JPH0447911B2 - - Google Patents
Info
- Publication number
- JPH0447911B2 JPH0447911B2 JP58240199A JP24019983A JPH0447911B2 JP H0447911 B2 JPH0447911 B2 JP H0447911B2 JP 58240199 A JP58240199 A JP 58240199A JP 24019983 A JP24019983 A JP 24019983A JP H0447911 B2 JPH0447911 B2 JP H0447911B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- stamper
- recording
- resin
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- 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)
- 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またはオーデイオデイ
スクのような映像、音響、もしくは他の情報信号
が面の凹凸の形で記録されている信号記録スタン
パーやトラツク溝を有する信号記録スタンパーに
関するものである。信号記録スタンパーより信号
を転写する方法として、インジエクシヨンによる
方法、インジエクシヨンコンプレツシヨンによる
方法、紫外線硬化樹脂を用いる方法があるが本発
明は特にインジエクシヨンおよびインジエクシヨ
ンコンプレツシヨンによる方法に用いる信号記録
スタンパーに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to signal recording stampers or track grooves, such as video discs or audio discs, in which video, audio or other information signals are recorded in the form of surface irregularities. This invention relates to a signal recording stamper. Methods for transferring signals from a signal recording stamper include a method using in-die excision, a method using in-die excision compression, and a method using an ultraviolet curing resin. It concerns a record stamper.
従来例の構成とその問題点
通常、インジエクシヨンあるいは、インジエク
シヨンコンプレツシヨンの方法により転写する場
合、第１図に示すように金型１に内外周および裏
面を加工したスタンパー２をホルダー３にて取り
付け、溶解した樹脂を金型１内に射出し、圧力を
加え冷却することによりデイスクを作製する。こ
れに用いる信号記録スタンパーの信号４の半径方
向の形状は、第２図に示すように長方形に近い台
形であり多少のバラツキはあるが、上辺と底辺の
比率は1.2から1.4倍である。Conventional structure and its problems Normally, when transferring by the in-die extension or in-die extension compression method, a stamper 2 with a mold 1 having the inner and outer periphery and back surface processed is placed in a holder 3 as shown in Fig. 1. The disk is manufactured by injecting the melted resin into the mold 1, applying pressure and cooling it. The radial shape of the signal 4 of the signal recording stamper used for this is a trapezoid close to a rectangle as shown in FIG. 2, and although there is some variation, the ratio of the top side to the bottom side is 1.2 to 1.4 times.
しかしながら、上記のような方法においては次
のような問題がある。 However, the above method has the following problems.
インジエクシヨンあるいは、インジエクシヨン
コンプレツシヨンのように、金型中央より信号４
の凹凸が数100Åから数1000Åのスタンパー表面
にそつて金型内に溶解した樹脂を射出し、圧力を
加え冷却することにより信号４を転写しデイスク
を作製する場合に、信号４の形状が長方形に近い
場合、スタンパー信号面上の樹脂の流れと反対側
の鏡面部分の樹脂の流れに違いが生じ、断層ある
いは歪が発生し、デイスク側の信号に亀裂が出来
たり、複屈折率が悪くなる。従つて信号転写時の
成形条件の選び方が難しく、樹脂の射出速度、圧
力、温度などが少しずれただけで転写が悪くなつ
てしまう。 Signal 4 is sent from the center of the mold like an injection extension or an injection compression.
When manufacturing a disk by injecting molten resin into a mold along the stamper surface with irregularities ranging from several 100 Å to several 1000 Å, and applying pressure and cooling, the signal 4 is transferred into a rectangular shape. If it is close to , there will be a difference between the flow of resin on the stamper signal surface and the flow of resin on the mirror surface on the opposite side, causing faults or distortions, resulting in cracks in the signal on the disk side and poor birefringence. . Therefore, it is difficult to select molding conditions during signal transfer, and even a slight deviation in resin injection speed, pressure, temperature, etc. will result in poor transfer.
