JPS5843060Y2 - Magnetic disk polishing equipment - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a magnetic disk polishing device.

In recent years, as the recording density of magnetic disk devices has increased, the flying height of the magnetic head relative to the magnetic disk has tended to decrease.

Therefore, if there is a protrusion on the surface of the magnetic disk, the head will collide with the protrusion, damaging the core of the head and causing deterioration of characteristics such as a drop in read voltage. Therefore, it is necessary to polish the surface of the magnetic disk to make it smooth. There is a need.

Conventionally, magnetic disk polishing has been carried out by first polishing the disk surface with an abrasive tape, and then moving a hard slider made of alumina ceramic or the like over the disk at a low flying height to remove protrusions protruding from the disk surface. It was getting worse.

However, when this method is used, it not only takes a long time to polish, but also has the disadvantage that all the protrusions on the disk cannot be sufficiently removed.

Therefore, the present invention removes protrusions protruding from the disk surface by installing a plurality of hard balls in a removable manner on a retainer supported by an appropriate support means and rolling the plurality of hard balls on a magnetic disk. It is an object of the present invention to provide a magnetic disk polishing apparatus configured to obtain the above-described problems, thereby eliminating the above-mentioned drawbacks.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

As shown in FIG. 1, the polishing apparatus 1 has a carriage 2 supported by wheels 2a2a', and the carriage 2 is provided with a rod-shaped arm 3.

A holder 5 having a generally cylindrical shape is fixed to the tip of the arm 3, and a retainer 6 is removably fitted into the holder 5, as shown in FIG. Five hard balls 1 arranged at equal pitches are supported so as to be freely transferable.

On the other hand, the magnetic disk 9 has a substrate 9a that is entirely disk-shaped, and magnetic films 9b and 9b' made of a magnetic material are formed on the top and bottom surfaces of the substrate 9a in the figure.

Since the present invention has the above configuration, the polishing device 1
When polishing the magnetic disk 9 using a polishing tape, the surface of the disk 9, that is, the magnetic films 9b and 9b' is polished immediately with the polishing tape.

Then, the surfaces of the magnetic films 9b and 9b' are as shown in FIGS. 3 and 4.
As shown in the figure, although the film is smooth to some extent, particles of alumina, zirconia, etc. contained in the magnetic material protrude from the film surface, forming a large number of protrusions 9c.

Next, the retainer 6 of the polishing device 1 is removed from the holder 5 together with the hard balls 7, immersed in a lubricant applied to the magnetic disk 9, and then attached to the holder 5 again.

Next, as shown in FIGS. 1 and 2, the polishing device 1 is
The hard ball 7 is placed in contact with the magnetic film 9b of the disk 9.

In this state, the disk 9 is rotated in the direction of arrow A in FIG.

As the disk 9 rotates, the hard balls 7 also rotate in the retainer 6.

When the hard ball T rotates, the hard ball 7 hits the magnetic film 9b of the disk 9.
As the hard ball γ rolls on the protrusions 9c, the large number of protrusions 9c that were protruding from the surface of the magnetic film 9b at the moment, as shown in FIG. As shown in FIG.
As shown in the figure, the surface is extremely smooth compared to the roughness after tape polishing in Figure 4.

Polishing is performed over the entire surface of the magnetic film 9b of the disk 9 by appropriately moving the carriage 2 in the directions of arrows C and D in FIG. 2, and then turning the disk 9 over and polishing the magnetic film 9b'.
Do the same for the sides.

Furthermore, since the hard balls 7 rotate smoothly relative to the retainer 6 due to the action of the lubricant, the magnetic films 9b and 9b' will not be damaged due to malfunction in the rotation of the hard balls 7. Even if the lubricant adheres to the magnetic films 9b, 9b', there is no problem because the same lubricant is applied to the magnetic films 9b, 9b' after polishing.

As explained above, according to the present invention, the magnetic disk 9
The hard ball γ rolls on the surface of the magnetic films 9b and 9b',
Since the protrusion 9c protruding from the disk surface can be pushed into the inner surface of the disk 9, that is, toward the substrate 9a, the magnetic films 9b, 9b
It becomes possible to almost completely remove protrusions on the surface of '.

Further, since the polishing is as simple as rolling the hard ball 7 on the magnetic film 9b99b', the polishing work does not take much time and can be done efficiently in a short time.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic disk polishing apparatus according to the present invention, FIG. 2 is a front sectional view showing the main parts of the polishing apparatus shown in FIG. 1, and FIG. 3 is a magnetic disk after tape polishing. 4 is a chart showing the surface roughness of the magnetic disk after tape polishing, and FIG. 5 is an enlarged view showing the state of the magnetic disk after polishing using the polishing device according to the present invention. The sectional view and FIG. 6 are charts showing the surface roughness of the magnetic disk after polishing using the polishing apparatus according to the present invention. 1... Polishing device, 2... Supporting means (carriage),
3... Supporting means (arm), 5... Supporting means (holder), 6... Retainer 7... Hard ball, 9... Magnetic disk, 9c... Protrusion.

Claims (1)

[Scope of utility model registration request] A plurality of hard balls are movably provided on a retainer supported by an appropriate support means, and by rolling the plurality of hard balls on a magnetic disk, protrusions protruding from the disk surface can be removed. A magnetic disk polishing device featuring: