JPH02166641A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH02166641A JPH02166641A JP63321136A JP32113688A JPH02166641A JP H02166641 A JPH02166641 A JP H02166641A JP 63321136 A JP63321136 A JP 63321136A JP 32113688 A JP32113688 A JP 32113688A JP H02166641 A JPH02166641 A JP H02166641A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- recording medium
- optical recording
- signal
- medium according
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 34
- 239000000758 substrate Substances 0.000 claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000012780 transparent material Substances 0.000 claims description 8
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229920005668 polycarbonate resin Polymers 0.000 claims description 2
- 239000004431 polycarbonate resin Substances 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 23
- 239000002184 metal Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 125000006850 spacer group Chemical group 0.000 abstract description 8
- 238000007740 vapor deposition Methods 0.000 abstract description 4
- 239000011253 protective coating Substances 0.000 abstract description 3
- 238000004544 sputter deposition Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012461 cellulose resin Substances 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は読出し専用の光学式記録媒体に係り、特に生産
性の向上ならびに低価格化を図り得るようにした光学式
記録媒体に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a read-only optical recording medium, and particularly to an optical recording medium that can improve productivity and reduce costs. .
［従来の技術］
光学式記録は、磁気式記録と比較して記録媒体とヘッド
とが非接触であり、かつ高密度の記録が可能である等の
利点がある。この光学式記録媒体としては、読出し専用
のもの、追加書込み可能なもの、消去再書込み可能なも
のが知られており、本発明にかかる読出し専用の光学式
記録媒体としては、既に光学式ディスク（コンパクトデ
ィスク）や光学方式のビデオディスク、光カード等の形
で実用に洪されてきている。[Prior Art] Optical recording has advantages over magnetic recording in that there is no contact between the recording medium and the head, and high-density recording is possible. As this optical recording medium, there are known read-only ones, additionally writable ones, and erasable and rewritable ones. It has been put into practical use in the form of compact discs), optical video discs, optical cards, etc.
第３図は、従来の製造方法により作成された例えば光学
式ディスクの構成例を模式的に示す断面図である。すな
わち、射出成型等によって基材１を作成し、この基材１
の上に蒸若、スパッタリング等の方法で、金属膜層２を
設ける。さらに、この金属膜層２の上に保護コート層３
を塗布し、その上にレーベル印刷４を施している。なお
、５はディスクの中心穴、６は情報ピット等の信号面を
それぞれ示すものである。FIG. 3 is a cross-sectional view schematically showing an example of the configuration of, for example, an optical disc manufactured by a conventional manufacturing method. That is, a base material 1 is created by injection molding or the like, and this base material 1 is
A metal film layer 2 is provided thereon by a method such as vapor deposition or sputtering. Furthermore, a protective coat layer 3 is provided on this metal film layer 2.
is applied, and label printing 4 is applied thereon. Note that 5 indicates the center hole of the disk, and 6 indicates the signal surface such as information pits.
［発明が解決しようとする課題］
ところで、従来の光学式ディスクは、上述のようにディ
スク−枚−枚を射出成型等により成型し、さらにその−
枚一枚に蒸着、保護コート、印刷等を施さなければなら
ない。このため、高価な生産設備が必要であり、製品価
格が高い。また、ディスクの生産性が低く、量産には向
かない。すなわち、ある程度の量産性は期待できるもの
の限界があり、特に雑誌、書籍等の出版物程度の規模の
大量生産には向いておらず、材料費、設備償却費が高く
なる。[Problems to be Solved by the Invention] By the way, conventional optical discs are manufactured by molding discs by injection molding or the like as described above.
Each sheet must be subjected to vapor deposition, protective coating, printing, etc. Therefore, expensive production equipment is required and the product price is high. In addition, the productivity of the disk is low, making it unsuitable for mass production. That is, although a certain degree of mass production can be expected, there is a limit, and it is not particularly suitable for mass production on the scale of publications such as magazines and books, and material costs and equipment depreciation costs are high.
本発明は上述のような問題を解決するために成されたも
ので、材料費を著しく低減し極めて安価で生産性の高い
光学式記録媒体を提供することを目的とする。The present invention was made to solve the above-mentioned problems, and an object of the present invention is to significantly reduce material costs and provide an extremely inexpensive optical recording medium with high productivity.
［課題を解決するための手段コ
上記の目的を達成するために本発明では、透光性の材料
からなる第１の基板の一方の面に信号記録層を設け、当
該節１の基板の他方の面側から信号を読出すようにした
読出し専用の光学式記録媒体において、第１の基板の信
号読出し面側に。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a signal recording layer on one side of a first substrate made of a translucent material, and In a read-only optical recording medium in which signals are read from the side of the first substrate, on the signal readout side of the first substrate.
透光性の材料からなる第２の基板を設け、第１および第
２の各基板を通して信号を読出すようにしている。A second substrate made of a transparent material is provided, and signals are read out through each of the first and second substrates.
［作用］
従って、本発明の光学式記録媒体では、第１の基板と第
２の基板としてそれぞれ別々の材質を選択して各々最適
な材質の材料を選択できることにより、従来の射出成型
等で作成された記録媒体に比べて、生産性の向上ならび
に低価格化を図ることが可能となる。[Function] Therefore, in the optical recording medium of the present invention, different materials can be selected for the first substrate and the second substrate, and the optimal material for each can be selected, so that it can be produced by conventional injection molding etc. Compared to conventional recording media, it is possible to improve productivity and lower prices.
［実施例］
以下、本発明の一実施例について図面を参照して詳細に
説明する。[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図は、本発明を光学式ディスクに適用した場合の構
成例を模式的に示す断面図である。第１図において、透
光性の材料からなる第１の基板８の一方の面には、情報
ピット等の信号面９を形成している。また、この信号面
９の上には、蒸着。FIG. 1 is a sectional view schematically showing a configuration example when the present invention is applied to an optical disc. In FIG. 1, a signal surface 9 such as information pits is formed on one surface of a first substrate 8 made of a transparent material. Further, on this signal surface 9, vapor deposition is performed.
スパッタリング等の方法で、金属膜層１０を設けている
。さらに、この金属膜層１０の上には保護コート層１１
を塗布し、その上にレーベル印刷１２を施している。一
方、第１の基板８の信号面９と反対側の面、すなわち信
゛号読出し面側には、スペーサ１３を介して透光性の材
料からなる第２の基板１４を設けている。そして、第１
の基板８と第２の基板１４との間に空気層１５を設けて
、第１および第２の各基板８．１４を通して信号を読出
すようにしている。なお、１６はディスクの中心穴を示
すものである。A metal film layer 10 is provided by a method such as sputtering. Furthermore, a protective coating layer 11 is provided on this metal film layer 10.
is coated, and label printing 12 is applied thereon. On the other hand, on the surface of the first substrate 8 opposite to the signal surface 9, that is, on the signal readout surface side, a second substrate 14 made of a light-transmitting material is provided with a spacer 13 interposed therebetween. And the first
An air layer 15 is provided between the substrate 8 and the second substrate 14 so that signals can be read out through each of the first and second substrates 8.14. Note that 16 indicates the center hole of the disk.
ここで、第１の基板８の材質としては、一般にプラスチ
ックシートまたはその積層品を用いる。Here, as the material of the first substrate 8, a plastic sheet or a laminate thereof is generally used.
例えば、例えばポリアミド、ポリエステル、ポリカーボ
ネート、ポリメチルメタクリレート、メチルペルテン樹
脂、アイオノマー樹脂、ポリエーテルスルホン、塩化ビ
ニル、ポリスチレン、セルロース系樹脂等またはその積
層品を用い、必要に応じて信号形成層として、ポリウレ
タン樹脂、セルロース系樹脂、アクリル系樹脂等を塗布
（図では省略している）したものを用いてもよい。すな
わち、この第１の基板８の材質、構成は、信号形成の方
法によって選択されるものである。また、金属膜層１０
は、反射を目的として設けられるものである。さらに、
保護コート層１１の材質は特に限定されるものではない
が、金属膜層１０を腐蝕したすせず、信号の読出しに悪
影響を与えないものであることは言うまでもなく、一般
的にはアクリル系の紫外線硬化樹脂を用いる。For example, polyamide, polyester, polycarbonate, polymethyl methacrylate, methyl pertene resin, ionomer resin, polyether sulfone, vinyl chloride, polystyrene, cellulose resin, etc. or a laminate thereof may be used, and if necessary, polyurethane may be used as a signal forming layer. A material coated with resin, cellulose resin, acrylic resin, etc. (not shown in the figure) may also be used. That is, the material and configuration of the first substrate 8 are selected depending on the method of signal formation. In addition, the metal film layer 10
is provided for the purpose of reflection. moreover,
The material of the protective coat layer 11 is not particularly limited, but it goes without saying that it does not corrode the metal film layer 10 and does not adversely affect signal readout, and is generally made of acrylic material. Uses ultraviolet curing resin.
一方、スペーサ１３の材質は特に限定されず、一般的に
はプラスチック、金属等を用いる。また、第２の基板１
４の材質、構成は、第１の基板８と同様な材質の中から
選択するが、基本的には第１の基板８が信号形成の方法
によって選択しているのに対し、第２の基板１４の材質
、構成は、主として信号面保護の観点から選択するため
、例えば第１の基板８に比べてプラスチック強度等の高
いものを選択することが好ましい。この場合、第１の基
板８および第２の基板１４ともに、複屈折が小さく信号
の読出しに支障のないものを用いることは当然である。On the other hand, the material of the spacer 13 is not particularly limited, and plastic, metal, etc. are generally used. In addition, the second substrate 1
The material and configuration of the second substrate 4 are selected from among the same materials as the first substrate 8, but basically the first substrate 8 is selected depending on the method of signal formation, whereas the second substrate Since the material and structure of the substrate 14 are selected mainly from the viewpoint of protecting the signal surface, it is preferable to select a material having higher plastic strength than that of the first substrate 8, for example. In this case, it goes without saying that both the first substrate 8 and the second substrate 14 should have low birefringence and do not interfere with signal reading.
以上から、第２の基板】４の材質としては、例えば塩化
ビニル樹脂、ポリアミド。From the above, the material of the second substrate [4] may be, for example, vinyl chloride resin or polyamide.
ポリエステル、ポリカーボネート、ポリメチルメタクリ
レート、メチルペルテン樹脂、アイオノマー樹脂、ポリ
エーテルスルホン、ポリフェニレンスルフィド樹脂等が
挙げられる。さらに、第１の基板８．スペーサ１３．お
よび第２の基板１４の王者を結合する方法としては、熱
シール、溶断シール等のシールにより熱圧着する方法や
、グルーホットメイト、紫外線硬化樹脂あるいは通常の
溶剤型接着剤等の接着剤を塗布して接着する方法等を適
宜選択する。なお、本光学式ディスクの全体の厚さは通
常１，２關とし、例えば第１の基板８の厚さを０．３〜
０．４＋ｎｍ、スペーサ１３すなわち空気層１５の厚さ
を０ 、 ５〜０ 、６ ｍｍ 、第２の基板１４の厚
さを０．２〜０．４ｍ＋＋＋とする。Examples include polyester, polycarbonate, polymethyl methacrylate, methyl pertene resin, ionomer resin, polyether sulfone, polyphenylene sulfide resin, and the like. Furthermore, the first substrate 8. Spacer 13. The second substrate 14 can be bonded by thermocompression using a seal such as heat sealing or fusing seal, or by applying an adhesive such as glue hot mate, ultraviolet curing resin, or ordinary solvent-based adhesive. Select the method of adhesion, etc. as appropriate. Note that the overall thickness of this optical disc is usually 1 or 2 inches, and for example, the thickness of the first substrate 8 is 0.3 to 2.
The thickness of the spacer 13, that is, the air layer 15 is 0.5 to 0.6 mm, and the thickness of the second substrate 14 is 0.2 to 0.4 m+++.
かかる構成の光学式ディスクにおいては、透光性の材料
からなる第１の基板８および第２の基板１４からディス
クの基板を構成していることから、第１の基板８と第２
の基板１４としてそれぞれ別々の制質を選択して各々最
適な材質の材料を選択できるため、従来の射出成型等で
作成されたディスクに比べて、ディスクの生産性が高く
、量産に向いている。また、生産設備が安価であり、製
品価格が安くなる。さらに、第１の基板８と第２の基板
１４との間に空気層１５を設けているため、その分だけ
第２の基板１４の厚さを薄くすることができ、材料費を
著しく安くすることができる。In an optical disc having such a configuration, since the disc substrate is composed of the first substrate 8 and the second substrate 14 made of a transparent material, the first substrate 8 and the second substrate 14 are made of a transparent material.
Since the optimum material can be selected for each of the substrates 14 by selecting different qualities, the productivity of the disk is higher than that of disks made by conventional injection molding, etc., making it suitable for mass production. . In addition, production equipment is inexpensive and product prices are low. Furthermore, since the air layer 15 is provided between the first substrate 8 and the second substrate 14, the thickness of the second substrate 14 can be reduced by that much, which significantly reduces the material cost. be able to.