発明の目的
本発明の目的は、信号記録スタンパーを用いイ
ンジエクシヨンあるいはインジエクシヨンコンプ
レツシヨンの方法により信号を転写する場合、記
録信号の形状を変えることにより、転写性をよく
し、デイスク作製効率を上げようとするものであ
る。OBJECTS OF THE INVENTION An object of the present invention is to improve the transferability and improve the disk manufacturing efficiency by changing the shape of the recording signal when a signal is transferred using a signal recording stamper by the in-die expulsion or in-die expulsion compression method. It is something that I am trying to raise.
発明の構成
本発明のスタンパーは、記録信号の形状を、上
辺と底辺との比率が1.5以上となるような台形に
することによりインジエクシヨンあるいは、イン
ジエクシヨンコンプレツシヨンの方法による樹脂
の流れをよくし、信号転写を容易にするものであ
る。Structure of the Invention The stamper of the present invention improves the flow of resin by the in-die extrusion or in-die extrusion compression method by making the shape of the recording signal into a trapezoid with a ratio of the top side to the bottom side of 1.5 or more. This facilitates signal transfer.
実施例の説明
以下本発明の一実施例について図面を参照しな
がら説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
第３図は、本発明の一実施例における記録信号
の半径方向の断面図であり、信号５の形状の上辺
と底辺との比率を1.5から２にしたものである。
この形状の記録信号５を有するスタンパーを用い
て信号を転写する場合、樹脂の流れがよくなり、
成形条件にかなりの余裕が出来ただけでなく、デ
イスク側の信号に断層あるいは歪などがなくなつ
た。また転写により作製したデイスクより信号に
レーザをあて反射光より信号を再生する場合、記
録信号が長方形に近い場合（上辺と底辺の比率が
1.2倍程度）に比べ信号からの反射光量が15％程
度増え、電気特性にも余裕をもつことが出来る。 FIG. 3 is a radial cross-sectional view of a recording signal according to an embodiment of the present invention, in which the ratio of the top side to the bottom side of the shape of the signal 5 is changed from 1.5 to 2.
When transferring a signal using a stamper having a recording signal 5 of this shape, resin flows better,
Not only was there a considerable amount of leeway in the molding conditions, but there were no faults or distortions in the signal on the disk side. In addition, when the signal is reproduced from the reflected light by applying a laser to the signal from a disk made by transfer, if the recorded signal is close to a rectangle (the ratio of the top side to the bottom side is
The amount of reflected light from the signal is increased by about 15% compared to the previous model (approximately 1.2 times), and the electrical characteristics can also be made more flexible.
このような台形の記録信号を作製するには、幾
つかの方法がある。第１として記録時のレーザ絞
り込みレンズを開口率の小さなものにする、第２
として絞り込レンズ前までのビームを平行光より
ずらす、第３として記録時のフオーカス位置を無
理にずらす、などの方法によりビームを拡げれば
よい。すなわちレジスト上での露光ビームを拡げ
ることにより台形の記録信号を作製する。さらに
は、感度の低いレジストを使用したり、現像にお
いて現像の途中で止めるなどの方法によりさらに
上辺と底辺の比の大きな記録信号を作製すること
が出来る。 There are several methods for creating such a trapezoidal recording signal. The first is to use a laser aperture lens with a small aperture ratio during recording.
As a third method, the beam may be expanded by shifting the beam in front of the aperture lens from parallel light, or as a third method, forcibly shifting the focus position during recording. That is, a trapezoidal recording signal is created by expanding the exposure beam on the resist. Furthermore, by using a resist with low sensitivity or by stopping the development midway through development, it is possible to create a recording signal with an even larger ratio between the top side and the bottom side.
尚、本発明は凸状の信号のみならず、凹状のト
ラツク溝にも適用できる。 The present invention can be applied not only to convex signals but also to concave track grooves.
発明の効果
以上の発明から明らかなように、本発明は面上
に凹凸状の信号もしくはトラツク溝を形成したス
タンパーより、インジエクシヨンあるいはインジ
エクシヨンコンプレツシヨンの方法により、記録
信号を転写する場合において、記録信号の半径方
向の形状を、上辺と底辺の比率が1.5以上となる
ような台形にすることにより、転写時の樹脂の流
れをよくし、デイスクの断層、歪などを無くすこ
とが出来、またデイスクより信号にレーザをあて
反射光より信号を再生する場合、信号からの反射
光量を増すことが出来、再生時の電気特性に余裕
を持たすことが出来る。Effects of the Invention As is clear from the invention described above, the present invention is applicable to the case where a recorded signal is transferred by the method of injecting or injecting compression from a stamper having uneven signals or track grooves formed on its surface. By making the radial shape of the recording signal into a trapezoid with a ratio of the top side to the bottom side of 1.5 or more, it is possible to improve the flow of resin during transfer and eliminate disk faults and distortions. Furthermore, when a laser is applied to a signal from a disk and the signal is reproduced from the reflected light, the amount of reflected light from the signal can be increased, and the electrical characteristics at the time of reproduction can have a margin.
第１図は記録信号スタンパーを金型に取り付け
たところの断面図、第２図は従来の記録信号スタ
ンパーの記録信号の半径方向の断面図、第３図は
本発明の一実施例における記録信号スタンパーの
記録信号の半径方向の断面図である。
１……金型、２……記録信号スタンパー、３…
…記録スタンパー取付けホルダー、４，５……信
号。
FIG. 1 is a sectional view of a recording signal stamper attached to a mold, FIG. 2 is a radial sectional view of a recording signal of a conventional recording signal stamper, and FIG. 3 is a recording signal of an embodiment of the present invention. FIG. 3 is a radial cross-sectional view of a stamper recording signal. 1... Mold, 2... Recording signal stamper, 3...
...recording stamper mounting holder, 4, 5...signal.
Claims (1)
は凹状のトラツク溝の、上記スタンパーの半径方
向の断面形状を、凸状時には底辺が上辺の1.5倍
以上、凹状時には上辺が底辺の1.5倍以上となる
ような台形にしたことを特徴とする信号記録スタ
ンパー。1 The cross-sectional shape of the convex signal or concave track groove formed on the surface of the stamper in the radial direction of the stamper shall be such that when convex, the base is at least 1.5 times the top, and when concave, the top is at least 1.5 times the base. A signal recording stamper characterized by its trapezoidal shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58240199A JPS60131652A (en) | 1983-12-20 | 1983-12-20 | Signal recording stamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58240199A JPS60131652A (en) | 1983-12-20 | 1983-12-20 | Signal recording stamper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60131652A JPS60131652A (en) | 1985-07-13 |
| JPH0447911B2 true JPH0447911B2 (en) | 1992-08-05 |
Family
ID=17055928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58240199A Granted JPS60131652A (en) | 1983-12-20 | 1983-12-20 | Signal recording stamper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131652A (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512657B2 (en) * | 1972-02-15 | 1980-04-03 | ||
| DE2603888B2 (en) * | 1975-02-24 | 1977-12-15 | MCA Disco-Vision, Znc, Universal City, Calif. (V-StA.) | Process for the production of a replica die for information carrier and die for the formation of video disc reproduction |
| JPS5210102A (en) * | 1975-07-15 | 1977-01-26 | Canon Inc | Recording medium |
| NL7809227A (en) * | 1978-09-11 | 1980-03-13 | Philips Nv | RECORD CARRIER WITH AN OPTICALLY READABLE, RADIATION-REFLECTING INFORMATION STRUCTURE. |
| NL7810462A (en) * | 1978-10-19 | 1980-04-22 | Philips Nv | REGISTRATION CONTAINER IN WHICH INFORMATION IS PRESENTED IN AN OPTICALLY READABLE RADIATION-REFLECTING INFORMATION STRUCTURE |
| JPS55101143A (en) * | 1979-01-29 | 1980-08-01 | Teac Co | Optical reproducing disc |
| JPS5885936A (en) * | 1981-11-16 | 1983-05-23 | Toshiba Corp | Optical information recording and reproducing device |
| JPS58185049A (en) * | 1982-04-22 | 1983-10-28 | Hitachi Ltd | Stamper and its production |
-
1983
- 1983-12-20 JP JP58240199A patent/JPS60131652A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60131652A (en) | 1985-07-13 |
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