JPS62202330A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS62202330A JPS62202330A JP3666687A JP3666687A JPS62202330A JP S62202330 A JPS62202330 A JP S62202330A JP 3666687 A JP3666687 A JP 3666687A JP 3666687 A JP3666687 A JP 3666687A JP S62202330 A JPS62202330 A JP S62202330A
- Authority
- JP
- Japan
- Prior art keywords
- cobalt
- magnetic layer
- substrate
- coercive force
- vapor deposition
- 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 26
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 8
- 239000010941 cobalt Substances 0.000 claims abstract description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 6
- 238000007740 vapor deposition Methods 0.000 claims abstract description 6
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 239000011651 chromium Substances 0.000 claims abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 4
- 238000000151 deposition Methods 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 239000011230 binding agent Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 229920006267 polyester film Polymers 0.000 abstract description 3
- 229920001169 thermoplastic Polymers 0.000 abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 abstract description 2
- 238000001771 vacuum deposition Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
- Paints Or Removers (AREA)
- Physical Vapour Deposition (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２Ｗａの磁性層を形成した磁気記録媒体の！！
ｉ造方決方法する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording medium having a 2Wa magnetic layer formed thereon. !
I decide how to make it.
従来の技術
オーディオ用テープ等の磁気記録媒体は、プラスチック
フィルムに強磁性金属を塗布した′ｂのが製作されてい
るが、オーディオ信号のように低周波から高周波に至る
広帯域の電気的信号は周波数によって磁性層が再生時に
寄与する部分が異なる。Conventional technologyMagnetic recording media such as audio tapes are manufactured by coating a plastic film with ferromagnetic metal, but wide-band electrical signals ranging from low frequencies to high frequencies, such as audio signals, are The portion that the magnetic layer contributes to during reproduction differs depending on the type.
特に高周波信号は磁性層の表面しか再生に寄与せず、最
近ではこれを改良するため磁性層を２層にした磁気記録
媒体が製造されるようになってきた。In particular, high frequency signals only contribute to reproduction from the surface of the magnetic layer, and recently, to improve this, magnetic recording media with two magnetic layers have been manufactured.
この２層のものは、第１層に抗磁力の小さい強磁性体を
塗布し、第２層に抗磁力が大なる強磁性体を塗布したも
ので高周波特性が改善されるようになった。In this two-layer structure, the first layer is coated with a ferromagnetic material having a small coercive force, and the second layer is coated with a ferromagnetic material having a large coercive force, resulting in improved high frequency characteristics.
発明が解決しようとする問題点
従来の２層型の磁気記録媒体は、第２＠にコバルトドー
プ酸化鉄を熱可塑性バインダ中に分散させたものを塗布
して形成しているので、高抗磁力の磁性層が得られ難く
、高周波信号の再生も所定以上の特性が得られない欠点
があった。Problems to be Solved by the Invention Conventional two-layer magnetic recording media have a high coercive force because the second layer is coated with cobalt-doped iron oxide dispersed in a thermoplastic binder. It is difficult to obtain a magnetic layer, and there are disadvantages in that it is difficult to obtain a high-frequency signal reproduction characteristic.
問題点を解決するための手段
本発明は、第１磁性層の上に基体に対する入射角が７０
度以上の角度でコバルト又はコバルトニッケル合金を斜
め蒸着法により付着させ形成する磁気記録媒体の製造方
法を提供する。Means for Solving the Problems The present invention provides a first magnetic layer with an angle of incidence of 70° relative to the substrate.
Provided is a method for manufacturing a magnetic recording medium in which cobalt or a cobalt-nickel alloy is deposited at an angle of at least 100 degrees using an oblique evaporation method.
実施例
本発明の実施例を図面に基づき説明すると、１はポリエ
ステルフィルム等のベースとなる基体であり、この基体
１上に熱可塑性バインダー中に抗磁力の小さい強磁性金
属からなるフェライトやクロムを分散したものを塗布又
は真空蒸着法により第１磁性層２を形成する。この第１
磁性層の上に高抗磁力をうるために、コバルト、コバル
トニッケル合金又はコバルトドープの酸化鉄等の強磁性
体を斜め蒸着法により第２磁性層３を形成する。EXAMPLE An example of the present invention will be explained based on the drawings. Reference numeral 1 is a base such as a polyester film, and on this base 1, ferrite or chromium made of a ferromagnetic metal with a small coercive force is coated in a thermoplastic binder. The first magnetic layer 2 is formed by coating or vacuum evaporation the dispersed material. This first
In order to obtain a high coercive force on the magnetic layer, the second magnetic layer 3 is formed using a ferromagnetic material such as cobalt, cobalt-nickel alloy, or cobalt-doped iron oxide by oblique vapor deposition.
この斜め蒸着は、基体１に対する法線から所定角度の入
射角をもって強磁性体金属を斜めに付着させる技術であ
る。ポリエステルフィルムにコバルトを蒸着した場合Ａ
とガラスにコバルトを蒸着した場合Ｂにその入射角を変
えたときの抗磁力の変化を第２図に表わしている。この
グラフから明らかなように、入射角は抗磁力が急激に」
曽大する７０度以上がよい。This oblique vapor deposition is a technique in which ferromagnetic metal is obliquely deposited at a predetermined incident angle from the normal to the substrate 1 . When cobalt is vapor-deposited on polyester film A
Figure 2 shows the change in the coercive force when the incident angle is changed in the case B when cobalt is vapor-deposited on glass. As is clear from this graph, the coercive force increases rapidly at the incident angle.
A temperature of 70 degrees or higher is best.
第２磁・回層３は入射角を７０度以上に設定して、真空
蒸着することにより容易に抗磁力の大なる強磁性層がえ
らるので、オーディオ信号等の高周波領域のリニアリテ
ィや信号の再生特性が改善される。The second magnetic layer 3 can be vacuum-deposited with an incident angle of 70 degrees or more, making it easy to obtain a ferromagnetic layer with a large coercive force. Reproduction characteristics are improved.
発明の効果
以上に述べた通り、本発明の方法で製造したものは、高
周波信号の再生特性で優れた性能を１を揮する磁気記録
媒体かえられる。Effects of the Invention As described above, the magnetic recording medium manufactured by the method of the present invention can be used as a magnetic recording medium that exhibits excellent performance in reproducing high frequency signals.
第１図は本発明の断面図、第２図は入射角と抗磁力との
関係を示す曲線図。
１：基体、２：第１１１性層、３：第２Ｆｊｉ性層。FIG. 1 is a sectional view of the present invention, and FIG. 2 is a curve diagram showing the relationship between the incident angle and coercive force. 1: Substrate, 2: 111th layer, 3: 2nd Fji layer.
Claims (1)
らなる第１磁性層を形成し、この第１磁性層の上に基体
に対する入射角が７０度以上の角度で斜め蒸着法により
コバルト又はコバルトニッケル合金を付着し第２磁性層
を形成することを特徴とする磁気記録媒体の製造方法。(1) A first magnetic layer made of a ferrite or chromium ferromagnetic material is formed on the surface of the substrate, and cobalt or cobalt is deposited on the first magnetic layer by oblique vapor deposition at an angle of incidence of 70 degrees or more with respect to the substrate. A method of manufacturing a magnetic recording medium, comprising depositing a nickel alloy to form a second magnetic layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3666687A JPS62202330A (en) | 1987-02-19 | 1987-02-19 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3666687A JPS62202330A (en) | 1987-02-19 | 1987-02-19 | Production of magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62202330A true JPS62202330A (en) | 1987-09-07 |
Family
ID=12476183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3666687A Pending JPS62202330A (en) | 1987-02-19 | 1987-02-19 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62202330A (en) |
-
1987
- 1987-02-19 JP JP3666687A patent/JPS62202330A/en active Pending
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