JPH03248308A - Magnetic head device - Google Patents

Abstract

PURPOSE:To miniaturize a thin film magnetic head by reducing the area of an end face having a thin film magnetic conversion element by deriving the takeoff electrode of the thin film magnetic conversion element to a plane at a side opposite to the medium confronting plane of a slider. CONSTITUTION:A head supporting device 6 is mounted on the plane 102 at the side opposite to the medium confronting plane 101 of the slider 1 so as to permit the rolling motion and pitching motion of the thin film magnetic head. The thin film magnetic conversion element 2 is attached on the end face 103 which becomes an outflow terminal part against an air current flowing in a direction of arrow head (a) in combination with a magnetic recording medium. The take-off electrodes 3, 4 of the thin film magnetic conversion element 2 are derived to the plane 102 opposite to the medium confronting plane 101 of the slider 1. In such a way, it is possible to realize miniaturization without receiving limitation due to the area of the take off electrode, and to obtain a miniaturized magnetic head with high density recording and traceability, and fitted in fast access.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a magnetic head device having a thin film magnetic head and a head support device, in which an extraction electrode of a thin film magnetic transducer element of the thin film magnetic head is connected to the medium facing surface of a slider. By leading out the lead conductor to the side opposite to the lead conductor, the thin film magnetic head can be made smaller without being relatively limited by the area of the lead electrode, and it is easy to connect the lead conductor to the lead electrode, allowing the thin film magnetic head to be connected from the lead conductor to the lead conductor. It is possible to provide a magnetic head device which can ensure stable flying characteristics and electromagnetic conversion characteristics with a small external force applied to the magnetic head.

<Prior Art> In this type of magnetic head device, in order for the thin film magnetic head to closely follow the magnetic disk surface at regular intervals, the slider constituting the thin film magnetic head must first It is required to perform a pitch motion about an axis, a roll motion about a second axis perpendicular to the first axis, and to eliminate yawing. Such a magnetic head device is known from Japanese Patent Publication No. 58-22827 and Japanese Patent Application Laid-open No. 61-93868.

The general structure of the head support device disclosed in these prior art is that a support body having an elastic spring part and a rigid beam part continuous to the elastic spring part is formed of an elastic metal plate such as stainless steel. A flexible body made of a stainless steel elastic metal plate is attached to the free end of the support, and the load projection provided on either the top surface of the flexible body or the bottom surface near the free end of the support The structure was such that a load force was transmitted from the free end of the head to the flexible body, and a thin film magnetic head, in which a slider carried a thin film magnetic transducer element, was attached to the lower surface of the flexible body.

As a thin film magnetic head combined with a head support device,
A floating thin film magnetic head is used that uses dynamic pressure generated by the movement of the magnetic recording medium to fly while maintaining a small air-hair ring gap between itself and the magnetic recording medium.

Such a floating type thin film magnetic head was developed, for example, by the
It is known from Japanese Patent Publication No. 8-21329 and Japanese Patent Publication No. 58-28650, etc., and its basic configuration is a thin film magnetic converter on the air outflow end side of a slider that has an air bearing surface on the side facing the magnetic recording medium. It has a structure that includes elements. The thin film magnetic transducer is a thin film magnetic transducer that is formed using a process similar to IC manufacturing technology, and is attached to the air outflow end side opposite to the tapered portion.

This type of thin film magnetic head is becoming increasingly smaller in order to cope with higher density and higher speed magnetic recording. Miniaturization is effective in reducing the flying height and spacing loss necessary to achieve high-density recording, and in combination with a gimbal, it is effective in increasing the resonance frequency, preventing crashes and improving durability. Moreover, it is possible to maintain an appropriate balance between dynamic pressure and support spring pressure, maintain a good flight attitude, and obtain stable flying characteristics.

Furthermore, the reduction in mass of the head due to miniaturization results in faster access movements of the arm supporting the gimbal.

However, the conventional floating Fit@magnetic head has a complicated structure having a rail portion and a tapered portion on the medium facing surface side, and there is a limit to miniaturization. As a means to solve this problem, for example, Japanese Patent Application Laid-Open No. 64-84486 discloses a thin film magnetic head in which the medium facing surface of the slider is flat without a rail portion. FIG. 13 is a perspective view of such a thin film magnetic head, in which 1 is a slider, 2 is a thin film magnetic transducer element 1, 3, and 4 is an extraction electrode.

The slider 1 has a medium facing surface 101 that is flat without a rail portion or a tapered surface, and the entire surface 101 functions as an ABS surface.

The thin film magnetic transducer 2 is attached to the end surface that is the air outflow end side in combination with a magnetic recording medium. There is only one thin film magnetic transducer element 2, and it is arranged approximately in the middle in the width direction.

The extraction electrodes 3.4 are connected to both ends of a conductive coil film that together with the magnetic film constitutes a magnetic circuit.

When used as a magnetic head device, the medium facing surface 10
The surface 102 on the opposite side from 1 is glued to a gimbal-type head support device (not shown), and the medium facing surface 101 is brought into spring contact with the surface of the magnetic disk, and the so-called contact l-start is started and stopped in this state. , driven by stop method. When the magnetic disk is stationary, the medium facing surface 101 is pressed against the surface of the magnetic disk by the spring pressure of the head support device, but when the magnetic disk rotates, lift dynamic pressure is applied to the medium facing surface 101 of the slider 1. is generated, and the head operates with an amount of float that balances this dynamic pressure with the spring pressure of the head support device.

In the thin film magnetic head shown in FIG. 13, since the medium facing surface 101 of the slider 1 has a simple planar shape without a rail portion, it can be easily miniaturized, and the above-mentioned advantages of miniaturization can be secured.

<Problems to be Solved by the Invention> However, the magnetic head device using the conventional thin-film magnetic head described above has the following problems.

(A) Since the thin film magnetic transducer 2 and its extraction electrode 3.4 are arranged on the same end face 103 side, the area of the end face 103 depends on the area required for the thin film magnetic transducer 2 and its extraction electrode 3.4. Due to these restrictions, there are limits to miniaturization.

(B) The lead conductor of the read/write circuit to be electrically connected to the extraction electrode 3.4 of the thin film magnetic head 2 is supported and guided by a head support device attached to the surface 102 opposite to the medium facing surface 101.

Therefore, when connecting the lead conductor to the extraction electrode 3.4, it is necessary to bend the lead conductor from the surface 102 to the surface 103, which makes the connection work troublesome.
Due to the bending of the lead conductor, an extra external force is applied to the head, which may adversely affect the flying characteristics.

(C) Under the influence of processing distortion of the slider 1, the medium facing surface 101 may become convex at both ends in the width direction and concave at the middle, as shown exaggeratedly in FIG. When the medium facing surface 101 has such a shape, when used in combination with a magnetic disk, head touch becomes poor, spacing loss increases, head crashes tend to occur, and durability decreases.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and to make it possible to miniaturize a thin film magnetic head without being relatively limited by the area of the lead-out electrode, to easily connect the lead conductor to the lead-out electrode, and to It is an object of the present invention to provide a magnetic head device which can ensure stable flying characteristics and electromagnetic conversion characteristics with a small external force applied from a conductor to a thin film magnetic head.
Means for Solving the Problems> In order to solve the above problems, a magnetic head device according to the present invention includes a thin film magnetic head and a head support device, the thin film magnetic head comprising: A thin film magnetic transducer is provided on the end face of the slider, and the thin film magnetic transducer has an extraction electrode conductively connected to a conductive coil film that constitutes a magnetic circuit together with the magnetic film, and the extraction N8i is connected to the It is characterized by being led out on the surface of the slider opposite to the medium facing surface.

Furthermore, the slider is characterized in that the slider has a concave groove along the air flow direction on the surface opposite to the medium facing surface.

Effect> Since the extraction electrode of the thin-film magnetic transducer is led out to the surface of the slider opposite to the medium facing surface, the area of the end face having the thin-film magnetic transduction element is not too limited by the area of the extraction electrode. This allows the thin film magnetic head to be made smaller.

Further, since the surface from which the lead-out electrode is led out coincides with the mounting surface of the head support device under normal conditions, the work of attaching the lead conductor to the lead-out electrode is facilitated. Moreover, since bending of the lead conductor is not necessary when attaching the conductor to the lead-out electrode, the external force applied from the lead conductor to the thin-film magnetic head is reduced.

The slider can also have grooves along the air flow direction on the surface opposite to the medium facing surface. In this case, the medium facing surface of the slider becomes a convex curved surface due to the effect of the groove. Therefore, a thin film magnetic head with good head touch, small spacing loss, and high durability that is resistant to head crashes and the like can be obtained.

