JPH0461417B2 - - Google Patents
Info
- Publication number
- JPH0461417B2 JPH0461417B2 JP7401984A JP7401984A JPH0461417B2 JP H0461417 B2 JPH0461417 B2 JP H0461417B2 JP 7401984 A JP7401984 A JP 7401984A JP 7401984 A JP7401984 A JP 7401984A JP H0461417 B2 JPH0461417 B2 JP H0461417B2
- Authority
- JP
- Japan
- Prior art keywords
- digital signal
- stamper
- disk
- signal
- digital
- 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
Links
- 238000012360 testing method Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 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
-
- 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
- G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
- G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオデイスク、デイジタルオーデイ
オデイスク（例えばコンパクトデイスク）、静止
画、文書フアイルなどのデイジタル信号再生用の
テストデイスクの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a test disk for reproducing digital signals such as video disks, digital audio disks (such as compact disks), still images, document files, and the like.
従来例の構成とその問題点
この種のデイジタル信号再生デイスクは、その
情報密度が極めて大きいことや、Ｓ／Ｎ、ダイナ
ミツクレンジが大きいことなど情報媒体として有
望視され、ビデオデイスクやデイジタルオーデイ
オデイ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 reproducing disk is considered promising as an information medium due to its extremely high information density, large S/N ratio, and large dynamic range, and is used as a video disk and digital audio disk. It has been commercialized as such.
第１図に一般的なデイジタルオーデイオデイス
クであるコンパクトデイスクの概要を示す。これ
はPCM変換されたデイジタル信号が樹脂基板に
凹凸状のピツト列状に記録され、これが半導体レ
ーザによつて再生されるものである。第１図にお
いて１はデイスク全体、２は樹脂基板、３は凹凸
状のピツト列状に刻まれたデイジタル信号、４は
その表面に形成された反射膜、５は反射膜４の表
面にコーテイングされた保護膜、６はデイスク読
取面より照射される半導体レーザである。 FIG. 1 shows an overview of a compact disk, which is a common digital audio disk. In this system, a PCM-converted digital signal is recorded on a resin substrate in the form of an uneven pit array, 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 disk reading surface.
ここで反射膜４はデイジタル信号３を半導体レ
ーザ６により再生する場合に照射光を反射させる
ために必要なものである。また、一般的にこの反
射膜は蒸着やスパツタリングなどの物理蒸着法に
より形成されるが、ピンホール等が生じ反射膜の
欠落する場合があり得る。 Here, the reflective film 4 is necessary to reflect the irradiated light when the digital signal 3 is reproduced by the semiconductor laser 6. Further, although this reflective film is generally formed by a physical vapor deposition method such as vapor deposition or sputtering, pinholes or the like may occur and the reflective film may be missing.
また、一般的には射出成形、射出・圧縮成形法
によりスタンパーよりの信号が転写されデイジタ
ル信号の入つた樹脂基板が成形されるが、スタン
パー表面にホコリが付着したり、記録時に欠陥な
どが生じた場合にはデイジタル信号は欠落する。
デイジタル信号が欠落した場合は、デイジタル信
号再生装置（例えばコンパクトデイスクプレヤ
ー）が再生不可能となり再生音に問題が生じる。 In general, injection molding or injection/compression molding methods are used to transfer signals from a stamper and mold a resin substrate containing digital signals, but dust may adhere to the stamper surface or defects may occur during recording. In this case, the digital signal will be lost.
If the digital signal is lost, the digital signal reproducing device (for example, a compact disc player) will be unable to reproduce the signal, resulting in a problem with the reproduced sound.
従来はこのようなデイスク特有の欠陥に対する
トレース性能をテストするためのデイジタル信号
再生用デイスクが無かつたため、デイジタル信号
再生装置のトレース性能を判定する基準を設ける
ことができなかつた。したがつて上記再生装置の
トレース性能向上を図ることが困難であつたなど
の問題点を有していた。 Conventionally, there has been no digital signal reproducing disk for testing the trace performance against such disk-specific defects, so it has been impossible to provide a standard for determining the trace performance of a digital signal reproducing device. Therefore, it has been difficult to improve the tracing performance of the reproducing apparatus.
