JPS63164043A - Formation of optical disk - Google Patents
Formation of optical diskInfo
- Publication number
- JPS63164043A JPS63164043A JP30826886A JP30826886A JPS63164043A JP S63164043 A JPS63164043 A JP S63164043A JP 30826886 A JP30826886 A JP 30826886A JP 30826886 A JP30826886 A JP 30826886A JP S63164043 A JPS63164043 A JP S63164043A
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- substrates
- disk
- adhesive
- substrate
- 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
- 230000003287 optical effect Effects 0.000 title claims description 16
- 230000015572 biosynthetic process Effects 0.000 title abstract 2
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 21
- 230000001681 protective effect Effects 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 5
- 229920003002 synthetic resin Polymers 0.000 abstract description 3
- 239000000057 synthetic resin Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 230000013011 mating Effects 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 19
- 230000006866 deterioration Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は映像または音声等の情報信号を高密度に記録再
生する元ディスクに関し、特に、その光ディスクを両面
使用とするための形成方法に関するものである。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a source disk for recording and reproducing information signals such as video or audio at high density, and in particular, for making the optical disk double-sided. This relates to a method of forming.
（従来の技術）
従来光ディスクは第４図に示す様に信号ピクト１が設け
られた射出成形によるプラスチックス基板２と、この基
板上に順次形成されたアルミニウムの反射膜３と合成樹
脂から成る保護膜４及びホットメルト等の接着剤５どう
しが互いに対向して重ね合わされこれらを積層した構造
ンこなっている。(Prior Art) As shown in Fig. 4, a conventional optical disc has a protection structure consisting of an injection-molded plastic substrate 2 on which a signal pictograph 1 is provided, an aluminum reflective film 3 formed on this substrate in sequence, and a synthetic resin. The membrane 4 and the adhesive 5 such as hot melt are stacked facing each other to form a laminated structure.
この様な構造の光ディスクは、アルミニウムの反射膜が
端面に露出している。このことは、アルミニウムが両性
元素であり、かつ化学的に非常に活性な金属であること
から、雰囲気中の湿気により腐蝕され易く耐久性が低い
という問題を生じた。In an optical disk having such a structure, an aluminum reflective film is exposed on the end face. This has resulted in the problem that since aluminum is an amphoteric element and is a very chemically active metal, it is easily corroded by moisture in the atmosphere and has low durability.
一方接着剤に関して述べると、一般に作業性とコスト面
からホットメルトタイプのものが多く用いられているが
、やはりこれも端面から露出している。そのため湿度や
温度の変化による影＃全うけ易く、長期間では劣化して
接着力の低下金招き、接着面から基板が剥離してくると
いう問題がありも
また、この接着剤中に含まれる不純物とりわけ金属イオ
ン例えばＮａ、に等やハロゲン化物、例えばＣｔ、Ｂｒ
等の影響で、これらが保護膜を介して徐々に或いは保
護膜のピンホールを通じて浸透しアルミニウムの反射膜
を侵すという光ディスクにとって致命的な問題点を保有
していた。On the other hand, regarding adhesives, hot melt type adhesives are generally used from the viewpoint of workability and cost, but these are also exposed from the end surface. Therefore, it is easily affected by changes in humidity and temperature, and over a long period of time it deteriorates, resulting in a decrease in adhesive strength and the problem that the substrate peels from the adhesive surface.Also, impurities contained in this adhesive In particular, metal ions such as Na, Ni, etc. and halides such as Ct, Br, etc.
Due to the influence of these factors, optical discs have a fatal problem in that these particles gradually penetrate through the protective film or through pinholes in the protective film and attack the aluminum reflective film.
（発明が解決しようとする問題点）
本発明は上記の問題点を解決するためになされたもので
あり、アルミニウム反射膜の腐蝕を防止し、長期間信頼
性に優れた光ディスクを提供することを目的とする。(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems, and aims to provide an optical disc that prevents corrosion of the aluminum reflective film and has excellent long-term reliability. purpose.
（問題点を解決するための手段）
本発明の元ディスクの形成方法は表面に微細ｉ信号、ピ
ットが形成された透明基板上にアルミニウムの反射膜及
び合成樹脂からなる保護膜を形成しこの保護膜側を対向
させて基板２枚を予め真空により密着させて重ね合わせ
た後、外周端面とブレヤー・スピンドル用中心孔端面の
両方、すなわち基板周縁部と熔融接着（溶着）すること
を特徴とするものであり、特に真空雰囲気中で重ね合わ
せたまま接着剤を全く使用せず溶着することが好ましい
。(Means for Solving the Problems) The method for forming the original disk of the present invention involves forming a reflective film of aluminum and a protective film made of synthetic resin on a transparent substrate on which fine i-signals and pits are formed. The method is characterized in that two substrates are stacked in advance with their film sides facing each other in close contact with each other in a vacuum, and then they are fused and bonded (welded) to both the outer peripheral end face and the end face of the center hole for the Breyer spindle, that is, the peripheral edge of the substrates. In particular, it is preferable to weld the two layers together in a vacuum atmosphere without using any adhesive at all.
（作 用）
こうした本願発明の光ディスクの形成方法によれば保護
膜を対向させた２枚の基板は真空状態で密着しており、
かつ外周端面等の周縁部は溶着しであるため、形成され
た光ディスクの特にアルミニウム反射膜は外部の＃！囲
気とりかけ湿度や温度の影響をうけにくく凍り腐蝕は起
こらなくなることが明らかである。(Function) According to the method for forming an optical disk of the present invention, two substrates with opposing protective films are in close contact with each other in a vacuum state,
In addition, since the peripheral edges such as the outer peripheral end face are welded, the aluminum reflective film of the formed optical disc has no external #! It is clear that when surrounded by air, it is less susceptible to the effects of humidity and temperature, and freeze corrosion will no longer occur.
また、本発明では接着剤を全く使用しないことが可能な
ため、接着剤中の不純物が原因となるアルミニウム反射
膜の腐蝕や接着剤の劣化による剥離等の心配がないこと
があげられる。Further, in the present invention, since it is possible to use no adhesive at all, there is no fear of corrosion of the aluminum reflective film caused by impurities in the adhesive or peeling due to deterioration of the adhesive.
更に、接着剤を用いる従来のものは、接着剤の塗布技術
が難しく、ディスクの周縁部からのはみ出しや塗布ムラ
で未塗布の所が出る可能性があり本発明ではこの様な問
題も解決される。Furthermore, with conventional adhesives, the technique for applying the adhesive is difficult, and there is a possibility that the adhesive may protrude from the periphery of the disk or may remain uncoated due to uneven coating.The present invention solves these problems. Ru.
なお、本発明における基板どうしの密着重ね合わせ時の
真空度はＩ Ｘ １０− ”１’ ｏ ｒ ｒ以上であ
ることが望ましい。これ以下では基板どうしの密着力が
減少するため好ましくない。In the present invention, the degree of vacuum when the substrates are closely stacked together is desirably at least IX10-"1'orr. If the degree is less than this, the adhesion between the substrates decreases, which is not preferable.
また、周縁部を溶層する手段としては、例えば真空ホッ
トプレスを用ることやレーザー加工機を利用することが
できるがその他の手段を用いて周縁部を溶着しても何ら
本発明を損うものでは々い。Further, as a means for welding the peripheral edge, for example, a vacuum hot press or a laser processing machine can be used, but the present invention will not be impaired in any way if the peripheral edge is welded using other means. There are so many things.
（実施例） 以下、本発明の実施例を図面を参照にして説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
実施例１
まず第１図に示す様にポリメチルメタクリレート（住友
化学工業０Ｉ＃製商品名：スミペックスＢＬＯ−６）か
らなり、光情報が多数の微細などット１１として刻設さ
れた射出成形によるディスク基板１２を用意した。次に
第２図に示す通り基板１２のピット１１が設けられてい
る側の全面にアルミニウムによる反射膜１３を通常の真
空蒸着法で厚さ１５００Ａ形成し、その上にさらにアク
リル系の樹脂（大日本インキ化学工業（掬製商品名：ダ
イキュアクリア５Ｄ−２２）をコートし保護膜１４とし
て形成させた。Example 1 First, as shown in Fig. 1, a polymethyl methacrylate (trade name: Sumipex BLO-6 manufactured by Sumitomo Chemical Industries, Ltd. 0I#) was made by injection molding in which optical information was engraved as a large number of fine dots 11. A disk substrate 12 was prepared. Next, as shown in FIG. 2, a reflective film 13 made of aluminum is formed to a thickness of 1500A on the entire surface of the substrate 12 on the side where the pits 11 are provided, using a normal vacuum evaporation method. A protective film 14 was formed by coating with Nippon Ink Chemical Industry Co., Ltd. (trade name: Daikyure Clear 5D-22).
このように積層した基板２枚を保護膜１４どうしを対向
するようにして、外周及び中心孔合わせを真空容器内に
於て行った後、真空度ｌＸｌ０−’Ｔ ｏ ｒ ｒに真
空引きした。そしてその後第３図の様に周縁部１５を電
熱溶断機を用いて溶着させた。The two substrates thus laminated were placed so that the protective films 14 faced each other, and the outer periphery and center hole were aligned in a vacuum container, and then the vacuum was evacuated to a vacuum degree of 1X10-'T or r. Then, as shown in FIG. 3, the peripheral edge 15 was welded using an electrothermal welding machine.
すなわち、本発明によれば、ディスク基板２枚を真空に
より密着させた後、周縁部１５を溶着するのでアルミニ
ウム反射膜１３及び保護膜１４の端面からの露出がなく
、接着剤を用いずに積層化できる。それ故、雰囲気、特
に温度や湿度の変化に対してアルミニウム反射膜は強く
なり、又接着剤を用いてないので接着剤の劣化による剥
離及び混入不純物によるアルミ反射膜の劣化を心配しな
くてよいため従来に比ベアルミニウム反射膜１３は非常
に腐蝕されにぐくなる。That is, according to the present invention, after the two disk substrates are brought into close contact with each other in a vacuum, the peripheral edge portions 15 are welded, so that the aluminum reflective film 13 and the protective film 14 are not exposed from the end surfaces, and can be laminated without using adhesive. can be converted into Therefore, the aluminum reflective film is resistant to changes in the atmosphere, especially temperature and humidity, and since no adhesive is used, there is no need to worry about peeling due to adhesive deterioration or deterioration of the aluminum reflective film due to mixed impurities. Therefore, the aluminum reflective film 13 is much more resistant to corrosion than in the past.
実施例２
実施例１と同様にした積層体１５を真空ホットプレス内
にセットした後、真空引きしｌＸｌ０−’Ｔｏｒｒの真
空度のまま、周縁部１７のみをプレス溶断機で熔着して
本発明による光ディスクを形成した。Example 2 After setting the laminate 15 in the same manner as in Example 1 in a vacuum hot press, only the peripheral portion 17 was welded with a press fusing machine while maintaining the vacuum level of 1X10-' Torr. An optical disc according to the invention was formed.
本発明によれば、ディスク基板２枚を真空により密着さ
せた後周縁部を熔着するため、従来では端面から露出し
ていたアルミニウム反射膜及び保護膜及び接着剤のはみ
出しがなく、またディスク基板の合わせ部分が真空状態
になっている。そのため、温度、湿度の変化による劣化
に対して特にアルミニウム反射膜はその耐性が向上する
。さらに接着剤を用いないため、接着剤中に混入してい
る不純物による腐蝕は全く生ずることがなく、さらに耐
熱性も向上する。According to the present invention, after the two disk substrates are brought into close contact with each other in a vacuum, the peripheral edges are welded, so that there is no protrusion of the aluminum reflective film, protective film, and adhesive that were exposed from the edge surface in the past, and the disk substrates are The joint part is in a vacuum state. Therefore, the resistance of the aluminum reflective film in particular to deterioration due to changes in temperature and humidity is improved. Furthermore, since no adhesive is used, corrosion due to impurities contained in the adhesive does not occur at all, and heat resistance is also improved.
以上の通り、本発明によればアルミニウム反射膜の腐蝕
劣化を防止でき、これより耐久性のある高信頼性の光デ
ィスクを形成することができる。As described above, according to the present invention, it is possible to prevent corrosion and deterioration of the aluminum reflective film, thereby making it possible to form a more durable and highly reliable optical disc.
第１′図は本発明の実施例で用いたディスク基板の断面
図、第２図は第１図で示したディスク基板にアルミニウ
ム反射膜及び保護膜を設けた状態の断面図、第３図は本
発明の実施例による光ディスクの断面図、第４図は従来
の光ディスクの断面図である。
１２・・・・・・・・・ディスク基板
１３・・・・・・・・・アルミニウム反射膜１４・・・
・・・・・・保護膜Figure 1' is a sectional view of the disk substrate used in the embodiment of the present invention, Figure 2 is a sectional view of the disk substrate shown in Figure 1 with an aluminum reflective film and a protective film provided, and Figure 3 is a sectional view of the disk substrate used in the embodiment of the present invention. FIG. 4 is a sectional view of an optical disc according to an embodiment of the present invention, and FIG. 4 is a sectional view of a conventional optical disc. 12...Disk substrate 13...Aluminum reflective film 14...
