JPH03133689A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH03133689A JPH03133689A JP1272527A JP27252789A JPH03133689A JP H03133689 A JPH03133689 A JP H03133689A JP 1272527 A JP1272527 A JP 1272527A JP 27252789 A JP27252789 A JP 27252789A JP H03133689 A JPH03133689 A JP H03133689A
- Authority
- JP
- Japan
- Prior art keywords
- film
- recording medium
- thin film
- carbon thin
- corrosion resistance
- 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
- 230000003287 optical effect Effects 0.000 title claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010409 thin film Substances 0.000 claims description 19
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract description 5
- 239000011147 inorganic material Substances 0.000 abstract description 4
- 239000011368 organic material Substances 0.000 abstract description 4
- 238000002834 transmittance Methods 0.000 abstract description 2
- 238000002310 reflectometry Methods 0.000 abstract 2
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 239000010408 film Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000007774 longterm Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910052714 tellurium Inorganic materials 0.000 description 4
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- 150000001721 carbon Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 238000007740 vapor deposition Methods 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］
この発明は、レーザ光により情報の記録再生を行う光デ
ィスクに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc on which information is recorded and reproduced using laser light.
［従来の技術］
従来のこの種の光ディスクにおいては、透明な基板上に
干渉膜を介して記録媒体層が形成され、その記録蝶棒層
上には保護膜及び反射膜が形成されている。又、記録媒
体層の材料としては、テルル等の金属を主成分とするも
の、テルル酸化物を主成分とするもの、インジュウム酸
化物を主成分とするもの、あるいはシアニン系色素を中
心とする有機色素系材料等が用いられ、記録媒体層の形
成法としては、蒸着、スパッタリング、回転塗布法等が
使用されている。[Prior Art] In this type of conventional optical disc, a recording medium layer is formed on a transparent substrate via an interference film, and a protective film and a reflective film are formed on the recording pin layer. The material for the recording medium layer may be one containing a metal such as tellurium as a main component, a material containing tellurium oxide as a main component, a material containing indium oxide as a main component, or an organic material mainly containing cyanine dye. A dye-based material or the like is used, and the recording medium layer is formed by vapor deposition, sputtering, spin coating, or the like.
そして、情報の記録に際しては、レーザ光を基板側から
記録媒体層に照射し、記録媒体層に孔をあけたり、記録
媒体層の相又は分子横道を変えたりして、記ｉｎ体層の
反射率を変化させることにより、情報が担持される。When recording information, a laser beam is irradiated onto the recording medium layer from the substrate side, and by making holes in the recording medium layer or changing the phase or molecular paths of the recording medium layer, the reflection of the recording medium layer is By changing the rate, information is carried.
［発明が解決しようとする課題］
ところが、この従来技術では、記録媒体層に使用されて
いるテルルやインジュウム等の材料に毒性が認められる
ため、光ディスクの製造、使用及び廃棄時において、人
体に悪影響を及ぼず危険かあると共に、記録媒体層の材
料が耐食性に乏しいため、長期間の信頼性に欠けるとい
う問題点があった。[Problems to be Solved by the Invention] However, in this conventional technology, materials such as tellurium and indium used in the recording medium layer are found to be toxic, so there is a risk of adverse effects on the human body during the manufacture, use, and disposal of optical discs. In addition, the material of the recording medium layer has poor corrosion resistance, resulting in a lack of long-term reliability.
この発明は、このような従来の技術に存在する問題点に
着目してなされたものであって、その目的とするところ
は、記録螺体に毒性が認められず、製造、使用及び廃棄
時において、人体に悪影響を及ぼす危険を確実に防止す
ることができると共に、記録媒体に優れた耐食性があっ
て、長期信頼性を保証することができる光ディスクを提
供することにある。This invention was made by focusing on the problems that exist in the conventional technology, and its purpose is to ensure that the recording screw is not toxic and that it can be used during manufacturing, use, and disposal. It is an object of the present invention to provide an optical disc that can reliably prevent danger of adversely affecting the human body, has a recording medium with excellent corrosion resistance, and can guarantee long-term reliability.
