JPS62189652A - Photomagnetic recording medium - Google Patents
Photomagnetic recording mediumInfo
- Publication number
- JPS62189652A JPS62189652A JP3251586A JP3251586A JPS62189652A JP S62189652 A JPS62189652 A JP S62189652A JP 3251586 A JP3251586 A JP 3251586A JP 3251586 A JP3251586 A JP 3251586A JP S62189652 A JPS62189652 A JP S62189652A
- Authority
- JP
- Japan
- Prior art keywords
- recording layer
- agent
- acrylic
- photomagnetic
- 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
- 239000003522 acrylic cement Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 abstract description 21
- 239000000758 substrate Substances 0.000 abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000000178 monomer Substances 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 description 18
- 239000010408 film Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920006332 epoxy adhesive Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 plated surfaces 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
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
イ、産業上の利用分野
本発明は光磁気記録媒体、特（＝磁気光学記憶素子に関
するものである。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a magneto-optical recording medium, and in particular to a magneto-optical storage element.
口、従来技術
近年、磁気光学効果を用いて消去可能な光記録を行なう
、いわゆる光磁気記録媒体が産業界で注目を集め、活発
な研究開発が行われている。BACKGROUND OF THE INVENTION In recent years, so-called magneto-optical recording media that perform erasable optical recording using the magneto-optic effect have attracted attention in industry, and active research and development is being carried out.
この方式では記録、再生時に、１ミクロン程に集束させ
たレーザー光を用いるため、空気中の塵埃の影響を受け
ない様に、１ミリ程の厚みの透明基板に膜を形成し、基
板側よりレーザー光の照射を行なう方法がとられる。
それゆえ、記録膜を形成した面同士を内側として、２枚
を貼り合せる構成にすることが可能であり、これにより
、記録膜が傷つけられたり、汚れたりするのを防ぐこと
ができる。Since this method uses a laser beam focused to about 1 micron during recording and playback, a film is formed on a transparent substrate about 1 mm thick to prevent it from being affected by dust in the air. A method of irradiating with laser light is used.
Therefore, it is possible to have a structure in which two sheets are pasted together with the surfaces on which the recording films are formed on the inside, and thereby the recording films can be prevented from being damaged or soiled.
この貼り合せの方法としては、２通りの方法が知られて
いる。 一つは、２つの基板をスペーサーを介して貼り
合せる方法であり、第２図に示すように、記録膜１の形
成されていない部分で、内外周２つのスペーサ２．３を
介して貼り合せている。Two methods are known for this bonding method. One method is to bond two substrates together via a spacer, and as shown in FIG. ing.
しかし、この方法では、基板４−５間の接着面積（６は
接着剤）が小さいために十分な機械強度が得られず、ま
た、作成工程が複雑となり、スペーサという部品が必要
なのでコスト高となる。 これ：＝対し、２枚の全面を
貼り合せる方法では、これらの問題はなく、より有利な
方法である。However, with this method, sufficient mechanical strength cannot be obtained because the adhesive area between the substrates 4 and 5 (6 is the adhesive) is small, and the manufacturing process is complicated and a part called a spacer is required, resulting in high costs. Become. In contrast, the method of bonding two entire surfaces together does not have these problems and is a more advantageous method.
この全面の貼り合せに用いる接着剤は、−族ヰであり、
オーブンタイムが長く、作業性が有利なことから、紫外
線硬化型接着剤が広く使用されている。 しかしながら
、光磁気記録に一般的に用いられているＧｄ、Ｔｂ、Ｆ
ｅなどの金属薄膜は、その実用的な膜厚では紫外線をほ
とんど透過しない。 したがって、この薄膜を設けた基
板同士を紫外線硬化接着剤で接着することは不可能であ
る。The adhesive used for bonding the entire surface is -group I,
UV-curable adhesives are widely used because they have long oven times and are easy to work with. However, Gd, Tb, and F, which are commonly used for magneto-optical recording,
A metal thin film such as e, at its practical thickness, hardly transmits ultraviolet rays. Therefore, it is impossible to bond substrates provided with this thin film to each other using an ultraviolet curing adhesive.
