JPH0231327A - Method and apparatus for producing magnetic disk medium - Google Patents
Method and apparatus for producing magnetic disk mediumInfo
- Publication number
- JPH0231327A JPH0231327A JP18241988A JP18241988A JPH0231327A JP H0231327 A JPH0231327 A JP H0231327A JP 18241988 A JP18241988 A JP 18241988A JP 18241988 A JP18241988 A JP 18241988A JP H0231327 A JPH0231327 A JP H0231327A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- disk substrate
- magnetic field
- substrate
- magnetic disk
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 144
- 238000000034 method Methods 0.000 title description 7
- 239000000758 substrate Substances 0.000 claims abstract description 67
- 239000003973 paint Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 abstract description 23
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 230000005389 magnetism Effects 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
各種情報を記録するのに広く使用される磁気ディスク媒
体の製造方法に関し、
回転している磁気ディスク基板の磁性膜両面より磁界を
与えて磁性粉をディスク基板の表面に吸着させ、その吸
着により遠心力にブレーキをかけて磁気塗料中の磁性粉
密度を保持して高品位な磁性膜を形成することを目的と
し、
（１）回転している磁気ディスク基板の一方から該磁気
ディスク基板を貫通する方向の磁界を与え、他方から該
磁気ディスク基板の回転方向に磁界を与えながら磁気塗
料を両面同時塗布する。[Detailed Description of the Invention] [Summary] This relates to a method for manufacturing magnetic disk media widely used to record various types of information, in which a magnetic field is applied from both sides of the magnetic film of a rotating magnetic disk substrate to cause magnetic powder to be transferred to the disk. The purpose is to form a high-quality magnetic film by adhering to the surface of a substrate and applying a brake to centrifugal force through the adsorption to maintain the magnetic powder density in the magnetic paint. (1) A rotating magnetic disk. A magnetic paint is simultaneously applied to both surfaces while applying a magnetic field in a direction penetrating the magnetic disk substrate from one side of the substrate and applying a magnetic field in the rotational direction of the magnetic disk substrate from the other side.
（２）回転している上記磁気ディスク基板の両面に磁気
塗料を噴射するノズルと、該磁気ディスク基板を貫通す
る方向の磁界を与える第一磁界部材と、該磁気ディスク
基板の回転方向に磁界を与えるように構成した第二磁界
部材を備え、該第一磁界部材を該ディスク基板の一方の
面と一定間隔で対向するように配設し、該第二磁界部材
を該第一磁界部材に対して該磁気ディスク基板の回転方
向側で、該磁気ディスク基板の他方の面と一定間隔で対
向するように構成する。(2) a nozzle that sprays magnetic paint onto both sides of the rotating magnetic disk substrate; a first magnetic field member that applies a magnetic field in a direction that penetrates the magnetic disk substrate; and a first magnetic field member that applies a magnetic field in the direction of rotation of the magnetic disk substrate; the first magnetic field member is arranged to face one surface of the disk substrate at a constant interval, and the second magnetic field member is configured to and is configured to face the other surface of the magnetic disk substrate at a constant interval on the rotation direction side of the magnetic disk substrate.
本発明は、各種情報を記録するのに広く使用される磁気
ディスク媒体の製造方法に関する。The present invention relates to a method of manufacturing a magnetic disk medium that is widely used to record various types of information.
最近、磁気ディスク媒体は記録の高密度化要求に伴って
薄い磁気塗料の膜（以下磁性膜と略称する）を形成する
必要が生じ、その薄膜形成をポリッシュ加工等の機械的
によることは技術的に困難であるため、強磁性体粉末（
以下磁性粉と略称する）を樹脂バイダー中に分散させた
磁気塗料の粘度を低下、磁気塗料のシンナー組成を高沸
点化、または、スピンコード時の回転数を上げる等の方
法でドーナツ状のアルミニュウム基板に磁気塗料を片面
づつ塗布し、その塗布面の反対側より磁性粉を磁気吸引
して磁性膜を形成している。Recently, with the demand for higher recording density on magnetic disk media, it has become necessary to form a thin film of magnetic paint (hereinafter referred to as magnetic film), and it is technically difficult to form this thin film mechanically, such as by polishing. ferromagnetic powder (
By reducing the viscosity of a magnetic paint made by dispersing magnetic powder (hereinafter referred to as magnetic powder) in a resin binder, by increasing the boiling point of the thinner composition of the magnetic paint, or by increasing the rotational speed during spin cording, it is possible to create donut-shaped aluminum. Magnetic coating is applied to one side of the substrate, and magnetic powder is magnetically attracted from the opposite side of the coating to form a magnetic film.
しかし、アルミニュウム基板の両面に磁気塗料を同時塗
布して磁性膜を形成すると、磁性粉がスピンコード時の
遠心力により円周縁の方に逃げるので、塗布した磁気塗
料の磁性粉を拘束して分布が均一となる新しい磁気ディ
スク媒体の製造方法が要求されている。However, when magnetic paint is simultaneously applied to both sides of an aluminum substrate to form a magnetic film, the magnetic powder escapes toward the circumferential edge due to the centrifugal force during the spin cord, so the magnetic powder of the applied magnetic paint is restrained and distributed. There is a need for a new method for manufacturing magnetic disk media that provides uniformity.
従来広く使用されている磁気ディスク媒体の製造方法は
、第４図に示すようにドーナツ状のアルミニエウムより
なる磁気ディスク基板１ （以下ディスク基板と略称す
る）を例えば矢印方向に回転するように装着し、そのデ
ィスク基板１の中心孔１−１近辺に磁気塗料を噴射する
ノズル３を対向するように設けて、ディスク基板１を貫
通する方向（以下縦方向と略称する）の磁界を与える電
磁石４を、装着したディスク基板１の一方の面と一定間
隔１例えば約５龍離れた位置で対向するように配設して
いる。As shown in FIG. 4, a conventionally widely used manufacturing method for magnetic disk media involves mounting a doughnut-shaped magnetic disk substrate 1 (hereinafter abbreviated as disk substrate) made of aluminum so as to rotate, for example, in the direction of the arrow. , an electromagnet 4 is provided in the vicinity of the center hole 1-1 of the disk substrate 1 so as to face a nozzle 3 for spraying magnetic paint, and provides a magnetic field in a direction penetrating the disk substrate 1 (hereinafter referred to as the vertical direction). , are arranged so as to face one surface of the mounted disk substrate 1 at a constant distance of 1, for example, about 5 yen.
そして、（１）ディスク基板１を数１１００ｒｐで１例
えば矢印方向に回転させるとともに、電磁石４に電流を
流してディスク基板１の表面に対し垂直方向の磁界を発
生させ、
（２）磁性粉２−１を樹脂バイダー中に分散させてその
粘度を低下させた磁気塗料、または、シンナー組成を高
沸点化して乾燥スピードを早めた磁気塗料を、対向する
ノズル３より吐出してディスク基板ｌの表裏全面に磁気
塗料を０．５〜１．０μｍとごく薄い膜厚に塗布する。Then, (1) the disk substrate 1 is rotated at several 1100 rpm, for example in the direction of the arrow, and a current is applied to the electromagnet 4 to generate a magnetic field perpendicular to the surface of the disk substrate 1; (2) the magnetic powder 2- 1 is dispersed in a resin binder to reduce its viscosity, or a magnetic paint whose drying speed is accelerated by increasing the boiling point of the thinner composition is discharged from opposing nozzles 3 to coat the entire front and back surfaces of the disk substrate l. Apply magnetic paint to a very thin film thickness of 0.5 to 1.0 μm.
（３）磁性膜２の膜厚が定まったならば、磁性粉２−１
の結晶方向を同心円方向に揃えるため、図示していない
磁場配向処理を施し塗布を完了する。(3) Once the thickness of the magnetic film 2 is determined, the magnetic powder 2-1
In order to align the crystal orientation in the concentric direction, a magnetic field orientation treatment (not shown) is applied to complete the coating.
（４）これ以降熱処理、表面仕上げ、潤滑処理等を経て
媒体を完成させている。(4) After this, the medium is completed through heat treatment, surface finishing, lubrication treatment, etc.
