JPH0697491B2 - Thin film magnetic head assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] The present invention relates to a thin-film magnetic head assembly for recording / reproducing used in a magnetic disk device, wherein a plurality of lead wires of a thin-film magnetic transducer for recording / reproducing attached to a flying slider. To solve the contact problem between the external lead wires due to the structure in which the connection pad is exposed on the surface through the insulating protective film coated on the magnetic transducer. The surface of the insulating protective film is formed into an inclined surface. By doing so, the area of each pad and the interval between the pads can be formed wide, and even when the thin film magnetic head assembly is miniaturized, it is possible to easily make the external lead wires not contact with each pad. It is connectable.

[Industrial application field]

The present invention relates to an improvement of a recording / reproducing thin film magnetic head assembly used in a magnetic disk device, and more particularly to a structure for disposing a plurality of lead wire connection pads of a recording / reproducing thin film magnetic transducer attached to a flying slider. It is about.

In recent years, magnetic disk devices have been rapidly increased in capacity and speed, and a thin-film magnetic head assembly in which a thin-film magnetic transducer for recording / reproducing is attached to a flying slider has also adopted a low floating operation during recording / reproducing. There is.

Along with this, there is a tendency that the magnetic head assembly collides with the magnetic disk medium and damages the medium surface or the like, so-called head crash occurs, and in order to avoid such an inconvenience, There is a demand for miniaturization of the magnetic head assembly.

On the other hand, in order to increase the capacity, for example, the magnetic pole width of the recording / reproducing thin-film magnetic transducer attached to the flying slider is reduced to increase the track density. Cause a decrease in For this reason, there has been proposed a combined recording / playback type magnetic head assembly in which a thin film magnetic transducer for recording and a thin film magnetic transducer for reading are provided in which such a problem is solved.

However, in this composite magnetic head assembly, since the number of lead wire connection pads from each attached thin film magnetic transducer increases, when such an assembly is miniaturized, a large number of connection areas are provided in a limited area surface. It becomes difficult to dispose the pad.

Therefore, even if the magnetic head assembly having a large number of lead wire connecting pads is downsized, the area of the large number of lead wire connecting pads and the space between the pads are as large as possible and easily arranged. A structure to gain is needed.

[Conventional technology]

A conventional thin film magnetic head assembly is shown in FIG. 4 and A in FIG.
As shown in the enlarged view of FIG. 5, recording / reproducing thin film magnetic transducers 3 are respectively provided on the air outflow end faces of the two flying rails 2 provided on the medium facing surface side of the flying slider 1 as shown by chain lines. A thick insulating protective film 4 is provided on the surface of the auxiliary insulating film. The plurality of lead wire connection pads 5 from each thin film magnetic transducer 3 are exposed on the surface through the insulating protective film.

[Problems to be solved by the invention]

By the way, the area of the plurality of lead wire connecting pads 5 arranged in an exposed state on the surface of the insulating protection film 4 in the above-mentioned conventional thin film magnetic head assembly is not shown.
In order to easily connect the external connection lead wire from the reproduction control circuit, it is required to be as large as possible within a limited area and to widen the space between the pads. In the conventional example, the width of the pads is about 0.2 mm, and the distance between the pads is about 0.
It is about 1 mm.

However, when such a thin film magnetic head assembly is miniaturized, the widths of the plurality of lead wire connecting pads 5 and the intervals between the pads are naturally reduced, and external connecting leads are attached to the pads by soldering or the like. It becomes difficult to connect the wires.

Further, in the recording / reproducing separated type composite magnetic head assembly which can obtain a relatively large reproduction output even if it is downsized, the number of the lead wire connecting pads is the thin film magnetic head set shown in FIGS. 4 and 5. Since the number of the three-dimensional lead wire connection pads 5 is approximately doubled, the width of each pad to be arranged and the interval between the pads are further reduced, and it becomes difficult to connect the external connection lead wire. However, there is a problem that a short circuit between pads is likely to occur during the connection.

In view of the above-mentioned conventional problems, the present invention does not significantly change the configuration of the head assembly, but the width of each pad and the width of each pad arranged with the arrangement surface of the plurality of lead wire connection pads being wide. It is an object of the present invention to provide a novel thin film magnetic head assembly that enables the space between them to be widened and thus facilitates the connection of external connection lead wires to these pads.

[Means for solving problems]

In order to achieve the above object, the present invention is provided with a recording / reproducing thin film magnetic transducer covered with an insulating protective film on the air outflow end surface of a flying rail in a floating slider.
Further, the surface of the plurality of pads for connecting the lead wires from the transducer exposed through the insulating protective film is formed into an inclined surface inclined to the upper end side of the slider.

[Action]

In the thin film magnetic head assembly of the present invention, the surface of the insulating protective film on which the plurality of lead wire connection pads are exposed and arranged has an inclined surface shape inclined toward the upper end side of the flying slider.
The lead wire connecting pads exposed from the reproducing thin film magnetic transducer through the insulating protective film are cut off obliquely, and the width and the interval between the pads are effectively widened.

As a result, even when the size of the recording / reproducing thin film magnetic head assembly, the recording / reproducing separated type thin film magnetic head assembly having a large number of pads for connecting lead wires, etc. is reduced, it is easy to connect the external connection lead wire to each pad. Becomes

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a thin film magnetic head assembly according to the present invention, and FIG. 2 is an enlarged perspective view of a portion A shown in FIG.

In both of these figures, reference numeral 1 denotes a levitation slider provided with two levitation rails 2, and recording / reproducing thin film magnetic transducers 3 are respectively provided on the air outflow end faces of the two levitation rails 2 as indicated by chain lines. In this embodiment, a thick insulating protective film 21 is provided on the surface thereof in the form of an inclined surface whose surface is inclined toward the upper end of the flying slider 1 by a predetermined angle θ _A as shown in the figure.

A plurality of lead wire connection pads 22 from each of the thin film magnetic transducers 3 are arranged so as to be exposed obliquely on the surface through the insulating protective film 21.

Therefore, the width of each pad 22 exposed as described above and the space between the pads 22 can be effectively widened.

In order to obtain such a structure, after the recording / reproducing thin film magnetic transducer 3 is formed on each air outflow end surface of the two flying rails 2 of the floating slider 1 by the thin film forming step and the photo ringography step, A plurality of lead wire connection pads 22 of the magnetic transducer 3 are formed of a copper plating layer by a mask plating method or the like.

Next, an insulating protective film 21 made of alumina (Al ₂ O ₃ ) or silicon dioxide (SiO ₂ ) is formed on the magnetic transducer 3 including the plurality of lead wire connection pads 22 by a sputtering method.

After that, by lap polishing the pad provision planned region on the surface of the insulating protective film 21 by a predetermined angle θ _A , the plurality of lead wire connection pads 22 can be exposed.

FIG. 3 is a perspective view showing another embodiment of the thin film magnetic head assembly according to the present invention, and the same parts as those in FIG. 1 are designated by the same reference numerals.

This embodiment is different from the embodiment shown in FIG. 1 in that a plurality of lead wires are connected from a recording / reproducing thin film magnetic transducer (not shown) attached to each air outflow end surface of two flying rails 2 in a flying slider 1. Pads 32 are provided near both ends of the air outflow end face as shown by the chain line, and a thick insulating protective film 31 provided on the surface of the thin film magnetic transducer is used to extend the length of the flying slider 1 as shown. That is, the upper surface and the upper surface in the vertical direction are cut at a predetermined angle θ _B , and a part of the plurality of lead wire connection pads 32 is exposed and arranged in an inclined surface shape.

With the configuration of this embodiment, the same purpose and effect as those of the embodiment of FIG. 1 can be obtained.

〔The invention's effect〕

As is clear from the above description, according to the thin film magnetic head assembly of the present invention, a plurality of lead wire connecting pads from the recording / reproducing thin film magnetic transducer exposed and arranged on the limited surface of the insulating protective film. It is possible to effectively increase the area (width) and the space between each pad by 1 / sin θ times, and it is easy to use soldering or bonding without contacting the external lead wires to the pad. It has the great advantage that it can be connected.

Therefore, it is extremely advantageous when applied to miniaturization of a recording / reproducing thin film magnetic head assembly or a recording / reproducing separated type thin film magnetic head assembly having a large number of pads for connecting lead wires.

[Brief description of drawings]

1 is a perspective view showing an embodiment of a thin film magnetic head assembly according to the present invention, FIG. 2 is an enlarged perspective view of a portion A shown in FIG. 1, and FIG. 3 is a thin film magnetic head assembly according to the present invention. FIG. 4 is a perspective view showing another embodiment of a solid body, FIG. 4 is a perspective view for explaining a conventional thin film magnetic head assembly, and FIG. 5 is an enlarged perspective view of a portion A shown in FIG. 1 to 3, 1 is a floating slider, 2 is a flying rail, 3 is a thin film magnetic transducer for recording / reproducing, 21 and 31 are insulating protective films having inclined surfaces, and 22 and 32 are pads for connecting lead wires. Are shown respectively.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Rimei Kanemine 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa, Fujitsu Limited (72) Inventor Yoshio Koshikawa 1015 Kamedota, Nakahara-ku, Kawasaki, Kanagawa FUJITSU LIMITED (56) Reference JP-A-61-148622 (JP, A)

Claims (1)

[Claims] 1. A levitation slider (1) having a plurality of levitation rails (2) on the surface facing a magnetic recording medium, and an air outflow end surface of at least one levitation rail (2) of the slider (1). The recording provided by being covered with an insulating protective film (21)
A thin film magnetic transducer (3) for reproduction, and a plurality of lead wire connection pads (22) from the magnetic transducer (3) are exposed on the surface of the head assembly through the insulating protective film (21). In the constitution, the surface of the insulating protection film (21) is formed into an inclined surface, and the lead wire connection pads (22) are exposed on the inclined surface.