JPS59210545A - Information recording medium - Google Patents
Information recording mediumInfo
- Publication number
- JPS59210545A JPS59210545A JP59078494A JP7849484A JPS59210545A JP S59210545 A JPS59210545 A JP S59210545A JP 59078494 A JP59078494 A JP 59078494A JP 7849484 A JP7849484 A JP 7849484A JP S59210545 A JPS59210545 A JP S59210545A
- Authority
- JP
- Japan
- Prior art keywords
- film
- thin film
- information recording
- information
- recording medium
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2531—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising glass
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/2585—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/2595—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on gold
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は高品質の情報を光学的に記録再生する情報記録
媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an information recording medium that optically records and reproduces high-quality information.
従来、光学的にビデオ情報、オーディオ情報あるいはデ
ィジタル情報を実時間で記録し即時再生する光デイスク
メモリが知られている。この光デイスクメモリに用いら
れる情報記録媒体の構造は第１図に示す如く、ガラスも
しくはプラスチックの基板１上に記録材料薄膜２が形成
されている。記録材料薄膜としては通常Ａｕ、Ａｊ、Ｏ
ｒ、Ｂｉ等の金へＳ
層の薄膜あるいは、遍−’１” ｅ −Ｓ ｅ等のカル
コゲンガラス材料薄膜が、厚さ２０〜１００ ｎｍで用
いられており、この薄膜上ｔこレーザ光束を直径０．５
〜２μｍの微小スポットとして絞り込むことによって熱
的に穴（孔）３をあけ、穴の分布によって情報を記録す
る。Conventionally, optical disk memories have been known that optically record video information, audio information, or digital information in real time and reproduce it immediately. The structure of the information recording medium used in this optical disk memory is as shown in FIG. 1, in which a thin film 2 of recording material is formed on a substrate 1 made of glass or plastic. The recording material thin film is usually Au, Aj, O.
A thin film of gold to S layer such as R, Bi or a chalcogen glass material thin film of 20 to 100 nm thick is used, and the laser beam is transmitted on this thin film. Diameter 0.5
Holes (holes) 3 are formed thermally by narrowing down to a minute spot of ~2 μm, and information is recorded based on the distribution of the holes.
情報を読み出す時は第２図に示す如き光学系を用いる。When reading out information, an optical system as shown in FIG. 2 is used.
即ちレーザ光源４からのレーザ光束５は情報記録時の約
１／１０の出力（１〜２ｍＷ）を有し、レンズ６によっ
て平行光束となった後半透明鏡７．絞り込みレンズ８に
よって穴３を有する記録材料薄膜２に導ひかれる。薄膜
２に導びかれる。薄膜２からの反射光束は光検出器９に
導びかれ１反射光振幅の大小によって穴３が検出され出
力信号１０となる。しかしなからこの種の情報記録媒体
においては、記録材料薄膜２上の微細な凹凸によってレ
ーザ光が散乱され出力信号１０中に雑音が混入してしま
いＳ／Ｎを低下させるという問題点がある。この問題点
を解決するためには、第３図に示すよλ
うに基板１１上ｌこ深さ−（２ｍ＋１ ）、ｍ＝０ 。That is, the laser beam 5 from the laser light source 4 has an output (1 to 2 mW) that is approximately 1/10 that of information recording, and is converted into a parallel beam by the lens 6 on the rear transparent mirror 7. A recording material thin film 2 having holes 3 is guided by a diaphragm lens 8 . guided by the thin film 2. The reflected light flux from the thin film 2 is guided to a photodetector 9, and the hole 3 is detected depending on the magnitude of the reflected light amplitude, resulting in an output signal 10. However, this type of information recording medium has a problem in that the laser light is scattered by the fine irregularities on the recording material thin film 2, and noise is mixed into the output signal 10, reducing the S/N ratio. In order to solve this problem, as shown in FIG. 3, the depth above the substrate 11 is -(2m+1), m=0.
