JPH0850736A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH0850736A JPH0850736A JP6184521A JP18452194A JPH0850736A JP H0850736 A JPH0850736 A JP H0850736A JP 6184521 A JP6184521 A JP 6184521A JP 18452194 A JP18452194 A JP 18452194A JP H0850736 A JPH0850736 A JP H0850736A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- recording medium
- user
- optical recording
- recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1259—Formatting, e.g. arrangement of data block or words on the record carriers on discs with ROM/RAM areas
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は一般的に光記録媒体に関
し、特に、ユーザが使用する記録再生装置で記録、再生
及び消去が可能なＲＡＭ部分と、再生は可能であるが書
き換えは不可能なＲＯＭ部分とを有する光記録媒体に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an optical recording medium, and more particularly, to a RAM portion which can be recorded, reproduced and erased by a recording / reproducing apparatus used by a user, and which can be reproduced but cannot be rewritten. Optical recording medium having a simple ROM portion.
【０００２】近年コンピュータソフトウエアの著作権の
保護は大きな問題となっている。ソフトウエアを提供す
る立場からは、不正に複写を行って使用されることを防
ぐため、様々なコピープロテクトを媒体に施してきた
が、最近ではＲＯＭ（読み出し専用メモリ）によるソフ
トウエアの提供が一般的になりつつある。Recently, the protection of copyright of computer software has become a big problem. From the standpoint of providing software, various copy protections have been applied to the medium in order to prevent unauthorized copying and use. Recently, however, software is generally provided by ROM (read-only memory). It is becoming a reality.
【０００３】[0003]
【従来の技術】情報を大量に記録できることで最近盛ん
に使用されている光記録媒体であるＣＤ−ＲＯＭは、そ
の全面が読み出し専用領域となっており、書き込みがで
きるかできないかを判断するだけで、正規に頒布された
媒体か不正利用されている媒体かを容易に判別すること
ができる。2. Description of the Related Art A CD-ROM, which is an optical recording medium which has been widely used recently because it can record a large amount of information, has a read-only area on its entire surface, and only judges whether writing is possible or not. Thus, it is possible to easily determine whether the medium is a legally distributed medium or an illegally used medium.
【０００４】しかしユーザの立場で見た場合、ＣＤ−Ｒ
ＯＭは再生が遅い上、記録・消去が可能なユーザ領域が
ないため、運用における自由度がないという欠点があ
り、これに代わる記録媒体として再生専用領域と記録再
生領域とを併せ持つ光磁気記録媒体、いわゆるパーシャ
ルＲＯＭ媒体が提案されている。However, from the user's point of view, the CD-R
The OM has a drawback that it has a low degree of freedom in operation because it is slow to reproduce and does not have a user area in which recording / erasing is possible. As an alternative recording medium, a magneto-optical recording medium having both a reproduction-only area and a recording / reproducing area. A so-called partial ROM medium has been proposed.
【０００５】従来のパーシャルＲＯＭ媒体においては、
基板の一部に凹凸ピット（ＲＯＭピット）を予め刻んで
おき、反射率の変化を再生信号とする領域を設けること
で、パーシャルＲＯＭを達成していた。この方法だとＣ
Ｄ−ＲＯＭとほぼ同等の技術で呼出し専用のソフトウエ
アの提供が可能となる。In the conventional partial ROM medium,
A partial ROM has been achieved by previously forming uneven pits (ROM pits) on a part of the substrate and providing a region in which a change in reflectance is used as a reproduction signal. This way C
It is possible to provide call-dedicated software with almost the same technology as D-ROM.
【０００６】[0006]
【発明が解決しようとする課題】光ディスクの基板は樹
脂を射出成形して作成するという方法をとるため、従来
のパーシャルＲＯＭ媒体ではまず第一にマスターとなる
金型（スタンパ）が必要となる。従って新しいソフトウ
エアを提供する場合には、新たな情報が記録されたスタ
ンパを新たに作成する必要がある。Since the substrate of the optical disk is formed by injection molding a resin, the conventional partial ROM medium first requires a die (stamper) as a master. Therefore, when providing new software, it is necessary to newly create a stamper in which new information is recorded.
【０００７】スタンパを作成するには、高度な装置や技
術が要求されるため、このような設備を持たないソフト
ウエア提供者は、従来のパーシャルＲＯＭ媒体を提供す
る場合には、スタンパの作成更には基板成形が可能な第
３者に依頼しなければならないという欠点があった。ま
た、量産が始まった段階でソフトウエアの不具合が発見
された場合も、従来のパーシャルＲＯＭ媒体では修正
（デバッグ）することが不可能であった。Since a sophisticated device and technique are required to create a stamper, a software provider who does not have such equipment needs to create a stamper when providing a conventional partial ROM medium. Had the drawback of having to ask a third party who can mold the substrate. Further, even if a software defect is found at the stage of mass production, it cannot be corrected (debugged) by the conventional partial ROM medium.
【０００８】更に、ソフトウエアの複製防止等を行いた
い場合には、媒体製造者又はソフトウエア提供者はユー
ザの使用する記録再生装置で読むことの可能な媒体固有
の情報（製造番号、シリアルナンバ等）を載せて媒体を
販売したい場合があるが、このようなことは従来のパー
シャルＲＯＭ媒体では不可能であった。Further, in order to prevent the duplication of software or the like, the medium manufacturer or the software provider needs the medium-specific information (manufacturing number, serial number) readable by the recording / reproducing apparatus used by the user. There is a case where it is desired to sell the medium by mounting the same), but this is not possible with the conventional partial ROM medium.
【０００９】本発明はこのような点に鑑みて成されたも
のであり、その目的とするところは、ソフトウエアを提
供するに際して極めて容易にパーシャルＲＯＭ媒体を達
成できる光記録媒体を提供することである。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical recording medium that can very easily achieve a partial ROM medium when providing software. is there.
【００１０】[0010]
【課題を解決するための手段】本発明によると、光によ
り情報を記録再生可能な光記録媒体において、媒体製造
者及び／又はソフトウェア提供者は情報の記録、再生及
び消去が可能であるがユーザの使用する記録再生装置で
は記録された情報の再生のみが可能なＲＯＭ部と、ユー
ザの使用する記録再生装置で情報の記録、再生及び消去
が可能なＲＡＭ部とを有することを特徴とする光記録媒
体が提供される。According to the present invention, in an optical recording medium capable of recording and reproducing information by light, the medium manufacturer and / or the software provider can record, reproduce and erase information, but the user The recording / reproducing apparatus used by the optical disc has a ROM section capable of reproducing only recorded information and a RAM section capable of recording, reproducing and erasing information by the recording / reproducing apparatus used by the user. A recording medium is provided.
【００１１】[0011]
【作用】本発明の光記録媒体がユーザが記録、再生及び
消去可能なＲＡＭ部分と、ユーザが再生のみ可能なＲＯ
Ｍ部分を共存可能なのは、記録温度の違いを利用してい
ることによる。The optical recording medium of the present invention has a RAM portion that can be recorded, reproduced and erased by the user, and an RO that can be reproduced only by the user.
The M portion can coexist because the difference in recording temperature is used.
【００１２】ユーザが再生のみ可能なＲＯＭ部分に記録
温度の高い媒体を設けているため、ユーザの使用する記
録再生装置では情報の消去及び書き換えをすることがで
きない。Since the medium having a high recording temperature is provided in the ROM portion which can be reproduced only by the user, the recording / reproducing apparatus used by the user cannot erase or rewrite information.
【００１３】その理由は、ユーザが使用する記録再生装
置の最大レーザ出力は１５ｍＷ程度以下であることによ
る。しかし、ガスレーザ等大型で高価なものでは１５ｍ
Ｗ以上の最大出力は可能であり、このようなレーザを搭
載した記録再生装置を媒体製造者又はソフトウエア提供
者が使用することにより、記録温度の高い媒体に情報の
記録が可能である。The reason is that the maximum laser output of the recording / reproducing apparatus used by the user is about 15 mW or less. However, it is 15m for large and expensive gas lasers.
A maximum output of W or more is possible, and information can be recorded on a medium having a high recording temperature by using a recording / reproducing device equipped with such a laser by a medium manufacturer or a software provider.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。図１は本発明第１実施例の光磁気ディスク
２Ａを示しており、（Ａ）は斜視図、（Ｂ）はその断面
構成図をそれぞれ示している。光磁気ディスク２Ａは、
インナー側にユーザが記録、再生及び消去可能なＲＡＭ
部４ａを有しており、アウター側に再生のみ可能なＲＯ
Ｍ部６ａを有している。Embodiments of the present invention will now be described in detail with reference to the drawings. 1A and 1B show a magneto-optical disk 2A according to a first embodiment of the present invention. FIG. 1A is a perspective view, and FIG. 1B is a sectional configuration view thereof. The magneto-optical disk 2A is
RAM that the user can record, play and erase on the inner side
RO that has a part 4a and is only playable on the outer side
It has an M portion 6a.
【００１５】図１（Ｂ）に示すように、ＲＡＭ部４ａは
ポリカーボネイト基板８上にＳｉＮ誘電体層１０、Ｔｂ
ＦｅＣｏ記録層１２、ＳｉＮ誘電体層１４及びＡｌ反射
膜１６をこの順に積層して構成されている。また、ＲＯ
Ｍ部６ａはＴｂＣｏ記録層１８を採用しており、他の構
成はＲＡＭ部４ａと同様である。As shown in FIG. 1 (B), the RAM portion 4a has a SiN dielectric layer 10 and Tb on a polycarbonate substrate 8.
The FeCo recording layer 12, the SiN dielectric layer 14, and the Al reflection film 16 are laminated in this order. Also, RO
The M section 6a employs the TbCo recording layer 18, and the other configuration is the same as that of the RAM section 4a.
【００１６】ＲＡＭ部４ａの記録層１２は１９０°Ｃの
キュリー温度を有しており、ＲＯＭ部６ａの記録層１８
はユーザが使用する光磁気ディスク装置で昇温可能な温
度よりも高い３００°Ｃのキュリー温度を有している。
本実施例は光磁気ディスクであるので、信号の再生には
両部分ともカー効果を用いる。The recording layer 12 of the RAM section 4a has a Curie temperature of 190 ° C., and the recording layer 18 of the ROM section 6a.
Has a Curie temperature of 300 ° C. higher than the temperature that can be raised by the magneto-optical disk device used by the user.
Since this embodiment is a magneto-optical disk, the Kerr effect is used in both parts for signal reproduction.
【００１７】図２は本発明第２実施例の光ディスクを示
している。光ディスク２Ｂはユーザが記録、再生及び消
去可能なＲＡＭ部４ｂは光磁気記録媒体から構成され、
再生のみ可能なＲＯＭ部６ｂは追記型記録媒体（ライト
ワンス記録媒体）から構成される。FIG. 2 shows an optical disk according to the second embodiment of the present invention. The optical disk 2B has a RAM section 4b which can be recorded, reproduced and erased by the user, and is composed of a magneto-optical recording medium.
The read-only ROM section 6b is composed of a write-once recording medium (write-once recording medium).
【００１８】本実施例のＲＡＭ部４ｂは第１実施例のＲ
ＡＭ部４ａと同一構成であり、ＲＯＭ部６ｂには記録温
度が３００°ＣのＡｕＳｎ記録層２０を用いた。再生時
には、ユーザが書き換え可能なＲＡＭ部４ｂにはカー効
果を、ユーザが書き換え不可能なＲＯＭ部６ｂには反射
率を用いる。The RAM section 4b of this embodiment is the R of the first embodiment.
An AuSn recording layer 20 having the same structure as the AM section 4a and a recording temperature of 300 ° C. was used for the ROM section 6b. At the time of reproduction, the Kerr effect is used for the user-rewritable RAM unit 4b, and the reflectance is used for the user-unrewritable ROM unit 6b.
【００１９】図３は本発明第３実施例の光ディスク２Ｃ
を示している。この実施例に示すようにユーザが再生の
み可能なＲＯＭ部をどこに設けることも可能であり、こ
の実施例では追記型記録層２２をＳｉＮ誘電体層１４と
Ａｌ反射膜１６との間に設けて構成した。FIG. 3 shows an optical disk 2C according to the third embodiment of the present invention.
Is shown. As shown in this embodiment, it is possible to provide a ROM section which can be reproduced only by the user. In this embodiment, the write-once recording layer 22 is provided between the SiN dielectric layer 14 and the Al reflection film 16. Configured.
【００２０】本実施例では追記型記録層２２を光ディス
ク全体に設けたために、ソフトウエア提供者がソフトウ
エアを記録するＲＯＭ部の面積を非常に広く取ることが
できる。追記型記録層２２はＴｅ−Ｃから形成され、反
射率変化を読み取ることにより情報を再生する。In this embodiment, since the write-once recording layer 22 is provided on the entire optical disc, the software provider can take a very large area of the ROM portion for recording the software. The write-once recording layer 22 is formed of Te-C, and reproduces information by reading the change in reflectance.
【００２１】ユーザが情報の記録、再生及び消去可能な
ＲＡＭ部には光磁気記録媒体を用いているため、カー効
果を用いて信号を再生することになり、反射率変化に基
づいて信号を再生する追記型記録層２２からの再生信号
と混同することはなく、それぞれ独自に信号を再生する
ことができる。Since the magneto-optical recording medium is used in the RAM section where the user can record, reproduce and erase information, the Kerr effect is used to reproduce the signal, and the signal is reproduced based on the change in reflectance. The signal can be reproduced independently without being confused with the reproduction signal from the write-once recording layer 22.
【００２２】図４は本発明第４実施例の光ディスク２Ｄ
を示しており、ＲＡＭ部４ｄ及びＲＯＭ部６ｄとも相変
化光記録媒体を用いた。ＲＡＭ部４ｄはポリカーボネイ
ト基板８上に、ＺｎＳ−ＳｉＯ2 誘電体層２４、ＧｅＩ
ｎＳｎ記録層２６、ＺｎＳ−ＳｉＯ2 誘電体層２８及び
Ａｌ反射膜１６をこの順に積層して構成される。FIG. 4 shows an optical disk 2D according to the fourth embodiment of the present invention.
The RAM section 4d and the ROM section 6d use the phase change optical recording medium. The RAM portion 4d is formed on the polycarbonate substrate 8 by the ZnS—SiO 2 dielectric layer 24 and GeI.
The nSn recording layer 26, the ZnS—SiO 2 dielectric layer 28, and the Al reflection film 16 are laminated in this order.
【００２３】一方、ＲＯＭ部６ｄは記録層３０にＧｅＳ
ｎＴｅを用い、その他の層構成はＲＡＭ部４ｄと同様に
した。両部分４ｄ、６ｄとも反射率の変化で信号を再生
する。On the other hand, the ROM section 6d has a GeS layer on the recording layer 30.
nTe was used, and the other layer structure was the same as that of the RAM section 4d. Both parts 4d and 6d reproduce the signal by the change of the reflectance.
【００２４】ＧｅＩｎＳｎ記録層２６は概略２５０°Ｃ
程度の結晶化温度を有しているため、ユーザの使用する
記録再生装置で情報の書き換えが可能である。一方、Ｇ
ｅＳｎＴｅ記録層３０は４００°Ｃ以上の結晶化温度を
有しているため、ユーザの使用する記録再生装置では結
晶化温度以上に昇温することは不可能であり、ユーザサ
イドで記録された情報の書き換え又は消去を行うことは
できない。The GeInSn recording layer 26 is approximately 250 ° C.
Since it has a crystallization temperature of about a certain degree, information can be rewritten by a recording / reproducing device used by the user. On the other hand, G
Since the eSnTe recording layer 30 has a crystallization temperature of 400 ° C. or higher, it is impossible for the recording / reproducing apparatus used by the user to raise the temperature above the crystallization temperature. Cannot be rewritten or erased.
【００２５】図５は本発明第５実施例の光ディスク２Ｅ
を示しており、ユーザが記録、再生及び消去可能なＲＡ
Ｍ部４ｅは相変化光記録媒体から構成され、再生のみ可
能なＲＯＭ部６ｅは追記型媒体から構成される。FIG. 5 shows an optical disk 2E according to the fifth embodiment of the present invention.
RA, which can be recorded, reproduced, and erased by the user.
The M section 4e is composed of a phase change optical recording medium, and the ROM section 6e which can only be reproduced is composed of a write-once medium.
【００２６】図５（Ｂ）に示すように、ユーザが書き換
え可能な部分４ｅの記録層にはＧｅＩｎＳｎを用い、ユ
ーザが再生のみ可能な部分６ｅには記録温度が３００°
Ｃ以上のＡｕＳｎから成る記録層２０を用いた。両部分
４ｅ、６ｅとも反射率の変化で情報を再生する。As shown in FIG. 5B, GeInSn is used for the recording layer of the user-rewritable portion 4e, and the recording temperature is 300 ° in the user-rewritable portion 6e.
The recording layer 20 made of AuSn of C or more was used. Information is reproduced by a change in reflectance in both parts 4e and 6e.
【００２７】図６は本発明第６実施例の光ディスク２Ｆ
を示しており、本実施例では図６（Ｂ）に示すようにＴ
ｅ−Ｃから成る追記型記録層２２を誘電体層２８とアル
ミニウム反射膜１６との間に設けて構成した。FIG. 6 shows an optical disk 2F according to the sixth embodiment of the present invention.
In this embodiment, as shown in FIG.
The write-once recording layer 22 made of eC was provided between the dielectric layer 28 and the aluminum reflection film 16.
【００２８】ユーザが再生のみ可能な部分はどこに設け
ることも可能であり、図６の構成に限定されるものでは
ない。ユーザが記録、再生及び消去可能部分の媒体構成
は、図５に示した第５実施例と同様である。It is possible to provide a portion where the user can only reproduce, and the present invention is not limited to the configuration shown in FIG. The medium structure of the user recordable / reproducible / erasable portion is the same as that of the fifth embodiment shown in FIG.
【００２９】図６の構成で、ＧｅＩｎＳｎ記録層２６の
反射率変化と独立して、Ｔｅ−Ｃ追記型記録層２２から
の反射率変化を読み取ることが可能であった。図７は本
発明第７実施例の光ディスク２Ｇを示しており、光ディ
スク２Ｇのユーザが記録、再生及び消去可能なＲＡＭ部
４ｇは光磁気記録媒体から構成され、再生のみ可能なＲ
ＯＭ部６ｇは相変化光記録媒体から構成される。With the structure of FIG. 6, it was possible to read the reflectance change from the Te—C write-once recording layer 22 independently of the reflectance change of the GeInSn recording layer 26. FIG. 7 shows an optical disk 2G according to a seventh embodiment of the present invention. The RAM section 4g on which the user of the optical disk 2G can record, reproduce, and erase is composed of a magneto-optical recording medium, and can reproduce only R.