１課題を解決するための手段］
上記の目的を達成するために、この発明においては、レ
ーザ光により情報の記録再生を行う光ディスクにおいて
、情報を記録するだめの追記型記録媒体として炭素薄膜
を設けたものである。1. Means for Solving the Problem] In order to achieve the above object, the present invention provides a carbon thin film as a write-once recording medium for recording information in an optical disk in which information is recorded and reproduced using a laser beam. It is something that
［作 用］
上記のように構成された光ディスクにおいては、記録媒
体を構成する炭素薄膜が毒性を有していないため、製造
、使用及び廃棄時において、人体に悪影響を及ぼす危険
がなく、安全に取り扱うことができる。又、炭素薄膜が
耐食性に優れているため、長期使用に耐えることもでき
る。[Function] In the optical disc configured as described above, the carbon thin film constituting the recording medium is non-toxic, so there is no risk of adverse effects on the human body during manufacture, use, and disposal, and the disc can be safely used. can be handled. Furthermore, since the carbon thin film has excellent corrosion resistance, it can withstand long-term use.
し実施例］
以下、この発明を具体化した光ディスクの一実施例を、
図面に基づいて詳細に説明する。Embodiment] Hereinafter, an embodiment of an optical disc embodying the present invention will be described.
This will be explained in detail based on the drawings.
第１図に示すように、透明な基板１上には干渉膜２を介
して記録媒体としての炭素薄膜３が形成され、その炭素
薄膜３上には保護膜４が形成されている。そして、この
炭素薄膜３は真空蒸着やスパッタリング等の４１１９形
成法によって、０．１μｍ以下の厚みとなるように形成
されている。As shown in FIG. 1, a carbon thin film 3 serving as a recording medium is formed on a transparent substrate 1 via an interference film 2, and a protective film 4 is formed on the carbon thin film 3. This carbon thin film 3 is formed to have a thickness of 0.1 μm or less by a 4119 formation method such as vacuum evaporation or sputtering.
又、前記干渉膜２及び保護膜４としては、所定以上の光
透過率を有する無機系又は有機系材料が使用される。無
機系材料としては、５ｉ０２．Ａｌ１０３ 、Ｓｉ Ｎ
Ｘ等の半金属の酸化物や窒化物、又はＴｉ０１Ｔｉ Ｎ
ｘ等の金属の酸化物や窒化物があり、有機系材料として
は、アクリル樹脂、ポリカーボネート樹脂、フェノール
樹脂等がある。Further, as the interference film 2 and the protective film 4, an inorganic or organic material having a light transmittance above a predetermined value is used. As the inorganic material, 5i02. Al103, SiN
Oxides and nitrides of metalloids such as X, or Ti01TiN
There are metal oxides and nitrides such as x, and organic materials include acrylic resin, polycarbonate resin, phenol resin, etc.
そして、無機系材料の場合には、前記炭素薄膜３と同様
に、真空蒸着やスパッタリング等の薄膜形成法によって
形成される。In the case of an inorganic material, like the carbon thin film 3, it is formed by a thin film forming method such as vacuum evaporation or sputtering.
さらに、前記保護膜４上には必要に応じて、高反射率を
有する反射ｖ！５が形成されている。この反射膜５はア
ルミニウム等からなり、ピンホールを考慮しても十分な
反射率が得られるように、真空蒸着やスパッタリング等
の薄膜形成法によって、０．２μｍ以上の厚みに形成さ
れている。Further, if necessary, a reflection v! having a high reflectance may be provided on the protective film 4. 5 is formed. This reflective film 5 is made of aluminum or the like, and is formed to a thickness of 0.2 μm or more by a thin film forming method such as vacuum evaporation or sputtering so that sufficient reflectance can be obtained even when pinholes are taken into account.
さて、前記のように構成された光ディスクに情報を記録
する場合には、レーザ光６が基板１．１ｔＩｌから炭素
薄膜３に照射される。第２図に示すように、レーザ光６
が照射された部分では炭素薄膜３に膨み部３ａが生じて
情報の記録が行われ、レーザ光、６の照射されていない
部分に対して膨み部３ａの反射率が変化する。このとき
形成されたビットは、滑らかでノイズの発生が少なく、
Ｓ／Ｎ比の良好なものを得ることができる。Now, when recording information on the optical disc configured as described above, the laser beam 6 is irradiated onto the carbon thin film 3 from the substrate 1.1tIl. As shown in Figure 2, the laser beam 6
A bulge 3a is generated in the carbon thin film 3 in the irradiated portion, and information is recorded, and the reflectance of the bulge 3a changes with respect to the portion not irradiated with the laser beam 6. The bits formed at this time are smooth and generate less noise.
A good S/N ratio can be obtained.
又、再生時には、記録部と非記録部との反射率の違いを
利用することにより、前記と同様の方法で情報の再生を
行うことかできる。Furthermore, during reproduction, information can be reproduced in the same manner as described above by utilizing the difference in reflectance between the recorded portion and the non-recorded portion.
ところで、この実施例の光ディスクにおいては、記録媒
体として炭素薄膜３が設けられ、この炭素薄ｖ３が、従
来の記録媒体に使用されていたテルルやインジュウム等
の材Ｊ１とは異なり、毒性を有していないため、製造、
使用及び廃棄時において、人体に悪影響を及ぼず危険が
なく、安全に取り汲うことができる。又、炭素薄膜３は
従来の材料に比較して耐食性に優れているため、長期使
用に耐えることができて、長期の信頼性を保証すること
ができる。By the way, in the optical disc of this embodiment, a carbon thin film 3 is provided as a recording medium, and this carbon thin film V3 is different from the material J1, such as tellurium or indium, used in conventional recording media, and is toxic. Because it is not manufactured,
During use and disposal, it has no adverse effect on the human body, is not dangerous, and can be safely disposed of. Furthermore, since the carbon thin film 3 has superior corrosion resistance compared to conventional materials, it can withstand long-term use and guarantee long-term reliability.
さらに、この実施例の光ディスクでは、炭素薄膜３の形
成を従来よりも簡便で安全に行うことかできるため、光
デイスク全体を安価に提供することができる。Furthermore, in the optical disc of this embodiment, the carbon thin film 3 can be formed more easily and safely than before, so the entire optical disc can be provided at low cost.
なお、この発明は前記実施例の構成に限定されるもので
はなく、例えば、炭素薄膜３の厚みを任意に変更して形
成する等、この発明の趣旨から逸脱しない範囲で、各部
の構成を変更して具体化することも可能である。Note that the present invention is not limited to the configuration of the above-mentioned embodiments, and the configuration of each part may be changed without departing from the spirit of the present invention, such as by arbitrarily changing the thickness of the carbon thin film 3. It is also possible to embody it as follows.
［発明の効果］
この発明の光ディスクは、以上説明したように構成され
ているため、記録媒体に毒性が認められず、製造、使用
及び廃棄時において、人体に悪影響を及ぼす危険を確実
に防止することができると共に、記録媒体に優れた耐食
性があって、長期信頼性を保証することができるという
優れた効果を奏する。[Effects of the Invention] Since the optical disc of the present invention is configured as described above, the recording medium is not toxic, and the risk of adverse effects on the human body is reliably prevented during manufacture, use, and disposal. In addition, the recording medium has excellent corrosion resistance and long-term reliability can be guaranteed.
第１図はこの発明を具体化した光ディスクの部分断面図
、第２図は記録媒体としての炭素薄膜にレーザ光を照射
した場合の変化状態を示す部分断面図である。
３・・・記録媒体としての炭素薄膜、６・・・レーザ光
。FIG. 1 is a partial sectional view of an optical disk embodying the present invention, and FIG. 2 is a partial sectional view showing the state of change when a carbon thin film as a recording medium is irradiated with laser light. 3... Carbon thin film as a recording medium, 6... Laser light.
Claims (1)
スクにおいて、 情報を記録するための追記型記録媒体として炭素薄膜（
３）を設けたことを特徴とする光ディスク。[Claims] 1. In an optical disc on which information is recorded and reproduced using a laser beam (6), a carbon thin film (
3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1272527A JPH03133689A (en) | 1989-10-19 | 1989-10-19 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1272527A JPH03133689A (en) | 1989-10-19 | 1989-10-19 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03133689A true JPH03133689A (en) | 1991-06-06 |
Family
ID=17515139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1272527A Pending JPH03133689A (en) | 1989-10-19 | 1989-10-19 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03133689A (en) |
-
1989
- 1989-10-19 JP JP1272527A patent/JPH03133689A/en active Pending
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