JPH1091931A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the magnetic head, in which the roll angle is reduced, the floating attitude is stabilized and a high density recording is properly made, by making the thickness from the floating surface of a slider to the opposite side facing surface thinner and making the length and the width in the air flow direction to prescribed sizes. SOLUTION: The thickness of a slider 1 from floating surfaces 103 and 104 to a counter surface 105 of the opposite side is set to 0.65mm, the length of an air flowing out direction 'a' is made to 1 to 3mm and the width is made 1 to 2.5mm. Note that the thickness of the adhered part of a reading and writing thin film element 2 is ignored. Moreover, the tip parts of the surfaces 103 and 104 are formed into an arc shape similar to other tip parts so as to eliminate the hooking to the surface of a magnetic disk during a contact.start.stop CSS. Moreover, one rail section is provided at the middle section of the width direction and the surface of the rail is made as a floating surface. Thus, the magnetic head, in which the roll angle is reduced, the floating attitude is stabilized and a high density recording is made optimal, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flying magnetic head in which a slider having a flying surface is provided with a read / write element.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk device uses a magnetic head which flies while maintaining a small air bearing gap between the magnetic recording medium and a magnetic recording medium by utilizing dynamic pressure generated by running of the magnetic recording medium. Have been. A flying magnetic head has a basic structure in which a read / write element is attached to a slider having a flying surface on a surface side facing a magnetic recording medium, and a slider made of a magnetic material has a coil.
Winchester-type magnetic head with a core in the form of a composite, a composite magnetic head in which a bulk-type read / write element is inserted into a groove of a slider made of a non-magnetic ceramic structure, a metal. In. A gap (MIG) type magnetic head, and
2. Description of the Related Art A thin-film magnetic head in which a thin-film read / write element is formed on a slider according to a process similar to that of semiconductor manufacturing technology is known.

[0003] Of these various floating magnetic heads,
Winchester type magnetic heads, composite type magnetic heads and MIG type magnetic heads are known, for example, from JP-B-57-5-5.
No. 69, JP-B-58-21329, JP-B-58-28
No. 650, JP-A-62-88112, and the like, and the read / write element is a bulk type in which a core is wound with a wire.

A thin-film magnetic head is disclosed in, for example, Japanese Patent Application Laid-Open No. 55-8 / 55.
No. 4019 and JP-A-55-84020. The thin-film magnetic head has a structure in which a thin magnetic film, a conductor coil film, a coil interlayer insulating film, a protective film, and the like are formed on a slider. The thin-film magnetic head has a very good high-frequency characteristic, essentially excellent high-speed response, and a high The magnetic head is suitable for density recording. Due to this feature, the thin film magnetic head is expected to be able to achieve high speed data transfer and high density magnetic recording to the area that cannot be achieved by a bulk type floating magnetic head when combined with a computer. ing.

[0005] In addition, the thin-film magnetic head is characterized in that the magnetic film constituting the magnetic circuit is made of a metallic magnetic material such as permalloy having a high saturation magnetic flux density and a high magnetic permeability, the magnetic gap length can be reduced, and the read / write pole It has features such as extremely narrow width, and, combined with good high-frequency characteristics due to the low inductance value of the conductor coil film and the magnetic film that forms the core, it has a remarkably superior high-speed response than the bulk type floating magnetic head. And a high recording density can be achieved.

Next, a specific example of a flying magnetic head is shown in FIG.
This will be described with reference to FIG. FIG. 17 is a perspective view of a conventional magnetic head, where 1 is a slider made of, for example, a ceramic structure, and 2 is a read / write element.

The slider 1 has two rail portions 101 and 102 formed on the surface facing the magnetic recording medium at an interval, and the surfaces of the rail portions 101 and 102 are formed as air bearing surfaces 103 and 104 having high flatness. .

The outer dimensions of the slider 1 are usually such that the thickness d from the air bearing surfaces 103, 104 to the opposing surface 105 on the opposite side is 0.1 mm as shown in, for example, US Pat. No. 4,624,048. 85 mm, length L in the air outflow direction is 4
mm, width w in the direction perpendicular to the air outflow direction is 3.2 mm
It is selected as follows. In the combination with the magnetic recording medium, the air bearing surfaces 103 and 104 have tapered portions 103a and 104a on one end side which is an inflow end for an airflow flowing in the direction of arrow a.

In the thin-film magnetic head, the read / write element 2 is a thin-film element formed according to a process similar to the IC manufacturing technology.
It is attached to the air outflow end side opposite to 4a. Although not shown, the Winchester-type magnetic head, composite-type magnetic head, or MIG-type magnetic head is a bulk type in which a core is wound with a wire.

When the read / write element 2 is formed as a thin film element, the dimension of the read / write element 2 is about 0.3 mm in a direction perpendicular to the air outflow direction to satisfy the required electromagnetic conversion characteristics. The diameter D2 from 103 and 104 toward the facing surface 105 is about 0.4 mm. Further, in the thin-film magnetic head, extraction electrodes 201 and 202 are provided on the side end surface of the slider 1 to which the read / write element is attached. These extraction electrodes 201 and 202 are conductively connected to a conductor coil film (not shown) of the read / write element 2. The extraction electrodes 201 and 202 are portions to which the lead wires led to the magnetic disk device are connected. In order to secure the lead wire connection area, the length l1 in the direction orthogonal to the air outflow direction a is about 0.5 mm. The line width h1 as viewed from the air bearing surfaces 103 and 104 in the direction of the facing surface 105 is about 0.2 m.
m.

In the above-described thin-film magnetic head, a large number of thin-film read / write elements are formed on a wafer serving as the slider 1 by making full use of a high-precision pattern forming technique such as photolithography. The read / write element is taken out and manufactured through grooving necessary for the rail portions 101 and 102 and polishing of the floating surfaces 103 and 104.

When used as a magnetic disk drive,
The magnetic head is mounted on the tip of a gimbal support device (not shown), and the flying surfaces 103 and 104 of the slider 1 are brought into spring contact with the surface of the magnetic disk. start. Stop (hereinafter C
SS). When the magnetic disk is stationary, the air bearing surface 103, 1
04 is pressed against the surface of the magnetic disk. When the magnetic disk rotates, as shown in FIG.
Floating surfaces 103, 1 including the tapered surfaces 103a, 104a of
A lift dynamic pressure is generated at 04 and floats with a floating amount g that balances this dynamic pressure with the gimbal spring pressure P.

[0013]

The conventional magnetic head having the above-described dimensions can obtain stable flying characteristics in a region where the flying height is 0.3 μm or more. However, if the flying height g is set to 0.1 μm or less, which is 1/3 or less of that of the related art, in order to cope with high density of magnetic recording, it has been difficult to obtain stable flying characteristics. The reason is that, in the conventional magnetic head, if the flying height is reduced to 0.1 μm or less, for example, it becomes difficult to maintain an appropriate balance between the dynamic pressure and the supporting spring pressure, and the flight attitude (flying height) It is presumed that the posture is collapsed.

The flight attitude can be quantitatively explained by the roll angle. FIG. 19 is a diagram for explaining the roll angle generated between the magnetic disk M and the magnetic head, and β indicates the roll angle. When the roll angle β increases, the flying height g1 as viewed on the rotation inner circumference side and the flying height g2 as viewed on the rotation outer circumference side
And the difference becomes large. Even if the roll angle changes, even if the magnetic disk does not move up and down, there is a problem on the slider side that the flying height changes at a fixed rate from the design center, which is the distance between the magnetic disk and the lower surface of the rail (static gap fluctuation). )
Flight attitude collapses (static gap fluctuation increases).

In a conventional magnetic head having dimensions selected such that the thickness d is 0.85 mm, the length L in the air outflow direction is 4 mm, and the width w in the direction orthogonal to the air outflow direction is 3.2 mm, If g is set to 0.1 μm or less, which is 1/3 or less of the conventional value, it becomes difficult to reduce the roll angle to a considerably large value or less, and it is presumed that the flight attitude is broken.

If the flight attitude is disturbed, the effective flying height increases, and the spacing loss increases, thus limiting the high-density recording. As described above, since the collapse of the flight attitude is a problem on the slider side when the magnetic disk does not move up and down, the out-of-plane vibration caused by the rotation of the magnetic disk and the undulation existing on the surface are considered. As a cause, it is necessary to distinguish and treat the phenomenon (dynamic gap fluctuation or followability) in which the floating gap (floating amount) fluctuates due to the vertical movement of the rotating disk as a different technical item.

An object of the present invention is to provide a flying magnetic head which has excellent flying stability and is suitable for high-density recording.