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
イジタル信号再生装置のトレース性能をテストす
るためのデイジタル信号再生用テストデイスクを
寸法精度良く、信頼性も高く、しかも大量に安価
に製造できる製造方法を提供するものである。Purpose of the Invention The present invention solves these problems by manufacturing a digital signal reproducing test disk with high dimensional accuracy, high reliability, and in large quantities at low cost for testing the trace performance of a digital signal reproducing device. This provides a manufacturing method that can
発明の構成
本発明は、情報の含まれたスタンパーの信号領
域に、彫刻等の方法により上記信号のトラツク方
向の幅を一定にした数本の信号再生不可能部分を
設け、成形法によりこのスタンパーからデイジタ
ル信号再生装置のトレース性能をテストするため
に使用されるデイジタル信号再生用のテストデイ
スクを製造するものである。Structure of the Invention The present invention provides several signal non-reproducible portions with a constant width in the track direction of the signal by a method such as engraving in the signal area of a stamper containing information, and the stamper by a molding method. The company manufactures test disks for digital signal reproduction, which are used to test the trace performance of digital signal reproduction devices.
実施例の説明
以下に本発明のデイジタル信号再生用テストデ
イスクの一実施例を示す。DESCRIPTION OF THE EMBODIMENTS An embodiment of the digital signal reproducing test disk of the present invention will be described below.
第２図に本発明のデイジタル信号再生用テスト
デイスク作製用のスタンパーを示す。第２図ａは
スタンパーの平面図、第２図ｂは断面拡大図であ
る。 FIG. 2 shows a stamper for producing a test disk for digital signal reproduction according to the present invention. FIG. 2a is a plan view of the stamper, and FIG. 2b is an enlarged sectional view.
スタンパー７の情報の含まれた信号領域８の内
部に彫刻によりトラツク方向の幅が一定な３種類
の矩形の信号再生不可能部分９を形成する。次に
スタンパー７を成形金型に取り付け、射出成形法
により樹脂基板を成形し、デイスクを作製する。 Three types of rectangular non-reproducible portions 9 with constant widths in the track direction are formed by engraving inside the signal area 8 containing information of the stamper 7. Next, the stamper 7 is attached to a mold, and the resin substrate is molded by injection molding to produce a disk.
第３図に本発明のデイジタル信号再生用テスト
デイスクを示す。第３図ａはデイスク平面図、第
３図ｂはデイジタル信号再生不可能部分の平面拡
大図、第３図ｃは断面拡大図である。 FIG. 3 shows a test disk for digital signal reproduction according to the present invention. FIG. 3a is a plan view of the disk, FIG. 3b is an enlarged plan view of a portion where digital signals cannot be reproduced, and FIG. 3c is an enlarged sectional view.
スタンパーのデイジタル信号再生不可能部分９
は成形法により転写されデイスクにデイジタル信
号再生不可能部分１０が成形される。この上にア
ルミニウム反射膜４が形成され、反射膜を保護す
るための保護膜５がコーテイングされる。 Stamper digital signal non-reproducible part 9
is transferred by a molding method to form a digital signal non-reproducible portion 10 on the disc. An aluminum reflective film 4 is formed on this, and a protective film 5 for protecting the reflective film is coated.
デイジタル信号再生不可能部分をスタンパーに
形成する場合に、彫刻のかわりにレーザ加工や放
電加工また腐蝕による化学的エツチング法、また
はスタンパー表面の人為的に欠陥を付けることが
有効である。 When forming a portion on a stamper in which a digital signal cannot be reproduced, it is effective to use laser machining, electrical discharge machining, chemical etching by corrosion, or artificially create defects on the surface of the stamper instead of engraving.
また、情報の含まれた信号領域にデイジタル信
号再生不可能部分を設ける他の実施例として、ガ
ラス原盤にデイジタル信号を記録する場合に、上
記信号のトラツク方向の幅を一定にした数本の信
号再生不可能部分をレーザ変調による電気的な制
御方法によつて作製することが可能であり、この
場合前述の実施例よりも寸法精度がよく信頼性が
高いという利点がある
発明の効果
本発明のように、情報の含まれたスタンパー内
の信号領域に、彫刻等の方法により上記信号のト
ラツク方向の幅を一定にした数本の信号再生不可
能部分を設け、このスタンパーによりデイジタル
信号再生用テストデイスクを成形により作製すれ
ば、寸法精度が良く、信頼性の高いデイジタル信
号再生用テストデイスクとして大量に安価に製造
することができる。 In addition, as another example of providing a portion where digital signals cannot be reproduced in a signal area containing information, when recording a digital signal on a glass master disk, several signals having a constant width in the track direction of the above-mentioned signals are used. The non-reproducible portion can be manufactured by an electrical control method using laser modulation, and in this case, the advantage of the present invention is that the dimensional accuracy is better and the reliability is higher than that of the above-mentioned embodiments. In this way, in the signal area of the stamper that contains information, several unreproducible portions are provided by engraving or other methods to make the width of the signal in the track direction constant, and this stamper can be used for testing for digital signal reproduction. If the disk is manufactured by molding, it can be manufactured in large quantities at low cost as a test disk for digital signal reproduction with good dimensional accuracy and high reliability.
また、本発明によれば、デイジタル信号再生不
可能部分が正確で信頼性が高いため、デイジタル
信号再生装置のトレース性能をテストするデイス
クに適し、トレース性能の向上を推進することが
できる。 Further, according to the present invention, since the portion where the digital signal cannot be reproduced is accurate and highly reliable, it is suitable for a disk for testing the trace performance of a digital signal reproducing device, and it is possible to promote improvement in trace performance.
第１図ａ，ｂ，ｃは一般的なデイジタル信号再
生デイスクであるコンパクトデイスクの平面図、
断面部、および要部拡大図、第２図ａ，ｂは本発
明の一実施例におけるデイジタル信号再生用テス
トデイスク作製用のスタンパーの平面図および断
面拡大図、第３図ａ，ｂ，ｃは同実施例における
デイジタル信号再生用テストデイスクの平面図、
平面拡大図、および断面拡大図である。
１……デイスク、２……樹脂基板、３……デイ
ジタル信号、４……反射膜、５……保護膜、６…
…半導体レーザ、７……スタンパー、８……信号
領域、９，１０……デイジタル信号再生不可能部
分。
Figures 1a, b, and c are plan views of a compact disc, which is a general digital signal reproduction disc;
FIGS. 2a and 2b are a plan view and an enlarged cross-sectional view of a stamper for manufacturing a test disk for digital signal reproduction according to an embodiment of the present invention; FIGS. 3a, b, and c are A plan view of the test disk for digital signal reproduction in the same embodiment,
They are an enlarged plan view and an enlarged cross-sectional view. DESCRIPTION OF SYMBOLS 1... Disk, 2... Resin substrate, 3... Digital signal, 4... Reflective film, 5... Protective film, 6...
... Semiconductor laser, 7 ... Stamper, 8 ... Signal area, 9, 10 ... Portion where digital signals cannot be reproduced.
Claims (1)
彫刻等の方法により上記信号のトラツク方向の幅
を一定にした数本の信号再生不可能部分を設け、
成形法により、上記スタンパーからデイスクを作
製することを特徴とするデイジタル信号再生用テ
ストデイスクの製造方法。 ２ ガラス原盤にデイジタル信号を記録する場合
に上記信号のトラツク方向の幅を一定にした数本
の信号再生不可能部分を設け、このガラス原盤を
用いてスタンパーを作製し、上記スタンパーから
成形法によりデイスクを作製することを特徴とす
るデイジタル信号再生用テストデイスクの製造方
法。[Claims] 1. In the signal area in the stamper containing information,
Using a method such as engraving, several sections where the signal cannot be reproduced are provided with a constant width in the track direction of the signal.
A method for manufacturing a test disk for digital signal reproduction, characterized in that a disk is manufactured from the stamper by a molding method. 2. When recording a digital signal on a glass master disc, a number of signal non-reproducible parts are provided with a constant width in the track direction of the signal, a stamper is made using this glass master disc, and a stamper is formed from the stamper by a molding method. 1. A method for manufacturing a test disk for digital signal reproduction, the method comprising manufacturing a disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7401984A JPS60217544A (en) | 1984-04-13 | 1984-04-13 | Manufacture of test disk for digital signal reproduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7401984A JPS60217544A (en) | 1984-04-13 | 1984-04-13 | Manufacture of test disk for digital signal reproduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60217544A JPS60217544A (en) | 1985-10-31 |
| JPH0461417B2 true JPH0461417B2 (en) | 1992-09-30 |
Family
ID=13534978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7401984A Granted JPS60217544A (en) | 1984-04-13 | 1984-04-13 | Manufacture of test disk for digital signal reproduction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60217544A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2699349B2 (en) * | 1987-04-20 | 1998-01-19 | 松下電器産業株式会社 | Optical disk test disk and method of manufacturing the same |
| JP2770427B2 (en) * | 1989-06-13 | 1998-07-02 | ソニー株式会社 | Reference optical disc |
| JP2776205B2 (en) * | 1993-07-30 | 1998-07-16 | ティアック株式会社 | Inspection disk and manufacturing method thereof |
-
1984
- 1984-04-13 JP JP7401984A patent/JPS60217544A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60217544A (en) | 1985-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |