JPH07102738B2 - Thermal recording - Google Patents
Thermal recordingInfo
- Publication number
- JPH07102738B2 JPH07102738B2 JP60075278A JP7527885A JPH07102738B2 JP H07102738 B2 JPH07102738 B2 JP H07102738B2 JP 60075278 A JP60075278 A JP 60075278A JP 7527885 A JP7527885 A JP 7527885A JP H07102738 B2 JPH07102738 B2 JP H07102738B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- recording
- compressed
- polymer resin
- polymer
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は感熱記録体に係り、特に記録，消去が可能であ
る事が要求される情報記録装置に用いられる。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a thermosensitive recording medium, and is particularly used for an information recording apparatus required to be recordable and erasable.
従来、この種の装置としては記録再生型の光ディスクメ
モリがあり、主としてTe,Te−Se−As,Al,Ti,Au,Rh等の
記録材料をディスク基板上に単層あるいは多層の膜とし
て形成し、この膜に10〜100mWのレーザー光を照射し、
通常ピットと呼ばれる小孔を形成し、ピットの有無によ
り情報を記録する。このピットの形で記録された情報を
読み出すには、前述のレーザー光よりもパワーを下げた
数mWのレーザー光の反射光強度の変化又はレーザー光の
透過光強度の変化を読み出し、これをI/O信号として記
録情報を出力している。ところが、この光ディスクメモ
リはレーザー光により記録層に凹状の穴を形成する為、
一度記録した情報を消去する事ができないと言う欠点を
有している。かつ記録材料の作成には、蒸着等の方法を
用いる為コストが高くなると言う欠点も有している。記
録，再生，消去可能な光ディスクメモリとしては光磁気
メモリ等が研究されているが、コスト等の面から問題を
残している。Conventionally, there is a recording / reproducing optical disk memory as this type of device, and mainly recording materials such as Te, Te-Se-As, Al, Ti, Au, and Rh are formed on the disk substrate as a single-layer or multi-layer film. Then, irradiate this film with laser light of 10 to 100 mW,
Usually, small holes called pits are formed, and information is recorded depending on the presence or absence of pits. To read the information recorded in the form of these pits, the change in the reflected light intensity of the laser light or the change in the transmitted light intensity of the laser light of several mW whose power is lower than that of the above-mentioned laser light is read, and this is read The recorded information is output as the / O signal. However, since this optical disk memory forms a concave hole in the recording layer by laser light,
It has a drawback that information once recorded cannot be erased. In addition, there is a drawback that the cost is high because a method such as vapor deposition is used for producing the recording material. A magneto-optical memory has been studied as an optical disk memory capable of recording, reproducing, and erasing, but it has a problem in terms of cost.
本発明の第１の目的は上記従来技術の問題点に鑑み、安
価で、記録密度が高く、低パワーな感熱記録体を提供す
る事にある。A first object of the present invention is to provide a thermal recording medium which is inexpensive, has a high recording density, and has a low power in view of the problems of the above-mentioned prior art.
本発明の第２の目的は上記従来技術の問題点に鑑み、安
価で、記録密度が高く、低パワーでかつ記録・消去が可
逆的にでき、繰返し再使用のできる感熱記録体を提供す
る事にある。A second object of the present invention is to provide a thermosensitive recording medium which is inexpensive, has high recording density, low power, reversible recording and erasing, and can be reused repeatedly in view of the above problems of the prior art. It is in.
上記本発明の第１の目的はフレーク状の高分子樹脂を圧
縮することによって形成された熱復元性を有する感熱記
録体であって、該感熱記録体を部分的に加熱して熱復元
させ、ドット状の山を形成することによって記録ができ
る様にした事を特徴とする本願の第１の発明の感熱記録
体によって達成される。The first object of the present invention is a heat-sensitive recording material having a heat-restoring property formed by compressing a flake-like polymer resin, wherein the heat-sensitive recording material is partially heated to be thermally restored, This is achieved by the heat-sensitive recording material of the first invention of the present application, which is characterized in that recording can be performed by forming dot-shaped ridges.
上記本発明の第２の目的はフレーク状の高分子樹脂を圧
縮することによって形成された熱復元性を有する圧縮体
と高分子樹脂体とを接合又は接着することによって形成
された感熱記録体であって、該感熱記録体を部分的に加
熱して圧縮体を熱復元させ、高分子樹脂体に食い込むよ
うにドット状の山を形成することによって記録がなさ
れ、前記ドット状の山によって圧縮された前記高分子樹
脂体の圧縮部を加熱し、該圧縮部を熱復元させることに
よって記録が消去できる様にした事を特徴とする本願の
第２の発明の感熱記録体によって達成される。A second object of the present invention is a heat-sensitive recording material formed by bonding or adhering a compressed resin body having heat recoverability formed by compressing a flake-shaped polymer resin and a polymer resin body. Therefore, recording is performed by partially heating the thermal recording medium to thermally restore the compressed body and forming dot-shaped peaks so as to bite into the polymer resin body, and compressed by the dot-shaped peaks. The heat-sensitive recording material according to the second invention of the present application is characterized in that the recording portion can be erased by heating the compression portion of the polymer resin body and thermally restoring the compression portion.
以下、本願の第１の発明の実施例を図面を用いて詳細に
説明する。なお本実施例では、光ディスク装置に用いら
れた感熱記録体について説明する。Embodiments of the first invention of the present application will be described below in detail with reference to the drawings. In the present embodiment, the thermal recording material used in the optical disk device will be described.
第１図は本願の第１の発明の感熱記録体の縦断面図であ
り、第２図は本願の第１の発明の感熱記録体の圧縮前の
高分子樹脂体の縦断面図である。FIG. 1 is a vertical cross-sectional view of a thermosensitive recording medium according to the first invention of the present application, and FIG. 2 is a vertical cross-sectional view of a polymer resin body before compression of the thermal recording medium according to the first invention of the present application.
まず感熱記録体の製造方法について述べる。本願の第１
の発明の感熱記録体で用いられる高分子樹脂体は例えば
ポリノルボルネン等分子量が300万程度のものが好まし
く、市販のポリノルボルネン（例えば商品名１−ソレッ
クス,CdF Chmie社製）をそのまま使用する事もできる。
本実施例ではポリノルボルネンを用いて説明を行う。通
常ポリノルボルネンは粒状のフレークであり、これを15
0℃に加熱し、かつ100〜150kg/cm2の圧力で厚みA0のデ
ィスク状に圧縮する。これが第２図に示した２の高分子
樹脂体である。この高分子樹脂体２は室温で任意の形に
変形でき、室温ではその形を保持している。変形された
高分子樹脂体２は40℃以上に加熱する事により元の形状
に復元する。また40℃を境にこれ以上の温度では樹脂の
弾性率が低下する性質を持っている。高分子樹脂体２を
さらに室温で厚みA1に圧縮して第１図に示した感熱記録
体である圧縮体１を作成する。この時の圧縮圧は前記高
分子樹脂体２の圧縮圧以上であればよいが、200kg/cm2
以上が望ましい。First, a method for manufacturing a thermal recording material will be described. First of this application
The polymer resin body used in the heat-sensitive recording material of the present invention preferably has a molecular weight of about 3,000,000 such as polynorbornene, and commercially available polynorbornene (eg, trade name 1-Solex, manufactured by CdF Chmie) should be used as it is. You can also
In this embodiment, polynorbornene is used for description. Usually polynorbornene is a granular flake, which is
It is heated to 0 ° C. and compressed into a disk having a thickness A 0 at a pressure of 100 to 150 kg / cm 2 . This is the polymer resin body 2 shown in FIG. The polymer resin body 2 can be deformed into an arbitrary shape at room temperature and retains the shape at room temperature. The deformed polymer resin body 2 is restored to its original shape by heating it to 40 ° C. or higher. It also has the property that the elastic modulus of the resin decreases at temperatures above 40 ° C. The polymer resin body 2 is further compressed to a thickness A 1 at room temperature to prepare the compressed body 1 which is the heat-sensitive recording body shown in FIG. The compression pressure at this time may be equal to or higher than the compression pressure of the polymer resin body 2, but 200 kg / cm 2
The above is desirable.
第５図は本願の第１の発明の感熱記録体を用いた記録方
法の模式図である。FIG. 5 is a schematic diagram of a recording method using the thermosensitive recording medium of the first invention of the present application.
まず、本願の第１の発明の感熱記録体の記録方法につい
て述べる。４はレーザーガンで、例えば半導体レーザー
である。ここから照射されるレーザー光は５のレンズで
平行光に変えられ、６のビームスプリッターを通ってレ
ンズ７で集光され、圧縮体１の表面に照射される。レー
ザー光で加熱された部分は高分子樹脂体２の状態に戻
り、記録が行われる。この時形成されるドット状の山は
与える熱エネルギーの大きさに比例し、十分な記録が行
われるレーザー光出力は100mW以下で十分である。また
読み取り再生時の精度にもよるが、レーザー光の出力を
下げれば記録ドットの径が小さくなり記録密度が増大す
る。First, the recording method of the thermosensitive recording medium of the first invention of the present application will be described. A laser gun 4 is, for example, a semiconductor laser. The laser light emitted from here is converted into parallel light by the lens 5, passes through the beam splitter 6 and is condensed by the lens 7, and is irradiated onto the surface of the compression body 1. The portion heated by the laser beam returns to the state of the polymer resin body 2 and recording is performed. The dot-shaped peaks formed at this time are proportional to the amount of thermal energy applied, and a laser light output of 100 mW or less is sufficient for sufficient recording. Further, depending on the accuracy at the time of reading and reproducing, if the output of the laser light is reduced, the diameter of the recording dot becomes smaller and the recording density increases.
圧縮体１は高分子樹脂製である為、良好な熱絶縁体であ
り記録ドットの間隔を細かく取る事が可能となる。例え
ば第３図に示すように従来のディスクと比較すると第３
図（ａ）に示した従来のディスク３においてはレーザー
光の照射された部分が溶けて小孔が形成されるために、
レーザー光の照射部分の回りも溶けて小孔が大きくなっ
てしまうが、第３図（ｂ）に示した本願の第１の発明の
感熱記録体である圧縮体１はほぼレーザー光の照射部分
のみが復元する。Since the compression body 1 is made of a polymer resin, it is a good heat insulator and the recording dots can be spaced finely. For example, as shown in FIG.
In the conventional disc 3 shown in FIG. 3A, the portion irradiated with the laser beam is melted to form a small hole.
Although the small holes become larger by melting around the laser light irradiation portion, the compression body 1 which is the thermal recording medium of the first invention of the present application shown in FIG. 3 (b) is almost the laser light irradiation portion. Only restored.
上記実施例において用いられたレーザー光の波長は、一
般的には赤外光を用いるが、吸収率の高い色素を高分子
樹脂中に分散させて高分子樹脂体２を形成すれば、任意
の波長のレーザー光が選択でき、より低出力のレーザー
による記録が可能となる。下表に使用される色素の具体
例を記載する。Infrared light is generally used as the wavelength of the laser light used in the above-mentioned examples, but if the dye having a high absorptivity is dispersed in the polymer resin to form the polymer resin body 2, it is optional. A laser beam with a wavelength can be selected, and recording with a laser with a lower output becomes possible. Specific examples of the dyes used are shown in the table below.
圧縮体１の加熱手段はレーザー光だけではなく別の手段
であってもよい。例えば針状の抵抗発熱体等の加熱体を
接触させる事でも記録が可能である。 The heating means for the compressed body 1 is not limited to laser light, and may be another means. For example, recording can also be performed by bringing a heating element such as a needle-shaped resistance heating element into contact.
また前記実施例においては、圧縮体１は全体に均一に圧
縮されて形成されたが、部分的に圧縮して形成されても
よい。例えば第４図に示したように、レーザー光が照射
されるトラック上のみ高分子樹脂体の圧縮を行って圧縮
体１′が形成されてもよい。Further, in the above-mentioned embodiment, the compression body 1 is formed by being uniformly compressed as a whole, but it may be formed by being partially compressed. For example, as shown in FIG. 4, the polymer body may be compressed only on the track irradiated with the laser beam to form the compressed body 1 '.
記録情報の読み出しは、第５図に示したレーザー光の出
力を数mWに落とし、圧縮体１からの反射光の強度をフォ
トセンサー８によって読み取る事によって行う。The recorded information is read by reducing the output of the laser light shown in FIG. 5 to several mW and reading the intensity of the reflected light from the compression body 1 by the photo sensor 8.
記録情報の消去は圧縮体１に再加圧を行う事により可能
となる。The recorded information can be erased by re-pressurizing the compressed body 1.
以上の本願の第１の発明の感熱記録体は、前述した記
録，消去の機能を用いて、他に例えば再生のできる製版
用の版板、樹脂用の型等として用いる事ができる。The heat-sensitive recording material of the first invention of the present application described above can be used as, for example, a reproducible plate plate for molding, a resin mold, etc. by using the recording and erasing functions described above.
次に本願の第２の発明の実施例を図面を用いて詳細に説
明する。なお以下の説明で用いる圧縮体の製造方法及び
記録方法は本願第１の発明の実施例で述べたのでここで
は省略する。Next, an embodiment of the second invention of the present application will be described in detail with reference to the drawings. The manufacturing method and the recording method of the compressed body used in the following description have been described in the first embodiment of the present invention, and therefore will be omitted here.
第６図は本願の第２の発明の感熱記録体を構成する接合
体の縦断面図であり、高分子樹脂体（以下、高分子体と
呼ぶ）２と圧縮体１とを接合させて接合体９を構成す
る。接合体９は厚みA0の高分子体２を圧縮して、厚みA1
の圧縮体１を作成し、この圧縮体１と高分子体２とを接
合させて形成される。接合体の他に圧縮体１と高分子体
２とを可動性の接着剤等で接着させた接着体で構成され
てもよい。次に第７図に示したようにアクリル等の透明
かつ耐熱性のある樹脂ケース10に高分子体２と圧縮体１
とを剥離しないように封止する。このように得られたデ
ィスク11が感熱記録体である。このディスク11に記録を
行う方法は前述した本願第１の発明の圧縮体１の記録の
場合と同様であるが、第８図に示すように、レーザー光
を圧縮体１側に集光するようにレンズ７を調整する事に
よって行われる。記録の読み出しは圧縮体１と高分子体
２との境界面でのレーザー光の反射率あるいは透過率の
有無によって行う。以下、第９図を用いて記録法につい
て詳細に説明する。第９図（ａ）に示すように圧縮体１
側に集光したレーザー光のエネルギーにより加熱される
と、圧縮体１の一部が熱復元しようとするが、高分子体
２がまた熱せられていない為に弾性率が高く復元しな
い。しかし圧縮体１の加熱された一部から高分子体２へ
熱拡散により熱が伝わるに従って高分子体２の弾性率が
減少する。次に熱が高分子体２に伝わる事により、加熱
によって低下した圧縮体１の弾性率が徐々に増加する。
これにより第９図（ｂ）に示したように圧縮体１の復元
部12が高分子体２に食い込み記録ドットが形成される。
この時復元部12によって高分子体２の一部が圧縮され、
圧縮部13が形成される。次にこの記録ドットを消去する
場合は、第９図（ｃ）に示したように高分子体２に残さ
れた圧縮部13にレーザー光が集光するようにレンズ７を
移動させれば、前述した記録過程と同様にして圧縮部13
が復元し、記録ドットが消去されて記録前の状態とな
り、再利用が可能となる。なおこの場合のレーザー光の
エネルギーは圧縮体１の厚みと成形体２の厚みとによっ
て異なり、最適なものに設定する。FIG. 6 is a vertical cross-sectional view of a bonded body which constitutes the thermosensitive recording medium of the second invention of the present application, in which a polymer resin body (hereinafter referred to as a polymer body) 2 and a compression body 1 are joined together. Make up the body 9 . The bonded body 9 is obtained by compressing the polymer body 2 having a thickness A 0 to obtain a thickness A 1
The compressed body 1 is prepared, and the compressed body 1 and the polymer body 2 are bonded to each other. In addition to the bonded body, the compressed body 1 and the polymer body 2 may be configured by an adhesive body that is adhered by a movable adhesive agent or the like. Next, as shown in FIG. 7, a polymer body 2 and a compression body 1 are placed in a transparent and heat-resistant resin case 10 such as acrylic.
And so as not to peel off. The disk 11 thus obtained is a thermosensitive recording medium. The method of recording on the disk 11 is the same as the case of recording on the compression body 1 of the first invention of the present application, but as shown in FIG. 8, the laser beam is focused on the compression body 1 side. This is done by adjusting the lens 7 to. Recording is read out by the presence or absence of the reflectance or the transmittance of the laser beam at the boundary surface between the compression body 1 and the polymer body 2. Hereinafter, the recording method will be described in detail with reference to FIG. As shown in FIG. 9 (a), the compressed body 1
When heated by the energy of the laser beam focused on the side, a part of the compressed body 1 tries to be thermally restored, but since the polymer body 2 is not heated again, it has a high elastic modulus and is not restored. However, as heat is transferred from the heated part of the compressed body 1 to the polymer body 2 by heat diffusion, the elastic modulus of the polymer body 2 decreases. Next, the heat is transferred to the polymer body 2, whereby the elastic modulus of the compressed body 1 lowered by the heating gradually increases.
As a result, as shown in FIG. 9B, the restoring portion 12 of the compression body 1 bites into the polymer body 2 to form a recording dot.
At this time, a part of the polymer 2 is compressed by the restoration part 12,
The compression part 13 is formed. Next, when erasing the recording dots, as shown in FIG. 9C, the lens 7 is moved so that the laser light is focused on the compression portion 13 left in the polymer body 2. In the same manner as the recording process described above, the compression unit 13
Is restored, the recorded dots are erased, and the state before recording is restored, enabling reuse. The energy of the laser beam in this case differs depending on the thickness of the compression body 1 and the thickness of the molded body 2, and is set to the optimum one.
以上、前記実施例の高分子体２と圧縮体１を貼り合わせ
たディスク11の感熱記録体を用いれば同一な光学系で記
録，消去が可能となる。As described above, by using the thermosensitive recording body of the disk 11 in which the polymer body 2 and the compression body 1 of the above-mentioned embodiment are bonded, recording and erasing can be performed by the same optical system.
以上詳細に説明したように、本願の第１の発明の感熱記
録体によれば、高分子材料を用いる為に安く、熱絶縁性
が高いために記録密度が向上し、熱復元温度が低くかつ
溶解しないために加熱手段のエネルギーが低く、又色素
の含有により任意の波長の光源が使えるために低パワー
で記録のできる感熱記録体を提供する事ができる。As described in detail above, according to the heat-sensitive recording material of the first invention of the present application, it is cheap because a polymer material is used, and the thermal insulating property is high, so that the recording density is improved, and the heat restoration temperature is low. Since it does not dissolve, the energy of the heating means is low, and since the light source of any wavelength can be used by containing the dye, it is possible to provide a heat-sensitive recording material capable of recording with low power.
本願の第２の発明の感熱記録体によれば、高分子材料を
用いる為に安く、熱絶縁性が高いために記録密度が向上
し、熱復元温度が低くかつ溶解しないために加熱手段の
エネルギーが低く、又色素の含有により任意の波長の光
源が使えるために低パワーで記録でき、情報の記録，消
去が可逆的に簡易でき繰り返し再使用のできる感熱記録
体を提供する事ができる。According to the heat-sensitive recording material of the second invention of the present application, it is cheap because a polymer material is used, the recording density is improved due to high thermal insulation, and the energy of the heating means is low because the heat recovery temperature is low and it does not melt. It is possible to provide a thermosensitive recording medium which is low in power consumption and can be used for recording with low power because a light source having an arbitrary wavelength can be used by containing a dye and information can be recorded and erased reversibly and which can be reused repeatedly.
第１図は本願の第１の発明の感熱記録体の縦断面図であ
る。 第２図は本願の第１の発明の感熱記録体の圧縮前の高分
子樹脂体の縦断面図である。 第３図は本願の第１の発明の感熱記録体と従来の光ディ
スクとの記録方法を示す縦断面図であり、（ａ）は従来
の光ディスクの縦断面図であり、（ｂ）は本願の第１の
発明の感熱記録体の縦断面図である。 第４図は本願の第１の発明の感熱記録体の別な実施例で
ある。 第５図は本願の第１の発明の感熱記録体を用いた記録方
法の模式図である。 第６図は本願の第２の発明の感熱記録体を構成する接合
体の縦断面図である。 第７図は本願の第２の発明の感熱記録体の縦断面図であ
る。 第８図は本願の第２の発明の感熱記録体を用いた記録方
法の模式図である。 第９図は本願の第２の発明の感熱記録体の記録，消去動
作を示す縦断面図である。 1,1′……圧縮体、２……高分子樹脂体、９……接合体
又は接着体、10……アクリルケース、11……ディスク。FIG. 1 is a vertical cross-sectional view of a thermosensitive recording medium according to the first invention of the present application. FIG. 2 is a longitudinal sectional view of a polymer resin body before compression of the heat-sensitive recording body of the first invention of the present application. FIG. 3 is a longitudinal sectional view showing a recording method of the thermal recording medium according to the first invention of the present application and a conventional optical disc, (a) is a longitudinal sectional view of the conventional optical disc, and (b) is the present invention. It is a longitudinal cross-sectional view of the thermosensitive recording medium of the first invention. FIG. 4 shows another embodiment of the thermosensitive recording medium of the first invention of the present application. FIG. 5 is a schematic diagram of a recording method using the thermosensitive recording medium of the first invention of the present application. FIG. 6 is a vertical cross-sectional view of a bonded body constituting the thermal recording medium of the second invention of the present application. FIG. 7 is a vertical cross-sectional view of the thermosensitive recording medium of the second invention of the present application. FIG. 8 is a schematic diagram of a recording method using the thermosensitive recording medium of the second invention of the present application. FIG. 9 is a longitudinal sectional view showing the recording / erasing operation of the thermosensitive recording medium of the second invention of the present application. 1,1 '... Compressed body, 2 ... Polymer resin body, 9 ... Joined or bonded body, 10 ... Acrylic case, 11 ... Disc.
Claims (2)
よって形成された熱復元性を有する感熱記録体であっ
て、該感熱記録体を部分的に加熱して熱復元させ、ドッ
ト状の山を形成することによって記録ができる様にした
事を特徴とする感熱記録体。1. A heat-sensitive recording material having a heat-restoring property, which is formed by compressing a flake-shaped polymer resin, wherein the heat-sensitive recording material is partially heated to be heat-restored, and a dot-shaped mountain is formed. A heat-sensitive recording material characterized by being capable of recording by forming a.
よって形成された熱復元性を有する圧縮体と高分子樹脂
体とを接合又は接着することによって形成された感熱記
録体であって、該感熱記録体を部分的に加熱して圧縮体
を熱復元させ、高分子樹脂体に食い込むようにドット状
の山を形成することによって記録がなされ、前記ドット
状の山によって圧縮された前記高分子樹脂体の圧縮部を
加熱し、該圧縮部を熱復元させることによって記録が消
去できる様にした事を特徴とする感熱記録体。2. A heat-sensitive recording material formed by bonding or adhering a heat-recoverable compression body formed by compressing a flake-shaped polymer resin and a polymer resin body. Recording is performed by partially heating the thermosensitive recording medium to thermally restore the compressed body and forming dot-shaped peaks so as to bite into the polymer resin body, and the polymer compressed by the dot-shaped peaks. A heat-sensitive recording material, characterized in that a record can be erased by heating a compressed part of a resin body and thermally restoring the compressed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60075278A JPH07102738B2 (en) | 1985-04-11 | 1985-04-11 | Thermal recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60075278A JPH07102738B2 (en) | 1985-04-11 | 1985-04-11 | Thermal recording |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61235187A JPS61235187A (en) | 1986-10-20 |
| JPH07102738B2 true JPH07102738B2 (en) | 1995-11-08 |
Family
ID=13571600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60075278A Expired - Fee Related JPH07102738B2 (en) | 1985-04-11 | 1985-04-11 | Thermal recording |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07102738B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57111839A (en) * | 1980-05-14 | 1982-07-12 | Rca Corp | Reversible information recording body and method of reversibly recording and erasing information to said recording body |
| JPS5814335A (en) * | 1981-07-20 | 1983-01-27 | Tdk Corp | Optical recording medium and information writing and erasing method |
-
1985
- 1985-04-11 JP JP60075278A patent/JPH07102738B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61235187A (en) | 1986-10-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |