JP2001209920A - Floating head slider and disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a floating head slider extremely excellent in the dust-proof characteristic. SOLUTION: On the base surface 3 of the floating head slider, a step surface 4 and a rail surface 5 are formed having the difference in level, respectively. These step surface 4 and the front side difference in level surfaces 6 and 7 of the rail surface 5 are formed in a shape curved along a nearly parabola toward both sides part from the central part, and the spacing of the inflow direction of the air flow of the step surface 4 and the rear side difference in level surfaces 8 and 9 of the rail surface 5 is formed 10 μm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is applied to a large-capacity storage device capable of recording and / or reproducing large-capacity data using a rotary storage medium such as a magnetic disk, an optical disk and a magneto-optical disk. The present invention belongs to the technical field of a flying head slider most suitable for performing the above and a disk drive device using the flying head slider.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 10 and 11, in a removable hard disk drive (hereinafter referred to as an R-HDD) 31 which is an example of a disk drive, a rotary head actuator 32 is used. A suspension 33 composed of a thin leaf spring is attached to the tip of the head actuator 32, and a flying head slider 34 is supported at the tip of the suspension 33 via a gimbal plate or the like. I have. A hard disk 35 composed of a magnetic disk is rotatably accommodated in a cartridge 36, and the hard disk 35 is rotated by the cartridge 36.
-It is configured to be exchangeably (removably) loaded into the HDD 31.

[0003] A spindle motor 37 is mounted in the R-HDD 31, and a center core 38 made of a ferromagnetic material of a hard disk 35 loaded in the R-HDD 31 by a cartridge 36 is mounted on the top of the spindle motor 37. Is chucked on the chucking magnet 39. Then, the hard disk 35 is rotated at high speed in the direction of arrow a by the spindle motor 37, and the recording surface 35 of the hard disk 35 is rotated.
An air flow AS that flows in the direction of arrow a used as a dynamic pressure bearing is generated on the surface of a. Then, the flying head slider 34 is pressed against the airflow AS on the recording surface of the hard disk 35 by the spring force of the suspension 33 of the head actuator 32 so that the flying head slider 34 is placed on the surface of the recording surface of the hard disk 35. Float to a value of several tens nm. The head actuator 32 seeks the flying head slider 34 in the directions of arrows b and c, which are the inner and outer peripheral directions of the hard disk 35, and performs high-density recording and reproduction of information. FIG. 11 shows the skew angle (the opening angle of the flying head slider 34 with respect to the tangent to the recording track) when the flying head slider 34 is sought in the directions of arrows b and c by the head actuator 32 on the inner and outer circumferences of the hard disk 35. The skew angle θ is inverted to a plus skew angle + θ and a minus skew angle −θ at the radial midpoint of the recording track, and when the flying head slider 34 seeks to the outermost periphery of the recording track. Becomes the maximum plus skew angle + θ, and conversely, when the flying head slider 34 seeks to the innermost circumference of the recording track, the skew angle θ becomes the maximum minus skew angle -θ.

As shown in FIGS. 12 and 13, a conventional general flying head slider 34 has a base surface opposed to a recording surface 35a of a hard disk 35 of a slider body 41 having a flat rectangular parallelepiped shape. On the front end surface 41a of the slider body 41, which is the end surface on the upstream side (the direction opposite to the direction of the arrow a) of the inflow direction (= rotation direction of the hard disk 35) of the airflow AS on the side 42. A step surface 43 having a substantially U-shaped planar shape is formed at a position in a parallel surface shape having a step with respect to the base surface 42 (the step surface 43 and the base surface 42 are parallel),
A U-shaped rail surface 44 is formed on the base surface 42 at a position deviated downstream of the step surface 43 (the forward side in the direction of arrow a) from the step surface 43 with respect to the step surface 43 and the base surface 42. It is formed in a parallel plane shape having a step (the rail surface 44 is parallel to the step surface 43 and the base surface 42). At this time, the rail surface 44 is formed in a U-shape in plan view by a front rail surface 44a perpendicular to the slider center P and a pair of rear rail surfaces 44b parallel to the slider center P. A front step surface 45 between the front surface 43 and the front rail surface 44a of the rail surface 44 is formed at right angles to the slider center P. The front step surface 45 and the step surface 4
3 is formed in the positive pressure generating portion 46, and a concave portion surrounded by a U-shape between the front rail surface 44a of the rail surface 44 and the pair of rear rail surfaces 44b is a negative pressure generating portion. 47
Is formed. The recording surface of the hard disk 35 is located in the vicinity of the rear end surface 41b of the rail surface 44 near the rear end surface 41b which is the downstream end surface of the slider body 41 in the air flow inflow direction a. Record information,
The head chip of the magnetic head 48 to be reproduced is exposed.

As shown in FIGS. 12 to 14, a step surface 43 and a rail surface 44 are sequentially formed on a base surface 42 so as to have a step.
Is used as a reference surface of the uppermost layer, and the contour 51 of the rail surface 44 and the contour 52 of the step surface 43 are dug down by two steps corresponding to these steps by a processing method such as ion etching. ing. At this time, due to the processing accuracy, the contour 51 of the rail surface 44 is included in the contour 52 of the step surface 43 (the rail surface 44 is formed in a U shape slightly smaller than the step surface 43).
In general, these two contour lines 51 and 52 are cut together on the rear end face 41b of the slider body 41.

Therefore, in the conventional general flying head slider 34, a rear step surface 53 with respect to the step surface 43 is also formed on the front rail surface 44a of the rail surface 44 downstream of the inflow direction a of the air flow AS. The rear step surface 54 for the base surface 42 is formed further downstream of the rear step surface 53 of the step surface 43. Conventionally, an interval (hereinafter simply referred to as an anteroposterior interval) S in the inflow direction a of the airflow AS between the rear step surfaces 53 and 54 is conventionally used.
1 were formed at large intervals of 30 μm to 40 μm.

Then, as shown in FIG. 13, the recording surface 35a of the hard disk 35 rotated at a high speed in the direction of arrow a.
The front end surface 41a of the slider body 41 of the flying head slider 34 is oriented substantially perpendicularly to the upstream side in the inflow direction a of the airflow AS generated on the surface of By pressing the air flow AS on the air flow AS in a direction substantially perpendicular to the direction of arrow d by the spring force of the suspension 33, a positive pressure is generated by the positive pressure generating section 46 and the rail surface 44 is moved to the hard disk 3.
5 is lifted from the recording surface 35a to a flying height H of several tens of nanometers, while the negative pressure generated by the negative pressure generating unit 47 optimizes the flying height H of the rail surface 44 with respect to the recording surface 35a. The head 48 records and reproduces information on the recording surface 35a.

[0008]

In a fixed type hard disk drive in which the hard disk 35 cannot be replaced, the outer case of the drive main body is formed in a sealed case, and in a clean environment against dust, Since the flying head slider 34 can be floated on the recording surface 35a of the hard disk 35, dust is caught between the flying head slider 34 and the recording surface 35a, which adversely affects the flying attitude of the flying head slider 34. There are few things.

However, in the R-HDD 31 that requires replacement of the hard disk 35, dust is likely to enter the R-HDD 31 when the cartridge 36 is loaded and ejected. In addition, the airflow AS generated on the recording surface 35a of the hard disk 35 easily flows into between the flying head slider 34 and the recording surface 35a of the hard disk 35.

At this time, the conventional general flying head slider 34 has a rail surface 44 as shown in FIGS.
The distance S1 between the rear step surface 53 of the front rail surface 44a and the rear step surface 54 of the step surface 43 is 30 μm to 40 μm.
m, the hard disk 3
When the flow rate of the airflow AS increases with the high-speed rotation of the rear surface 5, as shown in FIG.
The swirl ws of the air flow AS is likely to be generated at two locations downstream of the rear and the rear step surfaces 53, 5 and 5.
4, the dust DS was easily attached to two places P1 and P2 on the step surface 43 and the base surface 42. Then, the attached dust DS eventually peels and flows out, and when a situation occurs in which the dust DS is sandwiched between the rail surface 44 and the recording surface 35a of the hard disk 35, the flying head slider 34 has a floating attitude such as pitching or rolling. And the recording / reproducing defect of the information occurs. In the worst case, the rail surface 44 of the flying head slider 34 or the magnetic head 48 contacts the recording surface 35a of the hard disk 35 rotating at high speed. Then, there is a problem that such a situation that both of them are crashed easily occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide a flying head slider having extremely excellent die resistance.

[0012]

In order to achieve the above object, a flying head slider according to the present invention comprises a rail surface and a step formed on a base surface of a slider main body in such a manner that the rail surface has a step and is formed in a substantially parallel plane. The space between the two rear step surfaces having a step with respect to the step surface and the base surface, respectively, is located on the downstream side of the air flow inflow direction of the surface, and the interval in the air flow inflow direction is 10 μm or less. is there.

According to the flying head slider of the present invention configured as described above, the step is located on the rail surface and the step surface on the downstream side in the inflow direction of the airflow, and the steps are respectively formed on the step surface and the base surface. Since the distance between the two rear step surfaces in the inflow direction of the air flow is configured to be a small distance of 10 μm or less, even if the rotation speed of the storage medium increases, the air flows downstream of the two rear step surfaces. Almost no swirl of the flow is generated, and it becomes difficult for dust to adhere to the downstream side of these two rear step surfaces.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a flying head slider applied to a removable hard disk drive (R-HDD) according to the present invention will be described below with reference to FIGS. The same components as those in FIGS. 10 and 14 are denoted by the same reference numerals, and the description thereof will not be repeated.

"Basic Configuration of Flying Head Slider" First, the basic configuration of the flying head slider 1 of the present invention will be described with reference to FIG.
A step surface 4 has a step G1 on a base surface 3 facing a recording surface of a hard disk of a slider main body 2 formed in a flat rectangular parallelepiped shape. The rail surface 5 is formed on the step surface 4 in a state parallel to the step surface 4 (being a plane parallel to the step surface 4) with a step G2. The step between the base surface 3 and the rail surface 5 is indicated by G3. At this time, step surface 4
And the rail surface 5 includes a first step surface 4a and a first rail surface 5a arranged on the upstream side in the inflow direction a of the airflow AS.
And the second step surface 4b and the second
Of the rail surface 5b. The first step surface 4a of the step surface 4 is arranged at a position deviated to the front end surface 2a side of the slider body 2, which is the upstream side in the inflow direction a of the airflow AS, and the first step surface 4a of the rail surface 5 The one rail surface 5a is arranged at a position deviated by a predetermined distance from the front end of the first step surface 4a to the downstream side in the inflow direction a of the airflow AS.

When the width direction of the base surface 3 is the X direction and the length direction is the Y direction, the first
A front stepped surface 6 having a step G1 with respect to the base surface 3 and an airflow AS of a first rail surface 5a of the rail surface 5 located upstream of the inflow direction a of the airflow AS on the step surface 4a.
Is located on the upstream side in the inflow direction a of the first step surface 4a.
Front surface 7 having a step G2 with respect to the air flow A
S in the width direction of the base surface 3 (X
Direction) from a substantially central portion to both side portions in a substantially similar shape curved substantially along a parabola. A rear step surface 8 which is located downstream of the first step surface 4a of the step surface 4 in the inflow direction a of the airflow AS and has a step G1 with respect to the base surface 3, and a first rail of the rail surface 5 Inflow direction a of air flow AS on surface 5a
The rear step surface 9 having a step G2 with respect to the step surface 4 and having a step G2 with respect to the step surface 4 also moves from the substantially central portion in the width direction (X direction) of the base surface 3 as it proceeds downstream in the inflow direction a of the airflow AS. It is formed in a substantially similar shape curved along a parabola by a continuous curve on both sides. However, the radii of curvature of the rear step surfaces 8 and 9 at the upstream portion in the inflow direction a of the airflow AS are front step surfaces 6 and 7.
Is smaller than the radius of curvature of the upstream portion of the air flow AS in the inflow direction a of the air flow AS, and the first step surfaces 4 and 7 are formed by the front step surfaces 6 and 7 and the rear step surfaces 8 and 9.
a and the contour lines 10 and 11 of the first rail surface 5a are formed in a substantially swept wing shape (or a substantially boomerang shape).

The second step surface 4b of the step surface 4 is connected to a substantially central portion of the rear step surface 8 of the first step surface 4a by a connecting portion 4c. The contour line 12, which is a step surface having a step G1 with respect to the base surface 3 of the second step surface 4b, is located between the rear end surface 2b and the position near the rear end surface 2b. It has a small width on the upstream side in the inflow direction a, and is formed in a substantially tapered shape that becomes larger as it goes downstream. Further, the second rail surface 5b of the rail surface 5 is disposed on the second step surface 4b at a predetermined distance from a substantially central portion of the rear step surface 9 of the first rail surface 5a. The second rail surface 5b
The contour line 13, which is a step surface having a step G2 with respect to the second step surface 4b, has a small width on the upstream side in the inflow direction a of the air flow AS, and is formed in a substantially tapered shape that becomes larger as it goes downstream. I have. However, one side surface 2c side of the slider body 2 is defined as an inner peripheral side IS of the hard disk 35,
When the other side surface 2d is used as the outer peripheral side OS of the hard disk 35, the inner peripheral side I of the contour 13 of the second rail surface 5b is set.
S has a concave portion 13a. The head chip of the magnetic head 14 is exposed on the slider center P at a position away from the rear end of the second rail surface 5b by, for example, 30 μm forward.

Then, the first and second step surfaces 4a,
First and second rail surfaces 5 within contour lines 10 and 12 of 4b
The outlines 11 and 13 of a and 5b are included. Then, the front step surface 6 of the first step surface 4a and the base surface 3
And the front step surface 7 of the first rail surface 5a
The corner between the first step surface 4a and the positive pressure generating unit 1
5, a corner portion between the rear step surfaces 8, 9 of the first step surface 4 a and the first rail surface 5 a and the base surface 3 is formed in the negative pressure generating portion 16.

Then, as described with reference to FIG.
Front end surface 2a of the slider body 2 of the head slider 1 flying upstream in the inflow direction a of the airflow AS generated on the surface of the recording surface of the hard disk which is driven to rotate at a high speed in the direction
Are oriented substantially at right angles, and the first and second rail surfaces 5a, 5b of the flying head slider 1 are pressed substantially at right angles from the direction of arrow d by the spring force of the suspension 33 onto the airflow AS. As a result, a positive pressure is generated by the positive pressure generating unit 15, and the first and second rail surfaces 5a and 5b are given an elevation angle toward the upstream side in the inflow direction a of the airflow AS, and the first And a second rail surface 5a,
5b is the flying height H from the recording surface 35a of the hard disk 35.
And the first and second rail surfaces 5 against the recording surface 35a due to the negative pressure generated by the negative pressure generating unit 16.
The magnetic head 14 is configured to record and reproduce information on the recording surface 35a so as to optimize the flying height H of a and b.

At this time, the slider size of the flying head slider 1 is configured to be 30% (pico slider), the hard disk 35 is designed to rotate at a high speed of 2,700 rpm or the like, and the floating head by the spring force of the suspension 33 is used. The pressing load of the slider 1 in the direction of the arrow d is 3 gf
In the case of (IS unit), the flying height H of the flying head slider 1 with respect to the recording surface 35a is configured to be 20 nm.

By the way, the base surface 3 of the slider body 2
The first and second step surfaces 4a and 4b, the first and second rail surfaces 5a and 5b are formed by the first and second rail surfaces 5a and 5b.
a, 5b as the uppermost reference plane,
From the rail surfaces 5a, 5b, the outer peripheral portions of the contour lines 11, 13 are dug down to a step G2. Then, the outer peripheral portions of the contour lines 10, 12 of the first and second step surfaces 4a, 4b are stepped G1.
As described above, the step G is formed on the base surface 3 by digging down by a processing method such as ion etching.
The first and second step surfaces 4a and 4b are formed, and a step G2 is formed on the first and second step surfaces 4a and 4b.
Generally, the first and second rail surfaces 5a and 5b are formed.

According to the basic structure of the flying head slider 1 of the present invention thus constructed,
By rotating at a high speed of 700 rpm, the inflow speed of the air flow AS also becomes almost the same high speed. However, the dust DS flowing into the air flow AS is mixed with the front step surfaces 6, 7 of the first step surface 4a and the first rail surface 5a.
To make them almost along the parabola,
Can be smoothly discharged to both sides of the step surface 4a and the first rail surface 5a.
Dust DS discharged to both sides along the
6 can be prevented as much as possible. Also, the second
The concave portion 13a formed on the inner peripheral side IS of the contour line 13 of the rail surface 5b has an effect of suppressing the minus skew angle -θ of the flying head slider 1 within a certain limit.

However, in the basic configuration of the flying head slider 1 according to the present invention having the above-described structure, the center portion is formed between the first step surface 4a and the rear step surface 8, 9 of the first rail surface 5a. In P1 and both side portions P2, there is a very large portion (refers to an interval of 30 μm to 40 μm or more) of the interval S2 in the front-rear direction between them. In the middle part,
There is no rear step surface 8 on the first step surface 4a, and the front end of the second step surface 4b is connected to the connection portion 4 on the first step surface 4a.
c. Also, the second step surface 4
In both corner portions P3 on the downstream side of the contour lines 12 and 13 of the second rail surface 5b and the second rail surface 5b, there is an extremely large space S3 between them in the front-rear direction.

For this reason, when the dust DS mixed with the airflow AS whose inflow velocity is high flows over the first and second rail surfaces 5a and 5b and flows down in the direction of arrow a, as shown in FIG. The dust DS is entrained by the eddy current ws described in FIG. 14, and as shown by parallel lines at small intervals in FIG. 8, the first and second step surfaces 4a and 4b are placed on the above-mentioned respective points P1, P2 and P3. It was experimentally confirmed that dust DS was easily attached.

In particular, in the case where the intervals S2 and S3 between the points P1, P2 and P3 are enlarged as in the modification shown in FIG. 9, the dust DS is added to the places indicated by the small parallel lines in FIG.
Are more easily adhered.

Therefore, as shown in FIG. 6 and FIG.
When the connecting portion 4c between the step surface 4a and the tip of the second step surface 4b is cut off and a recess 4d is formed in this portion, dust adhered on the first step surface 4a at the central portion P1. DS deposition was minimized. Also, the first
The more the step (depth) G3 of the base surface 3 with respect to the second rail surfaces 5a and 5b is increased, the more each of the above-mentioned portions P1,
First and second step surfaces 4a, 4b at P2, P3
It was experimentally confirmed that the adhesion of dust DS to the top was reduced.

"First Embodiment of the Flying Head Slider of the Present Invention" A first embodiment of the flying head slider 1 of the present invention will be described with reference to FIGS.
First, the step G1 of the base surface 3 with respect to the first and second rail surfaces 5a and 5b is configured to be as deep as 2 μm to 10 μm. At that time, the step (depth) G1 of the base surface 3 with respect to the first and second step surfaces 4a and 4b is set to be deep to 3 μm, and the first and second steps with respect to the first and second rail surfaces 5a and 5b. The step (depth) G2 of the step surfaces 4a and 4b is set to 0.4 μm.

Next, a rear step surface 9 for forming a step with respect to the first rail surface 5a and the first step surface 4a,
A rear step surface 9 forming a step between the step surface 4a and the base surface 3, and a rear side of the contour line 13 which is a rear step surface forming a step between the second rail surface 5b and the second step surface 4b. The distance S4, S5 in the front-rear direction between the second step surface 4b and the rear side of the contour line 12, which is a rear step surface forming a step with respect to the base surface 3, is set to 10 μm or less. The interval S6 between the rear corner portions of the contour lines 12 and 13 is also set to 10 μm or less. In addition,
In consideration of the processing procedure and the processing time such as the ion etching of the step surface 4 and the base surface 3 with respect to the rail surface 5, the limit is Max 10 μm or less.

Then, as described above, the intervals S4, S
5, S6 and S3 described in the basic components
By minimizing the interval to a very small interval of 1/4 to 1/3 or less as compared with the air flow AS, as shown in FIG.
Is flowing at high speed in the direction of arrow a,
2. The swirl ws of the air flow AS is hardly generated in the portions P2 and P3.
2, it becomes difficult to adhere to the first and second step surfaces 4a, 4b of P3. Therefore, the first of the points P2 and P3
The dust DS adhered and deposited on the second step surfaces 4a and 4b eventually peels off and flows down, is sandwiched between the second rail surface 5a and the recording surface of the hard disk, and the floating head slider 1 flies. It is possible to prevent a situation in which the posture becomes unstable and a recording / reproducing defect of information is caused, or both are crashed.

[Second Embodiment of the Flying Head Slider of the Present Invention] Next, referring to FIGS. 4 and 5, a second embodiment of the flying head slider 1 of the present invention will be described.
First, as shown in FIG.
The outlines 11 and 13 of a and 5b and the outlines 10 and 12 of the first and second step surfaces 4a and 4b are executed in two steps of ion etching, and two masks 21 and 22 are used. . Then, first, the first and second rail surfaces 5
First mask 2 for processing contour lines 11 and 13 of a and 5b
In FIG. 1, the mask portions 23a and 23b for processing the contour lines are formed, and then the first and second step surfaces 4a and 4b are formed.
The second mask 22 for processing the outlines 10 and 12 of b is formed with outline processing mask portions 24a and 24b.

Therefore, the downstream side in the inflow direction a of the air flow AS, which is the rear side of the contour processing mask portion 23a of the first mask 22, is moved to the contour processing mask portion 2a of the second mask 22.
The first and second rail surfaces 5a, 5b and 2a are deflected from the downstream side of the air flow AS, which is the rear side of the air flow AS, to the downstream side in two steps using these two masks 22, 23. When the first and second step surfaces 4a and 4b are ion-etched, the two contour processing mask portions 23a and 24 are formed.
In the downstream portion where a overlaps, a new face 25 having a counterbore shape is provided.
Is formed, and the effect that the first step surface 4a does not exist downstream of the first rail surface 5a can be obtained. In this case, the depth of the new surface 25 becomes 3 μm or more by setting the depth of the base surface 3 to be dug down to 3 μm or more + the depth of the step surface 4a. However, such an ion etching method using two masks 21 and 22 requires high accuracy.

"Third Embodiment of the Flying Head Slider of the Present Invention" Next, referring to FIG. 6, a third embodiment of the flying head slider 1 of the present invention will be described. In this case, first, the second Step surface 4b and second rail surface 5b
Of the contour lines 12, 13 of the air flow AS in the inflow direction a of the airflow AS are cut off together at the time of cutting the rear end face 2b of the slider body 2, so that a step is formed on the downstream side of these contour lines 12, 13. Process so that it does not occur.

Next, both sides on the downstream side of these contour lines 12 and 13 are dug down by, for example, about 50 μm below the base surface 3 along the tapered contour line 28 by machining or the like to form a deep recess 29. It is formed. It is preferable to use a rotating grindstone for this machining, and the contour line 28 can be machined into a tapered straight line with high accuracy.

When the tapered and straight contour lines 28 are formed on both sides on the downstream side of the contour lines 12 and 13 as described above, the portion is formed on the downstream side of the second rail surface 5b. The second step surface 4b no longer exists, and no dust DS adheres or accumulates at that portion.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the technical concept of the present invention.

The flying head slider of the present invention having the above-described structure is located on the rail surface and the step surface on the downstream side in the inflow direction of the air flow, and has a step with respect to the step surface and the base surface. The space between the two rear step surfaces in the direction of inflow of the air flow is set to a small distance of 10 μm or less, so that even if the rotation speed of the storage medium is increased, the air flow is downstream of these two rear step surfaces. Almost no vortex is generated, and dust is less likely to adhere to the downstream side of the two rear step surfaces, so that the flying attitude of the flying head slider can be stabilized, and information can be recorded. It is possible to prevent a re-defect, a crash between the flying head slider and the recording medium, etc., and to provide a flying head slider and a disk drive device with high quality and high reliability.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a flying head slider according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional side view illustrating a main part of FIG.

FIG. 3 is a perspective view of FIG.

FIG. 4 is a plan view illustrating a flying head slider according to a second embodiment of the present invention.

FIG. 5 is a plan view of a mask for ion etching the flying head slider of FIG. 4;

FIG. 6 is a plan view illustrating a flying head slider according to a third embodiment of the present invention.

FIG. 7 is a plan view in a case where the basic configuration of the flying head slider of the present invention is developed.

FIG. 8 is a plan view illustrating a basic configuration of a flying head slider of the present invention.

FIG. 9 is a plan view illustrating a modification of the basic configuration of the flying head slider of the present invention.

FIG. 10 is a perspective view illustrating a conventional general R-HDD.

FIG. 11 is a plan view illustrating a skew angle of a flying head slider in the R-HDD.

FIG. 12 is a perspective view illustrating a general flying head slider used in the R-HDD according to the first embodiment.

FIG. 13 is a sectional side view for explaining a flying operation of the flying head slider with respect to the hard disk.

FIG. 14 is an enlarged cross-sectional side view of a main part explaining how dust adheres to the downstream side of the step surface of the flying head slider and the like.

[Explanation of symbols]

1 is a flying head slider, 2 is a slider body, 3 is a base surface, 4 is a step surface, 4a is a first step surface, 4b
Is the second step surface, 5 is the rail surface, 5a is the first rail surface, 5b is the second rail surface, 8 is the rear step surface of the step surface, 9 is the rear step surface of the rail surface, 10 is The contour of the first step surface 4a, 11 is the contour of the first rail surface 5a, 12 is the contour of the step surface of the second step surface 4b, and 13 is the step surface of the second rail surface 5b. An outline,
Reference numeral 15 denotes a positive pressure generator, 16 denotes a negative pressure generator, 21 denotes a magneto-optical disk as a storage medium, R-HDD denotes a removable hard disk drive as a disk drive, and 35 denotes a hard disk as a storage medium.

Claims (4)

[Claims] 1. A flying head slider which records and / or reproduces information while flying on the storage medium by an air flow generated by rotation of the storage medium. An opposing base surface, a step surface formed in a substantially parallel plane having a step on the base surface, and a step on the step surface at a position slightly displaced downstream in the inflow direction of the airflow. A rear step surface which is located on the downstream side in the inflow direction of the air flow of the rail surface and forms a step with respect to the step surface; and The distance between the air flow direction and the rear step surface which is located on the downstream side in the air flow direction of the air flow and forms a step with respect to the base surface is 10 μm or less. Flying head slider, characterized in that. 2. A flying head slider which records and / or reproduces information while flying on the storage medium by an air flow generated by rotation of the storage medium. An opposing base surface, a step surface formed in a substantially parallel plane having a step on the base surface, and a step on the step surface at a position slightly displaced downstream in the inflow direction of the airflow. A rail surface formed in a substantially parallel plane shape having a front step surface and a rear step surface located upstream and downstream in the inflow direction of the airflow of the step surface and the rail surface. The base surface is formed so as to be curved substantially along a parabola from a substantially central portion to both side portions in a width direction of the base surface as proceeding to the downstream side, and is opposed to the step surface of the rail surface. The gap in the inflow direction of the air flow between the rear step surface forming the step and the step surface forming the step with respect to the base surface is set to 10 μm or less. Flying head slider. 3. A flying head slider which records and / or reproduces information while flying on the storage medium by an air flow generated by rotation of the storage medium. First and second steps formed in a substantially parallel plane having a step at positions opposed to the base surface facing the upstream side and the downstream side in the inflow direction of the air flow on the base surface; A first rail surface formed as a substantially parallel surface having a step at a position slightly deviated downstream in the inflow direction of the air flow on the step surface; and the first and second rails. A second rail surface formed in a substantially parallel plane shape having a step at a position deviated from the first rail surface on the step surface to the downstream side in the inflow direction of the airflow from the first rail surface; 1 step surface and As the front step surface and the rear step surface located on the upstream side and the downstream side of the first rail surface in the inflow direction of the air flow progress toward the downstream side, the base surface is substantially at the center from both sides in the width direction. The second step surface and the second rail surface have a small width on the upstream side in the inflow direction of the air flow, and are substantially increased toward the downstream side. A rear step surface that forms a step with respect to the first and second step surfaces of the first and second rail surfaces;
A flying head slider, wherein an interval in the inflow direction of the air flow between the second step surface and a rear step surface forming a step with respect to the base surface is 10 μm or less. 4. A floating head slider according to claim 1, 2 or 3, which is supported by a rotary head actuator via a suspension, and the floating head slider causes the floating head slider to be compressed by air in the storage medium. A disk drive device configured to be pressed upstream.