JPH0261836A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH0261836A JPH0261836A JP63212199A JP21219988A JPH0261836A JP H0261836 A JPH0261836 A JP H0261836A JP 63212199 A JP63212199 A JP 63212199A JP 21219988 A JP21219988 A JP 21219988A JP H0261836 A JPH0261836 A JP H0261836A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- light
- recording
- substrate
- recording medium
- 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 abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000031700 light absorption Effects 0.000 claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 238000002834 transmittance Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 238000002310 reflectometry Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 76
- 239000010408 film Substances 0.000 description 32
- 238000000034 method Methods 0.000 description 12
- 230000035945 sensitivity Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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］
本発明はレーザ光を照射することにより情報の記録およ
び再生を行う光学記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical recording medium on which information is recorded and reproduced by irradiation with laser light.
［従来の技術］
レーザ光によって情報の記録および再生を行う光学記録
媒体は、半導体レーザ、記録材料および成膜方法などの
基本技術の向上と、大容量記録が可能であるという特徴
により、最近急速に実用化の道か開かれてきた。上記光
学記録媒体の記録方法としては、レーザ光の照射による
熱エネルギーによって、（１）記録膜を変形してピット
またはバブルを形成する方法、（２）記録膜の反射率等
の光学的性質を変化させる方法などが提案されている。[Prior Art] Optical recording media, which record and reproduce information using laser light, have recently become rapidly popular due to improvements in basic technologies such as semiconductor lasers, recording materials, and film-forming methods, as well as the ability to record large amounts of data. The path to practical application has been opened. Recording methods for the above-mentioned optical recording medium include (1) deforming the recording film to form pits or bubbles, and (2) changing optical properties such as reflectance of the recording film using thermal energy from laser beam irradiation. Methods to change this have been proposed.
上記（１）の記録方法において、高記録感度を実現する
ために、種々の検討がなされている。例えば、記録膜の
上に保護層を設けると、記録感度が著しく低下するので
、特公昭６２−３５１７１号等にはエアサンドウィッチ
構造の技術が開示されている。In the recording method (1) above, various studies have been made to achieve high recording sensitivity. For example, if a protective layer is provided on the recording film, the recording sensitivity will be significantly lowered, so a technique of air sandwich structure is disclosed in Japanese Patent Publication No. 35171/1983.
また、記録膜と基板の間に中間層を設けることによって
高感度化をはかる技術があり、例えば、特開昭５８−１
６６５４８号には、起爆力を有するニトロセルロース層
を設ける技術が開示されている。Additionally, there is a technique for increasing sensitivity by providing an intermediate layer between the recording film and the substrate, for example, JP-A-58-1
No. 66548 discloses a technique for providing a nitrocellulose layer with explosive power.
また、特開昭６３−１９１３３２号には、プラスチック
基板と記録膜との間に、屈折率が上記プラスチック基板
の屈折率よりも低い透明薄Ｉｌｉ層を介在させることに
より、反射率を高めた光ディスクに関する技術が開示さ
れている。Furthermore, JP-A No. 63-191332 discloses an optical disc with increased reflectance by interposing a transparent thin Ili layer with a refractive index lower than that of the plastic substrate between the plastic substrate and the recording film. A technology related to this has been disclosed.
［発明が解決しようとする課題］
ところが、上記エアーサンドウィッチ構造では、光学記
録媒体の機械的強度が弱く、全体の厚みが大きくなる問
題がある。また、ニトロセルロースの中間層は、耐湿性
が悪く、高湿下では記録が不可能になる問題がある。さ
らに、いずれの方法でも、高反射率および高コントラス
トを有し、かつ、高記録感度の光学記録媒体を得るため
には、特定組成の記録膜を用いる必要があり、上記特徴
を有する光学記録媒体を得ることは容易ではなかった。[Problems to be Solved by the Invention] However, the air sandwich structure described above has a problem in that the mechanical strength of the optical recording medium is weak and the overall thickness is large. Furthermore, the nitrocellulose intermediate layer has poor moisture resistance, making recording impossible under high humidity conditions. Furthermore, in any of the methods, in order to obtain an optical recording medium with high reflectance, high contrast, and high recording sensitivity, it is necessary to use a recording film of a specific composition, and an optical recording medium with the above-mentioned characteristics must be used. It wasn't easy to get it.
一方、特開昭６３−１９１３３２号に関わる技術では、
上記の条件を満たすものであれば特に材料は限定されな
いが、十分な効果を得るためには、上記透明薄膜層を反
射型多重干渉膜となる厚さにする必要があり、膜厚の制
御が困難であった。On the other hand, the technology related to JP-A No. 63-191332,
The material is not particularly limited as long as it satisfies the above conditions, but in order to obtain sufficient effects, the transparent thin film layer needs to be thick enough to form a reflective multi-interference film, and the film thickness cannot be controlled. It was difficult.
この発明は上記課題に鑑みてなされたもので、所定の波
長領域の光を強く吸収して、該光によって記録膜を変形
して、ピットまたはバブルを形成することにより情報が
書き込まれる光学記録媒体において、高反射率、高コン
トラストを有し、良好な記録・再生特性が容易に得られ
、かつ、機械的耐久性および耐湿性といった安定性にも
すぐれた、光学記録媒体を・提供することを目的として
いる。This invention was made in view of the above problems, and is an optical recording medium in which information is written by strongly absorbing light in a predetermined wavelength range and deforming the recording film by the light to form pits or bubbles. It is an object of the present invention to provide an optical recording medium that has high reflectance, high contrast, can easily obtain good recording and reproducing characteristics, and has excellent stability such as mechanical durability and moisture resistance. The purpose is
［課題を解決するための手段］
上記目的を達成するために、この出願の請求項（１）の
光学記録媒体では、基板上にＦおよびＣからなる層が設
けられ、上記ＦおよびＣからなる層に、光反射層および
光吸収層からなる記録層が形成されている。そして、上
記記録層に記録のための光（例えばレーザ光）を照射す
ることによって、上記各層を変形することにより情報を
記録する。[Means for Solving the Problems] In order to achieve the above object, in the optical recording medium of claim (1) of this application, a layer made of F and C is provided on the substrate, and a layer made of the above F and C is provided on the substrate. A recording layer consisting of a light reflecting layer and a light absorbing layer is formed in the layer. Information is recorded by irradiating the recording layer with recording light (for example, laser light) to deform each layer.
上記光学記録媒体では、上記光吸収層が記録光を吸収し
て、温度が上昇し、光吸収層と光反射層を同時に融解し
、ピットまたはバブルが表面張力により広がって記録が
行われる。In the optical recording medium, the light absorption layer absorbs the recording light, the temperature rises, the light absorption layer and the light reflection layer simultaneously melt, and the pits or bubbles expand due to surface tension to perform recording.
この出願の請求項（２）の光学記録媒体は、基板上にＦ
およびＣからなる層、光反射層および光吸収層を上記の
順に積層し、記録、再生に用いられる光の波長に対する
、上記光反射層の反射率が」５％以上８０％以下、かつ
、透過率が１０％以上８５％以下であり、上記記録再生
光の波長に対する光吸収層の吸収率が１５％以上であっ
て、上記記録再生光は基板を通過して上記記録層に照射
される。基板上にＦおよびＣからなる層を設け、光反射
層および光吸収層をこの順に積層すると、高反射率の光
学記録媒体か容易に得られる。請求項（２）において、
記録、再生に用いられる光の波長に対する、光反射層の
反射率は上記の範囲内が好ましい。この範囲をこえ、低
すぎると記録時の光学的コントラストがとりにくり、逆
に高すぎると書き込み感度が低下する。また、この光反
射層は光吸収層へ光を透過しなければならないので、上
記波長に対する、透過率が上記の範囲内であるのが好ま
しい。The optical recording medium according to claim (2) of this application has F on a substrate.
and C, a light reflection layer and a light absorption layer are laminated in the above order, and the light reflection layer has a reflectance of 5% or more and 80% or less for the wavelength of light used for recording and reproduction, and is transparent. The recording and reproducing light passes through the substrate and is irradiated onto the recording layer. By providing a layer made of F and C on a substrate and laminating a light reflecting layer and a light absorbing layer in this order, an optical recording medium with high reflectance can be easily obtained. In claim (2),
The reflectance of the light reflective layer with respect to the wavelength of light used for recording and reproduction is preferably within the above range. Beyond this range, if it is too low, the optical contrast during recording will be poor, while if it is too high, writing sensitivity will decrease. Further, since this light reflecting layer must transmit light to the light absorbing layer, it is preferable that the transmittance for the above wavelength is within the above range.
さらに上記光吸収層の吸収率は１５％以上であることが
好ましい。この範囲をこえ低すぎると、光の吸収が行わ
れに＜＜、熱の発生が少ないため、全く記録ができない
か、記録に高パワーを必要とするので、好ましくない。Further, the absorption rate of the light absorption layer is preferably 15% or more. If it is too low beyond this range, light absorption occurs and less heat is generated, so recording may not be possible at all or high power will be required for recording, which is not preferable.
ここで、この発明の光学記録媒体では、記録再生光に対
して、光反射層、光吸収層の順で積層されている場合は
、上記光反射層は上記記°録再生光を実質的に透過する
（反射率が１００％未満である）条件で選ばれた材料お
よび膜厚で形成されなければならない。また、上記と逆
の順で積層されている場合は、上記光吸収層は上記記録
再生光を実質的に透過する（吸収率が１００％未満であ
る）条件で選ばれた材料および膜厚で形成されなければ
ならない。Here, in the optical recording medium of the present invention, when a light reflection layer and a light absorption layer are laminated in this order, the light reflection layer substantially absorbs the recording and reproduction light. It must be formed using a material and film thickness selected under the condition that it is transparent (reflectance is less than 100%). In addition, if the layers are stacked in the reverse order, the light absorption layer is made of a material and a film thickness selected under conditions that substantially transmit the recording and reproducing light (absorption rate is less than 100%). must be formed.
本発明における光反射層、光吸収層の材料お上び膜厚は
特に限定されるものではなく、上述の条件を満たし、高
反射率および高コントラストの得られる組み合わせで適
宜設定すればよい。特に、各層の膜厚は記録前の反射率
が５％以上７５％以下の範囲である様に設定されるのが
良い。この範囲を超え、低すぎると記録、再生時にトラ
ッキングが十分に行えず、安定した記録、再生が困難と
なる。又、高すぎると記録光を十分に吸収することがで
きず、全く記録ができないか、記録に高パワーを要する
ので好ましくない。そして、本発明の各層は多重干渉膜
となる必要はなく、各々の膜厚は高反射率および高コン
トラストが得られる範囲内で多少変動してもよい。The materials and film thicknesses of the light reflecting layer and the light absorbing layer in the present invention are not particularly limited, and may be appropriately set to a combination that satisfies the above-mentioned conditions and provides high reflectance and high contrast. In particular, the thickness of each layer is preferably set so that the reflectance before recording is in the range of 5% to 75%. If it exceeds this range or is too low, tracking will not be sufficient during recording or reproduction, making stable recording or reproduction difficult. On the other hand, if it is too high, recording light cannot be absorbed sufficiently, and recording may not be possible at all, or high power is required for recording, which is undesirable. Each layer of the present invention does not need to be a multiple interference film, and the thickness of each layer may vary somewhat within a range that provides high reflectance and high contrast.
各層の材料は、光反射層としては、Ｐｔ５Ａｕ、 Ａｇ
。The materials of each layer include Pt5Au and Ag for the light reflecting layer.
.
Ｃｕ、 ＡＩ、Ｃｒ、 ＮｉおよびＴ１のうち少なくと
も１つ、光吸収層としては、Ｂｉ、 Ｓｂ％Ｉｎ、 Ｐ
ｂ、 ５ｎＳＴｅＳＳｅ。At least one of Cu, AI, Cr, Ni and T1, as a light absorption layer, Bi, Sb%In, P
b, 5nSTeSSe.
Ｓのうち少なくとも１つを必須成分として含む膜なお、
上記のＦおよびＣからなる層のＦの含有量は、Ｆ／（Ｆ
＋Ｃ）で表されるＦの原子数パーセントで４０％以上６
５％以下であることが好ましい。A membrane containing at least one of S as an essential component,
The content of F in the layer consisting of F and C is F/(F
+C) 40% or more in terms of the number of atoms of F6
It is preferably 5% or less.
この範囲を越え、少なすぎると、高感度化の効果がうす
れ、逆に多すぎると、金属膜との密着性が低下し、膜が
はがれやすくなる。If the amount exceeds this range and is too small, the effect of increasing sensitivity will be diminished, and if it is too large, the adhesion to the metal film will decrease and the film will easily peel off.
この出願の光学記録媒体において、記録再生光に対して
、記録層を光反射層、光吸収層の順で形成したときの光
反射層は、光吸収層の光吸収能を高める（エンハンス効
果）ために形成されるのではなく、光学記録媒体に高反
射率、高コントラストの特徴を与えるために設けられる
ものである。In the optical recording medium of this application, when the recording layer is formed in the order of a light reflection layer and a light absorption layer, the light reflection layer increases the light absorption ability of the light absorption layer (enhancement effect) with respect to recording and reproduction light. It is not formed for the purpose of providing high reflectance and high contrast characteristics to the optical recording medium.
以上水した各層は、スパッタリング法、真空蒸着法、Ｃ
ＶＤ法等の常法により形成することが可能であり、成膜
方法は特に限定されるものではない。Each of the above water-filled layers can be formed by sputtering, vacuum evaporation, C
It can be formed by a conventional method such as a VD method, and the film forming method is not particularly limited.
用いられる基板としては、記録再生光を透過するのに十
分透明であれば何でも使用できる。例えば、ガラス、ポ
リエステル樹脂、ポリオレフィン樹脂、ポリアミド樹脂
、ポリカーボネイト樹脂およびポリメタクリル樹脂等の
透明性にすぐれた材料が使用できる。上記透明性基板上
に各層を積層し、この基板と任意の不透明性基板を貼り
合わせ―も良い。また、透明または不透明基板上に上記
ス
各層を形成し、任意の（基板が不透明の場合は透明性を
有する）保護層を積層することもできる。Any substrate can be used as long as it is transparent enough to transmit recording and reproducing light. For example, materials with excellent transparency such as glass, polyester resin, polyolefin resin, polyamide resin, polycarbonate resin, and polymethacrylic resin can be used. Alternatively, each layer may be laminated on the transparent substrate, and this substrate may be bonded to any opaque substrate. It is also possible to form each of the above layers on a transparent or opaque substrate, and then laminate any protective layer (transparent when the substrate is opaque).
基板の形状は円形、方形等であっても良く、ディスク状
、カード状等であってもよい。上記基板は、例えばトラ
ッキング等のための案内溝のような凹凸を有していても
良い。The shape of the substrate may be circular, rectangular, etc., or may be disk-shaped, card-shaped, etc. The substrate may have irregularities such as guide grooves for tracking, for example.
