JP2561725Y2 - 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 device and relates to a pair of extraction electrodes provided in a magnetic transducer.
By connecting a lead wire having a center conductor with a cross-sectional diameter of 15 to 40 μm, the influence of the spring property of the lead wire on the slider is reduced, the flying attitude is stabilized, and the diameter of the loop formed by the lead wire is reduced. It is possible to provide a magnetic head device suitable for forming a thin magnetic disk device having a large storage capacity.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk device and a magnetic head device which float using a dynamic pressure generated by running of the magnetic disk while maintaining a small air bearing gap with the magnetic disk. Is used.

FIG. 11 is a diagram showing the configuration of a conventional magnetic disk device incorporating a magnetic head device, wherein 1 is a magnetic disk, 2 is a magnetic head device, and 3 is a positioning mechanism. The magnetic disk 1 is driven to rotate in the direction of arrow a by a rotation drive mechanism (not shown). The magnetic head device 2 is positioned by being driven by the positioning mechanism 3 on the magnetic disk 1 in the direction of the arrow b1 or b2.
Writing and reading to and from the magnetic disk 1 are performed on a predetermined track.

[0004] The magnetic head device 2 has a head support device 4 and a magnetic head 5. The head support device 4 supports the magnetic head 5 so as to allow the magnetic head 5 to perform a pitch motion and a roll motion. Such a head support device 4
Is known, for example, from Japanese Patent Publication No. 58-22827.

FIG. 12 is a front view of a magnetic head device, and FIG.
Is also a bottom view. The head support device 4 has a flexible member 42 also made of a thin metal plate attached to a free end at one longitudinal end of a support member 41 made of a thin metal plate.
2, the magnetic head 5 is attached to the lower surface.
A load force for pressing the magnetic head 5 is applied to the magnetic disk 1 (see FIG. 11). The flexible body 42 has two outer flexible frame portions 4 extending substantially parallel to the longitudinal axis O1 of the support body 41.
21 and 422, a horizontal frame 423 connecting the outer flexible frame portions 421 and 422 at ends separated from the support 41, and an outer flexible frame portion 421 and 422 from a substantially central portion of the horizontal frame 423.
And a central tongue-shaped portion 424 having a free end at the distal end, and having one end opposite to the direction in which the horizontal frame 423 is located near the free end of the support 41. It is attached by means such as welding.

On the upper surface of the central tongue 424 of the flexible body 42, for example, a hemispherical load projection 425 is provided. 424 to transmit the load force. The load projection 425 may be provided on the lower surface near the free end of the support 41. The magnetic head 5 is attached to the lower surface of the central tongue 424 by means such as bonding. The magnetic head 5 is attached to the magnetic head support device 4 such that the length direction coincides with the longitudinal direction of the head support device 4.

FIG. 14 is a side view of the magnetic head viewed from the medium outflow direction a. The magnetic head 5 includes a magnetic transducer 52 on a side end surface 513 of the slider 51 in the medium outflow direction, and a surface 512 opposite to the medium facing surface 511 is bonded and fixed to the head support device 4.

The side end surface 5 of the slider 51 in the medium outflow direction a
13 is provided with extraction electrodes 53 and 54 that are electrically connected to the coil of the magnetic transducer 52.
One end of each of the lead wires 61 and 62 is bonded to each of the reference numerals 4. The extraction electrodes 53 and 54 are arranged close to one end of the slider 51. One end of each of the lead wires 61 and 62 is connected and fixed to the extraction electrodes 53 and 54, and then, is led out in the same direction by being twisted to form a loop, thereby forming a loop.
Guide over. 7 is a coating resin.

As shown in FIG. 15, the lead wires 61 and 62 have a structure in which a metal coating layer 602 is applied to the surface of a central conductor 601 and the periphery of the metal coating layer 602 is covered with an insulating sheath coating 603. I have. The center conductor 601 is 45-50μ
It has a sectional diameter t1 of m and is made of a metal material having excellent conductivity such as Cu or Au. The metal coating layer 602 is made of a metal material such as Au and has a layer thickness t2 of 1 to 3 μm. The insulating outer cover 603 is made of polyurethane or the like, and has a layer thickness t3 of 3 to 6 μm.

