JPH08147917A - Magnetic storage device and its slider - Google Patents

Abstract

PURPOSE: To substantially make the mim. floating gap of a slider conform to a magnetic recording gap by satisfying an expression as shown in the figure, where a distance from an air outflow end of the slider to an air outflow end side of a tapered surface is denoted as 1x, and a distance from the air outflow end to the magnetic recording/reproducing gap as 1g, etc. CONSTITUTION: The distance from the air outflow end of the slider to the air outflow end side of the tapered surface is denoted as 1x, while the distance from the air outflow end to the magnetic recording/reproducing gap as 1g, a floating height at the air outflow end as hr, a floating height on the air outflow end side of the tapered surface as hin and a crown height δx. The slider is provided to satisfy the conditions of the expression including the above factors. Thus, the magnetic recording gap and the min. floating height can substantially be made to conform to each other. Then, the capacity of the magnetic storage device can be increased while the reliability is maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic storage device and a slider thereof, and in particular, by substantially matching the minimum flying clearance of the slider with the magnetic recording clearance, a large capacity is realized while maintaining the flying reliability. Magnetic storage device and its slider.

[0002]

2. Description of the Related Art Recording magnetic information on a magnetic recording medium,
Further, in a magnetic storage device intended to reproduce magnetic information recorded on a magnetic recording medium, the magnetic recording gap which is the distance between the magnetic recording / reproducing gap of the magnetic converter and the magnetic recording medium is kept as narrow as possible. There is a need. Therefore, a slider provided with a magnetic converter is levitated to a minute gap on the magnetic recording medium by utilizing the air bearing effect.

In order to narrow the flying clearance between the magnetic recording medium and the slider, it is desirable that the magnetic recording medium be smooth. However, as the magnetic recording medium becomes smoother, the air bearing surface of the slider and the magnetic recording medium are more likely to adhere to each other while the magnetic storage device is stopped, and a large adhesive force is exerted between the slider and the magnetic recording medium when the magnetic storage device is activated. This may cause the device to fail to start or the support spring to break. Therefore, in Japanese Patent Publication No. 58-21329, a crown is provided in the longitudinal direction of the air bearing surface to prevent sticking between the slider and the magnetic recording medium, and a taper surface is provided on the air outlet end side to provide a minimum clearance for the air outlet end. I am trying to become. Further, in USP 4285019, a crown is formed in a longitudinal direction or a lateral direction of a slider to prevent adhesion, and a minimum floating clearance is not provided at a magnetic recording / reproducing gap position to prevent an adverse effect of dust on a magnetic converter. There is.

[0004]

In order to increase the capacity of the magnetic storage device, it is essential to narrow the flying clearance of the slider. In order to realize the narrowing of the floating clearance with high reliability, the moment force acting on the slider and the waviness of the magnetic recording medium during seek positioning, which is the movement from one track to another on the magnetic recording medium, are required. It is necessary to minimize the dynamic change in the floating clearance due to various disturbances such as the applied excitation force and environmental temperature changes. Also, it is necessary to minimize the static change in the floating clearance due to the machining error of the slider.

Although it is necessary to smooth the magnetic recording medium in order to reduce the change in the floating clearance caused by the undulation of the magnetic recording medium, the adhesive force between the slider and the magnetic recording medium becomes large, and the supporting spring and the magnetic recording are increased. There is a problem that the possibility of destroying the medium increases.

In Japanese Patent Publication No. 58-21329, a crown is formed in the longitudinal direction of the slider in order to reduce the adhesive force and the contact area between the slider and the magnetic recording medium is reduced to reduce the adhesive force. Furthermore, a taper surface is provided on the air inflow end of the slider so that the air outflow end has a minimum floating clearance. In order to increase the storage capacity of the magnetic storage device, it is better to make the magnetic recording gap, which is the distance between the magnetic recording / reproducing gap and the magnetic recording medium, as narrow as possible. On the contrary, the reliability of the magnetic storage device is improved. For this purpose, the minimum floating clearance between the slider and the magnetic recording medium should be as large as possible. In a conventional general slider, a magnetic transducer is provided near the air outflow end of the slider as disclosed in Japanese Patent Publication No. 58-21329, and magnetic recording / recording is performed.
The regeneration gap is formed not at the air outflow end but at a position slightly displaced from the air outflow end toward the air inflow end. Further, since the taper surface is formed on the air inflow end side, the slider has a large floating clearance on the air inflow end side, and is floated in such a posture as to have the minimum floating clearance at the air outflow end position. Under such a flying posture, the magnetic recording clearance at the magnetic recording / reproducing gap position is always larger than the minimum floating clearance at the air outflow end. As described above, the magnetic recording clearance should be as small as possible in order to increase the storage capacity of the magnetic storage device, and the minimum floating clearance should be as large as possible in order to maintain the floating reliability. As the slider flying clearance becomes narrower, the difference between the magnetic recording clearance and the minimum flying clearance becomes a problem in terms of storage capacity and flying reliability. The minimum floating clearance of the slider greatly changes depending on the flying posture of the slider, the height of the crown, etc., and as described in the above-mentioned known example, the taper surface does not necessarily mean that the air outflow end has the minimum floating clearance. Instead, in order to match the minimum flying clearance with the magnetic recording clearance, it is necessary to specify an appropriate flying posture and crown height. Further, when a thin film magnetic transducer is formed by utilizing a semiconductor process which has been widely used in recent years, a magnetic recording / reproducing gap can be formed with high accuracy at an arbitrary position on the slider air bearing surface, and the magnetic recording / reproducing gap can be formed near the air outflow end. There is no need to be obsessed with forming the recording / playback gap.

According to USP 4285019, a crown is provided in the longitudinal direction and the lateral direction of the slider so that the position of the magnetic transducer does not intentionally become the minimum floating clearance, so that dust existing in the magnetic storage device does not adversely affect the magnetic transducer. It has such a configuration. In this known example, since the minimum floating clearance is different from the magnetic recording clearance, it is difficult to increase the capacity of the magnetic storage device.

The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to make the minimum flying clearance of the slider substantially coincide with the magnetic recording clearance.
It is to increase the capacity of a magnetic storage device while maintaining its reliability.

[0009]

To achieve the above object, a feature of the present invention is that it has an air inflow end, an air outflow end, and an air bearing surface, and the air bearing surface is a tapered surface formed on the air inflow end side. And a magnetic transducer having a crown height δx formed in the longitudinal direction of the air bearing surface and having a magnetic recording / reproducing gap formed at an arbitrary position on the air bearing surface and flying over a magnetic recording medium. In the slider, the positive crown height δx, the flying clearance hf generated by the bearing effect between the air outflow end and the magnetic recording medium during recording / reproducing by the magnetic storage device, and the air outflow end of the taper surface. Side clearance between the magnetic recording medium and the magnetic recording medium, the distance lx between the air outflow end and the air outflow end side of the tapered surface, the air outflow end and the magnetic recording / reproducing gap. Between the distance lg and (hf-hin) lx / {6 (2lg-lx)} ≤ δx ≤ (hin + hf) / 4 + 1
The slider is such that the relational expression of / 2 · (hin · hf) ^1/2 is satisfied, and the magnetic storage device is provided with the slider.

[0010]

According to the above structure, the floating clearance at the magnetic recording / reproducing gap position of the slider becomes the minimum floating clearance, and the minimum floating clearance and the magnetic recording clearance can be substantially matched with each other, thus increasing the capacity of the magnetic storage device. Can be achieved while maintaining reliability.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described in detail with reference to FIG.

FIG. 1 is a side view of a slider according to a first embodiment of the present invention when the slider is flying. The slider 1 has an air inflow end 2, an air outflow end 3, and an air bearing surface 4, and the air bearing surface 4 has a taper surface 5 on the air inflow end side and a distance from the air outflow end side of the taper surface 5 to the air outflow end 4. Crown height δx over lx
The crown is formed. Distance l from the air outflow end 3
A thin film magnetic converter 6 formed by using a semiconductor process is provided at the position of g, and recording / recording of the thin film magnetic converter 6 is performed.
At the position of the reproducing gap 7, magnetic information is recorded on the magnetic recording medium 8 or the magnetic information recorded on the magnetic recording medium 8 is reproduced. The slider 1 receives the air flow generated by the rotation of the magnetic recording medium 8 on the tapered surface 5 and the air bearing surface 4, and floats above the magnetic recording medium 8 with an extremely small clearance due to the air bearing effect. In order to realize a large capacity of the magnetic storage device, it is necessary to make the magnetic recording gap, which is the distance between the magnetic recording / reproducing gap and the magnetic recording medium 8, as narrow as possible, and accordingly, the air bearing surface of the slider is arbitrarily set. It is necessary to narrow the minimum floating clearance that can be taken at the position of as much as possible. Currently, the minimum floating clearance is 100 nm or less. In order to reduce the minimum flying clearance while maintaining reliability without contacting the slider 1 with the magnetic recording medium 8, the smoothness of the magnetic recording medium 8 is improved and the followability of the slider 1 to the magnetic recording medium 8 is improved. Need to improve. However, if the smoothness of the magnetic recording medium 8 is improved, the slider 1 and the magnetic recording medium 8 adhere to each other while the magnetic storage device is stopped, and the device does not start when the device is started, or the slider 1 The support spring of may be damaged. Therefore,
Conventionally, a positive crown is formed in the longitudinal direction of the air bearing surface 4 for the purpose of preventing sticking, and a taper surface 5 is provided on the air inflow end side so that the air bearing end has a minimum floating clearance at the position of the air outflow end 3.
Are formed.

In recent years, a thin film magnetic converter formed by utilizing a semiconductor process has become the mainstream of the magnetic converter 6.
In this case, since the thin film element is formed as a multi-layered film on the ceramic substrate such as AlTiC which is the base material of the slider 1, the position of the air outflow end 3 and the magnetic recording / reproducing gap 7 as shown in FIG. It is difficult to match the positions perfectly.

FIG. 2 is a side view for explaining the flying state of the slider 1 when no crown is formed on the flying surface 4. Since the taper surface 5 is provided on the air inflow end side and the position of the air outflow end 3 and the position of the magnetic recording / reproducing gap 7 do not match, the floating clearance hf at the air outflow end 3 becomes the minimum floating clearance hmin, Magnetic recording clearance h with a floating clearance at the position of the magnetic recording / reproducing gap 7
g becomes larger than hf. When the flying clearance of the slider is large as in the past, the difference between hmin and hg was not so important, but if the flying height is further reduced in the future,
This difference becomes very important in terms of storage capacity loss and floating reliability. For example, lx = 1.1 mm, lg =
40 μm, hf = hmin = 35 nm, hin = 210
When the slider flies under the condition of nm, the difference Δh between the magnetic recording clearance hg and the minimum flying clearance hmin is about 6.
It becomes 4 nm, which is about 18% of the minimum floating clearance hmin.

FIG. 3 is a side view for explaining a flying state of the slider when a crown is formed on the air bearing surface 4 but the flying clearance on the air inflow end 2 side is larger than that in FIG.
Since the levitation clearance on the air inflow end 2 side is large, the difference between the minimum levitation clearance hmin and the magnetic recording clearance hg becomes large. For example, lx = 1.1
mm, lg = 40 μm, hf = hmin = 35 nm, h
When in = 300 nm and δx = 15 nm, the difference Δh between the magnetic recording clearance hg and the minimum flying clearance hmin is about 7.5.
nm, which is about 21% of the minimum floating clearance hmin.

FIG. 4 illustrates the flying state of the slider when the air bearing surface 4 has no crown and the magnetic recording / reproducing gap 7 is formed on the air inflow end side as compared with FIGS. 1, 2 and 3. FIG. It can be seen that the difference between the magnetic recording clearance hg and the minimum floating clearance hf increases as the magnetic recording / reproducing gap 7 moves away from the air outflow end 3 where the minimum floating clearance hmin is reached. For example, lx = 1.1m
m, lg = 400 μm, hf = 35 nm, hin = 21
In the case of 0 nm, the magnetic recording clearance hg and the minimum floating clearance h
The difference Δh in f is about 63.6 nm, and the minimum floating clearance h
The value is about 182% of f.

