JPH024042B2 - - Google Patents
Info
- Publication number
- JPH024042B2 JPH024042B2 JP55163894A JP16389480A JPH024042B2 JP H024042 B2 JPH024042 B2 JP H024042B2 JP 55163894 A JP55163894 A JP 55163894A JP 16389480 A JP16389480 A JP 16389480A JP H024042 B2 JPH024042 B2 JP H024042B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- disk
- stamper
- support material
- transfer layer
- 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
- 229920005989 resin Polymers 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 claims description 7
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 4
- -1 benzyl dimethyl ketal Chemical compound 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- FZUGPQWGEGAKET-UHFFFAOYSA-N parbenate Chemical compound CCOC(=O)C1=CC=C(N(C)C)C=C1 FZUGPQWGEGAKET-UHFFFAOYSA-N 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- YNSNJGRCQCDRDM-UHFFFAOYSA-N 1-chlorothioxanthen-9-one Chemical compound S1C2=CC=CC=C2C(=O)C2=C1C=CC=C2Cl YNSNJGRCQCDRDM-UHFFFAOYSA-N 0.000 claims 1
- 239000004925 Acrylic resin Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 13
- 239000003085 diluting agent Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 5
- 239000000178 monomer Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZCDADJXRUCOCJE-UHFFFAOYSA-N 2-chlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC=C3SC2=C1 ZCDADJXRUCOCJE-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000008365 aromatic ketones Chemical class 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 230000001588 bifunctional effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229940042596 viscoat Drugs 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- DKEGCUDAFWNSSO-UHFFFAOYSA-N 1,8-dibromooctane Chemical compound BrCCCCCCCCBr DKEGCUDAFWNSSO-UHFFFAOYSA-N 0.000 description 1
- KMNCBSZOIQAUFX-UHFFFAOYSA-N 2-ethoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OCC)C(=O)C1=CC=CC=C1 KMNCBSZOIQAUFX-UHFFFAOYSA-N 0.000 description 1
- SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 description 1
- MYISVPVWAQRUTL-UHFFFAOYSA-N 2-methylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC=C3SC2=C1 MYISVPVWAQRUTL-UHFFFAOYSA-N 0.000 description 1
- VVBLNCFGVYUYGU-UHFFFAOYSA-N 4,4'-Bis(dimethylamino)benzophenone Chemical compound C1=CC(N(C)C)=CC=C1C(=O)C1=CC=C(N(C)C)C=C1 VVBLNCFGVYUYGU-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 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
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
本発明は、輻射線の作用により硬化可能な液状
成型樹脂を用いて、ビデオデイスク、オーデイオ
デイスク等の原盤もしくは、スタンパーから複製
されるデイスク状情報記録担体に関するものであ
る。
従来ビデオ又はオーデイオデイスクのレプリカ
をつくるにあたつては熱可塑性樹脂を用いた加熱
圧縮成型法が用いられてきた。すなわち、ポリ塩
化ビニール、アクリル等の熱可塑性樹脂を軟化点
以上に加熱して、比較的高温に加熱されたスタン
パー間に狭んで、100トン程度の高圧を加えてプ
レスするコンプレツシヨン成型法か、軟化した樹
脂を加熱されていないスタンパー間に注入するイ
ンジエクシヨン成型法、もしくは、その折衷的な
ものである。加熱時に於て、ポリ塩化ビニールコ
ンパウンドの場合は、分解が起こり、塩化水素を
発生し、スタンパーを腐食させ、寿命を短くして
しまう。又スタンパーに高温高圧が加わることに
より、スタンパー表面に付着した異物が焼け付い
たり、中心止め金具部分や、外周押え部分に亀裂
が生じたり、軟化した樹脂中の異物により、樹脂
の広がり時点で、スタンパー表面に放射状の傷が
はいつたりして致命的な損傷となる場合がしばし
ばある。ビデオデイスクの場合は、特に信号記録
密度が高い故、デイスク成型時に発生する前述の
様な損傷によつて起こる信号の欠陥や、転写性
（スタンパーとの忠実性）不良によつて起る信号
劣化等が、デイスクの歩留りや、商品価値を著し
く下げることになる。
本発明は、かかる従来の欠点を除いた高品質、
高歩留りで、すぐれた生産性のレプリカデイスク
を提供するものである。
従来より、紫外線硬化型樹脂を用いて、レプリ
カデイスクを作る方法にはいくつかのやり方が提
案されている。紫外線硬化型樹脂に要求される性
能としては、スタンパー（一般にはNiが用いら
れる）との離型性が良好で、裏打ち担持材との密
着性が良いことがあげられる。硬化特性、体積収
縮、ポツトライフ等も重要な特性である。
第１図に反射型ビデオデイスク構造の実施例、
第２図に静電容量方式ビデオデイスク、第３図に
機械的接触式のビデオデイスクの構造の実施例を
示す。いずれも、デイスク断面で、部分的拡大図
である。
１は裏打ち担持材、２は紫外線硬化型樹脂によ
る信号転写層、３ａは成型後、前記信号転写層の
上に付着された金属反射層であり、アルミニウム
を1000Å程度付着させる。そして４は保護層であ
る。３ｂは、信号転写層２の上に付着された金属
導電層であり、耐食性に優れた合金インコネルが
用いられ、300〜500Åの厚みに付着させる。更に
信号検出用電極が接触しないように、誘電体層５
を形成する。裏打ち担持材１としては、λ＝
300nm〜400nmの範囲の紫外線を通す平板材料で
あれば、ガラス、ポリメチルメタフリレート、ポ
リ塩化ビニール、ポリカーボネート、ポリスチレ
ン等、使用可能である。
反射型ビデオデイスクの場合には、光学的活性
が問題になり、特に、入射レーザー光に対する異
方性及び旋光性があると、使いものにならない。
従つて板材の製法を十分考慮しなければならな
い。
本発明では信号転写層に用いる紫外線硬化型樹
脂組成として、ベースレジンにアクリル酸とエポ
キシ樹脂の付加化合物、即ち、エポキシアクリレ
ートを用いる。通常、エポキシアクリレートは、
粘度が高く作業上単独では使用出来ない。又、
種々の特性を付与する為にも、比較的粘度の低い
アクリル酸の多官能エステルを反応性希釈剤とし
て用いる。すなわち、エポキシアクリレートは紫
外線硬化型樹脂組成の一部を成すプレポリマーの
一種で、エポキシ樹脂とアクリル酸を反応させて
得られ、プレポリマーの末端に形成されたアクリ
ル型不飽和結合により反応硬化する。粘度が極め
て大きいため、単官能又は多官能モノマーにより
希釈して用いられ、加えるモノマーにより特性を
種々に変えることができる。本実施例ではエポキ
シアクリレートとしてNKエステルEPM―800
（新中村化学工業株式会社）やビスコート540（大
阪有機化学工業株式会社）等を用いているか、こ
れに限定されるものではない。
多官能反応性希釈剤の選択にあたつては、粘
度、反応速度、重合時の体積収縮、安全性等を考
慮しなければならない。特に重要な事は、Niス
タンパーとの離型性、裏打ち担持材との密着性と
いう相反する特性が必要である。これは、選択的
融和性を持つ多官能反応性希釈剤を使用すること
により実現出来る。反応速度、体積収縮の面か
ら、単官能及び２官能の反応性希釈剤を用いるの
が好適である。反応速度は、デイスク製作工程に
制約を与える。又体積収縮は、出来上がつたデイ
スクに椀状のソリを発生させ、面振れ及びデイス
ク内外周での高さ変化を生じ、再生信号を劣化さ
せる原因になる。
単官能反応性希釈剤としては、２―ヒドロキシ
エチルメタクリレート、２官能のものとしては、
１，６―ヘキサンジオールジアクリレートがあげ
られる。又、紫外線照射により反応を効率良く開
始させる為の光開始剤、光開始剤の反応速度向上
の為光開始促進剤を加える。
光開始剤としては、芳香族ケトンより誘導され
たものが、吸収波長、吸収係数、反応速度、酸素
阻害より考えて使い易い。具体的には２―クロロ
チオキサントン、２―メチルチオキサントン、ベ
ンジルジメチルケタール、２―エチルアントラキ
ノン、ベンゾフエノン、ベンジル、ベンゾインエ
チルエーテル、ベンゾインイソブチルエーテル等
をあげることが出来る。
又、光開始促進剤としては、芳香族ケトンより
誘導された光開始剤に有効なものとして３級アミ
ンがある。Ｐ，P′―ジメチルアミノベンゾフエノ
ン、Ｐ，P′―テトラメチルジアミノベンゾフエノ
ン、NN―テトラエチル―４，４―ジアミノベン
ゾフエノン、エチル―Ｐ―ジメチルアミノベンゾ
エイト等をあげることが出来る。
ポリ塩化ビニールを裏打ち担持材として用いる
場合、裏打ち担持材には十分な強度で密着し、
Niスタンパーとは十分良い離型性を持つ組みあ
わせとして好適な実施例を次にあげる。ベースレ
ジンとしては、エポキシアクリレート（ビスコー
ト540大阪有機化学工業株式会社）、２官能反応性
希釈剤として１，６―ヘキサンジオールジアクリ
レート、単官能反応性希釈剤として２―ヒドロキ
シエチルメタクリレート、光開始剤として、２―
クロロチオキサントン
The present invention relates to a disc-shaped information recording carrier that is reproduced from a master disc, such as a video disc or an audio disc, or from a stamper, using a liquid molded resin that can be cured by the action of radiation. Conventionally, in making replicas of video or audio disks, a heat compression molding method using thermoplastic resin has been used. In other words, it is a compression molding method in which a thermoplastic resin such as polyvinyl chloride or acrylic is heated above its softening point, then pressed between stampers heated to a relatively high temperature and pressed under high pressure of about 100 tons. , an injection molding method in which softened resin is injected between unheated stampers, or a compromise thereof. When heated, polyvinyl chloride compounds decompose and generate hydrogen chloride, which corrodes the stamper and shortens its life. In addition, when high temperature and pressure are applied to the stamper, foreign matter attached to the stamper surface may be burned, cracks may occur in the center stopper part or the outer peripheral holding part, and foreign matter in the softened resin may cause the resin to spread. Radial scratches often appear on the surface of the stamper, resulting in fatal damage. In the case of video discs, the signal recording density is particularly high, so signal defects occur due to the damage mentioned above that occurs during disc molding, and signal deterioration occurs due to poor transferability (fidelity with the stamper). etc., will significantly reduce the yield of disks and the product value. The present invention provides high quality and
