JPH0612644A - Finishing method of slider surface of magnetic head and core slider thereof - Google Patents

Abstract

PURPOSE:To prevent damage of a medium by finishing the surface with a similar medium to the medium provided on a magnetic disk device, when the slider surface is finally finished. CONSTITUTION:A core slider 1 is fixed to a fixing table 8 via a load arm 7 which is a supporting spring to support the core slider 1 on a magnetic recording medium 6, when the slider surface is finished. The magnetic recording medium 6 is provided with a magnetic film 10, a carbon film 11 and a lubricating film 12 on a substrate 9 consisting of Al, etc., and the medium 6 is the similar product to the magnetic recording medium which is mounted on the magnetic disk device. When the slider surface 3 is finished, the core slider 1 is supported on the medium 6 in a state that a constant load similar to the load at the device mounting time is applied, and then the medium 6 is rotated at the circumferential speed <=1.0m/s and the slider surface 3 and the medium 6 are worked in a continuous sliding state for about five seconds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for finally finishing a slider surface of a magnetic head for recording and reproducing an electric signal on a magnetic recording medium in a magnetic disk device.

[0002]

2. Description of the Related Art FIG. 1 is a diagram showing a core slider of a magnetic head for recording and reproducing an electric signal on a magnetic recording medium in a magnetic disk device.

The core slider 1 of the magnetic head has a taper 2 in the inflow direction of the air flow in order to levitate using the air flow generated when the magnetic recording medium rotates.
The airflow entering from the taper 2 enters two rails (slider surfaces) 3 facing the magnetic recording medium to generate a positive air pressure to levitate the core slider. A center track 4 is provided at the center of the core slider 1, and an R / W gap 5 for recording / reproducing electric signals is provided at the rear end of the center track 4. A small air gap is generated between the magnetic recording medium and the R / W gap 5 by the positive air pressure, and the electric signal can be recorded / reproduced in the R / W gap 5.

When the core slider 1 is installed in a disk device, the core slider 1 is installed in a state in which the magnetic recording medium is stopped. Therefore, at this time, the slider surface 3 and the magnetic recording medium have to slide in contact with each other. . .

If there are protrusions or burrs on the slider surface 3 due to processing or the like, the surface of the medium will be damaged and the magnetic film will be scratched, and an area in which recording / reproduction of electric signals is impossible will be made. Further, even if the magnetic film is not scratched, if the surface of the medium is damaged, that portion damages the R / W gap portion 5 of the core slider 1 to deteriorate the recording / reproducing characteristics. Therefore, it is necessary to finish the slider surface 3 with high precision so that there is no protrusion or burr.

[0006]

The core slider processing step includes a dimensioning step for cutting out the slider end portion and the center track end portion in order to determine the slider width and the track width. At this time, there are problems that the slider end portion and the center track end portion are bulged due to the cutting of the cutting tool, and burrs are generated due to the sharpness of the cutting tool.

A technical object of the present invention is to remove the protrusions in a short time without changing the shape of the core slider surface with respect to such a problem of the slider surface.

[0008]

FIG. 2 is a diagram for explaining the basic principle of a slider surface finishing method according to the present invention.
FIG. 3A is a plan view showing a state where a slider surface finishing method is performed. The core slider 1 to be slider surface finished is mounted via a load arm (support spring) 7 for supporting it on the magnetic recording medium 6. It is attached to the table 8. (B) is a cross-sectional view of the magnetic recording medium. As shown here, in the medium, a substrate 9 made of aluminum or the like is provided with a magnetic film 10, a carbon film 11, a lubricating film 12, and the like. This medium 6 is the same as the magnetic recording medium mounted in the magnetic disk device.

When the slider surface is finished, the core slider 1 is supported on the medium 6 under a constant load similar to that when the apparatus is mounted, and then the medium 6 is rotated at a peripheral speed of 1.0 m / min.
The slider surface 3 and the medium 6 are processed in a continuous sliding state for about 5 seconds while being rotated at s or less.

[0010]

FIG. 3A is an enlarged view of the core slider having the protrusion 13 on the slider surface 3. When this core slider is supported on the medium and continuously slid by the method according to the present invention, sharp protrusion heads and burrs (micro protrusions) can be removed very reliably as shown in FIG. 3 (b). . The medium used here is the same as the medium mounted in the magnetic disk device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 is a block diagram of a finishing apparatus using the slider surface finishing method of the present invention.

The magnetic head 15 is attached to the mounting base 8 on the feeding mechanism 14, and the magnetic head 15 is attached to the medium 6 by the feeding mechanism 14.
The magnetic head 15 is supported on the medium 6 by using a load-off bar 16 capable of feeding the magnetic head 15 on and off the medium 6 on and off. The low rotation gear motor 18 whose rotation time is set by the peripheral speed and the timer 17 is rotated in the designated rotation direction to perform continuous sliding finish. However, in the present embodiment, the set time is set to 5.0 seconds, but it is important to adjust the set time (sliding distance) in advance depending on the state of the slider surface shape due to the difference in the processing steps of the core slider.

FIG. 5 shows changes in the shape of the slider surface before and after finishing according to the present invention. The horizontal axis represents the slider width direction, and the right side of the figure represents the slider end portion. The vertical axis represents the height of the protrusion, and the height "0" represents the slider surface. (A) shows before execution and (b) shows after execution. In this way, the protrusion at the slider end portion which is about 50 nm before execution is completely removed by sliding finishing. Therefore, with the slider surface finish of the present invention,
It is possible to solve the problem of medium damage when incorporating a magnetic head.

[0014]

According to the slider surface finishing method of the present invention, since the same magnetic recording medium as that used in the magnetic disk device is used, the core slider is magnetic in the same state as when the signal is recorded / reproduced when the device is mounted. Since the recording medium is processed in contact with the recording medium, the protruding portions such as the outer periphery and the corners of the slider surface, which are easily contacted when the magnetic disk device is mounted, are previously contacted and polished.

As a result, it is possible to solve the problems of the medium damage in the radial direction of the magnetic recording medium when the magnetic head is incorporated in the magnetic disk device and the medium damage due to CSS etc. which occurs during the operation of the device.

[Brief description of drawings]

FIG. 1 is a perspective view of a core slider of a magnetic head mounted on a magnetic disk device.

FIG. 2 is a basic principle diagram of a slider surface finishing method.

FIG. 3 is an enlarged view of a core slider.

FIG. 4 is a configuration diagram of a finishing device using a slider surface finishing method.

FIG. 5 is a diagram showing a change in slider surface shape before and after finishing.

[Explanation of symbols]

 1 ... Core slider, 2 ... Taper, 3 ... Slider surface, 4 ... Center track, 5 ... R / W gap, 6 ... Magnetic recording medium, 7 ... Load arm (supporting spring), 8 ... Mounting base, 9 ... Substrate, 10 ... Magnetic film, 11 ... Carbon film, 12 ... Lubrication film, 13 ... Protrusion, 14 ... Feed mechanism, 15 ... Magnetic head, 16 ... Load-off bar, 17 ... Timer, 18 ... Low rotation gear motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidehiro Sakurai 2880 Kozu, Odawara City, Kanagawa Hitachi Ltd. Odawara Factory

Claims (3)

[Claims] 1. A slider surface finishing method for a magnetic head for a magnetic disk device for recording / reproducing an electric signal on / from a magnetic recording medium, which is mounted on a magnetic disk device when the slider surface is finally finished. A slider surface finishing method for a magnetic head, characterized in that the surface is finished with the same medium as the medium. 2. A slider surface finishing method for a magnetic head according to claim 1, wherein the flying surface between the slider surface and the magnetic recording medium is continuously slid within 50 nm. 3. A core slider, characterized by being processed according to claim 1 or 2.