JPH0518176B2 - - Google Patents
Info
- Publication number
- JPH0518176B2 JPH0518176B2 JP6875884A JP6875884A JPH0518176B2 JP H0518176 B2 JPH0518176 B2 JP H0518176B2 JP 6875884 A JP6875884 A JP 6875884A JP 6875884 A JP6875884 A JP 6875884A JP H0518176 B2 JPH0518176 B2 JP H0518176B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- lubricant
- metal thin
- recording medium
- ferromagnetic metal
- 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 23
- 239000000314 lubricant Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 230000005294 ferromagnetic effect Effects 0.000 claims description 11
- 239000010409 thin film Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 11
- 239000010408 film Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 229910018553 Ni—O Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 2
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- 229910020517 Co—Ti Inorganic materials 0.000 description 2
- 229910020516 Co—V Inorganic materials 0.000 description 2
- 235000021360 Myristic acid Nutrition 0.000 description 2
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- FPVKHBSQESCIEP-JQCXWYLXSA-N pentostatin Chemical compound C1[C@H](O)[C@@H](CO)O[C@H]1N1C(N=CNC[C@H]2O)=C2N=C1 FPVKHBSQESCIEP-JQCXWYLXSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009489 vacuum treatment Methods 0.000 description 2
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910020634 Co Mg Inorganic materials 0.000 description 1
- 229910020632 Co Mn Inorganic materials 0.000 description 1
- 229910020637 Co-Cu Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- 229910020647 Co-O Inorganic materials 0.000 description 1
- 229910020646 Co-Sn Inorganic materials 0.000 description 1
- 229910020674 Co—B Inorganic materials 0.000 description 1
- 229910020678 Co—Mn Inorganic materials 0.000 description 1
- 229910020704 Co—O Inorganic materials 0.000 description 1
- 229910020707 Co—Pt Inorganic materials 0.000 description 1
- 229910020711 Co—Si Inorganic materials 0.000 description 1
- 229910020710 Co—Sm Inorganic materials 0.000 description 1
- 229910020709 Co—Sn Inorganic materials 0.000 description 1
- 229910020515 Co—W Inorganic materials 0.000 description 1
- 229910020514 Co—Y Inorganic materials 0.000 description 1
- 229910020521 Co—Zn Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003887 surface segregation Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Lubricants (AREA)
- Magnetic Record Carriers (AREA)
Description
産業上の利用分野
本発明は高密度磁気記録に有用な強磁性金属薄
膜を磁気記録層とする磁気記録媒体の製造方法に
関するものである。
従来例の構成とその問題点
近年高密度記録の進展と共に基板面と平行な面
内又は基板面と直交する厚み方向に磁化可能な強
磁性金属薄膜を磁気記録層とする磁気記録媒体が
注目されている。
かかる構成の磁気記録媒体の実用化は、走行
性、耐しよく性、耐摩耗性等の諸特性のバランス
をとる必要があり容易ではない。
第１図は、本発明の対象となる磁気記録媒体の
拡大断面図である。
