JPS63100402A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS63100402A JPS63100402A JP61245254A JP24525486A JPS63100402A JP S63100402 A JPS63100402 A JP S63100402A JP 61245254 A JP61245254 A JP 61245254A JP 24525486 A JP24525486 A JP 24525486A JP S63100402 A JPS63100402 A JP S63100402A
- Authority
- JP
- Japan
- Prior art keywords
- number average
- optical
- disk
- average mol
- optical disk
- 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 36
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 229920002492 poly(sulfone) Polymers 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 6
- 125000006267 biphenyl group Chemical group 0.000 claims abstract description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 150000002431 hydrogen Chemical class 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000000306 recurrent effect Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- -1 fatty acid esters Chemical class 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920005668 polycarbonate resin Polymers 0.000 description 3
- 239000004431 polycarbonate resin Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000000113 methacrylic resin Substances 0.000 description 2
- YMHOBZXQZVXHBM-UHFFFAOYSA-N 2,5-dimethoxy-4-bromophenethylamine Chemical compound COC1=CC(CCN)=C(OC)C=C1Br YMHOBZXQZVXHBM-UHFFFAOYSA-N 0.000 description 1
- 239000004923 Acrylic lacquer Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 241000545067 Venus Species 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (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〕
本発明は光ディスクに係り、特にレタデーシ冒ンが小さ
くて光学的均質性にすぐれ、情報読み取り感度の高い光
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, and particularly to an optical disc that has small retardation, excellent optical homogeneity, and high information reading sensitivity.
ディスク上にレーザー光線のスポットビームを照射して
、ディスク上に微細なビットを形成することにより情報
を記録し、このビットからの反射またはこのビットの透
過光量を検出して情報を読みだす光学式情報記録、再生
方式は、情報記録密度を著しく上げることができる。Optical information that records information by irradiating a spot beam of laser light onto the disk to form minute bits on the disk, and then reads the information by detecting the amount of light reflected from or transmitted through these bits. The recording and reproducing method can significantly increase the information recording density.
また上記光学式、情報記録、再生方式は、再生される画
像や音質がすぐれた特性を有することから、画像や音声
の記録、再生等に広く実用されることが期待されている
。Furthermore, since the above-mentioned optical type, information recording, and reproducing method has excellent characteristics of reproduced images and sound quality, it is expected that it will be widely put to practical use in recording and reproducing images and sounds.
上記の記録再生方式に用いるディスクは、ディスク基材
をレーザー光が透過するため、ディスク基材は透明であ
ることは勿論、光学的に均質であることが要求される。In the disc used in the above recording and reproducing method, since laser light passes through the disc base material, the disc base material is required not only to be transparent but also to be optically homogeneous.
従来光ディスクには、メタクリル樹脂等が適用されてい
る。しかしメタクリル樹脂は、耐熱性、耐湿性、耐衝撃
性がまだ充分とは云い難いという問題がある。Conventionally, methacrylic resin or the like has been applied to optical discs. However, methacrylic resin has a problem in that its heat resistance, moisture resistance, and impact resistance are still far from satisfactory.
また、ビスフェノールA(:2.2−ビス(4−ヒドロ
キシフェニル)プロパン)をホスゲンや炭酸ジフェニル
等と反応させて得られるポリカーボネート樹脂は、耐熱
性、耐湿性、耐衝撃性等はすぐれているが、レタデーシ
冒ン(複屈折値)が大きくて光学的性質が劣り、ディス
クに記録された情報の読み取り感度が低下したり、エラ
ーが発生するという問題がある(日経エレクトロニクス
、第292号、1982年6月7日号)。In addition, polycarbonate resin obtained by reacting bisphenol A (:2,2-bis(4-hydroxyphenyl)propane) with phosgene, diphenyl carbonate, etc. has excellent heat resistance, moisture resistance, impact resistance, etc. , the retardation (birefringence value) is large and the optical properties are poor, resulting in problems such as reduced sensitivity for reading information recorded on the disc and errors. (Nikkei Electronics, No. 292, 1982) June 7 issue).
本発明の目的はレタデーシ璽ンが小さくて光学的均質性
にすぐれ、ディスクに記録された情報の読み取り感度の
高い光ディスクを提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disc with a small retardation, excellent optical homogeneity, and high sensitivity for reading information recorded on the disc.
上記目的は、下記繰り返し単位(1)からなる数平均分
子量λ000〜2(1000のポリサルホン樹脂を基材
とする光ディスクによって達成される。The above object is achieved by an optical disc based on a polysulfone resin having a number average molecular weight of λ000 to 2 (1000), which is composed of the following repeating unit (1).
但し上記繰り返し単位+11中、R1は水素またはフェ
ニル基、R2は水素、メチル基、フェニル基またはビフ
ェニル基である。However, in the above repeating unit +11, R1 is hydrogen or a phenyl group, and R2 is hydrogen, a methyl group, a phenyl group, or a biphenyl group.
本発明に用いるポリサルホン樹脂は、数平均分子量が2
.000〜200.OOQのものが好ましい。The polysulfone resin used in the present invention has a number average molecular weight of 2.
.. 000~200. Those of OOQ are preferred.
数平均分子量が2.000より小さくなると、光ディス
クが熱によってソリ、ネジレ等の変化を受は易くなり、
数平均分子量が200[]00より高いと成型しにくく
なる。When the number average molecular weight is less than 2.000, the optical disc becomes susceptible to changes such as warping and twisting due to heat.
When the number average molecular weight is higher than 200[]00, it becomes difficult to mold.
さらに本発明のディスク基材には成型時にスタンパとの
離凰性を改良するためにシリコーン、ワックス、脂肪酸
、脂肪酸エステル、脂肪酸金属塩、脂肪族アルコール等
の助剤や、光ディスクの帯電防止のために高級アルコー
ルのスルホン酸塩、第4級アンモニウム塩等の助剤を、
本発明の目的達成を阻害しない範囲で加えてもよい。Furthermore, the disc base material of the present invention contains auxiliary agents such as silicone, wax, fatty acids, fatty acid esters, fatty acid metal salts, and aliphatic alcohols to improve release properties from the stamper during molding, and to prevent static electricity on the optical disc. Add auxiliary agents such as higher alcohol sulfonates and quaternary ammonium salts to
They may be added to the extent that they do not impede achievement of the objectives of the present invention.
なお、上記の助剤は、単独で用いてもよく、二種以上混
合して用いてもよい。The above-mentioned auxiliary agents may be used alone or in combination of two or more.
本発明の光ディスクは、複製ディスクの場合には、上記
繰り返し単位(1)からなる数平均分子量2.000〜
2001)00のポリサルホン樹脂を射出成型またはプ
レス成型等の方法によってスタンパをセットした金星で
情報記録信号(トラッキング信号)となるビットを転写
しディスク基材を成型し、さらに−膜力に信号ビット転
写面に金属を真空蒸着、スパッタリングまたはイオンブ
レーティング等の方法によって反射層を形成し、さらに
必要に応じて反射層上に保護層を形成して製造すること
ができる。In the case of a duplicate disc, the optical disc of the present invention has a number average molecular weight of 2.000 to 2.000, which is composed of the repeating unit (1).
2001) 00 polysulfone resin is injection molded or press molded, a stamper is set on Venus, and the bits that become the information recording signal (tracking signal) are transferred to form the disk base material, and then the signal bits are transferred to the film force. It can be manufactured by forming a reflective layer on the surface of a metal by a method such as vacuum evaporation, sputtering, or ion blating, and further forming a protective layer on the reflective layer if necessary.
またメモリディスクの場合は、上記と同様にして情報記
録信号となるビットを転写し、このビット面上に非晶質
レアーメタルやレーザによって熱的に分解し得る化合物
等のユーザーで書き込みが可能な記録層をスパッタリン
グ、真空蒸着または塗布等によって形成し、この記録層
上に必要に応じて上記のような反射層や保護層を形成し
て製造することができる。In the case of a memory disk, the bits that become the information recording signal are transferred in the same way as above, and a user-writable record made of amorphous rare metal or a compound that can be thermally decomposed by a laser is recorded on the bit surface. It can be manufactured by forming a layer by sputtering, vacuum deposition, coating, etc., and forming a reflective layer or a protective layer as described above on this recording layer, if necessary.
次に本発明を実施例によってさらに詳しく説明する。 Next, the present invention will be explained in more detail with reference to Examples.
ポリサルホン樹脂は、以下の弐〇)〜(4)で表わされ
る繰り返し単位からなる数平均分子量2 (ILOOO
〜180.000の範囲にあるものを用いた。Polysulfone resin has a number average molecular weight 2 (ILOOO
~180.000 was used.
数平均分子量: 2へ000
数平均分子量: 5へ000
数平均分子量 : 4へ000及び180,000また
比較試料として、以下の式(A)で表わされる繰り返し
単位からなる数平均分子量3QOOOの市販ポリカーボ
ネート樹脂及び以下の式(B)で表わされる繰り返し単
位からなる数平均分子量30.000の市販ポリサルホ
ン樹脂を用いた。Number average molecular weight: 2 to 000 Number average molecular weight: 5 to 000 Number average molecular weight: 4 to 000 and 180,000 As comparative samples, commercially available polycarbonates with a number average molecular weight of 3QOOO consisting of repeating units represented by the following formula (A) were used. A commercially available polysulfone resin having a number average molecular weight of 30.000 and consisting of a resin and a repeating unit represented by the following formula (B) was used.
光ディスクは、以下のようにして製造した。すなわち上
記6種類の樹脂ペレットを用い、それぞれスタンバを装
着した金型中に射出成散し、信号ビットの刻まれた厚さ
1.21111%直径120箇のディスクを得た。この
信号ビットの刻まれた面上にスパッタリングによってア
ルミニウムの反射層を形成し、この反射層上にアクリル
ラッカーを塗布し、乾燥して保護層を形成して製造した
。The optical disc was manufactured as follows. That is, the six types of resin pellets mentioned above were injected and dispersed into a mold equipped with a stand bar to obtain 120 disks with a thickness of 1.21111% and a diameter having signal bits engraved thereon. A reflective layer of aluminum was formed by sputtering on the surface on which the signal bits were engraved, and an acrylic lacquer was applied on the reflective layer and dried to form a protective layer.
光ディスクの特性は、以下(+) 、 (II)に示す
方法で測定した。The characteristics of the optical disc were measured by the methods shown in (+) and (II) below.
(1) 耐熱性
光ディスクを120℃に4時間放置して、ディスクのソ
リ、ネジレの有無を調べた。(1) Heat-resistant optical discs were left at 120° C. for 4 hours, and the presence or absence of warpage or twisting of the discs was examined.
(11) 光学的均質性
光ディスクのレタデーシ1ンをエリプソメータ(溝尻光
学工業所社製)を用いてディスクの内側から外側まで1
0ケ所にわたって測定し、最も大きい値を最大レタデー
シ嘗ンとした。測足値の小さいものほど光学的均質性が
すぐれている。なお、レタデーシ曹ン測定に際しては、
光源に波長632゜8nmのHe −N eレーザー光
を用いた。(11) Optical homogeneity The retardation of an optical disc was measured from the inside to the outside using an ellipsometer (manufactured by Mizojiri Optical Industry Co., Ltd.).
Measurements were taken at 0 locations, and the largest value was taken as the maximum retardation. The smaller the measured value, the better the optical homogeneity. In addition, when measuring retardation carbon,
A He--Ne laser beam with a wavelength of 632° and 8 nm was used as a light source.
次に光ディスクを上記の方法で測定した結果を表に示し
た。表から本発明に係る4種類のポリサルホン樹脂で製
作した光ディスクは、市販のポリカーボネート樹脂、市
販のポリサルホン樹脂で製造した光ディスクと同様の耐
熱性を有することがわかった。Next, the results of measuring the optical disc using the above method are shown in the table. From the table, it was found that the optical discs manufactured using the four types of polysulfone resins according to the present invention had the same heat resistance as optical discs manufactured using commercially available polycarbonate resins and commercially available polysulfone resins.
そのうえ本発明に係るポリサルホン樹脂で製作した光デ
ィスクは、市販のポリカーボネート樹脂、市販のポリサ
ルホン樹脂で製造した光ディスクより最大レタデーシ胃
ンが極めて小さく、光学的均質性が著しくすぐれている
ことがわかった。Furthermore, it has been found that the optical disc manufactured using the polysulfone resin according to the present invention has an extremely smaller maximum retardation density and significantly superior optical homogeneity than optical discs manufactured using commercially available polycarbonate resins or commercially available polysulfone resins.
また表中の本発明に係る4種類のポリサルホン樹脂で製
作した光ディスクは、上記以外の特性も十分満足する実
用価値の高いものであった。Furthermore, the optical disks manufactured using the four types of polysulfone resins according to the present invention shown in the table had high practical value and sufficiently satisfied characteristics other than those mentioned above.
表 (*) 耐熱性に関する。120℃で4時間放置。table (*) Regarding heat resistance. Leave at 120°C for 4 hours.
以上述べたように本発明によれば、レタデーシ曹ンが小
さくて光学的均質性にすぐれ、ディスクに記録された情
報の読み取り感度の高い光ディスクが得られる。As described above, according to the present invention, an optical disc having a small retardation area, excellent optical homogeneity, and high sensitivity for reading information recorded on the disc can be obtained.
Claims (1)
000〜200,000のポリサルホン樹脂を基材とす
ることを特徴とする光ディスク。 ▲数式、化学式、表等があります▼・・・・・・(1) 但し、上記繰り返し単位(1)中、R_1は水素または
フェニル基、R_2は水素、メチル基、フェニル基また
はビフェニル基である。[Claims] 1. Number average molecular weight consisting of the following repeating unit (1) 2.
An optical disc characterized in that the base material is a polysulfone resin having a molecular weight of 000 to 200,000. ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(1) However, in the above repeating unit (1), R_1 is hydrogen or a phenyl group, and R_2 is hydrogen, a methyl group, a phenyl group, or a biphenyl group. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61245254A JPS63100402A (en) | 1986-10-17 | 1986-10-17 | Optical disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61245254A JPS63100402A (en) | 1986-10-17 | 1986-10-17 | Optical disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63100402A true JPS63100402A (en) | 1988-05-02 |
Family
ID=17130943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61245254A Pending JPS63100402A (en) | 1986-10-17 | 1986-10-17 | Optical disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63100402A (en) |
-
1986
- 1986-10-17 JP JP61245254A patent/JPS63100402A/en active Pending
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