[0010]

However, the above-mentioned conventional magnetic head device has the following problems. (A) Central conductor 601 forming lead wires 61 and 62
However, since it has a cross-sectional diameter t1 of 45 to 50 μm, the lead wires 61 and 62 function as cantilever springs for applying spring pressure from one end side of the slider 51 in the width direction, and the floating posture becomes unstable. In particular, as the shape of the slider 51 is reduced, the influence of the spring property of the lead wires 61 and 62 becomes more liable to occur, and the flying attitude becomes unstable. The miniaturization of the magnetic head is an extremely effective means for responding to the increase in the density of magnetic recording and the increase in the read / write speed, as disclosed in, for example, Japanese Patent Application Laid-Open No. Sho. The miniaturization is effective in reducing the flying height and spacing loss necessary for achieving high-density recording. In addition, in combination with the gimbal (head support device), the miniaturization increases the resonance frequency, and prevents crashes and This is because it is effective in improving durability, and furthermore, an appropriate balance between the dynamic pressure and the gimbal spring pressure is maintained, the floating posture is maintained well, and stable floating characteristics are obtained. Further, the reduction in mass due to miniaturization results in a faster access movement of the arm supporting the gimbal.

The instability of the flying posture due to the spring properties of the lead wires 61 and 62 may reduce the above-mentioned advantage due to the miniaturization, and is a problem that must be solved in miniaturization. (B) In addition to the above-described linear shape, the lead wires 61 and 62 have one ends connected and fixed to the extraction electrodes 53 and 54 and lead in the same direction to form a loop.
Reference numerals 1 and 62 function as cantilever springs for applying spring pressure from one end of the slider 51 in the width direction. For this reason, a similar problem has occurred. (C) When the distance d1 between the terminal electrodes 53 and 54 is reduced, the lead wires 61 and 6 between the extraction electrodes 53 and 54 are used.
2 is more likely to cause contact. In order to avoid this, the bonding operation of the lead wires 61, 62 to the extraction electrodes 53, 54 must be performed with great care, which makes the bonding operation more difficult. (D) The loop diameters D1 and D2 formed by the lead wires 61 and 62 become large and swell greatly outside the slider 51. For this reason, the space occupied by the lead wires 61 and 62 is increased, which has been an obstacle in reducing the size and thickness of the magnetic disk device. In addition, with small size and thinning,
It also becomes an obstacle when increasing the storage capacity by adding magnetic disks.

[0012] Therefore, an object of the present invention is to solve the conventional problems to the aforementioned, to reduce the effect of the spring of the lead relative to the slider, the floating posture even if the slider is downsized can be kept stable Another object of the present invention is to provide a magnetic head suitable for constructing a magnetic disk device that is small, thin, and has a large storage capacity by reducing the loop diameter of a lead wire.

[0013]

In order to solve the above-mentioned problems , a magnetic head device according to the present invention has a magnetic head having a slider and a magnetic transducer, and a magnetic head device that allows a pitch motion and a roll motion in the magnetic head. A head supporting device having the magnetic head attached to a tip thereof, and a lead wire connected to a magnetic transducer of the magnetic head. The above
The rider is located on one side in the thickness direction orthogonal to the air outflow direction.
A medium facing surface, and a surface opposite to the medium facing surface is a front surface;
It is attached to the head support device. The magnetic conversion
The element is provided at one end of the slider in the air outflow direction.
Having at least a pair of extraction electrodes,
A pair of extraction electrodes is one end of the slider in the air outflow direction.
The surfaces are spaced apart from each other. The lead
At least one pair of wires is provided, and
Each is made of continuous wire and has a cross-sectional diameter of 15 to 40 μm.
It has a central conductor. Further, the pair of lead wires is
In the vicinity of the tip of the head support device, individually
Are separated. One of the separated leads is at the end
Is located on the one end face in the air outflow direction of the slider.
And perpendicular to the air outflow direction and the thickness direction.
The pair of extraction electrodes from one side in the slider width direction.
And is fixedly connected. Separation
The other end of the lead is
On the one end face in the outflow direction, the slider width direction
From the other side to the other of the pair of extraction electrodes
And the connection is fixed .

[0014]

[Function] Each of the lead wires is made of a continuous wire material,
Since the center conductor has a cross-sectional diameter of 15 to 40 μm, the influence of the spring property of the lead wire on the slider is reduced, the flying attitude can be stably maintained even when the slider is downsized, and the loop diameter of the lead wire is reduced. Thus, a magnetic head device suitable for forming a small, thin, and large-capacity magnetic disk device can be obtained. Small cross-section of center conductor
If you run out of wires, handle lead wires and
And difficulties in connection work,
It is easy to cause disconnection of the lead wire. In addition, electric resistance increases
The read / write signal is greatly attenuated due to
The circuit load on the road increases. To avoid these problems
To improve the performance of magnetic heads and read / write circuits and read
Considering the improvement of wire connection work, acceptable center conductor
15 μm is the limit for reducing the cross-sectional diameter. Cross section diameter is 40
If it exceeds μm, it will float due to the spring property of the lead wire
It turned out that the instability of the forces could not be ignored. Furthermore,
The pair of lead wires is near the tip of the head support device.
And are individually separated. One of the separated leads
Is located on one end surface of the slider in the air outflow direction.
From one side of the slider width direction,
Guided on one side and fixedly connected. Isolated
The other end of the lead wire is
From the other side in the slider width direction
Guided on the other of the pair of extraction electrodes and connected and fixed
Have been. This allows the slider to move in the width direction.
Make sure that the springs of the lead wires are applied from both sides in a balanced state.
become. For this reason, compared to the conventional structure of a cantilever spring,
The adverse effect of the spring property of the lead wire on the slider is reduced.
You. In addition, lead wires are connected to each of the extraction electrodes.
Each end of the lead wire
The extraction electrodes should be opposite from each other
Can be bonded. For this reason, the bonding work
It will be easier. Furthermore, the loop with the lead wire
Can be individually curved and formed. others
Therefore, the loop diameter can be reduced.

As an additional means for further reducing the influence of the spring property of the lead wire on the slider, the lead wire is fixed to a lead wire fixing portion provided at the tip of the head support device. Each lead wire is separated from the extraction electrode of the magnetic transducer and connected to the extraction electrode. Thereby, the influence of the spring property of the lead wire on the slider is further reduced.

As an additional means for further reducing the influence of the spring property of the lead wire on the slider, each of the lead wires is made to be opposite to each other from both sides in the width direction orthogonal to the medium outflow direction. , And is fixedly connected to the extraction electrode. As a result, the spring property of the lead wire is applied to the slider from both sides in the width direction in a state where the spring properties of the lead wire are balanced. Therefore, the adverse effect of the spring property of the lead wire on the slider is reduced as compared with the conventional structure of the cantilever spring.

When a lead wire is bonded to each of the extraction electrodes, one end of each of the lead wires can be bonded to the extraction electrode from both sides in the width direction so as to be opposite to each other. This facilitates the bonding operation.

The loops formed by the lead wires can be formed by individually bending each of the lead wires. For this reason, the loop diameter can be reduced.

The structure and type of the magnetic head are not limited as long as it is a floating magnetic head having a slider. For example, the present invention can be widely applied to a Winchester type magnetic head, a composite type magnetic head, a thin film magnetic head and the like. As the head support device, any structure that has already been proposed or will be proposed can be used as long as the structure supports the magnetic head so as to allow the pitch movement and the roll movement of the magnetic head.

[0020]

FIG. 1 is an enlarged front view showing a magnetic head mounting portion of a magnetic head device according to the present invention, FIG. 2 is a bottom view thereof, and FIG. 3 is a side view of the magnetic head viewed from a medium outflow direction a. It is. In the figure, the same reference numerals as those in FIGS. 11 to 15 indicate the same components.

The magnetic head 5 has a magnetic transducer 5 at one end in the longitudinal direction of the slider 51 selected in the medium outflow direction a.
2 and is attached to the magnetic head support device 4 such that the length direction coincides with the longitudinal direction of the head support device 4. The mounting direction of the magnetic head 5 is shown in FIG.
The direction may differ by 0 degrees.

The magnetic transducer 52 is composed of an inductive element or a magnetostrictive element, and includes take-out electrodes 53 and 54 arranged near one end of the slider 51 in the width direction. The extraction electrodes 53 and 54 shown in FIG.
Are provided side by side in the thickness direction. Extraction electrode 5
One ends of the lead wires 61 and 62 which are twisted are connected and fixed to the reference numerals 3 and 54, respectively.

As shown in FIG. 4, each of the lead wires 61 and 62 has a center conductor 601 having a sectional diameter t1 of 15 to 40 μm. The center conductor 601 is made of a metal material having excellent conductivity, such as Cu or Au, as in the related art. Metal coating layer 60 covering the surface of central conductor 601
2 is made of a metal material such as Au, and has a layer thickness t of 0 to 3 μm.
2 The insulating outer cover 603 is made of polyurethane or the like, and has a layer thickness t3 of 2 to 6 μm. Such lead wires 61 and 62 are used, for example, as bonding wires for ICs, and can be easily obtained.

As described above, the lead wires 61 and 62
Since the center conductor 601 of 5 to 40 μm is provided, the influence of the spring properties of the lead wires 61 and 62 on the slider 51 is reduced, and the flying attitude can be stably maintained even when the slider 51 is downsized. Further, the loop diameter of the lead wires 61 and 62 can be reduced.

One end of each of the lead wires 61 and 62 is
It is connected and fixed to the extraction electrodes 53 and 54 so as to be opposite to each other from both sides in the width direction orthogonal to the medium outflow direction a. With such a connection structure, the slider 51
The springs of the lead wires 61 and 62 are applied in a balanced state from both sides in the width direction, and the lead wire 6 for the slider 51 is compared with the conventional structure of the cantilever spring.
The adverse effects of the spring properties of the sliders 1 and 62 are reduced, and a stable flying posture can be ensured even when the slider 51 is reduced in size and thickness.

When bonding the lead wires 61 and 62 to the extraction electrodes 53 and 54, respectively, one end of each of the lead wires 61 and 62 is set to be opposite to each other from both sides in the width direction. Bonding to the extraction electrodes 53 and 54 is possible. This facilitates the bonding operation. The loop formed by the lead wires 61 and 62 can be formed by individually bending each of the lead wires 61 and 62 as shown. For this reason, the loop diameter can be reduced.

FIGS. 5 to 10 show other examples of the magnetic head device according to the present invention. First, in the embodiment of FIG. 5, the medium facing surface 511 of the slider 51 has a flat shape without a rail, and has a magnetic transducer 52 at an intermediate portion in the width direction. Each of the extraction electrodes 53 and 54 is arranged at one end of the slider 51 in the width direction at an interval in the thickness direction. The lead wires 61 and 62 are in the medium outflow direction a
Are connected and fixed to the extraction electrodes 53 and 54 so as to be opposite to each other from both sides in the width direction perpendicular to the electrodes.

FIG. 6 shows an embodiment in which concave grooves 514 and 515 are provided at both ends in the width direction of the slider 51, and FIG. 7 shows an example in which the magnetic transducer 52 is arranged close to one end in the width direction. Is shown.

In the embodiment shown in FIG. 8, the extraction electrodes 53 and 54 are arranged at both ends in the width direction of the slider 51 with a space therebetween. The lead wires 61 and 62 are connected and fixed to the extraction electrodes 53 and 54 so as to be opposite to each other from both sides in the width direction orthogonal to the medium outflow direction a.

FIG. 9 shows an example in which concave grooves 514 and 515 are provided at both ends in the width direction of the slider 51, and FIG. 10 shows an example in which the magnetic transducer 52 is arranged near one end in the width direction. In FIG. 10, the extraction electrodes 53 and 54 are
1 are shifted from each other in the width direction. The extraction electrodes 5 are arranged so that the lead wires 61 and 62 are opposite to each other from both sides in the width direction orthogonal to the medium outflow direction a.
3 and 54.

In any of the embodiments, the lead wire 61,
62 has a central conductor 601 having a cross-sectional diameter of 15 to 40 μm, and the same operation and effect as described in the embodiment of FIGS.

[0032]

As described above, according to the present invention, the following effects can be obtained. (A) Since the lead wire has a center conductor having a cross-sectional diameter of 15 to 40 μm, the influence of the spring property of the lead wire on the slider is reduced, and the flying posture can be stably maintained even when the slider is downsized. It is possible to provide a magnetic head device suitable for forming a magnetic disk device in which a bonding operation is easy, the diameter of a loop formed by a lead wire is reduced, and the storage device is small, thin, and has a large storage capacity. (C) Each of the lead wires is opposite to each other from both sides in the width direction orthogonal to the medium outflow direction,
Since it is connected and fixed to the extraction electrode, the spring property of the lead wire is applied to the slider from both sides in the width direction in a balanced state, and the adverse effect of the spring property of the lead wire on the slider is further reduced. (D) When bonding a lead wire to each of the extraction electrodes, one end of each of the lead wires can be bonded to the extraction electrode from both sides in the width direction so as to be opposite to each other, thus facilitating the bonding operation. A magnetic head and a magnetic head device can be provided. (E) It is possible to provide a magnetic head and a magnetic head device suitable for forming a small, thin, and large-capacity magnetic disk device by reducing the loop diameter of the lead wire.

[Brief description of the drawings]

FIG. 1 is a front view showing a magnetic head mounting portion of a magnetic head device according to the present invention.

FIG. 2 is a bottom view showing a magnetic head mounting portion of the magnetic head device according to the present invention.

FIG. 3 is a side view of the magnetic head device according to the present invention as viewed from a medium outflow direction.

FIG. 4 is a view showing a reel used in the magnetic head device according to the present invention;
It is an expanded sectional view of a D line.

FIG. 5 5 shows another embodiment of the magnetic head device according to the present invention.
FIG.

FIG. 6 5 shows another embodiment of the magnetic head device according to the present invention.
FIG.

FIG. 7 5 shows another embodiment of the magnetic head device according to the present invention.
FIG.

FIG. 8 5 shows another embodiment of the magnetic head device according to the present invention.
FIG.

FIG. 9 5 shows another embodiment of the magnetic head device according to the present invention.
FIG.

FIG. 10 Another embodiment of the magnetic head device according to the present invention
FIG.

FIG. 11 is a diagram showing a configuration of a magnetic disk device incorporating a magnetic head device.

FIG. 12 is a front view of a conventional magnetic head device.

FIG. 13 is a bottom view of a conventional magnetic head device.

FIG. 14 is an enlarged side view of a conventional magnetic head device viewed from a medium outflow direction.

FIG. 15 is a view showing a conventional magnetic head device.
It is an expanded sectional view of a D line.

[Explanation of symbols]

 Reference Signs List 4 Head support device 5 Magnetic head 51 Slider 52 Magnetic transducer 53, 54 Extraction electrode 61, 62 Lead wire 601 Center conductor

Claims (2)

(57) [Scope of request for utility model registration] A magnetic head having a slider and a magnetic transducer; a head support device having the magnetic head mounted at a tip end thereof so as to allow pitch movement and roll movement of the magnetic head; A magnetic head device including a lead connected to the conversion element, wherein the slider has a thickness direction perpendicular to an air outflow direction.
A medium facing surface on the surface side, and a medium facing surface opposite to the medium facing surface.
The head support device is attached to a surface of the slider, and the magnetic transducer is provided in the air outflow direction of the slider.
Is provided at one end side of the device, and has at least a pair of extraction electrodes.
And the pair of extraction electrodes is connected to the air outflow of the slider.
On one end face in the direction
The lead wire is provided at least in pairs,
Each of the lead wires is made of a continuous wire and has a cross-sectional diameter of 15 mm.
中心 40 μm of the center conductor, and the pair of lead wires are connected to the tip of the head support device.
In the vicinity of the slider , each of the separated lead wires has one end connected to the end of the slider.
On the one end face in the air outflow direction, the air outflow
Slider width direction orthogonal to the direction and the thickness direction
From one side of the pair of extraction electrodes
And the other end of the separated lead wire is connected to the end of the slider.
On the one end face in the air outflow direction, the slider
Lead from the other side in the width direction to the other of the pair of extraction electrodes
A magnetic head device characterized by being connected and fixed . 2. The magnetic head device according to claim 1, wherein :
The head support device has a lead wire fixing portion at the tip end, and the lead wire is fixed to the lead wire fixing portion at the tip end, and the lead wire fixing portion and the magnetic field A magnetic head device separated from each of the lead wires between the conversion element and the extraction electrode.