JPH0363519B2 - - Google Patents
Info
- Publication number
- JPH0363519B2 JPH0363519B2 JP59220811A JP22081184A JPH0363519B2 JP H0363519 B2 JPH0363519 B2 JP H0363519B2 JP 59220811 A JP59220811 A JP 59220811A JP 22081184 A JP22081184 A JP 22081184A JP H0363519 B2 JPH0363519 B2 JP H0363519B2
- Authority
- JP
- Japan
- Prior art keywords
- tiag
- recording
- optical recording
- recording film
- cracks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 10
- 239000010408 film Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001552 radio frequency sputter deposition Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は光学的な記録媒体に係り、特にレーザ
光等の光及び熱エネルギーを用いて情報を高密度
に記録し、且つ再生可能な光学記録媒体に関す
る。[Detailed description of the invention] (a) Industrial application field The present invention relates to an optical recording medium, and in particular, a medium that records information at high density using light such as a laser beam and thermal energy, and that is reproducible. Related to optical recording media.
(ロ) 従来の技術
レーザ光等のエネルギービームを照射して、基
板上の金属等の薄膜を溶融あるいは蒸発させ、ピ
ツトを形成する方式の記録材料としては感度が高
く、基板上の記録層の膜厚が均一であり化学、物
理的にも安定で長期にわたつて記録再生ができる
ものでなければならない。(b) Prior art The recording material uses an energy beam such as a laser beam to melt or evaporate a thin film of metal or the like on the substrate to form pits, and is highly sensitive. It must have a uniform film thickness, be chemically and physically stable, and be capable of recording and reproducing over a long period of time.
例えば、日経エレクトロニクス1982年１月４日
号第86頁以下、「画像フアイルに使われ出した光
デイスク・メモリ」なず記事等に開示されている
如く、現在この方式の記録材料としてはテルル
（Te）が一般的に用いられている。Teは熱伝導
率が低く、光吸収係数が大きく、低融点であるの
で良好な形状のピツト（孔）が形成でき、従つて
感度の良い記録膜が得られるが、空気中の水分に
よつて容易に酸化され、光学的に透明な二酸化テ
ルル（TeO2）に変化するため信号が再生できな
くなり、長期間の情報の記録保存が難しい。すな
わち記録寿命が短いという欠点を有している。 For example, as disclosed in the January 4, 1982 issue of Nikkei Electronics, page 86 et seq., "Optical disk memory used for image files," tellurium ( Te) is commonly used. Since Te has a low thermal conductivity, a large optical absorption coefficient, and a low melting point, it is possible to form well-shaped pits (holes), and therefore a recording film with good sensitivity can be obtained. It is easily oxidized and turns into optically transparent tellurium dioxide (TeO 2 ), making it impossible to reproduce signals and making it difficult to record and preserve information for long periods of time. That is, it has the disadvantage of short recording life.
そこで、本出願人は特願昭59−41167号におい
て、上述の如く記録寿命が短いという欠点を抑制
し、長期間にわたつてて安定した情報の記録及び
再生を可能にする改良された光学記録媒体とし
て、記録膜を［Te（100−ｘ−ｙ−ｚ）・Tix・
Agy・Sez、ただしｘ＋ｙ＋ｚ＜15；ｘ、ｙ、ｚ
はモル％］からなる膜にて形成することが出願し
ている。 Therefore, in Japanese Patent Application No. 59-41167, the present applicant proposed an improved optical recording system that suppresses the disadvantage of short recording life as described above and enables stable recording and reproduction of information over a long period of time. As a medium, the recording film is [Te(100-x-y-z)・Tix・
Agy・Sez, where x+y+z<15; x, y, z
The application has been filed to form a film consisting of mol %].
(ハ) 発明が解決しようとする問題点
ところで、光学記録媒体は、アクリル、ポリカ
ーボネイト等の透明樹脂を基板とし、該基板上に
記録膜を形成した構成である。従つて、基板の熱
膨張の影響により、記録膜にクラツクが発生す
る。(c) Problems to be Solved by the Invention Incidentally, an optical recording medium has a structure in which a transparent resin such as acrylic or polycarbonate is used as a substrate, and a recording film is formed on the substrate. Therefore, cracks occur in the recording film due to the influence of thermal expansion of the substrate.
上述のTe単体の記録膜においては、温度60℃
湿度90％の雰囲気中に放置後、わずか１日でクラ
ツクが発生し、また上述の改良された光学記録媒
体においても、１週間後にはクラツクが発生し
た。 In the above-mentioned recording film made of Te alone, the temperature is 60℃.
Cracks occurred in just one day after being left in an atmosphere with a humidity of 90%, and cracks also occurred after one week even in the above-mentioned improved optical recording medium.
こうしてクラツクの発生は、情報の記録及び再
生に大きな悪影響を及ぼし、光学記録媒体の長寿
命化を妨げる。 In this way, the occurrence of cracks has a large adverse effect on the recording and reproduction of information, and prevents the longevity of the optical recording medium.
本発明の目的は、改良された光学記録媒体が有
する優れた特性、即ち長寿命、適宜のＳ／Ｎ
（Ｃ／Ｎ）の大きさを損うことなく、長期にわた
つてクラツクの発生を防止することにある。 The purpose of the present invention is to achieve the excellent properties of an improved optical recording medium, namely, long life and suitable S/N.
The purpose is to prevent the occurrence of cracks over a long period of time without impairing the (C/N).
(ニ) 問題点を解決するための手段
本発明の光学記録媒体は、基板上に［Te（100
−ｘ−ｙ−ｚ）・（TiAg）ｘ・Sey・Inz、ただし
10≦ｚ≦20、ｘ＋ｙ＋ｚ＜30；ｘ、ｙ、ｚはモル
％を示す］からなる記録膜を形成したものであ
る。(d) Means for solving the problems The optical recording medium of the present invention has [Te (100
-x-y-z)・(TiAg)x・Sey・Inz, however
10≦z≦20, x+y+z<30; x, y, and z represent mol%].
(ホ) 作用
本発明の光学記録媒体によれば、長期間にわた
つてクラツクの発生を防止し得る。(E) Effect According to the optical recording medium of the present invention, the occurrence of cracks can be prevented for a long period of time.
(ヘ) 実施例
第１図は本発明の一実施例を示す断面斜視図で
ある。記録膜１を内面に形成した透明基板２と保
護板３とが、２つのリング状スペーサ４，５によ
り一定の間隔を空けて固定されている。なお、保
護板３を記録膜を形成した透明基板に変えること
によつて両面記録が可能となる。(f) Embodiment FIG. 1 is a cross-sectional perspective view showing an embodiment of the present invention. A transparent substrate 2 having a recording film 1 formed on its inner surface and a protection plate 3 are fixed at a constant distance by two ring-shaped spacers 4 and 5. Note that double-sided recording becomes possible by replacing the protection plate 3 with a transparent substrate on which a recording film is formed.
透明基板２は、アクリル樹脂、ポリカーボネイ
ト樹脂、ポリメチルメタクリリレート樹脂もしく
はガラス等からなる。 The transparent substrate 2 is made of acrylic resin, polycarbonate resin, polymethyl methacrylate resin, glass, or the like.
記録膜１は、本発明の特徴であり、Te（100−
ｘ−ｙ−ｚ）・（TiAg）ｘ・Sey・Inz（ただし、
10≦ｚ≦20、ｘ＋ｙ＋ｚ＜30）なる組成である。
斯る記録膜１はRFスパツタリング法もしくは蒸
着法等により300〜500Åの膜厚に形成される。 The recording film 1 is a feature of the present invention and is made of Te(100−
x-y-z)・(TiAg)x・Sey・Inz (however,
The composition is 10≦z≦20, x+y+z<30).
The recording film 1 is formed to a thickness of 300 to 500 Å by RF sputtering or vapor deposition.
記録膜の寿命は、温度60℃湿度90％の雰囲気中
で加速試験を行なうことにより推定した。記録膜
はアクリル樹脂系の基板上に約300Åの厚さに形
成したものである。 The life of the recording film was estimated by conducting an accelerated test in an atmosphere at a temperature of 60° C. and a humidity of 90%. The recording film was formed on an acrylic resin substrate to a thickness of about 300 Å.
第２図は、上述の改良された光学記録媒体の記
録膜であるTe89（TiAg）4Se7と本発明の記録膜で
あるTe74（TiAg）4Se7In15との上記雰囲気中にお
ける時間（日）対透過率（相対値）特性を示す。 FIG. 2 shows the relationship between Te 89 (TiAg) 4 Se 7 , which is the recording film of the improved optical recording medium described above, and Te 74 (TiAg) 4 Se 7 In 15 , which is the recording film of the present invention, in the above atmosphere. Time (days) vs. transmittance (relative value) characteristics are shown.
また、第３図は、上記各記録膜について光学記
録媒体（デイスク）の回転数600rpm、記録周波
数1MHzの条件で所望品位の録再特性を満たすた
めに半導体レーザLDに要求されるパワー（デイ
スク面上）とデイスク半径との関係を示す。 Figure 3 also shows the power required for the semiconductor laser LD (disc surface (above) and the disk radius.
各図から明らかなように、本発明の記録膜
Te74（TiAg）4Se7In15は、改良された記録膜とほ
とんど同じ寿命、即ち透過率が20％上昇するのに
30日近くを要し、また半導体レーザLDのパワー
の上限（７〜8mW）の範囲で十分記録再生を行
い得る。 As is clear from each figure, the recording film of the present invention
Te 74 (TiAg) 4 Se 7 In 15 has almost the same lifetime as the improved recording film, i.e. a 20% increase in transmittance, but
It takes nearly 30 days, and sufficient recording and reproduction can be performed within the upper limit of the power of the semiconductor laser LD (7 to 8 mW).
本発明の記録膜Te（100−ｘ−ｙ−ｚ）・
（TiAg）ｘ・Sey・Inzの特徴は、クラツクの発
生を防止することである。Te89（TiAg）4Se7と
Te74（TiAg）4Se7In15との記録膜を夫々上述の雰
囲気中に放置した結果、Te89（TiAg）4Se7におい
ては、放置開始後１週間で放射状のクラツクが発
生したのに対し、Te74（TiAg）4Se7In15おいては、
30日経過後もクラツクは発生しない。斯るクラツ
ク発生の防止効果はTe89−ｚ（TiAg）4Se7Inzの組
成の記録膜の10≦ｚの範囲で見られる。 Recording film Te (100-xy-z) of the present invention
(TiAg)x・Sey・Inz is characterized by its ability to prevent cracks from occurring. Te 89 (TiAg) 4 Se 7 and
As a result of leaving the recording films of Te 74 (TiAg) 4 Se 7 In 15 in the above-mentioned atmospheres, radial cracks occurred in Te 89 (TiAg) 4 Se 7 within a week after the start of storage, but On the other hand, for Te 74 (TiAg) 4 Se 7 In 15 ,
Cracks do not occur even after 30 days have passed. Such a crack prevention effect can be seen in the range of 10≦z in a recording film having a composition of Te 89 -z(TiAg) 4 Se 7 Inz.
一方、第４図は、Te89−ｚ・（TiAg）4Se7Inzに
おけるInの含有量（モル％）対再生信号のＣ／Ｎ
（dB）との関係を示す。なお、斯る関係はデイス
ク回転数700rpm、再生信号周波数2MHzの条件
によるものである。これによると、Inの含有量が
少ない時、Ｃ／ＮはTe89（TiAg）4Se7とほとんど
変わらないが、Inの含有量が10［モル％］以上に
なると、Ｃ／Ｎは下がつていく。Inの含有量ｚが
ｚ≦20％の時にＣ／Ｎが45dB以上を確保するこ
とができ、光学記録媒体として使用可能である。 On the other hand, Figure 4 shows the relationship between the In content (mol%) in Te 89 -z・(TiAg) 4 Se 7 Inz and the C/N of the reproduced signal.
(dB). Note that this relationship is based on the conditions that the disk rotation speed is 700 rpm and the reproduced signal frequency is 2 MHz. According to this, when the In content is low, the C/N is almost the same as Te 89 (TiAg) 4 Se 7 , but when the In content exceeds 10 [mol%], the C/N decreases. I'll follow you. When the In content z is z≦20%, a C/N of 45 dB or more can be ensured, and it can be used as an optical recording medium.
以上のことから、Inの含有量ｚは10≦20が好ま
しい。 From the above, the In content z is preferably 10≦20.
