JPH01232521A - Structure of surface lubricating film of magnetic recording medium - Google Patents
Structure of surface lubricating film of magnetic recording mediumInfo
- Publication number
- JPH01232521A JPH01232521A JP5704788A JP5704788A JPH01232521A JP H01232521 A JPH01232521 A JP H01232521A JP 5704788 A JP5704788 A JP 5704788A JP 5704788 A JP5704788 A JP 5704788A JP H01232521 A JPH01232521 A JP H01232521A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic
- carbonaceous
- recording medium
- intermediate 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.)
- Granted
Links
- 230000001050 lubricating effect Effects 0.000 title abstract description 11
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000004544 sputter deposition Methods 0.000 abstract description 3
- 238000001771 vacuum deposition Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 63
- 238000005461 lubrication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気記録媒体の磁性膜面を被覆保護するため
の固体潤滑膜構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid lubricant film structure for coating and protecting a magnetic film surface of a magnetic recording medium.
非磁性基体に金属系薄膜を磁性膜として形成した金属薄
膜型磁気記録媒体において、その記録メディアとしての
機能および耐用寿命を安定化するには、磁性膜面とこれ
に近接対向する記録・再生用磁気ヘッドとの接触を滑ら
かにし、かつ磁気ヘッドと磁性膜の摩耗・損傷を防止す
ることが必要なことは言うまでもない。従来より、その
膜面の保護および接触面間の潤滑性向上のために、磁性
膜表面に液体潤滑剤を塗布するか、または磁性膜内に固
体潤滑剤を練り込むことが行われてきた。In a metal thin film magnetic recording medium in which a metal thin film is formed as a magnetic film on a non-magnetic substrate, in order to stabilize the function and service life of the recording medium, it is necessary to Needless to say, it is necessary to make smooth contact with the magnetic head and to prevent wear and damage to the magnetic head and magnetic film. Conventionally, in order to protect the film surface and improve lubricity between contact surfaces, it has been practiced to apply a liquid lubricant to the surface of the magnetic film or to knead a solid lubricant into the magnetic film.
しかるに、液体潤滑剤を磁性膜面に塗布する潤滑方式で
は、潤滑剤表面張力による磁気ヘッドの吸着や、潤滑剤
のマイグレーションが生じ易く耐久性に乏しいという欠
点があり、他方固体潤滑剤を磁性膜に練り込む方式では
、潤滑剤の混入による磁性膜の性能低下（特に記録密度
の限界）等の問題がある。However, the lubrication method in which a liquid lubricant is applied to the magnetic film surface has the disadvantage that the magnetic head is easily attracted by the lubricant surface tension and the lubricant migrates easily, resulting in poor durability. In the method of mixing in the lubricant, there are problems such as deterioration of the performance of the magnetic film (particularly the limit of recording density) due to the mixing of lubricant.
本発明は上記に鑑み、潤滑特性および耐久性のすぐれた
固体潤滑膜構造を提供するものである。In view of the above, the present invention provides a solid lubricant film structure with excellent lubrication properties and durability.
〔問題点を解決するための手段および作用〕本発明の磁
気記録媒体の磁性膜を被覆保護する潤滑膜構造は、磁性
膜の表面に、炭素質膜を中間層として、末端にパーフル
オロアルケニルオキシベンゼン基を有する極性単分子型
フルオロカーボン膜（以下、「単分子型フルオロカーボ
ン膜」ともいう）が形成されていることを特徴としてい
る。[Means and effects for solving the problems] The lubricating film structure that coats and protects the magnetic film of the magnetic recording medium of the present invention has a carbonaceous film as an intermediate layer on the surface of the magnetic film, and a perfluoroalkenyloxy film at the end. It is characterized in that a polar monomolecular fluorocarbon film (hereinafter also referred to as a "monomolecular fluorocarbon film") having benzene groups is formed.
本発明の磁性膜表面に形成される固体潤滑膜の膜材であ
る単分子型フルオロカーボンは、ヘキサフルオロプロピ
レンから誘導された、下式二または
水基を導入して得られる重合体である。その好ま（融点
：約１４３°Ｃ）
等が挙げられる。The monomolecular fluorocarbon that is the film material for the solid lubricant film formed on the surface of the magnetic film of the present invention is a polymer derived from hexafluoropropylene and obtained by introducing di- or hydroxy groups of the following formula. Its preferability (melting point: about 143°C) is mentioned.
本発明において、磁性膜面に炭素質膜を形成し、その上
に上記単分子型フルオロカーボンからなる潤滑膜を成膜
することとしたのは、炭素質膜を中間層として磁性膜面
に対する上記潤滑膜の強固な接着関係を形成すると共に
、その成膜を均質なものとするためである。この炭素質
膜の形成は、真空蒸着法、イオンブレーティング法、ス
パッタリング法等により行えばよい。その膜厚は、中間
層としての上記効果を十分なものとするために、５０Å
以上であることが望ましい。しかし、その膜厚をあまり
厚くすると、磁気記録媒体の電気特性の低下、記録再生
出力の低下等を招くので、約３００人までとするのがよ
い。In the present invention, a carbonaceous film is formed on the magnetic film surface, and a lubricating film made of the monomolecular fluorocarbon is formed thereon.The carbonaceous film is used as an intermediate layer to lubricate the magnetic film surface. This is to form a strong adhesive relationship between the films and to make the film formation uniform. This carbonaceous film may be formed by a vacuum evaporation method, an ion blating method, a sputtering method, or the like. The film thickness is 50 Å in order to achieve the above-mentioned effect as an intermediate layer.
The above is desirable. However, if the film thickness is made too thick, it will lead to deterioration of the electrical characteristics of the magnetic recording medium, a decrease in the recording/reproduction output, etc., so it is preferable to limit the number of people to about 300 or less.
単分子型フルオロカーボン膜は、真空蒸着法により、あ
るいは適当な有機溶剤（アセトン、エタノール等）に熔
解して塗布する方法等により形成することができる。炭
素質膜を中間層として成膜される単分子型フルオロカー
ボン膜は、その親水基を介して炭素質膜面に強固に結合
し、その末端耐摩耗性および耐食性等を示す。そのため
の膜厚は、潤滑特性、耐久性等を確保するために、約１
５０Å以上であることが望ましい。しかし、あまり厚く
すると、磁気記録媒体の磁気特性等の低下をみるので、
約３００人までとするのが適当である。The monomolecular fluorocarbon film can be formed by vacuum evaporation, or by dissolving it in an appropriate organic solvent (acetone, ethanol, etc.) and applying it. A monomolecular fluorocarbon film formed using a carbonaceous film as an intermediate layer is firmly bonded to the carbonaceous film surface via its hydrophilic groups, and exhibits terminal wear resistance, corrosion resistance, etc. The film thickness for this purpose is approximately 1.
It is desirable that the thickness be 50 Å or more. However, if it is made too thick, the magnetic properties of the magnetic recording medium will deteriorate.
It is appropriate to limit the number of participants to approximately 300 people.
なお、上記単分子型フルオロカーボン膜は、２つの分子
配向、すなわち磁性膜面に垂直な分子配に高い潤滑特性
と摩耗特性とをもたせることができる。The monomolecular fluorocarbon film can have high lubricating properties and wear properties in two molecular orientations, that is, in the molecular orientation perpendicular to the magnetic film surface.
本発明の対象とする金属薄膜型磁気記録媒体は、磁気デ
ィスクをはじめ、各種磁気ドラム、磁気テープ、磁気シ
ート等が包含される。これらは、いずれもその磁性膜表
面に、炭素質膜および単分子フルオロカーボン膜をこの
順に積層形成する点を除いて、公知の一般的な工程およ
び条件に従って製作することができる。The metal thin film magnetic recording medium to which the present invention is applied includes magnetic disks, various magnetic drums, magnetic tapes, magnetic sheets, and the like. All of these can be manufactured according to known general processes and conditions, except that a carbonaceous film and a monomolecular fluorocarbon film are laminated in this order on the surface of the magnetic film.
ＣＩ）供試材の製造
アルミニウム合金基板に、Ｎ１−Ｐめっキ膜、Ｃｒ膜お
よびＣｏＮｉＣｒ系合金磁性膜がこの順に積層形成され
た面内記録用磁気ディスク（５１／２″型）を製作し、
その磁性膜面に、スパッタリング法により炭素質膜を形
成し、゛ついで単分子型フルオロカーボン膜を真空蒸着
法により成膜して供試磁気ディスクを得た。また、比較
例として、磁性膜面に炭素質膜のみ形成したもの、およ
び炭素質膜を省略して単分子型フルオロカーボン膜ので
ある。CI) Manufacture of test material A magnetic disk for in-plane recording (51/2'' type) was manufactured in which an N1-P plating film, a Cr film, and a CoNiCr alloy magnetic film were laminated in this order on an aluminum alloy substrate. death,
A carbonaceous film was formed on the magnetic film surface by a sputtering method, and then a monomolecular fluorocarbon film was formed by a vacuum evaporation method to obtain a test magnetic disk. Comparative examples include one in which only a carbonaceous film is formed on the magnetic film surface, and a monomolecular fluorocarbon film in which the carbonaceous film is omitted.
真空度： １０−Ｓ〜１０−’Ｔｏｒｒ基板温度ニア０
〜９０°Ｃ
蒸発源加熱温度：１００〜２００’Ｃ
（ＩＩ）摩耗試験
供試磁気ディスクに磁気ヘッド（フェライト系モノヘン
ド）を接触させ、１１００ｒｐで摺接回転させ、４８時
間経過後の静止摩擦係数（μＳ）を測定する。Vacuum degree: 10-S to 10-'Torr substrate temperature near 0
~90°C Evaporation source heating temperature: 100~200'C (II) Wear test A magnetic head (ferrite monohend) was brought into contact with the magnetic disk under test, and the magnetic head (ferrite monohend) was rotated at 1100 rpm, and the coefficient of static friction after 48 hours was measured. (μS).
膜面に対するヘッドの垂直荷重はＬｏｇである。The vertical load of the head with respect to the membrane surface is Log.
第１表に、供試磁気ディスクの膜構造およびＹ耗試験に
よるμＳ測定結果を示す。同表に示すように、単分子型
フルオロカーボン膜を有しない供試磁気ディスクＮα１
１は、静止摩擦係数（μＳ）が１．０をこえ、膜面には
多数の疵が発生しており、潤滑特性および耐久性に乏し
い。これに対し、炭素質膜を中間層として単分子型フル
オロカーボン膜が形成された供試磁気ディスクＮｏ、
ｌおよびＮα２は膜面に疵の発生はなく、静止７擦係数
（μＳ）は１．０より小さく、すぐれた潤滑特性を示し
ている。なお、炭素質膜省略して単分子型フルオロカー
ボン膜を形成したＮα１２では、膜厚が不均一で、磁性
膜面との密着性も乏しく、潤滑膜として必要な成膜をな
しえなかった。Table 1 shows the film structure of the magnetic disk under test and the μS measurement results from the Y wear test. As shown in the table, the test magnetic disk Nα1 without a monomolecular fluorocarbon film
No. 1 has a static friction coefficient (μS) of more than 1.0, has many flaws on the film surface, and has poor lubricating properties and durability. In contrast, test magnetic disk No. 1, in which a monomolecular fluorocarbon film was formed with a carbonaceous film as an intermediate layer,
1 and Nα2, there were no scratches on the film surface, and the static coefficient of friction (μS) was less than 1.0, indicating excellent lubrication properties. In Nα12, in which the carbonaceous film was omitted and a monomolecular fluorocarbon film was formed, the film thickness was non-uniform and the adhesion to the magnetic film surface was poor, making it impossible to form a film necessary as a lubricating film.
第 １ 表
〔発明の効果〕
本発明の磁気記録媒体の潤滑膜構造は、すぐれて安定し
た潤滑特性を存しているので、磁気記録媒体の記録再生
機能の向上・安定化、および耐用寿命の同上に大きく寄
与するものである。Table 1 [Effects of the Invention] Since the lubricating film structure of the magnetic recording medium of the present invention has excellent and stable lubricating properties, it can improve and stabilize the recording and reproducing function of the magnetic recording medium and extend its useful life. This greatly contributes to the above.
Claims (1)
を中間層として、末端にパーフルオロアルケニルオキシ
ベンゼン基を有する極性単分子型フルオロカーボン膜が
形成されていることを特徴とする磁気記録媒体の表面潤
滑膜構造。1. Magnetism characterized by forming a polar monomolecular fluorocarbon film having a perfluoroalkenyloxybenzene group at the end with a carbonaceous film as an intermediate layer on the surface of a magnetic film formed on a non-magnetic substrate. Surface lubricant film structure of recording media.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63057047A JP2747695B2 (en) | 1988-03-10 | 1988-03-10 | Surface lubrication film structure of metal thin film type magnetic recording media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63057047A JP2747695B2 (en) | 1988-03-10 | 1988-03-10 | Surface lubrication film structure of metal thin film type magnetic recording media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01232521A true JPH01232521A (en) | 1989-09-18 |
| JP2747695B2 JP2747695B2 (en) | 1998-05-06 |
Family
ID=13044536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63057047A Expired - Fee Related JP2747695B2 (en) | 1988-03-10 | 1988-03-10 | Surface lubrication film structure of metal thin film type magnetic recording media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2747695B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG141229A1 (en) * | 2003-06-25 | 2008-04-28 | Fuji Elec Device Tech Co Ltd | Magnetic recording medium and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6398830A (en) * | 1986-10-15 | 1988-04-30 | Fuji Photo Film Co Ltd | Magnetic recording medium |
-
1988
- 1988-03-10 JP JP63057047A patent/JP2747695B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6398830A (en) * | 1986-10-15 | 1988-04-30 | Fuji Photo Film Co Ltd | Magnetic recording medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG141229A1 (en) * | 2003-06-25 | 2008-04-28 | Fuji Elec Device Tech Co Ltd | Magnetic recording medium and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2747695B2 (en) | 1998-05-06 |
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