[0018]

In order to solve the above-mentioned problems, the present inventors have intensively studied the dimensions of a magnetic head in order to obtain a slider having excellent flying stability. As a result, the thickness from the floating surface to the opposing surface is 0.65 mm or less, and the length in the air outflow direction is 1 mm to
3mm, width in the direction perpendicular to the air outflow direction is 1mm ~
It has been found that a slider having a dimension of 2.5 mm can ensure high flying stability while maintaining a low flying height.

The reason why the magnetic head having the above dimension has high flying stability is not always clear, but the magnetic head having the above dimension has a smaller size than a conventional magnetic head. It is presumed that the roll angle (or roll value) and the change width thereof become significantly smaller than expected and the flight attitude is kept stable.

In the present invention, as a means for reducing the roll angle and the width of change thereof, the slider shape is selected, so that operations such as changing the movement center of the slider are unnecessary. For this reason, it is possible to stabilize the flying attitude and reduce the flying height while ensuring reliability without causing problems such as deviation of the mass with respect to the slider movement center and unevenness of the movement moment.

The thickness d from the air bearing surface to the opposing surface is equal to 0.
If it exceeds 65 mm, the flying stability will be poor. The reason is presumed to be that the position of the center of gravity shifts closer to the facing surface side that is the connection surface with the gimbal. On the other hand, if the thickness is too small, the rigidity of the slider is reduced, and the slider is twisted or deformed, so that the flatness of the air bearing surface cannot be secured. Therefore, the thickness d is set to a lower limit within a range of 0.65 mm or less, which can secure the required flatness of the air bearing surface.

When the length L and the width w are smaller than 1 mm, the flying stability is deteriorated. It is presumed that the reason is that it becomes impossible to secure a sufficient flying surface area to secure stable flying characteristics.

[0023]

FIG. 1 is a perspective view of a magnetic head according to the present invention, FIG. 2 is a front view of a slider, FIG. 3 is a bottom view similarly viewed from the floating surface side, and FIG. 4 is a side view. In the figure, the same reference numerals as those in FIG. 17 indicate the same components. The slider 1 has a thickness d of 0.65 mm or less from the air bearing surfaces 103 and 104 to the opposite facing surface 105, a length L of 1 mm to 3 mm in the air outflow direction (running direction), and an air outflow direction a. The width w in the orthogonal direction is 1 mm to 2.5 m
m. Since the thickness of the attached portion of the read / write element 2 is substantially negligible compared to the length L, the length L is
The size is substantially the size including the read / write element 2. The read / write element 2 in the embodiment is a thin film element.

Also, as shown in the embodiment of FIGS. 1 to 4, the flying surfaces 103 and 104 of the slider 1 may be flat without a tapered surface. The ends (a) and (b) of the air bearing surfaces 103 and 104 as viewed in the air outflow direction a are used to prevent the air bearing surfaces 103 and 104 from catching on the surface of the magnetic disk during CSS.
It is desirable to form it in an arc shape. Other ends (c), (d)
Can also be formed in an arc shape. Further, it is also possible to adopt a structure in which one rail portion is provided at a substantially intermediate portion in the width direction, and the surface of this rail portion is used as a floating surface. In the case of this structure, it is convenient to reduce the overall size.

Further, when the length and width of the slider are 1 mm or more and 1.5 mm or less, the entire surface on the side facing the disk may be the floating surface.

FIG. 5 is a perspective view showing another embodiment of the magnetic head according to the present invention. In the embodiment of FIG. 5, the flying surface 6 of the slider 1 has a flat surface having no rail, and its edges (a) to (d) are formed in an arc shape.

FIG. 6 is a perspective view showing another embodiment of the magnetic head according to the present invention. In the embodiment of FIG. 6, similarly to the conventional example of FIG. 16, the floating surfaces 103 and 104 are provided with tapered surfaces 103a and 104a.

According to the above-described magnetic head, the storage area is increased, and in combination with the head supporting device, 0.2%
With a low flying height of less than μm, stable flying characteristics can be obtained and high durability can be obtained. Next, a specific example will be described. In the structure shown in the embodiment of FIGS. 1 to 4, the external dimensions of the slider 1 are as follows: thickness d = 0.65 mm length L = 2.8 mm width w = 2.3 mm width w1 = 0. 3 mm.

The magnetic head was mounted on a head support device to obtain a magnetic disk drive. FIG. 7 is a diagram showing the relationship between the magnetic disk device and the magnetic disk obtained in this manner. M is a magnetic disk, 3 is a head support device, and 4 is a positioning mechanism. The magnetic disk M is driven to rotate in the direction of arrow a by a rotation drive mechanism (not shown). The head support device 3 is moved by the positioning mechanism 4 on the rotational diameter O1.
It is driven and positioned in the direction of arrow b1 or b2,
As a result, at a predetermined track, magnetic recording is performed between the magnetic disk M and the magnetic head. Reproduction is performed.
The magnetic disk drive shown in FIG. 7 is called a linear actuator type magnetic disk drive. In addition, there is also known a swing arm type magnetic disk device in which a head support device is driven to rotate on the surface of a magnetic disk and the position is changed while changing the angle (skew angle) of the magnetic head with respect to the rotation direction of the magnetic disk M. For these types,
The present invention is naturally applicable.

In the head support device 3, one end of a support 32 made of an elastic metal thin plate is attached and fixed to a rigid arm 31 attached to the positioning mechanism 4 by means of couplings 311 and 312. A flexible body 33 also made of a thin metal plate is attached to a free end at one end of
A magnetic head 34 according to the present invention is provided on the lower surface of the flexible body 33.
Is attached. The support 32 has a portion attached to the rigid arm portion 31 as an elastic spring portion 321. The rigid beam portion 3 is connected to the elastic spring portion 321.
22 is formed. The rigid beam portion 322 has flanges 322a and 322b formed on both sides by bending so as to obtain a load force for pressing the magnetic head 34 against the magnetic disk M. In the embodiment, the length, plate thickness, spring property and the like of the rigid arm 31, the support 32 and the flexible body 33 are determined so that the load from the magnetic head 34 to the magnetic disk M is 9.5 g.

FIG. 8 is a front view of a main part of the head supporting device, and FIG. 9 is a bottom view of the same, viewed from the floating surface side. The flexible body 33 includes two outer flexible frames 331 and 332 extending substantially in parallel with the longitudinal axis O2 of the support 32, and outer flexible frames 331 and 33 at ends remote from the support 32.
2 and a central tongue 334 extending from a substantially central portion of the horizontal frame 333 so as to be substantially parallel to the outer flexible frame portions 331 and 332 and having a free end at the tip. One end on the opposite side to the direction in which the horizontal frame 333 is located,
It is attached to the vicinity of the free end of the support 32 by means such as welding (e).

The upper surface of the central tongue 334 of the flexible body 33 is provided with, for example, a hemispherical load projection 335. The load is transmitted to the portion 334.
The magnetic head 3 according to the present invention is provided on the lower surface of the central tongue 334.
4 is fixed by means such as bonding.

In the configuration shown in FIG. 7, when the magnetic disk M was levitated at a portion where the peripheral speed became 9 m / s,
A flying height of μm was obtained.

Further, when the dimensions of the slider 1 are set to the dimensions described above and a general thin-film read / write element having a track width of 8 μm and a track pitch of 12.7 μm is formed, a thin-film magnetic head using a slider of conventional dimensions is used. Thus, the storage area on the magnetic disk M can be increased by about 80 tracks.

FIG. 10 is a diagram showing the flying characteristic measurement data of the magnetic disk device shown in FIGS. The measurement data in FIG. 10 is obtained by a measurement system as shown in FIG. In FIG. 11, 5 is an acoustic. Emission. A sensor (hereinafter referred to as an AE sensor), 6 is a filter, 7 is an amplifier, and 8 is an oscilloscope. The measurement conditions in FIG. 11 are as follows.

[0036] As shown in the measurement data of FIG. 10, in the magnetic disk drive using the flying magnetic head 34 according to the present invention, the AE
There is almost no sensor output. From this, it can be seen that the flying magnetic head according to the present invention does not lose its flight attitude and has stable flying characteristics even when the flying height is as low as 0.09 μm.

The fact that the magnetic head according to the present invention maintains a stable flying attitude with a low flying height is supported by the actually measured data in FIGS. The data shown in FIGS. 12 to 15 are obtained by a swing arm type magnetic disk drive which rotates the head support device on the surface of the magnetic disk and positions it while changing the angle (skew angle) of the magnetic head with respect to the rotation direction of the magnetic disk M. It is obtained.

12 to 15, the horizontal axis indicates the peripheral speed (m / s) of the magnetic disk and the skew angle (degree) of the magnetic head, and the vertical axis indicates the roll value (μm).
The roll value is an absolute value difference between the outer-side floating amount and the inner-side floating amount on the air bearing surface. For example, referring to FIG. 18, the difference | g2−g1 | between the flying height g2 of the rail 101 and the flying height g1 of the rail 102 is obtained. Therefore, a large roll value and a large roll angle are synonymous.
FIG. 12 shows the characteristics when a 1.8-inch diameter magnetic disk is used, FIG. 13 shows the characteristics when a 2.5-inch diameter magnetic disk is used, and FIG. 14 shows the case when a 3.5-inch magnetic disk is used. FIG. 15 shows the characteristics when a 5.25 inch magnetic disk is used. FIG.
2 to □ displayed at the data plot points throughout FIG.
The mark indicates data when a magnetic head having a dimension of L × W × d = 2.8 × 2.3 × 0.65 is used, and the + mark indicates L × W × d = 2 × 1.6. The data when a magnetic head having a dimension of × 0.45 is used is shown. The mark Δ indicates data when a magnetic head having a dimension of L × W × d = 4 × 3.2 × 0.85 is used. Each is shown. Therefore, the symbols .DELTA. Indicate data of the conventional magnetic head, and the symbols .quadrature. And + indicate data of the magnetic head according to the present invention.

As shown in FIGS. 12 to 15, the magnetic head according to the present invention has a smaller roll value, that is, a smaller roll angle than the conventional magnetic head. In particular, the roll angle of the magnetic head according to the present invention becomes significantly smaller than the roll angle of the conventional magnetic head toward the outer periphery where the peripheral speed increases. Moreover, in the magnetic head according to the present invention, the difference in roll value between the innermost circumference and the outermost circumference of the magnetic disk is significantly smaller than that of the conventional magnetic head. Therefore, according to the present invention, a magnetic head having a stable flying attitude can be obtained over the entire surface of the magnetic disk. Also,
Since the roll angle is reduced, the effective flying height is reduced, the spacing loss is reduced, and a magnetic head suitable for high recording density is obtained.

The data shown in FIG. 12 to FIG. 15 include technical matters which are more remarkable. That is, if the roll value or the roll angle is proportional to the dimension of the magnetic head, the □ mark, which is the data of the magnetic head having the dimension of (2.8 × 2.3 × 0.65), is (4 ×
The data must be about 70% of the data of the mark Δ, which is the data of the conventional magnetic head having a dimension of 3.2 × 0.85). Further, a + mark, which is data of a magnetic head having a dimension of (2 × 1.6 × 0.45),
The data must be located at about 50% of the data of the mark Δ, which is the data of the conventional magnetic head having the dimension of (4 × 3.2 × 0.85). However, the data in FIGS. 12 to 15 are not so. (2.8 × 2.
The marks □ and +, which are data of magnetic heads having dimensions of (3 × 0.65) and (2 × 1.6 × 0.45), indicate values that are close to each other, and are (4 × 3.2). ×
There is a clear significant difference between the data of the conventional magnetic head having the dimension of 0.85) and the mark Δ. Looking at these data, a dimension ratio of 75
%, It can be estimated that there is a critical point for reducing the roll angle.

12 to 15, the above-mentioned significant difference is particularly remarkable on the outer peripheral side where the relative speed between the magnetic disk and the magnetic head is increased. Therefore, on the outer peripheral side of the magnetic disk where the roll angle must be reduced, the roll angle is reduced beyond the predictable range, the effective flying height is reduced, the spacing loss is reduced, and high-density recording is performed. Can be achieved.

The same roll reduction effect can be obtained with the linear actuator type magnetic disk drive shown in FIG. FIG. 16 shows a magnetic disk peripheral speed (m / s) and a roll value (μ) in a linear actuator type magnetic disk device.
FIG. 7 is a graph showing the relationship with m). The characteristics indicated as 100% are characteristics when a magnetic head having a dimension of L × w × d = 4 × 3.2 × 0.85 is used, and the characteristics indicated as 70% are L × w × d = 4 × 3.2 × 0.85. Characteristics when a magnetic head having a dimension of w × d = 2.8 × 2.3 × 0.65 is used,
The characteristics indicated as 50% indicate the characteristics when a magnetic head having a dimension of L × w × d = 2 × 1.6 × 0.45 is used.

Referring to FIG. 16, (2.8 × 2.3 × 0.6
When a magnetic head having dimensions of (5) and (2 × 1.6 × 0.45) is used, (4 × 3.2 × 0.8)
It can be seen that the roll value is significantly lower than in the case of using the magnetic head having the dimension of 5), as described with reference to FIGS. Moreover,
This significant difference is particularly conspicuous on the outer peripheral side where the relative speed between the magnetic disk and the magnetic head increases.
Therefore, even when a linear actuator type magnetic disk drive is configured, the roll angle is reduced beyond the predictable range on the outer peripheral side of the magnetic disk, where the roll angle should be reduced, thereby reducing the effective flying height. As a result, the spacing loss can be reduced, and high-density recording can be achieved.

As described above, according to the present invention, the roll angle can be reduced within a range that cannot be estimated from the dimension ratio between the conventional magnetic head and the conventional magnetic head, and the unique effect that a magnetic head with a stable flying attitude can be provided can be provided. can get.

[0045]

As described above, according to the present invention, the following effects can be obtained. (A) The slider has a thickness of 0.65 mm or less from the flying surface to its opposing surface, and a length of 1 mm in the air outflow direction.
３3 mm, and the width in the direction orthogonal to the air outflow direction is 1
mm to 2.5 mm, has high floating stability,
A magnetic head suitable for high-density recording can be obtained. (B) It is possible to provide a magnetic head suitable for high-density recording in which the roll angle is reduced in a range that cannot be estimated from the dimension ratio between the magnetic head and the conventional magnetic head, and the flying posture is stabilized. (C) As a means for reducing the roll angle, the shape of the slider is selected to cope with the problem. Therefore, the flying posture can be stabilized without causing a problem such as bias of the mass with respect to the slider movement center and non-uniformity of the movement moment. It is possible to provide a magnetic head that can reduce the flying height while ensuring reliability.

[Brief description of the drawings]

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

FIG. 2 is a front view of a slider according to the present invention.

FIG. 3 is a bottom view of the slider according to the present invention as viewed from the floating surface side.

FIG. 4 is a side view of the slider according to the present invention.

FIG. 5 is a perspective view of another embodiment of the magnetic head according to the present invention.

FIG. 6 is a perspective view of another embodiment of the magnetic head according to the present invention.

FIG. 7 is a diagram showing a magnetic disk drive using a magnetic head according to the present invention.

FIG. 8 is a front view of a main part of the head support device.

FIG. 9 is a bottom view of the head support device as viewed from the floating surface side.

FIG. 10 is a diagram showing flying stability measurement data of a magnetic disk drive using a magnetic head according to the present invention.

11 is a diagram showing a measurement system for obtaining the measurement data of FIG.

FIG. 12 is data showing a relationship between a magnetic disk peripheral speed (m / s), a skew angle (degree) of a magnetic head, and a roll value (μm).

FIG. 13 is data showing a relationship between a magnetic disk peripheral speed (m / s), a skew angle (degree) of a magnetic head, and a roll value (μm).

FIG. 14 is data showing a relationship between a peripheral speed of a magnetic disk (m / s), a skew angle (degree) of a magnetic head, and a roll value (μm).

FIG. 15 is data showing a relationship between a magnetic disk peripheral speed (m / s), a skew angle (degree) of a magnetic head, and a roll value (μm).

FIG. 16 is a graph showing a relationship between a magnetic disk peripheral speed (m / s) and a roll (μm) in a linear actuator type magnetic disk device.

FIG. 17 is a perspective view of a conventional magnetic head.

FIG. 18 is a diagram illustrating an operation state of a floating magnetic head.

FIG. 19 is a diagram showing an operating state of the flying magnetic head.

[Explanation of symbols]

 Reference Signs List 1 slider 2 read / write element 103, 104, 106 flying surface d thickness from flying surface to its facing surface L length in air outflow direction w width in direction perpendicular to air outflow direction

Claims (2)

[Claims] 1. A magnetic head in which a read / write element made of a thin film element is attached to an air outflow end side of a slider having a floating surface on a surface facing a magnetic recording medium, wherein the slider has the floating surface. The thickness from the surface to the opposite surface is 0.65 mm or less, and the length in the air outflow direction is 1 m.
a magnetic head having a width in the direction perpendicular to the air outflow direction of 1 to 2.5 mm. 2. The magnetic head according to claim 1, wherein the air bearing surface is a flat surface having no tapered surface in an air inflow portion.