JPS62252519A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS62252519A JPS62252519A JP9711886A JP9711886A JPS62252519A JP S62252519 A JPS62252519 A JP S62252519A JP 9711886 A JP9711886 A JP 9711886A JP 9711886 A JP9711886 A JP 9711886A JP S62252519 A JPS62252519 A JP S62252519A
- Authority
- JP
- Japan
- Prior art keywords
- contg
- fluorine
- magnetic recording
- recording medium
- thin film
- 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 24
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 16
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 15
- 239000010409 thin film Substances 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 12
- 239000011737 fluorine Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 abstract description 4
- 125000003118 aryl group Chemical group 0.000 abstract description 3
- 125000001153 fluoro group Chemical group F* 0.000 abstract description 3
- 125000004407 fluoroaryl group Chemical group 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 229920006267 polyester film Polymers 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000002345 surface coating layer Substances 0.000 description 4
- 229910002441 CoNi Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- MHNPWFZIRJMRKC-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical compound F[C]=C(F)F MHNPWFZIRJMRKC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- -1 fatty acid esters Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 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、磁気テープ、磁気ディスクなどの磁気記録媒
体に適したもので、とくに回転ヘッド型ビデオテープレ
コーダに最適の磁気記録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention is suitable for magnetic recording media such as magnetic tapes and magnetic disks, and particularly relates to a magnetic recording medium suitable for rotary head type video tape recorders.
従来の技術
鉄、コバルト、ニッケルまたはそれらを主成分とする合
金を真空蒸着、スパッタリング、イオンブレーティング
などの真空中製膜法によりポリエステルフィルム、ポリ
イミドフィルムなどの高分子フィルムや非磁性金属薄板
などから成る基板上に形成して成る強磁性金属薄膜型磁
気記録媒体は、従来の塗布型磁気記録媒体に比べて記録
密度を飛躍的に向上せしめることが可能であるが、この
高密度化のためには、磁気記録媒体の表面を極力平担化
して磁気ヘッド・磁気記録媒体間のスペーシングロスを
極力減少せしめることが必要である。Conventional technology Iron, cobalt, nickel, or alloys containing these as main components are made from polymer films such as polyester films, polyimide films, non-magnetic metal thin sheets, etc. using vacuum film forming methods such as vacuum evaporation, sputtering, and ion blating. A ferromagnetic metal thin film magnetic recording medium formed on a substrate made of ferromagnetic metal can dramatically improve recording density compared to conventional coated magnetic recording media. It is necessary to minimize the spacing loss between the magnetic head and the magnetic recording medium by making the surface of the magnetic recording medium as flat as possible.
しかし、あマシ表面を平担化しすぎるとヘッドタッチ、
走行性に支障をきたし、とくにビデオ信号の再生におけ
るスチルモードにおいてはその再生寿命が極端に短かく
なる場合があるため、通常磁気記録媒体の表面を微細に
粗面化すると同時に各種有機滑剤や樹脂などから成る表
面被覆層を設けることによりこれらの解決がなされてき
た。このような表面被覆材料として各種の脂肪酸、脂肪
酸エステルＩＩＷ肪酸アミド、シリコンオイル、フッ素
オイル等の滑剤ｆ、ポリアミド樹脂、エポキシ樹脂等の
樹脂類が単独あるいは種々複合化された形で使用されて
きた。However, if the amashi surface is made too flat, it will cause head touch.
This may impede running performance and extremely shorten the playback life, especially in still mode for video signal playback. Therefore, the surface of the magnetic recording medium is usually finely roughened and at the same time various organic lubricants and resins are added. These problems have been solved by providing a surface coating layer consisting of, for example. As such surface coating materials, various fatty acids, fatty acid esters IIW fatty acid amides, lubricants such as silicone oil and fluorine oil, and resins such as polyamide resins and epoxy resins have been used singly or in various composite forms. Ta.