１．２・・・・・・（λは再生用レーザ波長）の深さで
穴１３を形成し、その上に反射膜１２を有する形で情報
を記録し、この反射膜１２からの反射レーザ光束を２個
の光検出器で検出し、その差動出力として再生信号を得
れば良いことが知られている。1.2 A hole 13 is formed at a depth of (λ is the reproduction laser wavelength), information is recorded with a reflective film 12 on the hole 13, and the reflected laser from this reflective film 12 is It is known that the light flux may be detected by two photodetectors and a reproduced signal may be obtained as the differential output thereof.
しかし第１図に示すような情報記録媒体では、第３図の
如き情報記録を行なうことが出来ず、再生信号のＳ／Ｎ
ｉ向上させることは出来なかった。However, with the information recording medium shown in Fig. 1, information recording as shown in Fig. 3 cannot be performed, and the S/N of the reproduced signal is
i could not improve it.
本発明は上記問題点を解決し、高８／Ｎの実時間記録再
生型光ディスクメモリヲ提供するものである。The present invention solves the above problems and provides a high 8/N real-time recording and reproducing type optical disk memory.
かかる目的を達成するため本発明は基鈑と、この上に形
成された反射層と、この反射層上ｔこ形成された光透過
性物質と−１この物質上に形成された金属薄膜からなる
こと’Ｆ％徴とする。In order to achieve this object, the present invention comprises a base plate, a reflective layer formed on the base plate, a light transmitting material formed on the reflective layer, and a metal thin film formed on the material. This is called 'F% sign.
以下９本発明を実施例によって説明する。 The present invention will be explained below with reference to nine examples.
第４図は本発明の第１の実施例であり１本発明の情報記
録媒体の構造を示すものである。ガラスＴｊ 、Ｍｏ、
Ｔａ、’ｌ’ｅ、８ｂ、Ｓｊ 、Ｇｅ、Ｓｎ、Ｐｂ。FIG. 4 is a first embodiment of the present invention, and shows the structure of an information recording medium of the present invention. Glass Tj, Mo,
Ta, 'l'e, 8b, Sj, Ge, Sn, Pb.
Ｉｎ等の金属、半導体の少なくとも一者を主として含む
薄膜１４（好ましい厚さ５ｉｍ〜１μｍ）が形成される
、特に好ましい（半）金属は、毒性が低く熱伝導率が低
いＢｉである。またはＡｓ−Ｔｅ−８ｅ等のカルコゲン
ガラス材料の薄膜（あるいはこれらの複合膜、たとえば
Ｂ１膜の少なくとも片側にＡＪ等の薄い安定な金属膜を
設けたもの）による反射換型４が形成さゎており、その
上に元Ｍｏｂ、、５ｎＯｘ（０＜Ｘ≦２）ＩｎＯｘ （
０＜Ｘ≦−＞）、Ｔｉ０ｘ（ＯくＸ≦２ ）、Ｔｅ０ｘ
（０＜Ｘ≦２）、Ｇｅ０ｘ（０（Ｘ≦２）などの組成の
酸化物、およそＭｇＦ２．ＢｉＦｘ（０＜Ｘ≦３） 。A particularly preferred (semi-)metal on which the thin film 14 (preferably thickness 5 im to 1 μm) mainly containing at least one of a metal such as In and a semiconductor is formed is Bi, which has low toxicity and low thermal conductivity. Alternatively, a reflective conversion type 4 is formed using a thin film of a chalcogen glass material such as As-Te-8e (or a composite film of these, for example, a film in which a thin stable metal film such as AJ is provided on at least one side of the B1 film). On top of that is the original mob, 5nOx (0<X≦2)InOx (
0<X≦->), Ti0x (Ox≦2), Te0x
(0 <
０ｅＦ３．ＬｉＦ、０ａＦ２などＩ組成の弗化物、およ
そＺｎ８ 、Ｉｎ２Ｓ３，８ｂ２８８．ＳｎＳ、ＧｅＳ
。0eF3. Fluorides of I composition such as LiF, 0aF2, approximately Zn8, In2S3, 8b288. SnS, GeS
.
Ｇａ２Ｓ３などの組成の硫化物、低重合度ポリエチレン
、パラフィン、カルナバロウ、ミツロウ、脂肪酸ビスア
ミド、ベヘン酸などの真空蒸着可能な有機物、ケトン樹
脂アルキルフェノール樹脂、ロジン変性マレイン酸樹脂
などの塗布可能な有機物等）等の光透過性物質のうち少
なくとも一者を主として含む単一または複合［１５、さ
らにその上にＡｕ、ＡＩ、Ｏｒ、Ｈｉ 、Ｔｅ、Ａｓ
、Ｓｂ、８ｉ 、Ｇｅ。Sulfides with compositions such as Ga2S3, low polymerization degree polyethylene, paraffin, carnauba wax, beeswax, fatty acid bisamides, organic substances that can be vacuum deposited such as behenic acid, organic substances that can be coated such as ketone resins, alkylphenol resins, rosin-modified maleic acid resins, etc.) [15] A single or composite material mainly containing at least one light-transmitting substance such as Au, AI, Or, Hi, Te, As
, Sb, 8i, Ge.
Ｋ
Ｓｎ、Ｐｂ、Ｉｎ、Ａｇ、Ｏｕ、＆ａ、Ｐｄ、Ｎｉ 、
Ｃｏ。K Sn, Pb, In, Ag, Ou, &a, Pd, Ni,
Co.
Ｆｅ、Ｔｉ、Ｍｏ、Ｔａ、等の金属や半導体のうちの少
なくとも一者を主として含む＊［、あるいはＡｓ−、Ｔ
ｅ７Ｓｅ等のカルコゲンガラス材料やＳ ｂ Ｓｘ （
０＜Ｘ＜ ２ ）などの低酸化物や低硫化物等を主とし
て含む記録材料薄膜２が形成されている。光透過性物質
膜１５の厚さをｄ７．入射レー゛′ザ波長λに対する屈
折率をｎとし、記録材料薄膜２の厚さをｄＲとすると。Mainly containing at least one of metals and semiconductors such as Fe, Ti, Mo, Ta, etc. *[or As-, T
Chalcogen glass materials such as e7Se and S b Sx (
A recording material thin film 2 mainly containing low oxides, low sulfides, etc. such as 0<X<2) is formed. The thickness of the light-transmitting material film 15 is d7. Let n be the refractive index with respect to the incident laser wavelength λ, and let dR be the thickness of the recording material thin film 2.
ｄＲ＋ｄ、ｎ二ｓ （２ｍ ＋１ ）
ｍ＝ｏ、ｌ、２．・・・・・・
は許すことを示す。たとえばｄＢ＝２０ｎｍλ＝８００
ｎｍとし、光透過性物質膜として有機物膜（たとえばケ
トン樹脂、 ｎ＝ｌ。５）を用いると、ｍ＝Ｑとしてｄ
Ｔユ５３ ｎｍとなる。この場合１反射膜としては厚さ
５０ ｎｍのＢｊ、記録材料薄膜としては膜厚方向平均
組成Ａｓ Ｔｅ ５ｅ１５ ７７ ８
のものを用いた。これらの薄膜の形成方法は真空蒸着ま
たは塗布が好ましいが、スパッタリング。dR+d, n2s (2m +1) m=o, l, 2. ... means to forgive. For example dB=20nmλ=800
nm, and if an organic film (for example, ketone resin, n=l.5) is used as the light-transmissive material film, m=Q and d.
Tyu is 53 nm. In this case, the first reflective film used was Bj with a thickness of 50 nm, and the recording material thin film used had an average composition in the thickness direction of As Te 5e15 77 8 . The method for forming these thin films is preferably vacuum deposition or coating, but sputtering is preferred.
グロー放電、ｃｖＤなとでもよい。今、この情報記録媒
体に情報を記録すると第４図に示す如く穴（孔）３があ
く。穴（孔）３があくことによって。Glow discharge or CVD may also be used. Now, when information is recorded on this information recording medium, holes 3 are created as shown in FIG. By making hole 3.