他に考えられる接着剤としては、２液温合型のエポキシ
接着剤、熱硬化型エポキシ接着剤、ホットメルト粘着型
接着剤などがあげられる。 しかし、２液温合型は、計
量、混合といった工程が必要であり、可使時間が短い欠
点をもつ。 熱硬化型では、硬化時の熱により、支持基
板たとえばポリメチルメタクリレート、ポリカーボネー
トが劣化したり、あるいは、記録膜が酸化されたりする
。Other possible adhesives include two-component thermal epoxy adhesives, thermosetting epoxy adhesives, hot melt adhesives, and the like. However, the two-liquid heating type requires steps such as measuring and mixing, and has the disadvantage of a short pot life. In the thermosetting type, the heat during curing deteriorates the support substrate, such as polymethyl methacrylate or polycarbonate, or oxidizes the recording film.
ホットメルト粘着型は、粘着剤の塗布に大型の装置が必
要であり、また、その性能が加熱溶融中に劣化しやすく
、管理が難しいなどの欠点をもつ。The hot-melt adhesive type requires large equipment to apply the adhesive, and its performance tends to deteriorate during heating and melting, making it difficult to manage.
ハ０発明の目的
本発明の目的は、光磁気記録層の特性を損わないように
、常温で短時間に生産性良く作製できる媒体を提供する
ことにある。OBJECT OF THE INVENTION An object of the present invention is to provide a medium that can be manufactured with high productivity in a short time at room temperature without impairing the characteristics of the magneto-optical recording layer.
二９発明の構成及びその作用効果
即ち、本発明は、特にレーザー光により情報の記録、再
生又は消去が可能であって少なくとも磁気光学効果を有
する光磁気記録層を支持体に設けてなる媒体同士が、常
温速硬化型のアクリル系接着剤によって互いに接合せし
められて形成された光磁気記録媒体に係るものである。29 Structure of the invention and its effects, that is, the present invention particularly provides for a medium in which a support is provided with a magneto-optical recording layer capable of recording, reproducing or erasing information using a laser beam and having at least a magneto-optic effect. These relate to magneto-optical recording media formed by bonding them together using an acrylic adhesive that cures quickly at room temperature.
本発明によれば、媒体同士（具体的には光磁気記録層の
ある側）を接合するの１＝、常温速硬化型のアクリル系
接着剤（以下、本発明の接着剤と称する。）を用いてい
るので、接着を単Ｃ二常温にてしかも高速に行なうこと
ができ、記録層の熱劣化を生じることがない。According to the present invention, for bonding the media (specifically, the sides with the magneto-optical recording layer), an acrylic adhesive that cures quickly at room temperature (hereinafter referred to as the adhesive of the present invention) is used. Because of this, adhesion can be carried out at room temperature and at high speed, without causing thermal deterioration of the recording layer.
こうした本発明の接着剤として好適なものは、２波型変
性アクリル系接着剤（セメダイン社製又はデエボン社製
の５ＧＡ）であり、これはエラストマーとアクリル系モ
ノマーとの混合物をレドックス型の硬化機構で急速硬化
するものである。A suitable adhesive of the present invention is a two-wave modified acrylic adhesive (5GA manufactured by Cemedine or Devon), which uses a redox type curing mechanism to cure a mixture of an elastomer and an acrylic monomer. It hardens rapidly.
これには、プライマー型と２液主剤型とがあるが、性能
安定性等の点で２液主剤型の方がよいことがある。 こ
のＳＧＡの特長をまとめると、次の如くである。There are two types: primer type and two-liquid base type, but the two-liquid base type is sometimes better in terms of performance stability and the like. The features of this SGA are summarized as follows.
（１）、室温速硬性である。(1) Rapid hardening at room temperature.
ラインの高速化やストックの減少をはかることができる
。It is possible to speed up the line and reduce stock.
（２）、接着性能のバランスがよい。(2) Good balance in adhesive performance.
せん断強度、剥離強度、衝撃強度が大きく、構造用接着
剤に近い性能を有している。It has high shear strength, peel strength, and impact strength, and has performance similar to that of structural adhesives.
（３）、２液非混合接着が可能である。(3) Two-liquid non-mixable adhesion is possible.
ＳＧＡは２液型であるが、計量や混合をしなくてもよい
接着強度が得られる。Although SGA is a two-component type, adhesive strength can be obtained without the need for measuring or mixing.
（４）、広範囲の材料を接着できる。(4) A wide range of materials can be bonded.
金属、メッキ面、プラスチックス、木材、セラミックス
など広い材料の接着や、異種材料の接着が可能である。It is possible to bond a wide range of materials such as metals, plated surfaces, plastics, wood, and ceramics, as well as bond different materials.
（５）、耐熱性、耐寒性がよい。(5) Good heat resistance and cold resistance.
一４０〜１５０℃の範囲で使用することができる。It can be used within the range of -40 to 150°C.
（６）、耐久性がよい。(6) Good durability.
ＳＧＡは耐候性や環境特性がよく、耐久性のよい接着剤
である。SGA is a durable adhesive with good weather resistance and environmental properties.
（７）、オープンタイムを自由にとれる。(7) You can have open time freely.
オリゴマーで変性した場合、塗布複数時間放置しても強
度が変わらない。When modified with oligomers, the strength does not change even if the coating is left for several hours.
０φ、低臭気、低刺激である。0φ, low odor, and low irritation.
使用する触媒系は多種類のモノマーやオリゴマーを、非
常に速く重合させることができるため、広範囲の組成を
くむことができ、オリゴマー主成分の接着剤が可能とな
る。 また、必要があればモノマーを使うこともでき、
使う場合もモノマー量を少量君ニすることができるため
、低臭気で低刺激の接着剤となる。Since the catalyst system used is capable of polymerizing a wide variety of monomers and oligomers very rapidly, a wide range of compositions can be achieved, making it possible to create adhesives based on oligomers. Also, monomers can be used if necessary.
When used, the amount of monomer can be controlled in small quantities, resulting in a low-odor, low-irritant adhesive.
また、上記光磁気記録層は、膜面し垂直方向シー磁化容
易軸を有するものであって、光ビームによって情報の記
録、再生又は消去が可能であり、公知の材質、即ちＴｂ
Ｆｅ％ＧｄＦｅ、ＧｄＴｂＦｅＣσ、ＧｄＣｏ等の希土
類−遷移金属アモルファス合金で構成することができる
。 その製膜には、公知のようにスパッタリングを採用
してよい。The magneto-optical recording layer has a film surface and has an easy axis of shear magnetization in the perpendicular direction, can record, reproduce, or erase information using a light beam, and is made of a known material such as Tb.
It can be composed of a rare earth-transition metal amorphous alloy such as Fe%GdFe, GdTbFeCσ, and GdCo. Sputtering, as is well known, may be used for forming the film.
また、この光磁気記録層上には、誘電体膜が設けられて
よいが、こうした誘電体としては、Ｓｉ３Ｎ４をはじめ
ＡｔＮ、Ｓｉｎｇ、ＺｎＳ、ＩＴＯ（Ｉｎｄｉｕｍ Ｔ
ｉｎ ０ｘｉｄｅ ）等が挙げられる。 この誘電体膜
はスパッタリングによって光磁気記録層上（二積層して
設けることができるが、光磁気記録層と基板との間にも
設けて光磁気記録層な誘電体膜でサンドイッチした構造
としてもよい。Further, a dielectric film may be provided on this magneto-optical recording layer, and examples of such a dielectric include Si3N4, AtN, Sing, ZnS, ITO (Indium T
in Oxide), etc. This dielectric film can be provided by sputtering on the magneto-optical recording layer (two layers stacked together), but it can also be provided between the magneto-optical recording layer and the substrate and sandwiched between the magneto-optical recording layer and the dielectric film. good.
このサンドイッチ構造にすれば、基板として樹脂基板を
用いるときに生じがちな基板からの酸素の収り込みが膜
形成時に生じ難くなるので、有利であると考えられる。This sandwich structure is considered to be advantageous because the entrapment of oxygen from the substrate, which tends to occur when a resin substrate is used as the substrate, is less likely to occur during film formation.
第１図は、基板１１上に光磁気記録層１６と誘電体膜１
２および１４とが積層された媒体１５の２個分を、上述
したＳＧＡからなる接着剤１６で互いに接合せしめてな
る、本発明に基づく光磁気記録媒体の一例を示すもので
ある。 なお、上記接合前に、各記録層上にこの紫外線
硬化樹脂を塗布し、硬化させておけば、下地の保護を図
れる。FIG. 1 shows a magneto-optical recording layer 16 and a dielectric film 1 on a substrate 11.
This figure shows an example of a magneto-optical recording medium according to the present invention, in which two media 15 in which 2 and 14 are laminated are bonded to each other with an adhesive 16 made of the above-mentioned SGA. Note that if this ultraviolet curable resin is applied and cured on each recording layer before the above bonding, the underlying layer can be protected.
ホ、実施例 以下、本発明を実施例について更に詳細に説明する。E, Example Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例
アクリル基板（φ１２０．１．２ｍ厚）にＡｔＮ膜、Ｇ
ｄ Ｔ ｂ Ｆｅ膜、Ａ４Ｎ膜を５００ Ａずつスパ
ッタリングで成膜し、紫外線硬化樹脂を保護膜としてス
ピンコードにより１０μ露厚に塗布して硬化させた。Example AtN film, G on acrylic substrate (φ120.1.2m thick)
d T b Fe film and A4N film were each formed by sputtering at 500 A, and an ultraviolet curing resin was applied as a protective film to a thickness of 10 μm using a spin cord and cured.
これを２枚用意し、片面の保護膜上にセメダイン社製の
接触硬化型アクリル系接着剤５ＧＡ−１の主剤を２０μ
謀塗布し、もう一方にプライマーを同じ＜２０μ講厚に
塗布し、ただちに重ね合わせて硬化させ、接着した。
約５分で十分な接着強度が得られた。 このディスクに
情報を記録、再生したところ、ビット誤り率は２×１０
であった。Prepare two sheets of this, and apply 20μ of the main agent of contact curing acrylic adhesive 5GA-1 manufactured by Cemedine Co., Ltd. on the protective film on one side.
One layer was coated on the other, and the other layer was coated with primer to the same thickness of <20 μm, and immediately overlapped, cured, and bonded.
Sufficient adhesive strength was obtained in about 5 minutes. When information was recorded and played back on this disk, the bit error rate was 2 x 10
Met.
比較例
上側と同じに用意した基板に、スリーボンド社製熱硬化
型エポキシ接着剤スリーボンド２０６７を塗布し、２枚
を貼り合せた後、１２０℃で４５分間加熱して硬化させ
た。このディスクのビット誤り率は２Ｘ１０−”であっ
た。 これは、熱による基板の変形や、記録膜の劣化Ｃ
二よるものである。A thermosetting epoxy adhesive, ThreeBond 2067 manufactured by ThreeBond, was applied to a substrate prepared in the same manner as the upper side of the comparative example, and after bonding the two sheets together, it was cured by heating at 120° C. for 45 minutes. The bit error rate of this disk was 2X10-''. This is due to deformation of the substrate due to heat and deterioration of the recording film.
It depends on two things.
以上、本発明を例示したが、上述の例は本発明の技術的
思想に基づいて更に変形可能である。Although the present invention has been illustrated above, the above-mentioned example can be further modified based on the technical idea of the present invention.
第１図は本発明の実施例Ｃ＝よる光磁気記録媒体の一部
分の拡大断面図、第２図は従来のエアーサンドイッチ構
造の光ディスクの断面図である。
なお、図面に示す符号において、
１１・・・・・・・・・・・・基板
１２．１４・・・・・・・・誘電体膜
１６・・・・・・・・・・・・光磁気記録層１５・・・
・・・・・・・・・媒体
ｆ６・・・・・・・・・・・・接着剤（５ＧＡ）である
。
代理人 弁理士 逢 坂 宏
箪１図FIG. 1 is an enlarged sectional view of a portion of a magneto-optical recording medium according to Example C of the present invention, and FIG. 2 is a sectional view of a conventional optical disk having an air sandwich structure. In addition, in the symbols shown in the drawings, 11......Substrate 12.14...Dielectric film 16...Light Magnetic recording layer 15...
. . . Medium f6 . . . Adhesive (5GA). Agent Patent Attorney Kotan Aisaka 1
Claims (1)
温速硬化型のアクリル系接着剤によって互いに接合せし
められて形成された光磁気記録媒体。1. A magneto-optical recording medium formed by bonding media each having a magneto-optical recording layer on a support using an acrylic adhesive that cures quickly at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3251586A JPS62189652A (en) | 1986-02-17 | 1986-02-17 | Photomagnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3251586A JPS62189652A (en) | 1986-02-17 | 1986-02-17 | Photomagnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62189652A true JPS62189652A (en) | 1987-08-19 |
Family
ID=12361106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3251586A Pending JPS62189652A (en) | 1986-02-17 | 1986-02-17 | Photomagnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62189652A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154058A (en) * | 1984-08-23 | 1986-03-18 | Canon Inc | Photomagnetic recording medium |
-
1986
- 1986-02-17 JP JP3251586A patent/JPS62189652A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154058A (en) * | 1984-08-23 | 1986-03-18 | Canon Inc | Photomagnetic recording medium |
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