磁気記録媒体１は基板２及びその上に形成され
た柱状構造体３の集合体である強磁性金属薄膜と
柱状構造体３を覆う滑剤４とから成つている。
ここで滑剤というのは、防錆の役割をするもの
も含んでいる。
一方強磁性金属薄膜に要求される磁気的性能面
から、Co−Cr、Co−Ｖ、Co−Ti、Co−Ｏ、Co
−Ni−Ｏ等のように柱状構造体の表面にCr、Ｖ、
Ti、Ｏ等の元素の偏析があることが有効である
ことも周知である。
この表面偏析は、柱状構造体の防錆能力を大き
くする作用もするが、完全ではないので、滑剤で
更に表面を被覆するのが好ましい。
従来かかる媒体を得る方法として、溶剤に溶か
した滑剤を塗布する時に、基板に超音波振動を与
える方法、真空中で滑剤を柱状構造体のすき間を
見込む角度から蒸着する方法が提案されている
が、理想的に柱状構造体の表面を滑剤で被覆する
ことはできていないと推察される問題がある。
即ち、磁気記録媒体を高温高湿環境に長時間保
存した後、短波長記録再生を行うと、ドロツプア
ウトの異常増加現象が起り、試料振動型磁束計で
磁気記録媒体の有する磁束量の変化は見出せなく
ても、この現象が起るもので改良が望まれる。
発明の目的
本発明は上記事情に鑑みなされたもので、高温
高湿環境保存性の改良された強磁性金属薄膜を磁
気記録層とする磁気記録媒体の製造方法を提供す
るものである。
発明の構成
本発明は構成元素の一部が表面偏析した柱状構
造体より成る強磁性金属薄膜上に滑剤層の形成
を、減圧処理直後、湿式塗布法にて行うもので、
高温高湿環境に保存した後に短波長記録再生を行
つても信号欠落の増加が無視できる磁気記録媒体
を大量に製造できるものである。
実施例の説明
以下本発明の実施例を図面を参照しながら説明
する。
第２図は本発明の製造方法を実施するために用
いた塗布装置の要部構成図である。
被処理材５は、基板２上に柱状構造体３の集合
体からなる強磁性金属薄膜を配したもので、供給
ロール（図示せず）は、真空槽６の内部にあつて
も良いし、大気中であつても良い。
真空槽内部には、加熱ロール７が配されていて
柱状構造体のすき間からの脱ガスを容易に行える
よう構成してある。真空槽６の内部は排気系８に
より絶えず減圧してある。
槽内部での減圧処理は、グロー放電処理をも包
含しているが、ここでは図示してない。
減圧処理された被処理材５は、大気中へ取り出
され、矢印Ａ方向に回転するロールＡ９に沿つた
状態でノズル１０より滑材を溶解した溶剤からな
る塗布液１１を吹きつけられ、矢印Ｂ方向に回転
するロールＢ、１２で計量された量だけ塗布さ
れ、矢印Ｃの方向に移動し、乾燥炉に向う。１３
は真空シール用のゴムローラで、１４は金属ロー
ラ、１５は滑材溶液受である。
以上のような構成の装置を用いることで、柱状
構造体のすき間に滑剤溶液が１Kg／cm2の圧力で侵
入することができ、滑剤による表面被覆の効果は
最大に出来るのである。
本発明の製造方法の適用できる磁気記録媒体の
構成材料のうち、基板としては、ポリエチレンテ
レフタレートなどのポリエステル類、ポリプロピ
レンなどのポリオレフイン類、セルロースジアセ
テート、ニトロセルロースなどのセルロース誘導
体、ポリカーボネート、ポリ塩化ビニル、ポリア
ミド、ポリイミド等があげられ、下塗り層や下地
層、軟磁性層等は適宜用いることができるもので
ある。
強磁性金属薄膜は、Co、Fe、Ni、Co−Fe、
Co−Ni、Co−Ｂ、Co−Cu、Co−Ge、Co−Mn、
Co−Mg、Co−Mo、Co−Pt、Co−Ru、Co−
Rh、Co−Si、Co−Sm、Co−Sn、Co−Gd、Co
−Ta、Co−Ｖ、Co−Ｗ、Co−Ｙ、Co−Zn、Co
−Cr、Co−Ce、Co−Ti、Co−Ni−Cr、Co−Ni
−Mg等及びそれらの部分酸化膜、部分窒化膜、
部分炭化膜等で、磁化容易軸の方向には依存しな
いもので、製法も、電子ビーム蒸着法、スパツタ
リング法、イオンプレーテイング法、無電解めつ
き法等から適宜選択することができるものであ
る。
滑剤として本発明に用いることのできるものは
脂肪酸、脂肪酸エステル、脂肪酸アミド、鉱油、
鯨油などの動植物油、高級アルコール、常温で液
体の不飽和脂肪族炭化水素、フルオロカーボン類
等が挙げられ、塗布方法としては、リバースロー
ル法、キス法、スクイズ法、カーテン法等から適
宜選択することができるものである。
以下に本発明のさらに具体的な一実施例を説明
する。
減圧処理に用いた、加熱ローラの直径は50cmロ
ールＡの直径は20cm、ロールＢの直径は15cmでリ
バースロール方式による塗布によつた。
厚さ12μｍのポリエチレンテレフタレート上
に、１×10-5Tornの酸素雰囲気中で斜め蒸着法
により0.15μｍのCo−Ni−Ｏ（Ni、19％）膜を形
成したものと、同一基板に１×10-2Tornのアル
ゴン雰囲気で、マグネトロンスパツタリング法に
より、0.2μｍのCo−Cr（Cr、21％）垂直磁化膜を
形成したものを準備した。
以上の２種類の被処理材を減圧処理して、メチ
ルエチルケトンに溶かしたミリスチン酸を乾燥時
の厚みが100Åになるよう塗布し、スリツトして
それぞれ磁気テープを得た。
処理条件は次の第１表、第２表のようにした。
INDUSTRIAL APPLICATION FIELD The present invention relates to a method of manufacturing a magnetic recording medium having a magnetic recording layer made of a ferromagnetic metal thin film useful for high-density magnetic recording. Structure of conventional examples and their problems In recent years, with the development of high-density recording, magnetic recording media whose magnetic recording layer is a ferromagnetic metal thin film that can be magnetized in