JPH0114878B2 - - Google Patents
Info
- Publication number
- JPH0114878B2 JPH0114878B2 JP11195482A JP11195482A JPH0114878B2 JP H0114878 B2 JPH0114878 B2 JP H0114878B2 JP 11195482 A JP11195482 A JP 11195482A JP 11195482 A JP11195482 A JP 11195482A JP H0114878 B2 JPH0114878 B2 JP H0114878B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- layer
- laser light
- conductive layer
- laser beam
- 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
- 239000010410 layer Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 17
- 239000000758 substrate Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000013047 polymeric layer Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 15
- 230000035945 sensitivity Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25708—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 13 elements (B, Al, Ga)
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25715—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing oxygen
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
- G11B7/2535—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polyesters, e.g. PET, PETG or PEN
Description
【発明の詳細な説明】 この発明は光記録媒体に関する。[Detailed description of the invention] This invention relates to optical recording media.
レーザ光を使つて情報の書き込みや、記録され
た情報の読み出しに使用される光記録媒体は主と
して光デイスクの分野で半導体レーザとそれに合
う記録材料の出現により画期的な進展を逐げてい
るが、記録材料にまだ問題が多くて磁気デイスク
や磁気テープと十分に競合できる段階には致つて
いないのが現状である。 Optical recording media, which are used to write information using laser light and read recorded information, have made revolutionary progress, mainly in the field of optical disks, with the advent of semiconductor lasers and compatible recording materials. However, there are still many problems with the recording material, and at present it has not reached the stage where it can fully compete with magnetic disks and magnetic tape.
光記録媒体の光デイスクのうち、現在特に実用
化が活発なのは追加記録が可能なものであり、こ
れの記録材料は高感度である、熱伝導率が低い、
光吸収係数が大である、低融点、低沸点である等
の条件を総合的に満すものとしてTe系の金属薄
膜が多く、情報の記録にはこの金属薄膜にレーザ
光で孔を開けたり黒化させたりして行われてい
る。尚、Te系以外の追加記録可能な記録材料に
はIn等の低融点金属や色素薄膜材料、銀有機フイ
ルムなどがあるが、これらは長期安定性や耐薬品
性に問題が多くて末だ研究域を脱しきれていな
い。 Among optical discs, which are optical recording media, the ones that are currently being put into practical use are those that allow additional recording, and the recording materials for these are highly sensitive, have low thermal conductivity,
There are many Te-based metal thin films that comprehensively satisfy conditions such as a large light absorption coefficient, low melting point, and low boiling point, and to record information, holes must be made in this metal thin film with a laser beam. It is done by blackening it. Recording materials other than Te-based that can be used for additional recording include low melting point metals such as In, dye thin film materials, and silver organic films, but these have many problems with long-term stability and chemical resistance, and research on these materials has been limited. I haven't been able to get out of this zone.
ところで、Te系記録材料を使用した光記録媒
体への情報の書き込みはレーザ光の熱エネルギー
を利用して行うため、非接触の記録が可能、レー
ザ光スポツトの極小化により高密度記録が可能な
反面、次の各問題点が生起されている。 By the way, since information is written on optical recording media using Te-based recording materials using the thermal energy of laser light, non-contact recording is possible, and high-density recording is possible by minimizing the laser light spot. On the other hand, the following problems have arisen.
(a) 記録時のレーザ光は記録層に孔を開けたり黒
化させたりするだけの熱エネルギーが必要なた
め、大容量のレーザ光源を必要とする。(a) The laser light used during recording requires enough thermal energy to create holes in the recording layer and blacken it, so a large-capacity laser light source is required.
(b) レーザ光源のパワーに限度があり、これを補
うため記録材料の感度を向上させる努力がなさ
れているが、高感度になる程高価となり、実用
化が難しい。(b) There is a limit to the power of the laser light source, and efforts are being made to improve the sensitivity of recording materials to compensate for this, but the higher the sensitivity, the more expensive it becomes, making it difficult to put it into practical use.
(c) 記録材料に高感度のものを使用して記録用レ
ーザ光のパワーを小ならしめることが可能だ
が、高感度の記録材料は再生時のレーザ光で反
応する恐れがあり、また悪くすると保存中に記
録データが消失、変化することがある。(c) It is possible to reduce the power of the recording laser beam by using a highly sensitive recording material, but there is a risk that the highly sensitive recording material will react with the laser beam during playback, and in worse cases Recorded data may be lost or changed during storage.
(d) レーザ光のパワーとの関係上、高速度記録が
困難である。(d) High-speed recording is difficult due to the power of the laser beam.
要するに従来はレーザ光の熱エネルギーのみで
記録する光記録媒体の域を出ず、そのため上記問
題を含み、適当なものが末だ開発されず、数々の
利点を有しながらも磁気デイスクや磁気テープと
競合できないでいる。 In short, conventional optical recording media have been limited to recording using only the thermal energy of laser light, and as a result, they have the above-mentioned problems, and suitable media have not yet been developed, and although they have many advantages, magnetic disks and magnetic tapes I can't compete with that.
本発明はかかる光記録媒体の問題点に鑑みてな
されたもので、情報の書き込みに放電エネルギー
とレーザ光の熱エネルギーが利用できる画期的な
光記録媒体を開発し提供する。 The present invention has been made in view of the problems of such optical recording media, and aims to develop and provide an epoch-making optical recording medium in which discharge energy and thermal energy of laser light can be used to write information.
本発明の特徴は光導電体と記録体の重合層或は
混合層を有することで、情報の書き込みは前記重
合層或は混合層の全体に厚み方向から耐圧値以下
の適当な電圧を印加し、レーザ光を照射すること
で実行される。この記録はレーザ光照射部分だけ
が局部的にインピーダンス低下を起すことで発生
する放電のエネルギーとレーザ光を照射による熱
エネルギーの両者で行われる。また記録時のレー
ザ光照射はトリガ的な作用のみ行うようされ、記
録に使われるエネルギーは主として放電エネルギ
ーであり、レーザ光の熱エネルギーは補助的なも
のである。このことにより、記録時のレーザ光は
小パワーなもので十分であり、また記録材料の光
感度は無視でき、これにより上記従来問題点が全
て解消される。 A feature of the present invention is that it has a polymer layer or a mixed layer of a photoconductor and a recording material, and information is written by applying an appropriate voltage below the withstand voltage from the thickness direction to the entire polymer layer or mixed layer. , is performed by irradiating with laser light. This recording is performed using both the energy of discharge generated by locally reducing the impedance of only the portion irradiated with the laser beam, and the thermal energy generated by irradiating the laser beam. Further, the laser beam irradiation during recording is designed to perform only a triggering action, and the energy used for recording is mainly discharge energy, and the thermal energy of the laser beam is auxiliary. As a result, it is sufficient to use a low-power laser beam during recording, and the photosensitivity of the recording material can be ignored, thereby solving all of the above-mentioned conventional problems.
以下本発明の具体的構造例を図面の各実施例と
共に詳述する。 Hereinafter, specific structural examples of the present invention will be explained in detail together with the respective embodiments shown in the drawings.
第１図の第１実施例において、１はポリエステ
ル等の基板、２は基板１上にアルミニウム蒸着等
の手段で被着した導電層、３及び４は導電層２上
に積層した本発明の特徴とする光導電層と透明な
記録層である。光導電層３は光が当ると内部イン
ピーダンスが低下するもので、例えば安価で特性
的に安定である理由で酸化亜鉛の微粒子（0.1μｍ
以下）を樹脂に混ぜたものを導電層２上に薄く塗
布して形成される。記録層４は局部的な電流の放
電現象で孔が開くもの、或は黒化するものなど、
いわゆる情報ピツトが形成される誘電体で、例え
ば透光性のポリエステルで形成される。また第１
図の５は記録層４上に被着した透明導電層で、例
えば酸化インジウムで形成される。 In the first embodiment shown in FIG. 1, 1 is a substrate made of polyester or the like, 2 is a conductive layer deposited on the substrate 1 by means such as aluminum vapor deposition, and 3 and 4 are laminated on the conductive layer 2. Characteristics of the present invention A photoconductive layer and a transparent recording layer. The internal impedance of the photoconductive layer 3 decreases when exposed to light. For example, fine particles of zinc oxide (0.1 μm) are used because they are inexpensive and have stable characteristics.
The conductive layer 2 is formed by thinly applying a mixture of the following) to a resin. The recording layer 4 may have holes that open or become black due to local current discharge phenomena.
A dielectric material on which so-called information pits are formed, and is made of, for example, transparent polyester. Also the first
5 in the figure is a transparent conductive layer deposited on the recording layer 4, and is made of, for example, indium oxide.
上記光記録媒体ａは円板状の光デイスク或はテ
ープ状の光テープなどとして用いられる。これの
情報の書き込みは第２図に示す要領で行われる。
先ず上下の各導電層２，５に直流電圧Ｖを印加す
る。この電圧Ｖは両導電層２，５間の耐圧値より
小さく、後述動作を起す大きさ（約50〜100V）
に設定される。而して、透明導電層５の上方より
所望の箇所にレーザ光６を照射する。いま透明導
電層５上の一点P1にレーザ光６が照射されたと
すると、レーザ光６は透明記録層４を透過して光
導電層３の点P3（点P1の下方）に入射する。する
と点P3における光導電層３のインピーダンスが
局部的に低下して、点P3に電圧Ｖが集中的に加
わり、これによつて点P3と点P1間にある記録層
４の点P2でブレークダウン現象が生じて点P2に
電流が集中的に流れ、この時の放電エネルギーと
点P2に入射しているレーザ光６の熱エネルギー
でもつて点P2の記録層４が局部的に加熱され、
この加熱によつて例えば点P2の記録層４とその
上の透明導電層５が溶融して孔が開き、ビツト７
が形成される。ビツト形成に要するエネルギーは
放電エネルギーが主であり、レーザ光６はビツト
形成予定部分に電流を集中させるためのトリガ信
号として用いられ、従つて記録時のレーザ光源は
再生時のレーザ光源と同程度の小パワーのものが
使用され、従来のような大パワーのものは不必要
である。 The optical recording medium a is used as a disc-shaped optical disk or a tape-shaped optical tape. This information is written in the manner shown in FIG.
First, a DC voltage V is applied to each of the upper and lower conductive layers 2 and 5. This voltage V is smaller than the withstand voltage value between both conductive layers 2 and 5, and is large enough to cause the operation described below (approximately 50 to 100 V).
is set to Then, laser light 6 is irradiated onto a desired location from above the transparent conductive layer 5. Assuming that one point P 1 on the transparent conductive layer 5 is irradiated with the laser beam 6, the laser beam 6 passes through the transparent recording layer 4 and enters the photoconductive layer 3 at a point P 3 (below the point P 1 ). . Then, the impedance of the photoconductive layer 3 at the point P3 locally decreases, and the voltage V is intensively applied to the point P3 . A breakdown phenomenon occurs at P2 , and current flows intensively to point P2 , and the recording layer 4 at point P2 is damaged by the discharge energy at this time and the thermal energy of the laser beam 6 that is incident on point P2 . locally heated,
By this heating, for example, the recording layer 4 at point P2 and the transparent conductive layer 5 thereon are melted and a hole is opened, and the bit 7
is formed. The energy required to form a bit is mainly discharge energy, and the laser beam 6 is used as a trigger signal to concentrate the current in the area where the bit is to be formed.Therefore, the laser light source during recording is of the same level as the laser light source during playback. A low power type is used, and a conventional high power type is unnecessary.
第３図の第２実施例における光記録媒体ｂはポ
リエステル等の透明基板１′の下面に第１実施例
と同じ透明導電層５、透明記録層４、光導電層
３、導電層２を積層したもので、記録の動作原理
は同じである。この場合は基板１′が保護膜とし
て利用される。またビツト形成は黒化現象を利用
して行うことが望ましい。 In the optical recording medium b in the second embodiment shown in FIG. 3, the same transparent conductive layer 5, transparent recording layer 4, photoconductive layer 3, and conductive layer 2 as in the first embodiment are laminated on the lower surface of a transparent substrate 1' made of polyester or the like. The operating principle of recording is the same. In this case, the substrate 1' is used as a protective film. Further, it is desirable to form bits by utilizing a blackening phenomenon.
第４図の第３実施例は上記実施例における光導
電層３と記録層４を分けずにこの両層を構成する
光導電体と記録体を混合させて一層化した混合層
８を有する光記録媒体ｃを示す。尚、第４図の９
は基板、１０は基板９上に形成した導電層で、こ
の上に前記混合層８が形成される。１１は混合層
８上に形成した透明導電層である。この場合の記
録動作原理も第１実施例の場合と同じである。 The third embodiment shown in FIG. 4 is an optical system having a mixed layer 8 in which the photoconductive layer 3 and the recording layer 4 in the above embodiment are not separated, but the photoconductive material and the recording material constituting these two layers are mixed and made into a single layer. Recording medium c is shown. In addition, 9 in Figure 4
1 is a substrate, and 10 is a conductive layer formed on the substrate 9, on which the mixed layer 8 is formed. 11 is a transparent conductive layer formed on the mixed layer 8. The recording operation principle in this case is also the same as in the first embodiment.
以上のように、本発明によれば記録用レーザ光
源の小パワー化が実現でき、また記録は主として
放電エネルギーで行うため記録材料に安価なもの
の採用が可能であり、従来のように高感度で高価
なものの使用や高感度ゆえのデータ消失、変化等
の問題が難なく解決され、これにより記録の高速
化も容易に実現でき、磁気デイスクや磁気テープ
と十分に競合できる光記録媒体が提供できる。 As described above, according to the present invention, it is possible to reduce the power of the laser light source for recording, and since recording is mainly performed using discharge energy, it is possible to use inexpensive recording materials, and it is possible to achieve high sensitivity and Problems such as data loss and data change due to the use of expensive materials and high sensitivity can be easily solved, and as a result, high-speed recording can be easily realized, and an optical recording medium that can fully compete with magnetic disks and magnetic tapes can be provided.
第１図及び第２図は本発明の一実施例を示す部
分断面図及び記録動作時の部分断面図、第３図及
び第４図は本発明の他の各実施例を示す部分断面
図である。
３……光導電体（層）、４……記録体（層）、６
……レーザ光、８……混合層。
1 and 2 are partial cross-sectional views showing one embodiment of the present invention and a partial cross-sectional view during recording operation, and FIGS. 3 and 4 are partial cross-sectional views showing other embodiments of the present invention. be. 3... Photoconductor (layer), 4... Recording body (layer), 6
...Laser light, 8...Mixed layer.
Claims (1)
電層との間に、光導電体と記録体の重合層或は混
合層を設け、前記第１と第２の導電層間に電圧を
印加すると共にレーザ光の局部的照射にて、光照
射部分における、前記重合層或は混合層のインピ
ーダンス低下による放電エネルギーと光エネルギ
ーを利用して情報の書き込みを行なうことを特徴
とする光記録媒体。1. A polymeric layer or a mixed layer of a photoconductor and a recording material is provided between the first conductive layer and the optically transparent second conductive layer on the substrate, and A light source characterized in that information is written by applying a voltage and locally irradiating laser light, using discharge energy and light energy caused by a decrease in impedance of the polymerized layer or mixed layer in the light irradiated area. recoding media.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57111954A JPS591298A (en) | 1982-06-28 | 1982-06-28 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57111954A JPS591298A (en) | 1982-06-28 | 1982-06-28 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS591298A JPS591298A (en) | 1984-01-06 |
| JPH0114878B2 true JPH0114878B2 (en) | 1989-03-14 |
Family
ID=14574316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57111954A Granted JPS591298A (en) | 1982-06-28 | 1982-06-28 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591298A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338588A (en) * | 1986-08-01 | 1988-02-19 | Seiken Kagaku Kk | Alkaline peeling liquid |
| US5229169A (en) * | 1992-01-21 | 1993-07-20 | General Electric Company | Adhesion of electroless coatings to resinous articles by treatment with permanganate |
-
1982
- 1982-06-28 JP JP57111954A patent/JPS591298A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS591298A (en) | 1984-01-06 |
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