JPH06187626A - Magnetic head slider and its supporter, production of the slider and supporter, and magnetic disk device - Google Patents

Abstract

(57) [Summary] [Structure] A magnetic transducer 3 is mounted and a slider surface 1a for holding a rubbing contact state is provided.
Slider 1 and slider surface 2a which can be an air bearing surface,
The second slider 2 provided with 2b is connected so as to move in the thickness direction of the slider, and a different predetermined load is applied to each. [Effect] The rubbing contact state can be held while the magnetic head slider simultaneously follows the long-wavelength and short-wavelength undulations of the surface of the recording medium that rotates at high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head slider, a support for the same, a method for manufacturing the same, and a magnetic disk device, and more particularly to a magnetic head slider excellent in high recording density, high reliability and low cost. The present invention relates to a support, a method for manufacturing the support, and a magnetic disk device.

[0002]

2. Description of the Related Art A magnetic head slider used in a conventional magnetic disk device is an application of a conventional air bearing, which is used to reduce the aerodynamic levitation force generated during rotation of a magnetic recording medium and the magnetic head slider. The distance from the surface of the magnetic recording medium is very small so that the predetermined load applied from the supporting body is balanced, and the surface of the magnetic recording medium flies stably while keeping it constant.

Further, on the surface of the recording medium which is running, there are all wavelengths from long-wave undulations such as runout to short-wave undulations such as slider length and surface roughness, and in order to follow these undulations. The slider has a slider / support system in which a restoring force acts on the movement of three degrees of freedom in the vertical direction, the pitching (front-back) direction, and the rolling (lateral) direction, and is dynamically stabilized. Since this vibration system can model the rigidity and damping coefficient of the air film with springs and dampers, in order to improve the follow-up characteristics to undulations, the slider weight should be reduced, the slider size should be smaller, the air film rigidity should be higher, and the damping should be high. Coefficienting is necessary. In addition, Electronic Design 5 March 1, 1980 (Electronic Desig
n, 5, March, 1, 1980, pp. 60-63), a magnetic transducer for applying a magnetic field or detecting a residual magnetic field may cause a minimum flying height of one slider rail. A thin film element is formed on the side surface of the outflow end by a lithographic technique.

Recent demands for higher performance of magnetic disk devices include higher recording density and smaller recording media. The requirements for those magnetic head sliders are to minimize the slider size and to reduce the flying height. In particular, when recording / reproducing while maintaining the rubbing contact state with the recording medium, the recording density is remarkably improved.

The method for recording / reproducing while traveling in contact, which is described in the 1990 National Conference of the Institute of Electronics, Information and Communication Engineers Autumn Meeting, SC-5-1, 5-268, uses a main pole excitation type single pole head. It is attached to the tip of the movable part that slides up and down, and the tip of the movable part is pushed and supported by its own weight or spring. This problem is that contact traveling is possible for minute undulations of surface roughness, but it becomes a slider-support system for following long-wave undulations such as runouts and undulations of wavelengths of the slider length. Not at all. For this reason, when the number of revolutions and the undulation amplitude increase, the slider cannot follow the undulation of a long wavelength, comes into contact with the recording medium, and is damaged.

The conventional magnetic head slider disclosed in Japanese Patent Laid-Open No. 62-167610 is provided with a slider surface which can be in contact with a slider surface and a slider surface which can be an air bearing surface, so that the contact force with the recording medium surface is reduced. It has become. This problem is a slider support system for following a long wavelength like a runout and a swell of a wavelength of about the slider length.
It is difficult to maintain a constant contact state, and intermittent contact is permitted.

The conventional magnetic head slider disclosed in Japanese Patent Laid-Open No. 63-306514 is a conventional magnetic head slider, which is a micro slider having a magnetic transducer via a sled-like flexible support. It is mounted to improve the follow-up characteristic to any undulations on the surface of the recording medium, but it is not a method of recording and reproducing while traveling in contact.

As described above, it is very effective for the magnetic head slider to maintain the rubbing contact state while simultaneously following the long-wave undulation such as runout and the short-wave undulation such as the slider length and surface roughness. difficult.

IEE Transactions
On Magnetics MAG 27 (IEEE Tran
s.MAG., MAG-27), 6 (1991) 4921, the method described on page 4921
This is a method of applying micromechatronics and lithographic technology to make an ultra-compact head with slider and gimbal integrated contact travel with a light load, but high-speed access is difficult and costly.

