JPH05166160A - Production of floating type magnetic head - Google Patents

Abstract

PURPOSE:To facilitate handling of a core chip and to improve workability and quality in the process for production of the floating type magnetic head. CONSTITUTION:The core chip 5 having an extended part 8 of a prescribed size is inserted into the slit part 4 of a slider material 1 having a projecting part 7 of a prescribed size in the bottom part and is tentatively fixed by a spacer 11. The handling of the core chip 5 is facilitated by a method of fixing the gap part 6 side by a glass material 12, polishing rails 2 for floating to finish a prescribed gap depth and removing the projecting part 7 and the extended part 8, then reinforcing the chip with a resin. Since the spacer 11 is not removed, the generation of the chipping and cracking of the core chip 5 is prevented.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, with the miniaturization of hard disk drives, there has been a demand for miniaturization of floating magnetic heads.

A conventional method of manufacturing a floating magnetic head will be described below. The floating magnetic head is formed of a slider material 13 and a core chip 14 shown in FIG. The slider material 13 before grinding formed of a non-magnetic material such as ceramic has two levitation rails 2 formed on the upper surface, that is, a surface facing the magnetic recording medium, and one end surface (trailing surface) in the slider longitudinal direction. ), A coil groove 3 for winding the recording / reproducing coil, and a core chip 14 formed on at least one of the levitation rails 2.
Has a slit portion 4 for insertion. Core chip 14 formed of a metal oxide magnetic material such as ferrite
Has a gap portion 6 of a predetermined non-magnetic width formed on the upper surface of the glass for performing an electromagnetic conversion operation. In the figure, 1 is the size of the gap length of the gap part 6, W is the size of the track width of the gap part 6, and d is the size of the gap depth of the gap part 6 from the upper surface of the core chip 5 to the apex part 1.
The length is up to 0.

The slider member 13 constructed as described above
A method of manufacturing a floating magnetic head using the core chip 14 and the core chip 14 will be described for each manufacturing process.

As shown in FIG. 8A, the slider material 1
The core chip 14 is temporarily fixed and arranged in the slit portion 4 of No. 3 by the spacer 11 for temporary fixing. Then, FIG. 8 (b)
As shown in FIG. 9 and FIG. 9, the front portion is molded with the glass material 12 having a low melting point, and the slider material 13 and the core chip 14 are molded.
Fix the book. After that, the spacer 11 is removed from the bottom surface side, and as shown in FIGS. 8C and 10, it is reinforced with the resin 9. Then, as shown in FIG. 8D, the slider material 1
The levitation rail 2 of No. 3 is lapped to be a mirror surface of the gap depth, and the outer shape is processed into a predetermined shape to obtain a finished product as shown in FIG.

[0006]

However, in the above-mentioned conventional method, the core chip 14 which is miniaturized and is very difficult to handle is mounted on the narrow slit portion 4 of the slider member 13.
When it is inserted into and fixed in the socket, it requires a very precise work, and it is difficult to handle and the workability is poor. Also, after temporarily fixing the core chip 14 with the spacer 11 and molding with the glass material 12, it is temporarily fixed. There was a problem that chipping and cracks were generated in the core chip 14 when the spacer 11 was removed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a method of manufacturing a floating type magnetic head which facilitates handling of a core chip and improves workability and quality.

[0008]

In order to achieve this object, a method of manufacturing a floating magnetic head according to the present invention is such that a slit portion of a slider material having a protrusion of a predetermined size on a bottom portion thereof has an extension portion of a predetermined size. Insert the core chip and temporarily fix the core chip with a spacer, then fix the gap side of the slit part with a glass material, polish the levitation rail of the slider material to a predetermined gap depth, and then This is a method in which the protruding portion and the extending portion of the core chip are cut off to regulate the slider to a predetermined total height dimension, and then the slider is reinforced with resin to complete the slider.

[0009]

By this method, the core chip can be easily handled and the core chip can be easily inserted into the slit portion of the slider material.

Further, the removal of the temporary fixing spacer is eliminated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 6 showing an embodiment of the present invention, the same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the feature of this embodiment lies in that the slider material 1 is the same as the conventional slider material 13 described above, and the slider material 1 has a length m and a height h at the bottom thereof.
7 is added, and the core chip 5 is added to the structure of the above-described conventional core chip 14 and the extension 8 having a height h is added to the lower part. The length m is equivalent to the length of the slit portion 4, and the height h is preferably 0.2 mm to 0.4 mm.

A method of manufacturing a floating magnetic head using the slider material 1 and the core chip 5 configured as described above will be described for each manufacturing process. As shown in FIGS. 2A and 3, the core chip 5 is inserted into the slit portion 4 of the slider material 1, and the bottom surface of the extending portion 8 of the core chip 5 and the bottom surface of the protruding portion 7 of the slider 1 are flush with each other. Then, the spacers 11 are temporarily fixed. This work can be performed more easily than before because the core chip 5 is provided with the extending portion 8, and the workability is improved.

Next, as shown in FIGS. 2B and 4, the front surface of the slit portion 4 is molded with the glass material 12, and the slider material 1 and the core chip 5 are permanently fixed.

Then, as shown in FIGS. 2 (c) and 5, the floating rail 2 of the slider material 1 in which the core chip 5 is incorporated is wrapped and finished to a mirror surface, and the gap depth is set to a predetermined dimension (0 to 5 μm). And

Then, as shown in FIGS. 2D and 6, the protruding portion 7 of the slider material 1 in which the core chip 5 is incorporated and the extending portion 8 of the core chip 5 are cut to regulate the slider material 1 to a predetermined size. Then, the bottom surface side of the slit portion 4 is reinforced with the resin 9. It is preferable that the resin 9 has a small shrinkage rate. This is because the mechanical strength of the slider 1 is not reduced.

By eliminating the step of removing the spacer 11 by cutting the bottom of the slider material 1, chipping and cracking of the core chip that occurs when the temporary fixing spacer 11 is removed from the slider 1 are prevented. At the same time, the difficulty of removing the spacer 11 and the like are eliminated, so that the work is not hindered.
That is, workability and productivity are improved and higher quality can be achieved.

[0019]

As is apparent from the above description of the embodiment, the present invention provides the core chip with the extending portion on the bottom surface and the slider material with the projecting portion on the bottom, and after fixing the core chip to the slider material, By the method of cutting the extending portion and the protruding portion, the core chip can be easily handled, and an excellent method for manufacturing a floating magnetic head with improved workability and quality can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state before fixing a slider material and a core chip used in a method for manufacturing a floating magnetic head according to an embodiment of the present invention.

FIG. 2 is a schematic front view showing main steps of a method of manufacturing the floating magnetic head in process order.

FIG. 3 is a perspective view of essential parts showing a state in which a core chip of the method of manufacturing the floating magnetic head is inserted into a slider material.

FIG. 4 is a perspective view of essential parts showing a state in which the core chip and the slider material are fixed in the method of manufacturing the floating magnetic head.

FIG. 5 is a perspective view of an essential part showing a state in which a front surface of the magnetic head in the method of manufacturing the floating magnetic head is mirror-finished to have a predetermined gap depth.

FIG. 6 is a perspective view of an essential part showing a state in which the protruding portion and the extended portion are cut and fixed with resin in the method of manufacturing the floating magnetic head.

FIG. 7 is a perspective view showing a state before fixing a slider material and a core chip used in a conventional method of manufacturing a floating magnetic head.

FIG. 8 is a schematic front view showing main steps of the method of manufacturing the floating magnetic head in the order of steps.

FIG. 9 is a perspective view of essential parts showing a state in which a core chip in the method of manufacturing the floating magnetic head is temporarily fixed to a slider material.

FIG. 10 is a perspective view of essential parts showing a state in which a spacer for temporary fixing is removed and reinforced with resin in the method of manufacturing the floating magnetic head.

FIG. 11 is an external perspective view of a finished product of the floating magnetic head.

[Explanation of symbols]

 1 slider material 2 core chip 7 protruding part 8 extended part

Claims (1)

[Claims] 1. A slider made of a non-magnetic material having two levitation rails on the opposite surface of a magnetic recording medium, and a slit formed on at least one of the levitation rails is made of a magnetic material having a gap portion of a predetermined size. In the floating magnetic head in which the core chip is inserted and fixed with a glass material, the core chip having an extension part of a predetermined size in the slit part of the slider material having a protrusion part of a predetermined size at the bottom is inserted, The core chip is temporarily fixed with a spacer, and then the gap side of the slit section is fixed with a glass material, then the levitation rail of the slider material is polished to a predetermined gap depth, and then the protruding section and the extension After cutting off the part and regulating it to a predetermined total height,
A method for manufacturing a floating magnetic head reinforced with resin.