以上説明した従来の製造方法で問題となるのは、第５図
に示すようにディスク基板１の両面に磁気塗料を同時塗
布した一方の面に電磁石４を設置して、その塗布した磁
性膜に縦方向の磁界を与えると磁性粉２−１は電磁石４
の方向、即ち矢印Ｂ方向に吸引される。そのため、電磁
石４と反対側の磁性粉２−１はディスク基板１の表面に
吸着し、それにより磁性粉２−１は矢印Ｅ方向の遠心力
に対してブレーキがかかるが、電磁石４と対向する面倒
は磁性粉２−１が基板１面より引離される方向に磁力が
働くのでブレーキ力が半減し、遠心力により磁性粉２−
１がディスク基板１の外周縁に集まって密度が反対面と
比較して２０〜３０％減少するので、ビットエラー数や
電磁変換特性でかなり劣った磁性膜２になるという問題
が生じている。The problem with the conventional manufacturing method described above is that, as shown in FIG. When a vertical magnetic field is applied, the magnetic powder 2-1 becomes an electromagnet 4
, that is, in the direction of arrow B. Therefore, the magnetic powder 2-1 on the opposite side of the electromagnet 4 is attracted to the surface of the disk substrate 1, and as a result, the magnetic powder 2-1 is braked against the centrifugal force in the direction of the arrow E, but the magnetic powder 2-1 faces the electromagnet 4. The problem is that the magnetic force acts in the direction in which the magnetic powder 2-1 is pulled away from the surface of the substrate, so the braking force is halved, and the centrifugal force causes the magnetic powder 2-1 to separate from the surface of the substrate.
1 gathers on the outer periphery of the disk substrate 1 and the density is reduced by 20 to 30% compared to the opposite surface, resulting in a problem that the magnetic film 2 has a considerably inferior number of bit errors and electromagnetic conversion characteristics.
本発明は上記のような問題点に鑑み、回転しているディ
スク基板の磁性膜両面より磁界を与えてディスク基板の
表面に吸着させ、その吸着により遠心力にブレーキをか
けて磁気塗料中の磁性粉密度を保持することにより、高
品位な磁性膜が形成できる新しい磁気ディスク媒体製造
方法の提供を目的とする。In view of the above-mentioned problems, the present invention applies a magnetic field from both sides of the magnetic film of a rotating disk substrate to make it stick to the surface of the disk substrate, and this adsorption brakes the centrifugal force to reduce the magnetism in the magnetic paint. The purpose of the present invention is to provide a new method for manufacturing a magnetic disk medium that can form a high-quality magnetic film by maintaining powder density.
本発明は、第１図に示すようにディスク基板１の中心孔
１−１近辺で対向するノズル３から磁気塗料を噴射して
、回転しているディスク基板１の遠心力により両面に磁
気塗料の膜を形成して、そのディスク基板１の一方の面
と一定間隔で対向する第一磁界部材、即ち電磁石４によ
り縦方向の磁界を与え、ディスク基板１の他方の面倒で
その面に対し一定間隔まで近接できるように配設された
、板厚方向の両面が磁極Ｎ、Ｓの永久磁石１５−１を一
定間隔で磁性が相対的に逆となるように組み立てられた
第二磁界部材１５により、ディスク基板１の回転方向（
以下横方向と略称する）の磁界を与えるとともにディス
ク基板１の回転数をｕｐすることにより薄い磁性膜２が
形成される
〔作 用〕
本発明では、第３図に示すように縦方向に磁界を与える
第一磁界部材、即ち電磁石４をディスク基板１の一方９
例えば矢印Ｂ側に設け、横方向の磁界を与える第二磁界
部材１５を他方、即ち矢印Ｃ側に配設して一定間隔に近
付けることにより、回転するディスク基板１の両面に塗
布した磁性膜２中の磁性粉２−１は電磁石４により矢印
Ｂ方向に吸引され、電磁石４の反対側となる磁性膜２中
の磁性粉２−１はディスク基板１の表面に吸着し、電磁
石４と対向する側の磁性粉２−１は磁性膜２中で浮遊し
た状態となる。そして、伽方向にディスク基板１が回転
して第二磁界部材１５の所に達すると、第二磁界部材１
５例の塗布面は横方向の磁力が強いため、反対面側より
！磁石４の縦方向磁界で引付けられた磁性粉２〜１を再
び引離すような悪い作用もせず、また裏側に対しては、
第二磁界部材１５の両端で発生する縦方向の磁力により
強力に引き付けるため、両面とも均一で高密度、高品質
な磁性膜を形成することが可能となる。As shown in FIG. 1, the present invention sprays magnetic paint from nozzles 3 facing each other near the center hole 1-1 of a disk substrate 1, and applies the magnetic paint to both surfaces by the centrifugal force of the rotating disk substrate 1. A vertical magnetic field is applied by a first magnetic field member, that is, an electromagnet 4 facing one surface of the disk substrate 1 at a constant distance, and a magnetic field is applied to the other side of the disk substrate 1 at a constant distance from that surface. The second magnetic field member 15 is constructed by assembling permanent magnets 15-1 with magnetic poles N and S on both sides in the plate thickness direction at regular intervals so that the magnetism is relatively opposite. The rotation direction of the disk substrate 1 (
A thin magnetic film 2 is formed by applying a magnetic field in the horizontal direction (hereinafter abbreviated as "horizontal direction") and increasing the rotational speed of the disk substrate 1. [Operation] In the present invention, as shown in FIG. A first magnetic field member, that is, an electromagnet 4 that gives
For example, by disposing the second magnetic field member 15 on the arrow B side and applying a horizontal magnetic field on the other side, that is, on the arrow C side, and placing them close to each other at a constant interval, the magnetic film 2 applied to both surfaces of the rotating disk substrate 1 The magnetic powder 2-1 inside is attracted in the direction of arrow B by the electromagnet 4, and the magnetic powder 2-1 in the magnetic film 2 on the opposite side of the electromagnet 4 is attracted to the surface of the disk substrate 1 and faces the electromagnet 4. The magnetic powder 2-1 on the side becomes suspended in the magnetic film 2. Then, when the disk substrate 1 rotates in the direction and reaches the second magnetic field member 15, the second magnetic field member 1
The applied side in Example 5 has a strong horizontal magnetic force, so the opposite side! It does not have a bad effect of separating the magnetic powders 2 to 1 attracted by the vertical magnetic field of the magnet 4, and does not have a negative effect on the back side.
Since it is strongly attracted by the longitudinal magnetic force generated at both ends of the second magnetic field member 15, it is possible to form a uniform, high-density, and high-quality magnetic film on both sides.
以下第１図および第３図について本発明の詳細な説明す
る。The present invention will be described in detail below with reference to FIGS. 1 and 3.
第１図は本実施例による磁気ディスク媒体製造方法の模
式図、第２図は本実施例による第二磁界部材を示す拡大
斜視図、第３図は作用を説明する展開図を示し、図中に
おいて、第４図と同一部材には同一記号が付しであるが
、その他の１５はディスク基板１の回転方向（以下横方
向と略称する）の磁界を与える第二磁界部材である。FIG. 1 is a schematic diagram of the magnetic disk medium manufacturing method according to the present embodiment, FIG. 2 is an enlarged perspective view showing the second magnetic field member according to the present embodiment, and FIG. 3 is a developed view for explaining the operation. 4, the same members as in FIG. 4 are given the same symbols, and the other 15 is a second magnetic field member that provides a magnetic field in the rotational direction (hereinafter abbreviated as lateral direction) of the disk substrate 1.
第二磁界部材１５は、一定の幅９例えば約１０ｍ幅を有
する非磁性の間隔材１５−２を介して、磁極ＮＳが板厚
方向の両面側となるように矢印りおよび矢印Ｄ゛方向着
磁した２本の永久磁石１５−１を、−定間隔２例えば約
１０Ｂ幅を有する非磁性の間隔材１５−２を介してそれ
ぞれの磁性が相対的に逆となるように組み立てたもので
ある。The second magnetic field member 15 is oriented in the direction of arrow D and the direction of arrow D so that the magnetic poles NS are on both sides in the plate thickness direction via a non-magnetic spacer 15-2 having a constant width 9, for example, about 10 m width. Two magnetized permanent magnets 15-1 are assembled with a non-magnetic spacing member 15-2 having a constant spacing 2, for example, a width of about 10B, so that their magnetisms are relatively opposite to each other. .
上記部材を使用した磁気ディスク媒体の製造装置は、磁
気塗料を噴射するノズル３を、例えば矢印方向に回転す
るように装着したディスク基板工の中心孔１−１近辺で
対向するように設けて、縦方向の磁界を与える第一磁界
部材、即ち電磁石４をディスク基板工の一方の面と一定
開隔で対向するように配設した従来と同一の装置に、上
記第二磁界部材１５を電磁石４に対してディスク基板１
の回転方向側で、ディスク基板１の他方の表面と一定の
間隔、即ちディスク基板１を挟んで反対側の。An apparatus for manufacturing a magnetic disk medium using the above-mentioned member is provided with nozzles 3 for spraying magnetic paint so as to face each other near the center hole 1-1 of a disk substrate machine mounted so as to rotate, for example, in the direction of the arrow. The second magnetic field member 15 is attached to the electromagnet 4 in the same device as in the prior art, in which the first magnetic field member, that is, the electromagnet 4, which provides a vertical magnetic field is disposed so as to face one surface of the disk substrate at a constant distance. against disk substrate 1
on the side in the rotational direction and at a constant distance from the other surface of the disk substrate 1, that is, on the opposite side with the disk substrate 1 in between.
