JPH03232135A - Manufacture of optical disk - Google Patents
Manufacture of optical diskInfo
- Publication number
- JPH03232135A JPH03232135A JP2890490A JP2890490A JPH03232135A JP H03232135 A JPH03232135 A JP H03232135A JP 2890490 A JP2890490 A JP 2890490A JP 2890490 A JP2890490 A JP 2890490A JP H03232135 A JPH03232135 A JP H03232135A
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- disk
- disk substrate
- pressure
- substrates
- 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 description 10
- 230000003287 optical effect Effects 0.000 title claims description 10
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 239000004831 Hot glue Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- 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、光学的に情報を記録および／または再生ある
いは消去可能な光ディスクの製造方法に関し、とくに、
少なくとも一方に情報記録部を有する２枚のディスク基
板をホットメルト接着剤を介して加圧して貼り合わせて
なる光ディスクの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing an optical disc on which information can be optically recorded and/or reproduced or erased.
The present invention relates to a method of manufacturing an optical disc in which two disc substrates each having an information recording section on at least one of them are bonded together by pressing together with a hot melt adhesive.
（従来技術およびその課題）
従来、少なくとも一方に情報記録部を有する２枚のディ
スク基板の前記情報記録部を内側にしてホットメルト接
着剤を介して前記２枚のディスク基板を加圧して貼り合
わせてなる光ディスクが知られているが、この場合、第
３図に断面図として示すように、ディスク基板１．２の
それぞれをアクリル樹脂などにより射出成形により成形
し、あらかじめ金型上に設けられたスタンパの微細な凹
凸をディスク基板１．２表面に転写し、該微細な凹凸上
にアルミニュウム反射膜１１．２１を蒸着して情報記録
部を形成し、さらにホットメルト接着剤からなる保護コ
ート膜１２．２２を形成した後、こうして得られたディ
スク基板１．２同志をホットメルト接着剤３を介して貼
り合わせるには、これら２枚のディスク基板を２枚のプ
レス板４間に挟持して、均一な圧力Ｐをかけて貼り合わ
せていた。(Prior Art and its Problems) Conventionally, two disk substrates each having an information recording section on at least one side are pasted together with the information recording section inside by pressing the two disk substrates together using a hot melt adhesive. In this case, as shown in the cross-sectional view in FIG. The fine irregularities of the stamper are transferred to the surface of the disk substrate 1.2, and an aluminum reflective film 11.21 is deposited on the fine irregularities to form an information recording section, and a protective coating film 12 made of hot melt adhesive is further formed. After forming .22, in order to bond the thus obtained disk substrates 1.2 together via hot melt adhesive 3, these two disk substrates are sandwiched between two press plates 4, They were bonded together by applying a uniform pressure P.
ところが、上記従来の方法であると、ディスク基板１．
２同志の剥がれを防止するなめに大きな圧力で加圧し貼
り合わせると、ディスク基板１．２同志の接合は強固に
なるものの、ディスク基板１．２に吸湿あるいは高温に
より歪みが生じると、ディスク基板１．２の情報記録部
にも応力が生じ、情報の記録および／または読取りのエ
ラーとなる。However, in the above conventional method, the disk substrate 1.
If the disk substrates 1 and 2 are bonded together by applying large pressure to prevent them from peeling off, the bond between the disk substrates 1 and 2 becomes strong, but if the disk substrates 1 and 2 become distorted due to moisture absorption or high temperature, the disk substrates 1 and 2 may become distorted. Stress also occurs in the information recording section of .2, resulting in errors in recording and/or reading information.
また小さな圧力で加圧し貼り合わせると、ディスク基板
１．２同志か剥かれるおそれがあった。Furthermore, if the disk substrates 1 and 2 were bonded together with a small amount of pressure, there was a risk that the disk substrates 1 and 2 would peel off from each other.
（課題を解決するための手段）
本発明は、上記従来の点に鑑みなされたものであって、
少なくとも一方に情報記録部を有する２枚のディスク基
板の前記情報記録部を内側にしてホットメルト接着剤を
介して前記２枚のディスク基板を加圧して貼り合わせる
に際し、ディスク基板の非情報記録部箇所を情報記録部
箇所よりも大きい圧力で加圧して、ディスク基板同志の
剥がれを防止すると共に、情報の記録および／または読
取りにエラーが生じるのを防止した光ディスクの製造方
法を堤供するものである。(Means for Solving the Problem) The present invention has been made in view of the above-mentioned conventional points, and includes:
When bonding two disk substrates having an information recording section on at least one side with the information recording section inside and pressing the two disk substrates together using a hot melt adhesive, the non-information recording section of the disk substrate The present invention provides a method for manufacturing an optical disc in which the parts are pressurized with a higher pressure than the information recording parts to prevent the disc substrates from peeling off from each other and to prevent errors from occurring in recording and/or reading information. .
（実施例）
以下、本発明を第１〜２図に示す実施例に基づいて説明
する。(Example) Hereinafter, the present invention will be explained based on the example shown in FIGS. 1 and 2.
第１図は、本発明の光ディスクの製造方法の一実施例を
示す断面図、第２図は本発明の光ディスクの製造方法の
別の実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of the optical disc manufacturing method of the present invention, and FIG. 2 is a sectional view showing another embodiment of the optical disc manufacturing method of the invention.
第１図に断面図として示すように、ディスク基板１．２
のそれぞれをアクリル樹脂などにより射出成形により成
形し、あらかじめ金型上に設けられたスタンパの微細な
凹凸をディスク基板１．２表面に転写し、該微細な凹凸
上にアルミニュウム反射膜１１．２１を蒸着して情報記
録部を形成し、さらにホットメルト接着剤からなる保護
コート膜１２．２２を形成した後、こうして得られたデ
ィスク基板１．２同志をホットメルト接着剤３を介して
貼り合わせるに際し、本発明においては、ディスク基板
１．２の内周側および外周側の非情報記録部箇所への加
圧力Ｐ１を、情報記録部箇所への加圧力Ｐ２よりも大き
くして加圧し貼り合わせる点に特徴がある。このため、
プレス板４の一方はディスク基板１．２の内周側および
外周側の非情報記録部箇所を加圧するためのブロック４
Ａと、情報記録部箇所を加圧するためのブロック４Ｂと
に分割しである。As shown in cross-section in FIG.
Each of these is molded by injection molding using acrylic resin or the like, and the fine irregularities of the stamper previously provided on the mold are transferred to the surface of the disk substrate 1.2, and an aluminum reflective film 11.21 is formed on the fine irregularities. After forming an information recording portion by vapor deposition and further forming a protective coating film 12.22 made of hot melt adhesive, when bonding the disk substrates 1.2 thus obtained together via hot melt adhesive 3. In the present invention, the pressing force P1 applied to the non-information recording portions on the inner and outer circumferential sides of the disk substrate 1.2 is made larger than the pressing force P2 applied to the information recording portions, and the disk substrates 1.2 and 2 are bonded together. There are characteristics. For this reason,
One side of the press plate 4 is a block 4 for pressurizing the non-information recording portions on the inner and outer circumferential sides of the disk substrate 1.2.
It is divided into a block A and a block 4B for pressurizing the information recording section.
ホットメルト接着剤としては、スチレン−イソプレン−
スチレンブロックコポリマーをベースポリマーとし、こ
れに粘着付与剤、安定剤を添加しし、軟化温度が８０〜
１２０℃、１２０℃でＢ型粘度計で測定した溶融粘度が
３００００〜２０００００センチポアズのものを好適に
使用することができるか、この場合、ディスク基板１．
２の内周側および外周側の非情報記録部箇所への加圧力
Ｐ１としては、２〜２０ｋｇ／ａｄとし、また情報記録
部箇所への加圧力Ｐ２としては０．１〜５ｋｇ／−とし
、かつＰ ＞２２とする。加圧時間としては、数秒とす
れば良い。好適には、Ｐｌとして１５ ｋｉｔ ／ ｃ
ｒＡ 、Ｐ ２として０．５ｋｇ／−とし、また加圧時
間としては７秒とする。As a hot melt adhesive, styrene-isoprene-
Styrene block copolymer is used as the base polymer, tackifier and stabilizer are added to this, and the softening temperature is 80~80.
120° C. Can a melt viscosity of 30,000 to 200,000 centipoise measured with a B-type viscometer at 120° C. be suitably used? In this case, the disk substrate 1.
The pressurizing force P1 to the non-information recording portions on the inner and outer circumferential sides of 2 is set to 2 to 20 kg/ad, and the pressurizing force P2 to the information recording portions is set to 0.1 to 5 kg/-, And P > 22. The pressurization time may be several seconds. Preferably 15 kit/c as Pl
rA and P2 are set to 0.5 kg/-, and the pressurization time is set to 7 seconds.
ディスク基板１．２の内周側および外周側の非情報記録
部箇所への加圧力を、情報記録部箇所への加圧力よりも
大きくして加圧し貼り合わせる手段としては、第１図に
示したものに限定されず、第２図に示すように情報記録
箇所に対応するプレス板４に凹部４１を形成し、ディス
ク基板１．２の内周側および外周側の非情報記録部箇所
への加圧力を、情報記録部箇所への加圧力よりも大きく
なるようにして貼り合わせても良い。また、図示したよ
うに加圧力を均一にするため、凹部４１内に緩衝シート
５を配設すると好適である。A method of applying pressure to the non-information recording portions on the inner and outer circumferential sides of the disk substrate 1.2 to be greater than the pressure applied to the information recording portions and bonding is shown in FIG. However, as shown in FIG. 2, recesses 41 are formed in the press plate 4 corresponding to the information recording areas, and the recesses 41 are formed in the non-information recording areas on the inner and outer sides of the disk substrate 1.2. They may be bonded together with a pressure greater than the pressure applied to the information recording portion. Further, as shown in the figure, it is preferable to arrange a buffer sheet 5 within the recess 41 in order to make the pressing force uniform.
（発明の効果）
以上の通り、本発明によれば、少なくとも一方に情報記
録部を有する２枚のディスク基板の前記情報記録部を内
側にしてホットメルト接着剤を介して前記２枚のディス
ク基板を加圧して貼り合わせるに際し、ディスク基板の
非情報記録部箇所を情報記録部箇所よりも大きい圧力で
加圧したので、ディスク基板の内周側および外周側でデ
ィスク基板の接合が強固となり、ディスク基板同志の剥
がれを防止すると共に、情報記録部箇所は小さい圧力で
加圧したので、ディスク基板が吸湿あるいは高温により
歪みが生じても、ディスク基板の情報記録部に応力が及
ぶのを防止するから、情報の記録および／または読取り
のエラーが生じるのを防止することができる等の利点を
有する。(Effects of the Invention) As described above, according to the present invention, two disk substrates each having an information recording section on at least one of the two disk substrates are bonded with the information recording section inside through a hot melt adhesive. When pressurizing and bonding the disks together, the non-information recording area of the disk substrate was pressurized with a higher pressure than the information recording area, so the bonding of the disk substrates was strong on the inner and outer circumferential sides of the disk substrate, and the disk In addition to preventing the substrates from peeling off from each other, the information recording section is pressurized with a small amount of pressure, so even if the disk substrate absorbs moisture or becomes distorted due to high temperature, stress will not be applied to the information recording section of the disk substrate. This has advantages such as being able to prevent errors in recording and/or reading information.
第１図は、本発明の光ディスクの製造方法の一実施例を
示す断面図、第２図は本発明の光ディスクの製造方法の
別の実施例を示す断面図、第３図は従来の光ディスクの
製造方法を示す断面図である。
図中、１．２はディスク基板、３はホットメルト接着剤
、４はプレス板である。FIG. 1 is a sectional view showing one embodiment of the optical disc manufacturing method of the present invention, FIG. 2 is a sectional view showing another embodiment of the optical disc manufacturing method of the invention, and FIG. 3 is a sectional view of a conventional optical disc. It is a sectional view showing a manufacturing method. In the figure, 1.2 is a disk substrate, 3 is a hot melt adhesive, and 4 is a press plate.
Claims (1)
基板の前記情報記録部を内側にしてホットメルト接着剤
を介して前記２枚のディスク基板を加圧して貼り合わせ
るに際し、ディスク基板の非情報記録部箇所を情報記録
部箇所よりも大きい圧力で加圧したことを特徴とする光
ディスクの製造方法。When bonding two disk substrates having an information recording section on at least one side with the information recording section inside and pressing the two disk substrates together using a hot melt adhesive, the non-information recording section of the disk substrate A method for manufacturing an optical disc, characterized in that a portion of the information recording portion is pressurized with a pressure greater than that of the information recording portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2890490A JPH03232135A (en) | 1990-02-08 | 1990-02-08 | Manufacture of optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2890490A JPH03232135A (en) | 1990-02-08 | 1990-02-08 | Manufacture of optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03232135A true JPH03232135A (en) | 1991-10-16 |
Family
ID=12261400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2890490A Pending JPH03232135A (en) | 1990-02-08 | 1990-02-08 | Manufacture of optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03232135A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128335A (en) * | 1988-11-08 | 1990-05-16 | Toshiba Emi Ltd | Manufacture of stuck disk |
-
1990
- 1990-02-08 JP JP2890490A patent/JPH03232135A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128335A (en) * | 1988-11-08 | 1990-05-16 | Toshiba Emi Ltd | Manufacture of stuck disk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6323239A (en) | Production of information recording medium | |
| AU744721B2 (en) | Dual-layer DVD disc, and method and apparatus for making same | |
| US4349499A (en) | Disc record preparation | |
| JPH1011800A (en) | Optical disk and its production | |
| JPH03232135A (en) | Manufacture of optical disk | |
| JPS61126648A (en) | Device and method for disc sticking | |
| JPH02282941A (en) | Optical disk and production thereof | |
| JP2553942B2 (en) | Method for manufacturing information recording medium | |
| JPS60261040A (en) | Optical information medium disc | |
| JPH01241046A (en) | Method and device for sticking disks together | |
| JPS58203645A (en) | Optical disc joining method | |
| JP2657276B2 (en) | Ventilated optical disk | |
| JPH03230337A (en) | Method for backing stamper | |
| JPH0732036Y2 (en) | Mold for laminating optical disks | |
| JP2721655B2 (en) | Composite optical disk structure | |
| JPS62264457A (en) | Optical information recording disk | |
| JPS61168149A (en) | Information recording disk | |
| JPS62231436A (en) | Optical disk substrate | |
| JPS6070540A (en) | Optical disc | |
| JPS62143243A (en) | Optical disk | |
| JPH0469828A (en) | Production of optical disk substrate | |
| JPH05290409A (en) | Optical disk | |
| JPS62222447A (en) | Optical recording disk | |
| JPH087336A (en) | Optical disk and its manufacture | |
| JPS6355741A (en) | Optical information recording disk medium having hollow structure and its production |