The OM portion 6g is composed of a phase change optical recording medium.
【００３０】図７（Ｂ）に媒体構成例を示す。ユーザが
書き換え可能な部分４ｇの記録層１２にはキュリー温度
が１９０°ＣのＴｂＦｅＣｏを用いた。また、ユーザが
再生のみ可能な部分６ｇの記録層３０には結晶化温度が
４００°Ｃ以上のＧｅＳｎＴｅを用いた。再生には、ユ
ーザが書き換え可能な部分４ｇにはカー効果を、ユーザ
が再生のみ可能な６ｇには反射率変化を用いる。FIG. 7B shows a medium configuration example. TbFeCo having a Curie temperature of 190 ° C. was used for the recording layer 12 of the user rewritable portion 4 g. Further, GeSnTe having a crystallization temperature of 400 ° C. or higher was used for the recording layer 30 of the portion 6g which can be reproduced only by the user. For reproduction, the Kerr effect is used for the user-rewritable portion 4g, and reflectance change is used for the user-rewritable portion 6g.
【００３１】図８は本発明第８実施例の光ディスク２Ｈ
を示しており、光ディスク２Ｈはユーザが記録、再生及
び消去可能なＲＡＭ部４ｈは相変化光記録媒体から構成
され、再生のみ可能なＲＯＭ部６ｈは光磁気記録媒体か
ら構成される。FIG. 8 shows an optical disk 2H according to the eighth embodiment of the present invention.
In the optical disc 2H, the RAM section 4h that can be recorded, reproduced and erased by the user is composed of a phase change optical recording medium, and the ROM section 6h that can be reproduced only is composed of a magneto-optical recording medium.
【００３２】図８（Ｂ）に媒体構成例を示す。ユーザが
書き換え可能な部分４ｈの記録層２６には結晶化温度が
低いＧｅＩｎＳｎを用い、ユーザが書き換え不可能な部
分６ｈの記録層１８にはキュリー温度が３００°Ｃ以上
のＴｂＣｏを用いた。再生には、ユーザが書き換え可能
な部分４ｈには反射率変化を用い、ユーザが書き換え不
可能な部分６ｈにはカー効果を用いる。FIG. 8B shows a medium configuration example. GeInSn having a low crystallization temperature was used for the recording layer 26 of the user-rewritable portion 4h, and TbCo having a Curie temperature of 300 ° C. or higher was used for the recording layer 18 of the user-rewritable portion 6h. For reproduction, the reflectance change is used for the user rewritable portion 4h, and the Kerr effect is used for the user unrewritable portion 6h.
【００３３】[0033]
【発明の効果】本発明は、基板に特殊な処理を施すこと
なく、極めて容易にパーシャルＲＯＭを達成できる光記
録媒体を提供できる。Industrial Applicability The present invention can provide an optical recording medium which can very easily achieve a partial ROM without subjecting the substrate to special treatment.
【００３４】ユーザにソフトウエアを販売したい業者
は、大量生産された本発明の光記録媒体を入手し、市販
装置に少し手を加えただけの安価な専用装置を用いて所
望のソフトウエアをＲＯＭ領域に記録することができ、
ユーザサイドではたとえ誤った操作をしても購入したソ
フトウエアを消失することはない。A trader who wants to sell software to users obtains the mass-produced optical recording medium of the present invention, and ROMs the desired software by using an inexpensive dedicated device with a slight modification to the commercially available device. Can be recorded in the area,
On the user side, purchased software will not be lost even if an incorrect operation is performed.
【００３５】また、プロテクトプログラムを販売するソ
フトウエアにあらかじめ仕込んでおけば、不正コピーを
防止することができ、ソフトウエアの著作権を有効に保
護することができる。Further, if the protect program is pre-loaded in the software to be sold, illegal copying can be prevented and the copyright of the software can be effectively protected.
【図１】本発明の第１実施例を示す図である。FIG. 1 is a diagram showing a first embodiment of the present invention.
【図２】本発明の第２実施例を示す図である。FIG. 2 is a diagram showing a second embodiment of the present invention.
【図３】本発明の第３実施例を示す図である。FIG. 3 is a diagram showing a third embodiment of the present invention.
【図４】本発明の第４実施例を示す図である。FIG. 4 is a diagram showing a fourth embodiment of the present invention.
【図５】本発明の第５実施例を示す図である。FIG. 5 is a diagram showing a fifth embodiment of the present invention.
【図６】本発明の第６実施例を示す図である。FIG. 6 is a diagram showing a sixth embodiment of the present invention.
【図７】本発明の第７実施例を示す図である。FIG. 7 is a diagram showing a seventh embodiment of the present invention.
【図８】本発明の第８実施例を示す図である。FIG. 8 is a diagram showing an eighth embodiment of the present invention.
２Ａ〜２Ｉ 光記録媒体 ４ａ〜４ｉ ＲＡＭ部 ６ａ〜６ｉ ＲＯＭ部 ８ ポリカーボネート基板 １２，１８，２０，２６，３０ 記録層 2A to 2I Optical recording medium 4a to 4i RAM section 6a to 6i ROM section 8 Polycarbonate substrate 12, 18, 20, 26, 30 Recording layer
Claims (7)
体において、 媒体製造者及び／又はソフトウェア提供者は情報の記
録、再生及び消去が可能であるがユーザの使用する記録
再生装置では記録された情報の再生のみが可能なＲＯＭ
部と、 ユーザの使用する記録再生装置で情報の記録、再生及び
消去が可能なＲＡＭ部とを有することを特徴とする光記
録媒体。1. In an optical recording medium capable of recording and reproducing information by light, a medium manufacturer and / or a software provider can record, reproduce and erase information, but the information is recorded by a recording and reproducing apparatus used by a user. ROM that can only play back information
An optical recording medium comprising: a recording medium and a RAM portion capable of recording, reproducing and erasing information by a recording and reproducing device used by a user.
り、前記ＲＯＭ部の磁性層はユーザの使用する記録再生
装置で昇温可能な温度よりも高いキュリー温度を有して
おり、前記ＲＡＭ部の磁性層はユーザの使用する記録再
生装置で昇温可能な温度と概略同等か又はそれ以下のキ
ュリー温度を有していることを特徴とする請求項１記載
の光記録媒体。2. The optical recording medium is a magneto-optical recording medium, and the magnetic layer of the ROM portion has a Curie temperature higher than a temperature that can be raised by a recording / reproducing apparatus used by a user, and the RAM The optical recording medium according to claim 1, wherein the magnetic layer has a Curie temperature substantially equal to or lower than a temperature at which a recording / reproducing apparatus used by a user can raise the temperature.
生装置で昇温可能な温度よりも高い記録温度を有する追
記型光記録媒体から構成され、前記ＲＡＭ部はキュリー
温度がユーザの使用する記録再生装置で昇温可能な温度
と概略同等か又はそれ以下の磁性層を有する光磁気記録
媒体から構成されることを特徴とする請求項１記載の光
記録媒体。3. The ROM section is composed of a write-once type optical recording medium having a recording temperature higher than a temperature which can be raised by a recording / reproducing apparatus used by the user, and the RAM section is recorded by a Curie temperature used by the user. The optical recording medium according to claim 1, wherein the optical recording medium comprises a magneto-optical recording medium having a magnetic layer whose temperature is substantially equal to or lower than the temperature that can be raised by the reproducing apparatus.