記録等のために用いるレーザ光の波長は特に限定するも
のではないが、ｌｏｏｏｎｍ以下のものが使用に適して
いる。したがって、現在の半導体レーザで、波長が７５
０〜８５０■領域のものが有効に使われる。この場合記
録時のパワーとしては、一般にｌ〜１５ｍＷ程度の範囲
が用いられる。Although the wavelength of the laser beam used for recording etc. is not particularly limited, a wavelength of 100 nm or less is suitable for use. Therefore, with current semiconductor lasers, the wavelength is 75
Those in the 0 to 850 ■ range are effectively used. In this case, the power used during recording is generally in the range of about 1 to 15 mW.
［作 用コ
この出願の光吸収層は主として記録光を吸収して温度が
上昇し、光反射層を同時に融解し、ピットを表面張力に
より設ける。光反射層には、記録再生光に対する光学記
録媒体の反射率を調節し、高反射率および高コントラス
トを実現する作用がある。またＦおよびＣからなる層は
、膜のぬれ性が悪いので、この層を設けることにより、
ピット等が広がりやすく、高感度化が達成される。[Function] The light-absorbing layer of this application mainly absorbs recording light and its temperature rises, melting the light-reflecting layer at the same time and forming pits due to surface tension. The light-reflecting layer has the function of adjusting the reflectance of the optical recording medium with respect to recording and reproducing light, and achieving high reflectance and high contrast. In addition, since the layer consisting of F and C has poor film wettability, by providing this layer,
Pit etc. spread easily and high sensitivity is achieved.
以下に実施例をもって本発明をより詳しく説明する。The present invention will be explained in more detail with reference to Examples below.
［実施例１］
記録部であるランド部およびトラック案内溝であるグル
ープ部を有する、ポリカーボネイト製透明円板上に、フ
ロロカーボン層、Ａｕからなる光反射層およびＴｅａ。[Example 1] A fluorocarbon layer, a light reflection layer made of Au, and Tea were placed on a polycarbonate transparent disk having land portions serving as recording portions and group portions serving as track guide grooves.
Ｓｅｔ。からなる光吸収層の３層を上記の順にスパッタ
リング法により成膜した。以下にその成膜条件を示す。Set. Three layers of light absorption layers were formed in the above order by sputtering method. The film forming conditions are shown below.
まずチャンバー内を５×ｔｏ−＠Ｔｏｒｒまで真空引き
したのち、Ａｒガスを、ガス圧ｈ４５ｘ ｔｏ−’Ｔｏ
ｒｒになるように導入した。こののち、ポリテトラフロ
ロエチレンのターゲットに高周波パワーを印加し、フロ
ロカーボン層を成膜した。First, the inside of the chamber was evacuated to 5×to-@Torr, and then Ar gas was pumped to the gas pressure h45x to-'Torr.
It was introduced so that it became rr. Thereafter, high frequency power was applied to the polytetrafluoroethylene target to form a fluorocarbon layer.
このフロロ・カーボン膜をＥ、ＳＣＡによって分析する
と、Ｆの含有量は、Ｆ／（Ｆ＋ｃ）で表されるＦの原子
数パーセントが５７％であった。そして、上記フロロカ
ーボン膜上にＡｕからなる光反射層を成膜した。成膜に
は＾Ｕツタ−ットを用い、Ａｕ膜厚は１１０人であった
。さらに、上記Ａｕ膜上にＴｅ−Ｓｅ組成の合金ターゲ
ットを用いｔ１膜厚が４５０人で、原子数比がＴｅａ。When this fluorocarbon film was analyzed by E and SCA, the F content, expressed as F/(F+c), was 57% by number of F atoms. Then, a light reflecting layer made of Au was formed on the fluorocarbon film. The film was formed using a ^U tutter, and the thickness of the Au film was 110. Further, an alloy target having a Te--Se composition was used on the Au film, and the t1 film thickness was 450 mm, and the atomic ratio was Tea.
Ｓｅｔ。の光吸収層を設けた。上記の方法により作製し
た円板状光学記録媒体は、記録再生光に対する書き込み
府の反射率が６５％で、高反射率であった。そして、記
録再生特性は非常に良好で、５ｍＷからＣＮＲが４５ｄ
Ｂで書き込み可能であり、最高ＣＮＲは５０ｄＢに到達
した。また、この光学記録媒体を７５℃ ８５％Ｒ１（
において保持する条件で加速劣化試験を行い、アーカイ
バルライフおよびシェルフライフの測定を行ったが、記
録再生特性に劣化の兆しは見られなかった。Set. A light absorption layer was provided. The disk-shaped optical recording medium produced by the above method had a high reflectance of 65% at the writing area with respect to the recording and reproducing light. The recording and reproducing characteristics are very good, with a CNR of 45d from 5mW.
It was possible to write in B, and the maximum CNR reached 50 dB. In addition, this optical recording medium was heated at 75°C 85% R1 (
An accelerated deterioration test was carried out under the conditions of holding the material at 100 mL, and archival life and shelf life were measured, but no signs of deterioration were observed in the recording and reproducing characteristics.
［実施例２］
記録部であるランド部およびトラック案内溝であるグル
ープ部を存する、カード状のポリカーボネイト製の透明
シートを熱プレス法によって成形した。この基板上にフ
＃−ロカーボン層、およびＣｕからなる光反射層および
Ｔｅａ。Ｂｉｔ。からなる光吸収層をスパッタリング法
により成膜した。次にその成膜条件を示す。実施例１と
同様に、真空引きしたチャンバー内にＡｒガスを導入し
、ガス圧を５Ｘ ｔＧ−”Ｔｏｒｒに設定した。ここで
、ポリテトラフロロエチレンのターゲットに高周波パワ
ーを印加し、成膜した。ＥＳＣＡによって上記膜を分計
すると、Ｆの含有量は、Ｆ／（Ｆ＋Ｃ）で表わされる原
子数パーセントが４３％であった。上記フロロカーボン
層上に、Ｃｕターゲットを用いて、膜厚が１２０人のＣ
ｕ光反射層を成膜した。ざらに膜厚が４００人のＴｅａ
。Ｂｉｌ。光吸収層を、Ｔｅ−Ｂ１合金ターゲットによ
り、上記光反射膜上に設けた。上記の３層を成膜した透
明シートと、白色のポリカーボネイト板をウレタン系の
接着剤で貼り合わせて、カード状の光学記録媒体を作成
した。このカード伏光学記録媒体の記録再生特性を評価
すると、記録再生光に対する、記録前の反射率が５５％
、記録後の反射率が２０％であり、高コントラストでの
記録が可能であった。また、この光学記録媒体を７５℃
８５％ＲＨにおいて１０００時間保持する条件で加速劣
化試験を行い、アーカイバルライフおよびシェルフライ
フの測定を行ったが、記録再生特性に劣化の兆しは見ら
れなかった。さらに、この光学記録媒体に曲げや捩り等
を与え、記録膜の機械的耐久性試験を行ったが、記録再
生特性への影響は全くなかった。[Example 2] A card-shaped transparent sheet made of polycarbonate having land portions as recording portions and group portions as track guide grooves was molded by a hot press method. A fluorocarbon layer, a light reflection layer made of Cu, and Tea are formed on this substrate. Bit. A light absorption layer consisting of the following was formed by sputtering method. Next, the film forming conditions will be shown. As in Example 1, Ar gas was introduced into the evacuated chamber and the gas pressure was set to 5X tG-''Torr.Here, high frequency power was applied to the polytetrafluoroethylene target to form a film. When the above film was measured by ESCA, the F content expressed as F/(F+C) was 43% by number of atoms.A Cu target was used on the above fluorocarbon layer to obtain a film thickness of 120%. human C
A u-light reflective layer was formed. Tea with a rough film thickness of 400 people
. Bill. A light absorption layer was provided on the light reflection film using a Te-B1 alloy target. A card-shaped optical recording medium was created by bonding the transparent sheet with the three layers described above and a white polycarbonate plate together using a urethane adhesive. When evaluating the recording and reproducing characteristics of this card-backed optical recording medium, the reflectance of the recording and reproducing light before recording was 55%.
The reflectance after recording was 20%, and recording with high contrast was possible. In addition, this optical recording medium was heated at 75°C.
An accelerated deterioration test was conducted under conditions of holding the sample for 1000 hours at 85% RH, and archival life and shelf life were measured, but no signs of deterioration were observed in the recording and reproducing characteristics. Furthermore, a mechanical durability test of the recording film was conducted by subjecting this optical recording medium to bending, twisting, etc., but there was no effect on the recording/reproducing characteristics at all.
［発明の効果］
以上説明したように、この発明によれば、基板上にＦお
よびＣからなる層を設け、さらに光反射層および光吸収
層からなる記録層を形成しているので、光反射層、光吸
収層の材料が特に限定されず、また膜厚が多少変動して
も、高反射率および高コントラストの特徴を有し、高記
録感度で安定性にすぐれた光学記録媒体を得ることがで
きる。[Effects of the Invention] As explained above, according to the present invention, a layer made of F and C is provided on a substrate, and a recording layer made of a light reflection layer and a light absorption layer is further formed, so that light reflection is prevented. To obtain an optical recording medium that has characteristics of high reflectance and high contrast, has high recording sensitivity and excellent stability even if the material of the layer or light absorption layer is not particularly limited and the film thickness varies slightly. Can be done.
特に請求項（２）の構成によると、光反射層が光吸収層
よりも記録再生光の照射側にあるので、容易に高反射率
の光学記録媒体が得られ効果が大きい。In particular, according to the structure of claim (2), since the light reflecting layer is located on the side where the recording and reproducing light is irradiated rather than the light absorbing layer, an optical recording medium with a high reflectance can be easily obtained and the effect is great.
特許出願人 株式会社 り ラ しPatent applicant RiRashi Co., Ltd.
Claims (2)
よびＣからなる層に、光反射層および光吸収層からなる
記録層が形成され、上記記録層に記録光を照射すること
によつて、上記各層を変形することにより情報を記録す
ることを特徴とする光学記録媒体。(1) A layer made of F and C is provided on a substrate, a recording layer made of a light reflection layer and a light absorption layer is formed on the layer made of F and C, and the recording layer is irradiated with recording light. Therefore, an optical recording medium is characterized in that information is recorded by deforming each of the layers.
光吸収層を上記の順に積層し、記録再生光の波長に対す
る、上記光反射層の反射率が１５％以上８０％以下で、
かつ、透過率が１０％以上８５％以下であり、上記記録
再生光の波長に対する上記光吸収層の吸収率が１５％以
上であつて、上記記録再生光は基板を通過して上記記録
層に照射されることを特徴とする請求項１記載の光学記
録媒体。(2) A layer made of F and C, a light reflection layer, and a light absorption layer are laminated in the above order on the substrate, and the reflectance of the light reflection layer is 15% or more and 80% or less with respect to the wavelength of recording and reproducing light,
and the transmittance is 10% or more and 85% or less, and the absorption rate of the light absorption layer with respect to the wavelength of the recording and reproducing light is 15% or more, and the recording and reproducing light passes through the substrate and enters the recording layer. Optical recording medium according to claim 1, characterized in that it is irradiated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212199A JPH0261836A (en) | 1988-08-25 | 1988-08-25 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212199A JPH0261836A (en) | 1988-08-25 | 1988-08-25 | Optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0261836A true JPH0261836A (en) | 1990-03-01 |
Family
ID=16618562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63212199A Pending JPH0261836A (en) | 1988-08-25 | 1988-08-25 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0261836A (en) |
-
1988
- 1988-08-25 JP JP63212199A patent/JPH0261836A/en active Pending
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