a plane parallel to the substrate surface or in a thickness direction perpendicular to the substrate surface have attracted attention. ing. Practical use of a magnetic recording medium having such a configuration is not easy, as it is necessary to balance various properties such as runnability, durability, and abrasion resistance. FIG. 1 is an enlarged sectional view of a magnetic recording medium to which the present invention is applied. The magnetic recording medium 1 consists of a substrate 2, a ferromagnetic metal thin film which is an aggregate of columnar structures 3 formed on the substrate, and a lubricant 4 covering the columnar structures 3. The lubricant here also includes substances that play a role in preventing rust. On the other hand, in terms of magnetic performance required for ferromagnetic metal thin films, Co-Cr, Co-V, Co-Ti, Co-O, Co
-Cr, V, etc. on the surface of the columnar structure such as Ni-O, etc.
It is also well known that segregation of elements such as Ti and O is effective. Although this surface segregation has the effect of increasing the rust prevention ability of the columnar structure, it is not perfect, so it is preferable to further coat the surface with a lubricant. Conventionally, methods for obtaining such a medium have been proposed, including applying ultrasonic vibration to the substrate when applying a lubricant dissolved in a solvent, and depositing the lubricant in vacuum from an angle that looks into the gaps between the columnar structures. However, there is a problem in which it is assumed that the surface of the columnar structure cannot be ideally coated with a lubricant. In other words, when a magnetic recording medium is stored in a high-temperature, high-humidity environment for a long period of time and then recorded and reproduced at a short wavelength, an abnormal increase in dropout occurs, and a change in the amount of magnetic flux possessed by the magnetic recording medium cannot be detected using a sample vibrating magnetometer. Even if there is no such thing, this phenomenon occurs and improvements are desired. OBJECTS OF THE INVENTION The present invention was made in view of the above circumstances, and provides a method for manufacturing a magnetic recording medium having a magnetic recording layer made of a ferromagnetic metal thin film with improved storage stability in a high temperature and high humidity environment. Structure of the Invention The present invention involves forming a lubricant layer on a ferromagnetic metal thin film consisting of a columnar structure in which some of the constituent elements are segregated on the surface by a wet coating method immediately after treatment under reduced pressure.
It is possible to mass-produce magnetic recording media in which the increase in signal loss is negligible even when recording and reproducing short wavelengths are performed after storage in a high-temperature, high-humidity environment. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a diagram illustrating the main part of a coating device used to carry out the manufacturing method of the present invention. The material to be processed 5 is a ferromagnetic metal thin film made of an aggregate of columnar structures 3 arranged on a substrate 2, and a supply roll (not shown) may be located inside a vacuum chamber 6. It may be in the atmosphere. A heating roll 7 is disposed inside the vacuum chamber to facilitate degassing from the gaps in the columnar structure. The pressure inside the vacuum chamber 6 is constantly reduced by an exhaust system 8. The pressure reduction treatment inside the tank also includes glow discharge treatment, but this is not shown here. The material 5 to be treated under reduced pressure is taken out into the atmosphere, and is sprayed with a coating liquid 11 made of a solvent containing a lubricant dissolved therein from a nozzle 10 along a roll A9 rotating in the direction of arrow A. The measured amount is applied by the rolls B and 12 rotating in the direction shown, and then moved in the direction of the arrow C and headed for the drying oven. 13
1 is a rubber roller for vacuum sealing, 14 is a metal roller, and 15 is a lubricant solution receiver. By using the device configured as described above, the lubricant solution can enter the gaps in the columnar structure at a pressure of 1 kg/cm 2 , and the effect of surface coating with the lubricant can be maximized. Among the constituent materials of the magnetic recording medium to which the manufacturing method of the present invention can be applied, the substrates include polyesters such as polyethylene terephthalate, polyolefins such as polypropylene, cellulose derivatives such as cellulose diacetate and nitrocellulose, polycarbonate, and polyvinyl chloride. , polyamide, polyimide, etc., and an undercoat layer, underlayer, soft magnetic layer, etc. can be used as appropriate. Ferromagnetic metal thin films include Co, Fe, Ni, Co-Fe,
Co-Ni, Co-B, Co-Cu, Co-Ge, Co-Mn,
Co−Mg, Co−Mo, Co−Pt, Co−Ru, Co−
Rh, Co-Si, Co-Sm, Co-Sn, Co-Gd, Co
-Ta, Co-V, Co-W, Co-Y, Co-Zn, Co
−Cr, Co−Ce, Co−Ti, Co−Ni−Cr, Co−Ni
-Mg, etc. and their partial oxide films, partial nitride films,
It is a partially carbonized film, etc., which does not depend on the direction of the axis of easy magnetization, and the manufacturing method can be appropriately selected from electron beam evaporation, sputtering, ion plating, electroless plating, etc. . The lubricants that can be used in the present invention include fatty acids, fatty acid esters, fatty acid amides, mineral oils,
Examples include animal and vegetable oils such as whale oil, higher alcohols, unsaturated aliphatic hydrocarbons that are liquid at room temperature, fluorocarbons, etc. The application method should be selected as appropriate from reverse roll method, kiss method, squeeze method, curtain method, etc. It is something that can be done. A more specific embodiment of the present invention will be described below. The diameter of the heated roller used in the vacuum treatment was 50 cm, the diameter of roll A was 20 cm, and the diameter of roll B was 15 cm, and coating was performed by a reverse roll method. A 0.15 μm Co-Ni-O (Ni, 19%) film was formed on a 12 μm thick polyethylene terephthalate film by oblique evaporation in an oxygen atmosphere of 1×10 -5 Torn, and a 1× Co-Ni-O (Ni, 19%) film was formed on the same substrate. A 0.2 μm Co-Cr (Cr, 21%) perpendicularly magnetized film was prepared by magnetron sputtering in an argon atmosphere of 10 −2 Torn. The above two types of materials to be treated were treated under reduced pressure, coated with myristic acid dissolved in methyl ethyl ketone to a dry thickness of 100 Å, and slit to obtain magnetic tapes. The processing conditions were as shown in Tables 1 and 2 below.
【表】【table】
【表】
比較例として、本発明の処理をしないで、ミリ
スチン酸を塗布する際、基板に超音波振動を与え
たものを調べた。
本発明品と比較列とを各環境に保存した後、記
録再生した時のドロツプアウトを評価した。
磁気ヘツドはCo系のアモルフアス合金ヘツド
でギヤツプ長0.22μｍ、トラツク幅10μｍで記録波
長は0.7μｍで、出力が16dB以上低下したらドロ
ツプアウトとして計数し、１分間当りの個数で測
定テープ長83ｍのうち最大値を記した。[Table] As a comparative example, a substrate was examined in which ultrasonic vibration was applied to the substrate when myristic acid was applied without the treatment of the present invention. After storing the product of the present invention and the comparison column in each environment, dropout during recording and playback was evaluated. The magnetic head is a Co-based amorphous alloy head with a gap length of 0.22 μm, a track width of 10 μm, and a recording wavelength of 0.7 μm.If the output decreases by 16 dB or more, it is counted as a dropout, and the number of heads per minute is the maximum of the measured tape length of 83 m. The value is written down.
【表】
以上のように本実施例によれば、減圧処理後塗
布することで柱状構造体のすき間を十分滑剤で被
覆でき、高温高湿環境とりわけ腐蝕性の強い気体
が介在しても、保護能力を有する磁気記録媒体を
量産することができる。
なお、本実施例では２種類の強磁性金属薄膜の
試料について具体的に効果を示したが、前述の他
の材料の組み合わせにおいても同様の効果を確認
した。
発明の効果
以上のように本発明は、構造元素の一部が表面
偏析した柱状構造体よりなる強磁性金属薄膜上に
滑剤層の形成を減圧処理直後、湿式塗布法にて行
うことを特徴とし、得られる磁気記録媒体は腐蝕
性の環境に長時間保存しても、短波長記録再生を
ドロツプアウトの増加なしに行うことができるも
のでその実用的効果は大きい。[Table] As described above, according to this example, by applying the lubricant after depressurization treatment, the gaps in the columnar structure can be sufficiently covered with the lubricant, providing protection even in high temperature and high humidity environments, especially in the presence of highly corrosive gases. It is possible to mass-produce magnetic recording media with this capability. In this example, the effects were specifically shown for two types of ferromagnetic metal thin film samples, but similar effects were also confirmed for combinations of the other materials mentioned above. Effects of the Invention As described above, the present invention is characterized in that a lubricant layer is formed on a ferromagnetic metal thin film consisting of a columnar structure in which some structural elements are segregated on the surface by a wet coating method immediately after vacuum treatment. The magnetic recording medium obtained can perform short wavelength recording and reproduction without increasing dropout even if stored in a corrosive environment for a long time, and its practical effects are great.
第１図は磁気記録媒体の拡大断面図、第２図は
本発明を実施するために用いた塗布装置の要部構
成図である。
２……基板、３……柱状構造体、４……滑剤、
６……真空槽、７……加熱ローラ、１１……塗布
液。
FIG. 1 is an enlarged sectional view of a magnetic recording medium, and FIG. 2 is a diagram showing the main part of a coating device used to carry out the present invention. 2...Substrate, 3...Columnar structure, 4...Lubricant,
6...Vacuum tank, 7...Heating roller, 11...Coating liquid.
Claims (1)
り成る強磁性金属薄膜上に滑剤層の形成を、減圧
処理直後、湿式塗布法にて行うことを特徴とする
磁気記録媒体の製造方法。1. A method for producing a magnetic recording medium, which comprises forming a lubricant layer on a ferromagnetic metal thin film consisting of a columnar structure in which some of the constituent elements are segregated on the surface by a wet coating method immediately after a reduced pressure treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6875884A JPS60211634A (en) | 1984-04-05 | 1984-04-05 | Manufacture of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6875884A JPS60211634A (en) | 1984-04-05 | 1984-04-05 | Manufacture of magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60211634A JPS60211634A (en) | 1985-10-24 |
| JPH0518176B2 true JPH0518176B2 (en) | 1993-03-11 |
Family
ID=13382967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6875884A Granted JPS60211634A (en) | 1984-04-05 | 1984-04-05 | Manufacture of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60211634A (en) |
-
1984
- 1984-04-05 JP JP6875884A patent/JPS60211634A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60211634A (en) | 1985-10-24 |
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