JPH01159840A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH01159840A JPH01159840A JP62319492A JP31949287A JPH01159840A JP H01159840 A JPH01159840 A JP H01159840A JP 62319492 A JP62319492 A JP 62319492A JP 31949287 A JP31949287 A JP 31949287A JP H01159840 A JPH01159840 A JP H01159840A
- Authority
- JP
- Japan
- Prior art keywords
- film
- optical disc
- forming
- recording
- insulating film
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 6
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010408 film Substances 0.000 claims description 76
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- 238000002834 transmittance Methods 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 abstract description 4
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 abstract description 4
- 229920000515 polycarbonate Polymers 0.000 abstract description 2
- 238000003848 UV Light-Curing Methods 0.000 abstract 1
- 238000002310 reflectometry Methods 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052714 tellurium Inorganic materials 0.000 description 2
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオディスク、ディジタルオーディオディス
ク（例えばコンパクトディスク）、静止画、文書ファイ
ルなどのディジタル信号を記録、再生および消去可能な
光ディスクに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical disc capable of recording, reproducing, and erasing digital signals such as video discs, digital audio discs (eg, compact discs), still images, and document files.
従来の技術
一般に、光ディスクはその情報密度が大きいこと、ノイ
ズが少ないことなどから情報媒体として有望視され、ビ
デオディスク、ディジタルオーディオディスクとして商
品化されている。2. Description of the Related Art In general, optical discs are considered promising as information media because of their high information density and low noise, and have been commercialized as video discs and digital audio discs.
第３図に従来の一般的なディジタルオーディオディスク
であるコンパクトディスクの概要金子す。Figure 3 shows an overview of a compact disc, which is a conventional, common digital audio disc.
これはＰＣＭ変換されたディジタル信号が樹脂基板にピ
ット列状に記録され、半導体レーザ光により再生される
ものである。In this method, a PCM-converted digital signal is recorded in the form of a pit row on a resin substrate, and is reproduced by a semiconductor laser beam.
第３図において、１はディスク、２は樹脂基板、３は樹
脂基板２に刻まれたピット列状のディジタル信号部、４
はその表面に形成された反射膜、６は反射膜４に設けら
れた保護膜、ｅは保護膜５に設けられたレーベル印刷膜
、７は再生用の半導体レーザ光である。In FIG. 3, 1 is a disk, 2 is a resin substrate, 3 is a digital signal part in the form of a pit row carved on the resin substrate 2, and 4
6 is a reflective film formed on the surface thereof, 6 is a protective film provided on the reflective film 4, e is a label printing film provided on the protective film 5, and 7 is a semiconductor laser beam for reproduction.
反射膜４はディジタル信号を再生するため、保護膜６は
反射膜を保護するため、レーベル印刷膜６はディスクを
識別するために各々必要なものである。The reflective film 4 is necessary for reproducing digital signals, the protective film 6 is necessary for protecting the reflective film, and the label printing film 6 is necessary for identifying the disc.
従来は、あらかじめ情報がピット列状のディジタル信号
にて形成され、それを半導体レーザ光により読み取り再
生される再生専用の光ディスクが主流であった。Conventionally, read-only optical discs have been the mainstream, in which information is formed in advance as a digital signal in the form of a pit string, and the information is read and reproduced using a semiconductor laser beam.
また近年、情報を記録し再生する追記型、また情報を記
録し消去する消去可能型光ディスクの研究がなされてい
る。その一般的な構造を第２図に示す。第２図において
、樹脂製またはガラス製基板８上に記録膜９を形成し、
その上に保護膜１０を形成し構成されるものであり、絶
縁膜および反射膜は存在しない。Furthermore, in recent years, research has been carried out on write-once type optical discs that record and reproduce information, and erasable type optical discs that record and erase information. Its general structure is shown in FIG. In FIG. 2, a recording film 9 is formed on a resin or glass substrate 8,
A protective film 10 is formed thereon, and an insulating film and a reflective film are not present.
発明が解決しようとする問題点 しかしながら上記のような構成では、一般に。The problem that the invention seeks to solve However, in the above configuration, generally.
記録膜自体の光に対する透過率または反射率等の光学的
変化が小さいため、Ｃ／Ｎが小さくて信頼性に欠けるこ
とや、コンパクトディスクとの互換性がないことなどの
問題点を有していた。Since optical changes such as transmittance or reflectance of the recording film itself are small, there are problems such as low C/N and lack of reliability, and incompatibility with compact discs. Ta.
本発明は上記問題点に鑑み、安定性、信頼性が高い光デ
ィスクを量産性良く提供するものである。In view of the above problems, the present invention provides an optical disc with high stability and reliability that can be easily mass-produced.
問題点を解決するための手段
上記問題点を解決するために本発明は、案内溝、または
案内溝とセクター用情報とが設けられた樹脂基板上に絶
縁膜を形成し、上記絶縁膜上に記録膜を形成し、上記記
録膜上に反射膜を形成し、上記反射膜上に保護膜を形成
し構成されるものでちる。Means for Solving the Problems In order to solve the above problems, the present invention forms an insulating film on a resin substrate provided with guide grooves or guide grooves and sector information, and forms an insulating film on the insulating film. A recording film is formed, a reflective film is formed on the recording film, and a protective film is formed on the reflective film.
作用
本発明は上記した構成によって、案内溝、または案内溝
とセクター用情報とが設けられた樹脂基板上に絶縁膜を
形成し、上記絶縁膜上に記録膜を形成し、上記記録膜上
に反射膜を形成し、上記反射膜上に保護膜を形成し構成
されることにより。Effect of the present invention With the above-described configuration, an insulating film is formed on a resin substrate provided with a guide groove or a guide groove and sector information, a recording film is formed on the insulating film, and a recording film is formed on the recording film. By forming a reflective film and forming a protective film on the reflective film.
コントラストの小さな記録膜の光学的変化を反射率の高
い反射膜でカバーすることにより安定性。Stability is achieved by covering optical changes in the recording film with low contrast with a reflective film with high reflectance.
信頼性の高い光ディスクを量産性良く提供し、しかもコ
ンパクトディスクとの互換性を可能にした消去可能な光
ディスクを提供するものである。To provide a highly reliable optical disc that can be mass-produced and also to provide an erasable optical disc that is compatible with compact discs.
実施例
以下本発明の一実施例の光ディスクについて図面を参照
しながら説明する。EXAMPLE Hereinafter, an optical disc according to an example of the present invention will be described with reference to the drawings.
第１図は本発明の光ディスクを示す断面の要部拡大図で
ある。１１はポリカーボネートＰＣ製の樹脂基板、１２
は上記樹脂基板１１に設けられたトレースを容易にする
ためのスパイラル状の案内溝である。FIG. 1 is an enlarged cross-sectional view of essential parts of an optical disc of the present invention. 11 is a resin substrate made of polycarbonate PC, 12
is a spiral guide groove provided on the resin substrate 11 to facilitate tracing.
１３は上記樹脂基板１１上に設けられた約１０００人酸
化ケイソＳｉＯより構成される絶縁膜である。Reference numeral 13 denotes an insulating film made of approximately 1000 silicon oxide SiO provided on the resin substrate 11.
１４は上記絶縁膜１３上に形成された約１０００人のシ
アニン色素の記録膜であり、スピナー法により塗布され
ている。14 is a recording film of approximately 1000 cyanine dyes formed on the insulating film 13, and is applied by a spinner method.
１６は上記記録膜１４上に設けられ次的１０００人のア
ルミニウムＡｌ 反射膜である。Reference numeral 16 is an aluminum reflective film provided on the recording film 14 and having a thickness of 1,000.
１６はアルミニウムＡ１ 反射膜１５上に設けられた約
１０μｍの紫外線硬化型樹脂の保護膜である。Reference numeral 16 denotes a protective film made of ultraviolet curable resin with a thickness of about 10 μm provided on the aluminum A1 reflective film 15.
記録用または消去用のレーザ光（図示せず）が、樹脂基
板１１の読取面方向から記録膜１４に照射されれば、記
録膜１４の透過率が変化することにより信号が記録また
は消去される。この場合、記録膜１４に光学的な透過率
の変化を生じさせるためには、記録膜１４の温度を転移
温度Ｔｃ以上の温度にあげる必要がある。そのため、樹
脂基板１１の温度が上がり熱的な劣化が生じる。これを
防止し、熱的に遮断するために絶縁膜１３が必要となる
。このように記録された信号を再生用のレーザ光（図示
せず）にて再生することにより、光学的変化を読み取る
ことができる。また、アルミニウムへ１反射膜を設けた
ことにより、反射率を大きくできること、およびコンパ
クトディスクとの互換性が可能となる。When a recording or erasing laser beam (not shown) is irradiated onto the recording film 14 from the reading surface direction of the resin substrate 11, a signal is recorded or erased by changing the transmittance of the recording film 14. . In this case, in order to cause a change in optical transmittance in the recording film 14, it is necessary to raise the temperature of the recording film 14 to a temperature equal to or higher than the transition temperature Tc. Therefore, the temperature of the resin substrate 11 increases and thermal deterioration occurs. The insulating film 13 is required to prevent this and provide thermal insulation. Optical changes can be read by reproducing the signals recorded in this manner using a reproducing laser beam (not shown). Furthermore, by providing one reflective film on aluminum, it is possible to increase the reflectance and to make it compatible with compact discs.
樹脂基板１１に設けられた情報としては、トレースを容
易にするためのスパイラル状の案内溝のかわりに、同心
円状の案内溝と位置情報を示すセクターの設けられたの
も有効である。As for the information provided on the resin substrate 11, it is also effective to provide concentric guide grooves and sectors indicating position information instead of spiral guide grooves to facilitate tracing.
絶縁膜としては、酸化ケイ素ＳｉＯの他、酸化チタンＴ
ｉＯなどの透明耐熱性の無機酸化物、＝１．たけ人造ダ
イヤモンドなどの無機薄膜などが有効である。In addition to silicon oxide SiO, titanium oxide T is used as the insulating film.
Transparent heat-resistant inorganic oxide such as iO, =1. Inorganic thin films such as bamboo artificial diamond are effective.
記録膜としては、シアニン色素の他、書き込み用または
消去用のレーザー光を照射することにより透過率など光
学的変化することを特徴とする。In addition to the cyanine dye, the recording film is characterized by optical changes such as transmittance by irradiation with writing or erasing laser light.
相変態型のテルルＴｅ 、テルル低級酸化物（ＴｅＯｘ
；ｘ＜ ２ ）なども有効である。Phase transformation type tellurium Te, tellurium lower oxide (TeOx
;x<2) etc. are also valid.
反射膜としては、アルミニウムＡＩ の他、チタンＴ
ｉ などの８０％以上の反射率を有する金属薄膜も有
効である。In addition to aluminum AI, titanium T is used as the reflective film.
A metal thin film having a reflectance of 80% or more, such as i, is also effective.
保護膜としては、紫外線硬化型樹脂の他、酸化ケイ素５
ｉＯ１酸化チタンＴｉＯなどの無機酸化物などが有効で
ある。As a protective film, in addition to ultraviolet curable resin, silicon oxide 5
Inorganic oxides such as iO1 titanium oxide TiO are effective.
発明の効果
以上のように本発明は、案内溝、または案内溝とセクタ
ー用情報とが設けられた樹脂基板上に絶縁膜を形成し、
上記絶縁）換上に記録膜を形成し、上記記録膜上に反射
膜を形成し、上記反射膜上に保護膜を形成し構成される
ことにより、シアニン色素の記録膜自体の光に対する特
性はよくないが、アルミニウムＡｌ 反射膜の存在に
より、光学的なコントラストが向上するためにＣ／Ｎが
大きくなり、信頼性、安定性の高い光ディスクを提供す
ることができる。Effects of the Invention As described above, the present invention forms an insulating film on a resin substrate provided with a guide groove or a guide groove and sector information,
By forming a recording film on the above-mentioned insulating film, forming a reflective film on the recording film, and forming a protective film on the reflective film, the characteristics of the recording film itself of the cyanine dye against light can be improved. Although it is not good, the presence of the aluminum reflective film improves the optical contrast and increases the C/N, making it possible to provide an optical disc with high reliability and stability.
また、反射膜と絶縁膜とを設けることにより。Also, by providing a reflective film and an insulating film.
高い反射率を有すると共に、信号消去時の熱的な樹脂基
板の劣化を防止することができるためコンパクトディス
クとの互換性を可能にした消去可能な光ディスクを提供
することができる。It is possible to provide an erasable optical disc that has high reflectance and can prevent thermal deterioration of the resin substrate during signal erasing, making it compatible with compact discs.
第１図は本発明の光ディスクを示す要部断面拡大図、第
２図は従来の光ディスクを示す要部断面拡大図、第３図
ａ、ｂ、ｃは光ディスクの一種であるコンパクトディス
クの平面図、断面図、および要部拡大図である。
１１・・・・・・樹脂基板、１２・・・・・・案内溝、
１３・・・・・・絶縁膜、１４・・・・・・記録膜、１
５・・・・・・反射膜、１６・・・・・・保護膜。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名ｆｆ
−−礪脂基扱
／Ｚ−ｍ−案内溝
Ｉ３−一一鼻色＆く膜
１４・−記全条膜
／？
第２図Fig. 1 is an enlarged cross-sectional view of a main part showing an optical disc of the present invention, Fig. 2 is an enlarged cross-sectional view of a main part showing a conventional optical disc, and Fig. 3 a, b, and c are plan views of a compact disc, which is a type of optical disc. , a sectional view, and an enlarged view of essential parts. 11... Resin substrate, 12... Guide groove,
13... Insulating film, 14... Recording film, 1
5... Reflective film, 16... Protective film. Name of agent: Patent attorney Toshio Nakao and one other personff
--Sedimentous base treatment/Z-m-Guide groove I3-11 Nose color & cloudy membrane 14・-Written all striated membranes/? Figure 2
Claims (5)
られた樹脂基板上に絶縁膜を形成し、上記絶縁膜上に記
録膜を形成し、上記記録膜上に反射膜を形成し、上記反
射膜上に保護膜を形成し構成されることを特徴とする光
ディスク。(1) forming an insulating film on a resin substrate provided with a guide groove or a guide groove and sector information; forming a recording film on the insulating film; forming a reflective film on the recording film; An optical disc characterized in that it is constructed by forming a protective film on the reflective film.
ＴｉＯなどの透明耐熱性の無機酸化物、または人造ダイ
ヤモンドなどの無機物薄膜であることを特徴とする特許
請求の範囲第１項記載の光ディスク。(2) The optical disc according to claim 1, wherein the insulating film is a transparent heat-resistant inorganic oxide such as silicon oxide SiO or titanium oxide TiO, or an inorganic thin film such as artificial diamond.
照射することにより透過率が変化することを特徴とする
特許請求の範囲第１項記載の光ディスク。(3) The optical disc according to claim 1, wherein the recording film has a transmittance that changes by being irradiated with laser light for writing and erasing.
金属薄膜であり、８０％以上の反射率を有することを特
徴とする特許請求の範囲第１項記載の光ディスク。(4) The optical disc according to claim 1, wherein the reflective film is a metal thin film such as aluminum Al or titanium Ti, and has a reflectance of 80% or more.
などの無機酸化物、または紫外線硬化型樹脂などの有機
物膜で構成されることを特徴とする特許請求の範囲第１
項記載の光ディスク。(5) The protective film is silicon oxide SiO, titanium oxide TiO
Claim 1 is characterized in that it is composed of an inorganic oxide such as or an organic film such as an ultraviolet curable resin.
Optical disc described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319492A JP2506867B2 (en) | 1987-12-17 | 1987-12-17 | optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319492A JP2506867B2 (en) | 1987-12-17 | 1987-12-17 | optical disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01159840A true JPH01159840A (en) | 1989-06-22 |
| JP2506867B2 JP2506867B2 (en) | 1996-06-12 |
Family
ID=18110817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62319492A Expired - Fee Related JP2506867B2 (en) | 1987-12-17 | 1987-12-17 | optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506867B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004030919A1 (en) * | 2002-09-30 | 2004-04-15 | Matsushita Electric Industrial Co., Ltd. | Optical information recording substrate and recording/ reproducing device using it |
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|---|---|---|---|---|
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| JPS57169996A (en) * | 1981-04-09 | 1982-10-19 | Sharp Corp | Magnetooptic storage element |
| JPS5860336U (en) * | 1981-10-15 | 1983-04-23 | パイオニア株式会社 | information recording disk |
| JPS5942577A (en) * | 1982-08-31 | 1984-03-09 | Sharp Corp | Magnetooptic storage element |
| JPS59110052A (en) * | 1982-12-15 | 1984-06-25 | Sharp Corp | Optical memory element and its manufacture |
| JPS615450A (en) * | 1984-06-19 | 1986-01-11 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS6113458A (en) * | 1984-06-29 | 1986-01-21 | Hitachi Ltd | Optical information recording medium and cutting device |
| JPS62177735A (en) * | 1986-01-30 | 1987-08-04 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS62200544A (en) * | 1986-02-27 | 1987-09-04 | Toshiba Corp | Optical recording medium |
| JPS62271240A (en) * | 1986-05-20 | 1987-11-25 | Toshiba Corp | Optical recording medium |
-
1987
- 1987-12-17 JP JP62319492A patent/JP2506867B2/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5567949A (en) * | 1978-11-08 | 1980-05-22 | Philips Nv | Memory carrier |
| JPS57169996A (en) * | 1981-04-09 | 1982-10-19 | Sharp Corp | Magnetooptic storage element |
| JPS5860336U (en) * | 1981-10-15 | 1983-04-23 | パイオニア株式会社 | information recording disk |
| JPS5942577A (en) * | 1982-08-31 | 1984-03-09 | Sharp Corp | Magnetooptic storage element |
| JPS59110052A (en) * | 1982-12-15 | 1984-06-25 | Sharp Corp | Optical memory element and its manufacture |
| JPS615450A (en) * | 1984-06-19 | 1986-01-11 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS6113458A (en) * | 1984-06-29 | 1986-01-21 | Hitachi Ltd | Optical information recording medium and cutting device |
| JPS62177735A (en) * | 1986-01-30 | 1987-08-04 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS62200544A (en) * | 1986-02-27 | 1987-09-04 | Toshiba Corp | Optical recording medium |
| JPS62271240A (en) * | 1986-05-20 | 1987-11-25 | Toshiba Corp | Optical recording medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004030919A1 (en) * | 2002-09-30 | 2004-04-15 | Matsushita Electric Industrial Co., Ltd. | Optical information recording substrate and recording/ reproducing device using it |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506867B2 (en) | 1996-06-12 |
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| LAPS | Cancellation because of no payment of annual fees |