JPH01276452A - Magneto-optical recording element - Google Patents
Magneto-optical recording elementInfo
- Publication number
- JPH01276452A JPH01276452A JP10369588A JP10369588A JPH01276452A JP H01276452 A JPH01276452 A JP H01276452A JP 10369588 A JP10369588 A JP 10369588A JP 10369588 A JP10369588 A JP 10369588A JP H01276452 A JPH01276452 A JP H01276452A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- optical recording
- resin
- recording element
- substrate
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 229920002050 silicone resin Polymers 0.000 claims abstract description 20
- 239000004033 plastic Substances 0.000 claims abstract description 14
- 239000004840 adhesive resin Substances 0.000 claims description 24
- 229920006223 adhesive resin Polymers 0.000 claims description 24
- 229920005989 resin Polymers 0.000 abstract description 27
- 239000011347 resin Substances 0.000 abstract description 27
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 229920001651 Cyanoacrylate Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- BTHCBXJLLCHNMS-UHFFFAOYSA-N acetyloxysilicon Chemical compound CC(=O)O[Si] BTHCBXJLLCHNMS-UHFFFAOYSA-N 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910000982 rare earth metal group alloy Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 229910000687 transition metal group alloy Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は２種類の基板を備えた光磁気記録素子並びに２
種類の光磁気記録部材を貼り合わせて成る光磁気記録素
子に関するものでる。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a magneto-optical recording element having two types of substrates and a
This article relates to a magneto-optical recording element formed by laminating different types of magneto-optical recording members.
近時、希土類金属と遷移金属から成る非晶質金属合金を
用いた高密度光磁気記録が盛んに研究されており、その
記録方式は集束レーザー光を記録媒体に投光して局部加
熱し、これによってビットを書き込み、次に磁気光学効
果を利用して読み出しており、更に記録ビットを消去し
、改めてビットを書き込むこともできる。Recently, high-density magneto-optical recording using amorphous metal alloys made of rare earth metals and transition metals has been actively researched.The recording method is to project a focused laser beam onto the recording medium to locally heat it. This allows bits to be written and then read using the magneto-optic effect, and it is also possible to erase the recorded bits and write the bits again.
このような光磁気記録方式においては、第４図に示すよ
うに２種類の光磁気記録部材を接着用樹脂層を介して貼
り合わせ、その光磁気記録の利用度を著しく高めること
ができる。In such a magneto-optical recording system, two types of magneto-optical recording members are bonded together via an adhesive resin layer as shown in FIG. 4, and the utilization of the magneto-optical recording can be significantly increased.
同図において、基板１ａの上に磁性体Ｎ２ａ、紫外線硬
化型保護樹脂層３ａが順次積層して成る光磁気記録部材
Ａがつくられており、一方、基板１ｂの上に磁性体層２
ｂ、紫外線硬化型保護樹脂層３ｂが順次積層して成る光
磁気記録部材Ｂがつくられており、両者の記録部材Ａ、
Ｂは接着用樹脂層４を介して貼り合わされている。そし
て、このような光磁気記録素子においては、基板１ａ又
は基板１ｂより集束レーザー光を投光して記録・再生・
書き換えを行うことができる。In the figure, a magneto-optical recording member A is fabricated by sequentially laminating a magnetic material N2a and an ultraviolet curable protective resin layer 3a on a substrate 1a, while a magnetic material layer 2 is formed on a substrate 1b.
b. A magneto-optical recording member B is made by sequentially laminating ultraviolet curable protective resin layers 3b, and both recording members A,
B is bonded together with an adhesive resin layer 4 interposed therebetween. In such a magneto-optical recording element, a focused laser beam is projected from the substrate 1a or the substrate 1b for recording, reproducing, and
Can be rewritten.
上記構成の光磁気記録素子に用いられる接着用樹脂層４
には紫外線硬化型樹脂やエポキシ系、アクリル系、ウレ
タン系、シアノアクリレート系などの樹脂接着剤が使用
されている。Adhesive resin layer 4 used in the magneto-optical recording element having the above structure
UV-curable resins, epoxy-based, acrylic-based, urethane-based, and cyanoacrylate-based resin adhesives are used.
しかしながら、これらの樹脂を紫外線硬化型保護樹脂層
３ａ、３ｂの上に塗布し、次いで硬化させた場合、その
硬化に伴って樹脂層４が収縮し、この樹脂層４及び保護
樹脂層３ａ、３ｂに応力歪みが生じ、これにより、磁性
体層２ａ 、 ２ｂに応力腐蝕が発生し、その結果、光
磁気記録特性が経時的に劣化する。However, when these resins are applied onto the UV-curable protective resin layers 3a, 3b and then cured, the resin layer 4 shrinks as it cures, causing the resin layer 4 and the protective resin layers 3a, 3b to shrink. Stress distortion occurs in the magnetic layers 2a and 2b, which causes stress corrosion in the magnetic layers 2a and 2b, and as a result, the magneto-optical recording characteristics deteriorate over time.
また、この光磁気記録素子に複屈折がある基板１ａ、ｌ
ｂを用いた場合には上記応力に起因して複屈折が増加し
、その結果、光磁気記録の初期特性が劣化する。Moreover, the substrates 1a and l having birefringence in this magneto-optical recording element
When b is used, birefringence increases due to the above stress, and as a result, the initial characteristics of magneto-optical recording deteriorate.
上記樹脂層４に熱可塑性樹脂から成るホントメルト型接
着剤を用いた場合には上記問題点が解決されるが、その
反面、この接着剤は高温環境下で軟化並びに流動し、そ
のために接着性能が著しく劣る。If a true melt adhesive made of thermoplastic resin is used for the resin layer 4, the above problems can be solved, but on the other hand, this adhesive softens and flows in a high temperature environment, resulting in poor adhesive performance. is significantly inferior.
また、上記接着用樹脂Ｎ４には、磁性体層２ａ、２ｂを
腐蝕させず、しかも、基＋Ｈ１ａ、ｌｂを化学的に劣化
させない樹脂を用いるのがよく、この場合には光磁気記
録特性が損なわれない。Further, as the adhesive resin N4, it is preferable to use a resin that does not corrode the magnetic layers 2a and 2b and also does not chemically deteriorate the groups +H1a and lb. In this case, the magneto-optical recording characteristics are impaired. Not possible.
従って本発明は上記事情に濫みて完成されたものであり
、その目的は光磁気記録部材に応力歪みが生じなくなり
、これによって優れた光磁気記録特性が得られると共に
その初期特性が維持された光磁気記録素子を提供するこ
とにある。Therefore, the present invention was completed in the light of the above circumstances, and its purpose is to prevent stress distortion from occurring in the magneto-optical recording member, thereby obtaining excellent magneto-optical recording characteristics, and to provide an optical system that maintains its initial characteristics. An object of the present invention is to provide a magnetic recording element.
また本発明の他の目的は光磁気記録素子に用いられる樹
脂接着剤が磁性体層や基板などを侵さず、これによって
高品質且つ高信頼性の光磁気記録素子を提供することに
ある。Another object of the present invention is to provide a magneto-optical recording element of high quality and reliability in which the resin adhesive used in the magneto-optical recording element does not attack the magnetic layer or substrate.
本発明によれば、プラスチック製第１基板上に少なくと
も磁性体層、接着用樹脂層及び第２基板が順次形成され
た光磁気記録素子において、前記接着用樹脂層が脱アル
コール型シリコーン系樹脂から成り且つ弾性率が１．５
Ｘ １０’ｄｙｎ／ｃｍ”以下に設定されていること
を特徴とする光磁気記録素子が提供される。According to the present invention, in the magneto-optical recording element in which at least a magnetic layer, an adhesive resin layer, and a second substrate are sequentially formed on a first plastic substrate, the adhesive resin layer is made of dealcoholized silicone resin. and the elastic modulus is 1.5
Provided is a magneto-optical recording element characterized in that the magnetic field is set to less than X 10'dyn/cm''.
また本発明によれば、プラスチック製基板上に少な（と
も磁性体層を形成して成る第１光磁気記録部材、プラス
チック製基板上に少なくとも磁性体層を形成して成る第
２光磁気記録部材、並びに第１光磁気記録部材と第２光
磁気記録部材を貼り合わせるための接着用樹脂層から成
る光磁気記録素子において、前記接着用樹脂層が脱アル
コール型シリコーン系樹脂から成り且つ弾性率が１．５
×１０’ｄｙｎ／ｃｍ”以下に設定されていることを特
徴とする光磁気記録素子が提供される。Further, according to the present invention, a first magneto-optical recording member is formed by forming at least a magnetic layer on a plastic substrate, and a second magneto-optical recording member is formed by forming at least a magnetic layer on a plastic substrate. , and a magneto-optical recording element comprising an adhesive resin layer for bonding a first magneto-optical recording member and a second magneto-optical recording member, wherein the adhesive resin layer is made of a dealcoholization type silicone resin and has an elastic modulus of 1.5
Provided is a magneto-optical recording element characterized in that the magnetic flux density is set to 10'dyn/cm" or less.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
第１図は本発明光磁気記録素子の個々の光磁気記録部材
であり、第２図はその光磁気記録部材を貼り合わせた場
合の基本的な層構成を示す。FIG. 1 shows individual magneto-optical recording members of the magneto-optical recording element of the present invention, and FIG. 2 shows the basic layer structure when the magneto-optical recording members are bonded together.
第１図によれば、プラスチック製基板ＩＣの上に磁性体
層２ｃを形成して成る光磁気記録部材Ｃが作られており
、一方、プラスチック製基板１ｄの上に磁性体層２ｄを
形成して成る光磁気記録部材りも作られている。According to FIG. 1, a magneto-optical recording member C is manufactured by forming a magnetic layer 2c on a plastic substrate IC, and on the other hand, a magnetic layer 2d is formed on a plastic substrate 1d. Magneto-optical recording members are also made.
次に磁性体層２ｃ、２ｄの少なくとも一方の層に接着用
樹脂５を塗布し、室温下における自然硬化あるいは加熱
により硬化させると第２図に示す通りの光磁気記録素子
が得られる。Next, an adhesive resin 5 is applied to at least one of the magnetic layers 2c and 2d and cured naturally at room temperature or by heating to obtain a magneto-optical recording element as shown in FIG.
本発明においては、上記接着用樹脂層５を脱アルコール
型シリコーン系樹脂により形成し、しかも、弾性率を所
定の範囲内に設定し、これにより、樹脂層５に応力歪み
が生じなくなり、磁性体層２ｃ、２ｄに応力腐蝕が発生
しな（なる。In the present invention, the adhesive resin layer 5 is formed of a dealcoholized silicone resin, and the elastic modulus is set within a predetermined range, so that stress distortion does not occur in the resin layer 5, and the magnetic material Stress corrosion does not occur in layers 2c and 2d.
脱アルコール型シリコーン系樹脂は縮合型シリコーン系
樹脂の一種であり、この縮合型シリコーン系樹脂は主成
分であるシラノールと架橋剤との加水分解縮合反応によ
り硬化され、そして、その架橋剤にアルコキシシラン、
アセトキシシラン、エノキシシランなどを用いることに
よりそれぞれアルコール、酢酸、ケトンなどの縮合副生
物ができる。従って、縮合副生物の種類に対応して脱ア
ルコール型シリコーン系樹脂、脱酢酸型シリコーン系樹
脂、脱アセトン型シリコーン系樹脂などに区別される。Dealcoholization type silicone resin is a type of condensation type silicone resin, and this condensation type silicone resin is cured by a hydrolytic condensation reaction between silanol, which is the main component, and a crosslinking agent, and then alkoxysilane is added to the crosslinking agent. ,
By using acetoxysilane, enoxysilane, etc., condensation by-products such as alcohol, acetic acid, and ketone are produced respectively. Accordingly, they are classified into dealcoholization type silicone resins, acetic acid removal type silicone resins, acetone removal type silicone resins, etc., depending on the type of condensation by-product.
本発明者等は種々の実験を繰り返し行った結果、上記縮
合型シリコーン系樹脂のなかで脱アルコール型シリコー
ン系樹脂を選択し、これを接着用樹脂層５に用いた場合
、磁性体層２ｃ、２ｄを腐蝕させたり、基板１ｃ、 ｌ
ｄを侵さないことを見い出した。As a result of repeated various experiments, the present inventors selected a dealcoholization type silicone resin among the above condensation type silicone resins, and when this was used for the adhesive resin layer 5, the magnetic layer 2c, 2d, or corrode the substrates 1c and l.
It was discovered that the method does not violate d.
即ち、脱酢酸型シリコーン系樹脂を用いた場合には磁性
体層２ｃ、２ｄを腐蝕させ、また、脱アセトン型シリコ
ーン系樹脂については基板１ｃ＋１ｄ＋特にポリカーボ
ネート樹脂基板やアクリル樹脂基板が侵食されることを
見い出した。That is, when an acetic acid-free silicone resin is used, the magnetic layers 2c and 2d are corroded, and when an acetone-free silicone resin is used, the substrates 1c+1d+especially the polycarbonate resin substrate and the acrylic resin substrate are corroded. I found it.
また、上記脱アルコール型シリコーン系樹脂を用いるに
当たって、その分子構造中の有機基Ｒの種類並びに重合
度及び架橋密度を変えることにより弾性率を所定の範囲
内に設定する。Furthermore, when using the dealcoholization type silicone resin, the elastic modulus is set within a predetermined range by changing the type of organic group R in its molecular structure, the degree of polymerization, and the crosslinking density.
この弾性率を１．５ Ｘ １０’ｄｙｎ／ｃｍ”以下、
好適には１．０ Ｘ １０’ｄｙｎ／ｃｍ”以下に設定
した場合、接着用樹脂層５と磁性体層２ｃ、２ｄの界面
に生じる応力が小さくなり、しかも、応力腐蝕がなく、
また、プラスチック製基板１ｃ、 ｌｄの複屈折が増加
する等の悪影響を受けなくなる。This elastic modulus is 1.5 x 10'dyn/cm" or less,
When it is preferably set to 1.0 x 10'dyn/cm" or less, the stress generated at the interface between the adhesive resin layer 5 and the magnetic layers 2c and 2d is small, and there is no stress corrosion.
Further, the plastic substrates 1c and ld are not affected by adverse effects such as an increase in birefringence.
また、磁性体層２ｃ、２ｄは膜面に垂直な方向に磁化容
易軸を有する非晶質金属垂直磁化膜であり、例えばＴｂ
Ｆｅ、 ＧｄＣｏ、 ＴｂＦｅＣｏ、 ＧｄＤｙＦｅ、
ＤｙＦｅＣｏ、 ＧｄＴｂＦｅＣｏ、ＧｄＤｙＦｅＣ
ｏなどの希土類金属−遷移金属の合金から成る薄膜があ
る。The magnetic layers 2c and 2d are amorphous metal perpendicularly magnetized films having an axis of easy magnetization in a direction perpendicular to the film surface, and are, for example, Tb
Fe, GdCo, TbFeCo, GdDyFe,
DyFeCo, GdTbFeCo, GdDyFeC
There are thin films made of alloys of rare earth metals and transition metals such as o.
基板１ｃ、ｌｄにはプラスチック板が用いられ、このプ
ラスチック基板用材料としてポリカーボネート樹脂、エ
ポキシ樹脂、ポリエステル樹脂、アクリル樹脂などがあ
る。Plastic plates are used for the substrates 1c and ld, and materials for the plastic substrate include polycarbonate resin, epoxy resin, polyester resin, acrylic resin, and the like.
また本発明の光磁気記録素子においては、基板ｌｃ、
ｔｄと磁性体層２ｃ、２ｄの間に誘電体層を形成しても
よく、これにより、基板側よりレーザー光を投光させる
とエンハンスメント効果によりみかけのカー回転角を増
大させて性能指数を高めることができる。Further, in the magneto-optical recording element of the present invention, the substrate lc,
A dielectric layer may be formed between td and the magnetic layers 2c and 2d, so that when a laser beam is emitted from the substrate side, the apparent Kerr rotation angle is increased due to an enhancement effect, thereby increasing the figure of merit. be able to.
この誘電体層はサイアロン、ＳｉＮ＋ＡＩＮ、５ｉＣｔ
ＣｄＳ、Ｔｉｃ、 ＴｉＮ、 ＺｎＳ＋ ＭｇＦｚ＋
Ａｌ２Ｏ３＋ ＣｅＯ，Ｚｒ０ｚ ＋ Ｓｉｎ、 ５ｉ
Ｏｚ＋ ＣｄＯ、ＢｉｚＯ＋などの材料により形成され
る。This dielectric layer is Sialon, SiN+AIN, 5iCt
CdS, Tic, TiN, ZnS+ MgFz+
Al2O3+ CeO, Zr0z + Sin, 5i
Oz+ is formed from a material such as CdO or BizO+.
更に、磁性体層２ｃ、２ｄと樹脂層５の間に上記誘電体
層用材料又はＴ ｉ Ｉ Ｃｒ Ｉ Ｚｒ ＋ Ｔａ
＋ Ａ Ｉ等の耐食性金属あるいはそれらの酸化物、窒
化物、炭化物、硫化物などの化合物を単独で又は組合せ
て成る非磁性体層を形成してもよい。Further, between the magnetic layers 2c, 2d and the resin layer 5, the above dielectric layer material or T i I Cr I Zr + Ta
A non-magnetic layer may be formed of a corrosion-resistant metal such as +A I or a compound such as an oxide, nitride, carbide, or sulfide thereof, alone or in combination.
更にまた、磁性体層２ｃ、２ｄと樹脂層５の間、もしく
は磁性体Ｊｉ２ｃ、２ｄに形成された上記非磁性体層と
樹脂層５の間に紫外線硬化型樹脂層を形成してもよく、
これによって光磁気記録素子自体の信転性を更に向上さ
せることができる。Furthermore, an ultraviolet curable resin layer may be formed between the magnetic layers 2c, 2d and the resin layer 5, or between the non-magnetic layer formed on the magnetic layers Ji2c, 2d and the resin layer 5,
Thereby, the reliability of the magneto-optical recording element itself can be further improved.
かくして上記構成の光磁気記録素子によれば、接着用樹
脂層５に応力歪みが生じなく、また、磁性体層２ｃ、２
ｄと基板１ｃ、 ｌｄが化学的に侵されなくなり、その
結果、優れた光磁気記録特性が得られ、更に光磁気記録
初期特性が維持される。Thus, according to the magneto-optical recording element having the above structure, no stress strain occurs in the adhesive resin layer 5, and the magnetic layers 2c, 2
d and the substrates 1c and ld are no longer chemically attacked, and as a result, excellent magneto-optical recording characteristics are obtained, and the initial magneto-optical recording characteristics are maintained.
また本発明によれば、第３図に示すように２種類の基板
を備えた光磁気記録素子についても同様な効果を奏する
。Further, according to the present invention, a similar effect can be achieved in a magneto-optical recording element having two types of substrates as shown in FIG.
同図においては、基板６の上に磁性体層７が形成されて
おり、また、保護基板８を用意し、その基板８の上に接
着用樹脂を塗布し、そして、この基板８を接着用樹脂を
介して貼り合わせ、次いで室温下における自然硬化或い
は加熱により硬化させると接着用樹脂層９が形成され、
かくして第３図に示す通りの光磁気記録素子が得られる
。In the figure, a magnetic layer 7 is formed on a substrate 6, a protective substrate 8 is prepared, an adhesive resin is applied on the substrate 8, and this substrate 8 is used for adhesion. The adhesive resin layer 9 is formed by bonding via a resin and then curing naturally at room temperature or by heating.
In this way, a magneto-optical recording element as shown in FIG. 3 is obtained.
このような保護基板８には前記基板６と同様なプラスチ
ック板又はガラス板を用いることができる。As such a protective substrate 8, a plastic plate or a glass plate similar to the substrate 6 can be used.
次に本発明の実施例を述べる。 Next, examples of the present invention will be described.
交流三源マグネトロンスパッタリング装置を用いてポリ
カーボネート製ディスク基板に誘電体層（窒化シリコン
を主要成分とし、これにＹ原子、Ａ１原子及びＯ原子が
含まれた層であり、これは所謂、ＹＳｉＡ１ＯＮ層・・
・イツトリウムサイアロン層と呼ばれる層である）を７
２５人の厚みで形成し、この層の上にＧｄＤｙＦｅ垂直
磁化膜を３００人の厚みで形成し、そして、同装置内で
続けて酸化チタン層（チタン原子に対する酸素原子比率
が０．０５〜０．９０の範囲内に設定されている）を６
５０人の厚みで形成し、然る後、この酸化チタン層の上
に紫外線硬化型樹脂をスピンコードで塗布して樹脂層を
形成し、光磁気記録部材をつくった。A dielectric layer (a layer containing silicon nitride as a main component and containing Y atoms, A1 atoms, and O atoms; this is a so-called YSiA1ON layer) was formed on a polycarbonate disk substrate using an AC three-source magnetron sputtering device.・
・It is a layer called Yztrium Sialon layer) is 7
On top of this layer, a GdDyFe perpendicular magnetization film is formed to a thickness of 300 nm, and then in the same apparatus, a titanium oxide layer (the ratio of oxygen atoms to titanium atoms is 0.05 to 0) is formed. .90) to 6
After that, an ultraviolet curable resin was applied onto the titanium oxide layer using a spin cord to form a resin layer, thereby producing a magneto-optical recording member.
次いで、このような光磁気記録部材をそれぞれ２個用意
し、その一方の光磁気記録部材の紫外線硬化型樹脂層の
上に第１表に示すような接着用樹脂を塗布し、この接着
用樹脂を介して両部材を接着させた。Next, two such magneto-optical recording members are prepared, and an adhesive resin as shown in Table 1 is applied onto the ultraviolet curable resin layer of one of the magneto-optical recording members. Both members were bonded together via.
かくして得られる６種類の光磁気記録素子（隘１〜阻６
）について偏光顕微鏡を用いて基板面全体に亘る複屈折
の分布状態を調べたところ、第１表に示す通りの結果へ
が得られた。Six types of magneto-optical recording elements (numbers 1 to 6) were obtained in this way.
) was investigated for the distribution of birefringence over the entire substrate surface using a polarizing microscope, and the results shown in Table 1 were obtained.
結果へにおいて、Ｏ印は基板面全体に亘って均一な複屈
折が得られた場合であり、Ｘ印は基板面の一部に異常な
複屈折が認められた場合であり、Δ印は基板面の一部に
わずかに異常な複屈折が認められた場合を示す。In the results, the O mark indicates that uniform birefringence was obtained over the entire substrate surface, the X mark indicates that abnormal birefringence was observed in a part of the substrate surface, and the Δ mark indicates that uniform birefringence was obtained over the entire substrate surface. This shows a case where slightly abnormal birefringence is observed on a part of the surface.
また、各々の光磁気記録素子を貰温高湿下（７５℃、８
５χＲＨ）に５００時間放置し、磁性体層の腐食発生状
況を調べたところ、結果Ｂが得られた。In addition, we received each magneto-optical recording element under high temperature and high humidity conditions (75°C, 8°C).
5χRH) for 500 hours, and the occurrence of corrosion in the magnetic layer was examined, and result B was obtained.
結果Ｂにおいて、Ｏ印は腐食が発生しなかった場合であ
り、Ｘ印は腐食の発生が顕著である場合であり、Δ印は
わずかに腐蝕発生が認められた場合である。In result B, the mark O indicates that no corrosion occurred, the mark X indicates a case where significant corrosion occurred, and the mark Δ indicates a case where slight corrosion was observed.
更に、各々の光磁気記録素子について、基板の変質状況
、即ち、基板の溶解や分解に起因する変色や割れの発生
状況を調べたところ、結果Ｃが得られた。Further, for each magneto-optical recording element, the state of deterioration of the substrate, that is, the state of occurrence of discoloration and cracking due to dissolution or decomposition of the substrate, was investigated, and result C was obtained.
結果Ｃにおいて、Ｏ印は基板に何ら異常が認められなか
った場合であり、Ｘ印は変色や割れが認められた場合で
ある。In result C, the mark O indicates that no abnormality was observed in the substrate, and the mark X indicates that discoloration or cracking was observed.
第１表より明らかな通り、素子阻６は基板面全体に亘っ
て均一な複屈折が得られ、しかも、磁性体層に腐蝕が発
生せず、また、ポリカードネート製基板自体に同等異常
が生じなかった。As is clear from Table 1, the element barrier 6 provides uniform birefringence over the entire substrate surface, does not cause corrosion in the magnetic layer, and has no similar abnormalities in the polycarbonate substrate itself. It did not occur.
次に上記光磁気記録素子のなかで、
（ｉ） ・・・素子６
（ｉｉ） ・・・素子５
（ｉｉｉ ） ・・・素子３
（ｉｖ） ・・・素子１
を高温高湿下（７５℃、８５χＲＨ）に設置し、そのビ
ット・エラー・レートの経時変化を追ったところ、第５
図に示す通りの結果が得られた。Next, among the above-mentioned magneto-optical recording elements, (i)...Element 6 (ii)...Element 5 (iii)...Element 3 (iv)...Element 1 were subjected to high temperature and high humidity (75 ℃, 85χRH) and tracked the change in bit error rate over time.
The results shown in the figure were obtained.
同図中、横軸は放置時間であり、縦軸は放置開始時のピ
ント・エラー・レー） ＢＥＲ（０）に対する放置後の
ビット・エラー・レートＢＥＴ（Ｔ）の比率であり、ま
た、○印、・印、△印及びム印はそれぞれ上記（ｉ）、
（ｉｉ ）、（ｉｉｉ ）及び（ｉｖ）に対応するプロ
ットであり、そして、図中の特性曲線の表示はいずれも
（ｉ ） （ｉｉ ） （ｉｉｉ ） （ｉｖ
）に対応する。In the figure, the horizontal axis is the unused time, and the vertical axis is the ratio of the bit error rate BET (T) after unused to BER (0) (focus error rate at the start of unused), and ○ The marks, ・, △ and mu are the above (i), respectively.
The plots correspond to (ii), (iii) and (iv), and the characteristic curves in the figure are all (i) (ii) (iii) (iv).
).
第５図より明らかな通り、本発明の素子６は長期間に亘
って優れた光磁気記録特性が得られることが判る。As is clear from FIG. 5, it can be seen that the element 6 of the present invention provides excellent magneto-optical recording characteristics over a long period of time.
また、本発明者等は上記接着用樹脂に脱酢酸型シリコー
ン系樹脂を用いた場合、磁性体層に腐蝕が顕著に生じ、
そして、ピットエラーレートが経時的に劣化し、そのた
めに接着用樹脂として不適であることを確認した。In addition, the present inventors have found that when an acetic acid-removed silicone resin is used as the adhesive resin, significant corrosion occurs in the magnetic layer.
It was also confirmed that the pit error rate deteriorated over time, making it unsuitable as an adhesive resin.
更にまた本発明者等は上記実施例以外に第３図に示す光
磁気記録素子についても同様な結果が得られることを確
認した。Furthermore, the present inventors have confirmed that similar results can be obtained with the magneto-optical recording element shown in FIG. 3 in addition to the above-mentioned examples.
〔発明の効果〕
以上の通り、本発明の光磁気記録素子によれば、脱アル
コール型シリコーン系樹脂を接着用樹脂として用いてお
り、これによって応力腐蝕がなくなり、また、この樹脂
により磁性体層や基板が化学的に侵されず、その結果、
優れた光磁気記録特性が得られると共にその初期特性が
維持された高性能且つ長期信頼性の光磁気記録素子が提
供できた。[Effects of the Invention] As described above, according to the magneto-optical recording element of the present invention, a dealcoholized silicone resin is used as an adhesive resin, which eliminates stress corrosion. and the substrate are not chemically attacked, resulting in
It has been possible to provide a high-performance, long-term reliable magneto-optical recording element in which excellent magneto-optical recording characteristics are obtained and the initial characteristics are maintained.
第１図は貼り合わせ前の各々の光磁気記録部材の層構成
を示す断面図、第２図は本発明光磁気記録素子の層構成
を示す断面図、第３図は本発明光磁気記録素子の他の層
構成を示す断面図、第４図は従来の光磁気記録素子の層
構成を示す断面図、第５図はビット・エラー・レートの
経時変化を示す線図である。
ｌａ、ｌｂ、ｌｃ、ｌｄ、６ ・・・基板２ａ、２ｂ
、２ｃ、２ｄ、７ ・・・磁性体層４．５．９ ・
・・・・・・接着用樹脂層Ａ、Ｂ、Ｃ，Ｄ ・・・・
・・光磁気記録部材特許出願人（６６３）京セラ株式会
社
代表者安城欽寿FIG. 1 is a cross-sectional view showing the layer structure of each magneto-optical recording member before bonding, FIG. 2 is a cross-sectional view showing the layer structure of the magneto-optical recording element of the present invention, and FIG. 3 is the magneto-optical recording element of the present invention. FIG. 4 is a cross-sectional view showing the layer structure of a conventional magneto-optical recording element, and FIG. 5 is a diagram showing the change in bit error rate over time. la, lb, lc, ld, 6...substrates 2a, 2b
, 2c, 2d, 7...Magnetic layer 4.5.9 ・
...Adhesive resin layers A, B, C, D ...
...Magneto-optical recording member patent applicant (663) Kyocera Corporation representative Kinju Anjo
Claims (2)
、接着用樹脂層及び第２基板が順次形成された光磁気記
録素子において、前記接着用樹脂層が脱アルコール型シ
リコーン系樹脂から成り且つ弾性率が１．５×１０＾７
ｄｙｎ／ｃｍ＾２以下に設定されていることを特徴とす
る光磁気記録素子。(1) In a magneto-optical recording element in which at least a magnetic layer, an adhesive resin layer, and a second substrate are sequentially formed on a first plastic substrate, the adhesive resin layer is made of a dealcoholization type silicone resin and is elastic. The ratio is 1.5×10^7
1. A magneto-optical recording element characterized by being set to dyn/cm^2 or less.
成して成る第１光磁気記録部材、プラスチック製基板上
に少なくとも磁性体層を形成して成る第２光磁気記録部
材、並びに第１光磁気記録部材と第２光磁気記録部材を
貼り合わせるための接着用樹脂層から成る光磁気記録素
子において、前記接着用樹脂層が脱アルコール型シリコ
ーン系樹脂から成り且つ弾性率が１．５×１０＾７ｄｙ
ｎ／ｃｍ＾２以下に設定されていることを特徴とする光
磁気記録素子。(2) A first magneto-optical recording member comprising at least a magnetic layer formed on a plastic substrate, a second magneto-optical recording member comprising at least a magnetic layer formed on a plastic substrate, and a first magneto-optical recording member In a magneto-optical recording element comprising an adhesive resin layer for bonding a recording member and a second magneto-optical recording member, the adhesive resin layer is made of a dealcoholization type silicone resin and has an elastic modulus of 1.5×10^. 7 days
A magneto-optical recording element characterized in that the magnetic field is set to n/cm^2 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10369588A JP2613082B2 (en) | 1988-04-26 | 1988-04-26 | Magneto-optical recording element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10369588A JP2613082B2 (en) | 1988-04-26 | 1988-04-26 | Magneto-optical recording element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01276452A true JPH01276452A (en) | 1989-11-07 |
| JP2613082B2 JP2613082B2 (en) | 1997-05-21 |
Family
ID=14360914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10369588A Expired - Fee Related JP2613082B2 (en) | 1988-04-26 | 1988-04-26 | Magneto-optical recording element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2613082B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5981682A (en) * | 1996-06-25 | 1999-11-09 | Dow Corning Toray Silicone Co., Ltd. | Silicon bonding agent for optical memory element, optical memory element, and method for manufacturing optical memory element |
-
1988
- 1988-04-26 JP JP10369588A patent/JP2613082B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5981682A (en) * | 1996-06-25 | 1999-11-09 | Dow Corning Toray Silicone Co., Ltd. | Silicon bonding agent for optical memory element, optical memory element, and method for manufacturing optical memory element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2613082B2 (en) | 1997-05-21 |
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