JPH05182143A - Magnetic head and magnetic head device - Google Patents

Abstract

PURPOSE:To provide the magnetic head and magnetic head device which can avert the exertion of the rigidity of bending springs on the magnetic head, enables sure joining of the magnetic head and magnetic head supporting device and can deal with the trend toward smaller sizes, lower loads, lower floating amts. and lower circumferential speeds. CONSTITUTION:A slider 1 has a recessed groove 17 arriving at both flanks 15, 16 on which supporting surfaces 12 on the side opposite from a medium- facing surface 11 face each other. A lead wire 3 is a tape-like member on which conductors 32, 33 are supported by a high-polymer resin film 31. The front ends of the conductors 32, 33 are connected to drawing-out electrodes 21, 22 and the central part is conducted through the inside of the recessed groove 17.

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 conversion element attached to a slider and a magnetic head device,
More specifically, it relates to improvement of the lead wire connected to the extraction electrode of the magnetic conversion element.

[0002]

2. Description of the Related Art Conventionally, in this type of magnetic head, the lead wire connected to the extraction electrode of the magnetic conversion element is composed of a twisted pair wire, a loop is formed by the twisted pair wire, and the tip end portion thereof is formed by the magnetic conversion element. It was common to connect to the extraction electrode of. However, for example, Japanese Patent Laid-Open No. 64-217
No. 13 (US Pat. No. 4,928,195), miniaturization of the magnetic head, reduction of load applied to the magnetic head from the head supporting device, reduction of peripheral speed due to reduction of diameter of the magnetic disk, reduction of flying height, Furthermore, it is difficult to deal with the increase in the number of extraction electrodes due to the increase in the number of elements with a lead wire using a twisted pair wire. The smaller the magnetic head, the lower the load, the lower the flying height, and the lower the peripheral speed, the more susceptible it is to the spring rigidity of the loop part due to the twisted pair wire.
This is because the flying height and flying characteristics of the magnetic head are adversely affected.

In order to reduce the influence of the spring rigidity of the loop portion of the twisted pair wire, it has been attempted to make the wire diameter of the wire about 30 μm, but the joining strength to the extraction electrode is reduced, and the wire diameter of the thin wire is small. Therefore, together with the reduction in the area of the extraction electrode due to the miniaturization of the magnetic head, there arises a problem that the work of joining the extraction electrode becomes difficult.

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

Japanese Patent Publication No. 59-31128, Japanese Patent Publication No. 6-6
Japanese Patent Publication No. 0-12686 and Japanese Patent Publication No. 60-19045 disclose a technique in which a flexible lead wire having a conductor supported by a polymer resin film is used instead of the lead wire using a twisted pair wire. As an assembling structure, a head supporting device is attached to a supporting surface of a slider constituting a magnetic head, and a flexible lead wire is led out through the head supporting device, and a flexible lead wire is fixed on a slider of a magnetic head. However, the head support device is arranged on it.

[0006]

However, in the above-mentioned 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, the bending spring rigidity of the polymer resin film cannot be avoided from being applied to the magnetic head.

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

Therefore, the 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, and moreover, the magnetic head and the head supporting device. It is an object of the present invention to provide a magnetic head and a magnetic head device which can reliably be coupled to each other and can be made smaller, have a lower load, have a lower flying height, and have a lower peripheral speed.

[0009]

In order to solve the above-mentioned problems, the present invention is a magnetic head including a slider, a magnetic conversion element and a lead wire, wherein one side of the slider is a medium facing surface and the other is a medium facing surface. The magnetic conversion element is disposed on one side surface of the both side surfaces and has an extraction electrode that is exposed to the outside. And the lead wire is
A tape-shaped member supporting a conductor with a polymer resin film, characterized in that a tip end portion of the conductor is connected to the extraction electrode and an intermediate portion is guided through the concave groove.

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

[0011]

The slider has the concave groove which reaches the opposite side surfaces of the supporting surface. The lead wire is connected to the lead electrode at the tip of the conductor and is guided at the intermediate portion through the concave groove. Therefore, the head supporting device can be directly attached to the support surface from above the lead wire without being affected by the lead wire. Therefore, the magnetic head and the head support device can be reliably coupled.

The slider has a concave groove whose support surfaces reach opposite side surfaces, and the lead wire is connected to the lead-out electrode at the tip of the conductor and is guided at the intermediate portion through the concave groove. Therefore, the lead wire can be integrated with the slider of the magnetic head in the groove. Therefore, even if the lead wire is bent and the tip of the conductor is joined to the extraction electrode of the magnetic head, the spring rigidity due to bending is not added to the magnetic head, resulting in downsizing, low load, and low flying height. Also, it becomes possible to cope with lower peripheral speeds.

Since the lead wire is a tape-shaped member in which the conductor is supported by the polymer resin film, the pattern at the tip of the conductor can be increased to increase the joint area and increase the joint strength to the extraction electrode. it can. Also, not only solder connection but also ultrasonic bonding technology can be used,
Joining work becomes easy.

[0014]

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 conversion element, 3
Is a lead wire.

One side of the slider 1 is a medium facing surface 11
The opposite side is the support surface 12. The medium facing surface 11 of the slider 1 may have one to three rail portions, and may be a flat surface having no rail portions. The most projecting surface of the medium facing surface 11 constitutes an air bearing surface having a high surface property. The illustrated slider 1 has two rail portions 13 and 14 on the medium facing surface 11, and the rail portion 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 with which the support surface 12 is opposed. The groove 17 is a groove slightly deeper than the thickness of the lead wire 3.

The magnetic conversion element 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 appearing outside the side surface. Side surface 15 of slider 1 on which magnetic conversion element 2 is arranged
Is usually located at the end in the medium traveling direction (air outflow direction). The magnetic conversion element 2 may be any of a thin film magnetic conversion element, a Winchester type magnetic conversion element or a composite type magnetic conversion element manufactured according to the same process as the IC manufacturing technique. Further, the magnetic conversion element is not limited to the magnetic conversion element prepared for in-plane recording, but may be a magnetic conversion element for perpendicular recording. Further, the magnetic conversion element is not limited to the induction type magnetic conversion element, and may be a magnetic conversion element utilizing a magnetoresistive effect, or may be a multi-element type instead of a single element type.

The lead wire 3 is a tape-shaped member in which the conductors 32 and 33 are supported by the polymer resin film 31.
The conductors 32 and 33 are arranged in parallel on one surface of the polymer resin film 31, and a protective layer 34 covering the conductors 32 and 33 is attached. Polymer resin film 31
Is a polymer resin excellent in electric insulation, heat resistance and heat resistance and flexibility, such as polyimide. Polymer resin film 3
It is desirable that 1 be as thin as possible 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 protective layer 34 is made of a polymer resin material. Protective layer 3
4 can be omitted. When the protective layer 34 is omitted, it is easy to bend and the cost is low.

In the lead wire 3, the tips of the conductors 32 and 33 are connected to the extraction electrodes 21 and 22 of the magnetic conversion element 2. Solder joining or ultrasonic joining can be adopted as the connecting means. From the viewpoint of joining workability, ultrasonic joining is desirable. The middle portion of the lead wire 3 is guided through the inside of the groove 17. The middle portion of the lead wire 3 is preferably fixed inside the groove 17 by using, for example, an adhesive.

As described above, the slider 1 has the support surface 12
Has a groove 17 reaching both side surfaces 15 and 16 opposite to each other. The lead wire 3 has conductors 32 and 33 whose tip portions are connected to the extraction electrodes 21 and 22, and whose middle portion passes through the inside of the groove 17. Since it is guided by the lead wire 3, the head supporting device can be directly attached to the support surface from above the lead wire 3 without being affected by the lead wire 3. For this reason,
The magnetic head and the head support device can be reliably coupled. This point will be illustrated later.

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

Further, since the lead wire 3 is a tape-shaped member in which the conductors 32 and 33 are supported by the polymer resin film 31, the tip ends of the conductors 32 and 33, that is, the extraction electrode 2
It is possible to increase the size of the pattern of the portion to be joined to the electrodes 1 and 22 to increase the bonding area and increase the bonding strength to the extraction electrodes 21 and 22. Further, not only solder connection but also ultrasonic bonding technology can be used, and the bonding work becomes easy.

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 supporting device, and FIG. 3 is shown in FIG.
4 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 partial cross-sectional view of the magnetic head device shown in FIG. Reference numeral 4 is the magnetic head shown in FIG. 1, and 5 is a head supporting device. The head support device 5 includes a support surface 12 of the slider 1 from above the lead wire 3 arranged inside the groove 17.
Installed on. Therefore, the magnetic head 4 and the head supporting device 5 can be reliably coupled. 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 the conductor 3 thereof is bent.
The leading ends of the electrodes 2, 33 are connected to the extraction electrodes 21, 22 of the magnetic head 4.
Even when it is joined to the magnetic head, the spring rigidity due to bending is not applied 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). Conventionally, various types of head supporting devices of this type have been proposed and put to practical use. The illustrated head support device 5 is
A flexible support portion 51 is provided on one end side in the longitudinal direction, and the support surface 12 of the slider 1 forming the magnetic head 4 is joined to the lower surface of the flexible support portion 51 by means such as adhesion. The flexible support portion 51 is configured as a gimbal that allows roll movement about a first axis taken in the longitudinal direction and pitch movement 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) Since the slider has a concave groove that reaches the opposite side surfaces of the support surface, the lead wire has the tip of the conductor connected to the extraction electrode and the middle portion guided through the concave groove. It is possible to provide a magnetic head and a magnetic head device capable of reliably coupling the magnetic head and the head supporting device by directly attaching the head supporting device to the supporting surface of the slider from above the lead wire without being affected by the lead wire. .. (B) Since the slider has a concave groove with which the supporting surfaces reach the opposite side surfaces, the lead wire has the tip of the conductor connected to the extraction electrode and the middle portion guided through the concave groove. In the groove, the lead wire is integrated with the slider of the magnetic head, so that the spring rigidity due to bending of the lead wire is not added to the magnetic head, and it is possible to reduce the size, the load, the flying height and the peripheral speed. It is possible to provide a magnetic head and a magnetic head device capable of coping with the above. (C) Since the lead wire is a tape-shaped member in which a conductor is supported by a polymer resin film, it is possible to increase the bonding strength of the lead wire with respect to the extraction electrode, and not only solder connection but also ultrasonic bonding technology. It is possible to provide a magnetic head and a magnetic head device which have excellent joining workability and can be used for other purposes.

[Brief description of 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.

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

4 is a partial cross-sectional view of a magnetic head mounting portion of the magnetic head device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 slider 11 medium facing surface 12 support surface 15 and 16 side surface 17 concave groove 2 magnetic conversion element 21 and 22 extraction electrode 3 lead wire 31 polymer resin film 32 and 33 conductor

Claims (3)

[Claims] 1. A magnetic head including a slider, a magnetic conversion element, and a lead wire, wherein one side of the slider is a medium facing surface and the other side is a supporting surface, and both sides of the supporting surface face each other. The magnetic conversion element has a recessed groove that reaches the surface, the magnetic conversion element is provided 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. Is a tape-shaped member supporting a magnetic head, wherein a leading end 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 conversion element is a thin film magnetic conversion element. 3. A magnetic head device including a magnetic head and a head support device, wherein the magnetic head has a slider, a magnetic conversion element, and a lead wire, and the slider has one surface side. The medium facing surface, the opposite side is a supporting surface, and has a concave groove reaching the opposite side surfaces of the supporting surface, the magnetic conversion element is arranged on one side surface of the both side surfaces, and to the outside The lead wire is a tape-shaped member that supports a conductor with a polymer resin film, and the tip of the conductor is connected to the extraction electrode, and the middle portion is in the groove. The magnetic head device is characterized in that the head support device is attached to the support surface from above the lead wire.