JPH01312066A - Manufacturing equipment for thin continuous film medium - Google Patents

Abstract

PURPOSE:To prevent wrinkles from occurring to a magnetic film by providing projecting parts to a guide roll and a winding roll, respectively, in the positions facing the inside of a film-formed part on a film at the time of allowing a thin magnetic film to adhere to a long-size polymer film on a can system. CONSTITUTION:A long-size polymer film 2 conveyed from a feed roll 1 is fed via a guide roll 3 to a can 4 to undergo the formation of a thin continuous magnetic film 10 and then wound up via a guide roll 3' by means of a winding roll 5. At this time, projecting parts 11 are provided to the guide roll 3' and the winding roll 5, respectively, in the positions opposed to the inside of the thin continuous magnetic film 10 formed on the film 2. Further, the height and width of the stepped part 9 of the above projecting part 11 are properly selected according to the kind and thickness of the film 2 and also the kind and thickness of the thin magnetic film. By this method, the magnetic film 10 extremely reduced in the frequency of the occurrence of 'wrinkles' can be formed.

Description

[Detailed description of the invention] − [Industrial application field] The present invention relates to an apparatus for manufacturing continuous magnetic media.

In recent years, with the demand for higher density magnetic recording, research into so-called continuous magnetic media in which the magnetic layer is formed only of magnetic materials has become active.

Continuous magnetic media created by vacuum evaporation method, suction method, plating method, etc. have a continuous thin magnetic layer, so longitudinal recording is a matter of course, and the perpendicular recording method has a dramatic improvement in recording density. Due to the high expectations, development of applications for various product forms such as various magnetic tapes and disk-shaped magnetic recording media is underway.

[Conventional technology]

A conventional continuous thin film media manufacturing apparatus is shown in FIG.

The base film 2 conveyed from the feed roll 1 is
It passes through guide roll 3 and is sent to can 4. Therefore,
After a magnetic thin film is formed by a vacuum evaporation method, a sputtering method, an ion blating method, etc., it is sent to the winding roll 5 again via the guide roll 3' and taken up once. 6 is a mask, and 7 is an evaporation source.

[Problem to be solved by the invention]

Here, as shown in FIG. 2, "wrinkles" 8 often occurred from the guide roll 3' to the take-up roll 5.

Media with such "wrinkles" generate large spacing losses and significantly reduce durability, making them practically unusable and posing a major obstacle to improving productivity.

Therefore, an object of the present invention is to provide a continuous thin film magnetic medium manufacturing apparatus that is less likely to cause wrinkles and has high productivity.

[Failure to solve the problem]

According to the present invention, in an apparatus for producing a continuous thin film magnetic medium by attaching a magnetic thin film to a long polymer film by a can method, a convex portion facing the inside of a film forming portion on the polymer film is provided. There is obtained an apparatus for manufacturing a continuous thin film medium, characterized in that it includes a guide roll and a take-up roll.

〔Example〕

Referring to FIG. 1 in addition to FIG. 6, a manufacturing apparatus according to an embodiment of the present invention is illustrated as a guide roll 3'.

A continuous magnetic thin film 10 formed on a base film 2 and having a convex portion 11 facing inside is used. This convex portion 11 forms a step 9. Note that it is preferable to provide a similar convex portion 11 on the winding roll 5 as well.

Hereinafter, some specific examples will be given and explained.

Concrete Example 1 In Fig. 2, sputtering is performed on a base film 2 made of polyimide with a width of 500 [mm] using a can as shown in Fig. 6! l) A 0.2 μm thick CoCr film was formed with a width of 400 (+nm+).

At this time, a protrusion 11 is provided on each of the guide roll 3' and the take-up roll 5 to create a step. The position C)0 of the step was varied by 0 to 100 [ml], and the frequency of occurrence of "wrinkles" was measured when continuous magnetic thin film media each having a length of 1000 [m] were produced.

The step difference at this time is 1 width 10 [mm:], height 0.2
elm:]. The results are shown in FIG. According to Figure 3.

In fact, the step does not cover the base film.

When X = O [mm], the frequency of occurrence of "wrinkles" is reduced when a one step difference is used, and furthermore, when the step is on the inner side of the continuous magnetic thin film, the frequency of "wrinkles" is drastically reduced.

Specific example 2 FIG. 4 shows another specific example of the present invention.

Composition and film thickness of base film 2 and magnetic thin film.

Manufacturing conditions The width and height of one level difference are the same as in Example 1, but the position of the level difference of the fid roll 3' and the winding roll 5 is fixed at a position 50 degrees from the edge of the base film 2,
The width (Y) of the magnetic thin film was varied, and the width was 0 to 100 ml from the edge of the base film.

In this state, when continuous magnetic thin films each having a length of 1000 cm were produced, the frequency of occurrence of "wrinkles" was measured.

The results are shown in FIG. As can be seen from FIG. 5, as in Example 1, it is not yet clear whether the one step difference is due to the magnetic thin film, but where the magnetic thin film was formed, the rigidity increased accordingly and the one step difference was formed. This is thought to be because the tension in the width direction to the medium was effectively transmitted.

Note that in this example, the height and width of the step consisting of the convex portion are determined by the type and thickness of the base film, the type of magnetic thin film,
It may be arbitrarily selected depending on the thickness and is not limited to this embodiment.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably obtain a continuous magnetic thin film medium with very low occurrence of "wrinkles".

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the relationship between Idolol and the base film used in a manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the first specific example, and FIG. A graph showing the frequency of occurrence of "wrinkles" in the first specific example, FIG. 4 is an explanatory diagram showing the second specific example, and FIG. 5 is a graph showing the frequency of occurrence of "wrinkles" in the second specific example. , FIG. 6 is a block diagram showing a schematic configuration of the entire manufacturing apparatus, and FIG. 7 is a perspective view of only the main parts showing how wrinkles occur in the conventional manufacturing apparatus. 1... Output sheet roll, 2... Base film, 3
゜3'...-11 Idroll, 4...Can, 5.
... Winding roll, 6... Mask, 7... Evaporation source, 8... Wrinkle, 9... Step, 10... Continuous magnetic thin film, 11... Convex portion.

Claims (1)

[Claims] 1. In an apparatus for producing a continuous thin film magnetic medium by attaching a magnetic thin film to a long polymer film by a can method, a guide roll having a convex portion facing inside a film forming portion on the polymer film; An apparatus for manufacturing a continuous thin film medium, comprising a take-up roll.