······Protective film
Claims (2)
ら成る光ディスクの形成方法であって、該基板を予め真
空により密着、重ね合わせる工程と、該基板の周縁部を
熔融接着する工程とを具備したことを特徴とする光ディ
スクの形成方法。(1) A method for forming an optical disk consisting of a laminate of two disc-shaped substrates having light-reflecting films, which includes the steps of adhering and overlapping the substrates in advance in a vacuum, and melting and bonding the peripheral edges of the substrates. A method for forming an optical disc, comprising the steps of:
とを特徴とする特許請求の範囲第１項記載の光ディスク
の形成方法。(2) The method for forming an optical disk according to claim 1, wherein the peripheral edge of the substrate is melt-bonded in a vacuum atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30826886A JPS63164043A (en) | 1986-12-26 | 1986-12-26 | Formation of optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30826886A JPS63164043A (en) | 1986-12-26 | 1986-12-26 | Formation of optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63164043A true JPS63164043A (en) | 1988-07-07 |
Family
ID=17978973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30826886A Pending JPS63164043A (en) | 1986-12-26 | 1986-12-26 | Formation of optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63164043A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996016401A1 (en) * | 1994-11-17 | 1996-05-30 | Matsushita Electric Industrial Co., Ltd. | Marking generating apparatus, method of forming laser marking on optical disk, reproducing apparatus, optical disk and optical disk producing method |
| US6052465A (en) * | 1995-10-09 | 2000-04-18 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6144742A (en) * | 1996-05-16 | 2000-11-07 | Mitsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| USRE39297E1 (en) * | 1994-11-17 | 2006-09-19 | Matsushita Electric Industrial Co., Ltd. | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
-
1986
- 1986-12-26 JP JP30826886A patent/JPS63164043A/en active Pending
Cited By (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996016401A1 (en) * | 1994-11-17 | 1996-05-30 | Matsushita Electric Industrial Co., Ltd. | Marking generating apparatus, method of forming laser marking on optical disk, reproducing apparatus, optical disk and optical disk producing method |
| US5761301A (en) * | 1994-11-17 | 1998-06-02 | Matsushita Electric Industrial Co., Ltd. | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE43230E1 (en) | 1994-11-17 | 2012-03-06 | Panasonic Corporation | Optical disk including a barcode pattern formed by a laser using pulse width modulation |
| USRE41041E1 (en) | 1994-11-17 | 2009-12-15 | Panasonic Corporation | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE41032E1 (en) | 1994-11-17 | 2009-12-01 | Panasonic Corporation | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE40969E1 (en) | 1994-11-17 | 2009-11-10 | Panasonic Corporation | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE40687E1 (en) | 1994-11-17 | 2009-03-31 | Panasonic Corporation | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE39653E1 (en) | 1994-11-17 | 2007-05-22 | Matsushita Electric Industrial Co., Ltd. | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| USRE39297E1 (en) * | 1994-11-17 | 2006-09-19 | Matsushita Electric Industrial Co., Ltd. | Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| US6208736B1 (en) | 1995-10-09 | 2001-03-27 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6728882B2 (en) | 1995-10-09 | 2004-04-27 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6229896B1 (en) | 1995-10-09 | 2001-05-08 | Matsushita Electric Industrial, Co., Ltd. | Optical disk, an optical barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6278671B1 (en) | 1995-10-09 | 2001-08-21 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
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| US6285763B1 (en) | 1995-10-09 | 2001-09-04 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6285762B1 (en) | 1995-10-09 | 2001-09-04 | Matsushita Electric Industrial Co., Ltd. | Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, marking forming apparatus, method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6298138B1 (en) | 1995-10-09 | 2001-10-02 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6449366B1 (en) | 1995-10-09 | 2002-09-10 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6457128B1 (en) | 1995-10-09 | 2002-09-24 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6470452B1 (en) | 1995-10-09 | 2002-10-22 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6480960B1 (en) | 1995-10-09 | 2002-11-12 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6552969B1 (en) | 1995-10-09 | 2003-04-22 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6600706B1 (en) | 1995-10-09 | 2003-07-29 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6618347B1 (en) | 1995-10-09 | 2003-09-09 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6175629B1 (en) | 1995-10-09 | 2001-01-16 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6757391B2 (en) | 1995-10-09 | 2004-06-29 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on a optical disk, and a method of manufacturing an optical disk |
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| US7103781B2 (en) | 1995-10-09 | 2006-09-05 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US7110544B2 (en) | 1995-10-09 | 2006-09-19 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6160888A (en) * | 1995-10-09 | 2000-12-12 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
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| US6141419A (en) * | 1995-10-09 | 2000-10-31 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
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| US6128388A (en) * | 1995-10-09 | 2000-10-03 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6125181A (en) * | 1995-10-09 | 2000-09-26 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6122373A (en) * | 1995-10-09 | 2000-09-19 | Matsushita Electric Industrial Co., Ltd. | Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US8014236B2 (en) | 1995-10-09 | 2011-09-06 | Panasonic Corporation | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6052465A (en) * | 1995-10-09 | 2000-04-18 | Matsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
| US6144742A (en) * | 1996-05-16 | 2000-11-07 | Mitsushita Electric Industrial Co., Ltd. | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk |
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