JPS5996529A - Magnetic recording medium - Google Patents

Abstract

PURPOSE:To obtain a magnetic recording medium having high durability and a long life by laminating respectively an elastic material layer, the 2nd substrate, and a magnetic layer consisting of a ferromagnetic metal on the 1st substrate. CONSTITUTION:A metal such as aluminum or a polymer film such as polyester or the like having about 20mu-3mm. thickness is used for the 1st substrate, butadiene or styrene synthetic rubber having about 5mu-200mu for an elastic material layer 2 and a heat-resistant polymer film such as polyester having about 4mu- 40mu thickness for the 2nd substrate 3. A magnetic layer 4 is formed by sticking a ferromagnetic metal such as iron or cobalt by a vacuum deposition or ion plating method. A protective film 5 consists of polyester, polyimide, etc. having about serveral 1/10mu thickness. If a magnetic head or the like is brought into contact with the medium constituted in such a way under specified pressure, the layer 2 is laminated in the midway and therefore the force to be exerted on the layer 5 is decreased and the damage thereof is reduced.

Description

[Detailed description of the invention] The present invention relates to magnetic recording media.

■Recently, the magnetic recording density has increased compared to the conventional coating type.
J, which uses a very high vapor deposition type, has become very popular with sea urchins.

Incidentally, a vapor-deposited magnetic recording medium is one in which a ferromagnetic metal is vapor-deposited on a substrate such as a plastic film using vacuum W%, +'3 method, ion blating method, sputtering method, etc., and the magnetic layer is The magnetic layer is extremely thin and has almost no C1 elasticity, so it is easily damaged during use due to air pressure, etc. For this reason, a protective layer is usually provided on the surface of the magnetic layer. However, conventional protective layers generally have poor durability (411) and have a short lifespan.

The present invention aims to improve the above-mentioned drawbacks and provide a magnetic recording medium with high durability (1) and long life.

In order to achieve the object of the present invention, the magnetic 5 (1
an elastic layer d3 on the recording medium and laminated on the first base;
A second base layer laminated on the elastic layer, a magnetic layer made of ferromagnetic metal laminated on the second base body, and a protective layer laminated on the magnetic layer. We provide magnetic recording media with the following characteristics.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

In FIG. 1, 1 is a first substrate (with a thickness of 20 tl).
A polymer film such as metal 1b polyJSAl such as aluminum, polycarbonate 1~, polystyrene, etc. with a thickness of about 3 mn+ is used. Reference numeral 2 denotes an elastic layer Fl laminated on the first substrate 1, which is made of 1-tadiene or styrene synthetic rubber, natural rubber, polyurethane, polyethylene, etc., with a thickness of about 5 to 200 μ. 3 is a second base body laminated on the elastic layer 2, and is made of a particularly heat-resistant polymer film 11 made of polyester or polyimide having a thickness of 4 to 40 μm. 4 is laminated on the second body 3 and 1. : Magnetic layer, formed by depositing ferromagnetic metal such as iron, cobalt, nickel, etc. by vacuum evaporation method, ion plating method, or sputtering method (=J). 5 is a protective layer laminated on the magnetic layer 4. It is a layer made of polyvarnish, polyimide, etc. with a thickness of about 1/10 μm.

Since the present invention has the above-mentioned configuration, when a magnetic head or the like comes into contact with a certain pressure during use, since the bullet 1 and the body 2 are laminated in the middle, the protective layer 5 C1 protection I that the hanging force of the horn is reduced and the damage to the protective layer 5 is reduced.
Increased durability of P5, magnetic 811 record! Lifespan increases as 1I11 rest 6.

FIG. 2 shows a third embodiment of the present invention. In particular, elastic layers 12 and 13 are laminated on both sides of a first base 11, and a second base 14 is attached to each elastic layer 12 and 13. and 15
? In addition, magnetic layers 16 and 17 are laminated on the second substrates 11 and 15, and protective layers 1B and 19 are laminated on the magnetic layers 1G and 17. Since the elastic layers 12 and 13 absorb the pressure points applied to the layers 18 and 19, the durability of the protection 119V18 and 19 is improved and the life span is increased.

In addition, in the second embodiment, l13 and the corner 1st layer'-
For example, magnetic 1! t) in F layer
If a protective substance is mixed in, it is always good to have l (-) laminated and Z and C.

As described above, according to the present invention, the elastic layer is #Ij on the base body.
One gram of magnetic recording media with a long life and high durability can reduce the stress applied to the protective layer on the surface.

[Brief explanation of drawings]

FIG. 1 shows a sectional view of an embodiment of the invention, and FIG. 2 shows a sectional view of another embodiment of the invention. 1.1゛1...First base body, 2.12.13...Elastic body layer 3.14.15...Second base body, 4.1G, 17...Magnetic layer, 5.1ε3.19 ...protective layer. Patent Applicant: Japan X1'7-] Ndenri Co., Ltd. Figure 1

Claims (1)

[Claims] (1) Magnetism with ferromagnetic metal deposited on the base; 1L!
A5 η on the recording medium, an elastic layer laminated on the first rest,
A magnetic H11 recording medium characterized in that a second base layer is laminated on the elastic layer, and a magnetic layer made of a ferromagnetic metal is layered on the second layer.