JPS61258376A - Polishing device for magnetic head - Google Patents

Abstract

PURPOSE:To attain a polishing process with high efficiency in a constant radius state of high accuracy by giving the radius polishing to the corner of contact face of a magnetic head against a magnetic recording medium with a contact secured to a lapping tape so that the coincidence is obtained between the direc tion of the head and the driving direction of the recording medium. CONSTITUTION:A lapping tape 3 is set between guide rolls 1 and 2 engaged with each other through their recess and projection parts. Thus the tape 3 is deformed into the shapes of both rolls 1 and 2. The recess/projection forms of rolls 1 and 2 is approximate or equal to the radius shape of the contact face of a magnetic head against a recording medium which requires the processing. Thus the apexes of the recess/projection parts of the polishing sur face of the deformed tape 3 have no contact with the part of the head requiring no processing. Then the magnetic head is fixed to a tool 5 and has a slight touch to the tape 3 so that the coincidence is secured between the head direction and the driving direction of the recording medium. Thus the head is polished in an radius shape. In this case, the polishing time is set by a timer. Then the tape 3 is moved up after polishing to secure a fixed radius state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for polishing a radiused corner of a magnetic recording medium abutting surface of a floating magnetic head.

[41 Features of the Invention] The present invention provides an R-shaped polishing device for the corner portion of the magnetic recording medium abutting surface of a floating magnetic head. The wrapping tape is deformed and runs between special guide rollers, so that it matches the direction of media travel relative to the magnetic head.
The R-shaped polished metal can be processed with high accuracy and efficiency by coming into contact with the lapping tape.

[Conventional technology]

Floating magnetic heads are used in hard disk drives, and there are three types of floating magnetic heads: a monolithic type, a composite type, and a thin film head. A commonly used method is the contact start/stop method (OS
When the magnetic recording medium is stationary, the magnetic head is
The magnetic head is in contact with the medium, but when the medium rotates and reaches a certain rotation speed, the magnetic head rotates several millimeters! The system is such that the yAI floats up and records and plays.

Unlike floppy disk drives, hard disk drives require high reliability because there is no need to replace the medium. One factor that reduces drive reliability is "scratches" on the medium caused by contact between the magnetic head and the medium. One of the causes of these scratches is that the corners of the surface of the magnetic head that come into contact with the medium are sharp.To completely prevent scratches, the corners of the surface of the magnetic head that come into contact with the medium must be polished into a round shape. There is a need to.

Conventional R-shape grinding has been done by manually shaping the corner with a wrapping sheet, or by boring it into a corner S.

[Problems and Objectives to be Solved by the Invention] However, in the above-mentioned prior art, Kanri Tokiyami has no choice but to rely on "Kan", and the number of spoilers is not constant. For this reason, the variations in ski cities become large, resulting in problems such as classification of ski cities and the need to re-wrap the media contacting surface.

Therefore, the present invention is intended to solve these conventional problems, and its purpose is to provide a gtt' that can ensure a shape with less variation in the ski city at a certain time 11J.
It is located in a place that provides.

[Means for solving problems]

In the magnetic head polishing apparatus of the present invention, in polishing a corner radius of a magnetic recording medium contacting surface of a flying magnetic head, a pair of upper and lower special guides are fixed to the entire magnetic head jig and provided on the left and right sides of the magnetic head. Wrapping tape between the rollers? The entire feature is that the wrapping tape is processed by being brought into contact with the wrapping tape so that the wrapping tape is moved in a deformed manner so as to match the direction in which the medium travels with respect to the magnetic head.

[Effect]

According to the above configuration of the present invention, by passing the wrapping tape between the pair of upper and lower specially shaped guide rollers provided on both the left and right sides of the magnetic head, the chive shape is deformed into the shape of the guide roller, and The magnetic head is positioned parallel to the tape, the tape and the magnetic head are in slight contact with each other, and the lapping tape is run to perform R-shaped polishing.

〔Example〕

FIG. 1 is a sectional view of a guide roller of a magnetic head polishing apparatus according to an embodiment of the present invention. Deform into the shape of said guide roller 1.2.

The uneven shape of the guide roller 1.2 is made to approximate or match the R shape of the magnetic head medium contact surface which requires processing, and the apex of the concave and convex parts of the polished surface of the deformed tape is the magnetic head, which is not processed. The shape should be such that it does not touch the necessary parts.

As shown in FIG. 2, the pair of upper and lower guide rollers are positioned as short as possible on both sides of the magnetic head, and the wrapping tape is run between the left and right upper and lower guide rollers.

The magnetic head is fixed to a jig 5, brought into slight contact with the wrapping tape 3 so as to match the direction of medium travel relative to the magnetic head, as shown in FIG. 1, and polished into an R shape. In this case, by setting the polishing time using a timer and raising the wrapping tape after polishing, a constant R state can be ensured.

Also, take care to ensure that the back tension of the lapping chip 1 is sufficient and that the lapping tape does not sag even during high-speed polishing.

The medium contact surface roughness of the floating magnetic head is Rmaxo, 0
8 or less, R-shaped polishing is also an extension of this, and the wrapping tape should have a grain size of 1000 to 15000, and the surface roughness should be about the same as the surface roughness of the medium contacting surface.

As mentioned in [Prior Technology] that there are three types of floating magnetic heads, each type has a different material and shape of the media contacting surface, so a specially shaped guide roller suitable for each shape is used to increase the speed of the wrapping tape. make it possible to change the
Polishing conditions suitable for three types of heads can be created by combining the lapping table grain size and polishing time.

〔Effect of the invention〕

As described above, according to the invention, the wrapping tape is completely run between the specially shaped upper and lower guide rollers on both the left and right sides of the magnetic head, and the corner R of the magnetic recording medium contact surface of the magnetic head is
By processing the rubbing table in contact with the rubbing table so as to coincide with the direction in which the medium travels with respect to the t6B head, there is an effect that processing can be performed with a constant R state (high precision) and with high efficiency.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a guide roller of the magnetic head polishing device of the present invention. FIG. 2 is a sectional view of the magnetic head polishing apparatus of the present invention. 1... Guide roller (top) 2... Guide roller (bottom) 3... Wrapping tape 4... Magnetic head 5... Magnetic Head fixing jig. that's all

Claims (1)

[Claims] In the R-shape polishing of the corner of the magnetic recording medium contact surface of a floating magnetic head, the magnetic head is fixed to a jig and a wrapping tape is deformed and run between a pair of upper and lower special guide rollers provided on the left and right sides of the magnetic head. A polishing device for a magnetic head, characterized in that the polishing device contacts and processes the wrapping tape so that the wrapping tape matches the direction in which the medium travels with respect to the magnetic head.