JPH0414689A - Floating head slider - Google Patents

Abstract

PURPOSE:To realize an excellent floating rising characteristic by forming a slot between a fluid intake end of a slider fluid deliver end and tapering the depth of the groove so as to be deeper from the fluid intake end of the slider toward the fluid delivery end. CONSTITUTION:A floating head slider 10 is formed to be nearly rectangular as a whole, and floating faces (rail faces) 1, 1' formed long in the flowing direction A of a fluid are provided to a face opposite to a magnetic recording medium and a breed slot 3 being a groove is formed in the middle between both the rail faces 1, 1', the breed slot 3 is provided between a fluid intake end 8 of a slider and a fluid delivery end 9, and its bottom face 3a and wall faces 3b, 3b' are all formed flat. The bottom face 3a of the breed slot 3 has a slope gradually deeper from the fluid intake end 8 toward the fluid delivery end 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floating head slider, and more particularly, to a floating head slider.
The present invention relates to a floating head slider that is disposed facing the surface of a magnetic recording medium with a small gap therebetween.

[Prior Art] A floating head slider has conventionally been used to support an electromagnetic transducer that faces the magnetic recording surface of a magnetic recording medium and performs reading and writing of magnetic recording.

A conventional floating head slider is a tapered flat slider that forms positive pressure in the air layer over the entire surface of the air bearing surface that is the gap between it and the magnetic recording medium, thereby obtaining a positive flying edge over the entire surface of the air bearing surface. Common. However, in order to reduce wear on the magnetic head and magnetic recording medium, especially in contact stop type sliders, etc., or to improve the start-up characteristics of the recording medium when starting up, a part of the air layer on the air bearing surface side is used. A range in which negative pressure is generated is provided, and the pressing force of the slider is balanced with the floating blade, which algebraically adds positive and negative floating blades between this negative pressure area and other positive pressure areas.

A so-called negative pressure type floating head slider is also known.

Japanese Unexamined Patent Publication No. 1-245480 discloses a floating head slider of the floating type, and in the case of the slider of this publication, as shown in FIGS. 7 and 8 of the present application, the fluid introduction end 78 side A step groove 72, 72' that opens to the side and a recess groove 73 that creates positive pressure in the air layer at the rail surfaces 71, 71', 75 and opens to the air outlet end 79 side.
A configuration is adopted in which a negative pressure is obtained in the air layer, and as described above, the floating blade is formed by the sum of the positive and negative floating blades on both the grooves and the rail surface.

[Problems to be Solved by the Invention] In the case of the slider grooves 72, 72' and 73 of the above-mentioned publication.

Both grooves are surrounded on three sides by the air bearing surfaces 71, 71' and 75, but it is generally difficult to machine the bottom of the groove surrounded on three sides and the surrounding side surfaces with a certain level of finishing accuracy. It is known that there is. Therefore, especially in the case of a floating head slider that requires strict dimensional accuracy, it is extremely difficult to form grooves with such shapes within the required accuracy by machining. Therefore, in the above-mentioned publication as well, this groove is formed by etching (dry etching).

However, when dry etching is used to process the shape of a floating head slider, which is a mass-produced product, dry etching takes longer processing time and is more expensive than machining, so the manufacturing cost of the floating head slider is significantly reduced. The problem is that the amount increases.

Furthermore, if you use this with the shape processed by dry etching, the surface of the slider may damage the recording surface of the recording medium when it comes into contact with the surface of the recording medium because dry etching alone cannot produce a sufficiently smooth surface. However, there is also the problem that the durability of the recording medium is reduced.

In view of the above problems, an object of the present invention is to improve the conventional negative pressure type floating head slider and provide a negative pressure type floating head slider that can be easily shaped and reduced in processing cost. .

Another object of the present invention is to provide a negative pressure-utilizing floating head slider in which the surface of the slider can be sufficiently finished, thereby eliminating the risk of damaging the surface of the medium when the slider contacts the recording medium. shall be.

[Means for Solving the Problems] An object of the present invention is to provide a floating head slider having a rail surface serving as an air bearing surface and a groove adjacent to the rail surface on the side facing a magnetic recording medium.

This is achieved by a floating head slider characterized in that the groove is formed between a fluid introducing end and a fluid leading end of the slider, and has a slope that becomes deeper from the fluid introducing end toward the fluid leading end. Ru.

[Function] The fluid introduced from the fluid introduction end of the slider between the recording surface of the magnetic recording medium and the slider forms a positive pressure in the air layer in the range of the rail surface that becomes the flying surface of the slider. In the range of the groove, a negative pressure is formed in the air layer due to the slope of the groove which becomes deeper from the fluid introduction end to the fluid outlet end.

This slider is a negative pressure utilization type slider.

Since the groove is formed from the fluid inlet end to the fluid outlet end, it is easy to form this groove by machining, which reduces machining costs and makes it possible to machine a slider with sufficient dimensional accuracy and a smooth surface. Become.

[Example] The floating head slider of the present invention will be further described with reference to the drawings. FIG. 1 is a plan view of a magnetic head equipped with a negative pressure type floating head slider according to an embodiment of the present invention, viewed from the side facing the medium, and FIG. 2 is a plan view of the magnetic head of FIG. 1. FIG. 2 is a side view seen from the side in a direction perpendicular to the fluid flow direction.

In FIGS. 1 and 2, the floating head slider 10 is generally rectangular in shape.

On the side facing the magnetic recording medium, an air bearing surface (rail surface) 1.1' formed long in the fluid flow direction A is provided on the side, and a central portion between both rail surfaces 1.1' is provided. A bleed slot 3 serving as a groove is formed in the slider, and the bleed slot 3 is provided between the fluid inlet end 8 and the fluid outlet end 9 of the slider, and its bottom surface 3a and wall surfaces 3b and 3b' are both formed as flat surfaces. has been done.

As shown in FIG. 2, the bottom surface 3a of the bleed slot 3 has a constant slope that gradually deepens from the fluid introduction end 8 to the fluid exit end 9, and this bottom surface 3a is formed with high precision by machining. has been done. Also, the rail surface 1.
At the fluid introduction side end of 1', the corners are cut off to form lapped surfaces 5 and 5' which are respectively inclined surfaces. The lap surface 5゜5' is the rail surface 1.1' arranged at the rear thereof.
With.

Sufficient machining is performed so that the slider does not damage the surface of the recording medium when landing on the surface of the recording medium and when starting to fly.

At the portion of the rail surfaces 1, 1' of the rear end 9 of the slider 10 that serves as the fluid lead-out end, there is provided an electromagnetic transducer 7,7' having magnetic gaps 7g, 7a' on the rail surfaces 1, 1' side. It is formed using a thin film formation method.

In the case of this embodiment, the external dimensions of the slider are the dimension in the fluid flow direction, the width dimension W in the direction perpendicular to this, and the thickness d, respectively.
=1~3mm, W-1~2mm, d-0,4~
0.7 degrees, and the width W of each rail surface 1, 1'.

is W+ -0.2 to 0.6 m, groove depth dl at the fluid outlet end is d, -0.05 to 0.1 mm
There is.

The slope of the bleed slot is 51 to 10 as the difference in groove depth.
It is 0 μm.

FIGS. 3 and 4 show two alternative embodiments of the floating head slider of the present invention, similar to FIGS. 1 and 2. In FIGS.

In the slider 30 of this embodiment, in addition to the structure of the floating head slider lO of the embodiment shown in FIGS.
The side grooves 34 and 34' also have a groove depth that increases from the fluid inlet end 38 to the fluid outlet end 39 so as to act as a negative pressure forming part similarly to the bleed slot 33. A certain slope is provided.

5 and 6 illustrate a floating head slider according to yet another embodiment of the present invention, similar to FIGS. 1 and 2. FIG. The slider 50 of this embodiment has three rail surfaces 51.
．． 51' This is a so-called tri-rail type floating head slider in which 51' are formed, and three rail surfaces 51.
Two bleed slots 53 between 51' and 51'
．． 53' is formed. Each bleed slot 53.
53' are from the conductor inflow end 58 to the conductor outflow end 5.
It has a constant slope that deepens towards 9. Each rail surface 51.51', 51'' has a wrap surface 55.55' at the conductor inflow end 58, as in the previous embodiment.
, 55' are formed.

At the center of the end surface of the air outflow end 59 of this slider 50,
Only one electromagnetic transducer 57 is formed, and the magnetic gap 57a of this electromagnetic transducer 57 is as follows.

It is provided at the lateral center of the central rail surface 51'. As described above, since the magnetic head slider 50 of this embodiment has only one electromagnetic transducer 57 at the center in the lateral direction, the relative position of the magnetic gap 57a and the recording medium can be adjusted even when the slider 50 is rolling. Since changes are kept small, it becomes a highly reliable magnetic head in terms of read/write performance.

As explained in each of the above embodiments, in the floating head slider 10.30.50 of the embodiment of the present invention, each bleed slot 3.33.53.53' and side groove 34.34'
Both have a fluid introduction end 8 on the side facing the magnetic recording medium.
．． Since it is provided in a straight line from 38.58 to the fluid outlet end 9.39.59, this shape can be easily processed by one machining process along with the processing of other rail parts other than the groove. can.

Therefore, the process can be simplified, and compared with conventional grooves whose shape is processed by etching, precise processing is easier and costs can be reduced.

[Effect of the invention] In a floating head slider according to the present invention.

A groove is formed that is adjacent to the rail surface serving as the floating surface of the floating head slider and extends from the fluid introduction end to the fluid outlet end, and the groove is provided with a slope that becomes deeper from the fluid introduction end to the fluid outlet end. With this configuration, by using a floating blade that combines a negative floating blade due to the negative pressure of the air layer formed in the groove and a positive floating blade due to the positive pressure on the rail surface, this composite floating blade The pressing load of the slider that must be balanced with the slider can be extremely small, and good flying and rising characteristics can be obtained in the floating head slider.
Furthermore, since the groove processing can be performed by machining, it is possible to provide a negative pressure-utilizing floating head slider that allows precise processing and reduces costs.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a negative pressure type floating head slider according to an embodiment of the present invention, viewed from the side facing a magnetic recording medium. FIG. 2 is a side view of the floating head slider of FIG. 1, viewed from a direction perpendicular to the fluid flow direction. 3 and 4 are views similar to FIGS. 1 and 2, respectively, of a floating head slider according to another embodiment of the present invention. 5 and 6 are views similar to FIGS. 1 and 2, respectively, of a floating head slider in accordance with yet another embodiment of the present invention. 7 and 8 are views similar to FIGS. 1 and 2 of a conventional negative pressure type floating head slider. It is. 3a, 33a, 53a, 53a'...groove bottom surface 10, 20.30...floating head slider 5, 5',
35.35', 55.55', 55'...
Lap surface ill, 38.58...Fluid introduction end 9, 39.59
...Fluid lead-out end 7, 7', 37.37', 57...Electromagnetic conversion element A...Fluid flow direction Applicant Fuji Photo Film Co., Ltd. Agent Patent attorney Asami Kato 1, 1', 31. 3
1', 51. 51', 51'...
Rail surface (air bearing surface) 3, 33.53.53'...Bleed slot (groove) Fig. 1 Fig. 7/1 Fig. 8 Fig. 2 Fig. 7゜

Claims (1)

[Claims] A floating head slider having a rail surface serving as an air bearing surface and a groove adjacent to the rail surface on the side facing the magnetic recording medium, wherein the groove extends between a fluid inlet end and a fluid outlet end of the slider. What is claimed is: 1. A floating head slider having a slope that becomes deeper from a fluid introduction end toward a fluid exit end.