JPS61180948A - Production of information disk - Google Patents

Abstract

PURPOSE:To obtain information disks which are suited to the mass production with high dimensional accuracy by reproducing plural information disks at a time with a single sheet of metallic mold containing plural pieces of disk information recorded at its circumferential area. CONSTITUTION:A metallic mold 22 containing plural pieces of disk information 21 recorded on its surface is fixed on a metallic mold stage 20. A replica substrate 24 is held by a support shaft 25 with a proper gap secured to the mold 22, and the photosensitive resin 29 is filled into a gap formed by the substrate 24 and the mold 22 from a gap 28 formed between the shaft 25 and a through hole 23. Then the substrate 24 is moved down to spread the resin 29 over the entire said gap, and the ultraviolet rays are irradiated on the substrate 24 from outside. Thus the resin 29 is solidified, then removed from the mold 22. In such a way, the disk information 21 recorded on the mold 22 are reproduced on the surface of the resin 29. Then, each information disk 30 is separated by the laser work or the cutting work.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ディスクなどの情報媒体となる情報ディス
クの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing an information disc that serves as an information medium such as an optical disc.

〔従来の技術〕[Conventional technology]

情報ディスクには種々のものがあり、その一種である光
ディスク１の構造の一例を第３図に示す。There are various types of information discs, and an example of the structure of an optical disc 1, which is one of them, is shown in FIG.

すなわち、光ディスク１は、上下の外層部をなす基板２
．３の内面に、凹凸状の記録面が形成された樹脂層４．
５を各々固着した一対のディスク体１ａ、ｌｂよりなり
、これらの樹脂層４，５はスペーサ６＃７を介して相対
向しているものであり、光ディスク１の中央には、光デ
ィスク１を回転駆動させる駆動体（図示すず）と嵌合す
るための透孔８を形成している。That is, the optical disc 1 includes a substrate 2 forming the upper and lower outer layers.
．． A resin layer 4 having an uneven recording surface formed on the inner surface of the resin layer 3.
These resin layers 4 and 5 are opposed to each other with a spacer 6 #7 in between, and the optical disc 1 is placed in the center of the optical disc 1. A through hole 8 is formed for fitting a driving body (not shown) to be driven.

ところで、上記光ディスク１は、通常、下記のようにし
て製造される。すなわち、第４図に章すように、金型台
９に、表面にディスク情報１０αを凹凸状に記録した金
型１０を載置し、機械的にまたは接着剤によって固定し
て、この金型台９と金型１０の中央に形成した通孔１１
に支持軸１２を上下動可能に配置する。この支持軸１２
の上部には、レプリカ基板１３の中央孔１３４の開部を
挾持する受部１２５を設けである。By the way, the above-mentioned optical disc 1 is normally manufactured as follows. That is, as shown in FIG. 4, a mold 10 with disk information 10α recorded in a concave and convex manner on the surface is placed on a mold stand 9, and fixed mechanically or with adhesive. A through hole 11 formed in the center of the stand 9 and the mold 10
A support shaft 12 is arranged so as to be movable up and down. This support shaft 12
A receiving portion 125 is provided on the top of the replica substrate 13 for holding the opening of the central hole 134 of the replica substrate 13.

製造方法の第１工程としては、支持軸１２の受部１２ｃ
Ｌにレプリカ基板１３の中央孔１３ｚｌ！ｉｉ部を嵌着
し、このレプリカ基板１３を支持軸１２にて金型１０と
適宜の間隙を保持する。そして、この保持状態にしたま
まで、支持軸１２と通孔１１との間に形成される間隙１
４から、公知の感光性樹脂１５を前記レプリカ基板１３
と金型１０とで形成される間隙へ流入させる。その後、
第４図（ｂ）に示すように、レプリカ基板１３を支持軸
１２にて下降させ、感光性樹脂１５を押圧して、レプリ
カ基板１３と金型１０との間隙の全域に感光性樹脂１５
が行きわたるようにする。As the first step of the manufacturing method, the receiving portion 12c of the support shaft 12 is
Center hole 13zl of replica board 13 in L! The replica substrate 13 is held by the supporting shaft 12 with an appropriate gap between the replica substrate 13 and the mold 10. Then, while maintaining this holding state, a gap 1 is formed between the support shaft 12 and the through hole 11.
4, a known photosensitive resin 15 is applied to the replica substrate 13.
and the mold 10. after that,
As shown in FIG. 4(b), the replica substrate 13 is lowered by the support shaft 12, the photosensitive resin 15 is pressed, and the photosensitive resin 15 is applied to the entire gap between the replica substrate 13 and the mold 10.
Make sure that it is widely distributed.

ここで、紫外Ｉ！透過性材料より形成しである前記レプ
リカ基板１３の外方より、紫外＃Ｍ１６を感光性樹脂１
５に照射して、感光性樹脂１５を固形化する。そして、
この固形化処理の後、レプリカ基板１３と感光性樹脂１
５を、一体的に禎４図Ｃに示すように外内側部を金型１
０から剥離して行き、支持軸１２にて固着状態になって
いる最内間部分まで剥離が完了したところで、金型１０
からの複製作業が終了する。Here, ultraviolet I! Ultraviolet #M16 is applied to the photosensitive resin 1 from the outside of the replica substrate 13 made of a transparent material.
5 to solidify the photosensitive resin 15. and,
After this solidification process, the replica substrate 13 and the photosensitive resin 1
5, and as shown in Figure 4C, mold the outer and inner parts into mold 1.
0, and when the peeling is completed to the innermost part that is fixed on the support shaft 12, the mold 10
The replication process from

そして、上述のようにして出来上がった情報ディスク体
１ｃＬを、既述した第３図のような光ディスク１に組立
てるのである。Then, the information disc body 1cL completed as described above is assembled into the optical disc 1 as shown in FIG. 3 described above.

ところで、上述した情報ディスク体１ｃＬの製造方法で
は、支持軸１２にて固着状態になっている情報ディスク
体１５の内周部に、剥離作業の時に応力が加わることに
なり、内周部が変形したり、また内周部に内部歪みが残
留する。従って、光ディスク１として組立てた時、透孔
８部分の寸法精度がでず、配録再生時のトラッキング精
度が落ちるという欠点があった。By the way, in the method for manufacturing the information disc body 1cL described above, stress is applied to the inner peripheral part of the information disc body 15 that is fixed by the support shaft 12 during the peeling operation, and the inner peripheral part is deformed. Or, internal distortion remains on the inner circumference. Therefore, when the optical disc 1 is assembled, the dimensional accuracy of the through hole 8 portion is not achieved, and the tracking accuracy during recording and playback is degraded.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は、上述した従来技術が有する欠点を解消し、情
報ディスク体の寸法精度がでて、しかも耐産に適した情
報ディスクの製造方法を提供するものである。The present invention eliminates the drawbacks of the above-mentioned conventional techniques, and provides a method for manufacturing an information disc that achieves dimensional accuracy of the information disc body and is suitable for production durability.

〔問題点を解決するための手段〕[Means for solving problems]

上述した従来技術の問題点を解決するため、本発明は、
金型台に載置固定した金型とレプリカ基板との間に、感
光性樹脂を介在し、レプリカ基板にて感光性樹脂を金型
に押圧した後、感光性樹脂。In order to solve the problems of the prior art described above, the present invention
A photosensitive resin is interposed between the mold placed and fixed on the mold stand and the replica substrate, and after pressing the photosensitive resin against the mold with the replica substrate, the photosensitive resin is removed.

に光を照射して固形化し、レプリカ基板と感光性樹脂を
金型から外すことにより金型から情報を転写する情報デ
ィスクの製造方法において、複数のディスク情報を置部
に記録した１枚の金型にて、複数の情報ディスク体を同
時に複製するようにしたＯ 〔実晦例〕 以下、本発明の一実施例を第１図及び第２図に基づき説
明する。In the method for manufacturing information discs, information is transferred from the mold by solidifying the replica substrate and photosensitive resin by irradiating it with light, and then removing the replica substrate and photosensitive resin from the mold. A plurality of information disc bodies are simultaneously duplicated using a mold. [Example] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

金型台２０に、に、複数（本実施例では４ケ所）のディ
スク情報２１を表面に形成した金型２２を載置固着する
。この金型２２は、一枚の析伏体に上述の複数のディス
ク情報２１を形成するようにしても良いし、また複数の
独立した金型な組合せて一体的な金型２２としても良い
。しかし、複数の独立した金型を組合せる場合には、金
型同士の接合部分に数μｍ以上の段差が生じると感光性
樹脂が均一に金型表面に行きわたらなくなるため、一枚
の金型２２に複数のディスク情報を記録させる前者の方
法が良い。A mold 22 having a plurality of (four locations in this embodiment) disk information 21 formed on its surface is placed and fixed on the mold stand 20 . This mold 22 may be configured to form the above-mentioned plurality of disk information 21 on a single decomposition body, or may be formed into an integrated mold 22 by combining a plurality of independent molds. However, when combining multiple independent molds, if there is a step difference of several μm or more at the joint between the molds, the photosensitive resin will not be uniformly distributed over the mold surface, The former method of recording a plurality of disc information on the disc 22 is preferable.

前記金１Ｍ２２の中央に通孔２３を穿設し、この通孔２
３にレプリカ基板２４を支持する支持軸２５を上下動可
能に挿通する。レプリカ基板２４の材料は紫外線を透過
させるものであれば良いが、後加工のし易さを考えると
、加工性の良いエポキシ樹脂、アクリル樹脂、ポリカー
ボネート樹脂を使用すると良い。またレプリカ基板２４
は、外径を前記金型２２より大きくし、中央に形成した
中央孔２６の径を支持軸２５の外径より小さくシ、支持
軸ｚ５に設けた受部２７にて前記中央孔２６鴫部を挾持
されている。A through hole 23 is bored in the center of the gold 1M22, and this through hole 2
3, a support shaft 25 that supports the replica board 24 is inserted so as to be vertically movable. The material of the replica substrate 24 may be any material that transmits ultraviolet rays, but in consideration of ease of post-processing, it is preferable to use epoxy resin, acrylic resin, or polycarbonate resin, which have good processability. Also, the replica board 24
The outside diameter is made larger than the mold 22, the diameter of the central hole 26 formed in the center is made smaller than the outside diameter of the support shaft 25, and the hollow part of the central hole 26 is made in the receiving part 27 provided on the support shaft z5. is being held.

そしてレプリカ基板２４を支持軸２５にて金型２２と適
宜の間隙を保持し、支持軸２５と通孔２３との間に形成
される間隙２８から、公知の感光性樹脂２９を前記レプ
リカ基板２４と金型２２とで形成する間隙へ流入する。Then, the replica substrate 24 is held with a suitable gap from the mold 22 by the support shaft 25, and a known photosensitive resin 29 is applied to the replica substrate 24 from the gap 28 formed between the support shaft 25 and the through hole 23. and the mold 22.

その後、第２図（ｂ）に示すように、レプリカ基板２４
を支持軸２５により下降させ、感光性樹脂２９を押圧し
て、レプリカ基板２４と金型２２との間隙の全域に感光
性樹脂２９が行きわたるようにする。Thereafter, as shown in FIG. 2(b), the replica substrate 24
is lowered by the support shaft 25 and presses the photosensitive resin 29 so that the photosensitive resin 29 is spread over the entire gap between the replica substrate 24 and the mold 22.

ここでレプリカ基板２４の外方より、紫外線を感光性樹
脂２９に照射して、感光性樹脂２９を固形化するっそし
て、この固形化処理の後、レアリカ基板２４と感光性樹
脂２９を、一体的に第２図（Ｃ）に示すように金型２２
から剥離すると、感光性樹脂２９の表面に金型２２に形
成された複数のディスク情報２１が複製される。Here, the photosensitive resin 29 is irradiated with ultraviolet rays from the outside of the replica substrate 24 to solidify the photosensitive resin 29. After this solidification process, the Realica substrate 24 and the photosensitive resin 29 are integrated. As shown in FIG. 2(C), the mold 22
When the disc information 21 is peeled off from the mold 22, the plural disc information 21 formed on the mold 22 is duplicated on the surface of the photosensitive resin 29.

この剥離作秦の後、感光性樹脂２９の表面に公知のよう
に記録膜あるいは反射膜を形成し、その後、保護膜の形
成あるいは保護板の貼付を行う。After this peeling operation, a recording film or a reflective film is formed on the surface of the photosensitive resin 29 in a known manner, and then a protective film is formed or a protective plate is attached.

そしてレプリカ基板２４と感光性樹脂２９の一体物から
、レーザー加工あるいは切削加工（第２図（ｄ）の２点
鎖線）によって、個々のｔ′＃報ディスク体３０を分離
する。Then, individual t'# information disk bodies 30 are separated from the integrated body of the replica substrate 24 and the photosensitive resin 29 by laser processing or cutting processing (double-dashed line in FIG. 2(d)).

上述のような製造方法であるため、同時に複数の情報デ
ィスク体３０の複製、製造ができ、生産性が大巾に改善
され、また支持軸２５の受部２７の支持にて、剥離時に
変形を受は易いレプリカ基板２４の中央孔２６間部は、
その間部に位置する感光性樹脂２９と共に情報ディスク
体３０を形成することがなく、情報ディスク体３０に部
分的に残留応力が発生することがない。さらに情報ディ
スク体３０の外形及び中央に形成する孔３０αは、上述
の複製作業後に形成するため（第２図（ｅ））寸法精度
の向上が図られた。Because of the manufacturing method described above, it is possible to simultaneously duplicate and manufacture a plurality of information disk bodies 30, greatly improving productivity, and the support of the receiving part 27 of the support shaft 25 prevents deformation during peeling. The area between the center holes 26 of the replica board 24, which is easy to receive, is
The information disc body 30 is not formed together with the photosensitive resin 29 located therebetween, and no residual stress is generated locally in the information disc body 30. Furthermore, since the hole 30α formed in the outer shape and center of the information disc body 30 is formed after the above-described duplication operation (FIG. 2(e)), the dimensional accuracy is improved.

尚、上記実施例では、円形の情報ディスク体３゜の製造
方法を示したが、本発明の実施に当り、情報ディスク体
３０の形状は限定されるものではない。Incidentally, in the above embodiment, a method of manufacturing a circular information disk body 30 was shown, but the shape of the information disk body 30 is not limited in carrying out the present invention.

また金型２２の表面に形成される複数のディスク情報２
１は、異なる内容の情報であっても良く、すべて同一内
容の情報であっても良い。Also, a plurality of disc information 2 formed on the surface of the mold 22
1 may be information with different contents, or may be information with the same contents.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明は、量産に適し、しかも情
報ディスク体の寸法精度の向上が図れる情報ディスクの
製造方法を提供できる。As described above, the present invention can provide a method for manufacturing an information disc that is suitable for mass production and that can improve the dimensional accuracy of the information disc body.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図は本発明の一実施例を示し、第１図は金
型の平面図、第２図（α）〜第２図（ｅ）は情報ディス
ク体の製造工程を説明するための図、第３図は情報ディ
スクの概要を示す断面図、第４図（α）〜第４図（Ｃ）
は従来の情報ディスク体の製造工程を説明するための図
である。 ２０・・・・・・金型台、２１・・・・・・複数のディ
スク情報、２２・・・・・・金型、２４・・・・・・レ
プリカ基板、２９・・・・・・感光性樹脂、３０・・・
・・・情報ディスク体。。 第１図 ２０−一一金型臼 ２１−−−−−テ°イスク小青報 ２２−−−−−金型 ２４−−一一−レプリカ基拒 ２９　−一−−−使に光ｌ：生樹月凰 ３０−−−一−ｌ隣報デ≧スク体 第２図 （Ｑ） （Ｃ） 第２図 （ｄ） 第３図Fig. 1 and Fig. 2 show one embodiment of the present invention, Fig. 1 is a plan view of the mold, and Fig. 2 (α) to Fig. 2 (e) explain the manufacturing process of the information disc body. Figure 3 is a sectional view showing the outline of the information disk, Figures 4 (α) to 4 (C)
FIG. 1 is a diagram for explaining the manufacturing process of a conventional information disc body. 20... Mold stand, 21... Multiple disk information, 22... Mold, 24... Replica board, 29... Photosensitive resin, 30...
...Information disc body. . Fig. 1 20-11 Mold die 21 -----Tesuku small blueprint 22 ----- Mold 24--11- Replica model 29 -1-- Light used for use: Ikijugetsou 30 --- 1-l Neighborhood report ≧ Scroll figure 2 (Q) (C) Figure 2 (d) Figure 3

Claims (1)

【特許請求の範囲】[Claims] 　金型台に載置固定した金型とレプリカ基板との間に、
感光性樹脂を介在し、レプリカ基板にて感光性樹脂を金
型に押圧した後、感光性樹脂に光を照射して固形化し、
レプリカ基板と感光性樹脂を金型から外すことにより金
型から情報を転写する情報ディスクの製造方法において
、複数のディスク情報を周部に記録した１枚の金型にて
、複数の情報ディスク体を同時に複製するようにしたこ
とを特徴とする情報ディスクの製造方法。Between the mold placed and fixed on the mold stand and the replica board,
After pressing the photosensitive resin onto a mold using a replica substrate with a photosensitive resin interposed, the photosensitive resin is irradiated with light to solidify it.
In an information disc manufacturing method in which information is transferred from a mold by removing a replica substrate and a photosensitive resin from the mold, a plurality of information disc bodies can be manufactured using a single mold in which information on a plurality of discs is recorded on the periphery. A method for manufacturing an information disc, characterized in that the information discs are simultaneously duplicated.