JP2797708B2 - Manufacturing method of magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnetic head used in a fixed magnetic disk drive.

2. Description of the Related Art In recent years, fixed magnetic disk drives have been showing a tendency to increase in capacity as well as miniaturization, and demands for narrow tracks and narrow tolerances of magnetic heads have been increasing with an increase in recording density.

In the conventional normal processing process, in order to regulate the track width and the floating surface width of the magnetic head, the material is first divided into cranks according to the total height of the magnetic material blocks of the magnetic head material, and the magnetic material blocks of the same rank are separated from the floating surface. To the processing jig, then attach the processing jig to the machine tool, repeat the processing of the air bearing surface of the bonded magnetic block, and remove it from the one with the standard size width All the magnetic blocks are finished to uniform dimensions.

That is, as shown in U.S. Pat. No. 3,982,318 and the drawings, the conventional processing method accurately measures the dimension 17 from the reference surface, which is the bottom surface of FIG. 4, to the apex portion 16 (A), , The C core 20 is bonded to form a closed magnetic path (B), the reference surface (bottom surface) is bonded to a processing jig, the processing jig is mounted on a processing machine, and the magnetic block is processed to obtain a reference surface. Dimensions 18 up to the full height from

At this time, the difference between the dimensions 18 and 17
The dimension 19 from 16 to the tip 15 is the magnetic gap depth.

Problems to be Solved by the Invention However, the above-mentioned conventional method has a problem in the accuracy of the magnetic gap depth as described below.

Of the magnetic gap length and magnetic gap depth, which affect the characteristics of the magnetic head, the magnetic gap length can be measured from the air bearing surface of the magnetic head, but the magnetic gap depth is difficult to measure because it is difficult to measure. In the example, the magnetic gap depth is measured using the bottom surface of the magnetic block as a reference plane, and the subsequent processing is performed. However, the thickness variation of the adhesive layer that adheres to the processing jig is ± 5 μm, and there are also variations in processing dimensions in the post-process. It occurs at the gap depth.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide a method of manufacturing a magnetic head having a constant magnetic gap depth.

Means for Solving the Problems In order to solve the above object, the present invention is to dispose a block having a front gap between a reference base and a processing jig, and provide the reference base with a processing surface on the side serving as a floating surface of the block. The block was fixed to a processing jig in a state in which the block was brought into contact, and then the processing surface of the block was processed by a processing machine.

Operation According to the above configuration, the plurality of blocks can be attached to the processing jig such that the processing surfaces of the plurality of blocks are substantially on the same plane.

Example An example of the manufacturing method of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing an outline of a bonding method of the present invention for bonding a magnetic block of a magnetic head to be processed to a processing jig, FIG. 2 is a diagram showing a processing outline of a magnetic block, and FIG. It is a perspective view of the magnetic head processed by the invention. First, as shown in FIG. 1, a plurality of magnetic blocks 1 of the same rank are temporarily set on a processing jig 2. The magnetic blocks 1 are ranked according to the distance 19 from the apex to the tip. Next, the processing jig 2 on which the magnetic material block 1 is temporarily set is inserted into the vacuum chuck 4.
Attach to the bonding jig 3 by bonding, etc.
The adhesive jig 3 is slid on the upper surface of the magnetic block 1 to bring the upper surface of the magnetic block 1 close to the adhesive jig base 6. Then, a magnetic block suction jig 8 with a magnet 7
Is brought closer to the back surface of the bonding jig base 6, the upper surface of the magnetic block 1 is brought into close contact with the bonding jig base 6 by magnetic attraction, and a force is applied from the side of the magnetic block 1 by the push jig 9. In addition, at the side reference portion of the processing jig 2,
The reference side surfaces of the magnetic block 1 are aligned. At this time, the gap formed between the magnetic block 1 and the processing jig 2 is filled with an adhesive 10, and the magnetic block 1 and the processing jig 2 are filled.
Is fixed.

Numeral 11 denotes a gap adjusting jig which defines a total height 22 from the bottom surface of the processing jig 2 to the upper surface of the magnetic block 1 and enables the same total height bonding in which the upper surfaces of a plurality of magnetic blocks are aligned.

FIG. 2 shows a magnetic block 1 bonded to a processing jig 2.
In the figure showing the processing, the slope processing is performed by the diamond whetstone 12. The magnetic material blocks are ranked according to the dimension 19 in FIG. 4, and the apex portions are also aligned because the top surfaces are aligned and adhered. Therefore, when the top surface is polished, the magnetic gap depth is processed based on the apex portions. It is the same as being done. Further, since the upper surfaces are uniform, it is easy to process the track width 31 and the floating surface width 32 shown in FIG.

Advantageous Effects of the Invention As is clear from the above description, the present invention provides a method of arranging a block having a front gap between a reference base and a processing jig, and forming the block on the reference base on the side serving as the floating surface of the block. By fixing the block to the processing jig with the surfaces abutting, and then processing the processing surface of the block with a processing machine, the processing surfaces of multiple blocks are almost in the same plane Since a plurality of blocks can be attached to the processing jig, a magnetic head having a uniform gap depth can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a view for explaining a manufacturing method of the present invention, FIG. 2 is a schematic view of processing a magnetic block, FIG. 3 is a perspective view of a magnetic head manufactured by the present invention, and FIG. It is a figure for explaining a manufacturing method. 1 ... magnetic block, 2 ... processing jig, 10 ... adhesive.

Claims (1)

(57) [Claims] A block having a front gap is disposed between a processing jig and a reference base, and the processing is performed in a state where a processing surface to be processed as a floating surface in the block is in contact with the reference base. A method of manufacturing a magnetic head, comprising: after fixing the block to a jig, attaching the processing jig to a processing machine, and processing a processing surface of the block.