From comparison of FIGS. 1 to 4, the magnitude relationship between the minimum flying clearance hmin and the magnetic recording clearance hg is as follows: the size of the flying clearance hf at the air outflow end of the slider, and the flying clearance hin at the air outflow end of the taper surface. The size of
Distance l from the air outflow end to the air outflow end side of the tapered surface
x, the size of the crown δx, and the distance lg from the air outflow end to the magnetic recording / reproducing gap, and by designing these five variables to appropriate values, the minimum floating clearance and the magnetic recording clearance can be substantially Can be matched. As a result, the flying clearance of the slider can be reduced while maintaining reliability, and the capacity of the magnetic storage device can be increased.

Here, the magnetic recording clearance hg is expressed by the following equation using the above five variables.

[0019] hg = hf + (hin-hf -4δx) · lg / lx + 4δx · x 2 / lx 2 (1) where the crown shape, and both ends of air outflow end side of the air outflow end and the tapered surface It was defined by a quadratic curve.

The magnetic recording clearance hg is the minimum floating clearance hm
The conditional expression for matching with in is δx = (hf-hin) / {4 (2lg / lx-1)} (2) from the expression (1).

Crown height δx, flying clearances h in and h f, slider length lx, which satisfy the above equation (2),
By designing the slider so that the magnetic recording / reproducing gap position lg is set, the magnetic recording clearance hg and the minimum floating clearance hmin can be perfectly matched.

By the way, as a method of measuring the floating clearance,
The optical interference method is generally used in which the slider is levitated on the glass disk, white light or monochromatic light is emitted from the back surface of the glass disk, and the floating clearance is obtained from the interference fringes of the light reflected from the slider surface and the light reflected from the glass disk. Is. Similarly, the crown height can be measured by using the optical interference method.

In this measuring method, the measurement accuracy of the floating clearance is about 2 nm to 4 nm, and considering that such an error is included in the measurement of the floating clearance, it is expressed by the following equation. At the crown height, it is considered that the magnetic recording clearance hg substantially matches the minimum floating clearance hmin.

Δx ≧ (hf-hin) / {6 (2lg / lx-1)} (3)

If the crown height δx is smaller than the expression (3), the difference between the magnetic recording clearance hg and the minimum floating clearance hmin becomes too large to be ignored.

Here, a concrete calculation example will be shown. lx = 1.
25 mm, lg = 30 μm, hf = 40 nm, hin =
If the thickness is 100 nm, the crown height is δx from equation (2).
= 15.8 nm. At this time, the magnetic recording / reproducing gap position, that is, 30 μ from the air outflow end to the air inflow end side
The magnetic recording clearance up to the floating clearance at the m position is h
g = 39.96 nm, where the floating clearance has a minimum value, and the magnetic recording clearance hg and the minimum floating clearance hmin
Is an exact match. Under the same conditions, when the crown height is calculated from the equation (3), δx = 10.5 nm. In this case, the position of the minimum floating clearance is the air outflow end, and the minimum floating clearance is hf = hmin = 40 nm. On the other hand, the magnetic recording gap is hg = 40.45 nm. Therefore, hg
The difference between hmin and hmin is at most about 0.45 nm, and it may be considered that they are substantially equal in consideration of the error in the flying measurement.

Next, a calculation example when the flying posture is larger than the above example will be shown. lx = 1.25 mm, lg = 30 μm,
If hf = 40 nm and hin = 500 nm, (2)
From the formula, δx = 120.8 nm. At this time, the magnetic recording / reproducing gap position, that is, the magnetic recording clearance from the air outflow end to the air inflow end side at the position of 30 μm to the floating clearance is hg = 39.72 nm, where the floating clearance has a minimum value and The recording clearance hg and the minimum flying clearance hmin completely match. Under the same conditions, when the crown height is calculated from the equation (3), δx = 80.53 nm.
In this case, the position of the minimum floating clearance is the air outflow end, and the minimum floating clearance is hf = hmin = 40 nm.
On the other hand, the magnetic recording clearance is hg = 43.49 nm.
Therefore, the difference between hg and hmin is at most about 3.49 nm, and it can be considered that they are substantially equal in consideration of an error in levitation measurement.

Next, a calculation example for clarifying the influence of the magnetic recording / reproducing gap position will be shown. lx = 1.25 mm, l
g = 300 μm, hf = 40 nm, hin = 100 nm
Then, δx = 28.8 nm from the equation (2). At this time, the magnetic recording / reproducing gap position, that is, the magnetic recording clearance from the air outflow end to the air inflow end side at a position of 300 μm to the floating clearance is hg = 33.35 nm, where the floating clearance has a minimum value and The recording clearance hg and the minimum flying clearance hmin completely match. Under the same conditions, the crown height is calculated from equation (3), and δx = 19.
23 nm. In this case, the minimum floating clearance is a position displaced from the air outflow end to the air inflow end side by 150 μm, and the minimum floating clearance is hmin = 39.08 nm. The magnetic recording clearance is hg = 40.37 nm,
The difference between g and hmin is at most about 1.29 nm,
Considering the error of the levitation measurement, it can be considered that they are substantially equal.

As described above, the floating clearance hf at the air outflow end of the slider, the floating clearance h in at the air outflow end side of the tapered surface, the distance lx from the air outflow end to the air outflow end side of the tapered surface, the air outflow Magnetic recording from the edge /
Distance to reproduction gap lg, and crown height δx
By defining the value of to satisfy the expression (3), the magnetic recording clearance hg and the minimum floating clearance hmin can be substantially matched. This is a conditional expression that holds regardless of the diameter and peripheral speed of the magnetic recording medium. However, since the flying posture of the slider generally changes depending on the peripheral speed, when the slider is flying at the outermost peripheral position of the recording area of the magnetic recording medium, the maximum storage capacity of the magnetic storage device is designed. It is preferable that the posture of 3 satisfies the expression (3).

When the condition of the expression (3) is satisfied, hg and hmin can be substantially matched with each other. However, as shown in FIG. When 7 is in the middle of the air bearing surface 4 and the crown height δx is large, the flying clearance may be negative in calculation. However, in reality, there is no negative floating clearance, which means that somewhere on the air bearing surface 4 is in contact.

Therefore, a conditional expression for preventing contact between the slider 1 and the magnetic recording medium 8 will be determined.

At an arbitrary position x on the air bearing surface of the slider,
If the floating clearance is h (x), then h (x) = hf + (hin-hf-4δx) · x / lx + 4δx · x ² / lx ² (4). The condition for the air bearing surface 4 not to come into contact with the magnetic recording medium 8 is that the extreme value of the expression (4) is positive, so that δx <(hin + hf) / 4 + 1/2 · (hin / hf) ^1/2 (5)

Therefore, from equations (3) and (5), (hf-hin) / {6 (2lg / lx-1)} ≤ δx <(hin + hf) / 4 + 1/2 · (hin / hf By setting ^1/2 (6), not only can hg and hmin be substantially matched, but also contact between the air bearing surface 4 and the magnetic recording medium 8 can be prevented.

The second embodiment will be described in detail with reference to FIGS. 6 to 8.

In this embodiment, the slider 1 has an air inflow end 2, an air outflow end 3, and an air bearing surface 4, as shown in the slider flying view of FIG. 6B. As shown in FIG. 6A, the second
When the slider 1 of the embodiment is viewed from the medium facing surface, the air bearing surface 4 has a taper surface 5, a pair of side rails 10, a cross rail 9 connecting the pair of side rails at the air inflow end side, and a pair of side rails with the cross rail 9. Negative pressure groove 1 surrounded by rails
1. A center rail 12 having a magnetic converter 6 near the air outflow end. The pair of side rails 10 has a tapered surface 5
The center rail 12 has a shape that extends from the air outflow end side of the above, is cut before reaching the air outflow end 3, and reaches the air outflow end 3 contrary to the side rail 10. One of the advantages of the slider having such a shape is that the side rails are cut before reaching the air outflow end, and the slider is floated in a posture such that the air inflow end 2 side has a larger floating clearance than the air outflow end 3 side. Therefore, even if the flying posture of the slider is tilted in the width direction, the side rail 10 does not come into contact with the magnetic recording medium 8 before the center rail 12, and the vicinity of the air outflow end of the center rail 12 always has the minimum floating clearance. As a result, the roll rigidity of the slider can be apparently increased. However, when the slider is designed under the conditions described in the first embodiment, the center rail 12
The magnetic recording clearance hg at the position of the magnetic recording / reproducing gap 7 formed above substantially matches the minimum floating clearance hmin, and the values of the floating clearances hs and hmin on the air outflow end side of the side rail 10 approach each other. Will end up. Since the slider 1 flies over the entire circumference of the magnetic recording medium 8,
The inflow direction of air to the slider changes depending on the flying position, and a flying unbalance Δhy in the slider width direction occurs in the flying clearance. As mentioned above, hs and h
If the difference in min is small and Δhy is large, hs and h
It is possible that the magnitude relationship of min is reversed and hs becomes smaller. In that case, the magnetic converter 6 is mounted on the center rail 12, and the advantage that the position is always the minimum floating clearance is lost. In order to avoid this, the side rail 10 is further cut so that the side rail does not come into contact with the slider even if the slider is tilted, or the floating clearance on the air inflow end 2 side is increased to increase the side rail. A method of increasing the floating clearance on the air outflow end side of 10 can be considered. However, the former is not preferable because it has a problem that the roll rigidity of the slider becomes small, and the latter has a problem that the difference between the magnetic recording clearance hg and the minimum floating clearance hmin becomes large. Therefore,
In this embodiment, the crown height δx as described in the first embodiment is formed in the longitudinal direction of the slider, and then the positive camber having the camber height δy is formed also in the lateral direction.

As shown in FIGS. 7 and 8, the camber height δy in the lateral direction is the floating clearance of the pair of side rails 10 on the air outflow end side when the slider 1 is most inclined on the magnetic recording medium 8. If hs1 and hs2 are written so that Δhy = | hs1-hs2 | / 2 <δy (7), the magnetic recording clearance hg will always be substantially the same as the minimum floating clearance hmin, and the side There is no minimum floating clearance on the rail side, and the advantages of the center rail type slider are not lost.

For example, considering a slider shape as shown in FIG. 6, lx = 1.25 mm, lg = 30 μm, h
f = 40 nm, hin = 500 nm, δx = 120.8
nm, the magnetic recording gap hg at the magnetic recording / reproducing gap position, that is, the position 30 μm from the air outflow end.
Is equal to the minimum floating clearance hmin, and hg = hmin
= 39.72 nm, but if the position where the side rail is cut is 150 μm from the air outflow end, the floating clearance here is hs = 44.17 nm. In this floating state, the magnetic recording clearance hg becomes the minimum floating clearance hmin, and the advantages of the present invention and the center rail system are utilized. However, if the slider is tilted at a certain radial position of the magnetic recording medium, for example, Δhy = 10 nm over the entire width of the slider, the air outflow end side of the side rail becomes the minimum floating clearance. A tilt of about 10 nm in the slider width direction can easily occur. Therefore, for example, by forming a positive camber with a camber height δy = 5 nm on the slider in the lateral direction of the slider, the flying clearance at the outflow end of the side rail is increased by about 5 nm, and the slider is inclined as much as before the camber is provided. However, the air outflow end of the side rail does not have the minimum floating clearance, and both the effect of the present invention and the advantage of providing the center rail with the magnetic converter can be satisfied.

FIG. 9 is a side view of the slider of the third embodiment of the present invention when the slider is flying. In this embodiment, the same effect as in the first and second embodiments can be obtained by chamfering the air outflow end 3 of the slider at an appropriate angle.

The distance from the air outflow end 3 of the slider 1 to the air outflow end of the tapered surface is lx, the distance from the air outflow end 3 to the magnetic recording / reproducing gap 7 is lg, and the floating clearance at the air outflow end 3 is hf. Assuming that the floating clearance on the air outflow end side of the tapered surface is h in, the magnetic recording / reproducing gap 7 has an angle θ of sin ⁻¹ {(hin-hf) / (lx-lg)} ≦ θ (8). By chamfering the vicinity, the magnetic recording clearance hg and the minimum floating clearance h
min can be made substantially equal. Particularly, when the crown height δx in the slider longitudinal direction is (hf-hin) / {6 (2lg / lx-1)} <δx (9), the difference between hg and hmin cannot be ignored, so ( The effect of chamfering defined by the equation (8) becomes remarkable.

FIG. 10 is a perspective view of a magnetic memory device having a slider according to the present invention. By providing the slider according to the present invention, the floating clearance of the slider can be narrowed while maintaining reliability, and the capacity of the magnetic storage device can be increased.

[0041]

As described above, according to the present invention, the floating clearance of the slider can be narrowed while maintaining reliability, and the capacity of the magnetic storage device can be increased.

[Brief description of drawings]

FIG. 1 is a side view of a slider according to a first embodiment of the present invention.

FIG. 2 is a side view of the slider for explaining the influence of the crown of the first embodiment of the present invention.

FIG. 3 is a side view of the slider for explaining the influence of the flying posture according to the first embodiment of the present invention.

FIG. 4 is a side view of the slider for explaining the influence of the position of the magnetic converter according to the first embodiment of the present invention.

FIG. 5 is a side view illustrating a contact state between a slider and a magnetic storage medium.

FIG. 6A is a front view of the slider according to the second embodiment of the present invention, and FIG. 6B is a side view of the slider according to the second embodiment of the present invention.

FIG. 7 is a perspective view of a slider according to a second embodiment of the present invention as viewed from the rear.

FIG. 8 is a diagram of a slider according to a second embodiment of the present invention viewed from the rear end.

FIG. 9 is a side view of the slider according to the third embodiment of the present invention.

FIG. 10 is a perspective view of a magnetic storage device including the slider of the present invention.

[Explanation of symbols]

1 ... Slider, 2 ... Air inflow end, 3 ... Air outflow end, 4 ... Air bearing surface, 5 ... Tapered surface,
6 ... Magnetic converter, 7 ... Magnetic recording / reproducing gap,
8 ... Magnetic recording medium, 9 ... Cross rail, 10 ... Side rail, 11 ... Negative pressure groove, 12 ... Center rail.

Front Page Continuation (72) Inventor Hiromitsu Togue 2880 Kunizu, Odawara, Kanagawa Stock Storage Company Hitachi Storage Systems Division (72) Inventor Shuichi Sugawara 2880, Kozu, Odawara, Kanagawa Hitachi Storage System Business Department

Claims (6)

[Claims] 1. A magnetic storage device comprising a magnetic converter, a slider provided with the magnetic converter, a support spring for applying a predetermined load to the slider, and a magnetic recording medium for storing magnetic information. The minimum floating clearance generated by the bearing effect between the slider and the magnetic recording medium during recording / reproduction by the storage device, and the magnetic recording clearance that is the distance between the magnetic recording / reproducing gap of the magnetic converter and the magnetic recording medium are A magnetic storage device characterized by being substantially equal. 2. A magnetic storage device comprising a magnetic converter, a slider provided with the magnetic converter, a support spring for applying a predetermined load to the slider, and a magnetic recording medium for storing magnetic information, wherein the slider is provided. Has an air inflow end, an air outflow end, and an air bearing surface, and the air bearing surface is a tapered surface formed on the air inflow end side,
A positive crown having a crown height δx formed in the longitudinal direction of the air bearing surface, the positive crown height δx, and
A floating clearance hf generated by a bearing effect between the air outflow end of the slider and the magnetic recording medium during reproduction, and a floating clearance hin generated by a bearing effect between the air outflow end side of the tapered surface and the magnetic recording medium, Distance l between the air outflow end and the air outflow end side of the tapered surface
The relational expression of (hf-hin) · lx / {6 (2lg-lx)} ≤ δx holds between x and the distance lg between the air outflow end and the magnetic recording / reproducing gap of the magnetic transducer. A magnetic storage device characterized by the above. 3. An air inflow end, an air outflow end, and an air bearing surface, wherein the air bearing surface is a tapered surface formed on the air inflow end side,
A slider, which is composed of a positive crown having a crown height δx formed in the longitudinal direction of the air bearing surface and has a magnetic recording / reproducing gap formed at an arbitrary position on the air bearing surface, and which floats on a magnetic recording medium. At the positive crown height δx,
A floating clearance hf generated by a bearing effect between the air outflow end and the magnetic recording medium during reproduction, a floating clearance hin generated by a bearing effect between the air outflow end side of the tapered surface and the magnetic recording medium, and the air outflow The distance l between the end and the taper surface on the air outflow end side
The relational expression of (hf-hin) · lx / {6 (2lg-lx)} ≤ δx is established between x and the distance lg between the air outflow end and the magnetic recording / reproducing gap. The slider to do. 4. An air inflow end, an air outflow end, and an air bearing surface, wherein the air bearing surface is a tapered surface formed on the air inflow end side.
A slider, which is composed of a positive crown having a crown height δx formed in the longitudinal direction of the air bearing surface and has a magnetic recording / reproducing gap formed at an arbitrary position on the air bearing surface, and which floats on a magnetic recording medium. At the positive crown height δx,
A floating clearance hf generated by a bearing effect between the air outflow end and the magnetic recording medium during reproduction, a floating clearance hin generated by a bearing effect between the air outflow end side of the tapered surface and the magnetic recording medium, and the air outflow The distance l between the end and the taper surface on the air outflow end side
between x and the distance lg between the air outflow end and the magnetic recording / reproducing gap, (hf-hin) · lx / {6 (2lg-lx)} ≤ δx ≤ (hin + hf) / 4 + 1
A slider characterized in that the relational expression of / 2 · (hin · hf) ^1/2 holds. 5. An air inflow end, an air outflow end, and an air bearing surface, wherein the air bearing surface is a tapered surface formed on the air inflow end side,
A pair of side rails extending from the air inflow end side to the air outflow end side and not reaching the air outflow end, and a pair of side rails extending from the air inflow end side to the air outflow end side and reaching the air outflow end. The center rail comprises one center rail, a positive crown having a crown height δx formed in the longitudinal direction of the air bearing surface, and a positive gamba having a camber height δy formed in the lateral direction of the air bearing surface. A magnetic converter is provided in the vicinity of the air outflow end of the slider, and the slider floats above the magnetic recording medium. The air outflow is generated during the recording / reproducing of the positive crown height δx and the magnetic storage device including the slider. The floating clearance hf between the edge and the magnetic recording medium due to the bearing effect
And a floating clearance h in between the air outflow end side of the tapered surface and the magnetic recording medium due to a bearing effect, and a distance l between the air outflow end and the air outflow end side of the tapered surface.
x and the distance lg between the air outflow end of the slider and the magnetic recording / reproducing gap, (hf-hin) · lx / {6 (2lg-lx)} ≤ δx ≤ (hin + hf) / 4 + 1
The relational expression of / 2 · (hin · hf) ^1/2 holds, and the positive camber height δy,
During recording / reproduction by the magnetic storage device having the slider,
Inclination amount Δh when the slider is most inclined in the lateral direction
A slider having a relational expression of Δhy / 2 ≤ δy with y. 6. An air inflow end, an air outflow end, and an air bearing surface, wherein the air bearing surface is a tapered surface formed on the air inflow end side,
A slider, which is composed of a positive crown having a crown height δx formed in the longitudinal direction of the air bearing surface and has a magnetic recording / reproducing gap formed at an arbitrary position on the air bearing surface, and which floats on a magnetic recording medium. In the above, the crown height δx, and a flying clearance hf generated by a bearing effect between the air outflow end and the magnetic recording medium during recording / reproduction by the magnetic storage device including the slider,
A floating clearance h in between the air outflow end side of the tapered surface and the magnetic recording medium, a distance lx between the air outflow end and the air outflow end side of the tapered surface, the air outflow end and the magnetic recording. / Distance between playback gaps lg
, And the relational expression of 0 <δx <(hf-hin) · lx / {6 (2lg-lx)} holds, and the air outflow end is located near the magnetic recording / reproducing gap by sin ⁻¹ {(( (hin-hf) / (lx-lg)} ≤ θ The chamfer with an angle θ.