Furthermore, if a groove is provided on the surface of the slider that faces the medium facing surface, the head support device can be positioned and set using this groove. Therefore, even when downsized, the head support device can be easily attached and connected.

<Embodiment> FIG. 1 is a perspective view of a magnetic head device according to the present invention, and FIG. 2 is a front view thereof. 5 is a Fii film magnetic head, and 6 is a head support device. The head support device 6 is attached to the surface 102 of the slider 1 opposite to the medium facing surface 101 so as to allow the thin film magnetic head 5 to perform roll and pitch movements.

The thin film magnetic head 5 includes a thin film magnetic transducer element 2 on an end surface 103 of the slider 1. Figure 3 shows the thin film magnetic herad 5.
, in which the thin film magnetic transducer 2 is attached to an end surface 103 that is on the outflow end side with respect to the airflow flowing in the direction of arrow a when combined with a magnetic recording medium. In the embodiment, there is one thin film magnetic transducer element 2, and it is arranged approximately in the middle in the width direction, but it may be arranged closer to either side.

The extraction electrode 3.4 of the thin film magnetic transducer 2 is led out to a surface 102 of the slider 1 on the side opposite to the medium facing surface 101. The extraction chamber 8i3.4 is formed as a plating film so that the area of the end surface exposed to the surface 102 is the area necessary for connecting the lead conductor. The medium facing surface 10 has a planar shape without a rail portion or a tapered surface. The edges (a) and (b) of the medium facing surface 101 viewed in the air outflow direction a are desirably formed in an arc shape in order to avoid catching on the surface of the magnetic disk at the time of contact and start. (see figure). The other edges (c) and (d) can also be formed into arc shapes.

The extraction electrode 3.4 of the thin film magnetic transducer 2 is connected to the medium facing surface 1.
When led out to the surface 102 opposite to 01, the extraction electrode 3
．． 4 is the end face 103 to which the thin film magnetic transducer 2 is attached.
Unlike the conventional technology, the area of the end face 103 to which the thin film magnetic transducer 2 is attached can be reduced, and the entire thin film magnetic head can be miniaturized. Specifically, the size of the slider 1 is such that the thickness Ho from the medium facing surface 101 to the opposite surface 102 is 0.65 mm or less, and the length Ll in the air outflow direction is 0.
．． 5mm to 2mm, width W in the direction perpendicular to the air outflow direction
It is easy to reduce the size so that I is about 0.5 mm to 2 mm (see FIG. 3).

The thin film magnetic conversion element 2 is a thin film element formed according to a process similar to RC manufacturing technology. FIG. 4 is an enlarged perspective view centered on the thin film magnetic transducer 2, and FIG. 5 is an enlarged sectional view thereof. In the figure, 21 is a lower magnetic film, 22 is a gap film made of alumina, etc., 23 is an upper magnetic film, 24 is a conductive coil film, 25 is an insulating film made of organic resin such as novolac resin, and 26.27 are leads. The electrode 28 is a protective film.

The tip portions of the lower magnetic film 21 and the upper magnetic M23 are formed into ball portions 211 .
231, reading and writing are performed in the conversion gap formed in the ball portion 211.231, 212.2
32 is a yoke portion, which is connected to each other at a back gap portion on the opposite side from the ball portions 211 and 231.

The insulating film 25 is composed of multiple layers of insulating films 251 to 253, and the yoke portion 21 is formed on the insulating films 251 and 252.
The conductor coil film 24 is formed so as to spiral around the back gap portion of 2.232. As a result, a magnetic circuit is formed by the lower magnetic film 21, the upper magnetic film 23, and the conductor coil film 24.

The lead electrodes 26 and 27 have one end electrically connected to both ends of the conductive coil film 24, and have a lead electrode 3.4 formed on the other end.

Next, the head support device 6 includes a flexible body 61, head support arms 62, 63, a load arm 64, a mounting piece 65, and the like. However, the head support device 6 is
It is also possible to adopt a structure known from Japanese Patent No. 7, Japanese Patent Application Laid-Open No. 61-93868, and the like. The flexible body 61 is formed into a plate shape from a polymer resin which is an insulating material, and lead conductors 66 and 67 guided to an external read/write circuit are buried inside the flexible body 61 . As the polymer resin constituting the flexible body 61, a polymer material having mechanical strength capable of withstanding repeated bending and exhibiting appropriate springiness, twisting and elongation, such as polyimide resin, is suitable.

