JPH0335419A - Magnetic recording body - Google Patents
Magnetic recording bodyInfo
- Publication number
- JPH0335419A JPH0335419A JP16981489A JP16981489A JPH0335419A JP H0335419 A JPH0335419 A JP H0335419A JP 16981489 A JP16981489 A JP 16981489A JP 16981489 A JP16981489 A JP 16981489A JP H0335419 A JPH0335419 A JP H0335419A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- protective layer
- carbon protective
- lubricating
- magnetic recording
- 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
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011241 protective layer Substances 0.000 claims abstract description 47
- 239000010410 layer Substances 0.000 claims abstract description 46
- 230000001050 lubricating effect Effects 0.000 claims abstract description 25
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims abstract description 16
- 239000010409 thin film Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 13
- 239000000956 alloy Substances 0.000 abstract description 13
- 125000000524 functional group Chemical group 0.000 abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000314 lubricant Substances 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 238000009832 plasma treatment Methods 0.000 abstract description 7
- 229920000642 polymer Polymers 0.000 abstract description 7
- 238000007385 chemical modification Methods 0.000 abstract 2
- 238000004381 surface treatment Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 239000010408 film Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 125000000717 hydrazino group Chemical group [H]N([*])N([H])[H] 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 150000001721 carbon Chemical class 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 229910001004 magnetic alloy Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 125000001841 imino group Chemical group [H]N=* 0.000 description 3
- -1 perfluoroether Chemical class 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910020707 Co—Pt Inorganic materials 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical compound FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Lubricants (AREA)
- 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、磁気記憶装置に用いられる磁気記録体に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording medium used in a magnetic storage device.
磁気記憶装置は、磁気記録体と記録再生磁気ヘッド（以
下ヘッドと呼ぶ）を主要構成部としている。その記録再
生方法は、操作開始前にはヘッドと磁気記録体面が接触
状態であるが、磁気記録体が所定の回転数で回転するこ
とにより、ヘッドと磁気記録体面の間に所定の空間を作
り、この状態で記録再生する方法が現在では主流となっ
ている（コンタクト・スタート・ストップ方式、以下Ｃ
ＳＳ方式と称す）、この方法では、操作終了時に磁気記
録体の回転が止まる際には、ヘッドと磁気記録体は、再
び接触状態になる。この方式では操作開始時、および終
了時にヘッドと磁気記録体面は接触摩擦状態となう、こ
の時のヘッドと磁気記録体面の摩擦力を低減させるため
に、磁気記録体の表面に保護層を形成させることが一般
的に行なわれている。保護層の役割は、ヘッドと磁気記
録体面の摩擦力を低減させるだけではなく、ヘッドが磁
気記録体面から浮上している際に、わずかなバランスの
変化によう、ヘッドが磁気記録体面に衝突した際にも、
磁性層に傷がつかないように保護する役目もある。さら
に、磁性層の材質によっては、空気中の湿度等による腐
食の心配があう、保護層はそれを防止する役割もある。A magnetic storage device has a magnetic recording body and a recording/reproducing magnetic head (hereinafter referred to as a head) as main components. In this recording/reproduction method, the head and the magnetic recording surface are in contact before the start of operation, but by rotating the magnetic recording material at a predetermined number of rotations, a predetermined space is created between the head and the magnetic recording surface. , the method of recording and reproducing in this state is now mainstream (contact start-stop method, hereinafter referred to as C
In this method, when the rotation of the magnetic recording body stops at the end of the operation, the head and the magnetic recording body are brought into contact again. In this method, the head and the magnetic recording surface come into contact with each other at the beginning and end of the operation. In order to reduce the frictional force between the head and the magnetic recording surface at this time, a protective layer is formed on the surface of the magnetic recording material. It is common practice to do so. The role of the protective layer is not only to reduce the frictional force between the head and the magnetic recording surface, but also to prevent the head from colliding with the magnetic recording surface due to slight changes in balance when the head is flying above the magnetic recording surface. At times,
It also serves to protect the magnetic layer from scratches. Furthermore, depending on the material of the magnetic layer, there is a risk of corrosion due to humidity in the air, and the protective layer also serves to prevent this.
磁気記録体にとって重要な構成部である保護層は、従来
から種々の材料で作られている０例えば、金属メツキ膜
（例えばＣｒ 、Ｒｈ 、Ｎ１−Ｐ等）を保護層として
被覆する方法があるが、いずれも上記の接触摩擦現象に
対して有力な手段とはならない。よシ信頼性の高い保護
層として、５ｉ０２層と潤滑層を形成させる方法や、カ
ーボン膜を形成させる方法も試みられている。このうち
カーボン保護層に潤滑層ｔｍ布形成する方法が、他の方
法に比べて優れた特性を示すが、この場合でもカーボン
保護層と潤滑層の密着性があまシ良好でなく、さらに性
能の向上をはかるため、カーボン保護層と潤滑層の密着
力の改良が示されている。改良方法としてはカーボン表
面に水酸基、カルボキシル基、アミノ基あるいはイミノ
基を形威し、これらと化学的に反応しうる官能基を末端
に持つ潤滑剤を化学修飾させる方法が提案されている（
特開昭６５−１３６３１６号公報、特開昭６５−１５７
３１２号公報参照）。この水酸基、カルボキシル基、ア
ミノ基あるいはイミノ基を形成する方法として過酸化水
素溶液で処理する方法や水蒸気、アンモニアでプラズマ
処理する方法が示されているが、前者は湿式処理のため
異物が付着しやすく、後者は大面積に均一に形成するこ
とが極めて困難である。このため、乾式処理で大面積に
均一に容易に処理ができ、カーボン保護層と潤滑層の密
着力の改良できる手法が望まれている。The protective layer, which is an important component of a magnetic recording medium, has traditionally been made of various materials.For example, there is a method of coating the magnetic recording medium with a metal plating film (such as Cr, Rh, N1-P, etc.) as a protective layer. However, none of these methods is effective against the above-mentioned contact friction phenomenon. As highly reliable protective layers, attempts have also been made to form a lubricating layer together with a 5i02 layer, or to form a carbon film. Among these methods, the method of forming a lubricating layer tm cloth on the carbon protective layer shows superior properties compared to other methods, but even in this case, the adhesion between the carbon protective layer and the lubricating layer is not very good, and the performance is further deteriorated. In order to improve this, improvements in the adhesion between the carbon protective layer and the lubricant layer have been proposed. As an improvement method, a method has been proposed in which hydroxyl, carboxyl, amino, or imino groups are formed on the carbon surface, and the lubricant is chemically modified to have a functional group at the end that can chemically react with these groups (
JP-A-65-136316, JP-A-65-157
(See Publication No. 312). Methods for forming hydroxyl, carboxyl, amino, or imino groups have been proposed such as treatment with a hydrogen peroxide solution and plasma treatment with water vapor or ammonia, but the former method is a wet treatment that causes foreign matter to adhere to it. The latter is extremely difficult to form uniformly over a large area. Therefore, there is a need for a method that can easily and uniformly treat a large area by dry treatment and improve the adhesion between the carbon protective layer and the lubricating layer.
上記従来の乾式処理技術は、水酸基、カルボキシル基、
アミノ基あるいはイミノ基を形成するものであるが、こ
のためには水蒸気あるいはアンモニアをプラズマ中で一
部分のみ分解させて、カーボン保護層上に付着させる必
要がある。しかし、一般にプラズマにはエネルギー分布
があり、各種の分解が生じ、目的以外の原子種、分子種
も多数生じ、目的の官能基を大面積に一定量安定に形成
することは容易ではない。The above-mentioned conventional dry processing technology has hydroxyl groups, carboxyl groups,
To form amino groups or imino groups, it is necessary to partially decompose water vapor or ammonia in plasma and deposit it on the carbon protective layer. However, plasma generally has an energy distribution, various decompositions occur, and many atomic and molecular species other than the intended ones are generated, making it difficult to stably form a desired functional group in a constant amount over a large area.
本発明の目的は、カーボン保護層上に、大面積であって
も量産性に優れ、かつ接触摩擦に対しても耐久性の大き
い潤滑層を有する磁気記録媒体を提供することにある。An object of the present invention is to provide a magnetic recording medium having a lubricating layer on a carbon protective layer, which is excellent in mass productivity even if it has a large area, and has high durability against contact friction.
上記目的は、磁気記録体を構成するカーボン保護層を表
面処理して官能基としてカルボニル基を形成し、このカ
ルボニル基に対して潤滑性をもつ高分子化合物を化学修
飾することにより、達成される。The above objective is achieved by surface-treating the carbon protective layer that constitutes the magnetic recording medium to form a carbonyl group as a functional group, and chemically modifying a polymer compound that has lubricating properties for this carbonyl group. .
磁気記録体を構成するカーボン保護層は、酸化性プラズ
マ処理、あるいは、不活性ないし酸化性プラズマ処理し
た後酸素雰囲気中（空気等酸素を含む雰囲気も含む）に
放置することにより、プラズマ処理によって活性化され
たカーボン表面に酸素が付着し、カルボニル基ンＣ＝Ｏ
ｔ−形成しうる。The carbon protective layer constituting the magnetic recording medium can be activated by plasma treatment by oxidizing plasma treatment, or by leaving it in an oxygen atmosphere (including atmospheres containing oxygen such as air) after treatment with inert or oxidizing plasma. Oxygen attaches to the surface of the carbonized carbon, and the carbonyl group C=O
t-can be formed.
このカーボン保護層表面に形成した官能基と化学的に反
応しりる官能基（例えばヒドラジノ基−ＮＨ−ＮＨ２、
ヒドラジノ基、：Ｎ−ＮＨ２％シリリ化学修飾させるこ
とによう、カーボン保護層上に強固な潤滑層を形成する
ことができる。Functional groups that chemically react with the functional groups formed on the surface of this carbon protective layer (e.g. hydrazino group -NH-NH2,
A strong lubricating layer can be formed on the carbon protective layer by chemically modifying the hydrazino group: N-NH2% silily.
以下、本発明の詳細な説明する。 The present invention will be explained in detail below.
第１図は本発明の磁気記録体の一実施例を示す拡大断面
図である。FIG. 1 is an enlarged sectional view showing an embodiment of the magnetic recording body of the present invention.
この第１図に示す実施例の磁気記録体は、合金円盤１と
、この合金円盤１の上に被覆された非磁性下地層２と、
この非磁性下地層２の研摩面上に被覆された磁性薄膜層
３と、この磁性薄膜層５上に被覆されたカーボン保護層
４と、このカーボン保護層４上に化学修飾された潤滑層
５から構成されている。The magnetic recording body of the embodiment shown in FIG. 1 includes an alloy disk 1, a nonmagnetic underlayer 2 coated on the alloy disk 1,
A magnetic thin film layer 3 coated on the polished surface of this non-magnetic underlayer 2, a carbon protective layer 4 coated on this magnetic thin film layer 5, and a chemically modified lubricating layer 5 on this carbon protective layer 4. It consists of
合金円盤１の材料は、通常、Ａｔ−Ｍｇ合金が用いられ
、十分小さなうねシを持った面に仕上げられていなけれ
ばならない、この合金円盤１の上にはヘッドとの接触時
に変形損傷を生じない強度をもつ非磁性下地層２はメツ
キ法によ、ｊＤＮｉ−Ｐ系膜が形成されることが多いが
一定の強度をもつ非磁性膜であれば金属酸化物、金属炭
化物、金属窒化物、金属燐化物などのいずれでもよい。The material of the alloy disk 1 is usually an At-Mg alloy, and the surface must be finished with sufficiently small ridges. The non-magnetic underlayer 2, which has a certain strength, is often formed by a plating method, but a non-magnetic film with a certain level of strength can be made of metal oxide, metal carbide, or metal nitride. or metal phosphide.
非磁性下地層２は、平均表面粗さが１〜１５ｎｍに加工
されたあと、磁性薄膜層３が形成される。After the nonmagnetic underlayer 2 is processed to have an average surface roughness of 1 to 15 nm, the magnetic thin film layer 3 is formed.
この磁性薄膜層３には、スパッタ法によるＧｏ−Ｎｉ系
膜やＣｏ−Ｐｔ系膜、あるいはメツキ法によるＧｏ−Ｎ
ｉ−Ｐ膜などが用いられる。This magnetic thin film layer 3 is made of a Go-Ni film or a Co-Pt film formed by sputtering, or a Go-N film formed by plating.
An i-P film or the like is used.
磁性薄膜層５は、その１１ではヘッドとの接触摩擦に対
する耐久性が十分でないため、磁性薄膜層５上にカーボ
ン保護層４が形成されている。このカーボン保護ＪｖＩ
４には、スパッタカーボン膜やＣＶＤ法によるカーボン
、水素化カーボン膜などが用いられる。筐た、カーボン
に若干性の元素が含まれていてもよい。Since the magnetic thin film layer 11 does not have sufficient durability against contact friction with the head, a carbon protective layer 4 is formed on the magnetic thin film layer 5. This carbon protection JvI
4, a sputtered carbon film, carbon produced by CVD method, hydrogenated carbon film, or the like is used. However, the carbon may contain some elements.
前記カーボン保護層４によう、ヘッドとの接触摩擦に対
する耐久性は大幅に向上するが、潤滑性が不十分である
。そこで、カーボン保護層４０表面の潤滑性を高めるた
めに、潤滑層５が形成されている。この潤滑層５は、ヘ
ッドとの摩擦係数が十分小さいことが必要で、またヘッ
ドとの接触によシ簡単に損耗しないように、単にカーボ
ン保護層４に物理的に結合しているだけでは不十分で、
カーボン保護層４と化学的に結合していることが重要で
ある。Although the carbon protective layer 4 greatly improves durability against contact friction with the head, its lubricity is insufficient. Therefore, in order to improve the lubricity of the surface of the carbon protective layer 40, the lubricating layer 5 is formed. This lubricating layer 5 needs to have a sufficiently small coefficient of friction with the head, and it is not enough to simply be physically bonded to the carbon protective layer 4 so that it will not be easily worn out by contact with the head. Enough is enough;
It is important that it is chemically bonded to the carbon protective layer 4.
カーボン保護層４の表面には、そのままでは潤滑剤と化
学的に結合しうる官能基は存在しない。On the surface of the carbon protective layer 4, there is no functional group that can chemically bond with the lubricant as it is.
そこで、カーボン保護層４を表面処理して、水酸基やア
ミノ基をプラズマ処理で形成する方法が提案されている
。しかしながらこの場合には１１１０１やＮＨ５ｔ−分
解させつつ一〇Ｈ，−Ｎｌｉなどの官能基を分解させず
にプラズマ処理する必要がある。Therefore, a method has been proposed in which the carbon protective layer 4 is surface-treated to form hydroxyl groups and amino groups by plasma treatment. However, in this case, it is necessary to perform the plasma treatment while decomposing 11101 and NH5t without decomposing functional groups such as 10H and -Nli.
一般にはプラズマにはエネルギー分布があう上記のよう
な処理を、大面積に均一に行うことは困難である。カル
ボニル基Ｃ＝Ｏをプラズマ処理で形成するためには、０
２分子をＯＷ、子に分解し、カーボン保護層４と反応さ
せればよく、プラズマにエネルギー分布があっても容易
にカーボン保護層４上に形成しうる。これに着目するこ
とにより１これと反応しうる官能基をもつ潤滑性高分子
化合物を化学的にカーボン保護層４上に結合させること
ができる。この場合のカルボニル基には、アルデヒド基
Ｃ二÷も含まれる。ここで用いることができる潤滑性高
分子化合物は、パーフルオロエーテルなどのふっ素泊、
シリコーンオイル、フロロシリコーンなどのオイル類を
主鎖とし、末端にヒドラジノ基、シリリジン基などのよ
うに、カーボン保護層表面のカルボニル基と化学的な結
合を形成しうる官能基をもち、潤滑性をもつものであれ
ば、どのようなものでもよい。Generally, it is difficult to uniformly perform the above-mentioned processing over a large area because plasma has energy distribution. In order to form a carbonyl group C=O by plasma treatment, 0
It is sufficient to decompose two molecules into OW and molecules and react with the carbon protective layer 4, and even if the plasma has an energy distribution, it can be easily formed on the carbon protective layer 4. By paying attention to this, it is possible to chemically bond a lubricating polymer compound having a functional group capable of reacting with the lubricating polymer onto the carbon protective layer 4. The carbonyl group in this case also includes an aldehyde group C2÷. Lubricating polymer compounds that can be used here include fluoride compounds such as perfluoroether,
The main chain is an oil such as silicone oil or fluorosilicone, and the terminal has a functional group such as a hydrazino group or a silyridine group that can form a chemical bond with the carbonyl group on the surface of the carbon protective layer, giving it lubricity. It can be anything as long as it has it.
例えば、アルキルヒドラジンＲＮＨＮＨ２（Ｒは’ｍｓ
状炭化炭化水素基、官能基のヒドラジノ基（−ＮＨＮＨ
２）がカーボン保護層表面に存在するカルボニル基と脱
水縮合反応により強固に化学結合しヒドラゾン誘導体を
形成する。For example, alkylhydrazine RNHNH2 (R is 'ms
hydrocarbon group, functional group hydrazino group (-NHNH
2) forms a strong chemical bond with the carbonyl group present on the surface of the carbon protective layer through a dehydration condensation reaction to form a hydrazone derivative.
次に、本発明を実施例にようさらに詳細に説明する。Next, the present invention will be explained in more detail with reference to Examples.
〈実施例１〉
磁気記録体の合金円盤１の材料としてＡｔ−Ｍｇ合金を
用い、加工によって十分小さなうねシ（真直度１４μｍ
以下）をもった面に仕上げられた上に非磁性合金層２と
して無電解メツキによ１）Ｎｓ−Ｐ層を５０μｍ形成さ
せ、このＮ１−Ｐｌｉを機械的研摩によう、表面粗さと
してＲｍａｘα０４μｍ以下、厚さ２０μａ＞４で鏡面
研摩仕上げした。この面上にスパッタ法により％ Ｇ
ｏ −Ｎ ｉ合金磁性層を厚さ５００人形成した。この
面上にスパッタ法によりカーボン保護層４を厚さ５００
ＡｉＣ形成させた。このようにして得られたディスク状
円盤を、酸素を雰囲気ガスとした高周波プラズマ中で５
分間処理した後、この面上にヒドラジノ基を末端に有ス
ルパーフルオロアルキルエーテルのフッ素油を塗布し弱
酸性８０℃の雰囲気で一時間焼威して、潤滑層５′ｔ−
形成し、磁気娼録体を作製した。<Example 1> An At-Mg alloy was used as the material for the alloy disk 1 of the magnetic recording medium, and a sufficiently small ridge (straightness of 14 μm) was formed by processing.
1) A Ns-P layer of 50 μm is formed as the non-magnetic alloy layer 2 by electroless plating on the finished surface with Thereafter, mirror polishing was performed to a thickness of 20 μa>4. %G on this surface by sputtering method
An o-Ni alloy magnetic layer was formed to a thickness of 500 mm. A carbon protective layer 4 is formed on this surface by sputtering to a thickness of 500 mm.
AiC was formed. The disk-shaped disk thus obtained was placed in a high-frequency plasma with oxygen as an atmospheric gas for 5 minutes.
After treatment for 1 minute, fluorine oil of sulperfluoroalkyl ether having a hydrazino group at the end was applied to this surface and burned in a weakly acidic atmosphere at 80°C for 1 hour to form a lubricating layer 5't-
A magnetic recording medium was produced.
〈実施例２〉
実施例１と同様に、合金円盤１の材料として、Ａｔ−Ｍ
ｇ合金を用い、非磁性合金層２としてＮ１−ＰＮを形成
した後、磁性薄膜層３としてＧｏ−Ｎ１合金層を厚さ５
００Ａで形成し、この面上にカーボン保護層４を厚さ５
００Ａに形成させた。<Example 2> As in Example 1, At-M was used as the material for the alloy disk 1.
After forming N1-PN as the non-magnetic alloy layer 2 using Go-N1 alloy, a Go-N1 alloy layer is formed to a thickness of 5 as the magnetic thin film layer 3.
00A and a carbon protective layer 4 with a thickness of 5 on this surface.
00A was formed.
このようにして得られたディスク状円盤を、酸素を雰囲
気ガスとした高周波プラズマ中で５分間処理した後、こ
の面上にシリリジン基を末端に有ｔるパーフルオロアル
キルエーテルのフッ素油を塗布し、白金触媒の存在下で
８０℃・５ｈ放置して潤滑層５を形成し、磁気記録体を
作製した。The disk-shaped disc thus obtained was treated for 5 minutes in a high-frequency plasma with oxygen as an atmosphere gas, and then a fluorine oil of perfluoroalkyl ether having a silyridine group at the end was applied onto the surface. The lubricant layer 5 was formed by leaving it at 80° C. for 5 hours in the presence of a platinum catalyst, thereby producing a magnetic recording medium.
く比較例１〉
実施例１と同様に、合金円盤１の材料として、Ａｔ−Ｍ
ｇ合金を用い、非磁性合金層２としてＮ１−ｐ層を形成
し、磁性薄膜層３としてＧｏ−Ｎｉ合金を厚さ５００人
で形成した後、この面上にカーボン保護層４を厚さ３０
０Ａに形成し、潤滑層５トシてパーフルオロアルキルエ
ーテルの潤滑油を塗布して磁気記録体を作製した。Comparative Example 1 As in Example 1, At-M was used as the material for the alloy disk 1.
After forming an N1-p layer as the non-magnetic alloy layer 2 using a Go alloy and forming a Go-Ni alloy as a magnetic thin film layer 3 to a thickness of 500 mm, a carbon protective layer 4 is formed on this surface to a thickness of 30 mm.
A magnetic recording medium was prepared by forming a magnetic recording medium of 0A and applying a lubricating oil of perfluoroalkyl ether to five lubricating layers.
く比較例２〉
実施例１と同様に、合金円盤１の材料として、Ａｔ−Ｍ
ｇ合金を用い、非磁性合金層２としてＮ１−Ｐ層を形威
し、磁性薄膜層３としてＧｏ−Ｎｉ合金を厚さ５００Ａ
に形成した後、この面上にカーボン保護層４を厚さ！１
００Ａに形成させた。このようにして得られたディスク
状円盤を、酸素と水蒸気を雰囲気ガスとした高周波プラ
ズマ中で二分間処理した後、シリリジン基（ｅｓｌ−Ｈ
）を末端に有するパーフルオロアルキルエーテルのフッ
素油を塗布し、８０℃の雰囲気で一時間焼威して潤滑層
５を形成し、磁気記録体を作製した。Comparative Example 2 As in Example 1, At-M was used as the material for the alloy disk 1.
A N1-P layer is formed as the non-magnetic alloy layer 2, and a Go-Ni alloy is formed with a thickness of 500A as the magnetic thin film layer 3.
After forming the carbon protective layer 4 on this surface, 1
00A was formed. The disk-shaped disc thus obtained was treated for two minutes in high-frequency plasma with oxygen and water vapor as atmospheric gas, and then silyridine groups (esl-H
) was coated with a perfluoroalkyl ether fluorine oil at the end, and burned in an atmosphere of 80° C. for one hour to form a lubricating layer 5, thereby producing a magnetic recording medium.
実施例１．２および比較例１．２に示した磁気記録体と
、Ｍｎ−Ｚｎフェライトヘッドを用いてヘッド浮上量α
１５μｍでＯ８８万式による記録再生試験を実施した。Using the magnetic recording bodies shown in Example 1.2 and Comparative Example 1.2 and the Mn-Zn ferrite head, the head flying height α
A recording and reproducing test was conducted using the O880,000 type at 15 μm.
比較例１の場合には、二号五千回の繰返し後に、目視観
察できるきすが発生した。比較例２の場合には、三万五
千回の繰返し後に目視観察できるきすが発生した。これ
に対し、実施例１，２の場合には、五万回の繰返し後に
もきすは皆無であった。In the case of Comparative Example 1, visually observable scratches were generated after No. 2 was repeated 5,000 times. In the case of Comparative Example 2, visually observable scratches were generated after 35,000 repetitions. On the other hand, in the case of Examples 1 and 2, there was no scum even after 50,000 repetitions.
潤滑剤をカーボン保護層表面のカルボニル基に結合させ
て潤滑層を形成したため、磁気記録体の潤滑性が向上し
、ヘッドとの接触で潤滑剤が機械的にこすうとられるこ
とが少なくなった。これよシ、より高信頼性の磁気記録
体を提供することができる。Since the lubricant was bonded to the carbonyl group on the surface of the carbon protective layer to form a lubricant layer, the lubricity of the magnetic recording medium was improved and the lubricant was less likely to be mechanically rubbed off by contact with the head. This makes it possible to provide a more reliable magnetic recording medium.
以上説明した本発明によれば、磁気記録体を構成するカ
ーボン保護層を表面処理し、官能基としてカルボニル基
を形成し、このカルボニル基に対して潤滑性をもつ高分
子化合物を化学修飾してかり、カーボン保護層上に、大
面積であっても量産性に優れ、かつ接触摩擦に対しても
耐久性の大きい潤滑層を形成しうる効果がある。According to the present invention as described above, the carbon protective layer constituting the magnetic recording medium is surface-treated to form a carbonyl group as a functional group, and a polymer compound having lubricating properties for this carbonyl group is chemically modified. Therefore, it is possible to form a lubricating layer on the carbon protective layer, which is excellent in mass production even if it has a large area, and has high durability against contact friction.
第１図は本発明の磁気記録体の一実施例を示す拡大断面
図である。
１・・・・・・合金円盤、２・・・・・・非磁性合金、
３・・・・・・磁性薄膜層、４・・・・・・カーボン保
護層、５・・・・・・潤滑層。FIG. 1 is an enlarged sectional view showing an embodiment of the magnetic recording body of the present invention. 1...Alloy disk, 2...Nonmagnetic alloy,
3... Magnetic thin film layer, 4... Carbon protective layer, 5... Lubricating layer.
Claims (1)
性薄膜上にカーボン保護層が被覆された磁気記録体にお
いて、 前記カーボン保護層を表面処理することにより、該カー
ボン保護層の表面にカルボニル基が形成され、前記カー
ボン保護層の上に、前記カルボニル基を介して潤滑層が
化学修飾されていることを特徴とする磁気記録体。[Scope of Claims] 1. In a magnetic recording body in which a magnetic thin film is coated on a non-magnetic disk-shaped substrate, and a carbon protective layer is coated on the magnetic thin film, the carbon protective layer is surface-treated. A magnetic recording body characterized in that a carbonyl group is formed on the surface of a carbon protective layer, and a lubricating layer is chemically modified on the carbon protective layer via the carbonyl group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16981489A JPH0335419A (en) | 1989-07-03 | 1989-07-03 | Magnetic recording body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16981489A JPH0335419A (en) | 1989-07-03 | 1989-07-03 | Magnetic recording body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0335419A true JPH0335419A (en) | 1991-02-15 |
Family
ID=15893397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16981489A Pending JPH0335419A (en) | 1989-07-03 | 1989-07-03 | Magnetic recording body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0335419A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040052A (en) * | 1997-04-11 | 2000-03-21 | Tdk Corporation | Magnetic recording medium |
-
1989
- 1989-07-03 JP JP16981489A patent/JPH0335419A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040052A (en) * | 1997-04-11 | 2000-03-21 | Tdk Corporation | Magnetic recording medium |
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