JPH01102753A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH01102753A JPH01102753A JP62258999A JP25899987A JPH01102753A JP H01102753 A JPH01102753 A JP H01102753A JP 62258999 A JP62258999 A JP 62258999A JP 25899987 A JP25899987 A JP 25899987A JP H01102753 A JPH01102753 A JP H01102753A
- Authority
- JP
- Japan
- Prior art keywords
- outer peripheral
- substrate
- optical disk
- peripheral part
- disk
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000002184 metal Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000007767 bonding agent Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 33
- 239000010410 layer Substances 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000005374 Kerr effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- 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、円盤状の透明な基板の盤面に設けた記録部に
文書ファイル、画像、コードデータ等の情報を記録する
光ディスクに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical disc that records information such as document files, images, code data, etc. in a recording section provided on the surface of a disc-shaped transparent substrate. .
光ディスクは、円盤状の透明な基板の盤面に記録部を形
成したものであり、この基板の背面側から光ビームを照
射することにより記録部へのアクセスを行う。ところが
、これでは光ディスクの一面にしか記録を行うことがで
きない。そこで、２枚の基板を貼り合わせて光ディスク
の両面に記録可能とすることにより、記憶容量の増加を
図ろうとする場合があった。An optical disc has a recording section formed on the surface of a disk-shaped transparent substrate, and the recording section is accessed by irradiating a light beam from the back side of the substrate. However, with this method, recording can only be performed on one side of the optical disc. Therefore, there have been cases in which an attempt has been made to increase the storage capacity by bonding two substrates together to enable recording on both sides of an optical disc.
このようにして両面記録が可能となった従来の光磁気デ
ィスク１１を第６図に示す。２枚の基板１２・１２のそ
れぞれの一方の盤面には、記録部として磁性膜１３・１
３が形成されている。そして、これらの基板１２・１２
は、磁性膜１３・１３側を向かい合わせにして、接着剤
１４の層を介し接着されている。なお、この光磁気ディ
スク１１の両面中央部には、ドライブ装置へのチャッキ
ングのためのセンタハブ１５・１５がそれぞれ設けられ
ている。FIG. 6 shows a conventional magneto-optical disk 11 that allows double-sided recording in this manner. On one side of each of the two substrates 12, 12, a magnetic film 13, 1 is provided as a recording section.
3 is formed. And these substrates 12, 12
are bonded together with the magnetic films 13 facing each other through a layer of adhesive 14. Note that center hubs 15 for chucking into a drive device are provided at the center of both sides of the magneto-optical disk 11, respectively.
また、記憶容量の増加を図る必要がない場合にも、記録
部の保護や光デイスク自体の補強のために２枚の基板を
貼り合わせる場合がある。この場合にも、一方の基板の
記録部を形成した盤面側に、接着剤の層を介して保護の
ための基板を接着している。 ゛
〔発明が解決しようとする問題点〕
ところが、このように２枚の基板を貼り合わせた従来の
光ディスクは、接着剤の層の周縁部が外気に露出するの
で、この接着剤の層の隙間から水分や酸素が内部に浸入
して、記録部に損傷を及ぼす場合があるという問題点を
有していた。Furthermore, even when there is no need to increase the storage capacity, two substrates may be bonded together to protect the recording section or to reinforce the optical disk itself. In this case as well, a protective substrate is bonded to the disk surface side of one substrate on which the recording section is formed via an adhesive layer. [Problems to be solved by the invention] However, in conventional optical discs in which two substrates are bonded together in this way, the periphery of the adhesive layer is exposed to the outside air, so the gap between the adhesive layers is This has caused a problem in that moisture and oxygen may enter the inside of the recording section and damage the recording section.
例えば、消去可能な光ディスクの一種である光 ′磁気
ディスクの内部にこのような水分や酸素が浸入すると、
記録部である磁性膜が劣化する。また、ＣＤ ［Ｃｏｍ
ｐａｃｔ Ｄｉｓｋ］等の再生専用ディスクで（よ、記
録部であるピント面に形成された反射膜が腐食される。For example, if moisture or oxygen enters the inside of an optical magnetic disk, which is a type of erasable optical disk,
The magnetic film that is the recording section deteriorates. Also, CD [Com
On read-only discs such as Pact Discs, the reflective film formed on the focusing surface, which is the recording area, corrodes.
