JPH0580735B2 - - Google Patents
Info
- Publication number
- JPH0580735B2 JPH0580735B2 JP59175507A JP17550784A JPH0580735B2 JP H0580735 B2 JPH0580735 B2 JP H0580735B2 JP 59175507 A JP59175507 A JP 59175507A JP 17550784 A JP17550784 A JP 17550784A JP H0580735 B2 JPH0580735 B2 JP H0580735B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- film
- metal film
- information recording
- flat information
- 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
- 239000000758 substrate Substances 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 2
- 239000010408 film Substances 0.000 description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 229910052814 silicon oxide Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
＋産業上の利用分野
本発明は、光学的に情報を記録再生または消去
し得る平板状情報記録担体に関する。DETAILED DESCRIPTION OF THE INVENTION +Field of Industrial Application The present invention relates to a flat information recording carrier on which information can be optically recorded, reproduced, or erased.
従来例の構成とその問題点
光学的に情報の記録再生を行なう平板状情報記
録担体は、記録媒体に光を照射して、その特性が
変化することにより情報の記録を行なう。従つて
記録情報を長期保存するためには記録媒体が劣化
して特性が変化してはならない。このため、記録
媒体が水分や酸素などと反応して特性変化を起こ
さないように記録媒体を保護する必要がある。そ
のため、従来から基板を２枚貼り合わせてその間
に記録媒体を封じ込めることによつて保護を行な
つている。その構成を第１図に示す。第１図中、
１と５はガラスまたは樹脂製の基板で、２は案内
溝形成層、３は記録媒体、４は接着層、６は基板
の中心穴である。Conventional Structure and Problems A flat information recording carrier that optically records and reproduces information records information by irradiating the recording medium with light and changing its characteristics. Therefore, in order to preserve recorded information for a long time, the recording medium must not deteriorate and its characteristics should not change. Therefore, it is necessary to protect the recording medium so that it does not react with moisture, oxygen, etc. and change its characteristics. Therefore, protection has conventionally been achieved by bonding two substrates together and sealing the recording medium between them. Its configuration is shown in FIG. In Figure 1,
1 and 5 are glass or resin substrates, 2 is a guide groove forming layer, 3 is a recording medium, 4 is an adhesive layer, and 6 is a center hole of the substrate.
しかしながら、このような構成では、基板が２
枚必要であり、特にガラス基板を使用した場合に
は、担体の重量はかなり重くなる。また、基板の
内周及び外周の縁では記録媒体は外界に露出して
いるかあるいは接着材料によつて覆われている程
度であり、ここから水分等が侵入して記録媒体の
劣化が生じるという問題を有していた。 However, in such a configuration, the substrate is
Especially when a glass substrate is used, the weight of the carrier becomes quite heavy. Additionally, the recording medium at the inner and outer edges of the substrate is either exposed to the outside world or only covered with an adhesive material, and there is a problem that moisture etc. can enter from there and cause deterioration of the recording medium. It had
発明の目的
本発明は、１枚の基板により、軽量かつ記録媒
体の長期安定性を確保することができる平板状情
報記録担体を提供することを目的とするものであ
る。OBJECTS OF THE INVENTION An object of the present invention is to provide a flat information recording carrier that is lightweight and can ensure long-term stability of the recording medium using a single substrate.
発明の構成
この目的を達成するために、本発明の平板状情
報記録担体では、記録媒体保護のために耐湿性の
優れた金属膜を用いることを特長とする。従来の
ような２枚の基板の貼り合わせからなる平板状情
報記録担体では、２枚の基板のうち１枚は、情報
の記録再生を行なうための光線が透過するが、他
の１枚は単に記録媒体の保護に用いられている。
そこで、この保護目的の基板を耐湿性の良い金属
膜に置き換えることにより、重量を約半分に軽量
化することができる。また、この時基板上に設け
られる記録媒体の内外周の縁も金属膜で覆うこと
により、記録媒体を基板と金属膜で完全に密閉す
ることができ、外界からの水分等に侵入を防ぐこ
とができる。記録媒体上に直接金属膜を被覆する
と、情報記録時に光線により発生する熱が記録媒
体から金属膜に逃げるため、記録パワーを大きく
しなければならない。これは、記録媒体と金属膜
との間に断熱層を設けることで、記録パワーの増
大を押さえることができる。さらに、この断熱層
の材質が透明であり、その膜厚をλ／4n（λは再
生光の波長、ｎは断熱層の屈折率）の整数倍にお
くことによつて反射防止膜とすることができ、再
生特性の向上を図ることができる。Structure of the Invention In order to achieve this object, the flat information recording carrier of the present invention is characterized in that a metal film with excellent moisture resistance is used to protect the recording medium. In a conventional flat information recording carrier made of two substrates bonded together, one of the two substrates allows the light beam for recording and reproducing information to pass through, while the other substrate simply transmits the light beam. Used to protect recording media.
Therefore, by replacing this protective substrate with a metal film with good moisture resistance, the weight can be reduced to about half. In addition, by covering the inner and outer edges of the recording medium provided on the substrate with metal films at this time, the recording medium can be completely sealed between the substrate and the metal film, preventing moisture from entering from the outside world. I can do it. If a metal film is directly coated on a recording medium, the heat generated by the light beam during information recording will escape from the recording medium to the metal film, so the recording power must be increased. This is because an increase in recording power can be suppressed by providing a heat insulating layer between the recording medium and the metal film. Furthermore, the material of this heat insulating layer is transparent, and the film thickness is an integral multiple of λ/4n (λ is the wavelength of the reproduction light, n is the refractive index of the heat insulating layer), thereby making it an antireflection film. This makes it possible to improve playback characteristics.
実施例の説明
以下、本発明の実施例について第２図を参照し
ながら説明する。基板７にはガラスを用いる。こ
の上に紫外線硬化樹脂からなる同心円状の案内溝
形成層８を形成し、さらに、記録媒体９としてス
パツタリングによりGdTbFeのアモルフアス垂直
磁化膜を付着させている。この記録媒体９上に断
熱層及び反射防止膜の機能をもつSiOx膜１０を
蒸着する。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIG. Glass is used for the substrate 7. A concentric guide groove forming layer 8 made of an ultraviolet curable resin is formed thereon, and an amorphous perpendicular magnetization film of GdTbFe is further deposited as a recording medium 9 by sputtering. A SiOx film 10 having the functions of a heat insulating layer and an antireflection film is deposited on the recording medium 9.
以上の３層を完全に被覆するようにCr膜１１
を蒸着する。Cr膜１１は耐湿性に優れており、
このCr膜１１とやはり耐湿性の良いガラス基板
７とにより記録媒体９を完全に密閉することによ
つて、記録媒体９に水分等が侵入するのを防ぐこ
とができる。さらにCr膜１１は情報再生時に記
録媒体９を透過した再生光を反射させる働きをも
つ。この時、SiOx膜１０が反射防止コーテイン
グの働きをすることによつて、記録媒体９のみか
けの力−回転角を増大させることができる。この
ようにCr膜１１は耐湿層としての機能と共に反
射層として働くことによつて平板状情報記録担体
の再生性能の向上にも寄与する。最後にCr膜１
１の上に紫外線硬化樹脂１２を設ける。これは、
Cr膜１１にスクラツチ等の傷がつくのを防ぐ働
きをしている。 Cr film 11 so as to completely cover the above three layers.
Deposit. The Cr film 11 has excellent moisture resistance,
By completely sealing the recording medium 9 with this Cr film 11 and the glass substrate 7 which also has good moisture resistance, it is possible to prevent moisture etc. from entering the recording medium 9. Further, the Cr film 11 has the function of reflecting the reproduction light transmitted through the recording medium 9 during information reproduction. At this time, the apparent force-rotation angle of the recording medium 9 can be increased by the SiOx film 10 acting as an anti-reflection coating. In this way, the Cr film 11 functions as a moisture-proof layer and also as a reflective layer, thereby contributing to improving the reproduction performance of the flat information recording carrier. Finally, Cr film 1
An ultraviolet curing resin 12 is provided on top of the resin. this is,
It serves to prevent the Cr film 11 from being scratched or otherwise damaged.
なお、記録媒体９としては本実施例の光磁気記
録材料の他にTeOx（Ｏ＜ｘ＜２）等であつても
よい。また、SiOx膜１０の代わりにTiO2，AlN
等の誘導体を蒸着してもよい。さらに、金属膜１
１が薄くかつ十分な記録パワーが得られる時には
SiOx膜１０の無い構成も可能である。金属膜１
１についてはAu，Ti等の薄膜も耐湿性に優れて
おり、本実施例のCr膜と置き換え可能である。
さらにこの金属膜１１が十分な強度を有していれ
ば、保護層である紫外線硬化樹脂１２は必要な
い。 In addition to the magneto-optical recording material of this embodiment, the recording medium 9 may be made of TeOx (O<x<2) or the like. Also, instead of the SiOx film 10, TiO 2 , AlN
Derivatives such as the like may also be deposited. Furthermore, metal film 1
When 1 is thin and sufficient recording power is obtained,
A configuration without the SiOx film 10 is also possible. metal film 1
Regarding No. 1, thin films such as Au and Ti also have excellent moisture resistance and can be replaced with the Cr film of this example.
Furthermore, if this metal film 11 has sufficient strength, the ultraviolet curing resin 12 as a protective layer is not necessary.
発明の効果
以上の様に本発明の平板状情報記録担体は、記
録媒体の保護のために、耐湿性の優れた金属膜を
用いると共に、この金属膜をさらに樹脂層で覆つ
て、金属膜の機械的保護をも行なうことによつ
て、従来のものと比較して、記録媒体のより一層
の長期安定性を保つことができる。Effects of the Invention As described above, the flat information recording carrier of the present invention uses a metal film with excellent moisture resistance to protect the recording medium, and further covers this metal film with a resin layer. By also providing mechanical protection, a greater long-term stability of the recording medium can be maintained compared to conventional ones.
第１図は従来の平板状情報記録担体を示す断面
図、第２図は本発明の一実施例における平板状情
報記録担体の断面図である。
７……ガラス基板、８……紫外線硬化樹脂によ
る同心円状の案内溝、９……GdTbFeアモルフア
ス垂直磁化膜、１０……SiOx膜、１１……Cr膜、
１２……紫外線硬化樹脂による保護膜、１３……
基板の中心穴。
FIG. 1 is a sectional view showing a conventional flat information recording carrier, and FIG. 2 is a sectional view of a flat information recording carrier according to an embodiment of the present invention. 7...Glass substrate, 8...Concentric guide groove made of ultraviolet curing resin, 9...GdTbFe amorphous perpendicular magnetization film, 10...SiOx film, 11...Cr film,
12...Protective film made of ultraviolet curing resin, 13...
center hole of the board.
Claims (1)
平板状情報記録担体であつて、基板上に螺旋状ま
たは同心円状の案内溝、記録媒体、耐湿性を有す
る金属膜を含む保護層が形成されており、前記記
録媒体が前記基板及び前記金属膜によつて密閉さ
れており、さらに前記金属膜が樹脂層で覆われて
いることを特徴とする平板状情報記録担体。 ２ 耐湿性を有する金属膜と記録媒体の間に断熱
層を設けたことを特徴とする特許請求の範囲第１
項に記載の平板状情報記録担体。 ３ 断熱層の膜厚がλ／4n（λは再生光の波長、
ｎは断熱層の屈折率）の整数倍であることを特徴
とする特許請求の範囲第１項に記載の平板状情報
記録担体。 ４ 金属膜が、記録膜を透過した光を反射する反
射膜であることを特徴とする特許請求の範囲第１
項に記載の平板状情報記録担体。[Scope of Claims] 1. A flat information recording carrier for optically recording, reproducing, or erasing information, which includes a spiral or concentric guide groove on a substrate, a recording medium, and a moisture-resistant metal film. A flat information recording carrier, characterized in that a protective layer is formed, the recording medium is sealed by the substrate and the metal film, and the metal film is further covered with a resin layer. 2. Claim 1, characterized in that a heat insulating layer is provided between the moisture-resistant metal film and the recording medium.
2. The flat information recording carrier described in 2. 3 The thickness of the heat insulating layer is λ/4n (λ is the wavelength of the reproduction light,
2. The flat information recording carrier according to claim 1, wherein n is an integral multiple of the refractive index of the heat insulating layer. 4. Claim 1, wherein the metal film is a reflective film that reflects light transmitted through the recording film.
2. The flat information recording carrier described in 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175507A JPS6154054A (en) | 1984-08-23 | 1984-08-23 | Plate information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175507A JPS6154054A (en) | 1984-08-23 | 1984-08-23 | Plate information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6154054A JPS6154054A (en) | 1986-03-18 |
| JPH0580735B2 true JPH0580735B2 (en) | 1993-11-10 |
Family
ID=15997251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59175507A Granted JPS6154054A (en) | 1984-08-23 | 1984-08-23 | Plate information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6154054A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0746441B2 (en) * | 1986-04-17 | 1995-05-17 | 松下電器産業株式会社 | Optical recording member |
| JPS63144437A (en) * | 1986-12-08 | 1988-06-16 | Daicel Chem Ind Ltd | Optical recording medium |
| JPH02113452A (en) * | 1988-10-21 | 1990-04-25 | Hitachi Ltd | Substrate for optical disk and optical disk formed by using the substrate |
Citations (17)
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|---|---|---|---|---|
| JPS5339708A (en) * | 1976-09-24 | 1978-04-11 | Matsushita Electric Ind Co Ltd | Magnetic recording medium and preparation thereof |
| JPS5489605A (en) * | 1977-09-29 | 1979-07-16 | Philips Nv | Information memory element |
| JPS54106149A (en) * | 1978-02-09 | 1979-08-20 | Tokyo Denka Kk | Optical information recording carrier |
| JPS5570945A (en) * | 1978-11-20 | 1980-05-28 | Matsushita Electric Ind Co Ltd | High density recording disc |
| JPS5597033A (en) * | 1979-01-15 | 1980-07-23 | Philips Nv | Optical recording element and method of recording optical information |
| JPS55161690A (en) * | 1979-06-04 | 1980-12-16 | Xerox Corp | Optical disc |
| JPS5690438A (en) * | 1979-12-19 | 1981-07-22 | Fujitsu Ltd | Optical recording medium |
| JPS56127937A (en) * | 1980-01-23 | 1981-10-07 | Thomson Csf | Method of writing thermo-optical data and data medium for executing same |
| JPS5718028A (en) * | 1980-07-03 | 1982-01-29 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPS5727494A (en) * | 1980-07-23 | 1982-02-13 | Sharp Corp | Magneto-optical storage element |
| JPS57172549A (en) * | 1981-04-17 | 1982-10-23 | C B S Sony Rekoode Kk | Optical recording medium |
| JPS5837855A (en) * | 1981-08-31 | 1983-03-05 | Ayao Wada | Recording and reproducing disk for image, voice, magnetism, signal and the like |
| JPS5852652B2 (en) * | 1980-12-04 | 1983-11-24 | 日本糧冷株式会社 | Cold rice bin device |
| JPS58203096A (en) * | 1982-05-24 | 1983-11-26 | Fujitsu Ltd | Optical information recording medium |
| JPS5938780A (en) * | 1982-04-10 | 1984-03-02 | Sharp Corp | Magnetooptic storage element |
| JPS5956229A (en) * | 1982-09-20 | 1984-03-31 | デイスコビジヨン・アソシエイツ | Recording medium and recording method |
| JPS60219654A (en) * | 1984-04-13 | 1985-11-02 | Sharp Corp | Optical memory element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852652U (en) * | 1981-10-06 | 1983-04-09 | キヤノン株式会社 | photothermal magnetic recording medium |
-
1984
- 1984-08-23 JP JP59175507A patent/JPS6154054A/en active Granted
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339708A (en) * | 1976-09-24 | 1978-04-11 | Matsushita Electric Ind Co Ltd | Magnetic recording medium and preparation thereof |
| JPS5489605A (en) * | 1977-09-29 | 1979-07-16 | Philips Nv | Information memory element |
| JPS54106149A (en) * | 1978-02-09 | 1979-08-20 | Tokyo Denka Kk | Optical information recording carrier |
| JPS5570945A (en) * | 1978-11-20 | 1980-05-28 | Matsushita Electric Ind Co Ltd | High density recording disc |
| JPS5597033A (en) * | 1979-01-15 | 1980-07-23 | Philips Nv | Optical recording element and method of recording optical information |
| JPS55161690A (en) * | 1979-06-04 | 1980-12-16 | Xerox Corp | Optical disc |
| JPS5690438A (en) * | 1979-12-19 | 1981-07-22 | Fujitsu Ltd | Optical recording medium |
| JPS56127937A (en) * | 1980-01-23 | 1981-10-07 | Thomson Csf | Method of writing thermo-optical data and data medium for executing same |
| JPS5718028A (en) * | 1980-07-03 | 1982-01-29 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPS5727494A (en) * | 1980-07-23 | 1982-02-13 | Sharp Corp | Magneto-optical storage element |
| JPS5852652B2 (en) * | 1980-12-04 | 1983-11-24 | 日本糧冷株式会社 | Cold rice bin device |
| JPS57172549A (en) * | 1981-04-17 | 1982-10-23 | C B S Sony Rekoode Kk | Optical recording medium |
| JPS5837855A (en) * | 1981-08-31 | 1983-03-05 | Ayao Wada | Recording and reproducing disk for image, voice, magnetism, signal and the like |
| JPS5938780A (en) * | 1982-04-10 | 1984-03-02 | Sharp Corp | Magnetooptic storage element |
| JPS58203096A (en) * | 1982-05-24 | 1983-11-26 | Fujitsu Ltd | Optical information recording medium |
| JPS5956229A (en) * | 1982-09-20 | 1984-03-31 | デイスコビジヨン・アソシエイツ | Recording medium and recording method |
| JPS60219654A (en) * | 1984-04-13 | 1985-11-02 | Sharp Corp | Optical memory element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6154054A (en) | 1986-03-18 |
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