JPS60151852A - Manufacture of digital signal recording and reproducing disk - Google Patents
Manufacture of digital signal recording and reproducing diskInfo
- Publication number
- JPS60151852A JPS60151852A JP655384A JP655384A JPS60151852A JP S60151852 A JPS60151852 A JP S60151852A JP 655384 A JP655384 A JP 655384A JP 655384 A JP655384 A JP 655384A JP S60151852 A JPS60151852 A JP S60151852A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- digital signal
- disk
- signal recording
- superior
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 150000002739 metals Chemical class 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- -1 Art Chemical class 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 239000011347 resin Substances 0.000 abstract description 14
- 229920005989 resin Polymers 0.000 abstract description 14
- 239000010949 copper Substances 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000009713 electroplating Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
- B29C45/2632—Stampers; Mountings thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオディスク、ディジタルオーデオディスク
（例えばコンパクトディスク）、静止画。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to video discs, digital audio discs (such as compact discs), and still images.
文書ファイルなどのディジタル信号記録再生ディスクの
製造方法に関するものである。The present invention relates to a method of manufacturing a disc for recording and reproducing digital signals such as document files.
従来例の構成とその問題点
この種のディジタル信号記録再生ディスクは、その情報
密度が極めて大きいことや、Ｓ／Ｎ、ノイズなど少ない
ことで情報媒体として有望視され、ビデオディスクやデ
ィジタルオーディオディスクなどとして商品化されてい
る。Conventional structure and its problems This type of digital signal recording/reproducing disk is considered promising as an information medium due to its extremely high information density, low S/N ratio, and low noise, and is used as a video disk, digital audio disk, etc. It has been commercialized as.
第１図に一般的なディジタルオーディオディスクの概要
を示す。これはＰＣＭ変換されたディジタル信号が樹脂
基板に凹凸状のビット列として記録され、これが半導体
レーザによって再生されるものである。第１図において
１はディスク全体、２は樹脂基板、３は凹凸状ピット列
状に刻まれたディジタル信号、４はその表面に成形され
た反射膜、５は反射膜４の表面にコーティングされた保
護膜、６はディスク１の読取面から照射される半導体レ
ーザである。FIG. 1 shows an overview of a general digital audio disc. In this method, a PCM-converted digital signal is recorded on a resin substrate as a concavo-convex bit string, and this is reproduced by a semiconductor laser. In Fig. 1, 1 is the entire disk, 2 is a resin substrate, 3 is a digital signal engraved in the form of a row of uneven pits, 4 is a reflective film formed on its surface, and 5 is a coating on the surface of the reflective film 4. The protective film 6 is a semiconductor laser irradiated from the reading surface of the disk 1.
上記ディスクは、一般的に第２図に示す成形工程によシ
作成される。第２図ａに示すディジタル信号作成用スタ
ンパ−７に、成形法により第２図す、ｃに示すように信
号を転写し樹脂基板２が作成される。その後順次工程を
へて第１図Ｃに示す３．７
ディジタル信号記録再生ディスクが作成される。The disk is generally made by a molding process shown in FIG. A resin substrate 2 is created by transferring a signal as shown in FIG. 2C to the digital signal creation stamper 7 shown in FIG. 2A by a molding method. Thereafter, a 3.7 digital signal recording/reproducing disk shown in FIG. 1C is produced through sequential steps.
従来のスタンパ−は、一般的にはメッキにより作成され
たＮｉ板で、その厚さは０．２〜０．３’ｒｍｎと薄い
ものであり、そりやうねりや厚みむらなと多く存在する
。この様な状態でのスタンパ−を使用してディスクを作
成する場合を第３図に示す。第３図ａは従来のスタンパ
−７を示し、そりやうねりや厚みむらが多く存在する。A conventional stamper is generally a Ni plate made by plating, and its thickness is as thin as 0.2 to 0.3'rmn, and there are many warps, undulations, and uneven thicknesses. FIG. 3 shows a case where a disc is created using the stamper in such a state. FIG. 3a shows a conventional stamper 7, which has many warps, undulations, and thickness unevenness.
第３図すは成形工程断面図を示し、８は金型の可動部、
９はスタンパ−７の内周部を保持する部分、１０はスタ
ンパ−７の外周部を保持する部分を示す。１１は金型の
固定部で、１２はディスクの外周部を形成する外周リン
グである。１３の射出口より樹脂が射出され、１４の空
間部で樹脂基板が成形される。Figure 3 shows a sectional view of the molding process, 8 is the movable part of the mold,
Reference numeral 9 indicates a portion that holds the inner circumferential portion of the stamper 7, and numeral 10 indicates a portion that holds the outer circumferential portion of the stamper 7. Reference numeral 11 denotes a fixing part of the mold, and reference numeral 12 denotes an outer peripheral ring forming the outer peripheral part of the disk. Resin is injected from an injection port 13, and a resin substrate is molded in a space 14.
