JPS6292116A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6292116A JPS6292116A JP19782086A JP19782086A JPS6292116A JP S6292116 A JPS6292116 A JP S6292116A JP 19782086 A JP19782086 A JP 19782086A JP 19782086 A JP19782086 A JP 19782086A JP S6292116 A JPS6292116 A JP S6292116A
- Authority
- JP
- Japan
- Prior art keywords
- film layer
- base film
- thin ferromagnetic
- ferromagnetic metallic
- recording medium
- 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
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は強磁性金属薄膜型磁気記録媒体に関し、さら
に詳しくは磁気特性および耐擦傷性に優れた強磁性金属
薄膜型磁気記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ferromagnetic metal thin film type magnetic recording medium, and more particularly to a ferromagnetic metal thin film type magnetic recording medium having excellent magnetic properties and scratch resistance.
近年、磁気記録の高密度化に対応して、ポリエステル、
ポリイミド、ポリアミド等の高分子成形物からなるベー
スフィルム上に、強磁性金属またはその合金あるいはこ
れらの金属を含む化合物からなる強磁性金属薄膜層を蒸
着等によって被着形成した強磁性金属薄膜型磁気記録媒
体が開発されている。この種の磁気記録媒体は、従来の
磁性粉末を有限バインダー中に分散して塗布する生布型
磁気記録媒体に比べ高密度記録に通した特性を有するが
、高分子成形物からなるベースフィルムが結晶質部分と
無定形部分とからなる微細な結晶性組織を有し本質的に
不均一である上に、延伸などの機械的処理による配向組
織や、表面の平？ｈ性を調節するための充填粒子の存在
、さらに汚染物質の吸着などによって表面がさらに不均
一になり、このベースフィルム表面の不均一性が原因と
なってこの上に茎着等によって被着形成される強磁性金
属薄膜層が不均一になり易く、このためノイズが高くな
り、又出力変動も大きくなって所望の磁気特性を有する
強磁性金属薄膜層が得られ乙こくい難点がある。In recent years, in response to the increasing density of magnetic recording, polyester,
A ferromagnetic metal thin film type magnet in which a ferromagnetic metal thin film layer made of a ferromagnetic metal, its alloy, or a compound containing these metals is formed by vapor deposition on a base film made of a polymer molded product such as polyimide or polyamide. Recording media are being developed. This type of magnetic recording medium has characteristics that enable high-density recording compared to conventional cloth-type magnetic recording media in which magnetic powder is dispersed and coated in a finite binder, but the base film made of a polymer molded material is It has a fine crystalline structure consisting of a crystalline part and an amorphous part, and is essentially non-uniform.In addition, it has an oriented structure due to mechanical processing such as stretching, and a flat surface. The surface becomes even more uneven due to the presence of filler particles to adjust the hardness and the adsorption of contaminants, and this unevenness of the base film surface causes adhesion to form on this base film due to adhesion, etc. The resulting ferromagnetic metal thin film layer tends to be non-uniform, resulting in high noise and large output fluctuations, making it difficult to obtain a ferromagnetic metal thin film layer with desired magnetic properties.
そこで、このような欠点を克服する手段として強磁性金
属薄膜層の下に非磁性全屈（アルミニウム）からなる一
層の下地膜層を介在させることが提案されている。Therefore, as a means to overcome these drawbacks, it has been proposed to interpose a single base film layer made of non-magnetic aluminum (aluminum) under the ferromagnetic metal thin film layer.
ところが、アルミニウム金属からなる下地膜層では充分
に満足できる磁気特性が得られない。However, sufficiently satisfactory magnetic properties cannot be obtained with the base film layer made of aluminum metal.
この発明はかかる問題を解決するため種々検討を行った
結果なされたもので、基体と強磁性金属薄膜層との間に
介在させる下地膜層を、モリブデン、ゲルマニウムから
選ばれる少なくとも１種の金属を含んだ層で形成するこ
とにより所期の目的を達成したものである。This invention was made as a result of various studies to solve this problem, and the base film layer interposed between the substrate and the ferromagnetic metal thin film layer is made of at least one metal selected from molybdenum and germanium. The desired purpose was achieved by forming a layer containing the same.
この発明によれば、強磁性金属薄膜層と接する下地膜層
は結晶成長が均一な前記金属で形成されているため、平
滑性のよい緻密な下地膜層が形成され、このためこの下
地膜層上には均一でかつ平滑性に優れた強磁性金属薄膜
層が形成されて磁気特性も改善され、又耐擦傷性も改善
される。このようにこの発明によれば、この下地膜層に
よって磁気特性および耐擦傷性に優れた強磁性金属薄膜
層を存する磁気記録媒体が得られる。According to this invention, since the base film layer in contact with the ferromagnetic metal thin film layer is formed of the metal with uniform crystal growth, a dense base film layer with good smoothness is formed. A ferromagnetic metal thin film layer that is uniform and has excellent smoothness is formed thereon, improving magnetic properties and scratch resistance. As described above, according to the present invention, a magnetic recording medium having a ferromagnetic metal thin film layer with excellent magnetic properties and scratch resistance due to the underlayer can be obtained.
この発明において、高分子形成物などからなる基体への
下地ＨｆＪ層および強磁性金属薄膜層の形成は、真空蒸
着、イオンプレーティング、スパッタリング、メッキ等
の手段によって行なわれ、基体としてはガラス、表面に
酸化膜を有するアルミニウム金属、あるいはポリエステ
ル、ポリイミド、ポリアミド等一般に使用されている高
分子成形物からなるベースフィルムが使用される。In this invention, the base HfJ layer and the ferromagnetic metal thin film layer are formed on a substrate made of a polymeric product by means such as vacuum evaporation, ion plating, sputtering, or plating. A base film made of aluminum metal having an oxide film or a commonly used polymer molded product such as polyester, polyimide, polyamide, etc. is used.
また、この発明で使用される下地膜層の形成材料として
は、モリブデン、ゲルマニウム等の金属が好適なものと
して使用され、これらは単独で、あるいは併用して、も
しくはクロム、タンタル、ニッケルなどと併用して使用
される。これらの金属は結晶成長が均一であるため平滑
性のよい緻密な下地ｌＩ！ｉ！層が形成され、従ってこ
の上に形成される強磁性金属薄膜層は均一かつ平滑性に
優れたものとなり、磁気特性が改善される。下地膜層の
層厚は、充分な下地膜効果を発揮し、かつ基体と下地膜
層との熱膨張係数の相違にもとづく下地膜層の微細な割
れや熱変形を防止するため２００〜２０００人の範囲に
するのが適当である。In addition, metals such as molybdenum and germanium are preferably used as materials for forming the base film layer used in this invention, and these may be used alone or in combination, or in combination with chromium, tantalum, nickel, etc. used. These metals have uniform crystal growth, so they form a dense base with good smoothness! i! Therefore, the ferromagnetic metal thin film layer formed thereon is uniform and has excellent smoothness, and the magnetic properties are improved. The thickness of the base film layer is set at 200 to 2000 in order to exhibit sufficient base film effect and to prevent minute cracks and thermal deformation of the base film layer due to the difference in thermal expansion coefficient between the base and the base film layer. It is appropriate to keep it within the range of .
強磁性金属薄膜層を形成する磁性材としては、コバルト
、ニッケル、鉄などの全屈単体の他、ニハルトーニノケ
ル、コバルト−鉄、コバルト−クロム、コバルト−ニッ
ケルークロムなどの合金漬るいは酸化物、およびＣｏ−
Ｐ、 Ｃｏ−Ｎ１−Ｐなどが好適なちとして使用される
。The magnetic materials forming the ferromagnetic metal thin film layer include total bending elements such as cobalt, nickel, and iron, as well as alloys such as nihaltoni-nokel, cobalt-iron, cobalt-chromium, and cobalt-nickel-chromium. oxide, and Co-
P, Co-N1-P, etc. are preferably used.
基体として高分子成形物からなるベースフィルムを使用
する場合には、このベースフィルムとモリブデン、ゲル
マニウム金属からなる下地膜層との接着性に幾分難点が
あるため、この下地膜層と基体との間に、酸化アルミニ
ウム（Ａ Ｉ ２０３ ）および５ｉＯ１Ｓｉ０２など
の酸化ケイ素の上置ＨＵＦＦを介在させるのが好ましく
、これらの下地膜層を介在させると、ベースフィルムと
モリブデン、ゲルマニウム金属からなる下地膜層との接
着性がより改善される。When using a base film made of a polymer molded product as a substrate, there are some difficulties in adhesion between this base film and a base film layer made of molybdenum or germanium metal. It is preferable to interpose an overlying HUFF of silicon oxide such as aluminum oxide (A I 203 ) and 5iO1Si02 between the base film and the base film layer made of molybdenum or germanium metal. The adhesion is further improved.
次に、この発明の実施例について説明する。 Next, embodiments of the invention will be described.
実施例１〜４
約６μ厚のポリエステルヘースフィルムに表面処理（Ａ
ｒガス、ボンバード処理）を施した後、これを真空蒸着
装置に装填し、下記第１表に示す第１蒸着物をそれぞれ
の条件で蒸発させて第１の下地膜層を形成し、次いで同
表に示す第２蒸着物をそれぞれの条件で蒸発させて第２
の下地膜層を形成した。Examples 1 to 4 Surface treatment (A
r gas, bombardment treatment), this is loaded into a vacuum evaporation device, and the first evaporated material shown in Table 1 below is evaporated under the respective conditions to form a first base film layer. The second evaporated material shown in the table is evaporated under the respective conditions.
A base film layer was formed.
第 １ 表
次に、この二層構造の下地膜層を形成したベースフィル
ム上に酸素圧５ＸＩＯ−’トールの残留ガス圧の下で、
コバルト金属を２０００人の膜厚になるように蒸着して
強磁性金属薄膜層を形成した。コバルト金属の蒸着はコ
バルト金属の蒸気の入射方向とベースフィルムの法線方
向とのなす角（入射角）が４５°Ｃ以上となるように落
着装置内に防着板を設けて連続斜め入射原着を行った。Table 1 Next, under a residual gas pressure of oxygen pressure 5XIO-'Torr on the base film on which the base film layer of this two-layer structure was formed,
A ferromagnetic metal thin film layer was formed by depositing cobalt metal to a thickness of 2000 nm. For vapor deposition of cobalt metal, a deposition prevention plate is installed in the deposition device so that the angle between the incident direction of cobalt metal vapor and the normal direction of the base film (incident angle) is 45°C or more. I got dressed.
これを所定の巾に裁断して磁気テープをつくった。This was cut to a predetermined width to make magnetic tape.
比較例１
実施例において、第２蒸着物の落着を省いて下地膜層を
一層にし、第１蒸着物としてＡｌ２Ｏ３を使用し、膜厚
が５００人となるように蒸着して第１の下地膜層を形成
した以外は実施例と同様にして磁気テープをつくった。Comparative Example 1 In the example, the deposition of the second evaporated material was omitted and the base film layer was made into a single layer, and Al2O3 was used as the first evaporated material, and the film was deposited to a thickness of 500 nm to form the first base film. A magnetic tape was produced in the same manner as in the example except that the layers were formed.
比較例２
比較例１において、第１蒸着物としてＡｌ２Ｏ３に替え
てＳｉＯ２を使用した以外は比較例１と同様にして磁気
テープをつくった。Comparative Example 2 A magnetic tape was produced in the same manner as in Comparative Example 1 except that SiO2 was used instead of Al2O3 as the first vapor deposited material.
比較例３
実施例１において、第１蒸着物による第１の下地膜層を
形成せず、第２蒸着物としてＡＩ金金属５００人の厚さ
で蒸着させてＡＩ金金属下地膜層を形成した以外は、実
施例１と同様にして磁気テープをつ（った。Comparative Example 3 In Example 1, the first base film layer was not formed using the first deposit, but the AI gold metal base film layer was formed by depositing AI gold metal to a thickness of 500 mm as the second deposit. A magnetic tape was prepared in the same manner as in Example 1 except for this.
各実施例および各比較例で得られた磁気テープについて
保磁力（１−（ｃ ）および角型（Ｂｒ／８ｍ）を１ｊ
ｉ１１定し、接着力および耐擦傷性を試験した。The coercive force (1-(c)) and square shape (Br/8m) of the magnetic tapes obtained in each example and each comparative example were determined by 1j
i11 and tested for adhesion and scratch resistance.
接着力はセロテープ剥離試験及びダイヤモンド描画試験
方法で行ない、耐擦傷性は脱脂綿による（５傷試験方法
で行なった。下記第２表はその結果である。Adhesive strength was tested using cellophane tape peeling test and diamond drawing test method, and scratch resistance was tested using absorbent cotton (5 scratch test method). Table 2 below shows the results.
第２表
〔発明の効果〕
上記第２表らか明らかなように、この発明によって得ら
れた磁気テープ（実施例１〜４）はＡ１２０３からなる
一層の下地層を形成して得られた磁気テープ（比較例１
）、ＳｉＯ２からなる一層の下地膜層を形成して得られ
た磁気テープ（比較例２）およびＡＩ金属下地膜層を形
成して得られた磁気テープ（比較例３）に比し、いずれ
も保磁力が大きく、角型も比較的高くて磁気特性に優れ
ていることがわかる。さらにこの発明によって（厚られ
た磁気テープ（実施例１〜４）は比較例Ｉ、２および３
に比しいずれも耐［４（ｌｉ性が良好で耐擦傷性も改善
されていることがわかる。Table 2 [Effects of the Invention] As is clear from Table 2 above, the magnetic tapes obtained by the present invention (Examples 1 to 4) are magnetic tapes obtained by forming a single underlayer made of A1203. Tape (Comparative Example 1
), compared to the magnetic tape obtained by forming a single base film layer made of SiO2 (Comparative Example 2) and the magnetic tape obtained by forming an AI metal base film layer (Comparative Example 3), both It can be seen that the coercive force is large, the square shape is relatively high, and the magnetic properties are excellent. Furthermore, according to the present invention (thickened magnetic tapes (Examples 1-4) were used in Comparative Examples I, 2 and 3
It can be seen that both have good resistance to [4(li) and improved scratch resistance.
Claims (1)
１種以上の金属を含んでなる下地膜層を形成し、この下
地膜層上に強磁性金属薄膜層を形成したことを特徴とす
る磁気記録媒体1. A magnetic recording medium characterized in that a base film layer containing one or more metals selected from molybdenum and germanium is formed on a substrate, and a ferromagnetic metal thin film layer is formed on this base film layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19782086A JPS6292116A (en) | 1986-08-23 | 1986-08-23 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19782086A JPS6292116A (en) | 1986-08-23 | 1986-08-23 | Magnetic recording medium |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10830579A Division JPS5634141A (en) | 1979-08-25 | 1979-08-25 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6292116A true JPS6292116A (en) | 1987-04-27 |
| JPS6330691B2 JPS6330691B2 (en) | 1988-06-20 |
Family
ID=16380884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19782086A Granted JPS6292116A (en) | 1986-08-23 | 1986-08-23 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6292116A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324395A (en) * | 1989-06-20 | 1991-02-01 | Nissan Motor Co Ltd | Hose clamp |
| JPH051090U (en) * | 1991-06-26 | 1993-01-08 | 株式会社東郷製作所 | Horse clip |
| JPH0497196U (en) * | 1991-10-01 | 1992-08-21 |
-
1986
- 1986-08-23 JP JP19782086A patent/JPS6292116A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6330691B2 (en) | 1988-06-20 |
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