The method described in Japanese Patent Laid-Open No. 4-113568 is a method of floating a magnetic head slider with a lubricant, but it is necessary to thicken the lubricant until a meniscus can be formed. The rotational scattering of the agent becomes a problem. Also, if the lubricant is thinned to a few molecular layers,
Since the viscous coefficient is several 10 ⁴ to 10 ⁷ times, and it behaves in a solid state, this method cannot be used, and has a magnetic flying height limit value.

A conventional magnetic head slider support has two outer flexible fingers which are connected to each other by a step-like low-flexible lateral frame as described in Japanese Patent Laid-Open No. 55-22296. Portion having a rectangular cutout portion, a flexible central tongue portion extending from the lateral frame toward the rectangular cutout portion, an elastic portion supporting the flexible body, and a load beam portion. A support body for a magnetic head slider, comprising: a member that also serves as a member, and a load protrusion that is provided between the member that serves as a member and the central tongue. With these configurations, the magnetic head slider can follow the undulations on the surface of the recording medium that rotates at a high speed.
With the load protrusion as a fulcrum, the slider can be moved in three degrees of freedom: vertical movement, pitching, and rolling. At the same time, the levitation force aerodynamically generated during rotation of the magnetic recording medium and the predetermined load applied from the load beam portion via the load projection portion are balanced. However, the sliders 1 and 2 are not supports to which separate loads are applied, as disclosed later in the present invention.

[0012]

SUMMARY OF THE INVENTION In the above-described conventional magnetic head slider for recording / reproducing while traveling in contact, long-wave undulations such as runout and short-wave undulations such as slider length / surface roughness are simultaneously formed. It was difficult to keep the rubbing contact state while following.

It is an object of the present invention to maintain the rubbing contact state while simultaneously causing the magnetic head slider to follow any undulations of long wavelength and short wavelength on the surface of a recording medium which is rotated at a high speed.

Another object of the present invention is to provide a support for supporting the magnetic head slider.

Another object of the present invention is to provide a manufacturing method for manufacturing a magnetic head slider at low cost.

[0016]

A first slider provided with a magnetic transducer and provided with a slider surface for holding a rubbing contact state and a second slider provided with a slider surface which can be an air bearing surface are provided. They were connected so as to move in the thickness direction.

In the support for supporting the first slider and the second slider, the load beam portion is provided with a rectangular notch so that a separate load is applied to the first slider and the second slider. I made it to my body.

[0018]

In the second slider and its supporting body, the slider surface which can be an air bearing surface and the supporting body which allows the slider to move in three degrees of freedom including vertical movement, pitching and rolling are provided. It is possible to follow undulations of such a long wavelength and a wavelength of about the slider length.

Since the first slider and the supporting body for mounting the magnetic transducer are provided with a slider surface for holding the rubbing contact state and a supporting body that can be loaded on the slider, waviness of a short wavelength of about surface roughness is provided. The rubbing contact state can be maintained while following. Furthermore, since the first slider moves integrally with the second slider in two degrees of freedom in the pitching / rolling direction and independently in the vertical direction with respect to the second slider, it can be used for long-wave undulations such as runout. However, the rubbing contact state can be maintained.

[0020]

1 shows a magnetic head slider according to an embodiment of the present invention. The first slider 1 is provided with a slider surface 1a for holding the rubbing contact state, and the thin film element 3
Is mounted on the outflow end side surface of the first slider 1 that can provide the minimum flying height. For the second slider 2, a taper flat slider rail 2 which can be an air bearing surface according to the prior art is used.
a and 2b are provided in parallel along both sides.

When there is a possibility that the slider surface 1a of the first slider can be an air bearing surface, air film lubrication is performed by selecting the applied load and the slider shape so that the damping coefficient of the air film is negative. Operate in an unstable area so that it does not float stably.

The connecting portion 4 with the first and second sliders has a trapezoidal shape and moves in the thickness direction of the slider.
Operates to constrain the length of the slider.

FIG. 2 shows a conventional magnetic head slider.
The thin film element 3 of the conventional magnetic head slider 5 is mounted on the outflow end of either one of the two tapered flat slider rails 2a 'and 2b'.

3 and 4 show a method of manufacturing the magnetic head slider of the embodiment of the present invention.

(1) Cutting out the block 6 with thin film element
(See Figure 3a).

(2) By conventional machining, the slider surface 1a of the first slider and the taper flat slider rail 2
a and 2b are formed (see FIGS. 3b to 4a).

(3) By conventional electric discharge machining or laser machining, the first slider and the second slider are separated so that the connecting portion 4 has a trapezoidal shape (see FIG. 4b).

(4) A solid lubricant such as molybdenum disulfide or carbon, or KRYTOX143 fluorinated oil is formed on the surface 7 of the connecting portion between the first slider and the second slider.
A liquid lubricant such as FonbinZ (manufactured by DuPont) is attached (see FIG. 4c).

As described above, since the magnetic head slider of the present invention is processed by the conventional method of machining / electric discharge machining or laser processing, it can be manufactured at a lower cost than the micromechatronics and lithography processing methods.

FIG. 5 shows a support of the magnetic head slider of the embodiment of the present invention. Each of the first slider 1 and the second slider 2 is provided with a load projection portion 8, and a load beam portion 9 is provided with a rectangular cutout portion 10 to provide a rectangular cutout portion for the first slider 1. At 10, the load is applied to the second slider 2 independently by the load beam portion 9.

FIG. 6 shows a conventional magnetic head slider support. In the conventional magnetic head slider support, a load is applied to the magnetic head slider 5 by the load beam portion 9 via one load protrusion portion 8.

FIG. 7 shows how the magnetic head slider according to the embodiment of the present invention follows the surface of the magnetic recording medium. The magnetic head slider according to the embodiment of the present invention can maintain the rubbing contact state while simultaneously following the long-wavelength waviness 13 such as a runout and the short-wavelength waviness 12 such as surface roughness.

[0033]

According to the present invention, the rubbing contact state can be maintained while the magnetic head slider is made to follow the long-wavelength waviness and the short-wavelength waviness of the surface of the recording medium rotated at a high speed, and a high density recording can be realized. High reliability and low cost can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a magnetic head slider according to an embodiment of the invention.

FIG. 2 is a perspective view showing a conventional magnetic head slider.

FIG. 3 is an explanatory diagram showing a method of manufacturing the magnetic head slider according to the embodiment of the invention.

FIG. 4 is an explanatory diagram showing a method of manufacturing the magnetic head slider according to the embodiment of the invention.

FIG. 5 is an explanatory view showing a support body of the magnetic head slider of the embodiment of the invention.

FIG. 6 is an explanatory view showing a support of a conventional magnetic head slider.

FIG. 7 is an explanatory diagram showing how the magnetic head slider according to the embodiment of the present invention follows on the surface of a magnetic recording medium.

[Explanation of symbols]

1 ... 1st slider, 2 ... 2nd slider, 1a ... 1st
Slider surfaces of the sliders 2a, 2b ... Tapered flat slider rails, 3 ... Thin film element, 4 ... Connection portion between first slider and second slider.

Claims (9)

[Claims] 1. A magnetic head slider for mounting a magnetic transducer capable of recording or reproducing a recording signal on a magnetic recording medium and maintaining a contact or intermittent contact state on the surface of the rotating magnetic recording medium, wherein the magnetic transducer is A first slider provided with a slider surface for holding a contact state on the surface of the magnetic recording medium that is mounted and rotated, and a second slider provided with a slider surface that can be an air bearing surface are formed in the thickness direction of the slider. A magnetic head slider characterized in that it is movably connected to the magnetic head slider. 2. The first slider according to claim 1, wherein the first slider moves integrally with the second slider in the front-rear direction and the lateral direction on the surface of the rotating magnetic recording medium, and in the vertical direction. And a magnetic head slider configured to move independently of the second slider. 3. A load is applied to the magnetic head slider so that the magnetic head slider having a magnetic transducer capable of recording or reproducing a recording signal on the magnetic recording medium is aerobically stably levitated on the rotating magnetic recording medium. A support body for a magnetic head slider, wherein a support beam portion for applying a load via a projection portion is provided, wherein different loads are applied to a plurality of magnetic head sliders. 4. The magnetic head slider according to claim 1, wherein the connecting portion between the first slider and the second slider has a trapezoidal shape. 5. The magnetic head slider according to claim 1, wherein a solid lubricant or a liquid lubricant is attached to a surface of a connecting portion between the first slider and the second slider. 6. The air lubrication film on the slider surface of the first slider is operated in an unstable region, and the air lubrication film on the slider surface of the second slider is operated in a stable region. Magnetic head slider and its support. 7. The magnetic head slider support according to claim 3, wherein the load beam portion is provided with a rectangular notch. 8. The method according to claim 1, wherein the slider surface of the first slider and the slider surface of the second slider are machined from a block mounting a magnetic transducer, the first slider and the first slider. A method of manufacturing a magnetic head slider, comprising the step of separating the second slider by laser processing or electric discharge processing. 9. A magnetic disk device according to claim 1, wherein the magnetic head slider and a support for the magnetic head slider are used.