JPS58218040A - Producing device of magnetic recording medium - Google Patents

Abstract

PURPOSE:To enable the easy control in the thickness of a lubricating layer by having a high frequency coil coated with a polymer material of low polymn. on the surface. CONSTITUTION:A ferromagnetic metallic layer of iron, cobalt, nickel or the like is beforehand stuck on a substrate 5 diagonally at the prescribed incident angle to the normal of said substrate, whereby a magnetic material layer 6 is formed. More specifically, when electric current is supplied from a high frequency power source 3 to a high frequency coil 2, a polymer material 4 of low polymn. coated on the high frequency coil evaporates and sticks on the surface of the layer 6 provided on the substrate 5, thereby forming a lubricating layer. Since the amt. of the material 4 coated on the high frequency coil 2 can be determined beforehand to a prescribed value, the thickness of the lubricating layer formed on the substrate 5 is easily controllable. The sticking of the polymer material is much improved by connecting the substrate to the earth or connecting a biasing power source to the substrate to bais the same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a magnetic recording medium with an improved method of forming a lubricating layer. □Magnetic recording media, in which a ferromagnetic metal is obliquely attached to a substrate such as plastic or film, have superior coercive force, squareness ratio, magnetic recording density, etc. compared to conventional coated media, and have recently been put into practical use. It's starting to look like this.

By the way, when this magnetic recording medium is used as a magnetic tape or the like, the surface is easily damaged because it is rubbed by magnetism, etc. To prevent this, a lubricating layer with lubricating properties is coated on the surface of the magnetic layer or It is provided on the surface of the substrate opposite to the magnetic layer.

Metals and metal oxides form this lubricating layer.

Vacuum deposition method, ion blating method, etc. for polymer substances, etc.
Although it adheres to a predetermined surface by sputtering or the like, it has the disadvantage that it is difficult to control its thickness.

SUMMARY OF THE INVENTION The present invention aims to improve two or more drawbacks and provide an apparatus for manufacturing a magnetic recording medium in which the thickness of the lubricating layer can be easily controlled.

The present invention provides a substrate to achieve the above objects.

A magnetic recording medium manufacturing apparatus in which a lubricating layer made of a polymeric substance is provided directly or indirectly by a high-frequency ion bracing knob is characterized by having a high-frequency coil coated on one surface with a low-polymerized polymeric substance. The present invention provides an apparatus for manufacturing a magnetic recording medium.

An embodiment of the present invention will be described below based on the drawings.

In the figure, 1 is a cylindrical vacuum device, with a 1°
It is maintained at a vacuum level of about rr. Reference numeral 2 denotes a high frequency coil disposed within the vacuum device 1, and is connected to a high frequency power source 3 outside the vacuum device 1.

The high frequency coil 2 is coated with a low polymerization polymer material 4. The polymer substance 4 is polytetrafluoroethylene, polyvinylene 7onide.

Fluorinated compounds such as hexafugu-boupylene polyimide, polyvinylidene heptadide, polyethylene, polyvinyl chloride, etc. are used. Reference numeral 5 denotes a strip-shaped substrate such as a plastic film, on which a ferromagnetic metal such as iron, cobalt, nickel, etc. is applied in advance at a predetermined angle of incidence with respect to the normal to the substrate 50, and a magnetic layer 6 is formed. is formed, ・ru. j
′ ≧ In other words, when current is supplied to the high-frequency coil 2 from the high-frequency power source 5, the high-frequency coil 2 is coached in: (The low-polymerized polymer material 4 evaporated and the magnetic material provided on the base 5 It adheres to the surface of the body layer 60 to form a lubricating layer.At this time, since the amount of the polymer substance 4 coated on the high frequency coil 2 can be determined in advance to a predetermined value, The thickness of the lubricating layer can be easily controlled.

In addition, it is better to load a bias by connecting the base to ground or by connecting a bias power supply.

Adhesion of polymeric substances can be further improved.

Alternatively, an evaporation source containing ferromagnetic metal may be placed below the high-frequency coil (the formation of the magnetic layer and the lubricant layer are performed in one vacuum device). be able to.

In the above embodiments, the lubricating layer was provided on the surface of the magnetic layer, but the lubricating layer may be provided directly on the opposite side of the base from the magnetic layer.

As described above, according to the present invention, there can be obtained an apparatus for manufacturing a magnetic recording medium in which the thickness of the lubricating layer can be easily controlled.
“・

[Brief explanation of drawings]

The figure shows a front sectional view of a voice embodiment of the invention. 1... Vacuum device, 2... High frequency coil. 3... High frequency power source, 4... Low polymerization polymer material, 5... Substrate, 6... Magnetic layer.

Claims (1)

[Claims] 11) In an apparatus for manufacturing a magnetic recording medium, in which a lubricating layer made of a polymeric substance is directly or indirectly provided on a substrate by high-frequency ion blating. 1. An apparatus for manufacturing a magnetic recording medium, comprising a high-frequency coil whose surface is coated with a low-polymerization polymer substance.