一方、Te（100−ｘ−ｙ−ｚ）・（TiAg）ｘ・
Sey・Inzにおいて、TiAg、Se、及びInの含有量
が30％を越えると、ピツト（孔）の形成を良好に
行なうことができない。従つて、ｘ＋ｙ＋ｚ＜30
であることが必要である。 On the other hand, Te(100-x-y-z)・(TiAg)x・
If the content of TiAg, Se, and In exceeds 30% in Sey/Inz, pits (pores) cannot be formed well. Therefore, x+y+z<30
It is necessary that
上述から、Te（100−ｘ−ｙ−ｚ）・（TiAg）
ｘ・Sey・Inzの記録膜において、10≦ｚ≦20、
ｘ＋ｙ＋ｚ＜30の条件を満たすことにより従来の
記録膜が有する種々の特性を維持したままクラツ
クの発生を防止することができる。 From the above, Te(100−x−y−z)・(TiAg)
In the x・Sey・Inz recording film, 10≦z≦20,
By satisfying the condition x+y+z<30, it is possible to prevent the occurrence of cracks while maintaining the various characteristics of conventional recording films.
(ト) 発明の効果
本発明によれば、改良された光学記録媒体、即
ちTe（100−ｘ−ｙ−ｚ）・Tix・Agy・Sez（ただ
し、ｘ＋ｙ＋ｚ＜15）が有する特性を維持したま
ま長期間にわたつてクラツクの発生を防止するこ
とができる。従つて、光学記録媒体のより一層の
長寿命化を図るこことができる。(G) Effects of the Invention According to the present invention, improved optical recording media, that is, properties of Te (100-x-y-z), Tix, Agy, Sez (where x+y+z<15) are maintained. The occurrence of cracks can be prevented for a long period of time. Therefore, it is possible to further extend the life of the optical recording medium.
図は本発明の実施例に係り、第１図は光学記録
媒体の断面斜視図、第２図は相対的透過率の加速
試験結果を示す特性図、第３図はデイスク半径対
LDパワーの関係を示す特性図、第４図はInの含
有量対再生信号のＣ／Ｎの関係を示す特性図であ
る。
１……記録膜、２……透明基板。
The figures relate to embodiments of the present invention, in which Fig. 1 is a cross-sectional perspective view of an optical recording medium, Fig. 2 is a characteristic diagram showing the results of an accelerated test of relative transmittance, and Fig. 3 is a graph showing the disk radius vs.
A characteristic diagram showing the relationship between the LD power and FIG. 4 is a characteristic diagram showing the relationship between the In content and the C/N of the reproduced signal. 1...Recording film, 2...Transparent substrate.
Claims (1)
する形式の光学記録媒体において、基板に［Te
（100−ｘ−ｙ−ｚ）・（TiAg）ｘ・Sey・Inz、た
だし10≦ｚ≦20、ｘ＋ｙ＋ｚ＜30；ｘ、ｙ、ｚは
モル％を示す］からなる記録膜を形成したことを
特徴とする光学記録媒体。1 In an optical recording medium that records information by irradiation with an energy beam, the substrate is coated with [Te
(100-x-y-z)・(TiAg)x・Sey・Inz, where 10≦z≦20, x+y+z<30; x, y, and z indicate mol%] Characteristic optical recording media.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59220811A JPS6198597A (en) | 1984-10-19 | 1984-10-19 | Photo-recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59220811A JPS6198597A (en) | 1984-10-19 | 1984-10-19 | Photo-recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6198597A JPS6198597A (en) | 1986-05-16 |
| JPH0363519B2 true JPH0363519B2 (en) | 1991-10-01 |
Family
ID=16756928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59220811A Granted JPS6198597A (en) | 1984-10-19 | 1984-10-19 | Photo-recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6198597A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649391B2 (en) * | 1986-10-27 | 1994-06-29 | ダイセル化学工業株式会社 | Optical recording medium for DRAW |
| JP4925255B2 (en) * | 2005-12-16 | 2012-04-25 | 独立行政法人農業・食品産業技術総合研究機構 | Movable lid type sewage water sprinkler with water flow disperser and automatic cleaning mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5766996A (en) * | 1980-10-15 | 1982-04-23 | Hitachi Ltd | Information recording member and method of preparing thereof |
| JPS5949995A (en) * | 1982-09-16 | 1984-03-22 | Asahi Chem Ind Co Ltd | Information storing medium |
-
1984
- 1984-10-19 JP JP59220811A patent/JPS6198597A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5766996A (en) * | 1980-10-15 | 1982-04-23 | Hitachi Ltd | Information recording member and method of preparing thereof |
| JPS5949995A (en) * | 1982-09-16 | 1984-03-22 | Asahi Chem Ind Co Ltd | Information storing medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6198597A (en) | 1986-05-16 |
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