the relationship between the noise ratio and the amount of carbon black added shown in Figure 4, the noise was approximately
9dB drop.
実施例 ２
接着剤として、成膜性の良い粘着形ホツトメル
トに、0.6wt％のカーボンブラツクを添加しロー
ルコータにより70μｍの膜を記録部材上に形成
し、その上に別の記録部材を接着させて得た。こ
の結果、雑音は、約8dB下がつた。Example 2 As an adhesive, 0.6 wt% carbon black was added to an adhesive hotmelt with good film-forming properties, a 70 μm film was formed on a recording member using a roll coater, and another recording member was adhered on top of it. I got it. As a result, the noise was reduced by about 8 dB.
実施例 ３
接着層として、カーボンブラツクを0.5wt％添
加したアクリル系両面粘着テープ（厚さ80μｍ）
で張り合わせた。結果、雑音は、約0.8dB下がつ
た。Example 3 Acrylic double-sided adhesive tape (thickness: 80 μm) with 0.5 wt% carbon black added as adhesive layer
It was pasted together. As a result, the noise was reduced by about 0.8dB.
以上の実施例は、カーボンブラツクを添加した
接着剤が、不透明な黒色で、記録部材を通過した
再生用レーザ光がほとんど吸収されてしまうの
で、再生光に余分な反射光が入らないため、８〜
9dB雑音レベルを下げることができた。したがつ
て、接着剤に添加する着色剤のうち、不透明に着
色するもの、例えば、アニリンブラツクなどでも
同様の効果は生じる。 In the above embodiments, the adhesive containing carbon black is opaque black and almost all of the reproduction laser light that has passed through the recording member is absorbed, so no extra reflected light enters the reproduction light. ~
We were able to reduce the noise level by 9dB. Therefore, among the coloring agents added to the adhesive, a similar effect can be obtained even if the coloring agent is opaquely colored, such as aniline black.
実施例 ４
記録媒体上に、実施例１の接着層を設け、その
上に、再生専用の媒体（信号に応じた凹凸を表面
に持つアクリル樹脂上に、約70μｍのAl蒸着膜を
有する）を、蒸着膜が接着層側に向くように張り
合わせた。再生専用の媒体に設けられたAl蒸着
膜は、およそ80％の反射率を持つため、従来技術
では、記録再生媒体と共用できなかつたが、本発
明により雑音レベルが10dB低下し、実用上問題
がなくなつた。Example 4 The adhesive layer of Example 1 was provided on the recording medium, and on top of that, a reproduction-only medium (having an Al vapor deposited film of about 70 μm on an acrylic resin whose surface had irregularities according to the signal) was provided. , and were attached so that the vapor-deposited film faced the adhesive layer side. Since the Al deposited film provided on the read-only medium has a reflectance of approximately 80%, it could not be used in common with the recording/playback medium using conventional technology, but the present invention reduces the noise level by 10 dB, making this a practical problem. has disappeared.
以上述べた実施例に用いた記録部材は、
Sb2Se3薄膜上にBi薄膜を形成した２層構造の膜
を用いた。しかし、記録部材として、他の薄膜で
あつても、不透明でなく、記録再生が同一平面よ
り行なわれる形（反射光を利用して再生する）の
場合には、上記薄膜と同様の効果は生じる。 The recording member used in the examples described above was
A two-layer film with a Bi thin film formed on a Sb2Se3 thin film was used. However, even if another thin film is used as a recording member, if it is not opaque and recording and reproducing is performed from the same plane (reproducing using reflected light), the same effect as the above thin film will occur. .
また、記録部材を、湿気や、取扱時のキズ発生
などから保護するために、記録部材を透明な膜で
覆つた情報記録媒体で、本発明を実施しても同様
の効果は生じる。 Further, the same effect can be obtained even if the present invention is applied to an information recording medium in which the recording member is covered with a transparent film in order to protect the recording member from moisture and scratches during handling.
本発明によれば、記録媒体を通過したレーザ光
を接着層により吸収し反射しないため、再生信号
の雑音を下げる効果がある。
According to the present invention, since the adhesive layer absorbs the laser light that has passed through the recording medium and does not reflect it, there is an effect of lowering the noise of the reproduced signal.
第１図は、記録媒体を概念的に表わす要部断面
図、第２図は、二つの記録媒体を張り合わせて得
る光学的記録素子を概念的に表わす要部断面図、
第３図は、本発明による光学的記録素子を概念的
に表わす要部断面図、第４図は、接着剤に添加し
たカーボンブラツクの量と、雑音比の関係を表わ
す特性図である。
１……基体、２……記録部材、３，４……接着
層。
FIG. 1 is a sectional view of a main part conceptually showing a recording medium, and FIG. 2 is a sectional view of a main part conceptually showing an optical recording element obtained by laminating two recording media together.
FIG. 3 is a sectional view of a main part conceptually showing an optical recording element according to the present invention, and FIG. 4 is a characteristic diagram showing the relationship between the amount of carbon black added to the adhesive and the noise ratio. 1...Substrate, 2...Recording member, 3, 4...Adhesive layer.
Claims (1)
素子において、該媒体が着色剤を混入した接着層
を介するように張り合わされていることを特徴と
する光学的記録素子。 ２ 特許請求の範囲第１項記載の光学的記録素子
において、上記接着剤が、不透明な染料あるいは
顔料である光学的記録素子。[Scope of Claims] 1. An optical recording element comprising information recording media laminated together, characterized in that the media are laminated together via an adhesive layer containing a colorant. 2. The optical recording element according to claim 1, wherein the adhesive is an opaque dye or pigment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59019910A JPS60164938A (en) | 1984-02-08 | 1984-02-08 | Optical recording element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59019910A JPS60164938A (en) | 1984-02-08 | 1984-02-08 | Optical recording element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60164938A JPS60164938A (en) | 1985-08-28 |
| JPH0379770B2 true JPH0379770B2 (en) | 1991-12-19 |
Family
ID=12012365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59019910A Granted JPS60164938A (en) | 1984-02-08 | 1984-02-08 | Optical recording element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60164938A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0630168B2 (en) * | 1984-11-30 | 1994-04-20 | 株式会社日立製作所 | Optical information recording medium |
| JPH10289479A (en) * | 1997-04-10 | 1998-10-27 | Tdk Corp | Optical recording medium |
-
1984
- 1984-02-08 JP JP59019910A patent/JPS60164938A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60164938A (en) | 1985-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |