JPS60217541A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS60217541A JPS60217541A JP59074096A JP7409684A JPS60217541A JP S60217541 A JPS60217541 A JP S60217541A JP 59074096 A JP59074096 A JP 59074096A JP 7409684 A JP7409684 A JP 7409684A JP S60217541 A JPS60217541 A JP S60217541A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- signals
- recorded
- recording band
- band
- 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
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
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- 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、光、熱等を用いて高密度に光学情報を記録再
生あるいは消去・書き換えする光ディスクに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical disk on which optical information is recorded, reproduced, erased, and rewritten at high density using light, heat, or the like.
従来例の構成とその問題点
レーザー光を利用して高密度な情報の記録再生あるいは
消去・書き換えする光ディスクは記録特性の点から再生
専用型、記録再生型、記録再生・消去・書き換え可能型
の３つに分類できる。Conventional configurations and their problems Optical discs that use laser light to record, reproduce, erase, and rewrite high-density information are divided into read-only types, record-and-play types, and record-read/erase/rewritable types in terms of recording characteristics. It can be classified into three types.
再生専用型ディスクは、いわゆるビデオディスク、デジ
タルオーディオディスク等と呼ばれるもので、ディスク
表面にあらかじめ信号の凹凸を設けそれにｋｌ等の反射
膜を設置しておき、照射したレーザー光の反射光量の変
化を検出して信号を再生するもので、追記・消去の機能
は無いが、配録信号が高品質で、かつ、その保存特性は
非常に良い。Playback-only discs are so-called video discs, digital audio discs, etc., and the disc surface is made with signal irregularities in advance and a reflective film such as KL is installed on the disc surface to prevent changes in the amount of reflected light from the irradiated laser light. It detects and reproduces the signal, and although it does not have the function of adding or erasing, the recorded signal is of high quality and its storage characteristics are very good.
記録再生型ディスクは、いわゆる静止画ファイル、文書
ファイル、データレコーダ等として使用されているもの
で、ディスク表面に設置した低融点または低昇華点物質
薄膜にパルヌレーチー光を照射ピ熱加工によりピットを
形成して信号を書き込むもの、あるいは、Ｔｅ低酸化物
ＴｅＯｘ２（０＜ｘ２〈２）をディヌク表面に設置しパ
ルスレーザ−光を照射し加熱・冷却すると照射部の反ρ
、ｊ率が変化することを利用して伊号を書き込むもの等
があり、消去の機能はないが高速に多量の信号を書き込
むことができ、かつ、長期保存が可能である。Recording/playback type discs are used for so-called still image files, document files, data recorders, etc., and pits are formed by irradiating Parnurachi light onto a thin film of a low melting point or low sublimation point material placed on the disc surface by thermal processing. Alternatively, a Te low oxide TeOx2 (0<x2<2) is placed on the Dinuku surface, irradiated with pulsed laser light, heated and cooled, and the reflection of the irradiated part is
, there is one that uses the change in the j rate to write the Japanese name, and although it does not have an erasing function, it can write a large amount of signals at high speed and can be stored for a long time.
記録再生・消去・書き換え可能型ディスクは。Recordable/playable/erasable/rewritable discs.
Ｔｏ −Ｓｎ −Ｇｅ −０系酸化物薄膜あるいはカル
コゲナイドガラスの薄膜にパルスレーザ−光を照射し加
熱・急冷すると反射率の小さい状態で安定になり、加熱
・徐冷すると反射率の大きい状態で安定になるという反
射率の可逆的変化を利用して信号を記録するもの、ある
いは、ディスク表面に強磁性薄膜を設置しパルヌレーチ
ー光によシ光磁気書き込みするもの等が提案され実用化
されつつある。When a To -Sn -Ge -0 series oxide thin film or chalcogenide glass thin film is irradiated with pulsed laser light, heated and rapidly cooled, it becomes stable in a state with low reflectance, and when heated and slowly cooled, it becomes stable in a state with high reflectance. Some methods have been proposed and are being put into practical use, such as recording signals by utilizing reversible changes in reflectance, or methods in which a ferromagnetic thin film is placed on the disk surface and magneto-optical writing is performed using Parnurachi light.
また構造の点からは記録帯を片面にのみ有するものと両
面に有するものがある。In terms of structure, there are some that have a recording band on only one side and others that have a recording band on both sides.
しかし、従来の光ディスクは両面に記録帯を有する場合
、その記録特性は両面において同一であシ、片面にのみ
記録帯を有する場合に比較して、ただ単に記憶容量が２
倍になっているだけで使用法は全く同じであシ、その使
用範囲は狭く、限定されていた。However, when a conventional optical disc has a recording band on both sides, its recording characteristics are the same on both sides, and compared to a case where it has a recording band on only one side, the storage capacity is simply 2.
The method of use was exactly the same, just doubled, and the range of use was narrow and limited.
発明の目的
本発明はこのような従来の欠点を除去するものであシ、
様々な使用方法が考えられる使用範囲の広い光ディスク
を提供するものである。OBJECTS OF THE INVENTION The present invention obviates these conventional drawbacks.
The present invention provides an optical disc that can be used in a wide variety of ways.
発明の構成
本発明の光ディスクは、両面に記録帯を有し、かつ、片
面と他の面で記録特性が異なるものである。Structure of the Invention The optical disc of the present invention has recording bands on both sides, and has different recording characteristics on one side and the other side.
上記ディスクは、ディスク作製時に記録した信号の再生
のみが可能な記録帯、信号の記録再生のみ可能な記録帯
、信号の記録再生・消去・書き換え可能な記録帯のうち
の一つを片面に有し、他の面には他の二つの記録帯のう
ちの一つを有することによ多構成される。The above-mentioned discs have one of the following recording bands on one side: a recording band that can only reproduce signals recorded at the time of disk production, a recording band that can only record and reproduce signals, and a recording band that can record, reproduce, erase, and rewrite signals. However, the other side has one of the other two recording bands.
この構成によって、様々な使用方法を有する光ディスク
を提供することができる。With this configuration, it is possible to provide an optical disc that can be used in various ways.
実施例の説明 以下本発明の実施例を図面を参照しながら説明する。Description of examples Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明による光ディヌクである。１は基、（２
で、ガラス、例えば石英、パイレックス、ソーダガラス
等あるいは樹脂、例えばＡＢＳ樹脂。FIG. 1 is an optical dinucu according to the present invention. 1 is the group, (2
and glass, such as quartz, pyrex, soda glass, etc., or resin, such as ABS resin.
ポリスチレン、アクリル、塩化ビニル等が使用できる。Polystyrene, acrylic, vinyl chloride, etc. can be used.
２および３は薄膜記録層からなる記録帯であるが、２と
３ではその記録特性が異なる。記録特性の異なる記録帯
としては、ディスク作製時圧記録した信号の再生のみが
可能な記録帯、信号の記録再生のみが可能な記録帯、信
号の記録再生・消去・書き換え可能な記録帯の３種類が
あるが、２と３はそのうちの２種類を用いる。ディスク
作製時に記録した信号の再生のみが可能な記録帯として
は、ディスク表面にあらかじめ信号の凹凸を設けそれに
ム１等の反射膜を設置しておき、照射したレーザー光の
反射光量の変化を検出して信号を再生するものである。Recording bands 2 and 3 are composed of thin film recording layers, but their recording characteristics are different. There are three types of recording bands with different recording characteristics: a recording band that can only reproduce signals recorded at the time of disk production, a recording band that can only record and reproduce signals, and a recording band that can record, reproduce, erase, and rewrite signals. There are different types, but 2 and 3 use two of them. For a recording band that can only reproduce the signals recorded during disk production, the surface of the disk is made with signal irregularities and a reflective film such as MU1 is placed on it, and changes in the amount of reflected light of the irradiated laser beam are detected. It is used to reproduce the signal.
また、信号の記録再生のみが可能な記録帯としては、デ
ィスク表面に設置した低融点または低昇華点物質薄膜に
パルスレーザ−光を照射し熱加工によシ信号を書き込む
もの、あるいは、Ｔｅ低酸化物ＴｅＯｘ２（０＜ｘ２〈
２）をディスク表面に設置し、パルスレーザ−光を照射
し、加熱・冷却すると照射部の反射率が変化することを
利用して信号を書き込むもの等がある。また、信号の記
録再生・消去・書き換え可能な記録帯としては、Ｔｅ
−８ｎ−Ｇｅ−０系酸化物薄膜あるいはカルコゲイドガ
ラスの薄膜にバルクレーザー光を照射し加熱急冷すると
反射率の小さい状態で安定になシ、加熱・徐冷すると反
射率の大きい状態で安定になるという反射率の可逆的変
化を利用して信号を記録するもの、あるいは、ディスク
表面に強磁性薄膜を設置しパルスレーザ−光により光磁
気書き込みによシ信号を記録するもの等がある。４は接
着剤で、例えばエポキシ樹脂、シリコン樹脂等が使用で
きる。以上のように光ディヌクの両面に記録帯を有し、
かつ片面と他の面で記録特性が異なるものとすることに
よシ、様々な使用方法を有する光ディスクを提供するこ
とができる。In addition, recording bands that can only record and reproduce signals include those that write signals by thermal processing by irradiating pulsed laser light onto a thin film of a low melting point or low sublimation point material placed on the disk surface, or those that write signals by thermal processing. Oxide TeOx2 (0<x2<
2) is placed on the disk surface, pulsed laser light is irradiated, and signals are written by utilizing the change in reflectance of the irradiated area when heated and cooled. In addition, Te
-8n-Ge-0 series oxide thin film or chalcogide glass thin film is irradiated with bulk laser light and heated and rapidly cooled, resulting in a stable state with low reflectance; heating and slow cooling results in a stable state of high reflectance. There are methods that record signals by utilizing a reversible change in reflectance such that the disc becomes opaque, and methods that record signals by magneto-optical writing using pulsed laser light with a ferromagnetic thin film placed on the surface of the disk. 4 is an adhesive, for example, epoxy resin, silicone resin, etc. can be used. As mentioned above, optical dinuks have recording bands on both sides,
Moreover, by making the recording characteristics different between one side and the other side, it is possible to provide an optical disk that can be used in various ways.
なお本実施例では薄膜記録層を有する上下２枚の基材を
接着剤によシ密着したが、第２図に断面図を示したよう
な、スペーサ５による中空構造としてもよい。In this embodiment, the upper and lower substrates each having a thin film recording layer are adhered to each other with an adhesive, but a hollow structure with spacers 5 may be used, as shown in a cross-sectional view in FIG.
次に第３図に本発明の光ディスクを用いた具体的な実施
例１を示す。第３図において記録帯６は信号の記録再生
のみ可能で、Ｔｏ低酸化物’ｒ：ｅｏｘ４（ｘ、中１．
１）の薄膜であシ、これは記録信号の保存性が非常に良
く、長期安定保存が可能である。Next, FIG. 3 shows a concrete example 1 using the optical disc of the present invention. In FIG. 3, the recording band 6 is capable of only recording and reproducing signals, and is made of To low oxide 'r:eox4(x, medium 1.
1) The thin film has very good storage stability of recorded signals and can be stored stably for a long period of time.
この記録帯への記録はパルスレーザ−光を照射し、その
照射部分が加熱・冷却されると反射率が変化することを
利用するものである。Recording on this recording band is performed by irradiating pulsed laser light and utilizing the fact that the reflectance changes when the irradiated area is heated and cooled.
また、記録帯７は信号の記録再生・消去・書き換え可能
なＴｏ−８ｎ −（ｒｅ −０系酸化物薄膜であるが、
その信号保存特性はＴｅ ０ｘ４（ｘ４キ１．１）薄膜
に劣るものである。この記録帯への記録はパルス。In addition, the recording band 7 is a To-8n-(re-0-based oxide thin film) that can record, reproduce, erase, and rewrite signals.
Its signal preservation properties are inferior to Te 0x4 (x4 x 1.1) thin film. Recording to this recording band is pulsed.
レーザー光を照射し加熱・急冷すると反射率の小さい状
態で安定になシ、加熱・徐冷すると反射率の大きい状態
で安定になるという反射率の可逆的変化を利用するもの
である。This method takes advantage of the reversible change in reflectance in that when laser light is irradiated and the material is heated and rapidly cooled, it becomes stable in a state of low reflectance, and when heated and slowly cooled, it becomes stable in a state of high reflectance.
上記二種類の記録特性を有する光ディスクをデータファ
イルに用いる場合について説明する。最初コンピュータ
ーから出力されるすべてのデータは光学へシト１０によ
り記録帯７に記録さｈ、る。A case will be described in which an optical disc having the above two types of recording characteristics is used for a data file. Initially, all data output from the computer are recorded on the recording band 7 by the optical recorder 10.
次に記録されたデータのうち、重要かつ畏期保存必要な
データは光学ヘノド１０で再生しながら同時に光学ヘッ
ド１１で記録帯６に記録する。不要となった記録帯７上
のデータは消去されコンピューターからの次の出力デー
タが記録される。このようにすれば、コンピューターか
らの出力データ奇一枚のディスクを用いるだけで簡単に
編集かつファイルして長期保存することができる。Next, among the recorded data, data that is important and needs to be preserved for a long time is reproduced by the optical head 10 and recorded on the recording band 6 by the optical head 11 at the same time. The data on the recording band 7 that is no longer needed is erased and the next output data from the computer is recorded. In this way, the output data from the computer can be easily edited and filed for long-term storage by using just one disc.
以下本発明の第２の実施例について図面を参照しながら
説明する。第４図において記録帯６は上記実施例１にお
ける記録帯６と全く同一のＴｅＯｘ４（０＜ ｘ４＜
２ 、）の薄膜であシ、記録信号の保存性が非常によく
長期安定保存が可能である。また記録帯１３は再生のみ
可能な記録帯で、ディヌク表面にあらかじめ信号の凹凸
を設けそれにＡｄの反射膜を設置したものである。上記
二種類の記録特性を有する光テ゛イスクを特許検索用フ
ァイルとして用いる場合について説明する。最初にディ
スク作製時までに公開および公告された特許（は記録帯
１３にあらかじめ記録してユーザーに提供する。A second embodiment of the present invention will be described below with reference to the drawings. In FIG. 4, the recording strip 6 is exactly the same as the recording strip 6 in Example 1, with TeOx4 (0<x4<
2) The thin film of 2.) has very good storage stability of recorded signals and can be stored stably for a long period of time. The recording band 13 is a recording band that can only be reproduced, and has signal irregularities formed on the surface of the DINUK in advance and an Ad reflective film placed thereon. A case will be described in which an optical disk having the above two types of recording characteristics is used as a patent search file. Patents that have been published and announced by the time the disc is first produced are recorded in advance on the recording band 13 and provided to the user.
ユーザーはその中より必要なファイルを光学ヘッド１２
によシ再生すると同時に、それ以降公開および公告され
た特許についてはディスクの裏表を逆にして、記録帯６
へ光“学−・７ド１２によシ記録１−−７アイルしてゆ
き、必要に応じて光学ヘッド１２によυ再生する。この
ようにすれば、常に最紐の特許情報を有する光ディスク
を容易に作製するととができる。The user selects the necessary files from the optical head 12.
At the same time as playing the disc, for patents that have been published or announced since then, turn the disc upside down and insert the recording band 6.
The optical disk 1--7 is recorded on the optical disk 12, and is played back by the optical head 12 as necessary.In this way, the optical disk always has the latest patent information. can be easily produced.
次に本発明の第３の実施例について図面を参照しながら
説明する。第５図において記録帯７は上記実施例１にお
ける記録帯７と全く同一のＴｅＯｘ５（０〈Ｊ、く２）
を主利料とする記録再生・消去・書き換え可能な薄膜で
あシ、かつ、記録帯１３は上記実施例２における記録帯
７と全く同一でディスク表面にあらかじめ信号の凹凸を
設けそれにＡＩの反射膜を設置したもので再生のみ可能
な記録帯である。Next, a third embodiment of the present invention will be described with reference to the drawings. In FIG. 5, the recording band 7 is exactly the same as the recording band 7 in the above-mentioned Example 1.
The recording band 13 is exactly the same as the recording band 7 in the second embodiment, and the recording band 13 is the same as the recording band 7 in the above-mentioned embodiment 2, and the surface of the disk is provided with signal irregularities in advance to reflect AI. It is a recording band with a membrane that can only be played back.