さらに、追記型光ディスクにおいても、記録部の種類に
応じた損傷を受ける。このように光ディスクが記録部に
損傷を受けると、製品の品質や信頼性を低下させること
になる。Furthermore, write-once optical discs are also subject to damage depending on the type of recording section. If the recording portion of the optical disc is damaged in this way, the quality and reliability of the product will be degraded.
本発明に係る光ディスクは、上記問題点を解決するため
に、円盤状の透明な基板の一方の盤面に外周部を除いて
記録部を形成し、このように記録部を形成した基板を少
なくとも１枚含む２枚の円盤状の基板を、一方の盤面同
士を向かい合わせにして、外周部を除き接着剤の層によ
り接着し、さらに、向かい合う盤面間の外周部の間隙を
全周に亙ってろう接合金により封止したことを特徴とし
ている。In order to solve the above-mentioned problems, the optical disc according to the present invention has a recording section formed on one disc surface of a disc-shaped transparent substrate excluding the outer peripheral part, and the substrate on which the recording section is formed in this way has at least one disc surface. Two disk-shaped substrates, one of which faces each other, are glued together with a layer of adhesive except for the outer periphery, and then the gap between the outer peripheries between the opposing disk surfaces is covered over the entire circumference. It is characterized by being sealed with a soldered metal.
上記構成の光ディスクは、２枚の基板の間隙を周囲のろ
う接合金によって封止されるので、内部の記録部が外気
から完全にしゃ断される。In the optical disc having the above structure, the gap between the two substrates is sealed by the surrounding solder metal, so the internal recording section is completely cut off from the outside air.
記録部は、例えば光ディスクが消去可能な光磁気ディス
クの場合には磁性膜であり、ＣＤ等の再生専用ディスク
では基板面のピットとこれを覆う反射膜であり、追記型
光ディスクの場合には金属膜等である。For example, the recording part is a magnetic film in the case of an erasable magneto-optical disc, a pit on the substrate surface and a reflective film covering it in a read-only disc such as a CD, and a metal film in the case of a write-once optical disc. membrane etc.
ろう接合金は、低融点のものが半田であり、高融点のも
のがろうである。このろう接合金の含浸を容易にするた
めに、予め２枚の基板におけるそれぞれの一方の盤面の
外周部に、薄膜技術等によって環状の金属膜を形成して
おくこともできる。As for braze joint metals, those with a low melting point are solder, and those with a high melting point are wax. In order to facilitate this impregnation with the solder metal, an annular metal film may be formed in advance on the outer periphery of one of the two board surfaces by thin film technology or the like.
〔実施例１〕
本発明の一実施例を第１図乃至第３図に基づいて説明す
れば、以下の通りである。[Embodiment 1] An embodiment of the present invention will be described below based on FIGS. 1 to 3.
本実施例の光磁気ディスク１は、第１図に示すように、
２枚の基板２・２を、接着剤４の層及び半田６の層を介
して接着することにより構成されている。As shown in FIG. 1, the magneto-optical disk 1 of this embodiment has the following features:
It is constructed by bonding two substrates 2 through a layer of adhesive 4 and a layer of solder 6.
