JPS6363146A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPS6363146A JPS6363146A JP61206505A JP20650586A JPS6363146A JP S6363146 A JPS6363146 A JP S6363146A JP 61206505 A JP61206505 A JP 61206505A JP 20650586 A JP20650586 A JP 20650586A JP S6363146 A JPS6363146 A JP S6363146A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- recording medium
- optical recording
- sticking
- adhesive
- 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 25
- 239000000758 substrate Substances 0.000 claims abstract description 45
- 239000000853 adhesive Substances 0.000 abstract description 19
- 239000010410 layer Substances 0.000 abstract description 17
- 239000011347 resin Substances 0.000 abstract description 13
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 7
- 239000004417 polycarbonate Substances 0.000 abstract description 7
- 229920000515 polycarbonate Polymers 0.000 abstract description 7
- 239000012790 adhesive layer Substances 0.000 abstract description 6
- 239000012298 atmosphere Substances 0.000 abstract description 2
- 238000003848 UV Light-Curing Methods 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 244000046146 Pueraria lobata Species 0.000 description 5
- 235000010575 Pueraria lobata Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- VOBUAPTXJKMNCT-UHFFFAOYSA-N 1-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound CCCCCC(OC(=O)C=C)OC(=O)C=C VOBUAPTXJKMNCT-UHFFFAOYSA-N 0.000 description 1
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- 229930091051 Arenine Natural products 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 235000003823 Petasites japonicus Nutrition 0.000 description 1
- 240000003296 Petasites japonicus Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance 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、レーザー光を用いて、読み出し、書き込み可
能な光記録媒体の構造に関する。ＣＤ−ＲＯＭ、ＤＲＡ
Ｗ、Ｅ−ＤＲＡＷに利用できる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an optical recording medium that can be read and written using laser light. CD-ROM, DRA
Can be used for W and E-DRAW.
情報記録層部を２枚の基板の貼り合せ面側にもつ光記録
媒体では、内外周にスペーサーを介して２枚の基板を貼
り合せるエアーサンドイッチ構造が一般的である。第４
図に示す如くスペーサーを用いず接着剤３５ｔ−介して
２枚の基板３１．３４を貼り合せる密着貼り合せ構造の
場合、接着剤３５としては、ゴム系の粘着剤が用いられ
ている。In an optical recording medium having an information recording layer portion on the side where two substrates are bonded together, an air sandwich structure is generally used in which the two substrates are bonded to each other with a spacer interposed between the inner and outer peripheries. Fourth
As shown in the figure, in the case of a close bonding structure in which two substrates 31 and 34 are bonded together via an adhesive 35t without using a spacer, a rubber-based adhesive is used as the adhesive 35.
従来の粘着剤を用い次密着貼り合せ光記録媒体は、接着
層への気泡混入が避けられず、記録層よりの情報読み出
しの際に、レーザーの透過光を用いる事ができなかった
。本発明は、密着貼り合せ構造での接着剤としてゴム系
粘着剤ではなく、紫外線硬化接着剤、二液硬化型接着剤
で随度が２０００ｃｐｓ以下のものを用いて真窒容器内
で２枚の基板を貼シ合せ、光の透過光での情報読み出し
が可能で、貼シ合せによる光学歪を記録媒体に与えず、
容易に貼シ合せが実捲できる記録媒体の構造を提供する
事を目的としている。Conventional optical recording media that are closely bonded using adhesives cannot avoid the inclusion of air bubbles in the adhesive layer, making it impossible to use transmitted laser light when reading information from the recording layer. The present invention uses an ultraviolet curing adhesive or a two-component curing adhesive with a rate of 2,000 cps or less instead of a rubber-based adhesive as the adhesive for the close bonding structure. By laminating the substrates together, it is possible to read information using transmitted light, and the optical distortion caused by laminating the substrates is not applied to the recording medium.
The purpose is to provide a structure of a recording medium that can be easily laminated and rolled up.
本発明による光記録媒体は、情報記録層部が２枚の基板
の貼シ合せ面側に形成されている密着貼り合せ構造で、
その２枚の基板の少なくとも一方の内周貼り合せ面に、
基板内径と同心円状に、１つ、又は、複数の溝を設けた
事を特徴としている。The optical recording medium according to the present invention has a closely bonded structure in which the information recording layer portion is formed on the bonded surfaces of two substrates,
On the inner circumferential bonding surface of at least one of the two substrates,
A feature is that one or more grooves are provided concentrically with the inner diameter of the substrate.
〔実権例１〕
第１図は本発明による実権例である。１はポリカーボネ
ート基板１．２■厚（トラッキング用溝ピッチ１．６μ
？１％）で貼り合せ面側に光記録層部２を有する。５は
紫外線硬化樹脂よりなる接着層であり、表１に掲載する
配合より成っている。４は上下面ともに平滑なポリカー
ボネート基板１．２■厚である。基板４は紫外線波長５
６５ｎｍの光を単板状態で１０％以上透過するように紫
外線吸収剤の量を抑えた材料を用いている。第、２図は
第１図で示した０部の記録層部の拡大図である。６は窒
化シリコン膜１ｏｏｏＸ、７は光磁気記録膜（ＮａＤｙ
Ｆｅ０Ｏ） ４５０ Ｘ、 ８は窒化シリコン膜１
ｏｏｏＸであり、記録膜は、上記セラミック保護層でサ
ンドイッチされた構造となっている。第３図は第１図の
内周■部拡大図である。５はポリカーボネート基板１．
４の内径φ１５■と同心円状に各基板１，４の貼シ合せ
面側に設けられたグループである。真空中で第６図に示
す如く芯出しをして貼シ合せ、その後基板４側より露光
して図１に示す記録媒体とした。グループ５がある為、
芯出し軸９への紫外線硬化樹脂の貼シ合せ時の付着及び
露光に於る芯出し軸９への固着もなく、均一に基板１，
４を貼シ合せる事ができた。第５図にグループ５のない
場合の貼り合せ状況を示しているが、紫外線硬化樹脂３
は芯出し軸９へ付着し露光後固着してしまい、芯出し軸
９より記録媒体を取り外す際に記録媒体を破損してしま
つ九。又紫外線硬化樹脂の液量を調整して第７図（ａ）
、第７図（ｂ）に示す記録媒体を製作する事はできたが
、紫外線硬化樹脂の内周側の貼シ合せ時停止位置１０が
不安定であり再現性がない為、１０回に９回は記録層を
全域おおう事ができなかった。父上子く記録層全域をお
おう事ができた１回の貼υ合せの場合でも、紫外線硬化
樹脂の硬化時の収縮応力の為、記録層部にオーバーラツ
プする形で基板１゜４に複屈折の大きな部分が発生して
しまった。複屈折の値はオリジナルの値に対して３〜４
倍の値であり、それが極部的である為信号読は出し時そ
の部分のジッタが増加してしまい正確なデータ読み出し
ができなかつ念。複屈折の大きな範囲Ｆｉ２〜１０暖の
帯となっておシ、紫外線硬化樹脂の停止位置が複雑に入
りくんでいる所程大きかった。[Example 1 of Actual Rights] FIG. 1 is an example of actual rights according to the present invention. 1 is a polycarbonate board 1.2μ thick (tracking groove pitch 1.6μ
? 1%) and has an optical recording layer portion 2 on the bonding surface side. 5 is an adhesive layer made of an ultraviolet curing resin, which has the composition shown in Table 1. 4 is a polycarbonate substrate having a thickness of 1.2 mm and smooth on both the upper and lower surfaces. Substrate 4 has ultraviolet wavelength 5
A material with a reduced amount of ultraviolet absorber is used to transmit 10% or more of 65 nm light in a single plate state. 2 is an enlarged view of the recording layer portion of copy 0 shown in FIG. 1. 6 is a silicon nitride film 1oooX, 7 is a magneto-optical recording film (NaDy
Fe0O) 450X, 8 is silicon nitride film 1
oooX, and the recording film has a structure sandwiched between the above ceramic protective layers. FIG. 3 is an enlarged view of the inner periphery (■) of FIG. 1. 5 is a polycarbonate substrate 1.
This is a group provided on the bonding surface side of each substrate 1, 4 concentrically with the inner diameter φ15 of the substrate 4. The materials were centered in a vacuum as shown in FIG. 6 and pasted together, and then exposed to light from the substrate 4 side to form the recording medium shown in FIG. 1. Because there is group 5,
There is no adhesion of ultraviolet curable resin to the centering shaft 9 during lamination and no sticking to the centering shaft 9 during exposure, and the substrate 1,
I was able to paste 4 together. Figure 5 shows the bonding situation without Group 5.
It adheres to the centering shaft 9 and becomes stuck after exposure, resulting in damage to the recording medium when the recording medium is removed from the centering shaft 9. Also, by adjusting the amount of ultraviolet curing resin, as shown in Fig. 7(a).
, we were able to produce the recording medium shown in Figure 7(b), but because the stop position 10 at the time of lamination on the inner circumferential side of the ultraviolet curable resin was unstable and not reproducible, 9 out of 10 attempts were made. In this case, it was not possible to cover the entire recording layer. Even in the case of one lamination, which was able to cover the entire recording layer, due to the shrinkage stress of the ultraviolet curable resin during curing, birefringence was formed on the substrate 1°4, overlapping the recording layer. A big part has happened. The value of birefringence is 3-4 with respect to the original value
The value is double the value, and since it is local, the jitter in that part will increase when reading the signal, making it impossible to read the data accurately. The range of birefringence was large, Fi 2 to 10, and the more complex the stopping positions of the ultraviolet curing resin were, the larger the range was.
イルガキュア６５１；デルガイギー社製光反応開始剤Ｈ
ＤＤＡ ；ヘキサンジオールジアクリレートＴ
ＭＰＴＡ ： トリメチロールプロ／＜ントリ
アクリレートＮＰＧＤＡ ：ネオベンチルグリコ
ールＴＰＧＤＡ ； トリプロピングリコール
シアクリＶ−ト表１ 紫外線硬化樹脂の配合
〔実権例２〕
第８図は本発明による実施例である。１′欠ポリメチル
メタクリＶ−ト基板１．２１ｍ厚（トラッキング用溝ピ
ッチ１．６μｆＩ＆）で貼り合せ面側に記録層部２′を
有する。３′は紫外線硬化樹脂よりなる接着層であり、
表１に掲載する配合より成っている。Irgacure 651; Photoreaction initiator H manufactured by Delgeigy
DDA; hexanediol diacrylate T
MPTA: trimethylolpro/<triacrylate NPGDA: neobentyl glycol TPGDA; tripropyne glycol cyacrylate Table 1 Formula of ultraviolet curing resin [Example 2] FIG. 8 shows an example according to the present invention. A 1'-cut polymethyl methacrylate V-substrate having a thickness of 1.21 m (tracking groove pitch of 1.6 μfI&) and a recording layer portion 2' on the bonding surface side. 3' is an adhesive layer made of ultraviolet curing resin;
It consists of the formulation listed in Table 1.
１１は窒化シリコン、窒化アルミニウムの複合膜１、ｏ
ｏｏＸ厚である。４′は上下面ともに平滑なポリメチル
メタクリレート基板１．２−厚である。基板４′は紫外
線波長５６５ｎｒｎの光を単板状態で１０％以上透過す
るように紫外線吸収剤のｉを抑えた材料を用いている。11 is a composite film 1 of silicon nitride and aluminum nitride, o
It is ooX thick. 4' is a polymethyl methacrylate substrate having a thickness of 1.2 mm on both the upper and lower surfaces. The substrate 4' is made of a material in which the i of the ultraviolet absorber is suppressed so that it transmits 10% or more of the ultraviolet wavelength 565nrn in a single plate state.
第９図は第８図で示した０部の記録層部の拡大図である
。６′は窒化シリコン、窒化アルミニウムの複合体膜５
００Ｘ厚、７′は光磁気記録膜（Ｎ（ＬＤ７ＦＯｃｏ
） ５００ Ｘ、８′は窒化シリコン、窒化アルミニ
ウムの複合体膜５００ス厚であシ、記録膜は、上記セラ
ミック保護層でサンドイッチされた構造となっている。FIG. 9 is an enlarged view of the recording layer portion of copy 0 shown in FIG. 8. 6' is a composite film 5 of silicon nitride and aluminum nitride.
00X thickness, 7' is magneto-optical recording film (N(LD7FOco)
) 500X, 8' is a composite film of silicon nitride and aluminum nitride with a thickness of 500 mm, and the recording film has a structure sandwiched between the above ceramic protective layers.
第１０図は第８図の内周■部拡大図である。５はポリメ
チルメタクリレート基板１１．４１ の内径φ１５ｍ
５＋と同心円状に各基板１１ 、 Ｃの貼り合せ面側に
設けられ次グループである。真空中で芯出しをして貼り
合せ、基板４′側、より露光して第８図に示す記録媒体
とした。グループ５がある為、芯出し軸への紫外線硬化
樹脂の貼り合せ時の付着、及び、露光に於る芯出し軸へ
の固着はなく、均一に基板１′。FIG. 10 is an enlarged view of the inner periphery (■) of FIG. 8. 5 is polymethyl methacrylate substrate 11.41 Inner diameter φ15m
The next group is provided on the bonding surface side of each substrate 11 and C concentrically with 5+. After centering and bonding in vacuum, the substrate 4' side was exposed to light to obtain the recording medium shown in FIG. 8. Because of Group 5, there is no adhesion of the ultraviolet curable resin to the centering shaft during bonding or sticking to the centering shaft during exposure, and the substrate 1' is uniformly coated.
４′を貼り合せる事ができた。I was able to attach 4'.
［実施例３］
第１１図は本発明による実施例である。１＃はエポキシ
基板１．２■厚（トラッキング用溝ピッチ１．６μ悟）
で貼シ合せ面側に記録層部２′を有する。[Example 3] FIG. 11 shows an example according to the present invention. 1# is epoxy board 1.2cm thick (tracking groove pitch 1.6μ)
A recording layer portion 2' is provided on the bonding surface side.
５〃は紫外線吸収剤よシなる接着層であり、宍ＩＫ掲載
する配合より戊っている。４＃は上下面ともに平滑なエ
ポキシ基板１．２■厚である。基板４′は紫外線波長３
６５ｎｍの光を単板状態で１０係以上透過するように紫
外線吸収剤の量わ抑えた材料を用いている。第１２図は
第１１で示し九［Ｆ］部の記録層部の拡大図である。１
２はプリピット及びトラッキング溝をフォトボリメリゼ
ーション法にて３０μ悔厚で形成した層である。６＃は
酸化シリコン膜１０００Ｘ厚、７“は光磁気記録膜（Ｎ
ａＤｙＦｅｃｏ）５００ス厚、８“は酸化シリコン膜１
０００Ｘ厚である。第１３図は第１１図の内周［Ｆ］部
拡太図である。５はエポキシ基板１＃、 ４＃の内径φ
１５■と同心円状に基板４＃の貼り合せ面側に設けられ
九グループである。真空中で芯出しをして貼り合せ基板
４＃側よシ露光して第１１図に示す記録媒体とし次。グ
ループ５がある為、芯出し軸への紫外線硬化樹脂の貼り
合せ時の付着、及び、露光に於る芯出し軸への固着はな
く、均一に基板１１１ 、４＃ ｆ貼シ合せる事ができ
た。5 is an adhesive layer such as a UV absorber, which is different from the formulation published by Shishi IK. 4# is an epoxy board with a thickness of 1.2 cm and smooth on both the top and bottom surfaces. Substrate 4' is UV wavelength 3
A material with a reduced amount of ultraviolet absorber is used to transmit 65 nm light by a factor of 10 or more in a single plate state. FIG. 12 is an enlarged view of the recording layer section of section 9 [F] shown in section 11. 1
2 is a layer in which pre-pits and tracking grooves are formed with a thickness of 30 μm by a photovolimerization method. 6# is a silicon oxide film 1000X thick, 7" is a magneto-optical recording film (N
aDyFeco) 500 mm thick, 8" is silicon oxide film 1
000X thickness. FIG. 13 is an enlarged view of the inner periphery [F] of FIG. 11. 5 is the inner diameter φ of epoxy board 1#, 4#
There are 9 groups arranged concentrically with 15■ on the bonding surface side of substrate 4#. After centering in vacuum, the bonded substrate 4# side was exposed to light to form a recording medium as shown in FIG. 11. Because of Group 5, there is no adhesion of the ultraviolet curable resin to the centering shaft during bonding, and there is no sticking to the centering shaft during exposure, and the substrates 111 and 4#f can be bonded uniformly. Ta.
【実施例４〕
基板内径と同心円状に基板貼り合せ面内周部に形成され
たグループの数、形状が与える影響を検討した光記録媒
体の断面構造図を第１４図、第１５図、第１６図、第１
７図、第１８図、第１９図、第２０図、第２１図、第２
２図、第２３図。[Example 4] Fig. 14, Fig. 15, and Fig. 15 show cross-sectional structural diagrams of an optical recording medium in which the influence of the number and shape of groups formed concentrically with the inner diameter of the substrate on the inner periphery of the substrate bonding surface is examined. Figure 16, 1st
Figure 7, Figure 18, Figure 19, Figure 20, Figure 21, Figure 2
Figures 2 and 23.
第２４図、第２５図に示す。２１はポリカーボネート基
板でありトラッキング用溝ピッチ１．４μ倶溝巾α６μ
偽、厚さ１．２雪である。２２は光磁気記録膜（ＮａＩ
）ｙＦｅｏｏ ）で厚さ５００Ｘの層を窒化シリコン１
ｏｏｏＸの層でサンドイッチした形となっている。２３
は紫外線硬化樹脂よりなる接着層であり配合内容は表Ｉ
Ｋ示しである。２４は上下面が平滑なポリカーボネート
基板で厚さ１．２晴厚である。基板２４は紫外線波長３
６５ｎｍの光を単板状態で１０係以上透過するように紫
外線吸収剤の量を抑えた材料を用いている。先に示した
実施例と同様に真空中で芯出しをして貼り合せ、その後
基板２４側より露光して第１４図〜第２５図に示す光記
録媒体とし次。結果は表２に示す如く、グループ形状が
半円形（図１４〜図１７）。It is shown in FIGS. 24 and 25. 21 is a polycarbonate substrate with a tracking groove pitch of 1.4μ and a groove width of α6μ.
False, the snow is 1.2 thick. 22 is a magneto-optical recording film (NaI
)yFeoo ) to form a layer of 500X thick silicon nitride
It has a sandwiched shape with layers of oooX. 23
is an adhesive layer made of ultraviolet curing resin, and the composition is shown in Table I.
K is indicated. 24 is a polycarbonate substrate with smooth upper and lower surfaces and a thickness of 1.2 mm. The substrate 24 has ultraviolet wavelength 3
A material with a reduced amount of ultraviolet absorber is used so that 65 nm light can be transmitted by a factor of 10 or more in a single plate state. As in the previous embodiment, the materials were centered in a vacuum and bonded together, and then exposed to light from the substrate 24 side to form the optical recording medium shown in FIGS. 14 to 25. As shown in Table 2, the group shape was semicircular (FIGS. 14 to 17).
Ｖ形（図１８〜図２１）、角形（図２２〜図２５）いず
れであっても効果は同じであった。貼り合せ基板２１．
２４の両方にグループがある場合と、２１又は２４のい
ずれかにしかグループがない場合でも効果は同じであっ
た。グループが複数の場合と１つの場合では複数の方が
再現性の点でやや優れてい次。The effect was the same whether it was V-shaped (FIGS. 18 to 21) or square (FIGS. 22 to 25). Bonded substrate 21.
The effect was the same whether there were groups in both 24 or 21 or 24. When comparing the case with multiple groups and the case with one group, the case with multiple groups is slightly better in terms of reproducibility.Next.
表２ グループ形状と貼り合せ再現性の比較性）◎印・
・・２０回貼り合せて全てＯＫＯ印・・・２０回貼り合
せて１８回以上ＯＫ尚、光記録膜としては光磁気記録材
料Ｎ（ｌＤ７ＦθＣＯ１を実施例で示したが、他の光磁
気記録材料、Ｔｂ１ＰｅＣＯ、ＧｄＴｂＦｅ等も使用可
能であり、相変態形光記録膜も使用可能である。接着剤
として実施例では紫外線硬化樹脂を示したが、嫌気性接
着剤、２液硬化型工ポキシ系接着剤、２液硬化型ウレタ
ン基液着剤等、粘度が２０００ｃｐｓ以下のものであれ
ば何でも使用可能である。嫌気性、２液硬化性接着剤を
用いた場合には、貼り合せる２枚の基板それぞれに記録
層部をもつ事が可能となり、貼り合せた光記録媒体両面
よシの情報読み出しが可能である。Table 2 Comparison of group shape and bonding reproducibility)
...Painted 20 times and all marked OK...Pashed 20 times and 18 times or more OK , Tb1PeCO, GdTbFe, etc. can also be used, and a phase change type optical recording film can also be used. Although an ultraviolet curing resin is shown in the example as an adhesive, an anaerobic adhesive, a two-component curing type poxy adhesive can also be used. Any adhesive with a viscosity of 2,000 cps or less can be used, such as adhesives, two-component curable urethane-based adhesives, etc.If an anaerobic, two-component curable adhesive is used, the two substrates to be bonded together may be used. It becomes possible to have a recording layer section on each side, and it is possible to read information from both sides of the bonded optical recording medium.
［発明の効果〕
本発明の内径と同心円状に１つ又は複数の溝を設けた基
板を真空雰囲気中で、２０００ｃｐｓ以下の粘度をもっ
た接着剤を用いて密着貼り合せする事により、貼り合せ
による光学歪を記録媒体に与えず、歩留良く容易に光記
録媒体を製作できる効果があった。又従来の粘着剤を用
いた貼り合せでは不可能だつ次、光記録媒体の透過光に
よる情報読み出しも本発明に従った光記録媒体では光透
過性の良い接着剤を用いる事により容易に製作できる効
果があつ九。[Effects of the Invention] The substrates of the present invention having one or more grooves formed concentrically with the inner diameter are bonded together in a vacuum atmosphere using an adhesive having a viscosity of 2000 cps or less. This has the effect that an optical recording medium can be manufactured easily with good yield without imparting optical distortion to the recording medium. In addition, the optical recording medium according to the present invention can be easily manufactured by using an adhesive with good light transmittance to read information using transmitted light from the optical recording medium, which is impossible with pasting using conventional adhesives. There are nine effects that can be achieved.
第１図は本発明の実施例で光記録媒体の断面構造図。
第２図は第１図■部詳細図。
第３図はｗｃ１図■部詳細図。
第４図は従来の光記録媒体の断面構造図。
第５図は従来構造の基板を真空中で貼り合せ九場合の状
況図。
第６図は本発明構造の基板を真空中で貼υ合せた場合の
状況図。
第７図（ａ）は従来構造の光記録媒体の内周部の複屈折
発生状況図。
第７図（ｂ）は第７図（ａ）のＡ−Ａ断面図。
第８図は本発明の実施例で光記録媒体の断面構造図。
第９図は第８図■部詳細図。
第１０図は第８図■部詳細図。
第１１図は本発明の実施例で光記録媒体の断面構造図。
第１２図は第１１図の［Ｆ］部詳細図。
第１３図は第１１図の［Ｆ］部詳細図。
第１４図〜第２５図は本発明の実施例で光記録媒体の断
面構造図。
以 上
出願人 セイコーエプソン株式会社
易７図
第２０
名３図
躬７図（２）
第８０
躬ＩＪ
粘１０回
蕗１４．図
躬１５０
名ＩＧ ｍ
藝ｔ１ Ｏ
易１８図
葛１’？ Ｚ
葛２０図
葛２１ノ
名２２０
擦、２３７
葛長田
葛２５図FIG. 1 is a cross-sectional structural diagram of an optical recording medium according to an embodiment of the present invention. Figure 2 is a detailed view of part ■ in Figure 1. Figure 3 is a detailed view of part ■ of wc1. FIG. 4 is a cross-sectional structural diagram of a conventional optical recording medium. FIG. 5 is a diagram showing the situation when two conventionally structured substrates are bonded together in a vacuum. FIG. 6 is a diagram showing the situation when substrates having the structure of the present invention are bonded together in a vacuum. FIG. 7(a) is a diagram showing the occurrence of birefringence in the inner circumference of an optical recording medium with a conventional structure. FIG. 7(b) is a sectional view taken along the line AA in FIG. 7(a). FIG. 8 is a cross-sectional structural diagram of an optical recording medium according to an embodiment of the present invention. Figure 9 is a detailed view of part ■ in Figure 8. Figure 10 is a detailed view of part ■ in Figure 8. FIG. 11 is a cross-sectional structural diagram of an optical recording medium according to an embodiment of the present invention. FIG. 12 is a detailed view of part [F] in FIG. 11. FIG. 13 is a detailed view of part [F] in FIG. 11. 14 to 25 are cross-sectional structural diagrams of optical recording media according to embodiments of the present invention. Applicant: Seiko Epson Co., Ltd. Figure 7 (20) Figure 3 (2) Figure 7 (2) No. 80 (IJ) 10th Fuki 14. Figure 150 Name IG m Art t1 O Easy 18 Figure Kuzu 1'? Z Kudzu 20 figures Kudzu 21 name 220 Rub, 237 Kudzu Nagata Kudzu 25 figures
Claims (1)
いる密着貼り合せ構造で、その２枚の基板の少なくとも
一方の内周貼り合せ面に、基板内径と同心円状に１つ又
は複数の溝を設けた事を特徴とする光記録媒体。This is a close bonding structure in which the information recording layer portion is formed on the bonding surface side of two substrates, and one or An optical recording medium characterized by having a plurality of grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61206505A JPS6363146A (en) | 1986-09-02 | 1986-09-02 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61206505A JPS6363146A (en) | 1986-09-02 | 1986-09-02 | Optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6363146A true JPS6363146A (en) | 1988-03-19 |
Family
ID=16524477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61206505A Pending JPS6363146A (en) | 1986-09-02 | 1986-09-02 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6363146A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0844608A2 (en) * | 1996-11-20 | 1998-05-27 | Taiyo Yuden Co., Ltd. | Optical information medium |
| USRE39412E1 (en) | 1995-02-15 | 2006-11-28 | Matsushita Electric Industrial Co., Ltd. | Optical information medium, and method and apparatus for fabricating the same |
-
1986
- 1986-09-02 JP JP61206505A patent/JPS6363146A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE39412E1 (en) | 1995-02-15 | 2006-11-28 | Matsushita Electric Industrial Co., Ltd. | Optical information medium, and method and apparatus for fabricating the same |
| EP0844608A2 (en) * | 1996-11-20 | 1998-05-27 | Taiyo Yuden Co., Ltd. | Optical information medium |
| EP0844608A3 (en) * | 1996-11-20 | 1999-09-08 | Taiyo Yuden Co., Ltd. | Optical information medium |
| US6445676B1 (en) | 1996-11-20 | 2002-09-03 | Taiyo Yuden Co., Ltd. | Optical information medium |
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