JP2802680B2 - Magnetic head slider - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head slider used for a floating magnetic head of a disk drive such as a magnetic disk drive and a magneto-optical disk drive.

[Conventional technology]

As a bias magnetic field generator for applying a bias magnetic field for a magneto-optical disk, one having a structure similar to that of a slider-type magnetic head used in a hard disk device has been conventionally known (for example, INTERNATIONAL SYMPOSIUM ON).
OPTICAL MEMORY 1987 Sep.T.NAKAO etc.).

FIG. 7 is an enlarged perspective view showing a structure around a slider type magnetic head of a conventional magneto-optical disk drive. Referring to FIG. 1, reference numeral 1 denotes a disk-shaped magneto-optical disk (hereinafter, referred to as a disk). I'm coming. The magnetic head 2 has a rectangular flat plate shape, and its slider 21 has an air inflow side thinner by about several μm.
And a bulkhead 24, which is a bias magnetic field generating unit, including a U-shaped core 22 buried in the center of the outflow side end of the slider 21 and a coil 23 wound around one side of the core 22. . The slider 21 of the magnetic head 2 is attached to the support arm 5 via the gimbal spring 4 and the gimbal spring 4
Pitching from the magnetic head 2 to the support arm 5 with a pivot (not shown) formed in
(Rotation around the radial direction of the disk 1) and rolling (rotation around the circumferential direction of the disk 1). This swing allows the disk 1 to follow the surface runout. Further, the magnetic head 2 can be moved in the radial direction of the disk 1 by the reciprocating operation of the support arm 5.

The optical head 3 faces the lower surface of the disk 1 facing the bias magnetic field generation location of the bulk head 24, and heats the bias magnetic field generation area at the time of recording or erasing to form a reversal magnetic domain.

FIG. 8 is a schematic enlarged view showing the structure of a conventional slider 21. FIG. 8 (a) shows a side view, and FIG. 8 (b) shows a bottom view. Slider 21 is 10mm long and 8m wide
m, a plate having a thickness of about 1 mm, into which air flows in from the longitudinal direction indicated by the white arrow as the disk 1 rotates. The bottom surface of the slider 21 is approximately 0.4 to
A taper portion 25 formed at an angle θ (≒ 14.5 mrad) is provided over substantially the entire width from a position facing the outflow side of 0.8 mm toward the end face. Also, two grooves 26, 26 are formed in the longitudinal direction across the bottom center. The bulkhead 24 is embedded in the center of the air outflow side end surface as described above.

[Problems to be solved by the invention]

In the slider 21 thus configured, the tapered portion 25
When the air flows into the disk 1, the flow of the air is restricted and a dynamic pressure is generated, and buoyancy in a direction away from the disk 1 is generated.

On the other hand, the disk 1 always moves up and down due to surface runout,
Accordingly, the slider 21 performs a rolling and pitching motion. At this time, the tip of the slider 21 is
As shown by hatching in FIG. 8, foreign matter such as dust adhering on the disc 1
10 may adhere. When foreign matter 10 adheres to the tip,
For example, Mikio Tokuyama et al., "Flying characteristics of slider when dust adheres", Transactions of the Japan Society of Mechanical Engineers, Vol. 53, No. 488, Paper No. 86-
As shown in 1058B, the flying characteristics of the slider 21 are degraded and the flying height is reduced. Especially in a magneto-optical disk drive, the disk 1 can be replaced unlike a magnetic disk drive capable of sealing the inside of the device. Therefore, since the inside of the apparatus is open to the atmosphere, the foreign matter 10 easily adheres to the disk 1, and the foreign matter 10
Is more easily attached to the tip.

When the flying height is small, the slider 21 easily comes into contact with the disk 1, and in the worst case, the surface of the disk 1 may be damaged, and the reliability of the apparatus is impaired.

On the other hand, the conventional slider is provided with a tapered portion 25 over substantially the entire width on the air inflow side, and the center of the dynamic pressure is the tapered portion 25.
A position nearby indicated at A _1, A ₂ of from 25 to稍空gas outflow side. Accordingly, when following the surface deflection of the disk performing the rolling motion, the position of the center of the dynamic pressure, subjected to stability influence of rolling motion, the position A ₁ same A ₂ and slider
The stability gets worse as we approach the center of 21. If the stability of the rolling motion is deteriorated, the slider 21 collides with the disk 1 and damages the disk 1.
In particular, at the time of loading / unloading, the dynamic pressure is low and the flying height is small, so if the stability of the rolling motion is poor, the frequency of collision increases.

Further, in the pitching motion, if the stability is deteriorated, the distance (floating amount) between the bulkhead 24 and the disk 1 fluctuates, causing collision with the disk 1 and fluctuation of the applied magnetic field, etc. 1 cannot be accurately recorded.

The present invention has been made in view of such circumstances, and includes a slope A having tapered portions formed on both sides of the slider with substantially the same width, and a slope B formed between the slopes and having a slope smaller than the slope A. By providing the magnetic head slider, the center position of the dynamic pressure is separated as much as possible on both sides, and the dynamic pressure acting thereon is increased, whereby the stability during rolling and pitching movement is improved. Is to do.

[Means for solving the problem]

2. The magnetic head slider according to claim 1, wherein the magnetic head slider has a plate-like shape, and has a groove extending from one end to the other end of one surface, and tapered portions on both sides of the groove which become thinner toward the one end. In the magnetic head slider, the one surface is opposed to a rotating disk, and the magnetic head slider moves in a direction away from the disk by dynamic pressure of air flowing from the one end to the tapered portion by rotation of the disk. The tapered portion has an inclined surface A having the same width on both sides of the groove and on both sides in a direction intersecting the air inflow direction.
And an inclined surface B formed between the inclined surface A and having a gentler inclination than the inclined surface A.

The magnetic head slider according to the present invention is characterized in that the inclined surface A has a plurality of inclined surface portions having different inclination angles along the air inflow direction.

In the magnetic head slider according to the third aspect of the present invention, the tapered portion has a plurality of inclined surfaces having the same width on both sides in a direction intersecting with the air inflow direction and having different inclination angles along the air inflow direction. A crown that rises highest at the center of the plate and gradually decreases toward both ends from the rear end of the plate between the rear end of the inclined surface in the air inflow direction and the rear end of the plate. It is characterized by.

[Action]

In the present invention, by providing the inclined surface B having a gentler inclination than the inclined surface A between the inclined surfaces A, the dynamic pressure is increased, and the air inflow side of the slider flies higher than the outflow side,
The stability of pitching motion is improved and the slope A
The action of rolling improves the stability of the rolling motion.

Further, in the present invention, the provision of the crown reduces the outflow of air to the side, increases the flying height, and improves the dust resistance.

〔Example〕

Hereinafter, the present invention will be described with reference to the drawings showing the embodiments.

FIG. 1 is an enlarged perspective view showing a structure around a magnetic head of a magneto-optical disk drive using a slider of the present invention. In FIG. 1, reference numeral 1 denotes a disk-shaped magneto-optical disk (hereinafter, referred to as a disk). On the upper surface of the disk 1, a dynamic pressure of several μm to
The magnetic head 2 floating over 10 μm is facing. The magnetic head 2 has a rectangular flat plate shape, and has a slider 21 whose air inflow side is thinned by about several μm, a U-shaped core 22 buried in the center of an end of the slider 21 on the outflow side, and one side of the core 22. And a bulk head 24 serving as a bias magnetic field generating unit including the wound coil 23. The slider 21 of the magnetic head 2 is attached to the support arm 5 via the gimbal spring 4, and the magnetic head 2 is pitched with respect to the support arm 5 with a pivot (not shown) formed on the gimbal spring 4 (in the radial direction of the disk 1). (Swinging) and rolling (swinging around the circumferential direction of the disk 1). This swing allows the disk 1 to follow the surface runout. Further, the magnetic head 2 can be moved in the radial direction of the disk 1 by the reciprocating operation of the support arm 5.

The optical head 3 faces the lower surface of the disk 1 facing the bias magnetic field generation location of the bulk head 24, and heats the bias magnetic field generation area at the time of recording or erasing to form a reversal magnetic domain.

FIG. 2 is a schematic enlarged view showing the structure of the first embodiment of the slider 21 of the present invention. FIG. 2 (a) is a side view, and FIG. 2 (b) is a bottom view. ing. Slider 21
Is a flat plate having a length of about 10 mm, a width of about 8 mm and a thickness of about 1 mm, into which air flows in from the direction indicated by the white arrow as the disc 1 rotates. 0.8m from the end face of slider 21
m The first inclined surfaces 25a, 25a are tapered at a taper angle θ ₁ (≒ 14.5 mrad) from the position facing the outflow side to the position facing the outflow side approximately 0.4 mm from the end face, and from there toward the end face, the taper angle is increased. The second inclined surfaces 25b, 25b are formed at θ ₂ (rad29 mrad), respectively, and the tapered portions 25 are formed by them.
The first and second inclined surfaces 25a, 25b ... widthwise length of the b _1, b ₂ is sufficiently longer than 1/4 the width of the slider 21 from both sides of the slider 21, and has a b ₁ ≒ b _2. The first and second inclined surfaces 25a and 25b are not formed at the center of the slider 21 in the width direction, and have two grooves 26 and 26 and a taper angle θ ₃ (≒ 21.8 mrad) are formed.

