JP3266218B2 - Magnetic head and magnetic disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head and a magnetic disk drive, and more particularly to a magnetic head having a TPC type slider and a magnetic disk drive using the same.

[0002]

2. Description of the Related Art TPC (Transverse Pre)
(Surification Contour laterally pressed shape) type slider is disclosed in Japanese Patent Application Laid-Open No. 61-278087 and Japanese Utility Model Application Laid-Open No. 57-122063 (Japanese Application No. 56-581).
No. 8), U.S. Pat. No. 4,673,996, and U.S. Pat. No. 4,870,519. The TPC type slider is provided with a minute step portion on the side of the rail portion, and when incorporated in a rotary actuator type magnetic disk device, the air flow flowing from the lateral direction at a position having a large skew angle causes the step portion to be formed on the step portion. A lift dynamic pressure is generated to prevent a decrease in flying height at a position where the skew angle is large, to secure a constant flying height from the inner circumference to the outer circumference of the magnetic disk, and to stabilize the flying attitude. is there.

A technique for stabilizing the flying height from the inner circumference to the outer circumference of the magnetic disk and stabilizing the flying attitude employs a zone bit recording technique, whereby a high capacity magnetic disk. This is an essential technology for realizing a drive. The zone bit recording technique is described in, for example, JP-A-4-30328, US Pat. No. 4,894,734, and US Pat. No. 5,087,992.

A technique for stabilizing the flying height from the inner circumference to the outer circumference of the magnetic disk and stabilizing the flying attitude is also used in high-density recording in which it is necessary to reduce the flying height to reduce spacing loss. It is extremely important in improving reliability. In the case of a small flying height, the flying height of the magnetic head during reading or writing of the magnetic recording varies only slightly, causing a problem that the magnetic head easily collides with the magnetic disk and destroys data on the magnetic disk. It is. The TPC type slider is an effective means for avoiding a problem associated with a low flying height.

[0005]

The TPC type slider is
Since the lift dynamic pressure is generated in the step by the air flow flowing in from the lateral direction, the lift ratio depends on the area ratio of the air bearing surface and the step, the depth of the step, etc. It is closely related to stabilization and stabilization of the flying attitude, and its optimum value exists. However, the above-mentioned known document does not disclose such an optimum value.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic head and a magnetic disk drive capable of stabilizing the flying height and stabilizing the flying attitude in a wide skew angle range.

[0007] Another object of the present invention is to use zone bit recording technology, whereby high capacity magnetic disks.
An object of the present invention is to provide a magnetic head and a magnetic disk device suitable for realizing a drive.

Another object of the present invention is to provide a magnetic head and a magnetic disk drive which are extremely effective in improving reliability in high-density recording in which it is necessary to reduce the flying height and reduce spacing loss. That is.

Another object of the present invention is to provide a small-sized rotary actuator type magnetic disk drive capable of achieving a constant flying height and a stable flying posture even when the maximum skew angle is large.

[0010]

According to the present invention, there is provided a magnetic head having a slider supporting a magnetic transducer, wherein the slider has at least one rail on a medium facing surface side. The rail portion has an air bearing surface, a first step portion, and a second step portion on the medium facing surface side, and the first step portion has the air bearing surface. At one end in the width direction of the air bearing surface along the length direction of the air bearing surface, and the second step portion is provided at the other end in the width direction of the air bearing surface with the air bearing surface. The width W0 of the air bearing surface, the width W1 of the first step portion, and the width W2 of the second step portion are provided along the length direction, and the sum RW = W0 + W1 + W2 is 100%. When At a ratio, 50% <W0 <70% 35%>W1> 25% 15%>W2> satisfy 5 percent.

A magnetic desk device according to the present invention includes the above-described magnetic head, and the magnetic head is attached to one end of a head support device. The positioning device supports the other end of the head support device and rotates the magnetic head at a predetermined angle on the surface of the magnetic disk. This type of magnetic disk drive
It is called a rotary actuator system.

[0012]

When the width W0 of the air bearing surface, the width W1 of the first step portion, and the width W2 of the second step portion are selected in the above-described ratio, the skew angle is substantially constant within the range of 10 to 25 degrees. It was confirmed that the obtained flying height was obtained and a stable flying posture was obtained.

Further, it was confirmed that the roll angle or the roll was maintained at a substantially constant value within the range of the skew angle, and a stable flying posture was obtained.

The magnetic head and magnetic disk drive according to the present invention are driven by a rotary actuator type positioning device. According to the present invention, even if the skew angle is increased, a substantially constant flying height and a stable flying posture can be obtained, so that the skew angle range can be increased. Therefore, it is possible to cope with a small-sized magnetic disk device in which the maximum skew angle tends to be large.

[0015]

FIG. 1 is a perspective view of a magnetic head according to the present invention, and FIG. 2 is an enlarged sectional view taken on line A2-A2 of FIG. In each figure, the dimensions are exaggerated. Referring to the drawing, the slider 1 has rail portions 101 and 102 on the medium facing surface side. Each of the rail portions 101 and 102 has an air bearing surface 103, a first step portion 104, and a second step portion 105 on the medium facing surface side. The first step portion 104 is provided at one end of the air bearing surface 103 in the width direction along the length direction of the air bearing surface 103, and the second step portion 105 is provided in the width direction of the air bearing surface 103. Is provided along the longitudinal direction of the air bearing surface 103 at the other end edge of the air bearing surface 103. The width W0 of the air bearing surface 103, the first step portion 104
And the width W2 of the second step portion 105 is a ratio when the sum RW = W0 + W1 + W2 is 100%, and is 50% <W0 <70%, 35%>W1> 25
%, 15%>W2> 5%.

In the illustrated magnetic head, the magnetic transducer 2 is provided on the side end surface of the slider 1 located in the length direction of the air bearing surface 103. As shown in FIGS. 1 and 2, when the air bearing surface 103 is facing upward and the side end surface of the slider 1 provided with the magnetic transducer 2 is facing front, the first step portion 104 has an air bearing surface. 103 appears on the left side, and the second step unit 105 appears on the right side. In the illustration, the rail portions 101 and 102
Are provided in parallel with each other at an interval. First step section 104 of rail section 101
1 and 2 appear on the left side of the air bearing surface 103, and the second step portion 105 appears on the right side. Similarly, the first step portion 104 of the rail portion 102 appears on the left side of the air bearing surface 103 in FIGS. 1 and 2, and the second step portion 105 appears on the right side.
This arrangement is such that when the rotary actuator type magnetic disk device is configured, the first step unit 104 is located on the inner peripheral side of the magnetic disk.

The slider 1 has a thickness from the air bearing surface 103 to the opposing surface of 0.65 mm or less, a length of 3 mm or less, and a width of 2.5 mm or less. As a representative example, the thickness is 0.43 mm, the length is 2 mm, and the width is 1.6.
mm slider. The first step unit 104 and the second step unit 105 have a depth d of 1
It is desirable to form so as to satisfy μm ≧ d ≧ 0.7 μm.

As the magnetic transducer 2, an inductive type, an MR (magnetoresistive) type, a combination thereof, or the like is used. These devices can be constituted by thin film devices formed by a process similar to the IC manufacturing technology.
Further, the recording method is not limited to the in-plane recording method, but may be a perpendicular recording method. 21 and 22 are extraction electrodes.

FIG. 3 is a diagram showing a magnetic disk drive according to the present invention. 3 is a positioning device, 4 is a magnetic disk, 5
Is a known head support device, and 6 is a magnetic head according to the present invention. The magnetic disk 4 is driven to rotate in the direction of arrow a by a rotation drive mechanism (not shown). Positioning device 3
Is a rotary actuator type, which supports one end of the head support device 5 and drives the head at a predetermined angle on the surface of the magnetic disk 4 in the direction of the arrow b1 or b2. Thus, writing and reading to and from the magnetic disk 4 are performed on a predetermined track.

FIG. 4 is a diagram for explaining the operation of the magnetic disk device shown in FIG. In the read / write operation, the head support device 5 supporting the magnetic head 6 is driven by the rotary actuator type positioning device 3 as if swinging in the directions of arrows b1 and b2 around the pivot center O1. The position of the magnetic head 6 on the magnetic disk 4 is usually represented by a skew angle.