層の結晶化温度がユーザの使用する記録再生装置で昇温
可能な温度よりも高く、前記ＲＡＭ部の記録層はユーザ
の使用する記録再生装置で昇温可能な温度以下の結晶化
温度を有する相変化光記録媒体から構成されることを特
徴とする請求項１記載の光記録媒体。4. In the optical recording medium, the crystallization temperature of the recording layer of the ROM section is higher than the temperature that can be raised by the recording / reproducing apparatus used by the user, and the recording layer of the RAM section is used by the user. The optical recording medium according to claim 1, wherein the optical recording medium is composed of a phase change optical recording medium having a crystallization temperature equal to or lower than a temperature at which the recording / reproducing apparatus can raise the temperature.
生装置で昇温可能な温度よりも高い記録温度を有する追
記型光記録媒体から構成され、前記ＲＡＭ部はユーザの
使用する記録再生装置で昇温可能な温度以下の結晶化温
度を有する相変化光記録媒体から構成されることを特徴
とする請求項１記載の光記録媒体。5. The ROM section is composed of a write-once type optical recording medium having a recording temperature higher than a temperature that can be raised by a recording / reproducing apparatus used by the user, and the RAM section is a recording / reproducing apparatus used by the user. The optical recording medium according to claim 1, wherein the optical recording medium comprises a phase change optical recording medium having a crystallization temperature equal to or lower than a temperature at which the temperature can be raised.
用する記録再生装置で昇温可能な温度よりも高い結晶化
温度を有する相変化光記録媒体から構成され、前記ＲＡ
Ｍ部はその磁性層がユーザの使用する記録再生装置で昇
温可能な温度と概略同等かそれ以下のキュリー温度を有
する光磁気記録媒体から構成されることを特徴とする請
求項１記載の光記録媒体。6. The ROM section is composed of a phase change optical recording medium whose recording layer has a crystallization temperature higher than a temperature that can be raised by a recording / reproducing apparatus used by a user.
2. The optical recording medium according to claim 1, wherein the M portion is composed of a magneto-optical recording medium whose magnetic layer has a Curie temperature substantially equal to or lower than the temperature that can be raised by the recording / reproducing apparatus used by the user. recoding media.
用する記録再生装置で昇温可能な温度よりも高いキュリ
ー温度を有する光磁気記録媒体から構成され、前記ＲＡ
Ｍ部はその記録層がユーザの使用する記録再生装置で昇
温可能な温度以下の結晶化温度を有する相変化光記録媒
体から構成されることを特徴とする請求項１記載の光記
録媒体。7. The ROM section is composed of a magneto-optical recording medium whose magnetic layer has a Curie temperature higher than a temperature that can be raised by a recording / reproducing apparatus used by a user.
The optical recording medium according to claim 1, wherein the M portion is composed of a phase change optical recording medium whose recording layer has a crystallization temperature equal to or lower than a temperature at which a recording / reproducing apparatus used by a user can raise the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18452194A JP3522342B2 (en) | 1994-08-05 | 1994-08-05 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18452194A JP3522342B2 (en) | 1994-08-05 | 1994-08-05 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0850736A true JPH0850736A (en) | 1996-02-20 |
| JP3522342B2 JP3522342B2 (en) | 2004-04-26 |
Family
ID=16154662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18452194A Expired - Fee Related JP3522342B2 (en) | 1994-08-05 | 1994-08-05 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3522342B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081191A (en) * | 1998-07-31 | 2000-06-27 | Code 3, Inc. | Light bar having multiple levels and multiple rows of lights and having end extensions |
| US6140918A (en) * | 1998-07-31 | 2000-10-31 | Code 3, Inc. | Light bar having multiple levels and multiple rows of lights and having end extensions |
-
1994
- 1994-08-05 JP JP18452194A patent/JP3522342B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081191A (en) * | 1998-07-31 | 2000-06-27 | Code 3, Inc. | Light bar having multiple levels and multiple rows of lights and having end extensions |
| US6140918A (en) * | 1998-07-31 | 2000-10-31 | Code 3, Inc. | Light bar having multiple levels and multiple rows of lights and having end extensions |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3522342B2 (en) | 2004-04-26 |
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