JP2931466B2 - Magnetic head and magnetic head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head having a magnetic transducer attached to a slider and a magnetic head device.
More specifically, the present invention relates to improvement of a lead wire connected to an extraction electrode of a magnetic transducer.

[0002]

2. Description of the Related Art Conventionally, in a magnetic head of this type, a lead wire connected to an extraction electrode of a magnetic transducer is formed of a twisted pair wire, a loop is formed by the twisted pair wire, and a tip of the loop is formed. Was generally connected to the extraction electrode. However, for example, Japanese Unexamined Patent Publication No.
No. 13 (U.S. Pat. No. 4,928,195), the size of the magnetic head can be reduced, the load applied to the magnetic head from the head support device can be reduced, the peripheral speed can be reduced as the diameter of the magnetic disk decreases, and the flying height can be reduced. Furthermore, it is difficult to cope with an increase in the number of extraction electrodes due to the increase in the number of elements by using a twisted pair lead wire. As the miniaturization, lower load, lower flying height and lower peripheral speed of the magnetic head progress, the influence of the spring stiffness of the loop part by the twisted pair wire becomes more susceptible,
This is because the flying height and flying characteristics of the magnetic head are adversely affected.

[0003] In order to reduce the influence of the spring stiffness of the loop portion of the twisted pair wire, an attempt has been made to reduce the wire diameter of the wire, for example, to about 30 µm. For this reason, in conjunction with the reduction in the area of the extraction electrode accompanying the downsizing of the magnetic head, there arises a problem that the joining operation to the extraction electrode becomes difficult.

Furthermore, in the case of a multi-element type magnetic head, since a large number of independent wires exist in a small space, the joining operation becomes extremely troublesome.

JP-B-59-31128, JP-B-6-31128
Japanese Patent Publication No. 0-12686 and Japanese Patent Publication No. 19045/1985 disclose a technique using a flexible lead wire having a conductor supported by a polymer resin film instead of a lead wire using a twisted pair wire. As an assembly structure, a head support device is attached to the support surface of the slider constituting the magnetic head, and a flexible lead wire is led out over the head support device, and the flexible lead wire is fixed on the slider of the magnetic head In addition, the head support device is arranged thereon.

[0006]

2. Description of the Related Art However, in the above prior art using a flexible lead wire, a head support device is attached to a support surface of a slider constituting a magnetic head, and the flexible lead wire is led out over the head support device. In this case, it cannot be avoided that the bending spring rigidity of the polymer resin film is applied to the magnetic head.

In the case of a structure in which a flexible lead wire is fixed on a slider of a magnetic head and a head supporting device is disposed thereon, it is possible to avoid the bending spring rigidity of the polymer resin film from being applied to the magnetic head. However, a flexible lead wire may be interposed between the magnetic head and the head support device, and the coupling between them may be insufficient.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to prevent the bending spring rigidity of the polymer resin film from being applied to the magnetic head. It is an object of the present invention to provide a magnetic head and a magnetic head device which can securely combine the magnetic heads and can cope with downsizing, low load, low flying height, and low peripheral speed.

[0009]

In order to solve the above-mentioned problems, the present invention relates to a magnetic head including a slider, a magnetic transducer, and a lead wire. The side is a supporting surface, and the supporting surface has a concave groove reaching both opposing side surfaces, and the magnetic transducer has an extraction electrode arranged on one side surface of the both side surfaces and appearing outside. And the lead wire is
A tape-like member supporting a conductor by a polymer resin film, wherein a tip portion of the conductor is connected to the extraction electrode, and an intermediate portion is guided through the concave groove.

A magnetic head device according to the present invention is characterized by a combination of the above-described magnetic head and a head supporting device.

[0011]

The slider has a concave groove that reaches the opposite side surfaces of the support surface. The lead wire is connected at the leading end of the conductor to the extraction electrode, and is guided at the intermediate portion through the concave groove. from without being affected by lead wires, directly attach to a head support device in contact with the support surface over the lead
It is possible that. For this reason, the magnetic head and the head support device can be reliably connected.

[0012] The slider has a concave groove reaching the opposite side surfaces of the supporting surface, and the lead wire is connected at a leading end of the conductor to the extraction electrode, and is guided at an intermediate portion through the concave groove. Therefore, the lead wire can be integrated with the slider of the magnetic head in the concave groove. Therefore, even when the lead wire is bent and the tip of the conductor is joined to the extraction electrode of the magnetic head, the spring stiffness accompanying the bending is not added to the magnetic head, and the size, the load and the flying height are reduced. In addition, it is possible to cope with a low peripheral speed.

Since the lead wire is a tape-like member that supports the conductor with a polymer resin film, it is necessary to increase the pattern of the tip of the conductor, increase the bonding area, and increase the bonding strength to the extraction electrode. it can. In addition, not only solder connection but also ultrasonic bonding technology can be used,
The joining work becomes easy.

[0014]

FIG. 1 is a perspective view of a magnetic head according to the present invention. In the figure, 1 is a slider, 2 is a magnetic transducer, 3
Is a lead wire.

The slider 1 has a medium facing surface 11 on one side.
The opposite side is the support surface 12. The medium facing surface 11 of the slider 1 may have one to three rails, and may be a flat surface without the rails. The most protruding surface of the medium facing surface 11 forms an air bearing surface having high surface properties. The illustrated slider 1 has two rails 13 and 14 on a medium facing surface 11, and the rail 1
The surfaces 3 and 14 are used as air bearing surfaces. The slider 1 has a concave groove 17 that reaches both side surfaces 15 and 16 where the support surface 12 faces. The concave groove 17 is a groove slightly deeper than the thickness of the lead wire 3.

The magnetic transducer 2 is provided on one of the opposite side surfaces 15 and 16 of the slider 1, for example, the side surface 15, and has extraction electrodes 21 and 22 which appear outside the side surface. Side surface 15 of slider 1 on which magnetic transducer 2 is arranged
Is usually located at the end in the medium running direction (air outflow direction). The magnetic transducer 2 may be a thin-film magnetic transducer, a Winchester-type magnetic transducer, or a composite-type magnetic transducer manufactured according to the same process as the IC manufacturing technology. Further, the magnetic transducer is not limited to the magnetic transducer prepared for longitudinal recording, but may be a magnetic transducer for perpendicular recording. Further, the present invention is not limited to the inductive magnetic transducer, but may be a magnetic transducer utilizing the magnetoresistance effect. The present invention is not limited to a single element but may be a multi-element.

The lead wire 3 is a tape-shaped member in which the conductors 32 and 33 are supported by the polymer resin film 31.
On one surface of the polymer resin film 31, the conductors 32 and 33 are arranged in parallel, and a protective layer 34 covering the conductors 32 and 33 is attached. Polymer resin film 31
Is a polymer resin with excellent electrical insulation, heat resistance and flexibility,
For example, polyimide is used. It is desirable that the polymer resin film 31 be as thin as possible in order to increase flexibility. The conductors 32 and 33 are made of, for example, copper. The number and pattern of the conductors 32 and 33 are arbitrary. The protection layer 34 is made of a polymer resin material. Protective layer 3
4 can be omitted. If the protective layer 34 is omitted, the bending becomes easy and the cost is reduced.

The lead wire 3 has the ends of the conductors 32 and 33 connected to the extraction electrodes 21 and 22 of the magnetic transducer 2. As the connecting means, solder bonding or ultrasonic bonding can be adopted. Ultrasonic joining is desirable from the viewpoint of joining workability. The lead wire 3 has an intermediate portion guided through the inside of the concave groove 17. The middle part of the lead wire 3 is desirably fixed inside the concave groove 17 using, for example, an adhesive.

As described above, the slider 1 is supported on the support surface 12.
Each of the lead wires 3 has the leading ends of the conductors 32 and 33 connected to the extraction electrodes 21 and 22, and the intermediate part passes through the inside of the recessed groove 17. because they led Te, it can be attached taken without being affected by lead wires 3, to direct the head support device is brought into contact with the support surface over the lead 3. For this reason, the magnetic head and the head support device can be reliably connected. This will be illustrated later.

Moreover, the lead wire 3 can be integrated with the slider 1 of the magnetic head inside the concave groove 17. Therefore, even when the lead wire 3 is bent and the ends of the conductors 32 and 33 are joined to the extraction electrodes 21 and 22 of the magnetic head, the spring rigidity accompanying the bending is not added to the magnetic head. It is also possible to cope with lower load, lower flying height, and lower peripheral speed.

Further, since the lead wire 3 is a tape-like member supporting the conductors 32 and 33 by the polymer resin film 31, the leading ends of the conductors 32 and 33, that is, the extraction electrodes 2 are provided.
By increasing the pattern of the portion to be joined to the first and second electrodes 22 and 22, the joining area can be increased, and the joining strength to the extraction electrodes 21 and 22 can be increased. In addition, not only the solder connection but also an ultrasonic bonding technique or the like can be used, and the bonding operation is facilitated.

FIG. 2 is a perspective view of a magnetic head device in which the magnetic head according to the present invention is assembled to a head support device, and FIG.
2 is an enlarged perspective view of a magnetic head mounting portion of the magnetic head device shown in FIG. 4, and FIG. 4 is a partially broken sectional view of the magnetic head device shown in FIG. 4 is a magnetic head shown in FIG. 1, and 5 is a head support device. The head support device 5 holds the slider 1 from above the lead wire 3 arranged inside the concave groove 17.
Mounted on For this reason, the magnetic head 4 and the head support device 5 can be reliably connected. Further, since the lead wire 3 is integrated with the slider 1 of the magnetic head 4 inside the concave groove 17, the lead wire 3 is bent and
2 and 33 are connected to the extraction electrodes 21 and 22 of the magnetic head 4.
Even when the magnetic head is joined, the spring rigidity accompanying bending is not added to the magnetic head.

The head supporting device 5 supports the magnetic head 4 so that the magnetic head 4 can follow the surface fluctuation of a magnetic disk (not shown). Various types of such head support devices have been proposed and put into practical use. The illustrated head support device 5 includes:
A flexible support portion 51 is provided at one end in the longitudinal direction, and a support surface 12 of the slider 1 constituting the magnetic head 4 is connected to a lower surface of the flexible support portion 51 by, for example, bonding. The flexible support 51 is configured as a gimbal that allows roll motion about a first axis taken in the longitudinal direction and pitch motion about a second axis orthogonal to the first axis.

[0024]

As described above, according to the present invention, the following effects can be obtained. (A) The slider has a concave groove that reaches the opposite side surfaces of the support surface, and the lead wire is connected at the leading end of the conductor to the extraction electrode, and the intermediate part is guided through the concave groove. A magnetic head and a magnetic head device capable of securely connecting a magnetic head and a head support device by mounting a head support device directly on a support surface of a slider from above a lead wire without being affected by a lead wire. . (B) The slider has a concave groove that reaches the opposite side surfaces of the support surface, and the lead wire is connected at the leading end of the conductor to the extraction electrode and the intermediate part is guided through the concave groove. In the concave groove, the lead wire is integrated with the slider of the magnetic head, and the spring rigidity accompanying the bending of the lead wire is not added to the magnetic head, resulting in miniaturization, low load, low flying height, and low peripheral speed. Can provide a magnetic head and a magnetic head device that can cope with the above. (C) Since the lead wire is a tape-shaped member in which the conductor is supported by a polymer resin film, the joining strength of the lead wire to the extraction electrode can be increased. It is possible to provide a magnetic head and a magnetic head device excellent in joining workability that can also be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head according to the present invention.

FIG. 2 is a perspective view of a magnetic head device using the magnetic head according to the present invention shown in FIG.

1. FIG. 3 is an enlarged view of a magnetic head mounting portion of the magnetic head device shown in FIG.

FIG. 4 is a partially broken sectional view of a magnetic head mounting portion of the magnetic head device shown in FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 slider 11 medium facing surface 12 support surface 15, 16 side surface 17 concave groove 2 magnetic transducer 21, 22 extraction electrode 3 lead wire 31 polymer resin film 32, 33 conductor

Continuation of front page (56) References JP-A-52-9417 (JP, A) JP-A-53-42019 (JP, A) JP-A-52-8813 (JP, A) (58) Fields investigated (Int .Cl. ⁶ , DB name) G11B 5/31 G11B 5/60

Claims (3)

(57) [Claims] 1. A magnetic head including a slider, a magnetic transducer, and a lead wire, wherein the slider has a medium facing surface on one side and a support surface on the opposite side, and both sides of the support surface facing each other. The magnetic transducer element is disposed on one side surface of the both side surfaces and has an extraction electrode that appears to the outside, and the lead wire is a conductor made of a polymer resin film. A magnetic head, characterized in that a tip portion of the conductor is connected to the extraction electrode, and an intermediate portion is guided through the concave groove. 2. The magnetic head according to claim 1, wherein the magnetic transducer is a thin-film magnetic transducer. 3. A magnetic head device including a magnetic head and a head support device, wherein the magnetic head has a slider, a magnetic transducer, and a lead wire, and the slider has one surface side. The medium facing surface, the opposite side is a supporting surface, the supporting surface has a concave groove reaching both opposing side surfaces, and the magnetic transducer is disposed on one side surface of the both side surfaces, and is provided outside. The lead wire is a tape-shaped member supporting a conductor by a polymer resin film, a tip of the conductor is connected to the take-out electrode, and an intermediate portion is in the concave groove. Wherein the head support device is attached to the support surface from above the lead wire.