下の反射膜１４が情報再生時に入射するレーザ光束ｆこ
さらさゎることｆこなり第３図に示したものと尋価的な
深さがおよそλ／８ （２ｍ＋１ ）、ｍ−〇、１，２
．・・・・・・の凹凸情報が記録されたことになる。第
５図は本発明の情報記録媒体への情報記録再生に用いら
れる光学系を示すものである。半導体レーザ等のレーザ
光源４から出たレーザ光束５はレンズ６によって平行光
束となり半透明鏡７および絞り込みレンズ８１こよって
記録材料薄膜２上に直径１〜２μｍの微小スポットとし
て絞り込まれ、穴３を形成する。情報再生時には、２か
らられる。再生信号を差動出力として得ているので記録
材料薄膜２上の凹凸による雑音成分は相殺され、高Ｓ／
Ｎの再生信号を得ることが可能になる０次に本発明の第
２の実施例を第６図に示す。基＠１の上（こはあらかじ
めアドレス用信号１６．及び情報記録用エリア１７（プ
リグループと称する）が深さおよそλ／８（２ｍ＋１）
、（ｍ＝０．１゜２・・・）の凹凸の形で形成されてい
る。このような基板をつくるには、従来の光ビデオディ
スクのレプリカ作製と同様のプロセスを用いればよい。When the lower reflective film 14 is reproducing information, the laser beam incident thereon is slightly swung, so that the approximate depth is approximately λ/8 (2m+1), m-〇, 1 as shown in Fig. 3. ,2
．． This means that the unevenness information of . . . is recorded. FIG. 5 shows an optical system used for recording and reproducing information on the information recording medium of the present invention. A laser beam 5 emitted from a laser light source 4 such as a semiconductor laser is turned into a parallel beam by a lens 6, and is focused by a semi-transparent mirror 7 and a diaphragm lens 81 onto the recording material thin film 2 as a minute spot with a diameter of 1 to 2 μm. Form. When reproducing information, it starts from 2. Since the reproduced signal is obtained as a differential output, noise components due to unevenness on the recording material thin film 2 are canceled out, resulting in a high S/
FIG. 6 shows a second embodiment of the present invention of zero order, which makes it possible to obtain N reproduced signals. On base @1 (in advance, address signal 16. and information recording area 17 (referred to as pre-group) are approximately λ/8 (2m+1) deep.
, (m=0.1°2...). To manufacture such a substrate, a process similar to that used for manufacturing a replica of a conventional optical video disk may be used.
たとえば、化学強化ガラス、アクリル樹脂（ＰＭＭＡ）
、Ａｓ樹脂、ポリカーボネートなどの硬い板の上に紫外
線硬化樹脂によって薄いレプリカ層を形成したものが好
ましい。基板１の上に反射膜１４、光透過性物質膜１５
．記録材料薄膜２が形成されておりこれらの６膜の好ま
しい組成および膜厚は、第１の実施例と同様である。本
実施例の情報記録媒体は、主として、ディジタル情報の
記録再生用に用いられる。ディジタル情報記録には、情
報記録媒体上の情報記録トラックがアドレス指定され、
アドレス信号１６を再生することによって記録トラック
を確認後、情報記録用エリア１７上に情報が穴ＩＪＬ）
１３の形で記録される。アドレス信号１６．及び穴１３
がおよそλ／８ （２ｍ＋１ ）、 （ｍ＝ｏ 。For example, chemically strengthened glass, acrylic resin (PMMA)
Preferably, a thin replica layer is formed using an ultraviolet curing resin on a hard plate such as , As resin, or polycarbonate. A reflective film 14 and a light-transmitting material film 15 are formed on the substrate 1.
．． A recording material thin film 2 is formed, and the preferred composition and film thickness of these six films are the same as in the first embodiment. The information recording medium of this embodiment is mainly used for recording and reproducing digital information. Digital information recording involves addressing information recording tracks on an information recording medium;
After confirming the recording track by reproducing the address signal 16, information is placed on the information recording area 17 (IJL)
It is recorded in the form of 13. Address signal 16. and hole 13
is approximately λ/8 (2m+1), (m=o.
１．２．・・・・・・）の深さになっているため、第５
図に示した２ケの光検出器によって再生信号を得られる
。さらに、情報記録エリア１７の深さもあらかじめλ／
８（２ｍ＋１）となっているため、情報記録再生時に１
７をレーザスポットが追跡するためのトラッキング信号
も同時に得られる０従来、この種のプリグループを有す
る情報記録媒体は文献″Ｔｅｎ Ｂ１１１ｉｏｎ ｂｉ
ｔｓ ｏｎ ｄｉｓｋ ：Ｉ ＢＢＥ ｓｐｅｃｔｒｕ
ｍ（１９７９）にあるようをこアドレス信号の深さがλ
／４、情報記録エリアの深さがλ／８と２段になってい
たため作製が困難とされていたが、本発明の情報記録媒
体では、およそλ／８（２ｍ＋１）の−通りの深さでよ
いため１作製の工程も大幅に簡素化される利点を有して
いる。1.2. ), the fifth
Reproduction signals can be obtained by the two photodetectors shown in the figure. Furthermore, the depth of the information recording area 17 is set in advance by λ/
8 (2m+1), so when recording and reproducing information, 1
A tracking signal for the laser spot to track 7 can also be obtained at the same time.0 Conventionally, an information recording medium having this kind of pre-group is described in the document "Ten B111ion bi
ts on disk:I BBE spectrum
m (1979), the depth of this address signal is λ
/4, and the depth of the information recording area was λ/8 in two stages, which made it difficult to manufacture, but the information recording medium of the present invention has a depth of about λ/8 (2m + 1). This has the advantage that the manufacturing process can be greatly simplified.
なお、第６図ｆこおいて５反射膜１４と記録材料薄膜２
の位置を入れかえることによって、基板１側からのレー
ザ光束入射に対して使用可能な情報記も
録媒体を得ることだ出来る。この場合、基板ｌの厚さは
通常１ｍｍ程度、記録材料薄膜２の厚さは２〜５０ ｎ
ｍ程度となる。特に３〜１５ｎｍの範囲、たとえば１２
ｎｍが好ましい０反射膜１４の上に、更に保護層または
／および保護板を設けるのが好ましい。たとえば保護層
はエポキシ系接着剤、保護板は、厚さ１ｍｍの化学強化
ガラス板とする。In addition, in FIG. 6f, 5 reflective film 14 and recording material thin film 2
By replacing the positions of the two, it is possible to obtain a recording medium that can also record information that can be used for laser beam incidence from the substrate 1 side. In this case, the thickness of the substrate l is usually about 1 mm, and the thickness of the recording material thin film 2 is 2 to 50 nm.
It will be about m. Particularly in the range 3-15 nm, e.g.
It is preferable to further provide a protective layer and/or a protective plate on the 0-reflection film 14, which preferably has a thickness of nm. For example, the protective layer is an epoxy adhesive, and the protective plate is a chemically strengthened glass plate with a thickness of 1 mm.
以上示したように、本発明の情報記録媒体を用いること
によって光デイスクメモリにおいて、高Ｓ／Ｎの再生信
号が得られるとともに容易Ｆこプリグループディスクを
作製することが可能となる。As shown above, by using the information recording medium of the present invention, it is possible to obtain a reproduction signal with a high S/N ratio in an optical disk memory, and also to easily produce an F-column disk.
第１図は、従来の情報記録媒体の構成を示す断面図、第
２図は、第１図の媒体から信号を再生するための光学系
の構成の概略を示す図、第３図は従来の他の情報記録媒
体の構成を示す断面図、第４図は１本発明の情報記録媒
体の一実施例の構成を示す断面図、第５図は、第４図に
示す媒体から信号を再生するための光学系の概略構成を
示す図。
第６図は１本発明の他の実施例の構成を示す図である。
１・・・基板、２・・金属薄膜、１４・・・光透過性物
質、１５ 反射層。
兎 １ 図
第 Ｚ 図
第 ３ 図FIG. 1 is a sectional view showing the configuration of a conventional information recording medium, FIG. 2 is a diagram schematically showing the configuration of an optical system for reproducing signals from the medium shown in FIG. 4 is a sectional view showing the structure of an embodiment of the information recording medium of the present invention; FIG. 5 is a sectional view showing the structure of another information recording medium; FIG. The figure which shows the schematic structure of the optical system for. FIG. 6 is a diagram showing the configuration of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Metal thin film, 14... Light-transmitting substance, 15 Reflective layer. Rabbit 1 Figure Z Figure 3
Claims (1)
層上に形成された光透過性物質と、この物質上に形成さ
れた金属薄膜とからなる情報記録媒体。1. An information recording medium comprising a substrate, a reflective layer formed on the substrate, a light-transmitting material formed on the reflective layer, and a metal thin film formed on the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078494A JPS59210545A (en) | 1984-04-20 | 1984-04-20 | Information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078494A JPS59210545A (en) | 1984-04-20 | 1984-04-20 | Information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59210545A true JPS59210545A (en) | 1984-11-29 |
Family
ID=13663521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59078494A Pending JPS59210545A (en) | 1984-04-20 | 1984-04-20 | Information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59210545A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253401A (en) * | 1975-09-30 | 1977-04-30 | Rca Corp | Optical record reproducer |
| JPS53120506A (en) * | 1977-03-28 | 1978-10-21 | Rca Corp | Information recorder |
| JPS53122403A (en) * | 1977-03-28 | 1978-10-25 | Rca Corp | Information recorder |
| JPS54130102A (en) * | 1978-03-16 | 1979-10-09 | Philips Nv | Method of writing information* recording carrier* recorded record carrier* and information writing and reading device |
-
1984
- 1984-04-20 JP JP59078494A patent/JPS59210545A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253401A (en) * | 1975-09-30 | 1977-04-30 | Rca Corp | Optical record reproducer |
| JPS53120506A (en) * | 1977-03-28 | 1978-10-21 | Rca Corp | Information recorder |
| JPS53122403A (en) * | 1977-03-28 | 1978-10-25 | Rca Corp | Information recorder |
| JPS54130102A (en) * | 1978-03-16 | 1979-10-09 | Philips Nv | Method of writing information* recording carrier* recorded record carrier* and information writing and reading device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5966367A (en) | Optical information recording medium | |
| KR100894972B1 (en) | Optical recording medium | |
| TWI246683B (en) | High-density readable only optical disk | |
| JPH0428032A (en) | Optical information recording medium | |
| EP1184858A2 (en) | Optical information recording medium and method for optical recording, reproducing and erasing information | |
| JP3163302B2 (en) | Optical information recording medium and information recording / reproducing method | |
| JPH02168446A (en) | Optical information recording medium | |
| JP3199713B2 (en) | How to record and play back information | |
| JPH0528535A (en) | Optical recording medium | |
| JPS59210545A (en) | Information recording medium | |
| JP3066088B2 (en) | Optical information recording medium and information recording / reproducing method | |
| JP2521178B2 (en) | Optical recording medium disk | |
| JP2921571B2 (en) | Optical information recording medium | |
| JPH052769A (en) | Optical information recording medium | |
| JP2512044B2 (en) | Optical recording medium and optical recording method | |
| JP2512043B2 (en) | Optical recording medium and optical recording method | |
| US5448541A (en) | Method of use for an optical recording disk with a dye-containing recording layer and a tracking guide groove | |
| CN101430899A (en) | Method and apparatus for recording/reproducing optical information | |
| JPH1031844A (en) | Maltilayered optical information medium | |
| JPH01151026A (en) | Optical recording medium and optical recording method | |
| JP3138506B2 (en) | Write-once optical recording medium and recording / reproducing method thereof | |
| JP3138514B2 (en) | Information optical recording medium and recording / reproducing method thereof | |
| JPH0443330B2 (en) | ||
| JP3865487B2 (en) | Optical recording medium | |
| JP2000155984A (en) | Optical information storage medium and method for recording/reproducing information |