この場合、第３図Ｃに示すように、成形後の樹脂基板１
６はその形状にそりやうねりや厚みむらなど存在し、寸
だスタンパ−裏面１６と金型可動部８との接触が不完全
で熱伝導が一定でないことより、スタンパ−７上の樹脂
の流れが不均一で不安定のだめ、複屈折率など光学特性
も悪化するという問題点を有していた。In this case, as shown in FIG. 3C, the resin substrate 1 after molding
6 has warpage, undulations, uneven thickness, etc. in its shape, and the contact between the back surface 16 of the stamper and the movable part 8 of the mold is incomplete and heat conduction is not constant, so the resin flow on the stamper 7. The problem was that the optical properties such as birefringence deteriorated due to non-uniformity and instability.
発明の目的
本発明は、これらの問題点を解消するもので、ディスク
形状が良好な、しかも複屈折率など光学特性の優れたデ
ィジタル信号記録再生ディスクを作成する方法を提供す
るものである。OBJECTS OF THE INVENTION The present invention solves these problems and provides a method for producing a digital signal recording/reproducing disk having a good disk shape and excellent optical properties such as birefringence.
発明の構成
本発明はスタンパ−の裏面に熱伝導の優れた、かつ上記
スタンパ−より軟らかな金属を設けだディジタル信号作
成用のスタンパ−を用いてディジタル信号記録再生ディ
スクを製造する方法である。DESCRIPTION OF THE INVENTION The present invention is a method for manufacturing a digital signal recording/reproducing disk using a stamper for producing digital signals, which has a metal on the back surface of the stamper that is superior in heat conductivity and is softer than the stamper.
実施例の説明
第４図は本発明のディジタル信号記録再生ディスクの製
造方法の一実施例を示す。ここでは、ディスクを射出成
形することにより作成する例のため断面図にて示す。DESCRIPTION OF THE EMBODIMENT FIG. 4 shows an embodiment of the method for manufacturing a digital signal recording/reproducing disk of the present invention. Here, a cross-sectional view is shown because the disk is created by injection molding.
第４図ａはスタンパ−７の裏面に、熱伝導の優れた、か
つスタンパ−７の材料であるＮｉ より軟らかな金属１
７を設けた場合を示す。ここでは、上記金属としてはＣ
ｕ（銅）を電気メッキにより厚５ベーノ
さ１０〜６０μｍ設けた。Figure 4a shows a metal 1 which is softer than Ni, which has excellent thermal conductivity and is the material of the stamper 7, on the back side of the stamper 7.
7 is provided. Here, the above metal is C
U (copper) was formed by electroplating to a thickness of 50 mm and a thickness of 10 to 60 μm.
第４図す、ｃはこのように作成したスタンパ−を使用し
た射出成形工程およびディスクを示す。Figures 4 and 4c show the injection molding process and disk using the stamper thus prepared.
この場合、スタンパ−７の裏面に設けた金属（Ｃｕ）１
７が、金型の可動部８と密着性がよく、かつ熱伝導が良
好なため、射出口１３より樹脂が流れた場合にスタンパ
−７上を均一に流動する。このだめディスク形状のバラ
ツキが少なり、シかも、熱伝導が良いことより、スタン
パ−７の温度分布が優れているので、樹脂の冷却も均一
になり、従って複屈折率が優れたディスク１８を作成す
ることができる。In this case, the metal (Cu) 1 provided on the back side of the stamper 7
Since resin 7 has good adhesion to the movable part 8 of the mold and good heat conduction, when the resin flows from the injection port 13, it flows uniformly over the stamper 7. Since the variation in the shape of the disc is small and the temperature distribution of the stamper 7 is excellent due to good heat conduction, the resin can be cooled uniformly, and therefore the disc 18 with an excellent birefringence can be produced. can be created.
スタンパ−裏面に設ける金属としては、Ｃｕの他に、Ａ
ｎ、Ａｕ、Ａｇや上記金属の化合物（例えば黄銅）や複
合体、複層構造などでもよい。また、上記金属の作成法
としては、電解メッキ、無電解メッキ、化学的または物
理的な蒸着方法などが利用できる。In addition to Cu, the metal provided on the back side of the stamper is A.
n, Au, Ag, or a compound (for example, brass) of the above metals, a composite, a multilayer structure, or the like. Further, as a method for producing the above-mentioned metal, electrolytic plating, electroless plating, chemical or physical vapor deposition method, etc. can be used.
発明の効果
以上のように本発明は、ディジタル信号作成用スタンパ
−として、裏面に熱伝導の優れたかつ上記スタンパ−よ
り軟らかな金属を設けたものを用い、このスタンパ−に
よってディジタル信号記録再生ディスクを成形するもの
であるから、得られたディジタル信号記録再生ディスク
は、そり、うねり、厚みむらなどの少ない、形状の安定
した、しかも、複屈折率など光学特性の優れたものとな
る。Effects of the Invention As described above, the present invention uses a stamper for creating a digital signal that has a metal on its back surface that is superior in heat conduction and is softer than the above-mentioned stamper, and uses this stamper to create a digital signal recording/reproducing disk. The resulting digital signal recording/reproducing disk has a stable shape with little warpage, waviness, uneven thickness, etc., and has excellent optical properties such as birefringence.
第１図ａ、 、 ｂ 、 ｃは一般的なディジタル信号
記録再生ディスクの平面図、断面図および要部断面図、
第２図ａ、ｂ、ｃは一般的なディジタル信号記録再生デ
ィスクの成形時の断面図、第３図ａ。
ｂ、ｃは従来のディジタル信号記録再生ディスクの射出
成形法を示す断面図、第４図ａ、ｂ、ｃは、本発明のデ
ィジタル信号記録再生ディスクの製造方法の一実施例を
示す断面図である。
１・・・ディスク、２・・−・・−樹脂基板、３・・・
・ディジタル信号、４・−・反射膜、５・−保護膜、γ
・・・・スタンパ−１８・・・・金型の可動部、９ ス
タ了ぺ一／
ンパー内周保持部、１０・−スタンパ−外周保持部、１
１・・・金型の固定部、１２・・・外周リング、１３・
・・・射出口、１４・・・・樹脂成形空間部、１７・・
スタンパ−裏面に設けた金属、１８・・ディジタル信号
記録再生ディスク。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図Figures 1a, 1b, and 1c are a plan view, a sectional view, and a sectional view of a main part of a general digital signal recording/reproducing disk,
FIGS. 2a, b, and c are cross-sectional views of a general digital signal recording/reproducing disk during molding, and FIG. 3a is a cross-sectional view of the same. Figures b and c are cross-sectional views showing a conventional injection molding method for a digital signal recording/reproducing disk, and Figures 4a, b, and c are cross-sectional views showing an embodiment of the method for manufacturing a digital signal recording/reproducing disk of the present invention. be. 1...disc, 2...-resin substrate, 3...
・Digital signal, 4.--Reflective film, 5.--Protective film, γ
... Stamper 18... Movable part of the mold, 9 Stamper inner periphery holding part, 10 - Stamper outer periphery holding part, 1
1... Fixing part of the mold, 12... Outer ring, 13...
...Injection port, 14...Resin molding space, 17...
Metal provided on the back of the stamper, 18...Digital signal recording and reproducing disk. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3
Claims (2)
スタンパ−より軟らかな金属を設けたディジタル信号酸
作用スパンパーを用いてディジタル信号記録再生ディス
クを成形することを特徴とするディジタル信号記録再生
ディスクの製造方法。(1) Digital signal recording characterized in that a digital signal recording/reproducing disk is formed using a digital signal acid stamper in which a metal with excellent thermal conductivity and softer than the stamper is provided on the back side of the stamper. A method of manufacturing playable discs.
は黄銅など上記金属の化合物や複合体ｉ 閑＋ ｌ Ａ
ことを特徴とする特許請求の範囲第１項記載のディジタ
ル信号記録再生ディスクの製造方法。(2) Metals such as Art, Cu, Au, Ag, etc., or compounds or composites of the above metals such as brass.
A method of manufacturing a digital signal recording/reproducing disc according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP655384A JPS60151852A (en) | 1984-01-18 | 1984-01-18 | Manufacture of digital signal recording and reproducing disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP655384A JPS60151852A (en) | 1984-01-18 | 1984-01-18 | Manufacture of digital signal recording and reproducing disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60151852A true JPS60151852A (en) | 1985-08-09 |
Family
ID=11641520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP655384A Pending JPS60151852A (en) | 1984-01-18 | 1984-01-18 | Manufacture of digital signal recording and reproducing disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60151852A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2630570A1 (en) * | 1988-04-21 | 1989-10-27 | Mitev Stoyan | Die for manufacturing optical discs |
| EP0390564A2 (en) * | 1989-03-31 | 1990-10-03 | Hitachi Maxell Ltd. | A metal mold for resin substrate for an optical recording medium and recording medium obtained by it |
| US6514437B1 (en) * | 1997-04-16 | 2003-02-04 | Matsushita Electric Industrial Co., Ltd. | Stamper protecting layer for optical disk molding apparatus, optical disk molding apparatus and optical disk molding method using the stamper protecting layer |
-
1984
- 1984-01-18 JP JP655384A patent/JPS60151852A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2630570A1 (en) * | 1988-04-21 | 1989-10-27 | Mitev Stoyan | Die for manufacturing optical discs |
| EP0390564A2 (en) * | 1989-03-31 | 1990-10-03 | Hitachi Maxell Ltd. | A metal mold for resin substrate for an optical recording medium and recording medium obtained by it |
| US6514437B1 (en) * | 1997-04-16 | 2003-02-04 | Matsushita Electric Industrial Co., Ltd. | Stamper protecting layer for optical disk molding apparatus, optical disk molding apparatus and optical disk molding method using the stamper protecting layer |
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