さらにまた、第１の基板８として薄いフィルムを使用で
きるため、巻取による多量生産が可能となる。Furthermore, since a thin film can be used as the first substrate 8, mass production by winding is possible.
上述したように、本実施例の光学式ディスクは、透光性
の材料からなる第１の基板８の一方の面に金属膜層１０
を設け、この第１の基板８の他方の面側から信号を読出
すようにした読出し専用の光学式ディスクにおいて、第
１の基板８の信号読出し面側に、スペーサ１３を介して
空気層１５を形成しつつ透光性の材料からなる第２の基
板１４を設け、第１および第２の各基板８．１４を通し
て信号を読出すようにしたので、材料費を著しく低減し
、極めて安価で生産性の高い小形のディスクに最適な光
学式ディスクとすることができる。As described above, the optical disc of this embodiment has a metal film layer 10 on one surface of the first substrate 8 made of a transparent material.
In a read-only optical disc in which signals are read from the other side of the first substrate 8, an air layer 15 is provided on the signal readout side of the first substrate 8 via a spacer 13. Since the second substrate 14 made of a light-transmitting material is provided while forming a transparent material, and signals are read out through each of the first and second substrates 8.14, the material cost is significantly reduced and the device is extremely inexpensive. The optical disc can be made optimal for small-sized discs with high productivity.
尚、本発明は」二連した実施例に限定されるものではな
く、次のようにしても同様に実施することができるもの
である。It should be noted that the present invention is not limited to the two consecutive embodiments, but can be implemented in the same manner as follows.
例えば、第１の基板８への信号形成を巻取にて形成しよ
うとする場合、基板としては厚さの薄いものを用いる方
が便利であり、このような場合にはポリエステル樹脂フ
ィルム等を用いることができ、また第２の基板１４とし
ては、ポリカーボネート樹脂またはアクリル樹脂等を用
いて複屈折を抑える。For example, when forming a signal on the first substrate 8 by winding, it is more convenient to use a thin substrate, and in such a case, a polyester resin film or the like is used. In addition, as the second substrate 14, polycarbonate resin, acrylic resin, or the like is used to suppress birefringence.
第３図は、第２の基板１７を成型により作成して、第１
図の実施例におけるスペーサ１３を省略した場合の断面
構成例を示す図であり、第１図と同一部分には同一符号
を付してその説明を省略している。この場合、第２の基
板１４の成型方法としては、真空成型、射出成型、射出
圧縮成型等のいずれを用いてもよく特に限定されるもの
ではないが、複屈折が強くならないようにすればよい。FIG. 3 shows that the second substrate 17 is made by molding and the first substrate 17 is made by molding.
It is a diagram showing an example of a cross-sectional configuration when the spacer 13 in the embodiment shown in the figure is omitted, and the same parts as in FIG. In this case, the method for molding the second substrate 14 may be vacuum molding, injection molding, injection compression molding, etc., and is not particularly limited, as long as the birefringence does not become strong. .
一方、上記実施例では本発明を光学式ディスクに適用し
た場合について述べたが、これに限らず光学方式のビデ
オディスク、光カード等のその他の光学式記録媒体につ
いても、同様に本発明を適用できるものである。On the other hand, although the above embodiment describes the case where the present invention is applied to an optical disc, the present invention is not limited to this and can be similarly applied to other optical recording media such as optical video discs and optical cards. It is possible.
［発明の効果］
以上説明したように本発明によれば、透光性の材料から
なる第１の基板の一方の面に信号記録層を設け、この第
１の基板の他方の面側から信号を読出すようにした読出
し専用の光学式ディスクにおいて、第１の基板の信号読
出し面側に、透光性の材料からなる第２の基板を設け、
第１および第２の各基板を通して信号を読出すようにし
たので、材料費を著しく低減し極めて安価で生産性の高
い小形のディスクに最適な光学式ディスクが提供できる
。[Effects of the Invention] As explained above, according to the present invention, a signal recording layer is provided on one side of a first substrate made of a transparent material, and a signal is recorded from the other side of the first substrate. In a read-only optical disc for reading out, a second substrate made of a translucent material is provided on the signal reading surface side of the first substrate,
Since the signal is read out through each of the first and second substrates, it is possible to significantly reduce material costs and provide an optical disc that is extremely inexpensive, highly productive, and ideal for small-sized discs.
第１図は本発明を光学式ディスクに適用した場合の一実
施例を示す断面図、第２図は本発明の他の実施例を示す
断面図、第３図は従来の光学式ディスクの一例を示す断
面図である。
８・・・第１の基板、９・・・信号面、１０・・・金属
膜層、１１・・・保護コート層、１２・・・レーベル印
刷、１３・・・スペーサ、１４・・・第２の基板、１５
・・・空気層、１６・・・ディスクの中心穴、１７・・
・第２の基板。
出願人代理人 弁理士 鈴江武彦
図
図
図Fig. 1 is a sectional view showing an embodiment of the present invention applied to an optical disc, Fig. 2 is a sectional view showing another embodiment of the invention, and Fig. 3 is an example of a conventional optical disc. FIG. 8... First substrate, 9... Signal surface, 10... Metal film layer, 11... Protective coat layer, 12... Label printing, 13... Spacer, 14... No. 2 substrates, 15
...air layer, 16...center hole of disk, 17...
-Second board. Applicant's agent Patent attorney Takehiko Suzue
Claims (7)
号記録層を設け、当該第１の基板の他方の面側から信号
を読出すようにした読出し専用の光学式記録媒体におい
て、 前記第１の基板の信号読出し面側に、透光性の材料から
なる第２の基板を設け、 前記第１および第２の各基板を通して信号を読出すよう
にした ことを特徴とする光学式記録媒体。(1) A read-only optical recording medium in which a signal recording layer is provided on one side of a first substrate made of a transparent material, and signals are read out from the other side of the first substrate. A second substrate made of a translucent material is provided on the signal reading surface side of the first substrate, and signals are read out through each of the first and second substrates. Optical recording medium.
ることを特徴とする請求項（１）項記載の光学式記録媒
体。(2) The optical recording medium according to claim (1), wherein the first substrate and the second substrate are made of the same kind of material.
ることを特徴とする請求項（１）項記載の光学式記録媒
体。(3) The optical recording medium according to claim (1), wherein the first substrate and the second substrate are made of different materials.
けたことを特徴とする請求項（１）項記載の光学式記録
媒体。(4) The optical recording medium according to claim (1), characterized in that an air layer is provided between the first substrate and the second substrate.
射出圧縮成型等による成型品から成ることを特徴とする
請求項（１）項記載の光学式記録媒体。(5) The optical recording medium according to claim (1), wherein the second substrate is formed by vacuum molding, injection molding, injection compression molding, or the like.
リエステル樹脂から成り、第２の基板はポリカーボネー
ト樹脂またはアクリル樹脂から成ることを特徴とする請
求項（１）項記載の光学式記録媒体。(6) The optical recording medium according to claim (1), wherein the first substrate is made of polyester resin coated with polyurethane resin, and the second substrate is made of polycarbonate resin or acrylic resin.
坦部と側壁部とから成ることを特徴とする請求項（１）
項または（５）項記載の光学式記録媒体。(7) Claim (1), wherein the second substrate comprises a flat portion and a side wall portion that are continuously integrally molded.
The optical recording medium according to item or item (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63321136A JP2701396B2 (en) | 1988-12-20 | 1988-12-20 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63321136A JP2701396B2 (en) | 1988-12-20 | 1988-12-20 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02166641A true JPH02166641A (en) | 1990-06-27 |
| JP2701396B2 JP2701396B2 (en) | 1998-01-21 |
Family
ID=18129206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63321136A Expired - Fee Related JP2701396B2 (en) | 1988-12-20 | 1988-12-20 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2701396B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100627106B1 (en) * | 1998-04-10 | 2007-12-04 | 엘지전자 주식회사 | Optical Recording Media And Methods For Fabricating The Same |
| CN100449616C (en) * | 1999-02-12 | 2009-01-07 | 通用电气公司 | Data storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60242531A (en) * | 1984-05-16 | 1985-12-02 | Tdk Corp | Substrate for optical information recording medium |
| JPH02122443A (en) * | 1988-11-01 | 1990-05-10 | Canon Inc | Substrate for optical recording medium |
-
1988
- 1988-12-20 JP JP63321136A patent/JP2701396B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60242531A (en) * | 1984-05-16 | 1985-12-02 | Tdk Corp | Substrate for optical information recording medium |
| JPH02122443A (en) * | 1988-11-01 | 1990-05-10 | Canon Inc | Substrate for optical recording medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100627106B1 (en) * | 1998-04-10 | 2007-12-04 | 엘지전자 주식회사 | Optical Recording Media And Methods For Fabricating The Same |
| CN100449616C (en) * | 1999-02-12 | 2009-01-07 | 通用电气公司 | Data storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2701396B2 (en) | 1998-01-21 |
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