JPH0334609B2 - - Google Patents
Info
- Publication number
- JPH0334609B2 JPH0334609B2 JP12197483A JP12197483A JPH0334609B2 JP H0334609 B2 JPH0334609 B2 JP H0334609B2 JP 12197483 A JP12197483 A JP 12197483A JP 12197483 A JP12197483 A JP 12197483A JP H0334609 B2 JPH0334609 B2 JP H0334609B2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- ferromagnetic thin
- magnetic recording
- recording medium
- substrate
- 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.)
- Expired
Links
- 230000005294 ferromagnetic effect Effects 0.000 claims description 19
- 230000005291 magnetic effect Effects 0.000 claims description 17
- 239000010409 thin film Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims description 3
- 239000010408 film Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 235000021357 Behenic acid Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/858—Producing a magnetic layer by electro-plating or electroless plating
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
本発明は磁気記録媒体の製造方法に関するもの
である。
高分子フイルム等の基体に強磁性体金属を真空
蒸着等により付着して強磁性薄膜を形成した磁気
テープ等の磁気記録媒体は、従来の塗布型に比べ
て記録密度が高く、最近、実用化されるようにな
つてきた。
ところで、このような磁気記録媒体は、磁性層
が薄いために、走行時等に磁気ヘツド等により容
易に損傷し易い欠点がある。このような欠点を改
良するために、強磁性薄膜の表面に塗布等により
保護層を設け、耐摩耗性を付与している。
しかしながら従来の保護層はピンホールが多
く、空気中の湿気等がこのピンホールから侵入し
て容易に強磁性薄膜を腐食する欠点があつた。
本発明は、以上の欠点を改良し、耐候性の向上
しうる磁気記録媒体の製造方法の提供を目的とす
るものである。
本発明は、上記の目的を達成するために、基体
に強磁性薄膜を形成した磁気記録媒体の製造方法
において、強磁性薄膜形成後の基体を電離性物質
を含む溶液または溶融液中に浸漬し、前期強磁性
薄膜に電場を印加して前期強磁性薄膜表面に保護
膜を設けることを特徴とする磁気記録媒体の製造
方法を提供するものである。
以下、本発明の実施例を図面に基づいて説明す
る。
先ず、基体としてポリエステルやポリエチレ
ン、ポリエチレンテレフタレート、ポリプロピレ
ン等の高分子物質、セラミツク等を用い、この基
体に、鉄やコバルト、ニツケルあるいはこれらの
合金、フエライト等の強磁性化合物等の強磁性体
金属を、真空蒸着法やイオンプレーテイング法、
スパツタリング法等の方法により付着し、強磁性
薄膜を形成する。
次に、この強磁性薄膜形成後の基体を電離性物
質を含む、任意の温度に加熱された溶液または溶
融液中に浸漬する。電離性物質としては、ステア
リン酸やベヘン酸、パルミチン酸等の脂肪酸や界
面活性剤、フタロシアニン等の有機金属錯体等が
用いられる。なお、電離度を向上するために溶液
等にLiClO4等の支持塩を添加してもよい。
この溶液または溶融液の充填された構内には、
白金や黒鉛等の水素過電圧の小さい物質からなる
電極が基体と対向するように配設されている。そ
して基体に形成された強磁性薄膜と電極との間に
電場を印加して、強磁性薄膜の表面に保護膜を形
成し、磁気記録媒体を製造する。
すなわち、本発明によれば保護膜を、電離され
た液を用いて形成しているので、ピンホールが少
なく、湿気等が保護膜を透過する量を著しく減少
でき、磁気記録媒体の耐候性が向上する。
例えば、ポリエステルの基体にコバルトを真空
蒸着して強磁性薄膜を形成したものを、ステアリ
ン酸の溶液に浸漬し電圧を印加して保護層を形成
した本発明によるものと、電圧を印加せずに保護
層を形成した従来例によるものとについて、残留
磁束密度の減衰特性を測定したところ表の通りの
結果が得られた。なお、雰囲気は、温度が60℃、
The present invention relates to a method of manufacturing a magnetic recording medium. Magnetic recording media such as magnetic tapes, in which a ferromagnetic thin film is formed by attaching a ferromagnetic metal to a substrate such as a polymer film by vacuum deposition, have a higher recording density than conventional coated media, and have recently been put into practical use. It's starting to be done. However, since the magnetic layer of such a magnetic recording medium is thin, it has the disadvantage that it is easily damaged by a magnetic head or the like during running. In order to improve these drawbacks, a protective layer is provided on the surface of the ferromagnetic thin film by coating or the like to impart wear resistance. However, the conventional protective layer has many pinholes, and has the disadvantage that moisture in the air can enter through the pinholes and easily corrode the ferromagnetic thin film. The object of the present invention is to provide a method for manufacturing a magnetic recording medium that can improve the above-mentioned drawbacks and improve weather resistance. In order to achieve the above object, the present invention provides a method for manufacturing a magnetic recording medium in which a ferromagnetic thin film is formed on a substrate, in which the substrate after the ferromagnetic thin film is formed is immersed in a solution or melt containing an ionizable substance. The present invention provides a method for manufacturing a magnetic recording medium, characterized in that a protective film is provided on the surface of the ferromagnetic thin film by applying an electric field to the ferromagnetic thin film. Embodiments of the present invention will be described below based on the drawings. First, a polymer material such as polyester, polyethylene, polyethylene terephthalate, polypropylene, ceramic, etc. is used as a base, and a ferromagnetic metal such as iron, cobalt, nickel, or an alloy thereof, or a ferromagnetic compound such as ferrite is applied to this base. , vacuum evaporation method, ion plating method,
It is deposited by a method such as sputtering to form a ferromagnetic thin film. Next, the substrate on which the ferromagnetic thin film has been formed is immersed in a solution or melt containing an ionizable substance and heated to an arbitrary temperature. As the ionizable substance, fatty acids such as stearic acid, behenic acid, and palmitic acid, surfactants, and organometallic complexes such as phthalocyanine are used. Note that a supporting salt such as LiClO 4 may be added to the solution etc. in order to improve the degree of ionization. In this solution or melt-filled premises,
An electrode made of a material with low hydrogen overvoltage, such as platinum or graphite, is arranged to face the substrate. Then, an electric field is applied between the ferromagnetic thin film formed on the substrate and the electrode to form a protective film on the surface of the ferromagnetic thin film, thereby producing a magnetic recording medium. That is, according to the present invention, since the protective film is formed using an ionized liquid, there are fewer pinholes, the amount of moisture etc. that permeates through the protective film can be significantly reduced, and the weather resistance of the magnetic recording medium is improved. improves. For example, a protective layer according to the present invention is formed by immersing a ferromagnetic thin film by vacuum-depositing cobalt on a polyester base in a stearic acid solution and applying a voltage; When the attenuation characteristics of the residual magnetic flux density were measured for the conventional example in which a protective layer was formed, the results shown in the table were obtained. The temperature of the atmosphere is 60℃,
【表】
相対湿度が90％である。すなわち、６週間経過
後、本発明によるものは残留磁束密度の減衰量が
2.5％であるのに対して、従来例のそれは18％で
あり、前者による方が残留磁束密度の減衰量がは
るかに少なく、耐候性が向上している。
以上の通り、本発明によるば、ピンホールの少
ない保護層を形成できるので耐候性を改良しうる
磁気記録媒体の製造方法が得られる。[Table] Relative humidity is 90%. That is, after 6 weeks, the amount of attenuation of the residual magnetic flux density in the device according to the present invention is
While it is 2.5%, it is 18% in the conventional example, and the former has a much smaller attenuation of residual magnetic flux density and improved weather resistance. As described above, according to the present invention, it is possible to form a protective layer with fewer pinholes, thereby providing a method for manufacturing a magnetic recording medium that can improve weather resistance.
Claims (1)
製造方法において、強磁性薄膜形成後の基体を電
離性物質を含む溶液または溶融液中に浸漬し、前
記強磁性薄膜に電場を印加して前記強磁性薄膜表
面に保護層を設けることを特徴とする磁気記録媒
体の製造方法。1. In a method for manufacturing a magnetic recording medium in which a ferromagnetic thin film is formed on a substrate, the substrate after the ferromagnetic thin film is formed is immersed in a solution or melt containing an ionizable substance, and an electric field is applied to the ferromagnetic thin film to produce the A method for manufacturing a magnetic recording medium, comprising providing a protective layer on the surface of a ferromagnetic thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12197483A JPS6018824A (en) | 1983-07-05 | 1983-07-05 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12197483A JPS6018824A (en) | 1983-07-05 | 1983-07-05 | Production of magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6018824A JPS6018824A (en) | 1985-01-30 |
| JPH0334609B2 true JPH0334609B2 (en) | 1991-05-23 |
Family
ID=14824464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12197483A Granted JPS6018824A (en) | 1983-07-05 | 1983-07-05 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6018824A (en) |
-
1983
- 1983-07-05 JP JP12197483A patent/JPS6018824A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6018824A (en) | 1985-01-30 |
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