発明が解決しようとする問題点
スチル再生寿命をみた場合、上記の各種表面被覆はいず
れも常温、常湿においては、通常３０分以上の寿命を有
するが、湿度が２０％ＲＨ以下、さらに１６％Ｒ１（以
下になると、寿命が３０分以下に低下したシ、低下しな
いまでも再生画像に横に走る白点が多く現れるようにな
ることが本発明者らの検討の結果明らかになった。Problems to be Solved by the Invention Looking at still playback life, all of the above-mentioned surface coatings usually have a lifespan of 30 minutes or more at normal temperature and normal humidity, but when the humidity is below 20% RH, and even 16% As a result of the studies conducted by the present inventors, it has become clear that when the lifespan becomes less than R1, the lifespan decreases to 30 minutes or less, and even if the lifespan does not decrease, many horizontal white spots appear in the reproduced image.
問題点を解決するだめの手段
本発明は、酸素を含む強磁性金属薄膜上に、下記一般式
（１）
゛ 一般式ＣＩ）：
ＣＦ２＝Ｃ（ＣＦ２）ＩＩＩ（ＣＨ２）ｎ−〔ただし、
一般式（１）において、
Ｘは、フッ素原子、アルキル基、アリール基または、フ
ロロアリール基を表わし、ｍは０〜１２の整数、ｎは○
〜２２の整数を表わす。〕で表わされる７０ロアルキレ
ン残基を有する含フッ素化合物を含む薄層を形成せしめ
ることにより、上記問題を解決せんとするものである。Means to Solve the Problems The present invention provides the following general formula (1) ゛ General formula CI): CF2=C(CF2)III(CH2)n- [However,
In the general formula (1), X represents a fluorine atom, an alkyl group, an aryl group, or a fluoroaryl group, m is an integer of 0 to 12, and n is
Represents an integer between ~22. ] The above-mentioned problem is attempted to be solved by forming a thin layer containing a fluorine-containing compound having a 70-roalkylene residue represented by the following formula.
作用
酸素を含有せしめることによって表面硬度と耐食性１表
面被覆材の接着性を改善した強磁性金属薄膜上に、上記
含フッ素化合物を含む薄層を形成せしめることにより、
上記含フッ素化合物の低湿度下における強力な磁性金属
表面保護作用ならびに滑性作用でもって、強磁性金属の
磁気ヘッドへの凝着の発生しやすい低湿度環境下におい
て安定なスチル再生耐久性を保持せしめんとするもので
ある。By forming a thin layer containing the above-mentioned fluorine-containing compound on a ferromagnetic metal thin film whose surface hardness and corrosion resistance have been improved by incorporating active oxygen,
The fluorine-containing compound mentioned above has a strong protective effect on the surface of magnetic metal and a lubricating effect under low humidity, and maintains stable still playback durability in low humidity environments where ferromagnetic metal tends to adhere to magnetic heads. This is something that we are trying to encourage.
実施例
以下、本発明の実施例について図面を参照にしながら説
明する。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.
図は本発明の実施例における磁気記録媒体の基本構成を
示すものである。図において、１は基板、２は強磁性金
属薄膜、３は表面被覆層である。表面被覆層３は、前記
含フッ素化合物を含む薄層で構成される。The figure shows the basic configuration of a magnetic recording medium in an embodiment of the present invention. In the figure, 1 is a substrate, 2 is a ferromagnetic metal thin film, and 3 is a surface coating layer. The surface coating layer 3 is composed of a thin layer containing the fluorine-containing compound.
本発明に使用する前記含フッ素化合物としては、たとえ
ば、
（１） カルボン酸類
ＣＦ２＝ ｃｙｃａ２ａＨ２ｃｏｏｎ
ＣＦ２＝ ０Ｆ（ＯＦ２）、、（ＣＨ２）、２ＣＯＯＨ
（２） アルコール類
ＣＨ３
ＣＦ ＝ＣＦ（ＯＦ２）５（Ｃ）Ｉ２）、２０ＨＨ
（３） リン酸類
（４） アミン、アミド類
ＣＦ２ ＝ ＣＦＣＨＣＨＣ０ＮＢ
ＯＦ ＝ ｃｙｃＨＣＨＣ０ＮＨＣＢ（句 エステル
類
ａｙ ＝ＣＦＣＨ２ｃＨ２００００，２Ｈ２５ＣＦ２
＝ＣＦ（ＣＦ２）５（ＣＨ２）１ｏＯＣＯＣ１８Ｈ３７
’ ＣＨ０００Ｃ）１２０Ｆ ＝ ＣＦ２１′
ＯＨ００００Ｈ２ＣＦ ＝ ＣＦ２
０Ｈ２０ＣＯＣＨ２ＣＦ ： ａｙ２
（６） エーテル類
０Ｆ２＝ ＣＦＣＨ２ＣＨ２０ＣＨ２Ｃ１２Ｃ２Ｆ ＝
ａｙ２０Ｆ２＝ ＣＦ（ＯＦ２）５（ＣＨ２）１ｏＯ
ＣＨ２（ＣｎＨ２）、６０Ｈ。Examples of the fluorine-containing compounds used in the present invention include: (1) Carboxylic acids CF2= cyca2aH2coon CF2= 0F(OF2), (CH2), 2COOH
(2) Alcohols CH3 CF = CF(OF2)5(C)I2), 20HH (3) Phosphoric acids (4) Amines, amides CF2 = CFCHCHC0NB OF = cycHCHC0NHCB (phrase Esters ay = CFCH2cH20000, 2H25CF2
=CF(CF2)5(CH2)1oOCOC18H37
' CH000C)120F = CF21' OH0000H2CF = CF2 0H20COCH2CF : ay2 (6) Ethers 0F2 = CFCH2CH20CH2C12C2F =
ay20F2= CF(OF2)5(CH2)1oO
CH2(CnH2), 60H.
（７） チオエーテル類
ＣＦ２＝ＣＦ（ＣＦ２）５（ＣＨ２）、。５（ＣＨ２）
１ｏ（ＣＦ２）５０Ｆ＝ＣＦ□【
（８） メルカプタン類
ＣＦ２＝ＣＦ（ＣＦ２）５（ＣＨ２）、ｏＳＨＯＦ２＝
ＣＣＨ２０Ｈ２ＳＲ
ＣＨ３
ＣＦ２＝ＣＦＣＨ２ＣＨ２０ＣＯＣＨ２ＣＨＣＯＯＣＨ
２ＣＨ２ＳＨ等がある。本発明に用いる前記含フッ素化
合物中には少なくとも１個以上の一般式：
％式％）
〔ただし、Ｘは、フッ素原子、アルキル基、アリール基
またはフロロアリール基を表わし、ｍは０〜１２の整数
、ｎは０〜２２の整数を表わす。〕で表わされるフロロ
アルキレン残基を有しておシ、これらの残基の分子量の
全分子量に占める割合が６％以上であるものが適当であ
る。この割合が６チ以下であると本発明の効果が得られ
難くなる。(7) Thioethers CF2=CF(CF2)5(CH2). 5 (CH2)
1o(CF2)50F=CF□ [(8) Mercaptans CF2=CF(CF2)5(CH2), oSHOF2=
CCH20H2SR CH3 CF2=CFCH2CH20COCH2CHCOOCH
There are 2CH2SH etc. The fluorine-containing compound used in the present invention has at least one general formula: % formula %) [where X represents a fluorine atom, an alkyl group, an aryl group, or a fluoroaryl group, and m represents an An integer, n represents an integer from 0 to 22. ], and the proportion of the molecular weight of these residues in the total molecular weight is 6% or more. If this ratio is 6 or less, it becomes difficult to obtain the effects of the present invention.
上記例の一部にみられるごとく、含フッ素化合物中に、
長鎖パーフロロアルキル基や脂肪族アルキル基を含ませ
ることによって、これ自体の潤滑性を一段と向上させる
ことも可能である。As seen in some of the above examples, in fluorine-containing compounds,
By including a long-chain perfluoroalkyl group or an aliphatic alkyl group, the lubricity itself can be further improved.
強磁性金属薄膜上には、前記含フッ素化合物を表面１ゴ
当り０．１〜５００ｑ、さらに好ましくは０．５〜２０
０１１１ｐの割合でそれ単独、あるいは、他の滑剤、防
錆剤、樹脂等との複合体として薄層状に存在せしめるの
が良い。また、それを存在せしめる方法としては、強磁
性金属薄膜上に直接塗布、あるいは蒸着する方法以外に
、磁気記録媒体の裏面に塗布あるいは蒸着せしめておき
磁気記録媒体の積層（捲回）時に強磁性金属薄膜表面に
転写せしめる方法も可能である。On the ferromagnetic metal thin film, the fluorine-containing compound is applied in an amount of 0.1 to 500 q, more preferably 0.5 to 20 q per surface.
