JPH05334830A - Floating type magnetic head device - Google Patents

Abstract

PURPOSE:To obtain the floating type magnetic head device having a constant flying height characteristic by equipping a step part having a prescribed height on the air inflow side of a surface of a slider in opposition to a recording medium. CONSTITUTION:The step part 3 is formed in a shape of a planar triangle in the middle part of the surface 1a opposite to the magnetic recording medium of the slider of magneto-optical properties in a shape of a planar path over an area of the surface 1a from an air inflow end 1b to an outflow end 1c in the direction of an arrow X. That is, a linear step surface having a height of 0.5-5mum is formed over an area from the middle of the inflow end 1b to both right and left ends of the inflow end 1c. By this step, irrespective of any circumferential speed change of the recording medium at a skew angle QX, the slider 1 can be scanned on a signal recording area with a constant floating amt. against the magnetic medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head device used in a hard disk drive device or the like.

[0002]

2. Description of the Related Art Generally, a floating magnetic head device for recording / reproducing an information signal on / from a disk-shaped magnetic recording medium (hereinafter referred to as a magnetic recording medium) such as a hard disk is generated on the surface of the magnetic recording medium. And a magnetic body of the slider, which is provided with an air bearing surface for generating a lift force (levitation force) by the air flow on the surface facing the magnetic recording medium so as to levitate using the air flow. The magnetic head element is arranged so as to face a magnetic gap on the surface facing the recording medium.

Further, a magnetic disk drive device such as a hard disk drive device equipped with the floating magnetic head device for allowing the magnetic head element to access an arbitrary recording track of a magnetic recording medium (hereinafter abbreviated as drive device). 18) is constructed by attaching the slider 21 to a rotary actuator 26 via a suspension 25 as shown in FIG. As a result, when the magnetic recording medium 27 is stopped and started, the slider 21 comes into contact with the surface of the magnetic recording medium 27 by the elastic force of the suspension 25, but when the magnetic recording medium 27 rotates at a high speed, The slider 21 floats at a position where the lift force generated by the above-described air flow and the elastic force of the suspension 25 are in equilibrium, and the rotation axis O of the rotary actuator 26 described above serves as a fulcrum, and the magnetic recording medium 27 is radiated in the radial direction. It is operated while drawing an arcuate locus, and thereby recording / reproducing of an information signal with respect to an arbitrary recording track of the magnetic head element 22 is performed.

[0004]

However, when the slider 21 is operated in an arc shape on the magnetic recording medium 27 as described above, the slider 21 moves in the traveling direction of the recording track, that is, the air as shown in FIG. The levitation operation is performed with an angle θ (hereinafter, referred to as a skew angle θ) with respect to the traveling direction of the flow. That is, although not shown, the magnetic recording medium 27 in which the skew angle θ at which the longitudinal direction of the slider 21 and the advancing direction of the air flow substantially coincide is zero.
The slider 21 flies with a negative skew angle θ with respect to the air traveling direction on the inner peripheral side from the middle in the radial direction, and the slider 21 moves on the outer peripheral side from the position where the skew angle θ is zero. Ascend with a positive skew angle θ with respect to the traveling direction. As a result, as shown in FIG.
The flying height of the signal recording area 27a greatly changes from the innermost circumference to the outermost circumference.

That is, the slider 21 has a skew angle θ.
When the magnetic recording medium 27 is located on the inner side of the signal recording area 27a by swinging negatively, the peripheral speed of the magnetic recording medium 27 is not so high, and the slider 21 is tilted by the negative skew angle θ with respect to the air flow entering direction. Therefore, only a low flying height can be obtained.
Further, when the slider 21 is positioned at the skew angle θ of zero by swinging the skew angle θ from the inner peripheral side of the signal recording area 27a described above, the airflow approaching direction and the longitudinal direction of the slider 21 are substantially coincident with each other. Therefore, the slider 21 obtains the maximum flying height. Further, when the slider 21 is positioned on the outer peripheral side of the signal recording area 27a by swinging the skew angle θ positively,
Although the peripheral speed of the magnetic recording medium 27 is increased, the slider 21 is inclined by the skew angle θ with respect to the air flow entering direction, so that only a low flying height can be obtained. In particular, in the conventional taper-flat slider, if the skew angle θ range exceeds 15 degrees, the flying height of the slider on the inner and outer peripheral sides of the signal recording area is greatly reduced.

As described above, when the flying height of the slider 21 greatly changes from the innermost circumference to the outermost circumference of the signal recording area 27a, the output characteristics vary when recording / reproducing the information signal, and high density recording is achieved. It is disadvantageous in trying. In particular, in the above-mentioned drive devices and the like, in order to increase the recording density, the so-called zone bit recording method in which the frequency is increased from the inner circumference to the outer circumference of the magnetic recording medium 27 for recording is increasing. In this zone bit recording method, since the signal recording area 27a is divided into several zones and information signals are recorded at the same recording density, the flying height of the slider 21 is constant over the entire signal recording area 27a. Is required. However, as described above, if the flying height of the slider 21 changes greatly from the inner circumference to the outer circumference of the signal recording area 27a, zone bit recording cannot be made effective.

