JPH0281321A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPH0281321A JPH0281321A JP23330488A JP23330488A JPH0281321A JP H0281321 A JPH0281321 A JP H0281321A JP 23330488 A JP23330488 A JP 23330488A JP 23330488 A JP23330488 A JP 23330488A JP H0281321 A JPH0281321 A JP H0281321A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic layer
- magnetic
- thin film
- recording medium
- magnetic recording
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000010409 thin film Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 2
- 239000010408 film Substances 0.000 abstract description 19
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229920005596 polymer binder Polymers 0.000 abstract description 2
- 239000002491 polymer binding agent Substances 0.000 abstract description 2
- 230000005415 magnetization Effects 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 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）
本発明は、同心円状に磁気配向されたコンピュータの外
部メモリ用磁気ディスクなどの磁気記録媒体の＄ｉｍ方
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a $im method for magnetic recording media, such as magnetic disks for external memory of computers, which are magnetically oriented in concentric circles.
（従来の技術）
従来、コンピュータの外部メモリ用磁気ディスクなどの
円盤状磁気記録媒体は、磁気ヘッドと相対回転運動を行
ない、同心円方向に磁気記録が行なわれている。(Prior Art) Conventionally, a disk-shaped magnetic recording medium such as a magnetic disk for an external memory of a computer performs a relative rotational movement with a magnetic head, and magnetic recording is performed in a concentric direction.
従って、この磁気ディスクの磁性層は、磁気ディスクの
同心円方向に磁気異方性が生じている状態が最も望まし
く、磁性体に針状λ−Ｆ８２０３を用いた場合、同心円
状に針状λ−Ｆｅ２０ａの長軸が向って配列されている
状態が最も良く磁気記録再生ができる。Therefore, it is most desirable for the magnetic layer of this magnetic disk to have magnetic anisotropy in the concentric direction of the magnetic disk, and when acicular λ-F8203 is used as the magnetic material, acicular λ-Fe20a is concentrically formed. Magnetic recording and reproduction is best achieved when the long axes of the two are aligned facing each other.
（発明が解決するための課題）
上述した従来の磁気記録媒体の製造方法で製作された磁
気記録媒体は、同心円方向へ磁性層の磁気容易方向を持
たせることが極めて困難であるため、無配向の磁気記録
媒体を提供するしかないという欠点があった。(Problems to be Solved by the Invention) Magnetic recording media manufactured by the above-described conventional magnetic recording media manufacturing method are non-oriented because it is extremely difficult to make the magnetic layer have a magnetic easy direction in the concentric direction. The drawback was that there was no choice but to provide magnetic recording media.
（課題を解決するための手段）
上述した課題を解決するために、本発明は、基体の一方
の面に導電性Ｉｌｌを形成する工程と、前記基体の他方
の面に磁性層を形成する工程と、前記磁性層が未乾燥状
態のうち、前記導電性薄膜の内外周間に通電しつつ、前
記基体を回転する工程と、
前記磁性層を硬化する工程とを有し、
前記基体の他方の面に形成された前記磁性層を同心円状
に磁気配向して、円盤状磁気記録媒体を製造することを
特徴とする磁気記録媒体の製造方法を提供する。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a step of forming a conductive layer on one surface of a substrate, and a step of forming a magnetic layer on the other surface of the substrate. and rotating the base body while applying electricity between the inner and outer peripheries of the conductive thin film while the magnetic layer is in an undried state; and curing the magnetic layer; A method for manufacturing a magnetic recording medium is provided, which comprises manufacturing a disc-shaped magnetic recording medium by magnetically orienting the magnetic layer formed on a surface concentrically.
（実施例）
本発明になる磁気記録媒体の製造方法は、電流が流れる
とその電流方向に対し右ねじの回転方向に磁場が発生す
るというアンペールの法則を用いたものである。(Example) The method for manufacturing a magnetic recording medium according to the present invention uses Ampere's law, which states that when a current flows, a magnetic field is generated in the rotational direction of a right-handed screw relative to the direction of the current.
以下、本発明になる磁気記録媒体の製造方法につき、図
面に沿って説明する。Hereinafter, a method for manufacturing a magnetic recording medium according to the present invention will be explained with reference to the drawings.
第１図は本発明になる磁気記録媒体の製造方法の第１実
施例により製作された磁気記録媒体の構成図である。FIG. 1 is a block diagram of a magnetic recording medium manufactured by a first embodiment of the method for manufacturing a magnetic recording medium according to the present invention.
同図に示すように、円盤状磁気記録媒体１は、基体２の
一方の而２ａに導電性１１１１！１３を形成すると共に
、基体２の他方の面２ｂに磁性層４を形成して成る。As shown in the figure, the disk-shaped magnetic recording medium 1 includes a conductive layer 1111!13 formed on one side 2a of the base 2, and a magnetic layer 4 formed on the other side 2b of the base 2.
さて、磁気記録媒体１の製造工程は、次の工程（１）〜
■から成る。Now, the manufacturing process of the magnetic recording medium 1 includes the following steps (1) to
Consisting of ■.
（１） 導電性薄膜形成工程
７０μｍ厚のポリエステルベースフィルム（基体）２の
表面（一方の面）２ａの全面に亘り、真空蒸着法でアル
ミニウム（Ａ１）を１μｍ蒸着して金属薄膜（導電性薄
膜）３を形成する。この導電性ｆ１ｇ１３を形成するの
に用いられる物質としては、この他、Ｃｕ、ＡＱの金属
などが上げられる。(1) Conductive thin film formation step Aluminum (A1) is deposited to a thickness of 1 μm over the entire surface (one side) 2a of a 70 μm thick polyester base film (substrate) 2 using a vacuum evaporation method to form a metal thin film (conductive thin film). ) form 3. Other materials used to form the conductive layer f1g13 include metals such as Cu and AQ.
又、その形成方法はスパッタ、イオンブレーティング、
無電界メツキ等のいずれの方法でも良い。In addition, the formation method is sputtering, ion blating,
Any method such as electroless plating may be used.
但し、金属薄膜３の厚みは電気抵抗の厚み依存性を考慮
した上で、必要な厚さに設定する必要がある。However, the thickness of the metal thin film 3 needs to be set to a required thickness, taking into consideration the thickness dependence of electrical resistance.
■ 円盤状基体作成工程
アルミニウムが蒸着されたベースフィルム２を円盤状に
打抜く。■ Disc-shaped substrate creation process The base film 2 on which aluminum is vapor-deposited is punched out into a disc shape.
■ 磁性層形成工程
上記ベースフィルム２の表面（他方の而）２ｂに、λ−
Ｆｅ２０３と高分子バインダで構成された磁性塗料を、
周知の磁気ディスクの磁性層の厚さと同一になるように
塗布して磁性層４を形成する。■ Magnetic layer forming process On the surface (other side) 2b of the base film 2, λ-
A magnetic paint composed of Fe203 and a polymer binder,
The magnetic layer 4 is formed by coating to have the same thickness as the magnetic layer of a known magnetic disk.
（４） 磁性層磁場配向工程
上記（■の工程で塗布された磁性塗料が未乾燥状態のう
ちに、金Ｉ！１１膜３上の内周と外周に、一対の十電極
５．−電極６を接触させつつ、同図中、矢印方向に、ベ
ースフィルム２を回転させる。この結果、電極５．６は
同心円状にベースフィルム２上を走査することになる。(4) Magnetic layer magnetic field orientation step While the magnetic paint applied in the step (■) above is still wet, a pair of ten electrodes 5 and 6 are placed on the inner and outer peripheries of the gold I!11 film 3. The base film 2 is rotated in the direction of the arrow in the figure while making contact with the base film 2. As a result, the electrodes 5.6 concentrically scan the base film 2.
そして、ｍ１ｆｉ５．６間に直流電流１を１０Ａ通電す
る。電流１０通電方向はベースフィルム２の内周から外
周に向う半径方向である。Then, a DC current 1 of 10 A is applied between m1fi5.6. The direction in which the current 10 is applied is the radial direction from the inner circumference to the outer circumference of the base film 2.
ここで、金属薄１１３に印加される直流電流Ｉにより発
生する磁性層４の磁場Ｈの大きさは、距離に反比例する
。本実施例の場合、この距離は基体２の厚みｈとなる。Here, the magnitude of the magnetic field H of the magnetic layer 4 generated by the direct current I applied to the thin metal 113 is inversely proportional to the distance. In the case of this embodiment, this distance is the thickness h of the base 2.
従って、磁［ｉＨはベースフィルム２の厚みｈと直流電
流■の大きさに依存し、ベースフィルム２が薄いほど、
磁性層４に大きな磁場Ｈを発生させて、磁気配向を良好
に行なうことができる。Therefore, the magnetic field [iH] depends on the thickness h of the base film 2 and the magnitude of the DC current ■, and the thinner the base film 2, the more
By generating a large magnetic field H in the magnetic layer 4, good magnetic orientation can be achieved.
（５）カレンダー処理工程
■ 磁性層硬化工程
４０°Ｃの雰囲気中で４８時間放置して硬化反応を行な
わせ、磁性層４を硬化する。(5) Calendar treatment step ■ Magnetic layer hardening step The magnetic layer 4 is hardened by leaving it to stand in an atmosphere at 40° C. for 48 hours to carry out a hardening reaction.
こうして、同心円状に磁気配向された円盤状の磁気記録
媒体１を得ることができる。In this way, a disc-shaped magnetic recording medium 1 with concentric magnetic orientation can be obtained.
さて、この比較例としては、上記した工程（１）〜■の
うち、磁性層磁場配向工程（４）を省いたものである。Now, as this comparative example, among the above-mentioned steps (1) to (2), the magnetic layer magnetic field orientation step (4) was omitted.
この結果、本発明方法により得られた磁気記録媒体は、
次の表に示すように、上記の比較例に較べ、Ｂｍ、Ｒ８
，ＨＣのいずれの値も上回るという優れた配向性を示し
た。As a result, the magnetic recording medium obtained by the method of the present invention is
As shown in the following table, compared to the above comparative example, Bm, R8
, HC, showing excellent orientation.
上記した本発明になる製造工程は、導電性薄膜形成工程
（１）において、ベースフィルム２の一方の面２ａの全
面に亘り、ＩＩ導電性薄膜を形成したものであるが、下
記する第２図に示す製造方法では、導電性薄ｗＡ３を放
射状に形成し、電極の数を増加することによって、磁性
層４の磁場配向を更に、向上させることができる。In the manufacturing process according to the present invention described above, a II conductive thin film is formed over the entire surface of one surface 2a of the base film 2 in the conductive thin film forming step (1). In the manufacturing method shown in , the magnetic field orientation of the magnetic layer 4 can be further improved by forming the conductive thin wA3 radially and increasing the number of electrodes.
第２図は本発明になる磁気記録媒体の製造方法の第２実
施例により製作された磁気記録媒体の部分構成図である
。前述したものと同一構成のものには同一符号を付し、
その説明を省略する。FIG. 2 is a partial configuration diagram of a magnetic recording medium manufactured by a second embodiment of the method for manufacturing a magnetic recording medium according to the present invention. Items with the same configuration as those described above are given the same reference numerals.
The explanation will be omitted.
同図に示すように、円盤状の磁気記録媒体１１は基体２
の一方の面２ａには、基体２の内周から外周に向う放射
状の７４電性薄膜１２が形成されており、薄膜１２は複
数の放射状部分１２８〜１２ｊ・・・から構成される。As shown in the figure, a disc-shaped magnetic recording medium 11 has a base 2.
A 74-electrode thin film 12 is formed on one surface 2a of the substrate 2 in a radial direction from the inner circumference toward the outer circumference, and the thin film 12 is composed of a plurality of radial portions 128 to 12j....
導電性薄ｇ１１２は前述した薄膜３と同様に製作される
が、ここではその説明は省略する。The conductive thin film g112 is manufactured in the same manner as the thin film 3 described above, but its explanation will be omitted here.
さて、磁性層磁場配向工程（４）においては、基体２に
塗布された磁性塗料が未乾燥状態のうちに、金属薄膜１
２を構成する複数の放射状部分１２ａ〜１２ｊ・・・上
の内周と外周に、一対の十電極１３ａ〜１３ｊ・・・
−電極１４ａ〜１４ｊ・・・を接触させつつ、ベースフ
ィルム２を一定方向に回転させる。 この結果、電極１
３ａ〜１３ｊ・・・ −電極１４ａ〜１４ｊ・・・は、
同心円状にベースフィルム２上を走査することになる。Now, in the magnetic layer magnetic field orientation step (4), while the magnetic paint applied to the substrate 2 is still wet, the metal thin film 1 is
A pair of ten electrodes 13a-13j...
- Rotate the base film 2 in a certain direction while bringing the electrodes 14a to 14j into contact with each other. As a result, electrode 1
3a to 13j... -electrodes 14a to 14j... are,
The base film 2 is scanned concentrically.
そして、一対の電極間に直流電流Ｉを１ＯＡ通電する。Then, a DC current I of 1OA is applied between the pair of electrodes.
電流Ｉの通電方向はベースフィルム２の内周から外周に
向う半径方向である。The direction of current I is in the radial direction from the inner circumference to the outer circumference of the base film 2.
こうして、上記した実施例のものに比較して、磁性層４
に、更に大きな磁場Ｈを発生させることができ、磁性層
４の磁気配向を、更に良好に行なうことができる。なお
、上記ｆｆｆ４ｊ１３ａ〜１３ｊ・・・、１４ａ〜１４
ｊ・・・の端面に近接する薄膜には逆起電力が発生する
ことから、電極の大きさは各１＃膜の幅に対し、十分に
大なる幅を有することが必要である。In this way, compared to the above embodiment, the magnetic layer 4
In addition, a larger magnetic field H can be generated, and the magnetic layer 4 can be magnetically aligned more favorably. In addition, the above fff4j13a to 13j..., 14a to 14
Since a back electromotive force is generated in the thin film close to the end face of j..., the size of the electrode needs to be sufficiently larger than the width of each 1# film.
（発明の効果）
上述したように、本発明になる磁気記録媒体の製造方法
は、同心円方向へ磁性層の磁気容易方向を持たせること
ができるので、これにより得た磁気記録媒体を使用する
際の取扱い上の繁雑さを除去できる効果を有する。(Effects of the Invention) As described above, the method for manufacturing a magnetic recording medium according to the present invention allows the magnetic layer to have the magnetic easy direction in the concentric direction, so that when using the magnetic recording medium obtained thereby, This has the effect of eliminating the complexity of handling.
第１図は本発明になる磁気記録媒体の製造方法の第１実
施例により作製された磁気記録媒体の構成図、第２図は
本発明になる磁気記録媒体の製造方法の第２実施例によ
り作製された磁気記録媒体の部分構成図である。
１．１１・・・磁気記録媒体、
２・・・ポリエステルベースフィルム（基体）、２ａ、
２ｂ・・・一方の面、他方の面、３．１２・・・金Ｂ
薄膜（導電性薄膜）、４・・・磁性層、５．６．１３ａ
〜１３ｊ、１４ａ〜１４ｊ・・・電極。
回転乃句
Ａ
第 １ 図
第２図FIG. 1 is a block diagram of a magnetic recording medium manufactured according to a first embodiment of the method for manufacturing a magnetic recording medium according to the present invention, and FIG. FIG. 2 is a partial configuration diagram of a manufactured magnetic recording medium. 1.11... Magnetic recording medium, 2... Polyester base film (substrate), 2a,
2b...One side, the other side, 3.12...Gold B
Thin film (conductive thin film), 4... magnetic layer, 5.6.13a
~13j, 14a~14j...electrodes. Rotating poem A Figure 1 Figure 2
Claims (1)
体の他方の面に磁性層を形成する工程と、前記磁性層が
未乾燥状態のうちに、前記導電性薄膜の内外周間に通電
しつつ、前記基体を回転する工程と、 前記磁性層を硬化する工程とを有し、 前記基体の他方の面に形成された前記磁性層を同心円状
に磁気配向して、円盤状磁気記録媒体を製造することを
特徴とする磁気記録媒体の製造方法。[Scope of Claims] A step of forming a conductive thin film on one surface of the substrate, a step of forming a magnetic layer on the other surface of the substrate, and a step of forming the conductive thin film on one surface of the substrate, while the magnetic layer is in an undried state. rotating the base while applying electricity between the inner and outer peripheries of the thin film; and hardening the magnetic layer, magnetically orienting the magnetic layer formed on the other surface of the base in a concentric manner. 1. A method for manufacturing a magnetic recording medium, comprising manufacturing a disk-shaped magnetic recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23330488A JPH0281321A (en) | 1988-09-16 | 1988-09-16 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23330488A JPH0281321A (en) | 1988-09-16 | 1988-09-16 | Production of magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0281321A true JPH0281321A (en) | 1990-03-22 |
Family
ID=16953020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23330488A Pending JPH0281321A (en) | 1988-09-16 | 1988-09-16 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0281321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5776577A (en) * | 1993-07-29 | 1998-07-07 | Nec Corporation | Magnetic recording disk having a lubicant reservoir on the inner circumferential surface |
-
1988
- 1988-09-16 JP JP23330488A patent/JPH0281321A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5776577A (en) * | 1993-07-29 | 1998-07-07 | Nec Corporation | Magnetic recording disk having a lubicant reservoir on the inner circumferential surface |
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