It is preferable to make it exist in a thin layer at a ratio of 0111p either alone or as a composite with other lubricants, rust preventives, resins, etc. In addition to coating or vapor-depositing it directly on the ferromagnetic metal thin film, there are other methods for making it exist, such as coating or vapor-depositing it on the back side of the magnetic recording medium and then applying it to the back surface of the magnetic recording medium so that it becomes ferromagnetic when stacking (winding) the magnetic recording medium. A method of transferring it onto the surface of a metal thin film is also possible.
強磁性金属薄膜としては、例えば斜め蒸着あるいは垂直
蒸着法にて形成されるＧｏ、Ｎｉ、Ｆｅ等を主体とする
金属薄膜、それらの合金を主体とする金属薄膜（例えば
、ＣｏＮｉ 、 ＧｏＯｒ等）であって成膜時の雰囲気
を酸素ガスが支配的となる雰囲気としたときに得られる
酸素を含むものが適当である。酸素の含有量としては、
強磁性金属に対する原子数比で少なくとも３％以上、好
ましくは６％以上が適当である。３％以下であると、本
発明の効果が得られ難くなる。The ferromagnetic metal thin film may be, for example, a metal thin film mainly made of Go, Ni, Fe, etc. formed by oblique evaporation or vertical evaporation, or a metal thin film mainly made of alloys thereof (e.g. CoNi, GoOr, etc.). A suitable material is one containing oxygen, which can be obtained when the atmosphere during film formation is dominated by oxygen gas. As for the oxygen content,
The appropriate atomic ratio to the ferromagnetic metal is at least 3% or more, preferably 6% or more. If it is 3% or less, it becomes difficult to obtain the effects of the present invention.
強磁性金属薄膜を形成すべき基板としては、巨視的には
表面平滑度良好であり、かつ、微細な突起を有するもの
が適当で、たとえば、表面に、高さ６０〜６００人で１
−当り平均ｌＸ１０’〜１ｏ８個の波状あるいは山状突
起を有するポリエステルフィルムは、とくに好ましいも
のである。As a substrate on which a ferromagnetic metal thin film is to be formed, it is appropriate to use one that has good macroscopic surface smoothness and has minute protrusions.
Particularly preferred are polyester films having an average of 1.times.10' to 1.times.8 corrugations or ridges per surface.
次に具体的な実施例をあげて説明する。Next, specific examples will be given and explained.
重合触媒残渣に起因する微粒子をほとんど含まないポリ
エステルフィルムの表面に延伸製膜途上で増粘剤を含む
変性シリコーンエマルジョン液を塗布硬化させることに
より得られた波状突起（高さ１００人密度１×１０ 個
／−）を形成せしめたものの上に連続真空斜め蒸着法に
よりＣｏＮｉ強磁性金属薄膜（Ｎｉ＝２０％、膜厚１ｏ
Ｏｏ人）を微量の酸素の存在下で形成せしめた。皮膜中
の酸素含量は原子数比で６％であった。この試料ｉＡと
する。Wavy protrusions (height: 100, human density: 1 x 10 CoNi ferromagnetic metal thin film (Ni=20%, film thickness 10
(Oo) was formed in the presence of trace amounts of oxygen. The oxygen content in the film was 6% in terms of atomic ratio. This sample is called iA.
ポリエステルフィルム内に添加されたシリカ微粒子によ
る勾配のゆるやかな粒状突起（平均高さ７０人平均直径
１μｍ）が表面１００μＲ当り数個存在し、しかも重合
触媒残渣に起因する微粒子による比較的大きな突起を極
力低減せしめたポリエステルフィルムの表面に直径１５
０へのシリカコロイド粒子を核とし紫外線硬化エポキシ
樹脂を結合剤とする急峻な山伏突起をｌＸ１０’個−形
成せしめた基板上に上記と同様の条件でＣｏＮｉ膜（Ｎ
ｉ＝２０％、膜厚１０ｏｏ人、酸素含量７％）を形成せ
しめたものをＢとする。また、比較例としてＢにおいて
蒸着時に酸素の導入を行わなかったもの（Ｂにおいて酸
素含量のみ２％以下としたもの）をＣとする。これらの
蒸着膜上にあらかじめ用意した各種の含フッ素化合物の
溶液を塗布し薄層を形成させたのち所定幅に切断して磁
気テープを作り、これらを２０℃、１５％ＲＨ中で試作
ビデオデツキに掛けてスチル再生特性を測定し、再生画
像に横に走る白点が現われ始める時間（白点発生時間）
と再生画像が完全に乱れ始める時間（寿命時間）とを求
めた。それらの結果を次表にまとめて記す。なお、比較
例として、飽和型パーフロロアルキル基含有含フッ素化
合物、・・・・・・（１４）、高級脂肪酸の誘導体、・
・・・・・（１５）、磁性膜の酸素含量の低いもの・・
・・・・（′７）等を加えている。There are several granular protrusions with a gentle slope (average height: 70 people, average diameter: 1 μm) created by fine silica particles added to the polyester film per 100 μR surface, and relatively large protrusions caused by fine particles caused by polymerization catalyst residues are avoided as much as possible. Diameter 15 on the surface of the reduced polyester film
A CoNi film (N
B is the film in which a film with a film thickness of 10 mm and an oxygen content of 7% is formed. Furthermore, as a comparative example, C is a sample B in which no oxygen was introduced during vapor deposition (B in which only the oxygen content was 2% or less). A solution of various fluorine-containing compounds prepared in advance was coated onto these vapor-deposited films to form a thin layer, and then cut into a predetermined width to make a magnetic tape, which was then put into a prototype video deck at 20°C and 15% RH. Measure the still playback characteristics by multiplying by
and the time (lifetime) at which the reproduced image begins to become completely distorted. The results are summarized in the table below. In addition, as comparative examples, saturated perfluoroalkyl group-containing fluorine-containing compounds, ... (14), derivatives of higher fatty acids, ...
...(15) Magnetic film with low oxygen content...
...('7) etc. are added.
（以 下金 白）
発明の効果
表から明らかなように本発明の磁気記録媒体は、低湿度
下におけるスチル再生時に良好な画質が得られ、しかも
その寿命も長く安定しているため実用的価値の非常に高
いものである。(hereinafter referred to as Kinpaku) As is clear from the table of effects of the invention, the magnetic recording medium of the present invention can obtain good image quality during still playback under low humidity conditions, and has a long and stable lifespan, so it has great practical value. is very high.
図面は本発明の磁気記録媒体の一実施例の断面図である
。
１・・・・・・基板、２・・・・・・強磁性金属薄膜、
３・・・・・・表面被覆層。The drawing is a sectional view of one embodiment of the magnetic recording medium of the present invention. 1...Substrate, 2...Ferromagnetic metal thin film,
3...Surface coating layer.
Claims (1)
表わされるフロロアルキレン残基を有する含フッ素化合
物を含む薄層を形成せしめたことを特徴とする磁気記録
媒体。 一般式（ I ） ▲数式、化学式、表等があります▼ 〔ただし、一般式（ I ）において、 ｘは、フッ素原子、アルキル基、アリール基または、フ
ロロアリール基を表わし、 ｍは０〜１２の整数、 ｎは０〜２２の整数を表わす。〕[Scope of Claims] A magnetic recording medium characterized in that a thin layer containing a fluorine-containing compound having a fluoroalkylene residue represented by the following general formula (I) is formed on a ferromagnetic metal thin film containing oxygen. . General formula (I) ▲ Numerical formulas, chemical formulas, tables, etc. Integer, n represents an integer from 0 to 22. ]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9711886A JPS62252519A (en) | 1986-04-25 | 1986-04-25 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9711886A JPS62252519A (en) | 1986-04-25 | 1986-04-25 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62252519A true JPS62252519A (en) | 1987-11-04 |
Family
ID=14183654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9711886A Pending JPS62252519A (en) | 1986-04-25 | 1986-04-25 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62252519A (en) |
-
1986
- 1986-04-25 JP JP9711886A patent/JPS62252519A/en active Pending
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