The head support arms 62 , 63 are formed continuously from the flexible body 61 . Lead conductors 66.67 are embedded in the head support arms 62.63.
The ends of the head support arms 62 and 63 are led out from the tips of the head support arms 62 and 63.

The attachment piece 65 is made of a rigid member such as metal, and is integrally attached to the other end of the flexible body 61 by adhesive or other means. The load arm 64 extends from the mounting piece 65 over the flexible body 61 and onto the surface 102 of the thin film magnetic head 5 .

When combining the thin film magnetic head 5 and the head support device 6, head support arms 62 and 63 are provided on the surface 102 of the slider 1.
are attached by adhesive or other means, and lead conductors 66, 67 protruding from the tips of the head support arms 62, 63.
Connect it to the extraction electrode 3.4 by soldering or other means,
The tip 641 of the load arm 64 is placed on the surface 102 of the slider 1. The tip end 641 of the load arm 64 is connected to the surface 1 of the slider 1.
02 and applies a downward load to the thin film magnetic head 5.

The flexible body 61 shown in the embodiment is made of polymer resin such as polyimide resin, so it has weaker springiness and a higher degree of freedom in twisting and stretching than conventional elastic metal plates such as stainless steel. A flexible body 61 is obtained. Therefore, even when the thin-film magnetic head 7 is downsized to reduce its flying height and the magnetic recording density is increased, the balance between the lift dynamic pressure generated in the slider 1 and the springiness of the flexible body 61 is not maintained. , and a stable posture control effect can be obtained. Furthermore, since the flexible body 61 is made of polymer resin, processing becomes easy.

Since the lead conductors 66 and 67 can be connected to the extraction electrodes 3 and 4 on the surface 102 on which the head support device 6 is attached, the work is facilitated. Furthermore, when bending the lead conductor 66.67 to the extraction electrode 3.4, there is no need to bend the lead conductor 66.67, so the external force applied from the lead conductor 66.67 to the thin film magnetic head 5 is small. Become. Therefore, stable flying characteristics and electromagnetic conversion characteristics can be obtained.

6 is a perspective view of another embodiment of the magnetic head device according to the present invention, FIG. 7 is a front view thereof, and FIG. 8 is a perspective view of another embodiment of the magnetic head device according to the present invention.
FIG. 8 is a perspective view of a thin film magnetic head 5 constituting the magnetic head device shown in FIGS.

In the figures, the same reference numerals as in FIGS. 1 to 3 indicate the same components. The thin film magnetic head 5 has a groove 104 in the form of a strip extending along the length in the middle part in the width direction on the surface 102 of the slider 1 opposite to the medium facing surface 101.
is provided. It is desirable that the groove 104 be formed over the entire length of the slider 1 as an arcuate groove or an angular groove. A tip 641 of the load arm 64 is positioned within a groove 104 formed in the surface 102. In the case of this embodiment, it goes without saying that the same effects as the embodiment shown in FIG. The advantage is that the head support device 6 can be easily attached.

Furthermore, when the groove 104 is present, the medium facing surface 1 of the slider 1
01 is the highest at the middle part in the width direction where the thin film magnetic transducer element 2 is located, and is a convex curved surface that gradually slopes toward both edges in the width direction. Therefore, the concave surface of the medium facing surface 101 of the slider 1 caused by processing distortion etc. is corrected, and a highly durable magnetic head device with good head touch, small spacing loss, and less likelihood of head crash etc. can be obtained. .

9 is a perspective view of another embodiment of the magnetic head device according to the present invention, FIG. 10 is a front view thereof, and FIG. 11 is a thin film magnetic head constituting the magnetic head device of FIGS. 9 and 10. 5 is a perspective view of FIG. In the figure, Figures 1 to 3
The same reference numerals as in the figures and FIGS. 6 to 8 indicate the same components. The thin film magnetic head 5 has a groove 104.10 in the form of a strip extending in the length direction on the surface 102 of the slider 1 opposite to the medium facing surface 101 at the position of the extraction electrode 3.4.
5 is provided. The head support device 6 has lead conductors 66 and 67 drawn out in parallel from the flexible body 61, and these lead conductors 66 and 67 are connected to the grooves 104 and 105 of the thin film magnetic head 5 by adhesive or other means. At the same time, the ends of the lead conductors 66, 67 are electrically connected to the extraction electrode 3.4, and the lead conductors 66, 67 are used as head support arms. Also in this example,
The same effects as the embodiments shown in FIGS. 6 to 8 can be obtained.

FIG. 12 is a diagram showing the configuration of a magnetic disk device using the magnetic head device shown in each of the above embodiments, where 7 is a magnetic disk and 8 is a positioning mechanism. The magnetic disk 7 is rotationally driven in the direction of arrow a by a rotational drive mechanism (not shown). The thin film magnetic head 5 and head support device 6 that constitute the magnetic head device are driven by a positioning mechanism 8 linearly or at a predetermined rotation angle in the direction of arrow b1 or b2. As a result, magnetic recording and reading are performed on predetermined tracks on the magnetic disk 7.

In each of the above embodiments, a thin film magnetic head for in-plane recording/reproduction is shown, but a thin film magnetic head for perpendicular magnetic recording/reproduction may also be used.
The present invention is applicable. Furthermore, the present invention is applicable not only to the two-terminal thin film magnetic head shown in the embodiment but also to a three-terminal thin film magnetic head having a center tap.

<Effects of the Invention> As described above, according to the present invention, the following effects can be obtained.

(a) Since the extraction electrode of the thin-film magnetic transducer is led out to the surface of the slider opposite to the medium facing surface, it can be miniaturized without being too limited by the area of the extraction electrode.
A magnetic head device having a small thin-film magnetic head suitable for high-density recording, high-speed tracking, and high-speed access can be provided.

(b) It is easy to connect the lead conductor to the extraction electrode, there is almost no need to bend the lead conductor when attaching the lead conductor to the extraction electrode, and the external force applied from the lead conductor to the thin-film magnetic head is small; A magnetic head device that can exhibit stable electromagnetic conversion characteristics and flying characteristics can be provided.

(C) By providing a concave groove along the air flow direction on the surface opposite to the medium facing surface of the slider, the medium facing surface of the slider is made into a convex curved surface, resulting in good head touch and reduced spacing loss. It is possible to provide a small, highly durable magnetic head device that is less prone to head crashes.

(By providing the concave grooves on the surface of the d slider that faces the medium, it is possible to provide a magnetic head device to which a head support device can be easily attached even when downsized.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of a thin film magnetic head according to the present invention, and FIG. 5 is an enlarged sectional view thereof, FIG. 6 is a perspective view of another embodiment of the magnetic head device according to the present invention, FIG. 7 is a front view thereof, and FIG. 8 is FIG. and FIG. 7 is a perspective view of a thin film magnetic head constituting the magnetic head device, FIG. 9 is a perspective view of another embodiment of the magnetic head device according to the present invention, FIG. 10 is a front view thereof, and FIG. is a perspective view of the thin film magnetic head 5 constituting the magnetic head device of FIGS. 9 and 10, and FIG. 12 is a diagram showing the configuration of a magnetic disk device using the magnetic head device shown in each of the above embodiments. FIG. 13 is a perspective view of a thin film magnetic head used in a conventional magnetic head device, and FIG. 14 is a diagram showing problems with the conventional thin film magnetic head. 1... Slider 2... Thin film magnetic conversion element 101.
...Medium facing surface 102 ... Surface facing the medium facing surface 104 ... Groove 3.4 ... Extraction electrode 5 ... Thin film magnetic head 6 ... Head support device No. 8 (Fig. 10) Figure 1 Figure 12

Claims (3)

[Claims] (1) A magnetic head device including a thin-film magnetic head and a head support device, wherein the thin-film magnetic head includes a thin-film magnetic transducer on an end face of a slider, and the thin-film magnetic transducer includes a magnetic film as well as a thin-film magnetic transducer. A magnetic head comprising an extraction electrode conductively connected to a conductive coil film constituting a magnetic circuit, the extraction electrode being led out to a surface of the slider opposite to a medium facing surface. Device. (2) The head support device includes a flexible body, a support arm, and a load arm, and the support arm is integrated with the flexible body and is connected to the medium facing surface of the thin film magnetic head. is joined to the surface on the opposite side, and the load arm applies a load to the surface on the opposite side to the medium facing surface of the thin film magnetic head. head device. (3) The flexible body is made of polymer resin. The magnetic head device according to claim 2, characterized in that: