JPH1021663A - Magnetic head assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the fly height of a magnetic head slider while ensuring effective electrical conduction between the magnetic head slider and a ginbal spring. SOLUTION: The magnetic head assembly is provided with a magnetic head slider 1 having a magnetic head 1B for reading/writing information recorded on a magnetic recording medium, and a ginbal spring 2 having a slider mounting part 2A for holding the oscillatory magnetic head slider 1, and a load spring 3 for holding the ginbal spring 2. A protrusion 1A is formed on the side of abutting face of the magnetic head slider 1 on the ginbal spring 2 so that the forward end of the protrusion 1A touches the load spring 3 directly.

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, and more particularly, to a magnetic head assembly used for a hard disk drive or the like.

[0002]

2. Description of the Related Art Conventionally, a magnetic head assembly 50 of this type is known.
As shown in FIG. 2, a magnetic head slider 51 having a magnetic head (not shown) and a magnetic head slider 5
A gimbal spring 52 having a slider mounting portion 52A for swingably holding the gimbal spring 5;
2 is provided.

At a position corresponding to the slider mounting portion 52A of the gimbal spring 52 in the load spring 53, a projection 5 is formed upward (toward the magnetic recording medium).
3A are formed, and the magnetic head slider 51 can swing freely around the protrusion 53A via the slider mounting portion 52A.

A magnetic head slider 51 is provided with a thermosetting or UV-curable adhesive 5 on a gimbal spring 52.
4 attached. At this time, the adhesive 54
A conductive adhesive 55 is separately used in combination with the magnetic head slider 51 and the gimbal spring 52, and the magnetic head slider 51 is provided on the main body side of the magnetic head device via the gimbal spring 52 and the load spring 53. Electrical continuity is achieved. That is, due to the electrical conduction, the occurrence of noise that causes an error in reading and writing is suppressed.

FIG. 3 shows a state in which a magnetic head slider 51, a gimbal spring 52 and a load spring 53 are held by a jig 60 for positioning during assembly.

As shown in FIG. 3, a jig 60 is provided with a positioning pin 61 for a gimbal spring 52, a positioning pin 62 for a load spring 53, and a positioning member 63 for a magnetic head slider 51. Thus, relative positioning of each part of the magnetic head assembly 60 is performed.

[0007]

However, recent magnetic head sliders tend to be very small,
Since the area of application of the conductive adhesive is also small, it has become difficult to achieve electrical conduction between the magnetic head slider and the gimbal spring by the conductive adhesive as described above.

Further, in order to perform relative positioning of the magnetic head slider, the gimbal spring and the load spring based on mechanical dimensional accuracy using a jig, the slider mounting portion is pressed by a projection formed on the load spring. There has been a problem that the position varies, and as a result, the flying height of the magnetic head slider also varies.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to remedy the disadvantages of the prior art, and in particular, to make the electrical conduction between the magnetic head slider and the gimbal spring effective and to stabilize the flying height of the magnetic head slider. And

[0010]

According to the first aspect of the present invention, a magnetic head slider having a magnetic head for reading or writing recorded information from a magnetic recording medium, and the magnetic head slider is swingably held. In a magnetic head assembly including a gimbal spring having a slider mounting portion and a load spring holding the gimbal spring, a protrusion is formed on a contact surface side of the magnetic head slider with the gimbal spring, and the protrusion is provided. The configuration is such that the tip of the is directly in contact with the load spring.

In this configuration, when the magnetic head slider is mounted on the slider mounting portion of the gimbal spring, and the gimbal spring is mounted on the load spring, the tip of the projection provided on the magnetic head slider becomes
The magnetic head slider comes into contact with the load spring in a pressed state, and is directly electrically connected between the magnetic head slider and the load spring.

When reading or writing recorded information from the magnetic recording medium, the magnetic head slider swings around the projection in the floating state to follow the surface of the magnetic recording medium.

According to a second aspect of the present invention, there is provided a through hole which has the same configuration as the first aspect of the invention and allows the projection to be freely inserted into a position corresponding to the projection in the slider mounting portion of the gimbal spring. Is provided, and the protrusion is made to protrude more than at least the thickness of the gimbal spring.

With this configuration, the same operation as that of the first aspect of the invention is performed, and at the time of assembly, the protrusion of the magnetic head slider is inserted into a through hole provided in the slider mounting portion of the gimbal spring. The protrusion contacts the load spring.

The third aspect of the present invention has the same configuration as that of the first or second aspect of the present invention, and employs a configuration in which the protrusion is formed by a photolithography method and an ion etching method.

In such a configuration, at the time of forming the magnetic head slider, a predetermined position is covered by photolithography, and the remaining portion is cut by ion etching. As a result, the same operation as that of the first or second aspect of the invention is performed using the magnetic head slider on which the protrusion is formed.

[0017]

FIG. 1 shows an embodiment of the present invention.
It will be described based on. This embodiment shows a magnetic head assembly 10 provided in a magnetic disk drive.

Referring to FIG. 1, a magnetic head assembly 10 includes a magnetic head slider 1 having a magnetic head 1B for reading or writing recorded information from a magnetic recording medium, and the magnetic head slider 1 is swingable. A gimbal spring 2 having a slider mounting portion 2A for holding the gimbal spring;
And a load spring 3 for holding the gimbal spring 2.

The magnetic head slider 1 has conductivity, and is provided with a magnetic head 1B on the front side.
And the upper surface (the surface facing the gimbal spring 2)
A projection 1A is formed at a preset position. When the magnetic head slider 1 is formed, a predetermined position is covered by photolithography, and the protrusion 1A is formed in a cylindrical shape by shaving off the remaining portion by ion etching.

The magnetic head slider 1 is mounted on a gimbal spring 2. The gimbal spring 2 is a plate-like member made of a long conductive material, and has a slider mounting portion 2A for mounting the magnetic head slider 1 on its front end portion, and its rear end portion is welded to the load spring 3 by welding. Fixedly equipped. That is, a U-shaped through hole having an opening directed toward the distal end is provided at the distal end of the gimbal spring 2, and the remaining portion inside the U-shaped through hole is used for mounting the slider. 2A.

At a position corresponding to the protrusion 1A of the magnetic head slider 1 in the slider mounting portion 2A, a through hole 2B somewhat larger than the protrusion 1A is provided.
With the protrusion 1A inserted through the through-hole 2B, the magnetic head slider 1 is attached to the slider mounting portion 2A via an adhesive.
Adhered to. Here, since the protrusion 1A protrudes beyond the thickness of the gimbal spring 2, even when the magnetic head slider 1 is mounted, the state of protruding from the through hole 2B is maintained.

As described above, the gimbal spring 2
The rear end is fixedly mounted on the load spring 3. This road spring 3 is a gimbal spring 2
Is a plate-like member having a long conductivity, the tip of which extends to a position where the through hole 2B of the gimbal spring 2 is formed, and the rear end of which is the same as the magnetic head assembly 10. It is connected to a rotating arm (not shown) of the magnetic disk device to be mounted.

With the above configuration, when the magnetic head assembly 10 is assembled, the protrusion 1A formed on the magnetic head slider 1 is connected to the load spring 3 via the through hole 2B of the gimbal spring 2. It comes into direct contact with the tip. At this time, since the magnetic head slider 1 is held by the gimbal spring 2, the protrusion 1A comes into contact with the load spring 3 with a predetermined pressing force due to elasticity around the slider mounting portion 2A.
Similarly, the distal end of the load spring 3 also presses the projection 1A in the opposite direction with a predetermined load.

Next, the operation of the present embodiment will be described with reference to FIG.

In this configuration, the magnetic head slider 1 is mounted on the slider mounting portion 2A of the gimbal spring 2,
When the gimbal spring 2 is mounted on the load spring 3 and assembled, the tip of the projection 1A provided on the magnetic head slider 1 abuts on the load spring 3 in a pressed state, and the gap between the magnetic head slider 1 and the load spring 3 is set. And it is in a state of being electrically connected directly.

When reading or writing recorded information from a magnetic recording medium, the magnetic head slider 1
In the floating state, the projection 1A which is positioned in advance
To follow the surface of the magnetic recording medium.

The protrusion 1A may have a rounded tip. As a result, the swinging is performed favorably, and the followability of the head is improved.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIG. In this embodiment, a magnetic head slider 1 made of AlTiC is applied by a photolithography method.
After covering the portion corresponding to the projection 1A, the portion is cut off by about 50 nm by ion etching. Thereby, a cylindrical or conical projection is formed.

The diameter of the cylindrical projection 1A is 50
nm. A gimbal spring 2 provided with a through hole 2A is bonded to the magnetic head slider 1. 2A through hole
Has a size of 70 nm. The gimbal spring 2 is made of SUS304 and has a thickness of 30 nm.
It is.

As the adhesive for bonding the magnetic head slider 1 and the gimbal spring 2, a thermosetting epoxy adhesive is used. The load spring 3 holding the gimbal spring 2 by welding is made of SUS304 and has a thickness of 6 mm.
0 nm.

The load spring 3 always keeps the protrusion 1A of the magnetic head slider 1 in use of the head.
To generate a load of 3.5 gf.

[0032]

According to the present invention, since the projection provided on the magnetic head slider abuts the load spring directly and with a constant pressing force, the magnetic head slider and the load spring can be connected without using a conductive adhesive. Electrical continuity can be obtained. Therefore, it is possible to provide a magnetic head assembly that can easily cope with the miniaturization of the magnetic head slider and has stable reliability.

Further, since the protrusion of the magnetic head slider can be provided at a predetermined position in advance, the swing of the magnetic head slider can be reduced as compared with the case where the magnetic head assembly is assembled using a jig as in the prior art. The position of the center of movement is always stabilized, and the variation of the flying height can be reduced, whereby it is possible to obtain a good tracking performance of the magnetic head slider.

Further, by forming the projections by photolithography and ion etching, the projections can be positioned with higher accuracy, and the variation of the flying height can be further prevented and the followability of the magnetic head slider can be improved. It is possible to plan.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional example.

FIG. 3 is an explanatory view showing a positioning operation at the time of assembly of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic head slider 1A Projection part 1B Magnetic head 2 Gimbal spring 2A Slider mounting part 2B Through hole 3 Load spring

Claims (3)

[Claims] 1. A magnetic head slider having a magnetic head for reading or writing recorded information from a magnetic recording medium, a gimbal spring having a slider mounting portion for swingably holding the magnetic head slider, and a gimbal. A magnetic head assembly including a load spring for holding a spring, wherein a protrusion is formed on a contact surface side of the magnetic head slider with the gimbal spring, and a tip of the protrusion directly contacts the load spring. A magnetic head assembly characterized by the above-mentioned. 2. A gimbal spring, wherein a through hole is provided at a position corresponding to the protrusion in the slider mounting portion of the gimbal spring, and the protrusion is made to protrude at least beyond the thickness of the gimbal spring. The magnetic head assembly according to claim 1, wherein: 3. The magnetic head assembly according to claim 1, wherein the protrusion is formed by a photolithography method and an ion etching method.