This provides a replica disk with high yield and excellent productivity. Conventionally, several methods have been proposed for making replica disks using ultraviolet curable resins. The performance required of an ultraviolet curable resin is good releasability from a stamper (Ni is generally used) and good adhesion to a backing support material. Curing properties, volume shrinkage, pot life, etc. are also important properties. Figure 1 shows an example of a reflective video disk structure.
FIG. 2 shows an embodiment of the structure of a capacitance type video disk, and FIG. 3 shows an example of the structure of a mechanical contact type video disk. Each is a partially enlarged view of a disk cross section. Reference numeral 1 denotes a backing support material, 2 a signal transfer layer made of an ultraviolet curable resin, and 3a a metal reflective layer deposited on the signal transfer layer after molding, to which aluminum is deposited to a thickness of about 1000 Å. and 4 is a protective layer. 3b is a metal conductive layer deposited on the signal transfer layer 2, which is made of an alloy Inconel with excellent corrosion resistance, and is deposited to a thickness of 300 to 500 Å. Furthermore, a dielectric layer 5 is provided so that the signal detection electrodes do not come into contact with each other.
form. As the backing support material 1, λ=
Any flat plate material that transmits ultraviolet light in the range of 300 nm to 400 nm can be used, such as glass, polymethyl methacrylate, polyvinyl chloride, polycarbonate, and polystyrene. In the case of reflective video discs, optical activity is a problem, especially anisotropy and optical rotation with respect to the incident laser light, rendering them useless.
Therefore, the manufacturing method of the board must be carefully considered. In the present invention, an addition compound of acrylic acid and an epoxy resin, that is, epoxy acrylate, is used as the ultraviolet curable resin composition for the signal transfer layer in the base resin. Typically, epoxy acrylate is
Due to its high viscosity, it cannot be used alone for work purposes. or,
In order to impart various properties, a polyfunctional ester of acrylic acid with relatively low viscosity is used as a reactive diluent. In other words, epoxy acrylate is a type of prepolymer that forms part of the UV-curable resin composition, and is obtained by reacting epoxy resin with acrylic acid, and is cured by reaction with the acrylic unsaturated bonds formed at the ends of the prepolymer. . Since it has an extremely high viscosity, it is used after being diluted with monofunctional or polyfunctional monomers, and its properties can be varied depending on the monomers added. In this example, NK ester EPM-800 was used as the epoxy acrylate.
(Shin Nakamura Chemical Industry Co., Ltd.), Viscoat 540 (Osaka Organic Chemical Industry Co., Ltd.), etc., but are not limited to these. When selecting a polyfunctional reactive diluent, consideration must be given to viscosity, reaction rate, volumetric shrinkage during polymerization, safety, etc. Particularly important are the contradictory properties of mold releasability with the Ni stamper and adhesion with the backing support material. This can be achieved by using polyfunctional reactive diluents with selective compatibility. From the viewpoint of reaction rate and volume contraction, it is preferable to use monofunctional and difunctional reactive diluents. Reaction speed imposes constraints on the disk fabrication process. In addition, the volumetric shrinkage causes a bowl-shaped warpage in the finished disk, causing surface runout and height changes at the inner and outer circumferences of the disk, which causes deterioration of the reproduced signal. As a monofunctional reactive diluent, 2-hydroxyethyl methacrylate, as a difunctional diluent,
1,6-hexanediol diacrylate is mentioned. Further, a photoinitiator is added to efficiently initiate the reaction by ultraviolet irradiation, and a photoinitiation accelerator is added to improve the reaction rate of the photoinitiator. As photoinitiators, those derived from aromatic ketones are easy to use considering their absorption wavelength, absorption coefficient, reaction rate, and oxygen inhibition. Specific examples include 2-chlorothioxanthone, 2-methylthioxanthone, benzyl dimethyl ketal, 2-ethylanthraquinone, benzophenone, benzyl, benzoin ethyl ether, benzoin isobutyl ether, and the like. Furthermore, as photoinitiation promoters, tertiary amines are effective for photoinitiators derived from aromatic ketones. Examples include P,P'-dimethylaminobenzophenone, P,P'-tetramethyldiaminobenzophenone, NN-tetraethyl-4,4-diaminobenzophenone, and ethyl-P-dimethylaminobenzoate. . When using polyvinyl chloride as a backing support material, it adheres to the backing support material with sufficient strength,
The following is a preferred example of a combination with a Ni stamper that has sufficiently good mold releasability. Epoxy acrylate (Viscoat 540 Osaka Organic Chemical Industry Co., Ltd.) is used as the base resin, 1,6-hexanediol diacrylate as a bifunctional reactive diluent, 2-hydroxyethyl methacrylate as a monofunctional reactive diluent, and a photoinitiator. As, 2-
Chlorothioxanthone
【式】又は、ベンジルジメ チルケタール[Formula] or benzyl dime Cirketal
【式】
光開始促進助剤としては、エチル―Ｐ―ジメチル
アミノベンゾエイト
[Formula] Ethyl-P-dimethylaminobenzoate is used as a photoinitiation promoting aid.
【式】を含有した組 わせで、特に良好な結果が得られた。A set containing [formula] Particularly good results were obtained with this combination.
【表】
実施例とその結果を表１に示す。
ここで、表１における基板との密着性とは、碁
盤目テストのことを言い、これはナイフ等で塗膜
面に１（mm）程度の一定間隔の碁盤目状のスジ目
を入れ、粘着テープを押しつけて引き剥し、これ
により基板の方に塗膜が残るかどうかを調べるテ
ストである。スジ目を縦10、横10に切つておけば
全体で100個のマス目ができ、そのうち何個の塗
膜が残るかで塗膜の基板に対する密着強度を表わ
している。例えば100／100となれば密着性は十分
であり、０／100となれば全く密着性がないとい
うことを示している。
次に、金型との離型性とは、ニツケルスタンパ
ー（金型）と紫外線硬化型樹脂の剥れ易さのこと
を意味し、本発明のように紫外線硬化型樹脂を用
いて複製デイスクを作成する場合、微小ピツト構
造又は溝を有する平坦なニツケルスタンパー（金
型）から紫外線硬化型樹脂が容易に剥れなけれ
ば、うまくデイスクを作製することができない。
次に、表面タツクとは、粘着性のことを意味
し、本発明のようにニツケルスタンパーと裏打ち
用樹脂基板の端からしみ出した紫外線硬化型樹脂
は、空気中に触れると酸素による硬化阻害が起こ
り易すくなり、表面が未硬化のままとなるため、
指で触れると粘着感が生じる。これを表面タツク
（粘着性）といい、表面タツクがあるとハンドリ
ング時に汚れたり、真空中で成膜する際にガスを
出したりするため、複製デイスクの品質を低下さ
せてしまう。
表１からも明らかなように、実施例１の場合、
基板との密着性、スタンパーとの離型性、硬化性
共に良好な結果が得られている。実施例２では光
開始助剤をぬいたため、硬化特性が悪化してい
る。比較例１では１，６―ヘキサンジオールジア
クリレートを減らした為、基板との密着性が悪化
している。比較例２，３では単官能及び２官能反
応性希釈剤に実施例のような２―ヒドロキシエチ
ルメタクリレート及び１，６―ヘキサンジオール
ジアクリレートを用いなかつたため、基板に対す
る密着性が悪化している。比較例４の場合、２―
ヒドロキシエチルメタクリレートを減らしても実
施例と同様の効果が得られているが、実施例１に
比べ硬化収縮が大きくなつている。実施例１の体
積収縮率は約４％であるが、比較例４では７〜８
％と増大している。すなわち、比較例４のように
単官能モノマーである２―ヒドロキシエチルメタ
クリレートを減らすと、分子が一列につながる直
鎖構造部分が少なくなり、その結果、硬化収縮が
大きくなるため、デイスクを製造した際にお椀状
のそりが発生し、デイスクの品性を損うことにな
つている。
また、１，６―ヘキサンジオールジアクリレー
トにより、樹脂粘度をコントロールすると共に、
良好な硬化特性を付与でき、適度な収縮率より金
型との離型性をも改善できる。一方、２―ヒドロ
キシエチルメタクリレートにより、粘着性と、収
縮率を押える特性を付与し、金型との離型性をほ
とんど悪化させることなく樹脂基板との密着性を
改善できた。１，６―ヘキサンジオールジアクリ
レートは塩化ビニール樹脂の表面を若干犯すこと
により他の２官能性モノマーに比べ、極めて良好
な密着性が得られている。
Niスタンパーよりレプリカデイスクを作る方
法は、まずNiスタンパー上に紫外線硬化型樹脂
を滴下し、その上から裏打ち担持材料を圧着し、
押圧塗布する。紫外線硬化型樹脂による情報転写
層の厚みが、本体100μｍ前後又は、それ以下に
なるように設定する。しかる後に、裏打ち担持材
料を通して紫外線を照射し硬化させる。この場
合、裏打ち担持材から外周にはみ出す樹脂がある
場合は、酸素阻害を受けずに硬化することが望ま
しい。樹脂が硬化後、裏打ち担持材と一体化して
Niスタンパーより剥離して、レプリカデイスク
が出来る。後の工程で、必要な表面処理を施す。
前記の樹脂組成では、ポリ塩化ビニールの裏打ち
担持材と、硬化後の樹脂とは、凝集破壊もしくは
材料破壊を起こす程度までの良好な密着性が得ら
れた。又、Niスタンパーとは、極めて容易に剥
離出来、体積収縮に関しても許容限界内に納まつ
た。耐摩耗性に関しては、機械的接触式ビデオデ
イスクで再生実験を行なつた場合、ダイヤモンド
針に対して極めて良好な耐摩耗性を示し、従来
の、ポリ塩化ビニールコンパウンドを用いた従来
のプレスデイスクに比べ相当な長寿命が実現出来
た。反射型デイスクに使用した場合も、良好な転
写性、少ないドロツプアウト、良好な画質が実現
出来た。又、スタンパーの寿命に関しては、人為
的な事故がない限り何枚でも転写出来、Ｓ／Ｎの
低下もおこらないことが確認出来た。樹脂自体に
クリーニング効果がありスタンパー上にのつた塵
埃等は、転写樹脂層により取り去られてしまう。
従つて、特にスタンパー表面を傷付けない限り、
ドロツプアウト等が増加するということはあまり
ない。又、押圧塗布時、スタンパーに加わる圧力
は0.1Kg／cm2程度であるので、異物による傷もつ
きにくく、スタンパーの長寿命化が実現出来る。[Table] Table 1 shows Examples and their results. Here, the adhesion to the substrate in Table 1 refers to the checkerboard test, which involves making checkerboard-like stripes at regular intervals of about 1 (mm) on the coating surface using a knife, etc. This test involves pressing the tape and pulling it off to see if a coating remains on the substrate. If the stripes are cut 10 times vertically and 10 times horizontally, a total of 100 squares will be created, and the adhesion strength of the paint film to the substrate is determined by how many of these squares remain. For example, 100/100 indicates sufficient adhesion, and 0/100 indicates no adhesion at all. Next, the releasability from the mold refers to the ease with which the nickel stamper (mold) and the ultraviolet curable resin come off. If the ultraviolet curable resin cannot be easily peeled off from a flat nickel stamper (mold) having micro pit structures or grooves, the disk cannot be successfully manufactured. Next, surface tack means tackiness, and as in the present invention, the ultraviolet curable resin that seeps out from the edges of the nickel stamper and the backing resin substrate is inhibited by oxygen when it comes into contact with the air. This is more likely to occur and the surface remains uncured.
It feels sticky when you touch it with your fingers. This is called surface tack (adhesiveness), and if there is surface tack, it will become dirty during handling, or gas will be emitted during film formation in a vacuum, reducing the quality of the duplicate disk. As is clear from Table 1, in the case of Example 1,
Good results were obtained in terms of adhesion to the substrate, releasability from the stamper, and curing properties. In Example 2, the curing properties were deteriorated because the photoinitiation aid was omitted. In Comparative Example 1, the amount of 1,6-hexanediol diacrylate was reduced, resulting in poor adhesion to the substrate. In Comparative Examples 2 and 3, 2-hydroxyethyl methacrylate and 1,6-hexanediol diacrylate as in the Examples were not used as the monofunctional and bifunctional reactive diluents, and thus the adhesion to the substrate was deteriorated. In the case of Comparative Example 4, 2-
Even if the amount of hydroxyethyl methacrylate was reduced, the same effect as in the example was obtained, but the curing shrinkage was greater than in example 1. The volumetric shrinkage rate in Example 1 is about 4%, but in Comparative Example 4 it is 7-8%.
%. In other words, when the monofunctional monomer 2-hydroxyethyl methacrylate is reduced as in Comparative Example 4, the number of linear structures in which molecules are connected in a single line decreases, resulting in increased curing shrinkage. This causes bowl-shaped warping, which impairs the quality of the disk. In addition, 1,6-hexanediol diacrylate controls the resin viscosity and
Good curing properties can be imparted, and the releasability from the mold can also be improved through a moderate shrinkage rate. On the other hand, 2-hydroxyethyl methacrylate imparted properties of adhesion and suppressed shrinkage rate, and improved adhesion to the resin substrate without substantially deteriorating the releasability from the mold. 1,6-hexanediol diacrylate slightly damages the surface of the vinyl chloride resin, resulting in extremely good adhesion compared to other difunctional monomers. The method of making a replica disk using a Ni stamper is to first drop an ultraviolet curable resin onto the Ni stamper, then press the backing support material onto it.
Apply pressure. The thickness of the information transfer layer made of ultraviolet curable resin is set to be around 100 μm or less on the main body. Thereafter, ultraviolet light is irradiated through the backing support material for curing. In this case, if there is resin protruding from the backing support material to the outer periphery, it is desirable that the resin be cured without being inhibited by oxygen. After the resin hardens, it is integrated with the backing support material.
It peels off from the Ni stamper, creating a replica disk. Necessary surface treatment is applied in a later process.
With the above resin composition, good adhesion between the polyvinyl chloride backing support material and the cured resin was obtained to the extent that cohesive failure or material failure occurred. Furthermore, the Ni stamper could be peeled off very easily, and the volumetric shrinkage was within the allowable limits. Regarding abrasion resistance, playback experiments with mechanical contact video disks showed extremely good abrasion resistance against diamond needles, and compared to conventional press disks made of PVC compound. A considerably longer lifespan has been achieved. Even when used on reflective disks, good transferability, low dropout, and good image quality were achieved. Furthermore, regarding the lifespan of the stamper, it was confirmed that as long as there were no human-caused accidents, it could be transferred to as many sheets as possible, and the S/N ratio would not decrease. The resin itself has a cleaning effect, and dust and the like on the stamper are removed by the transfer resin layer.
Therefore, unless you particularly damage the stamper surface,
It is unlikely that dropouts will increase. Furthermore, since the pressure applied to the stamper during pressure application is approximately 0.1 kg/cm 2 , it is less likely to be scratched by foreign objects, and the life of the stamper can be extended.
図面は本発明の実施例を示すもので、第１図は
反射型デイスクの断面図、第２図は静電容量方式
デイスクの断面図、第３図は機械的接触式デイス
クの断面図である。
１……裏打担持材、２……信号転写層、３ａ…
…反射層、３ｂ……金属導電層、４……保護層、
５……誘電体層。
The drawings show embodiments of the present invention; FIG. 1 is a sectional view of a reflective disk, FIG. 2 is a sectional view of a capacitive disk, and FIG. 3 is a sectional view of a mechanical contact disk. . 1...Backing support material, 2...Signal transfer layer, 3a...
... Reflective layer, 3b... Metal conductive layer, 4... Protective layer,
5...Dielectric layer.
Claims (1)
裏打ち担持材間に充填された紫外線の作用により
硬化可能な液状成形樹脂層を紫外線の作用により
硬化せしめて情報転写層とし、前記樹脂層を前記
裏打ち担持材と一体化して、前記金型より剥離し
て得られるデイスク状情報記録担体において、前
記情報転写層用の樹脂として、アクリル酸とエポ
キシ樹脂の付加化合物を30〜70重量％、アクリル
酸の単官能性エステルとして、２―ヒドロキシエ
チルメタクリレートを10〜30重量％及び２官能性
エステルとして１，６―ヘキサンジオールジアク
リレートを10〜50重量％含有することを特徴とす
るデイスク状情報記録担体。 ２ 情報転写層用の樹脂に、光開始剤として、２
―クロロチオキサントンもしくはベンジルジメチ
ルケタールの少なくとも一方を含有し、更に光開
始助剤として、エチル―Ｐ―ジメチルアミノベン
ゾエイトを含有することを特徴とする特許請求の
範囲第１項に記載のデイスク状情報記録担体。[Scope of Claims] 1. A liquid molded resin layer that can be cured by the action of ultraviolet rays and is filled between a disc-shaped information recording mold having an information structure and a backing support material, is cured by the action of ultraviolet rays to form an information transfer layer, In the disk-shaped information recording carrier obtained by integrating the resin layer with the backing support material and peeling it from the mold, an addition compound of acrylic acid and epoxy resin is added at 30 to 70% as the resin for the information transfer layer. It is characterized by containing 10 to 30% by weight of 2-hydroxyethyl methacrylate as a monofunctional ester of acrylic acid and 10 to 50% by weight of 1,6-hexanediol diacrylate as a difunctional ester. Disc-shaped information recording carrier. 2. Add 2 as a photoinitiator to the resin for the information transfer layer.
- Disk-shaped information according to claim 1, characterized in that it contains at least one of chlorothioxanthone or benzyl dimethyl ketal, and further contains ethyl-P-dimethylaminobenzoate as a photoinitiation aid. record carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55163894A JPS5788503A (en) | 1980-11-20 | 1980-11-20 | Disc-shaped information recording carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55163894A JPS5788503A (en) | 1980-11-20 | 1980-11-20 | Disc-shaped information recording carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5788503A JPS5788503A (en) | 1982-06-02 |
| JPH024042B2 true JPH024042B2 (en) | 1990-01-25 |
Family
ID=15782822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55163894A Granted JPS5788503A (en) | 1980-11-20 | 1980-11-20 | Disc-shaped information recording carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5788503A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116815A (en) * | 1984-07-04 | 1986-01-24 | Sumitomo Bakelite Co Ltd | Manufacture of optical disk substrate |
| US4673602A (en) * | 1984-06-13 | 1987-06-16 | Sumitomo Bakelite Company Limited | Composite substrate plate for magnetic or optical disk and process for production thereof |
| JPS6192451A (en) * | 1984-10-11 | 1986-05-10 | Sumitomo Bakelite Co Ltd | Substrate for optical recording medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5386756A (en) * | 1976-10-15 | 1978-07-31 | Philips Nv | Plastic information carrier duplicating process and plastic record carrier and molding resin |
| JPS54130902A (en) * | 1978-03-22 | 1979-10-11 | Philips Nv | Multilayer information disk |
-
1980
- 1980-11-20 JP JP55163894A patent/JPS5788503A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5386756A (en) * | 1976-10-15 | 1978-07-31 | Philips Nv | Plastic information carrier duplicating process and plastic record carrier and molding resin |
| JPS54130902A (en) * | 1978-03-22 | 1979-10-11 | Philips Nv | Multilayer information disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5788503A (en) | 1982-06-02 |
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