JPS60229252A - Information recording substrate - Google Patents
Information recording substrateInfo
- Publication number
- JPS60229252A JPS60229252A JP59085240A JP8524084A JPS60229252A JP S60229252 A JPS60229252 A JP S60229252A JP 59085240 A JP59085240 A JP 59085240A JP 8524084 A JP8524084 A JP 8524084A JP S60229252 A JPS60229252 A JP S60229252A
- Authority
- JP
- Japan
- Prior art keywords
- air
- disk
- outside
- spacer
- information 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.)
- Pending
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims abstract description 20
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 230000005494 condensation Effects 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 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
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000005373 porous glass Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
- G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
に配列されたヒフ）によって記録され、レーザ光などの
光学的再生手段にて読み書きが行なわれるエアーサンド
インチ型の情報記録基板の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to the structure of an air-sand inch type information recording substrate on which information is recorded by hiffs arranged in a row, and read and written by optical reproduction means such as a laser beam.
（従来技術とその問題点）
一般にビデオディスク、光ファイルメモリなどに用いら
れる円盤状の情報記録基板は、光信号を透過するため透
明なプラスチック材料、例えは、アクリル樹脂（ポリメ
チルメタクリレート）やポリカーボネート樹脂などの表
面に薄膜記録層が形成されたディスクを、記録層が互い
に対向し、かつその記録層間に中空部が形成されるよう
に互いに内周および外周縁部で接合したエアーサンドイ
ンチ型構造が採用されている。(Prior art and its problems) Generally, disc-shaped information recording substrates used in video discs, optical file memories, etc. are made of transparent plastic materials, such as acrylic resin (polymethyl methacrylate) or polycarbonate, to transmit optical signals. An air sandwich type structure in which disks with thin recording layers formed on the surface of resin or the like are joined together at the inner and outer edges so that the recording layers face each other and a hollow space is formed between the recording layers. has been adopted.
このエアーサンドイッチ型情報記録基板は、記録層が外
部と遮断されているため取扱いによって発生する破損や
キズがなく空気中の塵芥の付着による化学反応や劣化が
ないなどの特長があり耐久性の優れた性質を持っている
。This air sandwich type information recording substrate has excellent durability because the recording layer is isolated from the outside, so there is no damage or scratches caused by handling, and there is no chemical reaction or deterioration due to adhesion of dust in the air. It has certain characteristics.
しかし従来のエアーサンドイッチ型情報記録基板の形状
は第１図に示した断面図の如く中空部分が外気と遮断さ
れた密閉型構造が採られている。すなわち、Ａは中心に
丸穴を有する円盤状の情報記録基板で、二枚の透明な平
行平板である第１ディスフ１および第二ディスク１′と
リング状の内周スペーサ３および外周スペーサ４の囲者
から構成されており、第一ディスク１と第二ディスク】
′にはそれぞれ情報信号を記録する層２と２′が形成さ
れている。この記録層２と２′は互いに対向しかつ千竹
に配置きれた状態で第一と第二のディスク１と１′の内
外周部分にディスクと同材質のリング状グラスチック製
スペーサ４．５を挾んで接合し、中空部５が密閉された
構造となっている。However, the shape of the conventional air sandwich type information recording substrate has a closed structure in which the hollow portion is isolated from the outside air, as shown in the cross-sectional view of FIG. That is, A is a disk-shaped information recording substrate with a round hole in the center, and is composed of two transparent parallel flat plates, a first disk 1 and a second disk 1', and a ring-shaped inner spacer 3 and outer spacer 4. It consists of a first disk 1 and a second disk】
' are formed with layers 2 and 2' for recording information signals, respectively. The recording layers 2 and 2' face each other and are arranged in a circular pattern, and a ring-shaped glass spacer 4.5 made of the same material as the disks is attached to the inner and outer circumferential portions of the first and second disks 1 and 1'. are sandwiched and joined to form a structure in which the hollow part 5 is sealed.
しかしながらこのような構造のディスクは、周囲の温度
変化や空輸中の大気圧変化により発生する中空部分と外
部との圧力差現象のためディスクが変形し、その結果記
録層が破損したり、情報を読み書きする場合に信号のド
ロップアウトが発生する欠点がある。また環境の急激な
温度降下（冷却作用）により中空部分く密閉されている
空気中の水分が結露現象を起して記録層と化学反応を生
じ耐久性の劣化を招くと言った問題がある。However, disks with this structure deform due to the pressure difference between the hollow part and the outside caused by changes in ambient temperature or atmospheric pressure during air transport, resulting in damage to the recording layer or loss of information. The drawback is that signal dropouts occur when reading and writing. Another problem is that due to a sudden drop in the temperature of the environment (cooling effect), moisture in the air that is tightly sealed in the hollow section causes dew condensation, which causes a chemical reaction with the recording layer, resulting in deterioration of durability.
（発明の目的）
本発明は、このような従来の欠点を除去せしめて耐久性
に優れたエアーサンドイッチ型情報記録基板を提供する
ことにある。(Object of the Invention) An object of the present invention is to provide an air sandwich type information recording substrate which eliminates such conventional drawbacks and has excellent durability.
（発明の構成）
本発明によれば、内外局部のスペーサを通気性のある多
孔質材料で形成することにより、温度変化や大気圧変化
により発生する圧力差や結露現象が全く解消されること
を特徴とするエアーサンドイッチ型情報記録基板が得ら
れる。(Structure of the Invention) According to the present invention, by forming the inner and outer spacers with a porous material having air permeability, pressure differences and dew condensation phenomena caused by temperature changes and atmospheric pressure changes can be completely eliminated. A characteristic air sandwich type information recording substrate is obtained.
（構成の詳細な説明）
本発明は、上述の構成をとることにより従来技術の問題
点を解決した。まずズペーサを空気の流通は自由である
が空気中に浮遊している塵芥の侵入を防止できる多孔質
材料（例えば「工業材料」１９７９年１２月号ＶｏＬ２
７ ＮＱ １２２針−１３４ページ参照）で形成するこ
とにより、従来の通気性がない場合に発生した中空部と
外部との圧力差によるディスク変形が皆無となる利点が
ある。たとえ温度変化や高度変化により圧力差が発生し
てもただちに外部と中空部の間で空気の流通混合が行な
われるため外部と中空部の圧力は常に一定となりディス
クの変形扛生しない。(Detailed Description of Configuration) The present invention solves the problems of the prior art by adopting the above-described configuration. First, Zuspacea is a porous material that allows air to flow freely but prevents the intrusion of dust floating in the air (for example, "Industrial Materials", December 1979 issue, Vol. 2).
7 NQ 122 needles (see page 134), there is an advantage that there is no disk deformation due to the pressure difference between the hollow part and the outside, which occurs when there is no air permeability in the conventional case. Even if a pressure difference occurs due to a change in temperature or altitude, air is immediately circulated and mixed between the outside and the hollow, so the pressure between the outside and the hollow is always constant and the disk does not deform.
また外部の温度が急激に降下した場合にも外部の冷たい
空気が中空部分の暖かい空気とただちに混合することに
より外部と中空部の温度差が無くなるため、中空部分の
結露現象が全く発生しない特長がある。Additionally, even if the outside temperature suddenly drops, the cold air from the outside immediately mixes with the warm air in the hollow part, eliminating the temperature difference between the outside and the hollow part, so no condensation occurs in the hollow part. be.
（実施例）
以下本発明の実施例について図面を参照して詳細に説明
する。第２図は本発明のエアーサンドイッチ型情報記録
基板の構成の一実施例を説明するための断面図である。(Example) Examples of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a sectional view for explaining one embodiment of the configuration of the air sandwich type information recording substrate of the present invention.
Ｂは中心に丸穴を有する円板状の情報記録基板で透明な
二枚のディスク１１と１１’ およびディスク間に挾持
された内外周スペーサ１３と１４の囲者から構成されて
おり、１２および１２′ は情報信号が記録されている
層である。内外周スペーサ１３と１４は、空気は自由に
流通するが空気中に浮遊している塵芥は通さないフィル
ター構造でディスク１１および１１’ と同材質か性質
が類似したリング状のグラスチック材で製作されている
。B is a disk-shaped information recording substrate with a round hole in the center, and is composed of two transparent disks 11 and 11' and inner and outer circumferential spacers 13 and 14 sandwiched between the disks. 12' is a layer in which information signals are recorded. The inner and outer peripheral spacers 13 and 14 have a filter structure that allows air to flow freely but does not allow dust floating in the air to pass through, and are made of a ring-shaped glass material that is the same material as the disks 11 and 11' or has similar properties. has been done.
本発明罠おけるディスクの組立祉、第１図の場合と同様
に接着剤（図示せず）を用いて貼合せることにより行な
われるためエアーサンドイッチ構造には何ら支障はない
が、中空部分と外部の空気がフィルターを兼ねたスペー
サの中を自由に流通できる構成になっている。Assembling the disks in the trap of the present invention is done by pasting them together using an adhesive (not shown) in the same way as in the case of Fig. 1, so there is no problem with the air sandwich structure. The structure allows air to flow freely through the spacer, which also serves as a filter.
本実施例では、スペーサ全体が通気性を有する多孔質材
料で構成されている場合について述べたが、リング状ス
ペーサの一部分を切欠いて多孔質材料を埋込んだ形状や
多孔質材料の両面に通気性のない円板を貼合せてスペー
サとした構造などエアーサンドイッチ構造の中空部分と
外部との空気の流通が自由に行なわれる方式であれは同
様の効果が得られる。In this example, the case where the entire spacer is made of a porous material with air permeability is described, but there are cases where a part of the ring-shaped spacer is cut out and the porous material is embedded, and there is also a case where both sides of the porous material have ventilation. A similar effect can be obtained by using a method in which air can freely circulate between the hollow part of the air sandwich structure and the outside, such as a structure in which a spacer is made by laminating neutral disks.
なお、記録層として二面記録の可能なエアーサンドイッ
チ型ティスクについて説明したがいずれか一方のみの記
録面を有するものであっても良いことは言うまでもない
。Although an air sandwich type disk capable of recording on two surfaces has been described as a recording layer, it goes without saying that the disk may have only one recording surface.
（発明の効果）
本発明の情報記録基板によれば、内外周のスペーサ材料
として通気性のある多孔質グラスチック材料を用いるこ
とにより従来の通気性のないスペーサを用いて貼合せた
密閉型中空部の場合における問題点であるディスクの変
形による読み書き信号のドロップアウトや結露による記
録層の劣化などが全く解消され耐久性の優れたエアーサ
ンドイッチ型情報記録基板が得られる。(Effects of the Invention) According to the information recording substrate of the present invention, by using a porous glass material with air permeability as the spacer material on the inner and outer peripheries, a closed hollow structure can be bonded using a conventional non-air permeable spacer. The problems encountered in the case of the above, such as read/write signal dropouts due to disk deformation and deterioration of the recording layer due to dew condensation, are completely eliminated, and an air sandwich type information recording substrate with excellent durability can be obtained.
第１図Ｌ、従来のエアーサンドイッチ型情報記録基板の
一例を説明する断面図、第２図は本発明のエアーサンド
イッチ型情報記録基板の構成の一実施例を示す断面図で
ある。
図において、１．１’ １１．１１’ はディスク、２
、２’ １２．１２’は記録層、３．４は通気性のない
プラスチック製内外周スペーサ、１３．１４は通気性を
有する多孔質プラスチック材料で製作された内外周スペ
ーサを示す。FIG. 1L is a sectional view illustrating an example of a conventional air sandwich type information recording substrate, and FIG. 2 is a sectional view showing an example of the configuration of the air sandwich type information recording substrate of the present invention. In the figure, 1.1'11.11' is a disk, 2
, 2'12.12' is a recording layer, 3.4 is an inner and outer peripheral spacer made of non-air permeable plastic material, and 13.14 is an inner and outer peripheral spacer made of a porous plastic material that has air permeability.
Claims (1)
二枚のディスク基板の内外周部をスペーサを介して平行
に貼合せたエアーサンドインチ構造の情報記録基板にお
いて、前記スペーサとしてご 通気性を有する多孔質性材料により構成しＹでを特徴と
する情報記録基板。[Claims] In an information recording substrate with an air sand inch structure in which the inner and outer peripheries of two disk substrates each having a recording surface on which information is read and written by light are laminated in parallel via a spacer, the spacer may be used as the spacer. An information recording substrate made of a porous material having air permeability and characterized by Y.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085240A JPS60229252A (en) | 1984-04-27 | 1984-04-27 | Information recording substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085240A JPS60229252A (en) | 1984-04-27 | 1984-04-27 | Information recording substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60229252A true JPS60229252A (en) | 1985-11-14 |
Family
ID=13853035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59085240A Pending JPS60229252A (en) | 1984-04-27 | 1984-04-27 | Information recording substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60229252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6193828U (en) * | 1984-11-26 | 1986-06-17 | ||
| JPS62180539A (en) * | 1986-02-04 | 1987-08-07 | Hitachi Maxell Ltd | Aeration type optical information recording disk |
| US5774447A (en) * | 1996-11-22 | 1998-06-30 | Eastman Kodak Company | Optical discs with cover sheets and dynamic pressure stabilization of the enclosed air |
-
1984
- 1984-04-27 JP JP59085240A patent/JPS60229252A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6193828U (en) * | 1984-11-26 | 1986-06-17 | ||
| JPS62180539A (en) * | 1986-02-04 | 1987-08-07 | Hitachi Maxell Ltd | Aeration type optical information recording disk |
| US5774447A (en) * | 1996-11-22 | 1998-06-30 | Eastman Kodak Company | Optical discs with cover sheets and dynamic pressure stabilization of the enclosed air |
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