例えば６０鶴の間隔で対向させ、図示していない駆動手
段により矢印Ａ方向に移動して、ディスク基板１の表面
に対し約５ｆｉまで近接するように構成されている。For example, they are arranged to face each other at an interval of 60 mm, and are moved in the direction of arrow A by a driving means (not shown) so as to approach the surface of the disk substrate 1 by about 5 fi.
上記装置を使用した磁気ディスク媒体の製造方法は、第
１図に示すように、
（１）第二磁界部材１５をディスク基板１の表面に対し
て５０ｆ１以上引離した状態で、そのディスク基板１を
１例えば矢印方向に数１１００ｒｐで回転させ、電磁石
４に電流を流して縦方向の磁界を発生させる。As shown in FIG. 1, the method for manufacturing a magnetic disk medium using the above-mentioned apparatus is as follows: (1) With the second magnetic field member 15 separated from the surface of the disk substrate 1 by 50 f1 or more, the disk substrate 1 is 1 is rotated, for example, at several 1100 rpm in the direction of the arrow, and a current is passed through the electromagnet 4 to generate a longitudinal magnetic field.
（２）対向するノズル３より磁気塗料を吐出してディス
ク基板１の表裏全面に塗布する。(2) Magnetic paint is discharged from the opposing nozzles 3 and applied to the entire front and back surfaces of the disk substrate 1.
（３）塗料吐出を止めると同時に、図示していない駆動
手段により第二磁界部材１５を矢印Ａ方向に移動して、
ディスク基板１の表面に対し約５鶴まで近付け、ディス
ク基板１の回転数を約２倍程度にｕｐして磁性膜２を０
．５〜１．０μｍとごく薄い膜厚にする。(3) At the same time as stopping the paint discharge, the second magnetic field member 15 is moved in the direction of arrow A by a driving means (not shown),
The disk substrate 1 is brought close to the surface of the disk substrate 1 by about 50 degrees, and the rotational speed of the disk substrate 1 is increased to about twice that, so that the magnetic film 2 is heated to zero.
．． The film thickness should be extremely thin, 5 to 1.0 μm.
（４）磁性膜２の膜圧が定まったならば、以降従来と同
じように磁場配向処理を施して、熱処理、表面仕上げ、
潤滑処理等により磁気ディスク媒体を完成している。(4) Once the film thickness of the magnetic film 2 has been determined, magnetic field orientation treatment is performed in the same manner as before, heat treatment, surface finishing,
The magnetic disk medium is completed by lubrication treatment, etc.
その結果、塗布された磁性膜２内の磁性粉２−１は、第
３図に示すような矢印Ｂ方向と矢印Ｃ方向の作用を受け
てディスク基板１の表面に保持されるために、薄い塗布
厚を得るために塗料粘度を低下させたり、シンナー組成
を高沸点化しても塗布時の遠心力で逃げることなく均一
な磁性膜２を両面同時に形成することができる。それに
より、高密度記録が可能になってビットエラーを減少す
ることができ、また、再生出力レベル向上が計れるとと
もに、表裏の再生出力差が著しく減少する等電磁変換特
性が向上した磁気ディスク媒体を形成することができる
。As a result, the magnetic powder 2-1 in the applied magnetic film 2 is held on the surface of the disk substrate 1 under the action of arrows B and C as shown in FIG. Even if the paint viscosity is lowered or the thinner composition is made to have a higher boiling point in order to obtain a coating thickness, a uniform magnetic film 2 can be simultaneously formed on both sides without escaping due to centrifugal force during coating. This enables high-density recording, reduces bit errors, improves the playback output level, and creates magnetic disk media with improved electromagnetic conversion characteristics, such as a marked reduction in the difference in playback output between the front and back sides. can be formed.
尚、両面より横方向の磁界を与えると縦方向をほとんど
打消し合ってしまうので磁性粉２−１の保持が難しくな
る。It should be noted that if a horizontal magnetic field is applied from both sides, the magnetic fields in the vertical direction will almost cancel each other out, making it difficult to hold the magnetic powder 2-1.
以上の説明から明らかなように本発明によれば極めて簡
単な方法で磁性膜のビットエラーが減少して高密度記録
が可能になり、且つ、同一膜厚での再生出力レベル向上
および表裏の再生出力差が減少して電磁変換特性の向上
環の利点があり、著信頼性向上の効果が期待できる磁気
ディスク媒体の製造方法を提供することができる。As is clear from the above explanation, according to the present invention, bit errors in the magnetic film can be reduced using an extremely simple method, making high-density recording possible, and the reproduction output level can be improved with the same film thickness and reproduction on both sides can be achieved. It is possible to provide a method for manufacturing a magnetic disk medium, which has the advantage of reducing the output difference and improving electromagnetic characteristics, and can be expected to have the effect of significantly improving reliability.
第１図は本発明の一実施例による磁気ディスク媒体製造
装置を示す模式図、
第２図は本実施例による第二磁界部材を示す拡大斜視図
、
第３図は作用を説明する展開図、
第４図は従来の磁気ディスク媒体の製造方法を示す斜視
図、
第５図は問題点を示す断面図である。
図において、
１は基板、
１−１は中心孔、
２は磁性膜、
２−１は磁性粉、
３はノズル、
４は電磁石、
１５は第二磁界部材、
１５−１は永久磁石、
１５−２は間隔材、
を示す。
イ茗ＦｆＩ なｔ梵明１）ｌ（帛Ｇコ
第３図
第
図
ｒａｓ＝、ｉｔ末ｔ＊ｔｉｍ
第５図FIG. 1 is a schematic diagram showing a magnetic disk medium manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing a second magnetic field member according to the present embodiment, and FIG. 3 is a developed view illustrating the operation. FIG. 4 is a perspective view showing a conventional method of manufacturing a magnetic disk medium, and FIG. 5 is a sectional view showing problems. In the figure, 1 is a substrate, 1-1 is a center hole, 2 is a magnetic film, 2-1 is a magnetic powder, 3 is a nozzle, 4 is an electromagnet, 15 is a second magnetic field member, 15-1 is a permanent magnet, 15- 2 indicates the spacing material. ImeiFfI natBanmei1)l(帛GcoFig.3Fig.ras=,itendt*tim Fig.5
Claims (2)
該磁気ディスク基板（１）を貫通する方向の磁界を与え
、他方から該磁気ディスク基板（１）の回転方向に磁界
を与えながら磁気塗料を両面同時塗布してなることを特
徴とする磁気ディスク媒体の製造方法(1) A magnetic field is applied from one side of the rotating magnetic disk substrate (1) in a direction penetrating the magnetic disk substrate (1), and a magnetic field is applied from the other side in the direction of rotation of the magnetic disk substrate (1). A method for producing a magnetic disk medium characterized by simultaneously applying paint on both sides.
に磁気塗料を噴射するノズル（３）と、該磁気ディスク
基板（１）を貫通する方向の磁界を与える第一磁界部材
（４）と、 該磁気ディスク基板（１）の回転方向に磁界を与えるよ
うに構成した第二磁界部材（１５）を備え、該第一磁界
部材（４）を該ディスク基板（１）の一方の面と一定間
隔で対向するように配設し、該第二磁界部材（１５）を
該第一磁界部材（４）に対して該磁気ディスク基板（１
）の回転方向側で、該磁気ディスク基板（１）の他方の
面と一定間隔で対向するように構成されてなることを特
徴とする磁気ディスク媒体の製造装置。(2) A nozzle (3) that sprays magnetic paint onto both sides of the rotating magnetic disk substrate (1), and a first magnetic field member (4) that applies a magnetic field in a direction that penetrates the magnetic disk substrate (1). and a second magnetic field member (15) configured to apply a magnetic field in the rotational direction of the magnetic disk substrate (1), the first magnetic field member (4) being connected to one surface of the disk substrate (1). The second magnetic field member (15) is arranged to face the first magnetic field member (4) at a constant interval, and the magnetic disk substrate (1
1. An apparatus for manufacturing a magnetic disk medium, characterized in that the device is configured to face the other surface of the magnetic disk substrate (1) at a constant interval on the rotation direction side of the magnetic disk substrate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18241988A JPH0231327A (en) | 1988-07-20 | 1988-07-20 | Method and apparatus for producing magnetic disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18241988A JPH0231327A (en) | 1988-07-20 | 1988-07-20 | Method and apparatus for producing magnetic disk medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0231327A true JPH0231327A (en) | 1990-02-01 |
| JPH0348573B2 JPH0348573B2 (en) | 1991-07-24 |
Family
ID=16117956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18241988A Granted JPH0231327A (en) | 1988-07-20 | 1988-07-20 | Method and apparatus for producing magnetic disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0231327A (en) |
-
1988
- 1988-07-20 JP JP18241988A patent/JPH0231327A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0348573B2 (en) | 1991-07-24 |
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