Since the grooves 26, 26 do not generate dynamic pressure, the dynamic pressure generating portion is divided into left and right sides in the air inflow direction, so that the left-right balance characteristics during floating can be improved.

The bulkhead 24 is buried on the outflow side as described above. The slider 21 configured as described above
When the tip comes into contact with the disk 1, foreign matter hardly adheres to the first inclined surface 25a, and adheres to the second inclined surface 25b. The floating characteristics of the first inclined surface 25a are dominantly determined not by the second inclined surface 25b but by the first inclined surface 25a.
5a has the same shape as before the foreign matter 10 is attached,
The flying characteristics of the sample hardly change.

FIG. 3 is a graph showing the relationship between the taper angle of the inclined surface and the followability and the minimum clearance of the slider. The minimum clearance H _min is shown on the left vertical axis, the followability ΔH / A is shown on the right vertical axis, and the horizontal axis is shown. Has a taper angle θ. Here, the minimum clearance H _min is a representative index indicating the flying characteristics, and indicates the flying height (μm) of the lower end of the slider from above the disk 1. The followability indicates the variation ΔH of the flying height and the surface runout A Divided by. Then, in the case of the present example in which the disk drive 1 is operated in an open state to the atmosphere, in order to prevent contact between the disk 1 and the magnetic head 2, the taper angle of the inclined surface is as large as possible in the flying height, and the follow-up property ΔH It is necessary to choose where the value of / A is as small as possible.
In order to realize this, it is necessary to select the taper angle θ in a relatively wide range of 6 to 30 mrad, as is apparent from FIG.
It can be seen that the selection is such that the flying height is large and the change in the followability is small. Therefore, in this embodiment, the taper angle θ
₁ , θ ₂ and θ ₃ were set to 14.5, 29 and 21.8 mrad, respectively.

Next, a second embodiment will be described. FIG. 4 is a schematic enlarged view showing the structure of the slider 21 of the second embodiment.
FIG. 4 (a) shows a side view, and FIG. 4 (b) shows a bottom view.

In the second embodiment differs from the first embodiment, the width direction length of the first and second inclined surfaces 25a, the width direction of 25b length b ₁ or the b ₂ (b ₁ ≒ b ₂₎ flank 27 substantially it has the same dimensions as the b ₃ or the _{b 4 (b 3 ≒ b 4} ). Therefore widthwise length of the inclined surfaces 25a as shown in FIG. 4, the width direction length b _1, b ₂ and 25b each inclined surface 25a shown in FIG. 2, 25b
It is smaller than b ₁ and b ₂ . As a result, the center of the dynamic pressure moves outward in the width direction of the slider 21 as compared with the first embodiment, and the stability during the rolling movement is improved. The other structures and the flying characteristics with respect to foreign matter are substantially the same as those of the first embodiment, and therefore description thereof is omitted.

In the first and second embodiments, the taper angles θ ₁ ,
The case where θ ₂ and θ ₃ are 14.5, 29 and 21.8 mrad respectively are shown,
The present invention is not limited to this, and the taper angle is 6 to 30 mr.
Any angle combination is possible as long as it is in the range of ad and θ ₂ > θ ₃ > θ ₁ .

The flank width direction length b ₁ of the inclined surface in the second embodiment
Although almost been the same dimension as the width direction length b ₃ of 27 may be any size smaller than b ₁ shown in the first embodiment.

Next, a third embodiment will be described. FIG. 5 is a schematic enlarged view showing the structure of the slider 21 of the third embodiment.
FIG. 5 (a) shows a side view, and FIG. 5 (b) shows a bottom view. The slider 21 of the third embodiment has a lower surface protruding in a crown shape from the end of the first inclined surface 25a toward the end surface on the outflow side. This is to obtain a large flying height, and the workability is worse than that of the second embodiment.
Although the processing cost is increased, the flying height can be increased, so that the dust resistance is improved. The other configuration is the same as that of the second embodiment, and the description is omitted.

Further, in the above three embodiments, the plurality of inclined surfaces of the tapered portion have substantially the same length in the air flow direction, but the present invention is not limited to this, and these lengths may be different from each other. Good.

Next, a fourth embodiment will be described with reference to the drawings. FIG. 6 is a schematic enlarged view showing the structure of the embodiment of the magnetic head slider according to the present invention. FIG. 6 (a) is a side view, and FIG. 6 (b) is a bottom view. I have.

The slider 21 is formed in a flat plate shape having a length of about 10 mm, a width of about 8 mm, and a thickness of about 1 mm, into which air flows in the direction indicated by the arrow as the disk 1 rotates. A tapered portion having a taper angle θ ₁ (≒ 29 mrad) and a length C ₁ in the width direction from a position approximately 0.4 mm from the air inlet side end surface on both sides of the slider 21 to the end surface.
25 are formed, and a taper angle θ ₂ (≒ 14.5
mrad) and the flank 27 is formed in the width direction length C ₂ (C ₂ ≒ C ₁ ). At the center in the width direction, two grooves 26, 26 are formed over the entire length in the longitudinal direction.

In the slider 21 configured as described above, since the taper portions 25 that determine the flying characteristics are formed on both sides of the slider 21, the center of the dynamic pressure connected to the outflow side of the taper portion 25 is located outside, and the rolling Exercise stability is improved.

In this embodiment, the taper angle is 29 at the taper portion.
mrad and 14.5 mrad in the flank,
-30 mrad, and may be any value as long as the taper angle of the tapered portion is larger than the taper angle of the flank.

Further, although the approximately same in size and width C ₂ of the flank width C ₁ of the tapered portion may be of any size not limited thereto.

 Next, a fifth embodiment will be described with reference to the drawings.

FIG. 9 is an enlarged schematic view showing the structure of the magnetic head slider according to the present invention. FIG. 9 (a) shows a side view, and FIG. 9 (b) shows a bottom view.

The slider 21 is formed in a flat plate shape having a length of about 10 mm, a width of about 8 mm, and a thickness of about 1 mm, into which air flows in the direction indicated by the arrow as the disk 1 rotates. L from the air inflow side of the slider
(≒ 0.76 mm) A tapered portion 25 is formed from the first position toward the outflow side to the end face. The taper portion 25 has a taper angle θ ₁ (≒ 14.5 mrad) and widths b ₁ and b ₂ (≒ 2.07 mm) in the width direction.
The first inclined surfaces 25a, 25a formed on both sides with the first inclined surface 2
5a, 25a and a second inclined surface 25b formed at a taper angle θ ₃ (≒ 7.25 mrad). The second inclined surface 25b is composed of first portions 25b ₁ and 25b ₁ having lengths b ₃ and b ₄ (≒ 1.03 mm) in the width direction and a second portion 25b _{2 at} the center. 2nd slope
The first portion 25b ₁ and 25b and between the second portion 25b ₂ are formed two grooves 26, 26 in the longitudinal direction of the length of the slider 21. The core 22 and coil are located at the center of the air outlet side.
A bulkhead 24 consisting of 23 is embedded.

In the slider 21 configured as described above, the tapered portion 25 that determines the flying characteristics is formed over substantially the entire width of the slider 21, and the tapered portion 25 is provided with the first inclined surface 25a.
Substantially central axis center of dynamic pressure connected to the outlet side of the tapered portion 25 which is configured of a width b _1, b ₂ of the first inclined surface 25a, 25a at it from a gentle second inclined surface 25b inclined There are a total of three locations on the central axis of the upper two locations and the widths b ₃ , b ₄ of the second inclined surfaces 25b, and mainly the center of the dynamic pressure related to the first inclined surfaces 25a, 25a during the rolling motion. Stability is improved.

In addition, the dynamic pressure generated at three locations in the central portion 25b increases the overall dynamic pressure, so that the air inflow side of the slider 21 rises from the air outflow side when air flows in, and the angle between the slider 21 and the disk 1 at the time of floating is increased. A certain pitch angle has a larger value,
Even if there is a disk disturbance, the squeeze effect works more effectively, so that the stability during the pitching movement is improved.

FIG. 10 is a schematic enlarged view showing the structure of the magnetic head slider according to the sixth embodiment. FIG. 10 (a) is a side view, and FIG. 10 (b) is a bottom view. . In this embodiment the first sloped surface 25a, the width direction 25a length _{b 1, b 2 (≒ 2.07mm} )
It constitutes the first portion 25a ₁ and the second portion 25a ₂ Prefecture of. The first portion 25a ₁ is formed with a taper angle theta ₁ from the first position described above _{(≒ 14.5mrad),} the second portion 25a ₂ is first
Continuous with the portion 25a _1, and is formed with a taper angle θ _{2 (≒} 29mrad) from the second position described above. The second inclined surface 25
b has a structure similar to that of the fifth embodiment shown in FIG.

FIG. 11 is a schematic enlarged view showing the structure of the magnetic head slider according to the seventh embodiment. FIG. 11 (a) shows a side view, and FIG. 11 (b) shows a bottom view. . In this embodiment, the second inclined surface 25b is moved from the end face on the air inflow side by l (≒ 0.76 m
m) From the first position toward the outflow side, the taper angle θ ₃ (≒ 1
4.5 mrad) and from the first position
₁ (≒ 0.38 mm) the first portion 25a of the first inclined face 25a to a second position towards the inlet side _1, 25a ₁ taper angle theta _{1 (≒} 14.5
mrad) and the taper angle θ ₂ (≒ 29mra) from the second position.
d), width part length b ₁ , b ₂ (≒ 2.07mm) and second part on both sides
25a ₂ , 25a ₂ are formed up to the end face with a length l ₂ (≒ 0.38 mm).

 Other configurations are the same as those of the embodiment shown in FIG.

Also in this case, the stability during the rolling motion and the pitching motion is improved as in the above-described embodiment.

As described above, in this embodiment, the first inclined surface 25a is composed of the _two portions 25a ₁ and 25a _2, so that the functions and effects of the first embodiment are included, and the foreign matter is formed on the second portion 25a ₂ . since adhesion, no attachment to the first portion 25a _1, even for adhesion of foreign matters, the stability is not impaired.

FIG. 12 is a schematic enlarged view showing the structure of the magnetic head slider according to the eighth embodiment. FIG. 12 (a) shows a side view, and FIG. 12 (b) shows a bottom view. . In this embodiment, there is no groove at the bottom and the second inclined surface 25b is a flat surface. In a slider having the same outer dimensions, a structure without a groove has a larger flying height than a structure with a groove. The groove originally suppresses the generation of dynamic pressure as described above, divides the dynamic pressure generation part into left and right in the air inflow direction, and improves the left-right balance characteristics when flying, but the taper surface is the slider
When formed on both sides of 21, the left and right balance characteristics can be improved. Therefore, the balance between left and right is better than that of a single taper.

Other configurations and operations are the same as those of the sixth embodiment shown in FIG. 10, and the description is omitted.

Next, an example of improving the followability of the rolling and pitching motion according to the present invention will be described.

FIGS. 13 and 14 are graphs respectively showing the relationship between the frequency f of the surface deflection and the followability ΔH / A of the rolling motion and the pitching motion (undulation motion of the disk), and the vertical axis shows the followability ΔH / A. , And the horizontal axis represents the plane runout frequency f (Hz).

The thick solid line represents the conventional magnetic head slider shown in FIG. 8, the two-dot chain line represents the magnetic head slider of the embodiment shown in FIG. 6, the thin solid line represents the magnetic head slider of the embodiment shown in FIG. The dotted line indicates the magnetic head slider of the embodiment shown in FIG. 10, and the broken line indicates the magnetic head slider of the embodiment shown in FIG. The peripheral speed of the disk 1 at this time is 13.1 m / sec.

As is apparent from FIG. 13, the magnetic head slider of the embodiment shown by the two-dot chain line has a significantly improved rolling characteristic over the entire frequency range due to the action of the tapered portions 25, 25 at both ends. As described above, the pitching (undulation) characteristics are significantly improved in the high frequency region of 100 Hz or higher, but are slightly improved in the low frequency region of 40 to 100 Hz as compared with the conventional example, and the overall balance is too small. not good.

On the other hand, in any case shown by the thin solid line, the broken line, and the one-dot chain line,
It can be seen that the followability of the rolling and pitching (undulating) motions is well-balanced and good over the entire frequency range, and that the stability during the rolling motion and the pitching (undulating) motion is improved.

That is, for example, in FIG. 9 to FIG.
Slope 25b ₁ (Slope B), which is gentler than (Slope A)
With such a configuration, such a specific effect can be obtained.

The relationship between the inclined surface A and the inclined surface B is 25b and 27 in FIGS. 2, 4, and 5, respectively, and 25 and 2 in FIG.
Equivalent to 7.

In the description of the present invention, the taper angle of the first inclined surface is set to 1
4.5 ° or 29 °, the taper angle of the second inclined surface is 7.25 ° or 14.
Although 5 ° is merely an example, these taper angles are in the range of 6 ° to 30 °, and what value is provided if the taper angle of the first inclined surface is larger than the taper angle of the second inclined surface. May be.

In the above description, the example in which the magnetic head is a bulk head has been described, but the present invention is not limited to this.
It goes without saying that the present invention can be applied to a thin film head.

Further, in the above description, the present invention has been described by taking a magneto-optical disk drive as an example, but the present invention is not limited to this, and it goes without saying that the present invention can also be used for a fixed magnetic disk drive that is open to the atmosphere.

In the description of the above embodiment, the number of the grooves is two, the flat surface is at three places, and the head is arranged at the narrowest portion at the center. However, the invention is not limited to this, and the groove is one. It is needless to say that the present invention can be similarly applied to a slider having two or one flat surface, and a head having a flat surface.

〔The invention's effect〕

As described above, according to the present invention, the inclined surfaces A are formed on both sides of the slider, and the inclined surfaces A are formed therebetween.
Since the inclined surface B having a gentler inclination is provided, the generated dynamic pressure is increased, and there is an effect that the stability during the rolling motion is improved and the stability during the pitching motion is improved.

In addition, the flying height is increased by providing the crown,
There is also an effect of improving dust resistance.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a structure around a magnetic head of a magneto-optical disk drive using a slider of the present invention, FIG. 2 is a schematic enlarged view showing a structure of an embodiment of the slider of the present invention, and FIG. FIG. 4 is a graph for selecting an optimum taper angle, FIG. 4 is a schematic enlarged view showing a structure of a slider according to another embodiment of the present invention, and FIG. 5 is a structure of a slider according to still another embodiment of the present invention. FIG. 6 is a schematic enlarged view showing the structure of still another embodiment of the slider of the present invention, and FIG. 7 is a diagram showing the structure around a slider type magnetic head of a conventional magneto-optical drive device. FIG. 8 is a schematic enlarged view showing the structure of a conventional slider, FIG. 9 is a schematic enlarged view showing the structure of a slider according to still another embodiment of the present invention, and FIG. FIG. 11 is a schematic enlarged view showing the structure of still another embodiment of FIG. 11, and FIG. FIG. 12 is a schematic enlarged view showing the structure of still another embodiment, FIG. 13 is a graph showing the relationship between the followability of pitching (undulation of the disk) motion and the surface run-out frequency, FIG. 14 is a graph showing the relationship between the followability of rolling motion and the surface run-out frequency. DESCRIPTION OF SYMBOLS 1 ... Magneto-optical disk, 2 ... Magnetic head, 21 ... Slider, 25 ... Taper part, 25a, 25b, 25c ... First, second, third
Inclined surface In the drawings, the same reference numerals indicate the same or corresponding parts.

Continuation of front page (56) References JP-A-1-107386 (JP, A) JP-A-1-267822 (JP, A) JP-A-63-220488 (JP, A) JP-A-62-161022 (JP, A) Takeshi Nakao, Mashiro Ojima, Yoshinori Miyamura, Shigenori Okamine, Hiro fumi Sukeda, Norio Ohta and Yoshori Takis: Int. Sym p. On Optical Memory, 1987, JAPANESE JOURNAL OF APPLIED PHYSICS, Vol. 26 (1987) Supplement 26-4. (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 21/21 101 G11B 5/60

Claims (3)

(57) [Claims] 1. A plate-like shape having a groove extending from one end to the other end of one surface thereof, and a tapered portion that is thin toward the one end is formed on both sides of the groove. A magnetic head slider that faces a rotating disk and moves in a direction away from the disk by dynamic pressure of air flowing from the one end to the tapered portion by rotation of the disk, wherein the tapered portion is formed on both sides of the groove; And an inclined surface A formed at the same width on both sides in a direction intersecting with the air inflow direction, and an inclined surface B formed between the inclined surfaces A and having a gentler inclination than the inclined surface A. Characteristic magnetic head slider. 2. The magnetic head slider according to claim 1, wherein the inclined surface A has a plurality of inclined surface portions having different inclination angles along the air inflow direction. 3. The tapered portion has a plurality of inclined surfaces having the same width on both sides in a direction intersecting with the air inflow direction and having different inclination angles along the air inflow direction. 2. A crown as defined in claim 1, wherein a portion of the crown extending from the rear end in the direction to the rear end of the plate is highest at the center of the plate and gradually lowers toward both ends. Magnetic head slider.