基板２は、円盤状の透明なガラス板又はアクリル樹脂、
ポリカーボネイト樹脂若しくはエポキシ樹脂等からなる
プラスチック板で構成されている。各基板２の一方の盤
面には、第３図に示すように、外周部と内周部とを除い
て環状に磁性膜３が形成されている。この磁性膜３は、
垂直磁気異方性を有する磁性体の膜であり、レーザ光に
よる熱とバイアス磁界により情報の記録・消去が行われ
、レーザ光が反射する際のカー効果により記録情報が読
み出されるようになっている。また、この基板２の同じ
盤面における外周部には、磁性膜３の外縁から少しギャ
ップを設けて環状に金属膜７が形成されている。金属膜
７は、ニッケル又は金等の薄膜からなり、無電解メツキ
又は蒸着等によって形成する。この金属膜７は、半田６
を馴染ませ含浸を容易にするためのものである。The substrate 2 is a disc-shaped transparent glass plate or acrylic resin,
It is constructed from a plastic plate made of polycarbonate resin or epoxy resin. As shown in FIG. 3, on one surface of each substrate 2, a magnetic film 3 is formed in an annular shape except for the outer circumference and the inner circumference. This magnetic film 3 is
A magnetic film with perpendicular magnetic anisotropy. Information is recorded and erased using the heat generated by the laser beam and a bias magnetic field, and the recorded information is read out using the Kerr effect when the laser beam is reflected. There is. Further, on the outer periphery of the same board surface of the substrate 2, a metal film 7 is formed in an annular shape with a slight gap from the outer edge of the magnetic film 3. The metal film 7 is made of a thin film of nickel or gold, and is formed by electroless plating, vapor deposition, or the like. This metal film 7 is connected to the solder 6
This is to familiarize the liquid and facilitate impregnation.
この基板２・２は、まずそれぞれの一方の盤面を向かい
合わせにし、接着剤４の層を介して接着する。接着剤４
は、エポキシ系樹脂、アクリル系樹脂又はシリコン系樹
脂等を用いる。また、この接着剤４の層は、基板２・２
の盤面における外周部を除いた全面に形成される。実際
には、金属膜７の内縁部に掛かる程度まで形成する。The substrates 2 are first placed with one side facing each other and bonded together with a layer of adhesive 4 interposed therebetween. adhesive 4
In this case, epoxy resin, acrylic resin, silicone resin, etc. are used. Moreover, this layer of adhesive 4 is applied to the substrates 2 and 2.
It is formed on the entire surface of the board excluding the outer periphery. Actually, it is formed to the extent that it covers the inner edge of the metal film 7.
このようにして接着された基板２・２は、半田浴槽中を
通すことにより、向かい合う盤面間の外周部の間隙に半
田６を含浸させる。半田６は、金属膜７・７に案内され
てこの外周部の隙間に埋まり込み、全周に亙って層状に
形成される。この際、接着剤４の層が金属膜７の内縁部
に掛かる程度まで形成されているので、半田６の層は、
接着剤４の層の外縁まで確実に埋まり込み、不要な隙間
が生じない。The thus bonded substrates 2 are passed through a solder bath to impregnate the gap between the outer peripheries between the opposing boards with solder 6. The solder 6 is guided by the metal films 7, 7, and is embedded in the gap at the outer periphery, forming a layer over the entire periphery. At this time, since the layer of adhesive 4 is formed to the extent that it covers the inner edge of the metal film 7, the layer of solder 6 is
The adhesive 4 is reliably embedded up to the outer edge of the layer, and no unnecessary gaps are created.
なお、第１図に示すように、この光磁気ディスクｌの両
面中央部には、ドライブ装置へのチャッキングのための
センタハブ５・５がそれぞれ設けられている。As shown in FIG. 1, center hubs 5, 5 for chucking into a drive device are provided at the center of both sides of the magneto-optical disk l, respectively.
上記のように構成された光磁気ディスク１は、２枚の基
板２・２間を外周部の半田６の層によって封止されるの
で、内部の磁性膜３・３を外気から確実にしゃ断するこ
とができる。このため、水分や酸素が基板２・２間に浸
入して磁性膜３・３を劣化させるということがなくなる
。In the magneto-optical disk 1 configured as described above, the space between the two substrates 2 is sealed by the layer of solder 6 on the outer periphery, so that the internal magnetic films 3 are reliably isolated from the outside air. be able to. This prevents moisture and oxygen from penetrating between the substrates 2 and 2 and deteriorating the magnetic films 3.
〔実施例２〕
本発明の他の実施例を第４図に基づいて説明する。なお
、前記実施例１と同一の機能を有する構成部材には、同
じ符号を付記してその説明を省略する。[Embodiment 2] Another embodiment of the present invention will be described based on FIG. 4. Components having the same functions as those in the first embodiment will be denoted by the same reference numerals, and the explanation thereof will be omitted.
本実施例の光磁気ディスク１は、磁性膜３を形成した基
板２と磁性膜３を形成しない基板２とを接着剤４の層及
び半田６の層を介して接着したものである。磁性膜３を
形成しない基板２は、磁性膜３を形成した基板２の歪み
を是正し磁性膜３を保護するためのものである。従って
、この磁性膜３を形成しない基板２は、透明である必要
がなく、ガラス板やプラスチック板以外の材質であっ゛
てもよい。In the magneto-optical disk 1 of this embodiment, a substrate 2 on which a magnetic film 3 is formed and a substrate 2 on which no magnetic film 3 is formed are bonded together through a layer of adhesive 4 and a layer of solder 6. The substrate 2 on which the magnetic film 3 is not formed is used to correct the distortion of the substrate 2 on which the magnetic film 3 is formed and to protect the magnetic film 3. Therefore, the substrate 2 on which the magnetic film 3 is not formed does not need to be transparent, and may be made of a material other than a glass plate or a plastic plate.
本実施例のように磁性膜３を形成した基板２に保護のた
めの基板２を張り合わせた場合にも、半田６の層によっ
て内部が封止されるので、水分や酸素が浸入して磁性膜
３を劣化させるということがなくなる。Even when the substrate 2 for protection is bonded to the substrate 2 on which the magnetic film 3 is formed as in this embodiment, the inside is sealed by the layer of solder 6, so moisture and oxygen may infiltrate and prevent the magnetic film from forming. 3 will not deteriorate.
〔実施例３〕
本発明の他の実施例を第５図に基づいて説明する。なお
、前記実施例１と同一の機能を有する構成部材には、同
じ符号を付記してその説明を省略する。[Embodiment 3] Another embodiment of the present invention will be described based on FIG. 5. Components having the same functions as those in the first embodiment will be denoted by the same reference numerals, and the explanation thereof will be omitted.
本実施例の光磁気ディスク１は、実施例１における基板
２・２のそれぞれの一方の盤面の外周部をテーパ面２ａ
・２ａに形成したものである。この子−パ面２ａは、基
板２の一方の盤面から他方の盤面側に近づくに従って径
が大きくなるように形成されたテーパ面である。金属膜
７・７は、このテーパ面２ａ・２ａ上に形成されている
。The magneto-optical disk 1 of this embodiment has a tapered surface 2a on the outer periphery of each of the substrates 2, 2 in the first embodiment.
・It is formed in 2a. The secondary surface 2a is a tapered surface formed such that the diameter increases as it approaches from one surface of the substrate 2 to the other surface. The metal films 7, 7 are formed on these tapered surfaces 2a, 2a.
通常、接着剤４の層の厚さは十数μｍ〜数＋μｍ程度の
大きさであり、基板２・２の間隙は極めて狭い。このた
め、金属膜７・７を設けても、半田６が十分に含浸され
ない虞れが考えられる。そこで、本実施例のように、テ
ーパ面２ａ・２ａを形成して基板２・２の間隙が周端部
で広くなるようにすれば、半田浴槽中で半田６を確実に
含浸させることができる。なお、金属膜７の膜厚は数μ
ｍ程度なので、基板２・２の間隙にはほとんど影響を与
えない。Normally, the thickness of the layer of adhesive 4 is about tens of micrometers to several + micrometers, and the gap between the substrates 2 is extremely narrow. Therefore, even if the metal films 7 are provided, there is a possibility that the solder 6 will not be sufficiently impregnated. Therefore, as in this embodiment, by forming the tapered surfaces 2a and 2a so that the gap between the substrates 2 and 2 becomes wider at the peripheral edge, it is possible to reliably impregnate the solder 6 in the solder bath. . Note that the thickness of the metal film 7 is several microns.
Since it is about m, it has almost no effect on the gap between the substrates 2.
従って、本実施例の光磁気ディスク１は、半田６の層の
形成を容易かつ確実に行うことができるようになる。Therefore, in the magneto-optical disk 1 of this embodiment, the layer of solder 6 can be formed easily and reliably.
本発明に係る光ディスクは、以上のように、円盤状の透
明な基板の一方の盤面に外周部を除いて記録部を形成し
、このように記録部を形成した基板を少なくとも１枚含
む２枚の円盤状の基板を、一方の盤面同士を向かい合わ
せにして、外周部を除き接着剤の層により接着し、さら
に、向かい合う盤面間の外周部の間隙を全周に亙ってろ
う接合金により封止した構成をなしている。As described above, the optical disc according to the present invention has a disc-shaped transparent substrate with a recording section formed on one surface of the disc except for the outer peripheral part, and two discs including at least one substrate on which the recording section is formed in this way. The disk-shaped substrates are placed with one side of the board facing each other, and are bonded together with a layer of adhesive except for the outer periphery, and then the gap between the outer peripheries between the facing sides is filled with solder metal over the entire circumference. It has a sealed configuration.
これにより、接着された２枚の基板の内部の記録部が外
気から完全にしゃ断されて保護される。As a result, the recording section inside the two bonded substrates is completely cut off from the outside air and protected.
従って、本発明の光ディスクは、水分や酸素が基板間に
浸入して記録部を損傷するようなことがなくなり、製品
の品質や信頼性を高めることができるという効果を奏す
る。Therefore, the optical disc of the present invention has the effect that moisture and oxygen do not enter between the substrates and damage the recording section, and the quality and reliability of the product can be improved.
第１図乃至第３図は本発明の一実施例を示すものであっ
て、第１図は光磁気ディスクの縦断面斜視図、第２図は
、光磁気ディスクの外周部を拡大した縦断面正面図、第
３図は光磁気ディスクの一方の基板の平面図である。第
４図は本発明の他の実施例を示すものであって、光磁気
ディスクの外周部を拡大した縦断面正面図である。第５
図は本発明のさらに他の実施例を示すものであって、光
磁気ディスクの外周部を拡大した縦断面正面図である。
第６図は従来例を示すものであって、光磁気ディスクの
縦断面斜視図である。
１は光磁気ディスク（光ディスク）、２は基板、３は磁
性膜（記録部）、４は接着剤、６は半田（ろう接合金）
、７は金属膜である。1 to 3 show one embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional perspective view of a magneto-optical disk, and FIG. 2 is a vertical cross-section of an enlarged outer peripheral portion of the magneto-optical disk. The front view and FIG. 3 are plan views of one substrate of the magneto-optical disk. FIG. 4 shows another embodiment of the present invention, and is an enlarged longitudinal cross-sectional front view of the outer peripheral portion of the magneto-optical disk. Fifth
The figure shows still another embodiment of the present invention, and is an enlarged vertical cross-sectional front view of the outer peripheral part of a magneto-optical disk. FIG. 6 shows a conventional example, and is a vertical cross-sectional perspective view of a magneto-optical disk. 1 is a magneto-optical disk (optical disk), 2 is a substrate, 3 is a magnetic film (recording part), 4 is an adhesive, 6 is a solder (braze joint metal)
, 7 are metal films.
Claims (1)
記録部を形成し、このように記録部を形成した基板を少
なくとも１枚含む２枚の円盤状の基板を、一方の盤面同
士を向かい合わせにして、外周部を除き接着剤の層によ
り接着し、さらに、向かい合う盤面間の外周部の間隙を
全周に亙ってろう接合金により封止したことを特徴とす
る光ディスク。1. A recording section is formed on one surface of a disk-shaped transparent substrate excluding the outer peripheral part, and two disk-shaped substrates including at least one substrate on which the recording section is formed are placed on one disk surface. An optical disc characterized in that the discs are placed facing each other and bonded to each other with a layer of adhesive except for the outer periphery, and further, the gap between the facing discs at the outer periphery is sealed over the entire circumference with a solder metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62258999A JPH01102753A (en) | 1987-10-14 | 1987-10-14 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62258999A JPH01102753A (en) | 1987-10-14 | 1987-10-14 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01102753A true JPH01102753A (en) | 1989-04-20 |
Family
ID=17327951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62258999A Pending JPH01102753A (en) | 1987-10-14 | 1987-10-14 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01102753A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62204446A (en) * | 1986-03-03 | 1987-09-09 | Canon Inc | Optical recording medium |
-
1987
- 1987-10-14 JP JP62258999A patent/JPH01102753A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62204446A (en) * | 1986-03-03 | 1987-09-09 | Canon Inc | Optical recording medium |
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