JPS6029925A - Vertical magnetic recording medium - Google Patents

Abstract

PURPOSE:To obtain a medium having a good surface characteristic and high elasticity by forming a soft magnetic film such as a ''Permalloy'' film or the like on a high polymer film and forming a vertical magnetized film such as an alloy film composed of cobalt and chromium or the like on the soft magnetic film. CONSTITUTION:A material such as aluminum, stainless steel, phosphor bronze, glass, ceramic or the like is used for an inorg. base plate 4. A high polymer film 3 consisting of a polyimide resin, silicone resin, polyamide resin, etc. is formed on the plate 4. A soft magnetic film 2 consisting of ''Permalloy'', Co amorphous, Fe-B amorphous, etc. is formed thereon and further a vertical magnetized film 1 consisting of Co-Ca, etc. is formed thereon. Since the vertical magnetic recording medium has elasticity, the contact between a main pole 5 and the film 1 is stable, recording of the signal is exact and reproduction sensitivity is good.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a perpendicular magnetic recording medium in which information is recorded by magnetizing the film in a direction perpendicular to the film surface of the ÷a property. One that has improved durability as well as being able to bulge! 1!゛Relating to direct magnetic recording media. .

3, B Figures 1 and 2 are 1-section views of the conventional -Xlζ direct magnetic recording medium. In FIG. 1, rH magnetic j[42 is formed on a polymer film substrate 3 made of polyimide, polyethylene terephthalate, etc., and furthermore, lIc]II:lI' is formed)] 49 records formed in this way are difficult to form on the film substrate 3 without curls or cranks, and have poor elasticity. There is a problem that the surface on which the magnetic head runs is easily deformed or scratched.Also, in Fig. 2,
A t:ti IJ disk is shown in which a soft magnetic film 2 is entirely formed on an aluminum substrate 4, and a perpendicular magnetization film 1 is further formed thereon. In the recording medium formed in this way, the bimagnetic group formed thereon does not have the desired physical properties due to the stress caused by the crystal 'f'l+7 structure of the substrate 4. For example, the soft magnetic 1j4i42 ( j' has physical properties such as anisotropy, magnetic permeability, and coercive force;
I was tired. Furthermore, since the surface properties of this one-dimensional medium are determined by the surface properties of the aluminum substrate 4 used, there is a problem that 4v) i:, l are incorrect.

SUMMARY OF THE INVENTION The object of the present invention is to provide a vehicle that does not have the drawbacks of the prior art example of the first paralysis 12.

In order to achieve this purpose, the present invention provides an inorganic substance), 1
．． A polymer 1i'ti 'e shadow is formed on the plate, and a soft resin such as permalloy Ilconij is formed on the polymer film.
At the same time, the soft magnetic property 11! In Hoech, perpendicular magnetization j1-th C type h9 L of alloy film of cobalt and chromium, etc.
This is considered to be a -LF4f characteristic.

Next, an example of the present invention is shown with Figs. 3 to 5.
C.Explain.

Figure 3 shows a first embodiment of a recording medium such as a rigid disk according to the present invention. This is a second embodiment of a perpendicular magnetic recording medium such as a floppy disk or a perpendicularly magnetized DESO, in which a magnetic film is provided on the magnetic film, and FIG. 5 is a principle diagram showing the perpendicularly magnetized reproducing method.

i4! , 3 to 5, the same reference numerals are used for the same parts.

The seven-material substrate 4 includes aluminum, stainless steel,
Materials such as phosphorus #η, 11, glass, and ceramic are used. A polymer film 3 made of polyimide resin, silicon resin, polyamide resin, etc. is formed on the inorganic substance group &4. Further, after forming a soft magnetic film 2 of Pamalloy, Co-based amorphous, Fe--B-based amorphous, etc., a perpendicularly magnetized film 1 of Co--Ca, etc. is further formed thereon.

For example, when configuring a perpendicular magnetic recording medium as a rigid disk, a polyimide resin, which is a polymer If resin, is dropped in a point shape onto an 8-inch diameter aluminum substrate 4 with a thickness of 2 mrn, and the groups &4 are formed. The resin is applied to the substrate surface by centrifugal force by high speed rotation, cross-sectional spin code is applied to form the polymer resin film 3, and the resin film 3 is thermally cured at a processing temperature of 500°C. At this time, the resin film thickness varies from 0.05 μm to several tens of J1. It can be freely formed to a thickness of m IJ degrees. In addition, by forming the 4+d Jlii LM in this way, pinholes and unevenness on the substrate can be eliminated, and the flat surface of the board can be heated up to max.
``'' 0.05 μm, which is extremely good.

Furthermore, on top of: the Co content is 85 iii iii
%, Hf content is 5% by weight, Nb content is 10% by weight f+i: g6] (using a J inch alloy target, 'FIL interpolar distance 6.0y+, Ar gas pressure 5 x 1
High frequency electric power of 500 at 0” torr
An amorphous high magnetic permeability thin layer, ie, a soft magnetic film 2, is formed to a thickness of 0.5 μm under W6 conditions. Then further C
Using a 10-inch alloy target with an O content of 82% by weight and a Cr content of 18% by weight, a perpendicular magnetic recording medium was formed by forming a film with a thickness of 0.21IIn under the same conditions. It will be done.

Furthermore, if the perpendicular magnetic recording medium is in the form of a whole roll (for example, a thickness of ■ μnl, a width of 500 m,
On a rolled phosphor bronze substrate 4 with a length of 100 m, a polyamide thread resin made of Hang-sei was applied by a roll method, and then dried at a high temperature.
After L, perform °calendering and make the surface flat f1°
On line 113, three resin films are formed. Then, using in-line sputtering equipment and large-scale evaporation equipment,
4. Form a magnetic film 2 and a perpendicular magnetization film 1 to form a perpendicular (iM
form a recording medium.

The perpendicular magnetic recording M'J body formed at +1° 1 in this way has no curls or cracks, and has excellent surface properties.Jil: 1b-h)C-//)5! l-1/
-x Jl"s tl> sr / -4j sl -
1' Ln)IWmWm resistance can be brought out.

Furthermore, as will be described later in connection with FIG. It will be a long one.

FIG. 5 shows principle 1 of the perpendicular magnetization reproducing method. Since the perpendicular magnetic recording medium has elasticity, the contact between the main magnetic pole 5 and the perpendicular magnetization film l is stable, and signals can be recorded accurately. At the same time, the playback sensitivity is good. In addition, the soft magnetic layer 2 is in contact with the perpendicular magnetization JQ; The magnetic circuit on the surface of the 9541fl 41M can be partially closed as shown in the figure, and the recording, process and U' I
In the J raw process, the demagnetizing field at the tip of the main pole of a single pole head is reduced in the soft magnetic layer, and the main pole's i (
13f ''+'j: can be prevented from decreasing.

As explained above, 'Ii'r, straight 4i according to the present invention:
'<Qiyun i,;.

Since the medium is composed of surface 'I! LIJ” Ju
In addition to being an IJ-, it is also highly elastic, so the hend k) or the conspiracy itself is damaged.
It has the effect of making it harder for Lee Mi to beat J4/1 in the 4th race.

Furthermore, the platform formed as this perpendicular magnetic recording medium Kefloppy disk has an auxiliary magnetic pole excitation of 4M HV.
It is also possible to use a perpendicular recording head.

[Brief explanation of drawings]

1 and 2 are partial cross-sectional views of a conventional manual storage medium, respectively. -4 ゛Puff -nee゛ゝ-・ -1 □
3 is a partial sectional view showing the first embodiment of the perpendicular magnetic recording medium according to the present invention, and FIG. 4 is a partial cross-sectional view showing the first embodiment of the perpendicular magnetic recording medium according to the present invention. The partial cross-sectional view shown in FIG. ...Polymer 4MJ lipid film, 4...
・Inorganic material substrate, 5... Main magnetic pole. jI1 Figure 3E Figure 5 Figure 2 '84114 Vri effect

Claims (1)

[Claims] A polymer 111J'r is formed on an inorganic substance substrate, a soft medical film such as permalloy 1j1 (such as Permalloy 1j1) is formed on the polymer lp, and an alloy film of cobalt and chromium is formed on the soft magnetic film. All features of forming a 41F perpendicular magnetization film and 1
A vertical recording medium.