JPS6326824A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6326824A JPS6326824A JP17008786A JP17008786A JPS6326824A JP S6326824 A JPS6326824 A JP S6326824A JP 17008786 A JP17008786 A JP 17008786A JP 17008786 A JP17008786 A JP 17008786A JP S6326824 A JPS6326824 A JP S6326824A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic
- magnetic layer
- magnetic recording
- layer
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 34
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010419 fine particle Substances 0.000 claims abstract description 12
- 229920006254 polymer film Polymers 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 abstract description 22
- 239000002245 particle Substances 0.000 abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910020630 Co Ni Inorganic materials 0.000 abstract description 3
- 229910002440 Co–Ni Inorganic materials 0.000 abstract description 3
- 229920001225 polyester resin Polymers 0.000 abstract description 3
- 239000004645 polyester resin Substances 0.000 abstract description 3
- 238000007740 vapor deposition Methods 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 abstract 1
- 239000010408 film Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- 229910020707 Co—Pt Inorganic materials 0.000 description 1
- 229910020705 Co—Rh Inorganic materials 0.000 description 1
- 229910020517 Co—Ti Inorganic materials 0.000 description 1
- 229910020516 Co—V Inorganic materials 0.000 description 1
- 229910020515 Co—W Inorganic materials 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- FPVKHBSQESCIEP-JQCXWYLXSA-N pentostatin Chemical compound C1[C@H](O)[C@@H](CO)O[C@H]1N1C(N=CNC[C@H]2O)=C2N=C1 FPVKHBSQESCIEP-JQCXWYLXSA-N 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高密度磁気記録に適する強磁性金属薄膜を磁気
記録層とする磁気記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording medium whose magnetic recording layer is a ferromagnetic metal thin film suitable for high-density magnetic recording.
従来の技術
磁気記録の高密度化の進歩は著しく 、Ｃｏ−Ｎｉ−０
系の斜め蒸着膜を利用した蒸着テープや、Ｃｏ−０ｒ等
の垂直磁化膜を配した磁気記録媒体が注目されている。Conventional technology The progress in increasing the density of magnetic recording has been remarkable, and Co-Ni-0
2. Description of the Related Art Vapor-deposited tapes using obliquely-deposited films and magnetic recording media with perpendicularly magnetized films such as Co-0r are attracting attention.
第２図は従来の代表的な磁気記録媒体の−レリである。FIG. 2 shows a typical conventional magnetic recording medium.
第２図で、１は高分子フィルム、２は架橋高分子から成
るミクロゲル粒子を核とする粒子高さ１００人の粒子状
突起を１６個／μｍ有する下塗り層である。３は酸素雰
囲気中でＣｏ−Ｎｉ （Ｎｉ ２０ｗ ｔ％）を斜め蒸
着して得た強磁性金属薄膜で、膜厚は０．０６〜０．３
μｍの範囲が多く用いられるものである。４は潤滑層で
５はバックコート層である。かかる構成の媒体は特開昭
５９−９２４２７号公報に示されるように、走行性の改
良はもとより、スチル特性も良好であり、潤滑剤を含有
するバックコート層（特公昭６７−２９７６９号公報）
と組み合わせることで、更に改良を加えることができる
ことが知られている。In FIG. 2, 1 is a polymer film, and 2 is an undercoat layer having 16 particulate protrusions/μm with a particle height of 100 particles having a core of microgel particles made of crosslinked polymer. 3 is a ferromagnetic metal thin film obtained by obliquely depositing Co-Ni (Ni 20 wt%) in an oxygen atmosphere, and the film thickness is 0.06 to 0.3
The range of μm is often used. 4 is a lubricating layer and 5 is a back coat layer. As shown in JP-A No. 59-92427, a medium with such a structure not only improves running properties but also has good still characteristics, and has a back coat layer containing a lubricant (Japanese Patent Publication No. 67-29769).
It is known that further improvements can be made by combining.
発明が解決しようとする問題点
しかしながら上記した構成では、使用環境が広範囲にな
るにつれて、信号対雑音比（以下Ｓ／Ｎと記す）を維持
できる十分な耐久性を得ようとすると、４の潤滑層厚み
を厚くする必要があり、高湿環境でハリツキ現象が生じ
る不都合が生じたり、短波長化が更に進むとスペーシン
グ損失が無視できなくなるため改良が望まれていた。Problems to be Solved by the Invention However, with the above-mentioned configuration, as the usage environment becomes wider, in order to obtain sufficient durability to maintain the signal-to-noise ratio (hereinafter referred to as S/N), the lubrication of 4. Improvements have been desired since it is necessary to increase the layer thickness, which causes the inconvenience of a hardness phenomenon in a high-humidity environment, and as wavelengths become even shorter, spacing loss becomes impossible to ignore.
本発明は上記した事情に鑑みなされたもので。The present invention was made in view of the above circumstances.
広範囲の環境下での使用に十分耐え得る優れた磁気記録
媒体を提供するものである。The present invention provides an excellent magnetic recording medium that can withstand use in a wide range of environments.
問題点を解決するための手段
上記した問題点を解決するため、本発明の磁気記録媒体
は、高分子フィルム上に第１国性層を配設し、その上に
規則的に配列した酸化鉄微粒子塗布層を配設し、更に第
２磁性層を配設したものである。Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic recording medium of the present invention has a primary layer formed on a polymer film, on which iron oxide is regularly arranged. A fine particle coating layer is provided, and a second magnetic layer is further provided.
作 用
本発明の磁気記録媒体は上記した構成により、高分子フ
ィルム上に粒子状突起を直接配設したものに比較して、
微粒子の配列が規１１Ｊ的なため、短波長での磁壁構造
の乱れが少なく、変調ノイズは勿論のこと、摺動ノイズ
が低くできるので、Ｓハの低下が少なく、耐用回数が増
加することになる。Function: Due to the above-described structure, the magnetic recording medium of the present invention has the following advantages compared to a magnetic recording medium in which particulate protrusions are directly disposed on a polymer film.
Because the arrangement of the particles is regular 11J, there is less disturbance in the domain wall structure at short wavelengths, and not only modulation noise but also sliding noise can be reduced, resulting in less deterioration of S and increased service life. Become.
実施例
以下１図面を参照しながら本発明の実施例について説明
する。第１図は本発明の実施例の磁気記録媒体の拡大断
面図である。第１図で６は厚み１０μｍのポリエチレン
テレフタレートフィルムからなる高分子フィルムで、７
は直径１ｒｒＬの円筒キャンに沿って移動する核フィル
ム上に電子ビーム蒸着法で形成したＣｏ−Ｎｉ （Ｎｉ
２Ｏｗ を係）膜で、最小入射角４６度、フィルム移動
速度は１１０ｎ／ｍｉ ｎで、蒸着時には４×１Ｏ−５
Ｔｏｒｒの酸素雰囲気とし、膜厚はｏ、０６μｍ とし
た。Embodiments Hereinafter, embodiments of the present invention will be described with reference to one drawing. FIG. 1 is an enlarged sectional view of a magnetic recording medium according to an embodiment of the present invention. In Figure 1, 6 is a polymer film made of polyethylene terephthalate film with a thickness of 10 μm, and 7
Co-Ni (Ni
2Ow) film, the minimum incident angle was 46 degrees, the film movement speed was 110n/min, and the film was 4×1O-5 during vapor deposition.
The oxygen atmosphere was Torr, and the film thickness was 0.06 μm.
この第１磁性層７を交流消去した後、平均粒子径２００
人の酸１ヒ鉄微粒子８を、ポリエステル樹脂９を結合剤
として平均１４ケ／μｍ２ となるよう分散固定した。After this first magnetic layer 7 was erased by AC, the average particle diameter was 200.
Human acid monoarsenic fine particles 8 were dispersed and fixed using polyester resin 9 as a binder at an average particle size of 14 particles/μm 2 .
この時、微粒子８は磁壁からの漏れ磁束に拘束されて規
則的に配列する。At this time, the fine particles 8 are restrained by leakage magnetic flux from the domain wall and arranged regularly.
この酸化鉄微粒子８は、磁気記録には実質は寄与してい
ないが、規則的に配列させるために有効である。Although the iron oxide fine particles 8 do not substantially contribute to magnetic recording, they are effective in orderly arranging them.
原理的には１合金強磁性微粒子でもいいのであるが、粒
子自身で集まり易く、狙い通りに均一に、且つ規則的に
配列することが技術的に困難であり、上記の酸化鉄微粒
子が最も目的に合致する材料といえるものである。In principle, 1-alloy ferromagnetic fine particles could be used, but since the particles tend to aggregate on their own and it is technically difficult to arrange them uniformly and regularly as desired, the iron oxide fine particles mentioned above are the most suitable. It can be said that this is a material that meets the following criteria.
１０は第２磁性層で、第１磁性層７と同じ構成にした。10 is a second magnetic layer, which has the same structure as the first magnetic layer 7.
１１は、真空蒸着法で形成した約６０人のパー７０ロア
ラキン酸の蒸着膜からなる潤滑層である。Reference numeral 11 denotes a lubricating layer consisting of a vapor-deposited film of about 60 par-70 loarachidic acid formed by vacuum vapor deposition.
比較例は、ポリエチレンテレフタレートフィルム上に平
均１４ケ／μｍ 平均粒子径２００人の酸化鉄微粒子を
ポリエステル樹脂で分散固定した上に、厚み０．１２μ
ｍのＣｏ−Ｎｉ斜め蒸着膜を形成しく酸素分圧は、磁気
特性をあわせるように調整した。）その上に同一の潤滑
剤層を配したものを比較例Ａ、潤滑剤層を４倍厚にした
ものを比較例Ｂとした。これらを８咽幅の磁気テープに
して。In the comparative example, iron oxide fine particles with an average particle diameter of 200 particles of 14 pieces/μm on average were dispersed and fixed on a polyethylene terephthalate film with a polyester resin, and then a film with a thickness of 0.12 μm was prepared.
The oxygen partial pressure was adjusted to match the magnetic properties. ) Comparative Example A had the same lubricant layer thereon, and Comparative Example B had the lubricant layer four times thicker. Make these into magnetic tape 8 times wide.
０．２７μｍのギャップ長のセンダストスパッタヘッド
により、記録再生をくり返した。Recording and reproduction were repeated using a Sendust sputter head with a gap length of 0.27 μm.
ｏ’ｃ、ｓ’ｃａｏ％ＲＨ，２０°Ｃ１０％ＲＨ，４０
’Ｃ６％ＲＨ、４０°Ｃｓｏ％ＲＨの環境で、記録再生
をくり返した。本発明の実施列は３００回２問題なく使
用できたが、比較例Ａは、各環境で、ノイズが６Ｑ〜８
０回目の使用で増大しはじめ、比較例Ｂは初期のＳ／Ｎ
が比較例Ａ（実施例に比べＳ、’Ｎで２ｄＢ低い）より
１．ｓｄＢ低いが、Ｓ／Ｈの低下は１６０〜１８０回目
までみられないという性質を示すが高湿の２環境ではジ
ッターが発生し、画面が見にくい状態であった。o'c, s'cao%RH, 20°C10%RH, 40
Recording and reproduction were repeated in an environment of 'C6%RH and 40°Cso%RH. The implementation column of the present invention could be used 300 times without any problem, but Comparative Example A had noise of 6Q to 8 in each environment.
It started to increase after the 0th use, and the initial S/N of Comparative Example B
is 1. compared to Comparative Example A (2 dB lower in S and 'N than the Example). Although the sdB was low, the S/H drop was not observed until the 160th to 180th time, but jitter occurred in the two high-humidity environments, making the screen difficult to see.
上記した実施例では、高分子フィルムとしてポリエチレ
ンテレフタレートフィルムヲ用いたが、他にポリエチレ
ンナフタレート、ポリフェニレンサルファイド、ポリア
ミドイミド、ポリイミド等でもよく、下塗り層を配しで
あるものでもよい。In the above embodiments, a polyethylene terephthalate film was used as the polymer film, but other materials such as polyethylene naphthalate, polyphenylene sulfide, polyamideimide, polyimide, etc. may also be used, and an undercoat layer may also be provided.
第１磁性層、第２磁性層は、同一材料でもよいし、異な
る材料でもよい。選べる材料は他にＣｏ−Ｆｅ 、Ｃｏ
−Ｃｒ 、Ｃｏ −Ｔ ｉ 、Ｃｏ −Ｖ 、Ｃｏ−Ｗ
、Ｃｏ −Ｍｏ 、Ｃｏ −Ｎｂ 。The first magnetic layer and the second magnetic layer may be made of the same material or may be made of different materials. Other materials that can be selected include Co-Fe and Co.
-Cr, Co-Ti, Co-V, Co-W
, Co-Mo, Co-Nb.
Ｃｏ−Ｐｔ 、Ｃｏ−Ｒｈ、Ｃｏ−３ｍ、Ｃｏ−Ｐｒ
、等及びそれらの部分酸化膜１等が挙げられる。Co-Pt, Co-Rh, Co-3m, Co-Pr
, etc. and the partial oxide film 1 thereof.
酸化鉄微粒子の配列を規則的にするには、塗布前に、直
流消去するか、あらかじめ記録磁化しておいてもよい。In order to arrange the iron oxide fine particles regularly, direct current erasure may be performed or recording magnetization may be performed in advance before coating.
発明の効果
以、ヒのように本発明によれば、Ｓ／Ｎの良好な状態で
広い環境条件下でのくり返し記録再生に使用することが
できるといったすぐれた効果がある。Effects of the Invention According to the present invention, as shown in (a) above, the present invention has an excellent effect that it can be used repeatedly for recording and reproducing under wide environmental conditions with good S/N ratio.
第１図は本発明の実施例の磁気記録媒体の拡大断面図、
第２図は従来の磁気記録媒体の拡大断面図である。
６・・・・・・高分子フィルム、７・・・・・・第１磁
性層、８・・・・・・酸化鉄微粒子、１０・・・・・・
第２磁性層。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名７−
°゛オイη千生１
δ−−−峠化５九７牧女テ
１０− す２磁柁ｉ
第２図FIG. 1 is an enlarged cross-sectional view of a magnetic recording medium according to an embodiment of the present invention;
FIG. 2 is an enlarged sectional view of a conventional magnetic recording medium. 6... Polymer film, 7... First magnetic layer, 8... Iron oxide fine particles, 10...
Second magnetic layer. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
°゛oiηChisei 1 δ---Togeka 597 Makijote 10- Su2Magic柁i Figure 2
Claims (1)
的に配列した酸化鉄微粒子塗布層を配設し、更に第２磁
性層を配設したことを特徴とする磁気記録媒体。A magnetic recording medium comprising a first magnetic layer disposed on a polymer film, a coated layer of regularly arranged iron oxide fine particles disposed thereon, and further a second magnetic layer disposed thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17008786A JPS6326824A (en) | 1986-07-18 | 1986-07-18 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17008786A JPS6326824A (en) | 1986-07-18 | 1986-07-18 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6326824A true JPS6326824A (en) | 1988-02-04 |
Family
ID=15898402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17008786A Pending JPS6326824A (en) | 1986-07-18 | 1986-07-18 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6326824A (en) |
-
1986
- 1986-07-18 JP JP17008786A patent/JPS6326824A/en active Pending
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