Further, in the above-mentioned drive device,
There is a demand for downsizing / measuring of the drive device itself.
Arms have been shortened / miniaturized. However, if the actuator arm is shortened / miniaturized,
The skew angle θ range of the slider 21 is further expanded, and the flying height of the slider 21 is further changed from the inner circumference to the outer circumference of the signal recording area 27a.

Therefore, the present invention has been proposed to solve the above-mentioned problems of the prior art, in which the flying height of the slider is constant over the entire signal recording area of the magnetic recording medium. It is an object of the present invention to provide a flying type magnetic head device that can be used.

[0009]

In order to achieve the above-mentioned object, one flying magnetic head device according to the present invention is a flying magnetic head device having a slider and a magnetic head element. The slider is characterized in that a triangular step portion having a height of 0.5 to 5 μm is formed on the air inflow end side of the surface of the slider facing the magnetic recording medium.

In the second flying type magnetic head device according to the present invention, a triangular recess having a depth of 0.5 to 5 μm is formed on the air outflow end side of the surface of the slider facing the magnetic recording medium. It is a feature.

[0011]

According to one flying type magnetic head device of the present invention, a triangular step portion having a height of 0.5 to 5 μm is formed on the air inflow end side of the surface of the slider facing the magnetic recording medium. Despite the skew angle θ and the change in the peripheral speed of the magnetic recording medium, the slider scans the signal recording area with a constant flying height with respect to the magnetic recording medium, so-called constant flying height (hereinafter, (Abbreviated as CFH).

Further, according to the second flying type magnetic head device of the present invention, a triangular recess having a depth of 0.5 to 5 μm is formed on the air outflow end side of the surface of the slider facing the magnetic recording medium. Therefore, regardless of changes in the skew angle θ and the peripheral speed of the magnetic recording medium, good CFH characteristics for recording / reproducing information signals can be obtained. Further, an appropriate pitch characteristic with respect to the traveling direction is obtained, which reduces the spacing loss of the magnetic head element, improves the contact start / stop durability of the slider, and tracks the recording track of the magnetic recording medium of the slider. Can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. The flying magnetic head device according to the present invention comprises a slider 1 and a magnetic head element 2.

As shown in FIG. 1, the slider 1 is made of, for example, a non-magnetic material such as ceramics, and has a flat rectangular shape. The surface 1a of the slider 1 facing the magnetic recording medium such as a hard disk extends in the longitudinal direction, that is, from the air inflow end 1b to the air outflow end 1c, which is the air introduction direction shown by the arrow X in FIG. A step portion 3 is formed in a substantially triangular shape in the center of the facing surface 1a so as to have a planar triangular shape. That is, a linear step surface 4 having a height of 0.5 to 5 μm from the substantially central position of the air inflow end 1b to both right and left ends of the air outflow end 1c.
a, 5a are formed, and inside the stepped surfaces 4a, 5a are smooth surfaces, so-called air bearing surfaces (hereinafter referred to as A
Abbreviated as BS. ) 3a, the step portion 3 is formed.

The step portion 3 receives the airflow generated on the surface of the magnetic recording medium by the ABS 3a described above, and the ABS 3a.
By increasing the rigidity of the air layer between the magnetic recording medium 3a and the magnetic recording medium, the slider 1 is floated above the magnetic recording medium with a minute gap. By compressing or expanding at 4a and 5a, a positive pressure (a force trying to separate from the magnetic recording medium) or a negative pressure (a force trying to approach the magnetic recording medium) is induced to cause the slider. 1 is floated above the magnetic recording medium with a constant gap.

Further, on both sides of the stepped portion 3 described above, recesses 4 and 5 are formed in a plane inverted triangle shape from the air inflow end 1b of the facing surface 1a to the air outflow end 1c. That is, the recesses 4 and 5 are formed by forming substantially flat surfaces from the step surfaces 4a and 5a to the outer wall surface of the facing surface 1a, that is, from the air inflow end 1b and the right left side surface, The above-mentioned air flow smoothly flows in and out.

Further, the rear end 1 of the slider 1 in the traveling direction is
The magnetic head element 2 is formed in c. The magnetic head element 2 is arranged so that its magnetic gap 2a faces the above-mentioned air bearing surface 3a, and when the slider 1 floats, the magnetic gap 2a is against the recording track of the magnetic recording medium. Almost orthogonal. The magnetic head element 2 may be a bulk head formed by butting a pair of magnetic cores, an MIG head, or the like. In this embodiment, the magnetic head element 2 has low inductance and high magnetic permeability even in a high frequency band.
A thin film magnetic head with a high saturation magnetic flux density was used.
As a result, the floating magnetic head device of this embodiment shown in FIG. 1 is completed.

Such a floating magnetic head device is a magnetic disk drive device (hereinafter abbreviated as drive device).
When the apparatus is mounted on a magnetic recording medium and the apparatus records / reproduces an information signal on / from the magnetic recording medium, the slider should be operated while holding the signal recording area of the magnetic recording medium with a constant minute gap (flying height). And a so-called constant flying height (hereinafter abbreviated as CFH) characteristic can be obtained.

That is, as shown in FIG. 2, when the slider 1 is positioned on the inner peripheral side of the signal recording area 10a of the magnetic recording medium 10 with a negative skew angle θ, the magnetic recording medium 10 shown by an arrow B in FIG. An airflow on the surface (hereinafter abbreviated as airflow B) enters the center line A of the slider 1 at an angle θ (that is, a skew angle θ). When the negative skew angle θ is small, the air flow B on each step surface 4a, 5a
By receiving the compression force, a positive pressure is generated, and the velocity of the air flow B, that is, the peripheral velocity of the magnetic recording medium 10 (hereinafter referred to as the peripheral velocity) is at the skew angle θ zero degree position P ₀ . It does not change much compared to the peripheral speed, and as a result, the flying height of the slider 1 when the negative skew angle θ is small is not so different from the flying height at the skew angle θ zero degree position P ₀ .

Further, as the slider 1 is operated toward the inner peripheral side of the signal recording area 10a by swinging the skew angle θ negatively, the angle α ₁ formed by the advancing direction of the air flow B and the step surface 5a gradually increases. The positive pressure generation efficiency increases. As a result, a high flying height can be obtained regardless of the negative skew angle θ being large and the peripheral speed being low, that is, the flying height of the slider 1 is not so different from that at the skew angle θ zero degree position P ₀ .

When the slider 1 further swings the skew angle θ negatively and reaches the innermost circumference P ₁ of the signal recording area 10a, the airflow B is received only by the substantially stepped surface 5a, and thus the airflow B Is compressed at the step surface 5a located on the windward side to generate a positive pressure, and the air flow B is the ABS of the step portion 3.
After passing through 3a, the step surface 4a located on the leeward side is expanded and a negative pressure is generated. However, even when the slider 1 reaches the innermost circumference P ₁ of the signal recording area 10a, the advancing direction of the air flow B and the step surface 4a are substantially parallel to each other, and the negative pressure generation efficiency is close to zero. Therefore, the positive pressure generation efficiency by the step surface 5a is high, that is, since the slider 1 is dominated by the positive pressure, the negative skew angle θ is still large and the peripheral speed is reduced, but the substantial skew is generated. The flying height at the angle θ zero degree position P ₀ is obtained.

Therefore, as the slider 1 reaches the innermost circumference P ₁ of the signal recording area 10a, the approach direction of the air flow B and the step surface 5a are substantially orthogonal to each other, so that a high positive pressure generation efficiency is obtained. The slider 1 obtains a high flying position regardless of the skew angle θ and the peripheral speed.

Further, as shown in FIG. 2, when the slider 1 is positioned on the outer peripheral side of the signal recording area 10a of the magnetic recording medium 10 with the skew angle θ positively moved, the magnetic recording medium 10 shown by an arrow C in FIG. An airflow on the surface (hereinafter abbreviated as airflow C) enters the slider 1 at an angle θ with respect to the centerline A. As described above, when the positive skew angle θ is small, the positive skew angle θ itself is small and the peripheral speed is not so different from the peripheral speed at the skew angle θ zero degree position P _0. The flying height of is the same as the flying height at the skew angle θ zero degree position P ₀ .

However, in general, the zero skew angle θ position of the slider 1 is closer to the inner circumference, and as a result, the positive skew angle θ range is larger than the negative skew angle θ range. For this reason, as the slider 1 is moved toward the outer peripheral side of the signal recording area 10a while further swinging the positive skew angle θ,
The angle β gradually formed by the direction in which the air flow C enters and the step surface 4a
₂ becomes large, and especially after the inflow direction of the air flow C and the step surface 4a are substantially parallel to each other, the negative pressure generation efficiency by the step surface 5a located on the leeward side becomes high. That is, the air flow C first generates a positive pressure by the step surface 4a on the windward side,
After passing through the ABS 3a, negative pressure is generated from the step surface 5a on the leeward side. At this time, since the range of the positive skew angle θ is large, the angle α ₂ formed by the inflow direction of the air flow C and the step surface 5a.
Is large and the negative pressure generation efficiency is large. Therefore, the flying height of the slider 1 is suppressed regardless of the increase in the peripheral speed.

Therefore, as the slider 1 reaches the outermost periphery P ₂ of the signal recording area 10a, the angle α ₂ formed by the advancing direction of the air flow C and the step surface 5a on the leeward side increases, and a high negative pressure is generated. Since the efficiency is obtained, the flying height of the slider 1 is the same as the skew angle θ zero degree position P ₀ .

From the above results, when the slider 1 is operated on the signal recording area 10a of the magnetic recording medium 10 by swinging the skew angle θ from negative to positive (and vice versa), The air flow generated on the magnetic recording medium 10 generates positive pressure / negative pressure by the step surfaces 4a and 5a of the step portion 3,
In addition, the positive pressure / negative pressure generation efficiency is changed depending on the angle formed by the air flow and the differential surfaces 4a, 5a, so that the magnetic recording medium 10 can be operated with a certain minute gap (flying height). , CFH characteristics are obtained. The air flow B in FIG. 3 shows the case where the slider 1 is located at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 3 shows that the slider 1 is in the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Although the floating magnetic head device according to the present embodiment has been described above, various modifications can be made without departing from the spirit of the present invention, and the step portion 3 may be formed as follows. Good.

For example, the slider 1 may be formed as shown in FIG. That is, the slider 1 is made of, for example, a non-magnetic material such as ceramics, and has a planar rectangular shape. On the surface 1a of the slider 1 facing the magnetic recording medium, a step portion 3 having a plane triangular shape is formed on the right and left sides of the facing surface 1a in the longitudinal direction, that is, from the air inflow end 1b to the air outflow end 1c. 6 is formed to project. That is, the height from the right and left ends of the air inflow end 1b to the approximate center position of the air outflow end 1c is 0.5.
Linear step surfaces 3b and 6b having a width of up to 5 μm are formed, and the opposed surface 1 is formed from these step surfaces 3b and 6b.
The steps 3 and 6 are formed by making ABSs 3a and 6a up to the outer wall surface of a, that is, the air outflow end 1c and the right and left side surfaces. Further, a concave portion 4 having a plane inverted triangular shape is formed in a substantially central portion of the facing surface 1a so as to be sandwiched between the step portions 3 and 6. That is, the recess 4 is formed such that the insides of the step surfaces 3b and 6b are formed into a substantially flat surface, and an opening for introducing an air flow is expanded over the entire width in the width direction of the air inflow end 1b of the facing surface 1a. Has been done.

In this case, as shown in FIG. 2, when the slider 1 is positioned on the inner peripheral side of the signal recording area 10a of the magnetic recording medium 10 with a negative skew angle θ, the negative skew angle θ
Is small, the step surfaces 3b and 6b as shown in FIG.
At the skew angle θ zero degree position P ₀ , the positive skew is generated by receiving the air flow B, the negative skew angle θ is small, and the peripheral speed is not so different from the peripheral speed of the skew angle θ zero degree position P _{0. It} is not so different from the flying height of ₀ . Furthermore, in FIG.
When the slider 1 reaches the innermost circumference P ₁ of the signal recording area 10a by swinging the skew angle θ negatively as shown in FIG. 5, that is, the approach direction of the air flow B and the step surface 6b are substantially parallel to each other, and Since the direction in which the air flow B enters and the step surface 3b are substantially orthogonal to each other, a high positive pressure generation efficiency is obtained, and the slider 1 has a high flying position regardless of a large negative skew angle θ and a decrease in peripheral speed. Can be obtained.

As shown in FIG. 2, when the slider 1 is positioned on the outer peripheral side of the signal recording area 10a of the magnetic recording medium 10 with the skew angle θ positively swung, the positive skew angle θ is small as described above. In the same manner as described above, each step surface 3b, 6
b positive pressure is generated by receiving the air flow C in, for positive skew angle θ is small and the circumferential speed is not different from the circumferential speed of the skew angle θ zero degree position P _0, the flying height of the skew angle θ zero degree position P ₀ does not change. When the skew angle θ is further swung to a positive value, the positive skew angle θ range is larger than the negative skew angle θ range, as described in detail in the previous embodiment. Therefore, the advancing direction of the air flow C and the step surface 4a are increased. After and are substantially parallel to each other, the air flow C passes through the ABS 3a to generate a negative pressure on the step surface 3a and a positive pressure on the step surface 6a. The negative pressure generated by the step surface 3a causes the slider 1 to move to the signal recording area 10
It becomes higher as it reaches the outermost circumference P ₂ of a, that is, the slider 1 is dominated by the negative pressure, and the flying amount at the skew angle θ zero degree position P ₀ regardless of whether the positive skew angle θ is large or the peripheral speed is increased. And obtain a flying height equivalent to.

Therefore, the slider is operated with a constant flying height with respect to the magnetic recording medium 10 regardless of the skew angle θ and the peripheral speed of the magnetic recording medium 10, and the CFH characteristic is obtained. The description of the magnetic head element 2 is omitted and only the illustrations in FIGS. 4 and 5 are given. The air flow B in FIG. 5 shows the case where the slider 1 is positioned at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 5 shows that the slider 1 is in the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Further, for example, as shown in FIG. 6, the slider 1
May be formed. That is, the slider 1 is made of, for example, a non-magnetic material such as ceramics, and has a planar rectangular shape. On the surface 1a of the slider 1 facing the magnetic recording medium, a stepped portion having a substantially triangular shape in a plane is formed in a substantially central portion of the facing surface 1a in the longitudinal direction, that is, from the air inflow end 1b to the air outflow end 1c. 3 is formed to project. That is, a height of 0.5 to 5 μm is provided so as to extend substantially along the longitudinal direction of the slider 1 from the midway portion of the air inflow end 1b (hereinafter referred to as point P ₁ ) to the midway portion of the air outflow end 1c. A straight step surface 4a is formed, and the height is 0.5 to 5 from the point P ₁ to the left end of the air outflow end 1c.
A linear step surface 5a having a thickness of μm is formed, and the step portion 3 is formed by making the inside of these step surfaces 4a, 5a ABS 3a. That is, the stepped portion 3 is formed asymmetrically with respect to the center line A of the slider 1 shown by the dashed line in FIG. Further, on both sides of the stepped portion 3 described above, a concave portion 4 having a rectangular shape in a plane and a concave portion 5 having an inverted triangular shape in a plane are also provided from the air inflow end 1b to the air outflow end 1c of the magnetic recording medium facing surface 1a of the slider 1. Are formed. That is, the recessed portions 4 and 5 are formed by forming the stepped surfaces 4a and 5a to the outer wall surface of the facing surface 1a in a substantially flat shape.

In this case, since the lengths of the step surfaces 4a and 5a are different from each other, when the slider 1 is positioned on the inner peripheral side of the signal recording area 10a by swinging the skew angle θ negatively as shown in FIG. As shown in FIG. 7, the air flow B generates a positive pressure on the step surface 5a over the entire range of the negative skew angle θ,
As the slider 1 reaches the innermost circumference of the signal recording area 10a, the approach direction of the air flow B and the step surface 5a are orthogonal to each other, so that the slider 1 has a large negative skew angle θ and a lower peripheral speed. It is possible to obtain a high flying position regardless of whether or not When the slider 1 is located on the outer peripheral side of the signal recording area 10a of the magnetic recording medium 10 as shown in FIG. 2, the slider 1 swings the skew angle .theta. The step surfaces 4a, 5 against which the air flow C collides until the inflow direction of the flow C and the step surface 5a are substantially parallel to each other.
Since the relative area of a is small, a high positive pressure generation efficiency cannot be obtained, and after the inflow direction of the air flow C and the step surface 5a are substantially parallel to each other, the slider 1 becomes the signal recording area 10a. Until reaching the outermost circumference, a negative pressure is generated on the step surface 5a. As a result, the slider 1 obtains a low flying position regardless of the large positive skew angle θ and the increase in peripheral speed.

Therefore, the slider can obtain the CFH characteristic regardless of the skew angle θ and the peripheral speed of the magnetic recording medium 10. Further, in the present embodiment, the CFH characteristic of the slider can be obtained even when the actuator arm of the rotary actuator of the magnetic recording / reproducing apparatus is further shortened / miniaturized and the positive skew angle range is widened. Also,
Such a floating magnetic head device can be used as a planar head. The description of the magnetic head element 2 is omitted and only the illustrations in FIGS. 6 and 7 are given.
The air flow B in FIG. 7 shows the case where the slider 1 is positioned at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 7 shows that the slider 1 has the signal recording area 1
It is shown when it is located at the outermost periphery P _{2 of} 0a.

Further, as shown in FIG. 8, for example, the slider 1
May be formed. That is, the slider 1 is made of, for example, a non-magnetic material such as ceramics, and has a planar rectangular shape. On the surface 1a of the slider 1 facing the magnetic recording medium, a stepped portion having a substantially triangular shape in a plane is formed in a substantially central portion of the facing surface 1a in the longitudinal direction, that is, from the air inflow end 1b to the air outflow end 1c. 3 is formed to project. That is, from the midway portion of the air inflow end 1b (hereinafter referred to as point P1) to the air outflow end 1c (hereinafter, referred to as point P1).
The point is P2. ) With a height of 0.5 to 5 μm along the longitudinal direction of the slider 1 and a linear step surface 4
a is formed, and a straight line having a height of 0.5 to 5 μm from the midway portion of the air inflow end 1b, that is, the midway portion of the left side surface of the facing surface 1a (hereinafter referred to as point P3). -Shaped step surface 5a is formed, and the air outflow end 1c is formed from the middle of the left side surface of the facing surface 1a, that is, the point P2.
0.5 to 5 heights in the middle part, that is, point P3
A linear step surface 7a having a thickness of μm is formed, and the step portion 3 is formed by making the inside of these step surfaces 4a, 5a, 7a ABS3a. That is, the step portion 3 is formed asymmetrically with respect to the center line A of the slider 1 shown by the dashed line in FIG. Then, the step portion 3 described above
On the outer sides of the above, there are formed recesses 4 each having a substantially rectangular shape in a plane and recesses 5 and 7 each having a substantially triangular shape in a plane. That is,
From the step surfaces 4a, 5a and 7a, the facing surface 1 is formed.
By forming a substantially flat surface up to the outer wall surface of a,
Recesses 4, 5, and 7 are formed.

In this case, as shown in FIG. 2, when the slider 1 is positioned on the inner peripheral side of the signal recording area 10a with a negative skew angle θ, as shown in FIG. 9, the slider 1 records the signal. As it reaches the innermost circumference P ₁ of the region 10a, the approach direction of the air flow B and the step surface 5b are substantially orthogonal to each other, so that the slider 1 is high regardless of a large negative skew angle θ and a decrease in peripheral speed. The floating position can be obtained. Further, as shown in FIG. 2, the slider 1 is a magnetic recording medium 1.
When it is located on the outer peripheral side of the 0 signal recording area 10a,
As shown in FIG. 9, the slider 1 has a signal recording area 1
As it reaches the innermost circumference P ₂ of 0a, the approach direction of the air flow C and the step surface 7a are orthogonal to each other, the negative pressure generation efficiency becomes high, and the slider 1 has a large positive skew angle θ and a peripheral speed. Gets a low ascent position regardless of the rise.

Therefore, even if the positive skew angle range becomes large as described above, the CF of the slider becomes large.
H characteristics can be obtained. It can also be used with a planar head as described above. The description of the magnetic head element 2 is omitted and only the illustrations in FIGS. 8 and 9 are given. The air flow B shown in FIG. 9 indicates when the slider 1 is positioned at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C shown in FIG. 9 shows that the slider 1 covers the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Further, the slider 1 may be formed as shown in FIG. 10, for example. That is, the slider 1 is
For example, it is made of a non-magnetic material such as ceramics and has a rectangular shape in a plane. On the surface 1a of the slider 1 facing the magnetic recording medium, recesses 4 and 5 having a plane inverted triangular shape in the longitudinal direction, that is, from the air inflow end 1b to a midway portion in the longitudinal direction have a depth of 0.5 from an ABS 3a described later. ~ 5μ
It is formed with m. The recesses 4 and 5 are formed by expanding the openings for introducing the air flow, respectively, over the entire width of the air inflow end 1b of the facing surface 1a.

On the air outflow end 1c side of the facing surface 1a, from the midway portion of the facing surface 1a in the longitudinal direction to the vicinity of the air outflow end 1c, a concave portion 6 having a substantially rhombic shape in a plane is formed substantially in the center of the facing surface 1a.
Is formed in an elongated shape, and concave portions 7 and 8 having a flat inverted triangular shape are formed on both sides of the concave portion 6 from the midway portion of the concave portion 6 in the longitudinal direction to the vicinity of the air outflow end 1c. These recesses 6, 7 and 8 have a depth of 0.5 from the ABS 3a described later.
When the air flow is introduced, the slider 1 is levitated above the magnetic recording medium with a constant gap, and the air outflow end 1c side of the slider 1 is located on the magnetic recording medium. The negative pressure is generated so that the slider 1 keeps an inclined posture that is rearward and downward with respect to the traveling direction.

The stepped portion 3 is formed by making the facing surface 1a other than the concave portions 4, 5, 6, 7, 8 into the ABS 3a. Of course, the step portion 3 serves to increase the rigidity of the air layer between the ABS 3a and the magnetic recording medium when the air flow is introduced so that the slider 1 is floated above the magnetic recording medium with a certain gap.

In this case, the air outflow end 1 of the facing surface 1a
When the slider 1 is positioned on the inner peripheral side of the signal recording area 10a with the skew angle θ being negatively moved as shown in FIG. 1 shows the signal recording area 1 by swinging the skew angle θ positively.
Even when it is located on the outer peripheral side of 0a, as shown in FIG. 11, the recess 6 is always provided over the entire skew angle θ.
Negative pressure occurs at 7 and 8. As a result, the flying height of the slider 1 on the air outflow end 1c side is reduced, the air layer between the ABS 3a and the magnetic recording medium 10 is made more rigid, and the surface wobbling of the magnetic recording medium 10 at the time of starting the magnetic recording / reproducing apparatus is started. Also, good followability with respect to the recording track is obtained even with respect to vibration of the magnetic recording medium 10 due to an external impact on the magnetic recording / reproducing apparatus. Further, when the slider 1 receives an airflow, it floats in a downwardly inclined posture with respect to the traveling direction, so that the takeoff and landing speed at the time of starting / stopping the magnetic recording medium 10 can be shortened, and the slider 1 and the magnetic recording medium 10 can be shortened. The sliding contact time is shortened and CSS (Constant Start Stop) durability is improved. Regarding the magnetic head element 2,
The description thereof is omitted, and only the drawings shown in FIGS. 10 and 11 are shown. The air flow B in FIG. 11 shows the case where the slider 1 is positioned at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 11 shows that the slider 1 is in the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Further, the slider 1 may be formed as shown in FIG. 12, for example. That is, the slider 1 is
For example, it is made of a non-magnetic material such as ceramics and has a rectangular shape in a plane. On the surface 1a of the slider 1 facing the magnetic recording medium, the air inflow end 1 extends in the longitudinal direction, that is, from the air inflow end 1b to a midway portion in the longitudinal direction.
Recesses 4 and 5 each having an inverted triangular shape in plan are formed on both sides of b. In addition, an opening is provided in the air outflow end 1c at a substantially central portion of the air outflow end 1c of the facing surface 1a, and a recess 6 having a rectangular shape in a plane is formed. The recess 6 has an ABS 3 described later.
It is formed to have a depth of 0.5 to 5 μm from a. When the air flow is introduced, the slider 1 is levitated above the magnetic recording medium with a constant gap, and the slider 1 moves in the traveling direction. The negative pressure is generated so as to maintain the inclined posture of falling backward. And these recesses 4, 5, 6
The stepped portion 3 is formed by making the opposite surface 1a except the ABS 3a. Of course, the step portion 3 has a function of introducing an air flow to generate a positive pressure or a negative pressure, and making the slider 1 float above the magnetic recording medium with a certain gap.

In this case, the air outflow end 1 of the facing surface 1a
When the slider 1 is positioned on the inner peripheral side / outer peripheral side of the signal recording area 10a with the skew angle .theta.
As shown in FIG. 3, a negative pressure is constantly generated in the concave portion 6 over the entire skew angle θ range, whereby the above-described good recording track followability is obtained and the CSS durability is improved. The description of the magnetic head element 2 is omitted, and only the illustration in FIGS. 12 and 13 is given. The air flow B in FIG. 13 shows when the slider 1 is located at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 13 shows that the slider 1 is in the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Further, the slider 1 may be formed as shown in FIG. 14, for example. That is, the slider 1 is
For example, it is made of a non-magnetic material such as ceramics and has a rectangular shape in a plane. On the surface 1a of the slider 1 facing the magnetic recording medium, recesses 4 and 5 are formed in a plane inverted triangle shape in the longitudinal direction, that is, from the air inflow end 1b to a midway portion in the longitudinal direction. The concave portions 4 and 5 are step surfaces 4
a, 4b, 5a, 5b, and the facing surface 1a
Each of the air inflow ends 1b is formed so as to expand an opening for introducing an air flow. Further, the step surfaces 4a, 5a and the step surfaces 4b, 5b are formed with different lengths, and as shown in FIG. 15, they are formed in the shape of an inverted right triangle with one apex spaced apart from the air inflow end 1b facing to the right. There is.

On the air outflow end 1c side of the facing surface 1a, flat triangular recesses 6 and 7 are formed from the midway portion of the facing surface 1a in the longitudinal direction to the vicinity of the air outflow end 1c.
As shown in FIG. 5, one apex separated from the air outflow end 1c is formed to the left. These recesses 6 and 7 are formed so as to have a depth of 0.5 to 5 μm from the ABS 3a, which will be described later. Of course, when the air flow is introduced, the slider 1 is floated above the magnetic recording medium with a certain gap. Further, the slider 1 causes a negative pressure so as to maintain the inclined posture in which the slider 1 is lowered rearward with respect to the traveling direction. The facing surface 1a excluding the concave portions 4, 5, 6, 7 is the ABS 3a.
As a result, the step portion 3 is formed and has a laterally asymmetrical shape with respect to the center line A of the slider 1 shown by the dashed line in FIG. Of course, the step portion 3 has a function of introducing an air flow to generate a positive pressure or a negative pressure, and making the slider 1 float above the magnetic recording medium with a certain gap.

Also in this case, similarly to the above, since the recesses 6 and 7 are formed on the air outflow end 1c side of the facing surface 1a, the slider 1 makes the skew angle θ negative / positive as shown in FIG. When the signal recording area 10a is swung and positioned on the inner / outer side, the negative pressure is always generated in the recesses 6 and 7 over the entire skew angle θ as shown in FIG. Good recording track followability is obtained, and CSS durability is improved. The magnetic head element 2
With respect to the above, description is omitted and only the illustration in FIG. 14 and FIG. 15 is shown. The air flow B in FIG. 15 shows when the slider 1 is located at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG. 15 shows that the slider 1 is in the signal recording area 10a. It shows the case where it is located at the outermost periphery P ₂ .

Further, the slider 1 may be formed as shown in FIG. 16, for example. That is, the slider 1 is
For example, it is made of a non-magnetic material such as ceramics and has a rectangular shape in a plane. On the surface 1a of the slider 1 facing the magnetic recording medium, a recess 4 is formed as a groove having a rectangular cross section at the left end of the surface 1a extending in the longitudinal direction, that is, from the air inflow end 1b to the air outflow end 1c. ing.
Further, recesses 5 and 6 having a flat inverted triangular shape are formed from the air inflow end 1b of the facing surface 1a to a midway portion in the longitudinal direction thereof. The recesses 5 and 6 are formed such that the recesses 4 and 5 expand the openings for introducing the air flow over the entire width of the air inflow end 1b except the width of the recess 4.
Further, on the rear end 1c side of the facing surface 1a in the traveling direction, plane-shaped triangular recesses 7 and 8 are formed from the longitudinal midway portion of the facing surface 1a to the vicinity of the air outflow end 1c. Therefore, the step portion 3 is formed by making the facing surface 1a excluding the concave portions 4, 5, 6, 7, and 8 an ABS 3a, and a center line A of the slider 1 shown by a dashed line in FIG.
The shape is asymmetrical with respect to.

As described above, since the recesses 4, 7 and 8 are formed on the air outflow end 1c side of the facing surface 1a, the slider 1 has a skew angle θ of negative / positive as shown in FIG. When the signal recording area 10a is positioned on the inner side / outer side of the signal recording area 10a, a negative pressure is always generated in the concave portions 4, 7, and 8 over the entire skew angle θ as shown in FIG. As a result, the good recording track followability described above is obtained, and the CSS durability is improved. The description of the magnetic head element 2 is omitted, and only the illustration in FIGS. 16 and 17 is given. The air flow B in FIG. 17 shows the case where the slider 1 is located at the innermost circumference P ₁ of the signal recording area 10a, and the air flow C in FIG.
Is the outermost circumference P ₂ of the signal recording area 10a.
It shows when it is located at.

[0049]

As is apparent from the above description, according to one flying magnetic head device of the present invention, the height of the slider is 0.5 to 5 on the air inflow end side of the surface facing the magnetic recording medium.
Since the triangular step portion of μm is formed, when the slider is operated on the signal recording area of the magnetic recording medium, the signal recording area is irrespective of the change of the skew angle θ and the change of the peripheral speed of the magnetic recording medium. The slider flying height is equalized over the entire area,
A constant flying height characteristic is achieved.
As a result, it is applied to a magnetic recording / reproducing apparatus adopting the zone bit recording method, and a useful constant flying height effect can be obtained.

Further, according to the second flying type magnetic head device of the present invention, a triangular recess having a depth of 0.5 to 5 μm is formed on the air outflow end side of the surface of the slider facing the magnetic recording medium. Therefore, when the slider is operated on the signal recording area of the magnetic recording medium, the constant flying height characteristic of the slider is achieved regardless of the change of the skew angle θ and the change of the peripheral speed of the magnetic recording medium. When applied to a magnetic recording / reproducing apparatus adopting the zone bit recording method, a useful constant flying height effect can be obtained.

Further, when the magnetic recording medium is activated, the slider is scanned at a low flying position, so that the deterioration of the output characteristics such as spacing loss of the magnetic head element is suppressed, and the space between the slider and the magnetic recording medium is suppressed. The air layer has high rigidity, and as a result, good recording track followability can be obtained even when surface wobbling at the time of startup of the magnetic recording medium or vibration of the magnetic recording medium due to external impact occurs.

Further, the take-off and landing speed of the slider when starting / stopping the magnetic recording medium can be reduced, and the sliding time of the slider on the magnetic recording medium can be shortened, so that the CSS (contact start / stop) durability characteristics are improved. ..

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of a floating magnetic head device according to the present invention.

FIG. 2 is a schematic view showing a state in which a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 3 is a plan view schematically showing a traveling direction of an airflow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 4 is a perspective view showing a schematic configuration of another embodiment of the floating magnetic head device according to the present invention.

FIG. 5 is a plan view schematically showing a traveling direction of an air flow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 6 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 7 is a plan view schematically showing a traveling direction of an air flow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 8 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 9 is a plan view schematically showing a traveling direction of an airflow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 10 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 11 is a plan view schematically showing a traveling direction of an air flow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 12 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 13 is a plan view schematically showing a traveling direction of an air flow when a hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 14 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 15 is a plan view schematically showing the traveling direction of the air flow when the hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 16 is a perspective view showing a schematic configuration of still another embodiment of the floating magnetic head device according to the present invention.

FIG. 17 is a plan view schematically showing the traveling direction of the air flow when the hard disk is accessed by the floating magnetic head device according to the present invention.

FIG. 18 is a plan view schematically showing a conventional hard disk drive device.

FIG. 19 is a schematic diagram showing a state where a hard disk is accessed by a conventional floating magnetic head device.

FIG. 20 is a characteristic diagram showing a flying height of a slider when a hard disk is accessed by a conventional floating magnetic head device.

[Explanation of symbols]

 1 ・ ・ ・ Slider 2 ・ ・ ・ Magnetic head element 3 ・ ・ ・ Step portion 4,5 5 ・ ・ ・ Recess

Claims (2)

[Claims] 1. A flying magnetic head device comprising a slider and a magnetic head element, wherein a triangular step portion having a height of 0.5 to 5 μm is provided on an air inflow end side of a surface of the slider facing the magnetic recording medium. A flying-type magnetic head device, wherein: 2. A flying type magnetic head device, wherein a triangular recess having a depth of 0.5 to 5 μm is formed on the air outflow end side of the surface of the slider facing the magnetic recording medium.