JPH01166382A - Magnetic head slider - Google Patents

Abstract

PURPOSE:To obtain high recording density by fixing a piezoelectric element to the back of a slider and arbitrarily changing the flat degree of a slider surface, which faces to a magnetic disk, with an impressing voltage. CONSTITUTION:By impressing the voltage to a piezoelectric element 4, which is fixed to the back of a slider 2 of a magnetic head slider 1, before a disk 5 is rotated, the piezoelectric element 4 generates deformation in the thickness direction of the slider 2 and then, the slider 2 surface to face to the magnetic disk 5 is deformed in a circular arcuate shape. Accordingly, attraction between the magnetic disk 5 and the magnetic head slider 1 is reduced. On the other hand, by removing the impressing voltage after the disk 5 is rotated, the slider 2 surface to face to the magnetic disk 5 surface goes to be flat and a minimum floating interval can be positioned to the flowing-out edge part of the slider 2, namely, to a thin film element 3 part. Accordingly, an arbitrary setting can be executed to an optimum crown height hc to the attraction. Thus, the high recording density can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a contact start/stop type magnetic head slider used in a magnetic disk drive device.
The present invention relates to a slider, and particularly relates to a magnetic head slider that suppresses adhesion between a magnetic disk and a magnetic head slider, and has high magnetic recording characteristics and reliability.

[Conventional technology]

In a magnetic head slider, when the slider is used in the contact start-stop method (hereinafter referred to as C8S method), if the mirror-like magnetic disk surface and slider surface are left in close contact for a long time, the magnetic head slider will be exposed to the magnetic disk surface. A phenomenon occurs in which the slider is attracted.

As a countermeasure against this problem, Japanese Patent Application Laid-open No. 155558/1983 describes that the slider surface is made into an arc. To form this circular arc surface coating, when finishing the slider surface by lapping, it is common to wrap the slider surface using a concave lapping surface plate to form one circular arc surface.

[Problem that the invention seeks to solve]

The magnetic head is capable of producing a substantial reproduction output close to the magnetic disk and achieving a high recording density (11).For this reason, the magnetic head is usually mounted on a slider in a magnetic head slider facing the magnetic disk of the slider. It is generally formed at the position of the smallest gap between surfaces.

When using a thin film element as a magnetic head.

Since the thin film element is formed at the outflow end of the slider in the magnetic head slider, when expressed as 1 circular arc surface shape (r crown height) Jc (see Figure 1), as the crown height 5c increases, the magnetic head slider In this case, the minimum gap between the slider and the magnetic disc does not coincide with the outflow end, which is a problem in terms of magnetic properties. Therefore, in a magnetic head slider in which a thin film element is formed at the outflow end, the slider has a crown height of JLo'
l: (It is necessary to keep it small. Also, this crown height) The upper limit of 4G in a magnetic head slider varies depending on the conditions in which the slider is used (magnetic disk speed, gap between the magnetic head and magnetic disk, etc.), but However, it is necessary to keep the value to a very small value (1L06 μm or less). On the other hand, in the magnetic head slider, in order to suppress the adhesion between the slider and the magnetic disk, α04
Crown height JL of μm or more, preferably around α1μm
6 is desired. However, when forming this crown height groove, it is necessary to consider processing accuracy, which is disadvantageous for minimum clearance or suction.

The purpose of the present invention is to provide an optimal method for adsorption (low-rise)
It is an object of the present invention to provide a magnetic head slider that can arbitrarily set Jci and has good recording and reproducing characteristics.

[Means for solving problems]

The purpose of the upper P+ is to fix a piezoelectric element to the opposite surface of the slider facing the disk surface (hereinafter referred to as the slider back surface) in a magnetic head slider, and deform the piezoelectric element by applying voltage so that the piezoelectric element faces the disk surface. By deforming the slider surface, a crown I/tom can be formed and adsorption can be suppressed.

[Effect]

In the magnetic head slider before the disk rotates, the piezoelectric element is deformed in the thickness direction of the slider by applying a voltage to the element fixed to the back of the slider.As a result, the slider faces the magnetic disk surface. Transforms the surface into an arc.

Thereby, the adhesion between the magnetic disk and the magnetic head slider can be greatly reduced. On the other hand, by removing the applied voltage after the disk has rotated, the slider surface facing the magnetic disk surface becomes flat, and the minimum flying clearance can be located at the outflow end of the slider, that is, at the thin film element section.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

(a) is a side view of the slider and the magnetic disk in the magnetic head slider before the disk rotates. In the magnetic head slider, the slider 1 has a thin film element 3 formed at the outflow end of the slider 2, and a piezoelectric element 4 fixed to the back surface of the slider facing the magnetic disk 5.

Before the disk rotates, the voltage element 4 is deformed by supplying a voltage to the applied circuit, and a crown height Jc is generated on the slider surface facing the magnetic disk 5 (in this case, 004 to (115 μm)) when the disk rotates. Start.

For this reason, in magnetic disks and magnetic head sliders,
Adsorption with the slider is greatly reduced. (b) is a side view of the slider and the magnetic disk in the magnetic head slider after the disk has rotated. By stopping the supply of voltage to the piezoelectric element 4 after the rotation of the disk or after a certain period of time, the crown height (L6) of the slider surface facing the magnetic disk 5 is approximately 0 μm, so the minimum flying clearance 47F+ The thin film element portion 3 can be formed at the outflow end of the slider 2. In this case, the pressure gL element 4 is necessary for suppressing adsorption and can be fabricated by selecting the thickness, length, material, applied voltage, etc. according to the Raun height. In addition, if the piezoelectric element 4 requires large deformation,
It is sufficient to use a sand inch type with a metal electrode arranged in the intermediate layer. [Effects of the Invention] According to the present invention, it is possible to arbitrarily set the optimal round hide LO for adsorption, and the Since the minimum flying clearance can be located at the thin film element portion at the outflow end, it is possible to provide a highly reliable magnetic head slider suitable for high recording density.

[Brief explanation of the drawing]

The first figure is a side view of a slider and a magnetic disk in a magnetic head slider according to an embodiment of the present invention, and (a) is a side view of the slider and magnetic disk in a magnetic head slider before disk rotation. <1)) is a side view of the slider and the magnetic disk in the magnetic head slider after the disk has been rotated. 1...Magnetic hent slider. 2...Slider, 5...Thin film element. 4...Piezoelectric element, 5...Magnetic disk. 1G...Crown point, 4%-...Minimum levitation gap.

Claims (1)

[Claims] 1. A magnetic head slider used in the contact start/stop method is characterized in that a piezoelectric element is fixed to the back of the slider, and the flatness of the slider surface facing the magnetic disk can be arbitrarily changed by applying voltage. magnetic head slider.