FIG. 5 is a side view of the magnetic head device, and FIG. 6 is a bottom view of the same. In the head support device 5, a flexible body 52 also made of a thin metal plate is attached to a free end at one longitudinal end of a support body 51 made of a thin metal plate, and the magnetic head 6 is attached to the lower surface of the flexible body 52. It has a structure and applies a load force to the magnetic disk 4 to press the magnetic head 6.
The illustrated flexible body 52 includes two outer frames 521 and 522 extending substantially in parallel with the longitudinal axis of the support 51, and a horizontal frame connecting the outer frames 521 and 522 at an end remote from the support 51. 523 and a tongue-shaped piece 524 extending from a substantially central portion of the horizontal frame 523 so as to be substantially parallel to the outer frame portions 521 and 522 and having a free end at the tip.
One end opposite to the direction in which 23 is provided is attached near the free end of the support body 51 by means such as welding.

On the upper surface of the tongue piece 524 of the flexible body 52, for example, a hemispherical load projection 525 is provided, and the load projection 525 allows the free end of the support body 51 to move from the free end to the tongue piece 524. The load force is transmitted.

The magnetic head 6 is attached to the lower surface of the tongue piece 524 by means such as bonding. The magnetic head 6 has a length direction corresponding to the longitudinal direction of the head support device 5.
It is attached to the magnetic head support device 5. The head support device 5 applicable to the present invention is not limited to the above embodiment.
A head support device that has been proposed or may be proposed can be widely applied.

Next, the effects of the present invention will be described with reference to the actually measured data shown in FIGS. The actual measurement data of FIGS. 2 to 22 are obtained by using the magnetic head shown in FIGS.
6 obtained by configuring the magnetic disk device shown in FIG. A 3.5-inch magnetic disk was used and rotated at a rotation speed of 5400 rpm. The peripheral speed of 11.85 [m / s] is the skew angle (-15.19 degrees)
And the peripheral speed of 24.93 [m / s] corresponds to the skew angle (1).
2.39 degrees). Slider dimensions are 2 × 1.
It is 6 × 0.43 (mm).

First, FIG. 7 shows the flying height (Flying He
8 is a graph showing the relationship between the peripheral speed (velocity) and FIG. 8 is a graph showing the relationship between the roll (Roll) and the peripheral speed. Each characteristic shown in FIGS. 7 and 8 is interpreted in FIG. 7 in accordance with the characteristics A1 to A3 in the table shown below the graph.

When the width W0 of the air bearing surface, the width W1 of the first step portion, and the width W2 of the second step portion are RW = W0 + W1 + W2 = 350 μm, W0 = 210 μm and W1 = 87.5 μm, W2 = 5
2.5 μm In the characteristic A2, W0 = 210 μm, W1 = 105 μm, W2 = 35 μm
m In the characteristic A3, W0 = 210 μm, W1 = 122.5 μm, W2 = 1
It is 7.5 μm. When RW = W0 + W1 + W2 = 350 μm is taken as 100%, the width W0 of the air bearing surface, the first
The ratio of the width W1 of the step portion to the width W2 of the second step portion is as follows.

In the characteristic A1, W0: W1: W2 = 60:
25:15 In the characteristic A2, W0: W1: W2 = 60: 30: 10 In the characteristic A3, W0: W1: W2 = 60: 35: 5. Referring to FIG. 7, the width of the first step portion located inside is shown. Becomes smaller and the width of the second step portion located on the outside becomes larger, the flying height decreases in the low peripheral speed region and increases in the high peripheral speed region (see characteristic A1). Conversely, when the width of the first step portion increases and the width of the second step portion located outside decreases, the flying height increases in the low peripheral speed region and decreases in the high peripheral speed region (characteristic A3). reference). This indicates that there is an optimum range between the characteristics A1 and A3.

The characteristic A2 between the characteristic A1 and the characteristic A3 is
W0 = 60%, W1 = 30%, W2 = 10%, obtained at a ratio of 50% <W0 <70%, 3%
5%>W1> 25% and 15%>W2> 5%. The characteristic A2 is 0.015 μm from the low peripheral speed region of 11.85 [m / s] to the high speed region of 24.93 [m / s].
The flying height characteristic has an extremely small fluctuation range of within, which indicates that the flying height characteristic is within the optimum range. In a magnetic disk drive using a 3.5-inch magnetic disk, it is sufficient that the flying height fluctuation width can be kept at about 0.02 μm. Therefore, if the flying height fluctuation width can be kept within 0.015 μm, it is sufficient for the demand. Can respond to.

In the characteristics A1 and A3, the flying height variation width between the low peripheral speed side and the high peripheral speed side is larger than that of the characteristic A2. However, by selecting the depth d of the first step portion and the second step portion, the flying height variation width can be changed to the flying height variation width required for practical use (for a 3.5-inch magnetic disk, 0.02 μm). Alternatively, by limiting the size of the skew angle, the skew angle can be used within the allowable flying height variation width.

Next, referring to FIG. 8, characteristics A1 to A3
Are both 2 from the low peripheral speed region of 11.85 [m / s].
Up to the high-speed region of 4.93 [m / s], the roll characteristics exhibit an extremely small fluctuation width, and a stable flying posture is obtained.

FIG. 9 shows that W0 = 210 μm, W1 = 87.
A graph showing the relationship between the flying height and the peripheral speed when 5 μm, W2 = 52.5 μm, and the depth d of the step is used as a parameter;
FIG. 10 is a graph showing the relationship between the roll and the peripheral speed. Each characteristic shown in FIGS. 9 and 10 is interpreted according to the characteristics B1 to B8 in the table shown below the graph in FIG. W0 = 210 μm, W1 = 87.
When expressed as a ratio, 5 μm and W2 = 52.5 μm are W0: W1: W2 = 60: 25: 15 as described above.

As shown in FIG. 9, the above-mentioned ratio W0:
When W1: W2 = 60: 25: 15, the depth d is set to 0.7 to
Even if it is adjusted within the range of 1.1 μm, the effect of stabilizing the flying height and stabilizing the roll cannot be obtained.

FIG. 11 shows that W0 = 210 μm and W1 = 8.
7.5 μm, W2 = 52.5 μm, thus the ratio W0:
A graph showing the relationship between the flying height and the peripheral speed when W1: W2 = 60: 25: 15 and the step depth d is used as a parameter;
FIG. 12 is a graph showing the relationship between the roll and the peripheral speed. The characteristics shown in FIGS. 11 and 12 correspond to the characteristics C1 to C4 in the table shown below the graph in FIG.
Is interpreted according to

As shown in FIG. 11, the ratio W
0: W1: W2 = 60: 25: 15, the depth d is 1.
Even if it is adjusted in the range of 1 to 1.2 μm, the effect of stabilizing the flying height cannot be obtained.

FIG. 13 shows that W0 = 210 μm and W1 = 10
FIG. 14 is a graph showing the relationship between the flying height and the peripheral speed when 5 μm and W2 = 35 μm, and the step depth d is used as a parameter;
Is a graph showing the relationship between the roll and the peripheral speed. The characteristics shown in FIGS. 13 and 14 are interpreted according to the characteristics D1 to D7 in the table shown below the graph in FIG. W0 = 210 μm, W1 = 105 μ
When m and W2 = 35 μm are expressed by a ratio, W0: W1: W2 = 60: 30: 10 as described above. This ratio is within the scope of the present invention.

As shown in FIG. 13, the ratio W
0: W1: W2 = 60: 30: 10, the depth d is 0.
At 6 μm, the flying height increases on the low peripheral speed side.
The flying height is constant when the depth d is in the range of 0.7 μm and 0.8 μm. Further, the roll also has the same tendency as the flying height as shown in FIG. Therefore, it is preferable that the depth d of the first step portion and the second step portion is 0.7 μm or more.

FIG. 15 shows that W0 = 210 μm and W1 = 10
5 μm, W2 = 35 μm, and the step depth d is 1.0 μm
FIG. 16 is a graph showing the relationship between the flying height and the peripheral speed when
Is a graph showing the relationship between the roll and the peripheral speed. Each characteristic shown in FIGS. 15 and 16 is interpreted according to the characteristics E1 to E3 in the table shown below the graph in FIG.

As shown in FIG. 15, at the above ratio, when the depth d becomes 1.0 μm, the flying height decreases on the low peripheral speed side. Therefore, the first step unit and the second step unit
Is preferably 1.0 μm or less. When considered in combination with the data in FIGS. 13 and 14, it is preferable that the depth d be selected so as to satisfy 1 μm ≧ d ≧ 0.7 μm.

FIG. 17 shows W0 = 210 μm, W1 = 12
FIG. 18 is a graph showing the relationship between the flying height and the peripheral speed when 2.5 μm and W2 = 17.5 μm and the step depth d is used as a parameter. FIG. 18 is also a graph showing the relationship between the roll and the peripheral speed. The characteristics shown in FIG. 17 and FIG.
, The characteristic F1 in the table illustrated below the graph.
To F8. W0 = 210 μm, W1
= 122.5 μm and W2 = 17.5 μm can be expressed as a ratio, as described above, W0: W1: W2 = 60: 35: 5.
Becomes As shown in FIG. 17, in the above ratio,
Even if the depth d is adjusted in the range of 0.6 to 0.8 μm, the effect of stabilizing the flying height cannot be obtained.

FIG. 19 shows that W0 = 210 μm and W1 = 12
2.5 μm, W2 = 17.5 μm, thus the ratio W0:
FIG. 20 is a graph showing the relationship between the flying height and the peripheral speed when W1: W2 = 60: 35: 5 and the step depth d is used as a parameter. FIG. 20 is a graph showing the relationship between the roll and the peripheral speed. The characteristics shown in FIGS. 19 and 20 correspond to the characteristics G1 to G in the table shown below the graph in FIG.
8 will be interpreted.

As shown in FIG. 19, in the above ratio, even if the depth d is adjusted in the range of 0.3 to 0.7 μm,
The effect of stabilizing the flying height cannot be obtained.

FIG. 21 shows that W0 = 210 μm and W1 = 12
2.5 μm, W2 = 17.5 μm, thus the ratio W0:
FIG. 22 is a graph showing the relationship between the flying height and the peripheral speed when W1: W2 = 60: 35: 5 and the step depth d is used as a parameter. FIG. 22 is a graph showing the relationship between the roll and the peripheral speed. The characteristics shown in FIGS. 21 and 22 correspond to the characteristics G1 to G in the table shown below the graph in FIG.
8 will be interpreted.

As shown in FIG. 21, in the above ratio, even if the depth d is adjusted in the range of 0.9 to 1.0 μm,
The effect of stabilizing the flying height cannot be obtained.

[0044]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a magnetic head and a magnetic disk drive capable of stabilizing the flying height and stabilizing the flying attitude in a wide range of the skew angle. (B) using zone bit recording technology, thereby providing a high capacity magnetic disk; A magnetic head and a magnetic disk device suitable for realizing a drive can be provided. (C) It is possible to provide a magnetic head and a magnetic disk device that are extremely effective in improving reliability in high-density recording in which it is necessary to reduce a flying height and reduce spacing loss. (D) Even if the maximum skew angle is large, it is possible to provide a small-sized rotary-actuator-type magnetic disk device that can achieve a constant flying height and a stable flying posture.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head according to the present invention.

FIG. 2 is an enlarged sectional view taken on line A2-A2 of FIG.

FIG. 3 is a plan view showing a magnetic disk drive according to the present invention.

FIG. 4 is a diagram for explaining the operation of the magnetic disk device shown in FIG.

FIG. 5 is a side view of a magnetic head device constituting the magnetic disk device according to the present invention.

FIG. 6 is a bottom view of a magnetic head device constituting the magnetic disk device according to the present invention.

FIG. 7 is a graph showing a relationship between a flying height (Flying Height) and a peripheral speed (Velocity).

FIG. 8 is a graph showing a relationship between a roll and a peripheral speed.

FIG. 9: W0 = 210 μm, W1 = 87.5 μm, W
6 is a graph showing the relationship between the flying height and the peripheral speed with 2 = 52.5 μm and the depth d of the step as a parameter.

FIG. 10: W0 = 210 μm, W1 = 87.5 μm,
It is a graph which shows W2 = 52.5 micrometers and shows the relationship between a roll and peripheral speed which made depth d of a level difference a parameter.

FIG. 11: W0 = 210 μm, W1 = 87.5 μm,
9 is a graph showing a relationship between a flying height and a peripheral speed when W2 = 52.5 μm and a step depth d is used as a parameter.

FIG. 12: W0 = 210 μm, W1 = 87.5 μm,
It is a graph which shows W2 = 52.5 micrometers and shows the relationship between a roll and peripheral speed which made depth d of a level difference a parameter.

FIG. 13: W0 = 210 μm, W1 = 105 μm, W
6 is a graph showing a relationship between a flying height and a peripheral speed when 2 = 35 μm and a step depth d is used as a parameter.

FIG. 14: W0 = 210 μm, W1 = 105 μm, W
6 is a graph showing the relationship between the roll and the peripheral speed when 2 = 35 μm and the depth d of the step is used as a parameter.

FIG. 15: W0 = 210 μm, W1 = 105 μm, W
6 is a graph showing the relationship between the flying height and the peripheral speed when 2 = 35 μm and the step depth d is 1.0 μm.

FIG. 16: W0 = 210 μm, W1 = 105 μm, W
It is a graph which shows the relationship between a roll and peripheral speed when 2 = 35 micrometers and the step depth d is 1.0 micrometers.

FIG. 17: W0 = 210 μm, W1 = 122.5 μ
10 is a graph showing the relationship between the flying height and the peripheral speed when m and W2 = 17.5 μm and the step depth d is used as a parameter.

FIG. 18: W0 = 210 μm, W1 = 122.5 μ
6 is a graph showing a relationship between a roll and a peripheral speed when m and W2 = 17.5 μm and a step depth d is used as a parameter.

FIG. 19: W0 = 210 μm, W1 = 122.5 μ
10 is a graph showing the relationship between the flying height and the peripheral speed when m and W2 = 17.5 μm and the step depth d is used as a parameter.

FIG. 20: W0 = 210 μm, W1 = 122.5 μ
6 is a graph showing a relationship between a roll and a peripheral speed when m and W2 = 17.5 μm and a step depth d is used as a parameter.

FIG. 21: W0 = 210 μm, W1 = 122.5 μ
10 is a graph showing the relationship between the flying height and the peripheral speed when m and W2 = 17.5 μm and the step depth d is used as a parameter.

FIG. 22: W0 = 210 μm, W1 = 122.5 μ
6 is a graph showing a relationship between a roll and a peripheral speed when m and W2 = 17.5 μm and a step depth d is used as a parameter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slider 101,102 Rail part 103 Air bearing surface 104 First step part 105 Second step part 2 Magnetic transducer 3 Positioning device 4 Magnetic disk 5 Head support device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 21/21 101 G11B 5/31 G11B 5/60

Claims (8)

(57) [Claims] 1. A magnetic head having a slider supporting a magnetic transducer, wherein the slider has at least one rail portion on a medium facing surface side, and the rail portion has air on the medium facing surface side. A bearing surface, a first step portion, and a second step portion, wherein the first step portion has a length of the air bearing surface at one end in a width direction of the air bearing surface. The second step portion is provided along the length direction of the air bearing surface at the other end in the width direction of the air bearing surface, and the second step portion is provided along the length direction of the air bearing surface. , The width W1 of the first step portion and the width W2 of the second step portion are 50% <W0 <70% 35%> assuming that the sum RW = W0 + W1 + W2 is 100%. W1> 2 5% A magnetic head that satisfies 15%>W2> 5%. 2. The slider, wherein the magnetic transducer is provided on a side end surface of the slider positioned in a length direction of the air bearing surface, and wherein the magnetic transducer is provided with the air bearing surface facing upward. 2. The magnetic head according to claim 1, wherein, when the side end surface of the air bearing surface is front, the first step portion appears on the left side of the air bearing surface, and the second step portion appears on the right side. 3. (3)The magnetic transducer element is an air bearing.
On the side end surface of the slider located in the longitudinal direction of the slider surface
Has been The magnetic transducer is installed with the air bearing surface facing up.
When the side end surface of the slider is facing the front,
A first step is located on the right side of the air bearing surface.
And the second step portion appears on the left side Claim 1
On-board magnetic head. 4. The vehicle according to claim 1, wherein two rail portions are provided, and each of the rail portions is provided in parallel at an interval.
The magnetic head according to any one of the above. 5. The slider, wherein a thickness from the air bearing surface to an opposing surface is 0.65 mm or less,
5. The magnetic head according to claim 1, wherein the length is 3 mm or less and the width is 2.5 mm or less. 6. The step portion has a depth d of 1 μm ≧ d.
The magnetic head according to claim 1, wherein satisfies ≧ 0.7 μm. 7. The magnetic head according to claim 1, wherein the magnetic conversion element is a thin film element. 8. A magnetic disk device including a magnetic disk, a magnetic head, a head support device, and a positioning device, wherein the magnetic disk is driven to rotate, and wherein the magnetic head is The head support device supports the magnetic head at one end, and the positioning device supports the other end of the head support device, A magnetic disk drive for rotating a head at a predetermined angle on the surface of the magnetic disk.