JPH1027447A - Thin-film magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin-film magnetic head with which the arrangement of a slider substrate and a suspension in parallel with high accuracy is possible and the improvement in the floating characteristic and magnetic recording and reproducing characteristic of the magnetic head is possible. SOLUTION: Spacers 32 are arranged between the joint surface of the slider substrate 12 provided with a thin-film magnetic head element and the joint surface of the suspension 30. The parallelism between the slider substrate 12 and the suspension 30 is obtd. by the spacers 32. An adhesive is applied on the region enclosed by the spacers 32 to the thickness larger than the thickness of the spacers. This adhesive is solidified within the region enclosed by the spacers 32. The slider substrate 12 and the suspension 30 are then fixed to each other while the parallelism is maintained by the spacers 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension supporting a slider provided with a thin-film magnetic head and a thin-film magnetic head having an improved connection with the slider, and more particularly to a thin-film magnetic head having improved parallelism between the two. About.

[0002]

FIG. 3 is a perspective view showing the structure of a conventional thin film magnetic head 50. As shown in FIG. The thin-film magnetic head 50 has the thin-film magnetic head element 16 on the end face 12b of the slider substrate 12, and has two rails 14 on the lower face 12a. That is, the lower surface 12a of the slider substrate 12 has a slightly concave central portion, and both sides thereof slightly project to form two rails 14. The rail 14 is formed so as to extend in the direction of relative movement between the slider substrate 12 and the magnetic recording medium.
4 is provided with a tapered portion, which makes it easy for the slider substrate 12 to slide relative to the magnetic recording medium and float.

A thin-film magnetic head element 16 is formed on the end surface 12b perpendicular to the lower surface 12a of the slider substrate 12 on both sides in the width direction by a thin-film forming technique.
The poles 16a and 17a are formed of a thin film so that the poles extend from these elements 16 to almost the center of each rail 14 in the width direction. It is exposed to. In addition, the end face 12 from each of the head elements 16 and 17
A pair of lead wires 26 and 28 are formed so as to extend toward the center of b, respectively.
Are connected to the pads 22 and 24 for the element 16 and the pads 21 and 23 for the element 17. Each of the magnetic head elements 16, 17, the poles and the lead wires 26, 28 are covered with a protective film 20 formed on the end surface 12b of the slider substrate 12, thereby being protected from the outside.
The pads 21 to 24 are pads for wire bonding, and are exposed on the surface of the protective film 20.

The slider substrate is bonded and fixed to the suspension, and while being elastically supported by the suspension, floats near the surface of the magnetic disk by receiving the wind pressure from the rotating magnetic disk in the area between the rails of the slider.
As a result, the magnetic head reads and writes data on the magnetic disk that moves relatively with the slider substrate 12 floating with a very small gap between the slider substrate 12 and the magnetic disk.

FIGS. 4 to 6 are views showing the steps of assembling the magnetic head. As shown in FIG. 4, the slider substrate 12 has a pair of rails 14 formed on one surface thereof so as to extend in one direction, and the other surface of the slider substrate 12 is a bonding surface to be bonded to the suspension 30. I have. Then, an adhesive 31 is applied to a joint area of the suspension 30, and as shown in FIG.
0 are joined with an adhesive 31. When properly joined, as shown in FIG. 6, the slider substrate 12 and the suspension 30 are fixed so as to be parallel via an adhesive 31.

[0006]

However, in this conventional thin-film magnetic head, when viewed from the direction of arrow A in FIG. 5, as shown in FIG. As a result, an assembly failure in which the attitude of the slider substrate 12 with respect to the suspension 30 is inclined tends to occur.

[0007] The same applies to the case of viewing in the direction of arrow B in FIG. As shown in FIG. 7B, when the adhesive is applied to the bonding surface with a bias, the slider substrate 12 disposed thereon is also inclined relative to the suspension 30.

As described above, the slider substrate 1 of the magnetic head
If the suspension 2 and the suspension 30 are not arranged in parallel, there is a problem that the flying characteristics and the magnetic recording / reproducing characteristics of the magnetic head deteriorate.

Such a situation is the same in the case of the MR head shown in FIG. FIG. 8 is a diagram showing an end surface of the slider substrate. FIG. 8A shows two transducers 36 and 37.
Are connected to four extraction electrodes 41 and 42 via wirings 43 and 44, respectively, and (b) shows four extraction electrodes 5 connected to one MR transducer 38 via wiring 52.
1 are connected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables a slider substrate and a suspension to be arranged in parallel with high precision, thereby improving the flying characteristics and magnetic recording / reproducing characteristics of a magnetic head. It is an object of the present invention to provide a thin-film magnetic head capable of performing the following.

[0011]

A thin-film magnetic head according to the present invention comprises a slider provided with a thin-film magnetic head element,
In a thin-film magnetic head having a suspension in which the slider is bonded by an adhesive and supports the slider,
It has a spacer provided on the joint surface of the slider or the suspension. In this thin-film magnetic head, it is preferable that the spacer is disposed so as to surround the periphery of the joining surface on at least two sides, preferably four sides, of the joining surface of the slider or the suspension.

In the present invention, a spacer is provided on the joint surface of the slider or suspension to be joined. For this reason, an adhesive is applied to the joint surface, and the slider and the suspension are rubbed with each other to expel the adhesive interposed between the spacer and the joint surface, and the joint surface of the slider and the suspension directly contacts the spacer. Layer as if to do. Then, the slider and the suspension face each other with a gap determined by the spacer, and an adhesive is interposed between them. When the adhesive is solidified, the slider and the suspension are fixed in a state of being arranged in parallel with high precision.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be specifically described with reference to the accompanying drawings. 1 and 2 are views showing a magnetic head according to an embodiment of the present invention. FIG.
As shown in FIG.
The four rod-shaped spacers 32 are arranged on the surface to be joined to the slider substrate at No. 0 so as to surround the joined surface. Each spacer 32 has the same thickness, and is formed of, for example, a polyimide resin. Further, the spacer 32 is surface-bonded to the surface of the suspension 30 by lining and fixing by heating without using an adhesive.

Then, as shown in FIG. 2, an adhesive 31 is applied to the joint surface of the suspension 30 surrounded by the four spacers 32 so as to have a thickness equal to or greater than the thickness of the spacers 32. The surface is overlaid on the spacer 32. In this case, the slider substrate 12 and the suspension 30 are slightly rubbed, the adhesive 31 existing between the spacer 32 and the slider substrate 12 is expelled, and the spacer 32 is brought into direct contact with the slider substrate 12.

Then, the space between the suspension 30 and the slider substrate 12 is held in parallel with high precision by the spacer 32, and when the adhesive 31 existing in the region surrounded by the spacer 32 is solidified, the slider substrate 12 and the suspension 30 are fixed to each other while maintaining a parallel state with high precision. Since the adhesive 31 remains in the region surrounded by the spacer 32, the adhesive strength is excellent.

As described above, it is possible to obtain a magnetic disk substrate in which the degree of parallelism between the slider and the suspension is extremely high and the degree of parallelism can be stably and surely secured.

[0017]

As described above, according to the present invention, since the spacer is arranged between the slider and the suspension, the parallelism between the two can be significantly increased regardless of the variation in the thickness of the adhesive. Can be. Moreover, the parallelism can be stably and easily secured with an extremely simple structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bonding surface of a thin-film magnetic head according to an embodiment of the present invention.

FIG. 2 is a front view showing the state of the magnetic head after the bonding.

FIG. 3 is a perspective view showing the structure of a conventional thin film magnetic head.

FIG. 4 is a diagram showing an assembling process of a conventional thin-film magnetic head.

FIG. 5 is a sectional view showing a state after joining in the assembling process.

FIG. 6 is a front view of the same.

FIG. 7 is a diagram for explaining a drawback of the related art.

FIG. 8 is a diagram showing a configuration of an MR head.

[Explanation of symbols]

12: slider substrate, 12a: lower surface, 12b
..End face, 14 ... Rail, 16, 17 ... Thin-film magnetic head element, 16a, 17a ... Pole tip, 2
1 to 24 pad, 26, 28 lead wire, 3
0 ... suspension, 31 ... adhesive, 32 ...
· Spacers, 36, 37, 38 ··· MR transducers, 41, 42, 51 · · · Extraction electrodes, 50 · · · Thin film magnetic head

Claims (2)

[Claims] 1. A thin-film magnetic head comprising a slider provided with a thin-film magnetic head element and a suspension joined to the slider by an adhesive and supporting the slider, wherein a spacer provided on a joint surface of the slider or the suspension is provided. A thin-film magnetic head comprising: 2. The thin-film magnetic head according to claim 1, wherein the spacer is disposed on at least two sides of a joint surface of the slider or the suspension.