JPH0132174Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for manufacturing a magnetic recording medium that can perform oblique deposition.

Magnetic recording media used in audio, VTR, magnetic disks, etc. are made by coating a ferromagnetic metal such as cobalt with an organic binder on a base such as a plastic film. Magnetic recording media deposited obliquely at a predetermined angle of incidence from the normal have come into use. A magnetic recording medium produced by oblique deposition has advantages such as a very high recording density and the possibility of miniaturization.

By the way, in order to obliquely vapor deposit a ferromagnetic metal onto a substrate, as shown in FIG. 1, the metal 2 is vapor-deposited onto the substrate 3 at a portion that contacts the back roller 1 and is cooled. Therefore, there was a drawback that there was a large amount of metal 2 that was not deposited on the substrate 3, and in particular, the larger the incident angle, the greater the loss.

The object of the present invention is to provide an apparatus for manufacturing a magnetic recording medium that can improve the above-mentioned drawbacks and reduce the loss of ferromagnetic metal attached to a substrate.

In order to achieve the above-mentioned purpose, the present invention uses a manufacturing device for magnetic recording media in which ferromagnetic metal can be attached diagonally, by guiding a strip material that serves as a base and cooling the ferromagnetic metal attached to the strip material. A magnetic cross crawler capable of moving the cross roller is disposed such that the center line of the cross crawler maintains a predetermined angle with respect to the horizontal line, and an evaporation source is disposed directly below the cross crawler horizontally in the width direction of the cross crawler. The present invention provides a recording medium manufacturing device.

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

11 is a cylindrical vacuum deposition tank, a part of which is shaped like a protrusion 12, and is connected to a vacuum exhaust system (not shown) to maintain the inside of the vacuum deposition tank 11 at a predetermined degree of vacuum. ing. 13 is a supply roller capable of supplying a strip material 14 such as a plastic film. Reference numeral 15 denotes a winding roller for winding up the strip material 14 supplied from the supply roller 13. 16
is a cross roller that guides the strip material 14 and is capable of cooling and fixing metal attached to the strip material 14, and is arranged so that its center line maintains a predetermined angle θ with respect to the horizontal line. . Guide rollers 17 and 18 are provided solely for guiding the strip material 14. Reference numeral 19 denotes an evaporation source capable of accommodating and melting a ferromagnetic metal 20 such as cobalt, and is a semi-cylindrical crucible made of titanium, carbide, etc., which is horizontally arranged directly below the bucket roller 16.

That is, the ferromagnetic metal 20 from the evaporation source 19 is obliquely deposited on the strip material 14 at a position where it contacts the back roller 16 . The angle during this vapor deposition can be arbitrarily set by the angle θ between the center line of the back roller 16 and the horizontal line, and is usually preferably set to 40 degrees or more in order to obtain a high coercive force.
Since the ferromagnetic metal 20 of the evaporation source 19 evaporates from directly below the vacuum roller 16, it adheres to the strip material 14 with almost no loss.

In each of the above embodiments, the ferromagnetic metal is attached to the strip by vacuum deposition, but it may be attached by other methods such as ion plating.

As described above, according to the present invention, not only a magnetic recording medium having a ferromagnetic layer with high coercive force can be obtained, but also a magnetic recording medium that can improve the adhesion loss of ferromagnetic metal to the strip material. A manufacturing device is obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional magnetic recording medium manufacturing apparatus, and FIG. 2 is a sectional view of an embodiment of the present invention. 11... Vacuum deposition tank, 14... Strip material, 16...
...Bath crawler, 19...Evaporation source, 20...Ferromagnetic metal.

Claims (1)

[Claims for Utility Model Registration] (1) In an apparatus for manufacturing a magnetic recording medium capable of depositing a ferromagnetic metal onto a substrate at a predetermined incident angle from the normal to the substrate, A cross crawler capable of cooling the ferromagnetic metal attached to the material is arranged so that the center line of the cross crawler maintains a predetermined angle with respect to the horizontal line, and an evaporation source is placed directly below the cross crawler in the width direction of the cross crawler. A magnetic recording medium manufacturing apparatus characterized by being horizontally arranged. (2) The apparatus for manufacturing a magnetic recording medium according to claim 1, wherein the predetermined angle is 40 degrees or more. (3) An apparatus for manufacturing a magnetic recording medium according to claim 1 or 2 of the utility model registration claim, which comprises a plurality of evaporation sources containing ferromagnetic metal arranged in parallel to the center line of a back crawler. .