上記二種類の記録特性を有する光ディスクをワープロの
ＲＯＭかつバックラップメモリとして使用する場合につ
いて説明する。まずディヌク作製時に、ワープロを用い
る時に使うと思われる様々な文書のパターン、例えばあ
いさつ状や案内状などの色々な文書のパターンを記録帯
１３にあらかじめ記録してユーザーに提供する。コ〜−
ザーはその中より必要な文書パターンのファイルを検索
し光学ヘッド１１によりディスプレイ上に再生し、必要
に応じてその文書を訂止し使用する。また作成した文書
のうち、その後も必要と思われるものは光学ヘッド１０
によシ記録帯７に記録され保存される。記録帯７は消去
・書き換え可能であるから不要となった文書は消去し、
新しい文書を記録し直すことができる。このようにすれ
ば、一枚の光ディスクによってワープロによる文書作成
能率を向上させることができる。A case will be described in which an optical disk having the above two types of recording characteristics is used as a ROM and a backlap memory for a word processor. First, when creating a Dinuk, various document patterns that are likely to be used when using a word processor, such as greeting cards and information cards, are recorded in advance on the recording band 13 and provided to the user. Ko~-
The user searches for a necessary document pattern file from among them, reproduces it on the display using the optical head 11, and cancels and uses the document as necessary. Also, among the documents created, those that are considered to be necessary after that are placed on the optical head 10.
It is recorded and saved in the recording band 7. Recording band 7 can be erased and rewritten, so documents that are no longer needed can be erased.
You can re-record new documents. In this way, the efficiency of document creation using a word processor can be improved using a single optical disc.
発明の効果
本発明は、光ディスクの両面に記録帯を有し、かつ、片
面と他の面で記録特性が異なるものとすることによシ、
様々な使用方法が考えられる使用範囲の広い光ディスク
を提供することを可能とするものである。Effects of the Invention The present invention has recording bands on both sides of an optical disc, and has different recording characteristics on one side and the other side.
This makes it possible to provide an optical disc that can be used in a wide variety of ways.
第１図は本発明による光ディスクの一実施例を示す断面
図、第２図は他の実施例の光ディヌクの断面図、第３図
、第４図、第６図は本発明による光ディヌクの駆動状態
を示す構成図である。
１・・・・・・基材、２，３，６，７．１３・・・・・
−記録帯、４・・・・・・接着剤、５・・・・・・スペ
ーサ、８・・・・・・スピンドル、９・・・・・・モー
タ、１０，１１．１２・・・・・・光学ヘッド。FIG. 1 is a sectional view showing one embodiment of an optical disc according to the present invention, FIG. 2 is a sectional view of an optical disc according to another embodiment, and FIGS. 3, 4, and 6 are sectional views of an optical disc according to another embodiment. It is a block diagram which shows a driving state. 1... Base material, 2, 3, 6, 7.13...
- Recording band, 4...Adhesive, 5...Spacer, 8...Spindle, 9...Motor, 10, 11.12... ...Optical head.
Claims (1)
特性が異なることを特徴とする光ディスク。 （２）片面は信号を記録再生・消去・書き換えできる記
録帯を有し、かつ、他の面は信号の記録再生のみ可能な
記録帯を有することを特徴とする特許請求の範囲第１項
に記載の光ディスク。 （３）片面は信号を記録再生・消去・書き換えできる記
録帯を有し、かつ、他の面はディスク作製時に記録した
信号の再生のみが可能な記録帯を有することを特徴とす
る特許請求の範囲第１項に記載の光ディスク。 （４）片面は信号の記録再生のみ可能な記録帯を有し、
かつ、他の面はディスク作製時に記録した信号の再生の
みが可能な記録帯を有することを特徴とする特許請求の
範囲第１項に記載の光ディスク。 （６）記録帯が信号の記録再生のみ可能な場合はテ／Ｉ
／／Ｉ１０低酸化物ＴｅＯｘ２（０＜ ｘ２＜ ２）の
薄膜を、また、信号の記録再生・消去・書き換え可能な
場合はＴｏ −Ｓｎ −Ｇｅ −０糸酸化物薄膜をそれ
ぞれ記録層とすることを特徴とする特許請求の範囲第１
項に記載の光ディスク。[Scope of Claims] (1) An optical disc having recording bands on both sides and having different recording characteristics on one side and the other side. (2) Claim 1, characterized in that one side has a recording band capable of recording, reproducing, erasing, and rewriting signals, and the other side has a recording band capable of only recording and reproducing signals. The optical disc described. (3) A patent claim characterized in that one side has a recording band on which signals can be recorded, reproduced, erased, and rewritten, and the other side has a recording band on which only signals recorded at the time of disk production can be played back. The optical disc according to scope 1. (4) One side has a recording band that can only record and reproduce signals;
2. The optical disc according to claim 1, wherein the other surface has a recording band capable of only reproducing a signal recorded at the time of manufacturing the disc. (6) If the recording band is only capable of recording and reproducing signals,
Use a thin film of //I10 low oxide TeOx2 (0<x2<2) as the recording layer, or a To-Sn-Ge-0 thread oxide thin film if signals can be recorded/reproduced/erased/rewritable. Claim 1 characterized by
Optical discs listed in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59074096A JPS60217541A (en) | 1984-04-13 | 1984-04-13 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59074096A JPS60217541A (en) | 1984-04-13 | 1984-04-13 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60217541A true JPS60217541A (en) | 1985-10-31 |
Family
ID=13537309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59074096A Pending JPS60217541A (en) | 1984-04-13 | 1984-04-13 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60217541A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0495237A (en) * | 1990-08-13 | 1992-03-27 | Apple Computer Inc | Head for storing optical data and medium |
| EP0841658A2 (en) * | 1996-11-12 | 1998-05-13 | Victor Company Of Japan, Ltd. | Optical disc, optical disc recording reproducing apparatus and production method of the optical disc |
| US6633525B2 (en) | 1992-10-05 | 2003-10-14 | Mitsubishi Denki Kabushiki Kaisha | Optical disk having an attribute which designates whether a recording area permits rewriting or not |
| US6775220B2 (en) | 1992-10-05 | 2004-08-10 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7548497B2 (en) | 1992-10-05 | 2009-06-16 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7566417B2 (en) | 2002-08-08 | 2009-07-28 | Kobe Steel, Ltd. | Ag base alloy thin film and sputtering target for forming Ag base alloy thin film |
-
1984
- 1984-04-13 JP JP59074096A patent/JPS60217541A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0495237A (en) * | 1990-08-13 | 1992-03-27 | Apple Computer Inc | Head for storing optical data and medium |
| US7164641B2 (en) | 1992-10-05 | 2007-01-16 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US6930965B2 (en) | 1992-10-05 | 2005-08-16 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US6633525B2 (en) | 1992-10-05 | 2003-10-14 | Mitsubishi Denki Kabushiki Kaisha | Optical disk having an attribute which designates whether a recording area permits rewriting or not |
| US6775220B2 (en) | 1992-10-05 | 2004-08-10 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7207051B2 (en) | 1992-10-05 | 2007-04-17 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US6853611B2 (en) | 1992-10-05 | 2005-02-08 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7924693B2 (en) | 1992-10-05 | 2011-04-12 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7548497B2 (en) | 1992-10-05 | 2009-06-16 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US6834033B2 (en) * | 1992-10-05 | 2004-12-21 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7227815B2 (en) | 1992-10-05 | 2007-06-05 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| US7254104B2 (en) | 1992-10-05 | 2007-08-07 | Mitsubishi Denki Kabushiki Kaisha | Optical disk and optical disk drive device |
| EP0841658A2 (en) * | 1996-11-12 | 1998-05-13 | Victor Company Of Japan, Ltd. | Optical disc, optical disc recording reproducing apparatus and production method of the optical disc |
| EP0841658A3 (en) * | 1996-11-12 | 1998-10-28 | Victor Company Of Japan, Ltd. | Optical disc, optical disc recording reproducing apparatus and production method of the optical disc |
| US7566417B2 (en) | 2002-08-08 | 2009-07-28 | Kobe Steel, Ltd. | Ag base alloy thin film and sputtering target for forming Ag base alloy thin film |
| US7722942B2 (en) | 2002-08-08 | 2010-05-25 | Kobe Steel, Ltd. | Ag base alloy thin film and sputtering target for forming Ag base alloy thin film |
| US7776420B2 (en) | 2002-08-08 | 2010-08-17 | Kobe Steel, Ltd. | Ag base alloy thin film and sputtering target for forming Ag base alloy thin film |
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