JPH0388123A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPH0388123A JPH0388123A JP22573289A JP22573289A JPH0388123A JP H0388123 A JPH0388123 A JP H0388123A JP 22573289 A JP22573289 A JP 22573289A JP 22573289 A JP22573289 A JP 22573289A JP H0388123 A JPH0388123 A JP H0388123A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- protective layer
- carbon protective
- magnetic
- liquid lubricant
- 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 31
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000010410 layer Substances 0.000 claims abstract description 30
- 239000011241 protective layer Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 239000010687 lubricating oil Substances 0.000 claims abstract description 17
- 230000001050 lubricating effect Effects 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000010409 thin film Substances 0.000 claims abstract description 7
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 5
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、固定磁気ディスク装置に搭載される磁気記
録媒体の潤滑特性を改善する製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a manufacturing method for improving the lubrication characteristics of a magnetic recording medium mounted in a fixed magnetic disk device.
近年、固定磁気ディスク装置に搭載される磁気記録媒体
（以下、単に媒体とも称する〉は装置の大容量化が進む
につれて、従来の非磁性基板上に鉄酸化物を樹脂バイン
ダ中に分散させて塗布した磁性層を備えた塗布型媒体か
ら、高密度記録に対応し得る薄膜媒体へと移行してきた
。In recent years, as the capacity of magnetic recording media (hereinafter simply referred to as media) installed in fixed magnetic disk devices has increased, iron oxide is dispersed and coated in a resin binder on a conventional non-magnetic substrate. There has been a shift from coated media with magnetic layers to thin-film media that can handle high-density recording.
薄膜媒体は、−膜内に、非磁性基板１例えば表面にＮ１
−Ｐ合金めっき層の形成されたＡ１合金基板上に、Ｃｒ
からなる非磁性金属下地層、 Ｃｏ合金からなる強磁性
合金薄膜磁性層、炭素保護層をスパッタ法またはめっき
法で形成し、さらにその上に液体潤滑剤を塗布した潤滑
層を形成する方法で製造される。強磁性金属薄膜磁性層
を記録層とすることにより、高密度記録が実現できる。The thin film medium includes - within the film, a non-magnetic substrate 1, for example N1 on the surface;
-Cr on the A1 alloy substrate on which the P alloy plating layer is formed
A non-magnetic metal base layer consisting of a non-magnetic metal base layer, a ferromagnetic alloy thin film magnetic layer consisting of a Co alloy, and a carbon protective layer are formed by sputtering or plating, and then a lubricating layer is formed by applying a liquid lubricant on top of this. be done. By using a ferromagnetic metal thin film magnetic layer as a recording layer, high-density recording can be realized.
非磁性金属下地層は磁性層の磁気特性を向上させるため
に設け、炭素保護層は磁性層を機械的、化学的に保護す
るために設けるものである。また、固定磁気ディスク装
置はＣ３Ｓ方式を採るために、媒体表面は磁気ヘッドと
の接触摺動による磨耗に耐え、かつ、摩擦係数は低いレ
ベルにあることが要求されるが、これに対応できる潤滑
特性を得るために、媒体最表面に潤滑層が形成されてい
る。The nonmagnetic metal underlayer is provided to improve the magnetic properties of the magnetic layer, and the carbon protective layer is provided to mechanically and chemically protect the magnetic layer. In addition, since fixed magnetic disk drives use the C3S method, the media surface must be able to withstand wear due to sliding contact with the magnetic head and have a low coefficient of friction. In order to obtain these characteristics, a lubricating layer is formed on the outermost surface of the medium.
ところが、炭素保護層上に塗布された液体潤滑剤は、炭
素が不活性であるために保護層との密着力が不足し、ス
ピンオフ（媒体の回転による液体潤滑剤の離脱）、磁気
ヘッドへの液体潤滑剤の転移付着などが起こり、媒体表
面の潤滑特性が劣化し耐久性が充分でないという問題が
あった。However, the liquid lubricant applied on the carbon protective layer lacks adhesion to the protective layer because carbon is inert, resulting in spin-off (separation of the liquid lubricant due to rotation of the medium) and damage to the magnetic head. There was a problem that transfer and adhesion of the liquid lubricant occurred, and the lubricating properties of the medium surface deteriorated, resulting in insufficient durability.
この発明が解決しようとする課題は、上述の問題点を解
消して、潤滑特性の改善された媒体の製造方法を提供す
ることにある。The problem to be solved by this invention is to solve the above-mentioned problems and provide a method for producing a medium with improved lubricating properties.
上記の課題は、この発明によれば、非磁性基板上に強磁
性金属薄膜磁性層とその上に積層された炭素保護層とを
備え、さらにこの炭素保護層上にフロロカーボン系の液
体潤滑剤を塗布した潤滑層を備えてなる磁気記録媒体の
製造方法において、液体潤滑剤を塗布する前の炭素保護
層表面を高湿雰囲気にさらした後に液体潤滑剤を塗布し
て潤滑層を形成する製造方法とすることによって解決さ
れる。According to the present invention, the above problem can be solved by providing a ferromagnetic metal thin film magnetic layer on a non-magnetic substrate and a carbon protective layer laminated thereon, and further applying a fluorocarbon liquid lubricant on the carbon protective layer. A method for producing a magnetic recording medium comprising a coated lubricant layer, in which the surface of the carbon protective layer is exposed to a high humidity atmosphere before the liquid lubricant is coated, and then the liquid lubricant is coated to form the lubricant layer. This is solved by
高湿雰囲気にさらされた炭素保護層表面は雰囲気中の水
分を取り込みやすくなり、表面にハイドロカーボン層が
形成される。このハイドロカーボン層が適当な条件下で
形成されると、その上に塗布されるフロロカーボン系の
液体潤滑剤と強く密着し安定した潤滑層が形成され、表
面の潤滑特性が優れ耐久性が大幅に向上した媒体が得ら
れることになる。雰囲気の条件としては温度３０℃以上
６０℃以下、相対湿度７０％以上が好適である。雰囲気
中にさらす時間は少なくとも１時間以上になると有効で
ある。The surface of the carbon protective layer exposed to a high humidity atmosphere tends to absorb moisture from the atmosphere, forming a hydrocarbon layer on the surface. When this hydrocarbon layer is formed under appropriate conditions, it strongly adheres to the fluorocarbon-based liquid lubricant applied on top of it, forming a stable lubricating layer, resulting in excellent surface lubrication properties and significantly increased durability. An improved medium will be obtained. Suitable atmospheric conditions include a temperature of 30° C. or higher and 60° C. or lower, and a relative humidity of 70% or higher. It is effective if the exposure time in the atmosphere is at least 1 hour or more.
Ｍ合金基板表面に無電解めっき法でＮ１−Ｐ合金層を形
成し、その表面を研磨し、テクスチャーを施して表面粗
さが中心線平均粗さＲａで６０人である基板とする。こ
の基板上にスパッタ法によりＣｒ下地層、 Ｃｏ合金磁
性層、Ｃ保護層を順次成膜した。An N1-P alloy layer is formed on the surface of an M alloy substrate by electroless plating, and the surface is polished and textured to obtain a substrate with a centerline average roughness Ra of 60. A Cr underlayer, a Co alloy magnetic layer, and a C protective layer were sequentially formed on this substrate by sputtering.
Ｃ保護層の膜厚は耐磨耗性、磁気ヘッドとのスペーシン
グロスを考慮して約３５０人とした。続いて、このＣ保
護層まで成膜した基板を第１表に示すように温度、湿度
を変えた雰囲気中に１０時間放置した。その後、Ｃ保護
層上にフロロカーボン系の液体潤滑剤フォンブリンＺ（
商品名；モンテジソン社製〉を浸漬法で約１５人の厚さ
に塗布して潤滑層を形成し媒体とした。潤滑層の好適な
膜厚は基板の表面粗さにより異なるが、５Ａ〜３０Ａの
範囲内で良好な結果が得られる。The thickness of the C protective layer was set to about 350 in consideration of wear resistance and spacing loss with the magnetic head. Subsequently, the substrate on which the C protective layer was formed was left for 10 hours in an atmosphere whose temperature and humidity were varied as shown in Table 1. After that, a fluorocarbon-based liquid lubricant Fomblin Z (
A lubricating layer was formed by applying the product (trade name: manufactured by Montegisson) to a thickness of about 15 mm using a dipping method to form a medium. The preferred thickness of the lubricant layer varies depending on the surface roughness of the substrate, but good results can be obtained within the range of 5A to 30A.
このようにして作製された媒体について潤滑特性を評価
した。評価は媒体表面にモノリシックタイプのＭｎ−Ｚ
ｎフェライトヘッドを接触させ（荷重１０ｇｆ） 、１
３５０ｃｍ／分の速度で摺動させ、１時間後の摺動摩擦
係数μを測定し、また、媒体表面の磨耗状態を観察する
ことにより行った。The lubricating properties of the medium thus produced were evaluated. The evaluation is based on monolithic type Mn-Z on the media surface.
n Contact the ferrite head (load 10 gf), 1
This was done by sliding at a speed of 350 cm/min, measuring the sliding friction coefficient μ after 1 hour, and observing the state of wear on the surface of the medium.
その評価結果を第１表にＣ保護層まで成膜した基板を放
置した雰囲気条件と対応させて示す。The evaluation results are shown in Table 1 in correspondence with the atmospheric conditions under which the substrates formed up to the C protective layer were left.
第
表
第１表に見られるとおり、３０℃、 ８０％の雰囲気お
よび５０℃、７０％の雰囲気にさらした後に潤滑層を形
成した媒体は、摺動後の摩擦係数μが小さく表面の磨耗
による傷も認められず優れた潤滑特性を有することが判
る。また、１５℃、８０％の雰囲気の場合には、表面状
態は変化なく良好であるが、摩擦係数μがかなり大きい
。これらの結果より、雰囲気条件としては、温度３０℃
以上６０℃以下で相対湿度７０％以上が好適であること
が判る。As shown in Table 1, the media that formed a lubricating layer after being exposed to an atmosphere of 80% at 30°C and an atmosphere of 70% at 50°C have a small coefficient of friction μ after sliding, which is due to surface wear. No scratches were observed, indicating that it had excellent lubricating properties. Further, in the case of an atmosphere of 15° C. and 80%, the surface condition remains good without any change, but the coefficient of friction μ is quite large. From these results, the atmospheric conditions are as follows:
It can be seen that a temperature of 60° C. or lower and a relative humidity of 70% or higher is preferable.
この発明によれば、液体潤滑剤を塗布する前の炭素保護
層表面を高湿雰囲気にさらす製造方法とすることにより
、液体潤滑剤は炭素保護層表面に強固に密着し安定した
潤滑層が形成されることになり、潤滑特性の大幅に改善
された磁気記録媒体が得られることになる。According to this invention, by using a manufacturing method that exposes the surface of the carbon protective layer to a high humidity atmosphere before applying the liquid lubricant, the liquid lubricant firmly adheres to the surface of the carbon protective layer, forming a stable lubricating layer. As a result, a magnetic recording medium with significantly improved lubrication properties can be obtained.
Claims (1)
層された炭素保護層とを備え、さらにこの炭素保護層上
にフロロカーボン系の液体潤滑剤を塗布した潤滑層を備
えてなる磁気記録媒体の製造方法において、液体潤滑剤
を塗布する前の炭素保護層表面を高湿雰囲気にさらすこ
とを特徴とする磁気記録媒体の製造方法。1) A magnetic device comprising a ferromagnetic metal thin film magnetic layer on a non-magnetic substrate, a carbon protective layer laminated thereon, and a lubricating layer coated with a fluorocarbon-based liquid lubricant on the carbon protective layer. A method for manufacturing a magnetic recording medium, which comprises exposing the surface of a carbon protective layer to a high humidity atmosphere before applying a liquid lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22573289A JPH0388123A (en) | 1989-08-31 | 1989-08-31 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22573289A JPH0388123A (en) | 1989-08-31 | 1989-08-31 | Production of magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0388123A true JPH0388123A (en) | 1991-04-12 |
Family
ID=16833960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22573289A Pending JPH0388123A (en) | 1989-08-31 | 1989-08-31 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0388123A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010185889A (en) * | 2010-06-02 | 2010-08-26 | Panasonic Corp | Device for measuring flow rate |
-
1989
- 1989-08-31 JP JP22573289A patent/JPH0388123A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010185889A (en) * | 2010-06-02 | 2010-08-26 | Panasonic Corp | Device for measuring flow rate |
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