JPH10149646A - Magnetic head assembly and magnetic disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic head assembly capable of resisting large shearing and peeling forces by an adhesive force with a small contact area and highly accurately attaching a magnetic head slider to a gimbal. SOLUTION: In a magnetic head assembly including a magnetic head slider 3 having a magnetic core and a gimbal 2 for elastically supporting the slider 3, a step having a projecting part 60 is provided in the backside of the magnetic head slider 3 opposite a magnetic disk, a hole part 210 engaged with the projecting part 60 is provided in the supporting part 21 of the gimbal 2 and, by engaging and fixing the projecting part 60 to the hole part 210, the magnetic head slider 3 is attached by being stuck to the gimbal 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head assembly for a magnetic disk drive, and more particularly to a magnetic head assembly capable of attaching a magnetic head slider to a gimbal with high precision.

[0002]

2. Description of the Related Art As shown in FIG. 9, a magnetic head assembly for a magnetic disk drive generally has a magnetic head slider 3 which aerodynamically floats with respect to a rotationally driven magnetic disk.
An electromagnetic transducer (magnetic core, not shown) for recording and reproducing data on and from the magnetic disk; a gimbal 2 for elastically supporting the magnetic head slider 3; and an electric signal from the electromagnetic transducer. Lead wire 4 for transmitting
The electromagnetic transducer is configured to record / reproduce data on / from the magnetic disk while aerodynamically levitating the magnetic head slider 3 rotatably supported by the load beam 1 above the magnetic disk. ing.

As shown in FIG. 10, the magnetic head slider 3 has an aerodynamically unstable position on the magnetic disk in a state where the gimbal 2 applies a pressing force to the back surface 6 (the back side of the magnetic disk facing surface). In order to levitate, it is elastically supported by the gimbal 2 so that the pitch rotation P and the roll rotation R can be performed according to the floating state. In FIG. 10, reference numeral 5 denotes a disk-facing surface facing the magnetic disk, reference numeral 7 denotes a side surface, reference numeral 8 denotes an air inflow end surface, and reference numeral 9 denotes an R / W on which a read / write element as an electromagnetic transducer is mounted. Element surface.

The magnetic head slider 3 according to the prior art is
As shown in FIG. 11, the gimbal 2 is bonded to the disk-facing surface via a heat or light curable adhesive 11. This bonding is performed by applying the adhesive 11 to the disk-facing surface of the gimbal 2,
This is performed while holding the attitude of the magnetic head slider 3 by a jig (not shown). Also, the lead wire 4 described above
Ultrasonic or soldering is performed without changing the attitude of the magnetic head slider 3 and without affecting the pitch rotation P and the roll rotation R.

[0005] Incidentally, as a document describing the technology related to this magnetic head assembly, for example, Japanese Patent Application Laid-Open No. Hei 3-18997
No. 6, JP-A-6-215513 and U.S. Pat. No. 5,331,489. Also, as a magnetic head assembly according to the prior art, a type called a Winchester type in which a part of a magnetic head slider penetrates the slider has been adopted, but this slider support mechanism has a projection called a dimple on the upper surface of the penetrated slider. The projections allow the roll and pitch directions to be followed.

[0006]

In recent years, the flying height of a magnetic head assembly has been reduced in order to realize a high recording density. Therefore, the sliding surface of a magnetic disk has been smoothed. For this reason, the magnetic disk and the slider are liable to stick to each other when the apparatus is stopped, and the contact surface between the magnetic head slider sliding surface and the magnetic disk sliding surface during contact start / stop (CSS) for taking off and landing of the magnetic head slider. Generates a large shear force. In recent years, magnetic head sliders have tended to be further miniaturized in response to demands for higher recording densities, and thus the joining surface between the gimbal and the magnetic head slider has become unavoidably smaller. In some magnetic head sliders, terminal pads that are electrically connected to the read / write element are arranged on the joint surface with the gimbal.

Accordingly, recent magnetic head assemblies tend to have a small joining surface with the gimbal and a small joining force, and a joining form capable of withstanding a large shearing force and a peeling force with a joining force due to a small contact area. Although necessary, the magnetic head assembly according to the prior art has a drawback that it cannot meet this demand.

Further, a magnetic head assembly according to the prior art is
Since the back surface of the magnetic head slider was bonded to the gimbal, wire bonding or gold bonding was required to conduct the terminals on this back surface to the suspension, and these bonding operations had to be performed on the back surface of the gimbal. In addition, a special jig is required, and these operations are complicated, and mass production is difficult.

In the magnetic head assembly, the gimbal rolling occurs at the time of seek acceleration, and a phenomenon that the floating surface and the disk surface partially approach each other occurs. Since the slider is attached to the side surface, the distance between the roll rotation axis and the slider floating surface is increased by the thickness of the slider, and the approach amount is increased.

An object of the present invention is to eliminate the above-mentioned disadvantages of the prior art, which can withstand a large shearing force and a peeling force with a joining force due to a small contact area, and attach a magnetic head slider to a gimbal with high precision. It is a first object to provide a magnetic head assembly capable of performing assembling work, and a second object is to provide a magnetic head assembly capable of efficiently performing an assembling operation. It is a third object of the present invention to provide a magnetic disk drive capable of reducing the size and reducing the size.

[0011]

According to a first aspect of the present invention, there is provided a magnetic head slider provided with an electromagnetic transducer and a gimbal for elastically supporting the magnetic head slider. In a magnetic head assembly for recording and reproducing data on and from a magnetic disk on which an electromagnetic transducer is rotationally driven, the magnetic head slider penetrates a rotatable support portion in the out-of-plane direction of the gimbal; The first feature is that the positioning is performed by at least two non-parallel sides.

According to a second aspect of the present invention, there is provided a magnetic head slider on which an electromagnetic transducer is mounted, and a gimbal for elastically supporting the magnetic head slider. A magnetic head assembly for recording and reproducing data by providing a step having a projecting portion on the back surface of the magnetic head slider with respect to the surface facing the magnetic disk, and forming a hole in the gimbal for fitting with the projecting portion of the magnetic head slider. A second feature is that the magnetic head slider penetrates and is fixed to at least the roll-rotatable support portion at the end of the gimbal by fitting the protrusion into the hole.

According to a third aspect of the present invention, there is provided a magnetic head assembly according to the first or second aspect, that is, a magnetic head slider penetrates a support portion rotatable in an out-of-plane direction of the gimbal,
A hole which is positioned by at least two non-parallel sides of the penetrating portion, or a step having a protrusion on the back surface of the magnetic head slider with respect to the surface facing the magnetic disk, and a hole on the gimbal for fitting the protrusion of the magnetic head slider. A magnetic head assembly for fixing a magnetic head slider by penetrating at least a roll rotatable support portion at the end of the gimbal by fixing a magnetic head slider by providing a protrusion in the hole. This is the third feature.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetic head assembly according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG.
FIGS. 3A and 3B are perspective views showing a structure and an assembled state of the magnetic head assembly according to the first embodiment of the present invention, wherein FIG. 1A shows a state in the course of assembly and FIG. FIG. FIG. 2 is a partial sectional view of FIG.

The magnetic head assembly according to the present embodiment, as shown in FIG. 1, has a hole 210 for following a roll and pitch direction operation at the tip of the gimbal 2 and for fitting a part of the magnetic head slider 3. Is provided, and the protrusion 60 of the slider 3, which is partially protruded by a step, is fitted into the hole 210 of the support 21 by penetrating upward from the surface of the support 21. As shown in FIG. 2, the magnetic head slider 3 is attached to the support 21 at the tip of the gimbal 2 by applying an adhesive 11 to a portion of the step surface of the slider 3 which is in contact with the support 21. In the bonding, a thermosetting or photocurable adhesive is applied to the step surface of the magnetic head slider 3 in advance, and in this state, the protrusion 60 of the slider 3 is inserted and fitted into the hole 210 of the gimbal 2, This is performed by curing the adhesive by heat or light, and this is the same in the embodiments described later.

The gimbal 2 has the ends of the lead wires shown in FIG. 11 wired and connected to the ends of the load beam. A core and a terminal for conducting the element to the outside are protected by a protective film such as an alumina film. Further, the terminal is connected to a lead wire by wire bonding (connection by a wire) or gold bonding (by a fine ball of gold). Connection), and these are the same in other embodiments described later.

The structure of the magnetic head assembly according to the present embodiment is such that a protrusion 6 is formed on the upper surface of the magnetic head slider 3 by a step.
0, and by fitting and bonding the protruding portion 60 to the hole 210 opened in the support portion 21 of the gimbal 2, the flatness at the time of bonding with a small bonding area can be maintained, and the firmness due to the fitting can be maintained. A good joining force can be obtained.

In this embodiment, since the protrusion 60 of the magnetic head slider 3 protrudes above the gimbal 2, the terminals of the magnetic head slider 3 can be arranged above the gimbal 2, so that the wire Connection work such as bonding or gold bonding can be easily performed. Further, the magnetic head assembly according to the present embodiment includes:
Since a part of the magnetic head slider penetrates above the gimbal 2, the distance between the roll rotation shaft (gimbal surface) and the flying surface of the slider can be shortened, and the amount of approach to the magnetic disk can be reduced.

FIGS. 3 and 4 are views for explaining a magnetic head assembly according to a second embodiment of the present invention.
FIGS. 3A and 3B are perspective views showing the structure and the assembled state of the magnetic head assembly in the same manner as in the previous embodiment, wherein FIG. 2A shows a state in the middle of assembly, and FIG. 2B shows a state after the assembly. FIG. 4 is a partial cross-sectional view of FIG.

As shown in FIG. 3, the magnetic head assembly according to the present embodiment includes a magnetic head slider 3 having a concave surface formed by a groove or a step formed in the center of the upper surface in a lateral direction;
At the tip of the gimbal 2, there is provided a support portion 22 which follows the roll and pitch direction operations and has two holes 221 opened for fitting the concave portion of the magnetic head slider 3,
The slider 3 projecting concavely into the hole 221 of the support portion 22
The two protruding portions 60 are penetrated upward from the surface of the support portion 22 and fitted to each other, and as shown in FIG.
The magnetic head slider 3 is attached to the support portion 22 at the tip of the gimbal 2 by applying an adhesive 11 to a groove portion in contact with the gimbal 2.

In the structure of the magnetic head assembly according to the present embodiment, two protrusions 60 are provided on the upper surface of the magnetic head slider 3 in a concave shape, and the protrusions 60 are provided on the support portion 22 of the gimbal 2.
By fitting and adhering to the two holes 221 opened at the same time, the flatness at the time of adhering with a small adhering area can be maintained, and in addition to the effect of the above-described embodiment, in particular, robustness due to the adhering at two places A good joining force can be obtained.

FIGS. 5 and 6 are views for explaining a magnetic head assembly according to a third embodiment of the present invention.
FIGS. 3A and 3B are perspective views showing the structure and the assembled state of the magnetic head assembly in the same manner as in the previous embodiment, wherein FIG. 2A shows a state in the middle of assembly, and FIG. 2B shows a state after the assembly. FIG. 6 is a partial sectional view of FIG.

The magnetic head assembly according to the present embodiment differs from the above-described embodiment in that the magnetic head slider 3 is arranged upward, that is, the air bearing surface (disc facing surface 5) is arranged upward in the drawing. 3 is a structure in which the air bearing surface side of the gimbal 2 is fitted and bonded upward from below. The magnetic head assembly according to the present embodiment is used when a magnetic disk is positioned upward.

As shown in FIG. 5, the magnetic head assembly has two side rails on the floating surface (disc-facing surface 5) of the magnetic head slider 3, a space between the rails, an electromagnetic transducer (magnetic core) and terminals. Excluding the part, specifically, FIG. 5
(A) between the side rails at the air inflow end on the left side of the slider,
A groove is formed on both sides of the right air outflow end by a step, and is engaged with the groove on the air bearing surface (disc facing surface 5) of the magnetic head slider 3 and penetrates two side rails and the like. 23 having a hole 231 opened in
The two side rails of the slider 3 are fitted into the holes 231 of the support portion 23 so as to penetrate upward from the surface of the support portion 23, and as shown in FIG.
The adhesive 11 is applied to the groove portion (the groove portion between the side rails at the air inflow end on the left side in FIG. 6 and the groove portion on both sides at the air outflow end on the right side in FIG. 6) so that the magnetic head slider 3 is gimbaled. 2.

The structure of the magnetic head assembly according to the present embodiment is such that a groove is provided on the air bearing surface side of the magnetic head slider 3 and the slider 3 is fitted into a hole 231 which fits into the groove and passes through a side rail or the like. Bonding together is effective when there is a restriction in the direction of the assembly process.

FIGS. 7 and 8 are views for explaining a magnetic head assembly according to a fourth embodiment of the present invention.
FIGS. 3A and 3B are perspective views showing the structure and the assembled state of the magnetic head assembly in the same manner as in the previous embodiment, wherein FIG. 2A shows a state in the middle of assembly, and FIG. 2B shows a state after the assembly. FIG. 8 is a partial sectional view of FIG.

In the magnetic head assembly according to the present embodiment, the magnetic head assembly is placed between the upper and lower magnetic disks.
It provides a form suitable for placement in the direction,
7 and 8 show an example in which a magnetic disk is arranged below the gimbal 2. FIG.

The magnetic head assembly according to this embodiment is
As shown in FIG. 7, a groove 3b is provided which traverses the upper side surface of the magnetic head slider 6 in the vertical direction, and the tip of the gimbal 2 follows the roll and pitch operation, and the magnetic head slider 3 projects by the groove 3b. A support portion 25 having a rectangular hole 251 for fitting the portion 60 is provided, and the protrusion 6 of the slider 3 is inserted into the hole 251 of the support portion 25.
0 and the magnetic head slider 3
Is attached to the gimbal 2. Therefore, in this magnetic head assembly, only the right side of the slider 3 in the drawing protrudes from the support portion 25 of the gimbal 2.

On the other hand, in a magnetic head assembly (not shown) disposed above the magnetic disk, the protrusion of the magnetic head slider has a shape in which the left side of the slider 3 protrudes downward from the gimbal and conforms to this shape. To open the hole of the support portion, and the protruding portion is fitted and adhered to the hole.

In the pair of magnetic head assemblies according to the present embodiment, the upper and lower gimbal positions can be made close to each other by disposing the positions of the projecting portions from the slider in the vertical direction to the left and right, so that the magnetic disk can be moved closer. The spacing between them can be reduced. That is, it is possible to contribute to thinning of a magnetic disk device in recent years.

As described above, since the magnetic head assembly according to each of the above embodiments is configured such that a part of the magnetic head slider penetrates and fits into the support portion of the gimbal, a large shearing force and peeling can be achieved with a small joint area. Can withstand the power. Further, since the bonding area of the adhesive can be reduced, the magnetic head slider can be attached to the gimbal with high accuracy. Further, since the slider penetrates the gimbal and is exposed on the upper surface of the gimbal, the work of assembling the magnetic head slider, particularly the connection work of the terminals, can be efficiently performed, and the distance between the roll rotation shaft and the slider floating surface can be shortened. The amount of approach can be reduced.

In the magnetic head assembly according to each of the above embodiments, an example has been described in which a part of the slider penetrates a part of the gimbal. However, the present invention is not limited to this. The magnetic head slider may be mounted on the gimbal by inserting and bonding or crimping the groove from a lateral direction to a part of the gimbal through the hole, and the gimbal may have the same diameter as the slider outer diameter. A hole having a dimension may be provided, and all the sliders may be fitted into the hole. Furthermore, in each of the above embodiments, an example in which an adhesive is used for joining the slider and the gimbal has been described. However, the present invention is not limited to this, and fixing or shrink fitting only by fitting may be used. The connection between the terminal of the electromagnetic transducer of the magnetic head slider and the lead wire may be performed by crimping.

[0033]

As described above, according to the present invention, the magnetic head slider penetrates at least the rotatable support portion at the tip of the gimbal, and at least the non-parallel portion of the penetrating portion is provided.
By positioning and fixing by the side, it is possible to withstand a large shearing force and a peeling force with a joining force due to a small contact area, and to attach the magnetic head slider to the gimbal with high precision. Also, since the slider penetrates the gimbal and is exposed upward, the work of assembling the magnetic head slider, especially the connection of the terminals, can be performed efficiently, and the distance between the roll rotation axis and the slider floating surface is shortened and approached. The amount can be reduced.

Further, according to the present invention, a step having a projecting portion is provided on the back surface of the magnetic head slider opposite to the surface facing the magnetic disk, and the projecting portion of the step of the magnetic head slider is provided on at least a rotatable support portion at the tip of the gimbal. By providing a hole to be fitted and fitting the protrusion into the hole, it is possible to withstand a large shearing force and a peeling force with a joining force due to a small contact area, and to attach the slider to the gimbal with high precision. be able to. In addition, the assembling work and the connecting work of the magnetic head slider can be efficiently performed by the fitting, and the distance between the roll rotating shaft and the flying surface of the slider can be shortened to reduce the approach amount due to the rotation in the roll direction. it can. Further, according to the present invention, by applying the magnetic head assembly to a magnetic disk device, the space between a plurality of magnetic disks in the magnetic disk device can be reduced, and the device can be downsized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure and an assembled state of a magnetic head assembly according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view of FIG.

FIG. 3 is a diagram showing a structure and an assembled state of a magnetic head assembly according to a second embodiment of the present invention.

FIG. 4 is a partial sectional view of FIG. 3;

FIG. 5 is a diagram showing a structure and an assembled state of a magnetic head assembly according to a third embodiment of the present invention.

FIG. 6 is a partial sectional view of FIG. 5;

FIG. 7 is a view showing a structure and an assembled state of a magnetic head assembly according to a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a structure and an assembled state of a magnetic head assembly according to a fifth embodiment of the present invention.

FIG. 9 is a view for explaining the structure of a magnetic head assembly according to the related art.

FIG. 10 is a view for explaining a magnetic head slider.

FIG. 11 is a diagram showing a joint state between a magnetic head slider and a gimbal according to the related art.

[Explanation of symbols]

1: load beam, 2: gimbal, 3: magnetic head slider, 3a, 3b: groove, 4: lead wire, 5: slider disk facing surface, 6: slider back surface, 7: slider side surface, 8: slider 9: air outflow end surface of slider, 10: slider disk facing surface, 11: adhesive, 12: gimbal back surface, 21, 22, 23, 24,
25: support part, 210, 221, 231, 241, 25
1: hole, 242: beam, 60: protrusion.

Claims (3)

[Claims] 1. A magnetic head slider having an electromagnetic transducer mounted thereon and a gimbal for elastically supporting the magnetic head slider, and recording and reproducing data on and from a magnetic disk on which the electromagnetic transducer is driven to rotate. A magnetic head assembly, wherein the magnetic head slider penetrates a rotatable support portion in an out-of-plane direction of the gimbal, and is positioned by at least two non-parallel sides of the penetrating portion. 2. A magnetic head slider having an electromagnetic transducer mounted thereon and a gimbal for elastically supporting the magnetic head slider, for recording and reproducing data on and from a magnetic disk on which the electromagnetic transducer is rotationally driven. In the magnetic head assembly, a step having a protruding portion is provided on the back surface of the magnetic head slider opposite to the surface facing the magnetic disk, and a hole is provided on the gimbal for fitting with the protruding portion of the magnetic head slider. A magnetic head assembly characterized in that the magnetic head slider penetrates and is fixed to at least the rotatable support part at the tip of the gimbal by fitting the parts. 3. A magnetic disk drive on which the magnetic head assembly according to claim 1 is mounted.