JPH01247195A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH01247195A JPH01247195A JP63074386A JP7438688A JPH01247195A JP H01247195 A JPH01247195 A JP H01247195A JP 63074386 A JP63074386 A JP 63074386A JP 7438688 A JP7438688 A JP 7438688A JP H01247195 A JPH01247195 A JP H01247195A
- Authority
- JP
- Japan
- Prior art keywords
- softening point
- optical
- optical disk
- polycarbonate resin
- retardation
- 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 32
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 15
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 15
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims abstract 2
- WVIIMZNLDWSIRH-UHFFFAOYSA-N cyclohexylcyclohexane Chemical group C1CCCCC1C1CCCCC1 WVIIMZNLDWSIRH-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 3
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 230000003252 repetitive effect Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000113 methacrylic resin Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000004923 Acrylic lacquer Substances 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
- 239000004305 biphenyl Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 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
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 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
- 239000001294 propane Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/529—Macromolecular coatings characterised by the use of fluorine- or silicon-containing organic compounds
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- 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〕
本発明は光ディスクに係り、特に上記の式（ＩＪで表わ
される繰返し単位からなり、軟化点か１５０〜３００℃
の範囲にあるポリカーボネート樹脂を基材とする光ディ
スクに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disk, and in particular, it is composed of a repeating unit represented by the above formula (IJ) and has a softening point of 150 to 300°C.
The present invention relates to an optical disc using polycarbonate resin as a base material.
レーザ光線のスポットビームなディスク上にあて、ディ
スク上の微細なビットによって記録された信号を、反射
光量または透過光量を検出することによって読出す光学
式情報記録／再生方式は。This is an optical information recording/reproducing method in which a spot beam of a laser beam is directed onto a disk and the signals recorded by minute bits on the disk are read out by detecting the amount of reflected or transmitted light.
著しく記録密度を上げることかできる。また、光学式情
報記録／再生方式は、再生される画像や音質が優れた特
性を有することから１画像や音声の記録／再生、多量の
情報の記録／再生等に広く使用されることが期待されて
いる。It is possible to significantly increase the recording density. In addition, optical information recording/reproducing methods are expected to be widely used for recording/reproducing single images or audio, recording/reproducing large amounts of information, etc., as they have excellent characteristics of reproduced images and sound quality. has been done.
上記の光学式情報記録／再生方式に使用されるディスク
は、ディスク基材をレーザ光線が透過するために透明で
あることは勿論のこと、光学的均質性が強く求められて
いる。このデイヌクには。Disks used in the above-mentioned optical information recording/reproducing system are strongly required not only to be transparent, but also to have optical homogeneity because a laser beam passes through the disk base material. For this Deinuk.
例えば日経エレクトロニクスの第２９２号（１９８２年
６月７日号）に記載されているように、メタクリル樹脂
、ポリカーボネート樹脂等が用いられている。For example, as described in Nikkei Electronics No. 292 (June 7, 1982 issue), methacrylic resin, polycarbonate resin, etc. are used.
しかしながら、上記したメタク１）ル樹脂等をディスク
に使用する場合には、耐熱性、耐湿性ｊ６よび耐衝撃性
の点でまだ充分とは言い難い。However, when the above-mentioned methacrylic resin or the like is used for a disk, it is still far from sufficient in terms of heat resistance, moisture resistance, and impact resistance.
また、ビスフェノールＡ（２，２−ビス（４′−ヒドロ
争ジフエニル）プロパン）をホスゲンヤ炭酸ジフェニル
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ｆおいて優れているものの、レ
タデーシ冒ン（複屈折値）が大きく、光学的性質が劣９
．ディスクに記録さｎ九情報の読取感度が低下したり、
エラーが発生する問題がある（日経エレクトロニクス、
第２９２号、１９８２年６月７日）。In addition, polycarbonate resin obtained by reacting bisphenol A (2,2-bis(4'-hydro-diphenyl)propane) with phosgenya diphenyl carbonate, etc. has excellent heat resistance, moisture resistance, impact resistance, etc. However, the retardation (birefringence value) is large and the optical properties are poor.
．． The reading sensitivity of the n9 information recorded on the disc may decrease,
There is a problem where an error occurs (Nikkei Electronics,
No. 292, June 7, 1982).
本発明の目的は、上記した従来技術の問題点をなくシ、
透明性、耐熱性、耐湿性、耐衝撃性に優れ、レタデーシ
ョンが小さく光学的均質性に優れた光ディスクを提供す
るにある。An object of the present invention is to eliminate the problems of the prior art described above;
An object of the present invention is to provide an optical disc that has excellent transparency, heat resistance, moisture resistance, and impact resistance, and has small retardation and excellent optical homogeneity.
〔課題を解決するための手段〕
すなわち、本発明は下記の式（１）で表わされる繰返し
単位からなり、軟化点が１５０〜１０’Ｃの範囲にある
ポリカーボネート樹脂を基材とする光ディスクによって
達成される。[Means for Solving the Problems] That is, the present invention has been achieved by an optical disk made of a polycarbonate resin as a base material, which is composed of repeating units represented by the following formula (1) and has a softening point in the range of 150 to 10'C. be done.
但し、Ｒ，、Ｒ，は炭素数３個から１３個までのアルキ
ル基（ＣｎＨ２ｎ＋＋ ； ｎ＝３−１３ ）またはシ
クロ本発明に用いるポリカーボネー）［脂は、軟化点が
１５０℃未満であると、光ディスクが熱によってそり、
ねじれ等の変化を受は易く、一方、軟化点が３００℃を
越えると、成形か著しく困難となりいずれの場合も好ま
しくない。However, R,, R, is an alkyl group having from 3 to 13 carbon atoms (CnH2n++; n=3-13) or a cyclopolycarbonate used in the present invention) [the fat has a softening point of less than 150°C] , the optical disc warps due to heat,
It is easily susceptible to changes such as twisting, and on the other hand, if the softening point exceeds 300°C, it becomes extremely difficult to mold, which is not preferable in either case.
本発明の光ディスクは１本発明に係る上記のポリカーボ
ネート樹脂を、射出成形またはプレス成形等の方法によ
り、スタンパ−をセットした金型で、記録信号となるビ
ットを転写し、ディスク基材を成形する。さらに複製デ
ィスクの場合には、ディスクは、一般にビット転写面に
、金属の真空蒸着、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、必要に応じ
て反射層の保譲層を形成して製造することができる。The optical disc of the present invention is produced by: (1) using the above-mentioned polycarbonate resin according to the present invention, using a method such as injection molding or press molding, using a mold equipped with a stamper to transfer bits serving as a recording signal, and forming a disc base material. . Furthermore, in the case of a duplicate disc, a reflective layer is generally formed on the bit transfer surface by a method such as vacuum vapor deposition of metal, sputtering, or ion blasting, and if necessary, a preservation layer of the reflective layer is formed. It can be manufactured using
また、メモリーディスクの場合には、ディスクは、上記
と同様にしてトラッキング信号となるビットを転与して
から、このビット面に１例えば、非晶買レアーメタルや
レーザーによって熱的に分解し得る化合物等から成るユ
ーザー側で書込可能な記録層を、スパッタリング、蒸着
ｉたは塗布等によって形成し、必要に応じて上記のよう
な反射ｊ−や保ａ層を形成して製造することができる。In the case of a memory disk, a bit that becomes a tracking signal is transferred to the disk in the same manner as described above, and then a layer of material such as an amorphous rare metal or a compound that can be thermally decomposed by a laser is applied to the bit surface. It can be manufactured by forming a user-writable recording layer consisting of the following by sputtering, vapor deposition, coating, etc., and forming a reflective layer or a preservation layer as described above as necessary. .
次に本発明を実施例により、さらに詳細に駈明する。 Next, the present invention will be explained in more detail with reference to Examples.
供試樹脂
使用した樹脂は、下記式の繰返し単位からなり下記の軟
化点を有するポリカーボネート樹脂の３釉類である。Test Resin The resins used were three glazes of polycarbonate resins consisting of repeating units of the following formula and having the following softening points.
（但し、軟化点が２００℃のもの）
（但し、軟化点か２５０℃のもの）
（但し、軟化点かろｏｏ℃のもの）
また、比較例として、下記式（Ｖ）で表わさｒＬる繰返
し単位からなり、かつ軟化点が１９０℃の通常のポリカ
ーボネート樹脂を用いた。(However, the softening point is 200°C) (However, the softening point is 250°C) (However, the softening point is 250°C) (However, the softening point is 250°C) In addition, as a comparative example, the repeating unit rL represented by the following formula (V) A normal polycarbonate resin having a softening point of 190° C. was used.
上記の４種類のポリカーボネート樹脂ベレットをそれぞ
れスタンパ−を装着した金型中に射出成形し、厚さＬ
２０ 、直径１２０簡のディスクを得た。The above four types of polycarbonate resin pellets were each injection molded into a mold equipped with a stamper, and the thickness was L.
20, and a disk with a diameter of 120 pieces was obtained.
次に、ディスクの信号ビットの刻まれた面に、スパッタ
リング法により、アルミニウムよりなる反射層を形成し
、この反射層上にアクリルラッカーを塗布した後、乾燥
して保農層を形成し、光ディスクを得た。Next, a reflective layer made of aluminum is formed by sputtering on the surface of the disc on which the signal bits are engraved, and an acrylic lacquer is applied on this reflective layer, and then dried to form a protective layer. I got it.
元ディスクの特性測定評価方法
（１） 軟化点
上記の４ａ類のポリカーボネート樹脂によりそれぞれ平
板を作製し、 １１５人７２０６に準じてピカット軟化
点を求めた。Method for measuring and evaluating characteristics of original disks (1) Softening point Flat plates were prepared from each of the above-mentioned 4a class polycarbonate resins, and the Picat softening point was determined according to 115 people 7206.
（２） 耐熱性
上記のようにして作製した４棟類の光ディスクを１２０
℃で４時間放置した後、そり、ねじれの有無を判定した
。(2) Heat resistance Four types of optical discs produced as described above were heated to 120
After being left at ℃ for 4 hours, the presence or absence of warpage and twisting was determined.
（３）光学的均質性
上記のようにして作製した光ディスクについて、レタデ
ーションを、エリプンメータ（溝尻光学工業所社製）に
よって、波長６３２．８ ｎｒｓの１１ａ−Ｈａレジー
光を照射して光ディスクの内側から外側まで１０箇所測
定した。最大値を最大レタデーションと表示する。最大
レタデーション値の小さい方が、光学的均質性が良好で
ある。(3) Optical homogeneity The retardation of the optical disc produced as described above was measured from the inside of the optical disc by irradiating 11a-Ha laser light with a wavelength of 632.8 nrs using an Elipunmeter (manufactured by Mizojiri Optical Industry Co., Ltd.). Measurements were taken at 10 locations on the outside. Display the maximum value as maximum retardation. The smaller the maximum retardation value, the better the optical homogeneity.
評価結果
評価結果をまとめて下表に示す。表から明らかなように
１本発明に係るポリカーボネート樹脂を用いて製造した
光ディスクは、いずれも通常のポリカーボネート樹脂を
用いて製造した光ディスクより軟化点が高く、耐熱性が
優れている。また。Evaluation Results The evaluation results are summarized in the table below. As is clear from the table, all optical discs manufactured using the polycarbonate resin according to the present invention have a higher softening point and superior heat resistance than optical discs manufactured using ordinary polycarbonate resin. Also.
最大レタテーションが小さく、光学的均質性（透明性も
含めて）も著しく優れ、かつ情報の読取感度も高いこと
がわかる。It can be seen that the maximum retardation is small, the optical homogeneity (including transparency) is extremely excellent, and the information reading sensitivity is high.
さらに、耐湿性、耐衝撃性も良好であった。Furthermore, moisture resistance and impact resistance were also good.
以上述べたように本発明によれば、透明性、耐熱性、耐
湿性に優れ、レタデーシ３ンが小さく光学的均質性に優
れ、かつ情報の読取感度も高い光ディスクが得られる。As described above, according to the present invention, an optical disk can be obtained which has excellent transparency, heat resistance, and moisture resistance, has a small retardation, has excellent optical homogeneity, and has high information reading sensitivity.
じ 代理人 弁理士 小 川 勝 男character Agent: Patent Attorney Masao Kogawa
Claims (1)
化点が１５０〜３００℃の範囲にあるポリカーボネート
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、Ｒ＿１、Ｒ＿２は炭素数３個から１３個までのア
ルキル基（Ｃ＿ｎＨ＿２＿ｎ＿＋＿１；ｎ＝３〜１５）
またはシクロヘキシル基（▲数式、化学式、表等があり
ます▼）またはビシクロヘキシル基（▲数式、化学式、
表等があります▼）である。[Scope of Claims] 1. An optical disc characterized by having a polycarbonate resin as a base material, which is composed of repeating units represented by the following formula (1) and has a softening point in the range of 150 to 300°C. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) However, R_1 and R_2 are alkyl groups with 3 to 13 carbon atoms (C_nH_2_n_+_1; n=3 to 15)
Or cyclohexyl group (▲Mathematical formula, chemical formula, table, etc.▼) or bicyclohexyl group (▲Mathematical formula, chemical formula, table, etc.)
There are tables etc. ▼).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074386A JPH01247195A (en) | 1988-03-30 | 1988-03-30 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074386A JPH01247195A (en) | 1988-03-30 | 1988-03-30 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01247195A true JPH01247195A (en) | 1989-10-03 |
Family
ID=13545683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63074386A Pending JPH01247195A (en) | 1988-03-30 | 1988-03-30 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01247195A (en) |
-
1988
- 1988-03-30 JP JP63074386A patent/JPH01247195A/en active Pending
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