JPH10334437A - Floating type head and information recording/ reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating type head and an information recording/ reproducing device capable of recording/reproducing data with a high output up to a boundary between a data recording part and a head sliding part in a recording medium different in floating assurance height between the recording part and the head sliding part regarding a floating type head and an information recording/reproducing device executing information recording/reproducing in a recording medium different in floating assurance height between a data recording part and a head sliding part. SOLUTION: The floating height of an inner rail 132 provided in a data recording area is set nearly equal to a floating assurance height in a data recording area, the floating height of an outer rail 133 provided in a head sliding area is set nearly equal to a floating assurance height in the head sliding area, and a head is slid on a recording medium while being rolled with a height set nearly equal to the floating assurance height of the data recording area in the data recording area and a height set nearly equal to the floating assurance height of the head sliding area in the head sliding area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flying head and an information recording / reproducing apparatus, and more particularly to recording / reproducing information on / from recording media having different flying heights between a data recording section and a head sliding section. The present invention relates to a flying head and an information recording / reproducing device. With the recent increase in multimedia, the amount of data handled by software has increased dramatically. Accordingly, it has been desired to increase the capacity and miniaturization of information recording / reproducing devices such as magnetic disk devices without increasing the size. ing.

On the other hand, in order to increase the recording density of information on a magnetic disk in order to realize a larger capacity and a smaller size, it is necessary to reduce the distance between the magnetic head and the magnetic disk.
To reduce the distance between the magnetic head and the magnetic disk,
It is necessary to smooth the surface of the magnetic disk so that the magnetic head does not contact the magnetic disk and damage the magnetic head or damage the magnetic disk.

However, when the surface of the magnetic disk is smoothed, the magnetic head is easily attracted to the magnetic disk, and there is a problem of contact between the magnetic head and the magnetic disk.
In order to solve the contact between the magnetic head and the magnetic disk when the surface of the magnetic disk is smoothed, it is required to improve the flying attitude.

[0004]

2. Description of the Related Art In a magnetic recording medium mounted on a conventional magnetic disk drive, the guaranteed flying height of a magnetic head from the innermost circumference to the outermost circumference is set substantially constant. However, in recent years, the demand for high-density recording and the like has tended to smooth the surface of the magnetic recording medium and lower the guaranteed flying height of the magnetic head.

On the other hand, a magnetic recording medium has a data area for recording and reproducing normal information, and a CSS (Contact Start Std) for retracting a magnetic head at times other than recording and reproduction.
op) area is set. Therefore, as a solution to the problem of attraction between the magnetic head and the magnetic recording medium, as a solution to the problem, the surface texture of the CSS area is coarser than the surface shape of the data area for recording information, and the height of the magnetic head is assured to be higher. A medium has been proposed.

FIG. 14 is a conceptual diagram of a conventional zone texture medium. The zone texture medium 1 is made of a magnetic recording medium. A CSS area 2 is formed on the inner circumference side, and a data area 3 is formed on the outer circumference side. CSS area 2
Has a large number of microprojections (textures) formed on the surface, and has a shape that makes it difficult for the magnetic head to be attracted. The data area 3 is formed to have a flat surface shape, so that the magnetic head can easily approach the medium surface.

In the zone texture medium 1, when information is not recorded or reproduced, the magnetic head 10 is
When the magnetic head is located in the area 2, the guaranteed flying height of the CSS area 2 is set high, so that the magnetic head does not easily come into contact with the zone texture medium 1, and the magnetic head 10 is used to record and reproduce information. When placed in area 3,
Since the guaranteed flying height of the data area 3 is low, the magnetic head is in close contact with the zone texture medium 1, and high-output recording and reproduction can be performed.

FIG. 15 is a schematic diagram of a magnetic disk drive on which a zone texture medium is mounted. The magnetic disk drive 10 has a configuration in which a zone texture medium 1 is rotatably held by a spindle motor 12 fixed to a base 11. The magnetic head 13 is fixed to the tip of an arm 14 rotatably held in the radial direction (the direction of arrow B) of the zone texture medium 1, and is driven by a voice coil motor 15 provided at the other end of the arm 14. 1 in the radial direction (arrow B direction).

The magnetic head 13 floats from the zone texture medium 1 by the flow of air generated by the rotation of the spindle motor 12 in the zone texture medium 1 and accesses the zone texture medium 1. FIG. 16 shows a perspective view of an example of a conventional magnetic head. Conventional magnetic head 20
Is formed by forming an MR film, a GMR film, terminals, and the like on a wafer made of Al ₂ O ₃ TiC (altic) using a thin film forming technique, and then cutting out and cutting an ABS (Air Bearing Surface) surface or the like. You. When the ABS 21 of the magnetic head 20 faces the zone texture medium 1, the inner rail 22 faces the CSS area 2 of the zone texture medium 1, that is, on the inner side, in the rotation direction of the zone texture medium 1 (arrow A). Direction).
The data area 3 side of the zone texture medium 1, that is,
An outer rail 23 is formed on the outer peripheral side so as to extend in the rotation direction of the zone texture medium 1 (the direction of arrow A).

A gap 24 for recording and reproducing information facing the zone texture medium 1 is provided on the outer rail 2.
The third zone texture medium 1 is formed on the end face on the rotation direction side. At this time, the conventional magnetic head 20 processes the height a of the inner rail 22 and the height b of the outer rail 23 so that the ABS 21 is held parallel to the surface of the zone texture medium 1. Was.

In the zone texture medium 1 shown in FIG. 14, the CSS area 2 is formed on the inner peripheral side, but the CSS area 2 is formed on the outer peripheral side.
Some zone texture media in which SS regions are formed also appear.

[0012]

However, in the conventional zone texture medium, since the flying height is different between the CSS area and the data area, the magnetic head is located on the innermost side of the data area, In the case of both the data area and the data area, the flying height guarantee height is high on the CSS area side,
In addition, since the flying height is low on the data area side, the magnetic head may be inclined and come into contact with the medium to cause a head crash or the like.

FIG. 17 is a diagram showing the flying attitude of the magnetic head when the conventional magnetic head scans the innermost peripheral side of the data area of the zone texture medium. Conventional magnetic head 1
3 is an ABS 21 facing the zone texture medium 1
Is formed so as to be parallel to the surface of the zone texture medium 1. Therefore, when scanning the outermost peripheral side of the data area 23 of the zone texture medium 1, the inner peripheral side is higher as shown in FIG. The side is inclined low.
For this reason, if the guaranteed flying height in the data area 23 is reduced, the outer peripheral side of the magnetic head 13 comes into contact with the data area 23, which damages the magnetic head 13 and makes it difficult to read data. Data area 23
As a result, it was difficult to increase the output power, which prevented high density.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a high-output data up to a boundary between a data recording unit and a head sliding unit in a recording medium in which a flying height is different between a data recording unit and a head sliding unit. It is an object of the present invention to provide a flying head and an information recording / reproducing apparatus capable of recording and reproducing information.

[0015]

According to a first aspect of the present invention, there is provided a data recording area provided on an inner peripheral side for recording data,
The disk recording medium is provided on the outer peripheral side of the data recording area, and is provided to face a disk-shaped recording medium having a different flying assurance height from a head gliding area which waits for access to the data recording area. An inner rail is formed on the peripheral side, an outer rail is formed on the outer peripheral side, and sliding on the disk-shaped recording medium according to the shapes of the inner rail and the outer rail,
In a flying head for recording and reproducing data, first flying means formed on the inner rail and slid so that the flying height on the data recording area side is approximately equal to the guaranteed flying height of the data recording area. And a second levitation means formed on the outer rail and slid such that the levitation height on the side of the head slidable area is approximately equal to the height guaranteed for levitation in the head slidable area.

According to the first aspect, the first rail means causes the outer rail to float about the guaranteed flying height of the data recording area, and the second flying means causes the inner rail to float about the guaranteed flying height of the head sliding area. . For this reason, when the floating head is located at the boundary between the data recording area and the head sliding area, the head sliding area side of the floating head is floating to the height that guarantees the floating of the head sliding area. Does not come into contact with the head sliding area, and the data recording area side of the flying head is flying at about the guaranteed flying height of the data recording area, so record data with high output in the data recording area. Can be. Therefore, data can be recorded up to the boundary between the data recording area and the head sliding area, and the data recording amount can be increased. At this time, the flying head comes into contact with the head sliding area, and Damage and medium damage can be prevented.

Preferably, the first levitation means determines the height of the surface of the inner rail facing the disc-shaped recording medium so that the levitation height of the inner rail is the guaranteed levitation height of the data recording area. So that the height of the surface of the outer rail facing the disk-shaped recording medium is about the same as the guaranteed flying height of the head sliding area. It is characterized by having been set.

According to the second aspect, the height of the inner rail provided on the data recording area side is set so that the flying height is approximately equal to the guaranteed flying height of the data recording area, and the inner rail is provided on the head sliding area side. By setting the height of the outer rail set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area, the head is positioned at the data recording area side at the guaranteed flying height of the data recording area and the head sliding area side. Thus, the head slides on the recording medium while rolling at a height of about the guaranteed flying height of the head sliding area. Therefore, when the floating head is located at the boundary between the data recording area and the head sliding area, the head sliding area side of the floating head is floating to the height guaranteed for the head sliding area. There is no contact with the head sliding area, and the data recording area side of the flying head is flying at about the guaranteed flying height of the data recording area, so data can be recorded in the data recording area with high output. it can. Therefore, data can be recorded up to the boundary between the data recording area and the head sliding area, and the data recording amount can be increased.
At this time, the flying head comes in contact with the head sliding area,
Head damage and medium damage can be prevented.

According to a third aspect of the present invention, the height of the laminated member laminated on the surface of the outer rail facing the disk-shaped recording medium is approximately equal to the height of the head sliding area that is guaranteed to float. Is set. According to the third aspect, the height of the laminated member laminated on the surface of the outer rail facing the disk-shaped recording medium is set so as to be approximately equal to the flying assurance height of the head sliding area. Since there is no contact with the disk-shaped recording medium, the head can be positioned over the data area and the head sliding area, so that data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium.

The fourth step is a step formed at one end of the floating surface, the inner rail being disposed on the inner side of the disk, and the step formed at the other end of the floating surface. In a floating head having at least an outer rail disposed on the outer side, the height of the outer rail is set higher than the height of the inner rail.

According to the fourth aspect, by setting the height of the outer rail higher than the inner rail, the flying height of the outer rail can be set higher than that of the inner rail. Since the head can be positioned over the data area and the head sliding area by setting the distance to about the same, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium.

The fifth step is a step formed at one end of the floating surface, which is an inner rail disposed on the inner side of the disk, and a step formed at the other end of the floating surface. In a flying head having at least an outer rail disposed on the outer side, a width of the outer rail is set wider than a width of the inner rail.

According to claim 5, the width of the outer rail is
By setting it wider than the width of the inner rail, the flying height of the outer rail can be set higher than that of the inner rail, so that the flying height of the inner rail can be about the same as the guaranteed flying height of the data area. Since it can be positioned over the sliding area, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium.

According to a sixth aspect of the present invention, there is provided a data recording area provided on the inner peripheral side for recording data, and a head sliding area provided on the outer peripheral side of the data recording area and waiting for access to the data recording area. The floating assurance height is provided opposite to the disc-shaped recording medium, the inner rail is formed on the inner peripheral side of the disc-shaped recording medium, the outer rail is formed on the outer peripheral side, and the shape of the inner rail and the outer rail is formed. Accordingly, a floating head that slides on the disk-shaped recording medium in an inclined direction in the rotation direction of the disk-shaped recording medium and performs the data recording / reproduction in a floating type head at a height of about the guaranteed floating height of the data recording area. Means formed on the outer rail and formed at a portion of the outer rail lower than the guaranteed flying height of the head sliding area when sliding on the data recording area; Wherein the Lumpur has a the head higher than the flying guarantee the height of the gliding area position become so formed notch.

According to the present invention, when the head is positioned at the boundary between the data area and the head sliding area, the notch is formed in a portion of the outer rail lower than the guaranteed flying height of the head sliding area. Since there is no contact with the head sliding area, the head can be positioned over the data area and the head sliding area, and thus data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium.

A seventh aspect of the present invention provides a recording medium having different flying heights between a data recording area for recording data and a head sliding area waiting for access to the data recording area, and an inner circumferential side of the disc-shaped recording medium. An inner rail is formed on the outer peripheral side of the outer rail, and a floating type head that slides on the disk-shaped recording medium according to the shape of the inner rail and performs recording and reproduction of the data. In the recording / reproducing apparatus, the flying head is provided on the inner rail, and the first rail is provided on the outer rail, and first flying means for floating and sliding the inner rail at a guaranteed flying height of the data recording area, A second levitation means for causing the outer rail to levitate at the guaranteed flying height of the head gliding area and for gliding.

According to the seventh aspect, the outer rail is floated by the first flying means by about the guaranteed flying height of the data recording area, and the inner rail is floated by the second flying means by the guaranteed flying height of the head sliding area. . For this reason, when the floating head is located at the boundary between the data recording area and the head sliding area, the head sliding area side of the floating head is floating to the height that guarantees the floating of the head sliding area. Does not come into contact with the head sliding area, and the data recording area side of the flying head is flying at about the guaranteed flying height of the data recording area, so record data with high output in the data recording area. Can be. Therefore, data can be recorded up to the boundary between the data recording area and the head sliding area, and the data recording amount can be increased. At this time, the flying head comes into contact with the head sliding area, and Damage and medium damage can be prevented.
Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

[0028] Preferably, the first levitation means is configured such that the height of the surface of the inner rail facing the disc-shaped recording medium is determined by the levitation height of the inner rail. So that the height of the surface of the outer rail facing the disk-shaped recording medium is approximately equal to the guaranteed flying height of the head sliding area. It is characterized by having been set.

According to the eighth aspect, the height of the inner rail provided on the data recording area side is set so that the flying height is approximately equal to the guaranteed flying height of the data recording area, and the inner rail is provided on the head sliding area side. By setting the height of the outer rail set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area, the head is positioned at the data recording area side at the guaranteed flying height of the data recording area and the head sliding area side. Thus, the head slides on the recording medium while rolling at a height of about the guaranteed flying height of the head sliding area. Therefore, when the floating head is located at the boundary between the data recording area and the head sliding area, the head sliding area side of the floating head is floating to the height guaranteed for the head sliding area. There is no contact with the head sliding area, and the data recording area side of the flying head is flying at about the guaranteed flying height of the data recording area, so data can be recorded in the data recording area with high output. it can. Therefore, data can be recorded up to the boundary between the data recording area and the head sliding area, and the data recording amount can be increased.
At this time, the flying head comes in contact with the head sliding area,
Head damage and medium damage can be prevented. Therefore,
High-capacity, highly reliable information recording / reproducing becomes possible.

According to a ninth aspect of the present invention, the second floating means is configured such that the height of the laminated member laminated on the surface of the outer rail facing the disk-shaped recording medium is approximately equal to the guaranteed flying height of the head sliding area. Is set. According to the ninth aspect, the height of the laminated member laminated on the surface of the outer rail facing the disk-shaped recording medium is set to be approximately equal to the assurance of the flying height of the head sliding area. Since there is no contact with the disk-shaped recording medium, the head can be positioned over the data area and the head sliding area, so that data can be recorded up to the boundary between the data area and the head sliding area. Therefore, the data recording amount can be increased,
Further, at this time, the flying type head comes into contact with the head sliding area, and damage to the head and damage to the medium can be prevented. Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

According to a tenth aspect, the height of the outer rail is set higher than the inner rail. According to the tenth aspect, by setting the height of the outer rail higher than the inner rail, the flying height of the outer rail can be set higher than that of the inner rail. By doing so, the head can be positioned over the data area and the head sliding area, so that data can be recorded up to the boundary between the data area and the head sliding area. Therefore, the data recording amount can be increased,
Further, at this time, the flying type head comes into contact with the head sliding area, and damage to the head and damage to the medium can be prevented. Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

Preferably, the first floating means sets the width of the inner rail so that the floating height of the inner rail is approximately equal to the guaranteed floating height of the data recording area. The floating means is characterized in that the width of the outer rail is set so that the floating height of the outer rail is approximately equal to the guaranteed flying height of the head sliding area.

According to the eleventh aspect, by setting the width of the outer rail to be wider than the width of the inner rail, the flying height of the inner rail is set to be approximately equal to the flying height of the data area. Since it can be positioned over the head sliding area, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium. Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

According to a twelfth aspect, the width of the outer rail is
The width of the inner rail is set wider than the width of the inner rail. According to the twelfth aspect, by setting the width of the outer rail to be wider than the width of the inner rail, the flying height of the inner rail is set to be approximately equal to the flying height of the data area. Therefore, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium. Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

A thirteenth aspect of the present invention includes a data recording area provided on the inner circumference side for recording data, and a head gliding area provided on the outer circumference side of the data recording area and waiting for access to the data recording area. A disk-shaped recording medium having a different guaranteed flying height, an inner rail formed on the inner peripheral side of the disk-shaped recording medium, and an outer rail formed on the outer peripheral side, and the disk-shaped recording medium is formed according to the shapes of the inner rail and the outer rail. An information recording / reproducing apparatus having a floating type head which slides on a recording medium in a direction of rotation of the disc-shaped recording medium and performs recording and reproduction of the data, wherein the floating type head is a component for floating the data recording area. A levitation means for surfacing at about the guaranteed height; and a buoyancy guaranteed height of the head sliding area of the outer rail when slid on the data recording area. And a notch formed at a lower portion so that the outer rail is located at a position higher than a guaranteed flying height of the head sliding area.

According to the thirteenth aspect, the notch is formed in a portion of the outer rail lower than the guaranteed flying height of the head sliding area, so that when the head is positioned at the boundary between the data area and the head sliding area, the outer rail is not moved. Since there is no contact with the head sliding area, the head can be positioned over the data area and the head sliding area,
Therefore, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and at this time, the flying type head comes into contact with the head sliding area, thereby preventing the damage of the head and the medium. Therefore, a large-capacity and highly reliable information recording / reproducing becomes possible.

[0037]

FIG. 1 shows a schematic configuration diagram of a first embodiment of the present invention. The magnetic disk device 100 of the present embodiment
The configuration is such that a zone texture medium 110 is rotatably held by a spindle motor 112 fixed to a base 111. The floating magnetic head 113 is fixed to the tip of an arm 114 held rotatably in the radial direction (arrow B direction) of the zone texture medium 110, and a voice coil motor 115 provided at the other end of the arm 114.
In the radial direction of the zone texture medium 110 (arrow B)
Direction).

The flying type magnetic head 113 causes the zone texture medium 110 to flow through the zone texture medium 110 by the flow of air generated by the rotation of the spindle motor 112.
To access the zone texture medium 110. FIG. 2 is a conceptual diagram of a zone texture medium according to the first embodiment of the present invention. The zone texture medium 110 is a magnetic recording medium. Contrary to the conventional zone texture medium 1, a CSS area 120 is formed on the outer circumference and a data area 121 is formed on the inner circumference. CSS area 120
Has a large number of fine protrusions (textures) formed on the surface, and has a shape in which the flying magnetic head 113 is difficult to be attracted. The data area 121 has a flat surface shape, and has a shape such that the flying magnetic head 113 can easily approach the medium surface.

In the zone texture medium 110,
If the magnetic head 113 is positioned in the CSS area 120 when information is not recorded or reproduced, the flying height of the CSS area 120 is set high.
13 makes it difficult for the zone texture medium 110 to come into contact with the zone texture medium 110.
3 in the data area 121, the data area 12
1 has a low flying height, the flying magnetic head 113
Is in close contact with the zone texture medium 110,
Reproduction becomes possible.

FIG. 3 is a perspective view of the magnetic head according to the first embodiment of the present invention. The magnetic head applied to the flying magnetic head 100 of the present embodiment is an MR (Magneto-Resistiv).
e) head, GMR (Giant Magneto-Resistive) head, and the like. Levitated magnetic head 11 of the present embodiment
Reference numeral 3 denotes a method of forming an MR film, a GMR film, terminals, and the like on a wafer made of Al ₂ O ₃ TiC (altic) by using a thin film forming technique, and then cutting out the ABS (Air Bearing Surface).
It is formed by cutting a surface or the like. The ABS texture 131 of the flying magnetic head 113 of the present embodiment, which faces the zone texture medium 110, has the zone texture medium 1 when facing the zone texture medium 110.
Outer rails 133 are formed on the CSS region 120 side of the ten, that is, on the outer peripheral side, so as to extend in the rotation direction of the zone texture medium 110 (the direction of arrow A).

On the ABS 131, an inner rail 132 is provided on the data area 121 side of the zone texture medium 110, that is, on the inner peripheral side.
Are formed to extend in the rotation direction (direction of arrow A). On the end face of the inner rail 132 on the rotation direction side of the zone texture medium 110, a gap 107 for recording and reproducing information on the zone texture medium 110 is formed.

On both sides of the outer rail 133, a step 13
5 are formed. Steps 134 are formed on both sides of the inner rail 132, similarly to the outer rail 133. The step 135 and the step 134 are formed at the same height position. The air flow between the outer rail 133, the inner rail 132, and the steps 135, 134 is controlled between the zone texture medium 110, and the flying magnetic head 113 flies.

Further, concave portions 136 are formed on both sides of the step portions 135 and 134. The recess 136 controls the flow of air between the ABS 131 and the zone texture medium 110 when the flying magnetic head 113 slides. Also, the inclined surfaces 132a and 133 are provided on the air inflow sides of the outer rail 133 and the inner rail 132, that is, on the side facing the rotation direction of the zone texture medium 110.
a is formed. The inclined surfaces 132a and 133a are inclined so that the distance from the step portions 135 and 134 decreases toward the end surface on the side facing the rotation direction of the zone texture medium 110. The inclined surfaces 132 a and 133 a supply an air flow generated by the rotation of the zone texture medium 110 between the outer rail 133 and the inner rail 132 and the zone texture medium 110.

The flying height of the flying magnetic head 113 from the zone texture medium 110 depends on the height from the step 135 of the outer rail 133 and the step 13 of the inner rail 132.
Determined according to the height from 4. In the flying magnetic head 113 of this embodiment, the step 135 of the outer rail 133 is provided.
Is set higher than the height b from the step 134 of the inner rail 132. Therefore, the floating amount on the outer rail 133 side is higher than the floating amount on the inner rail 132 side. Therefore, the flying magnetic head 113 slides on the zone texture medium 110 with the outer rail 133 side high and the inner rail 132 side low.

FIG. 4 is a view for explaining the overall shape of the flying magnetic head according to the first embodiment of the present invention. FIG.
4A is a perspective view of a 30% slider, and FIG. 4B is a perspective view of a 50% slider. As shown in FIG. 4A, the shape of the slider of the magnetic head 113 has a length L of 1.25 [m].
m], the width W is 1.00 [mm], and the height H is 0.30 [m
m) and a length L of 2.00 [mm] and a width W of 1.60 as shown in FIG. 4B.
[Mm] and a so-called 50% slider having a height H of 0.43 [mm].

In the flying magnetic head 113 of this embodiment, the height b of the outer rail 133 from the step 135 and the height a of the inner rail 132 from the step 134 are guaranteed to float in the CSS area 120 of the zone texture medium 1. Only by setting so as to obtain a roll corresponding to the difference between the height and the guaranteed flying height of the data area 121 of the zone texture medium 110, the 30% slider shown in FIG. 4A and the 50% slider shown in FIG. It can be applied to any of the% sliders.

FIG. 5 is a diagram for explaining the shape of the ABS of the flying magnetic head according to the first embodiment of the present invention. The flying magnetic head 113 according to the present embodiment includes the outer rail 13.
3, and the width of the inner rail 132 is 0.18 [mm]
And the width of the step 135a and the step 134a on the inner peripheral side of the outer rail 133 and the inner rail 132 is set to 0.04 [mm], and the step on the outer peripheral side of the outer rail 133 and the inner rail 132 is set. The width of the portion 135b and the step portion 134b is set to 0.15 [mm].

The height b of the outer rail 133 from the step 135 and the height a of the inner rail 132 from the step 134 are such that the inner rail 132 side guarantees the floating of the data area 121 of the zone texture medium 110 during the run. The surface floats at a level slightly larger than the height, for example, about 5 [nm], and the level on the outer rail 133 side is slightly larger than the guaranteed height of the CSS area 120 of the zone texture medium 110, for example, about 5 [nm] higher. Is set to a value that floats.

Therefore, the flying magnetic head 113 is
It slides in a state of being rolled on the surface of the zone texture medium 110. FIG. 6 is a diagram showing a sliding state of the flying magnetic head according to the first embodiment of the present invention. FIG. 6A is a diagram when the flying magnetic head 113 is viewed from the outer peripheral side to the inner peripheral side of the zone texture medium 110, and FIG.
FIG. 4 is a view when viewed from a direction (direction of arrow A2) opposite to the rotation direction (direction of arrow A1).

As shown in FIGS. 3 and 5, the flying magnetic head 113 of this embodiment has a step 135 of the outer rail 133. As shown in FIG.
6A is set higher than the height b of the inner rail 132 from the step 134, the outer rail 133 side rises from the inner rail 132 side as shown in FIG. Occur. Floating magnetic head 11
3, when the gap 137 approaches the outermost periphery of the data area 121 of the zone texture medium 110, the outer rail 133 side becomes the CSS area 120.
Is set so as to float slightly larger than the guaranteed flying height of the zone texture medium 11 even if the gap 137 is moved to the outermost peripheral side of the data area 121 of the zone texture medium 110.
The flying magnetic head 113 does not come into contact with the CSS area 120 of the zone texture medium 110 because the flying height does not fall below the guaranteed flying height of the CSS area 121.

FIG. 7 is a diagram showing a gliding state at the boundary between the CSS area and the data area of the zone texture medium of the flying magnetic head according to the first embodiment of the present invention. As shown in FIG. 7, when the flying magnetic head 113 slides at the boundary between the CSS area 120 and the data area 121 of the zone texture medium 110, the flying magnetic head 113 moves the CSS of the zone texture medium 110 to the outer rail 133 side.
The guaranteed flying height of the region 120, here, a maximum of 35 [n
m], about 5 [nm] larger, about 40 [nm],
Since the magnetic head 113 flies, the flying magnetic head 113 does not contact the surface of the zone texture medium 110 in the CSS area 120 of the medium.

At this time, the inner rail 132 side is located at a height of the guaranteed flying height of the data area 121 of the zone texture medium 110, in this case, a maximum of 25 [nm].
Since the surface floats by about [nm] or about 30 [nm], information can be recorded and reproduced without the gap 137 being largely separated from the data area 121 of the zone texture medium 110.

As described above, according to the present embodiment, the flying magnetic head 113 is designed so that the flying height of the outer rail 133 is slightly higher than the guaranteed flying height of the CSS area 120 of the zone texture medium 110, and the flying magnetic head 113 The flying height of the inner rail 132 to the zone texture medium 1
10 is rolled so as to be slightly higher than the guaranteed flying height of the data area 121, so that the flying magnetic head 113 is moved to the CSS area 1 of the zone texture medium 110.
Even if you slide at the boundary between the data area 121 and the data area 121,
The floating magnetic head 113 is used for the zone texture medium 110.
Contact and no head crash occurs. Therefore, the floating magnetic head 113 can be moved to the boundary between the CSS area 120 and the data area 121 of the zone texture medium 1 while keeping the gap 137 close to the zone texture medium 110, so that information can be recorded and reproduced. In the state of high output, the recording capacity can be improved.

FIG. 8 is a perspective view of a flying magnetic head according to a second embodiment of the present invention. 3, the same components as those of FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted. In this embodiment, the configuration of the flying magnetic head is different, and the overall configuration of the apparatus and the configuration of the zone texture medium 110 are the same as those in FIGS. In the flying magnetic head 200 of this embodiment, the height b of the outer rail 133 from the step 134 and the height a of the inner rail 132 are the same when cutting the ABS surface of Al ₂ O ₃ TiC (Altic).
After cutting, DLC (Diamond Like
Carbon) is stacked only by the height c and the outer rail 133
Is set to the height (b + c) from the step 134.

According to this embodiment, when cutting the slider, the same process as that of a normal head can be performed. Only the head applied to the zone texture medium 1 is laminated with DLC, and the height of the outer rail 133 is set to b. The DLC may be adjusted according to the difference between the guaranteed flying height of the CSS area 2 of the zone texture medium 110 and the guaranteed flying height of the data area 121.
The versatility can be improved by adjusting the amount of lamination. Further, the outer rail 13 is formed by laminating DLC.
3 can be improved, and when writing data to the outermost peripheral side of the data area 121, the outer rail 122
Even in the case of contact with 20, the head crash can be prevented.

In the first and second embodiments, the height of the outer rail 133 is made higher than the height of the inner rail 132, so that the floating amount of the outer rail 133 is set to be approximately equal to the guaranteed height of the CSS region 2. Although the contact with the CSS region 120 is avoided, the outer rail 133 is made wider than the inner rail 132 so that the flying height of the outer rail 133 is set to be approximately equal to the guaranteed height of the CSS region 120. A configuration to avoid this is also conceivable.

FIG. 9 is a perspective view of a flying magnetic head according to a third embodiment of the present invention. In the figure, the same components as those of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the configuration of the flying magnetic head is different, and the overall configuration of the apparatus and the configuration of the zone texture medium 110 are the same as those in FIGS. In the flying magnetic head 250 of this embodiment, the height b of the outer rail 133 and the height a of the inner rail 132 are equal to each other, and a = b. Of the outer rail 133 and the width W of the inner rail 132
2 Make the outer rail 133 fly higher than CSS
The height is set to be about the flying height of the region 120.

According to the present embodiment, the flying height of the outer rail 133 can be maintained at about the flying height of the CSS area, and the flying height of the inner rail 132 can be about the guaranteed flying height of the data area 3. Even when the flying magnetic head 113 slides at the boundary between the CSS area 120 and the data area 121 of the zone texture medium 110, the flying magnetic head 113 does not contact the zone texture medium 110 and head crash does not occur. Therefore, the flying magnetic head 113 can be moved to the boundary between the CSS area 120 and the data area 121 of the zone texture medium 110 while the gap 137 is kept close to the zone texture medium 110, and information can be recorded and reproduced. In the state of high output, the recording capacity can be improved.

FIG. 10 is a perspective view of a flying magnetic head according to a fourth embodiment of the present invention. In the figure, the same components as those of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment,
The configuration of the flying magnetic head is different, and the overall configuration of the apparatus and the configuration of the zone texture medium 110 are the same as those in FIGS. The flying magnetic head 300 of the present embodiment has the same height a from the step 133 of the outer rail 133 as the height a from the step 134 of the inner rail 132, and is located below when the outer rail 133 slides, that is, air. Cut out the outflow end side of the
Form one.

The length M for shortening the outer rail 133 is
In the sliding state, the lower end of the outer rail 133 is lower than the lower end of the inner rail 132 by CS of the zone texture medium 110.
The height is set to be higher by the difference between the guaranteed flying height of the S area 120 and the guaranteed flying height of the data area 121. FIG.
FIG. 11 is a sectional view of a main part of a flying magnetic head according to a fourth embodiment of the present invention.

Notch 3 of flying head 300 of this embodiment
As shown in FIG. 11, the length x of 01 is such that the ABS surface 131 is in the rotation direction of the zone texture medium 110 (the direction of arrow A).
When the vehicle slides in a posture inclined by an angle θ (θ = 100 μrad) with respect to the lowermost end P 1,
P2 is the difference 10 [nm] between the guaranteed flying height of the CSS area 120 of the zone texture medium 110 and the guaranteed flying height of the data area 121 from the lowermost end P0 of the inner rail 132.
It is set to be at a higher position only.

For example, when the inclination θ is 100 [μrad], the step 13 of the outer rail 133 and the inner rail 132 is
Assuming that the height from 4,135 is 40 [μm], the length x of the notch 301 is 10 nm from sin θ = 10 nm / x.
m / sinθ. FIG. 12 is a diagram showing a sliding state of the flying magnetic head according to the fourth embodiment of the present invention. FIG.
FIG. 2A is a diagram when the floating type head 300 is viewed from the outer peripheral side to the inner peripheral side of the zone texture medium 1, and FIG.
(B) shows the floating type head 300 in the zone texture medium 1.
FIG. 4 is a view when viewed from a direction (direction of arrow A2) opposite to the rotation direction (direction of arrow A1).

The flying head 300 of this embodiment is similar to that of FIG.
Since the height of the outer rail 133 from the step 134 is set to be equal to the height b of the inner rail 132 from the step 135 as shown in FIG. 12B, the outer rail 133 side and the inner rail 132 side as shown in FIG. Are almost equal to each other. However, at this time, the outer rail 13
The outer rail 133 is shortened so that the lower end side of the outer rail 133 is higher than the lower end side of the inner rail 132 by the difference between the guaranteed flying height of the CSS area 120 of the zone texture medium 110 and the guaranteed flying height of the data area 121.
The lower end of the floating head 300 on the outer rail 133 side is always at a higher position than the inner rail 132 side.

FIG. 13 is a diagram showing a gliding state at the boundary between the CSS area and the data area of the zone texture medium of the flying magnetic head according to the third embodiment of the present invention. As shown in FIG. 13, when the flying magnetic head 300 slides at the boundary between the CSS area 2 and the data area 3 of the zone texture medium 1, the flying magnetic head 300
The difference between the guaranteed height of the CSS area 120 of the zone texture medium 110 and the guaranteed height of the data area 121 of the zone texture medium 110, for example, about 10 [nm] in FIG. Since the flying height of the flying head 300 is 25 nm, the CSS area 120 and the data area 1 of the zone texture medium are
21, the floating height of the CSS area 120 of the zone texture medium 110, here 35 [nm] at the maximum, and the outer rail 133 side of the floating magnetic head 300 has the CS of the zone texture medium 110.
Since the position is higher than the guaranteed flying height of the S region 120,
The floating magnetic head 300 is used for the zone texture medium 110.
Never touch.

As described above, according to the present embodiment, the flying type magnetic head 300 is
Even if the flying magnetic head 300 slides at the boundary between the area 120 and the data area 121, the flying magnetic head 300 does not come into contact with the zone texture medium 110 and a head crash does not occur. The CSS area 120 and the data area 12 of the zone texture medium 110 are kept close to the medium 110.
Since information can be recorded and reproduced by moving to the boundary portion with 1, the recording capacity can be improved in a high output state.

[0066]

As described above, according to the first aspect of the present invention, the outer rail is lifted by the first floating means to the height that guarantees the floating of the data recording area, and the inner rail is head-slid by the second floating means. As the flying head is located at the boundary between the data recording area and the head sliding area, the flying head head floats to the head sliding area side of the head sliding area when the flying head is located at the boundary between the data recording area and the head sliding area. As the flying head does not come into contact with the head sliding area, and since the data recording area side of the flying head is flying at about the guaranteed flying height of the data recording area,
Data can be recorded in the data recording area with high output, and thus data can be recorded up to the boundary between the data recording area and the head sliding area, so that the data recording amount can be increased, and It has features such as the fact that the floating type head comes into contact with the sliding area and damage of the head and medium can be prevented.

According to the second aspect, the height of the inner rail provided on the data recording area side is set so that the flying height is approximately equal to the guaranteed flying height of the data recording area, and the inner rail is provided on the head sliding area side. By setting the height of the outer rail set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area, the head is positioned at the data recording area side at the guaranteed flying height of the data recording area and the head sliding area side. As the head slides on the recording medium while rolling at about the guaranteed flying height of the head sliding area, when the flying head is located at the boundary between the data recording area and the head sliding area, the flying head is on the side of the head sliding area. Floats to the flying height of the head sliding area, so that the flying head does not come into contact with the head sliding area. As it floats at the guaranteed flying height of about, it is possible to record data with high output in the data recording area, and therefore, it is possible to record data up to the boundary between the data recording area and the head sliding area, It has features such as being able to increase the data recording amount, and being able to prevent damage to the head and medium due to the contact of the flying head with the head sliding area.

According to the third aspect, the height of the laminated member laminated on the surface of the outer rail facing the disk-shaped recording medium is set so as to be approximately equal to the assurance of the flying height of the head sliding area. Since there is no contact with the disk-shaped recording medium in the sliding area, the head can be positioned over the data area and the head sliding area,
Data can be recorded up to the boundary between the data area and the head sliding area. It has features such as being able to increase the data recording amount, and being able to prevent damage to the head and medium due to the contact of the flying head with the head sliding area.

According to the fourth aspect, by setting the height of the outer rail higher than the inner rail, the flying height of the outer rail can be set higher than that of the inner rail. Since the head can be positioned over the data area and the head sliding area by setting the distance to about the same, data can be recorded up to the boundary between the data area and the head sliding area. Therefore, it is possible to increase the data recording amount, and to prevent the flying head from coming into contact with the head sliding area, thereby preventing damage to the head and the medium.

According to the fifth aspect, the width of the outer rail is
By setting the flying height of the inner rail to about the guaranteed flying height of the data area by setting it wider than the width of the inner rail, the head can be positioned over the data area and the head sliding area. Data can be recorded up to the boundary between the area and the head sliding area, so the amount of data recorded can be increased, and the flying head contacts the head sliding area, preventing head damage and media damage It has features such as being able to.

According to the present invention, when the head is located at the boundary between the data area and the head sliding area, the notch is formed in a portion of the outer rail lower than the guaranteed flying height of the head sliding area. Since there is no contact with the head gliding area, the head can be positioned over the data area and the head gliding area, so that data can be recorded up to the boundary between the data area and the head gliding area, It has features such as being able to increase the data recording amount, and being able to prevent damage to the head and medium due to the contact of the flying head with the head sliding area.

According to the seventh aspect, the first rail means causes the outer rail to float about the guaranteed flying height of the data recording area, and the second flying means causes the inner rail to float about the guaranteed flying height of the head sliding area. Therefore, when the flying type head is located at the boundary between the data recording area and the head sliding area, the head sliding area side of the floating type head flies to the height of the head sliding area, which is the guaranteed flying height. In addition to being able to record data at the same time, data can be recorded up to the boundary of the data recording area with the head sliding area, so that the data recording amount can be increased. It is possible to prevent damage to the head and medium due to contact, and therefore, it has features such as large-capacity and reliable information recording / reproduction.

According to the eighth aspect, the height of the inner rail provided on the data recording area side is set so that the flying height is approximately equal to the guaranteed flying height of the data recording area, and the inner rail is provided on the head sliding area side. By setting the height of the outer rail set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area, the head is positioned at the data recording area side at the guaranteed flying height of the data recording area and the head sliding area side. In this case, the head slides on the recording medium while rolling at a height of about the guaranteed flying height of the head sliding area.Therefore, when the flying head is located at the boundary between the data recording area and the head sliding area, Since the head sliding area can be floated to the height that guarantees the floating of the head sliding area, the flying head does not come into contact with the head sliding area, and the data of the flying head does not change. Since the recording area floats at about the guaranteed flying height of the data recording area, data can be recorded at a high output in the data recording area, and the data can be recorded up to the boundary between the data recording area and the head sliding area. Can be recorded, the data recording amount can be increased, and the floating type head comes into contact with the head gliding area to prevent head damage and medium damage. It has features such as enabling high information recording and reproduction.

According to the ninth aspect, the height of the lamination member laminated on the surface of the outer rail facing the disk-shaped recording medium is set to be approximately equal to the assurance of the flying height of the head sliding area. Since the head does not come into contact with the disk-shaped recording medium in the sliding area, the head can be positioned over the data area and the head sliding area, so that data can be recorded up to the boundary between the data area and the head sliding area. Therefore, the amount of data recorded can be increased, and the flying type head comes into contact with the head gliding area, thereby preventing damage to the head and the medium, and therefore, a large capacity, highly reliable information recording. It has features such as enabling reproduction.

According to the tenth aspect, by setting the height of the outer rail higher than the inner rail, the flying height of the outer rail can be set higher than that of the inner rail. By setting the length to about the same, the head can be positioned over the data area and the head sliding area, so that data can be recorded up to the boundary between the data area and the head sliding area. And the flying type head comes in contact with the head sliding area, preventing damage to the head and the medium.
Therefore, it has features such as high-capacity and highly reliable information recording and reproduction.

According to the eleventh aspect, by setting the width of the outer rail to be wider than the width of the inner rail, the flying height of the inner rail is set to be approximately equal to the flying height of the data area. Since it can be positioned over the head sliding area, data can be recorded up to the boundary between the data area and the head sliding area, so that the data recording amount can be increased and the floating type can be placed in the head sliding area. The head touches,
It is possible to prevent damage to the head and the medium, and therefore, it has features such as a large-capacity and highly reliable information recording / reproduction.

According to the twelfth aspect, by setting the width of the outer rail to be wider than the width of the inner rail, the flying height of the inner rail is set to be approximately equal to the flying height of the data area. Since it can be positioned over the head sliding area, data can be recorded up to the boundary between the data area and the head sliding area, so that the data recording amount can be increased and the floating type can be placed in the head sliding area. The head touches,
It is possible to prevent damage to the head and the medium, and therefore, it has features such as a large-capacity and highly reliable information recording / reproduction.

According to the thirteenth aspect, when the head is positioned at the boundary between the data area and the head sliding area, the notch is formed in a portion of the outer rail lower than the guaranteed flying height of the head sliding area. Since there is no contact with the head sliding area, the head can be positioned over the data area and the head sliding area,
Therefore, since data can be recorded up to the boundary between the data area and the head sliding area, the data recording amount can be increased, and at the same time, the flying head comes into contact with the head sliding area, which may damage the head or damage the medium. It has features that damage can be prevented, and therefore large-capacity and highly reliable information recording and reproduction can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a perspective view of a zone texture medium according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a flying magnetic head according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining the overall shape of the flying magnetic head according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of the flying magnetic head according to the first embodiment of the present invention;
It is a figure for explaining shape of S side.

FIG. 6 is a diagram showing a sliding state of the flying magnetic head according to the first embodiment of the present invention.

FIG. 7 is a diagram showing a gliding state at the boundary between the CSS area and the data area of the zone texture medium of the flying magnetic head according to the first embodiment of the present invention.

FIG. 8 is a perspective view of a flying magnetic head according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a flying magnetic head according to a third embodiment of the present invention.

FIG. 10 is a perspective view of a flying magnetic head according to a fourth embodiment of the present invention.

FIG. 11 is a sectional view of a main part of a flying magnetic head according to a fourth embodiment of the present invention.

FIG. 12 is a diagram showing a sliding state of a flying magnetic head according to a fourth embodiment of the present invention.

FIG. 13 is a diagram showing a gliding state at a boundary between a CSS area and a data area of a zone texture medium of a flying magnetic head according to a fourth embodiment of the present invention.

FIG. 14 is a conceptual diagram of an example of a conventional zone texture medium.

FIG. 15 is a schematic configuration diagram of an example of a magnetic disk drive on which a conventional zone texture medium is mounted.

FIG. 16 is a perspective view of an example of a conventional floating head.

FIG. 17 is a diagram showing a sliding state of an example of a conventional floating head.

[Explanation of symbols]

 Reference Signs List 1 zone texture medium 2 CSS area 3 data area 10 magnetic disk device 11 base 12 spindle motor 13 magnetic head 14 arm 15 voice coil motor 103, 200, 300 floating head 131 ABS surface 132 inner rail 133 outer rail 134, 135 step section 136 Recess 137 gap

Claims (13)

[Claims] 1. A flying height assurance height between a data recording area provided on an inner peripheral side for recording data and a head sliding area provided on an outer peripheral side of the data recording area and waiting for access to the data recording area. Are provided so as to face different disk-shaped recording media, an inner rail is formed on the inner peripheral side of the disk-shaped recording medium, and an outer rail is formed on the outer peripheral side. In a flying head that slides on a disk-shaped recording medium and performs recording and reproduction of the data, the flying height formed on the inner rail and the flying height on the data recording area side is approximately equal to the guaranteed flying height of the data recording area. Levitation means formed on the outer rail, and slid so that the levitation height on the side of the head slidable area is approximately equal to the assured height of levitation in the head slidable area. Type head, characterized in that it comprises a second floating unit. 2. The method according to claim 1, wherein the first levitation means determines a height of a surface of the inner rail facing the disc-shaped recording medium such that a levitation height of the inner rail is approximately equal to a guaranteed levitation height of the data recording area. The height of the surface of the outer rail facing the disk-shaped recording medium is set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area. The flying head according to claim 1, wherein: 3. The second levitation means sets a height of a laminated member laminated on a surface of the outer rail facing the disk-shaped recording medium so as to be approximately equal to a guaranteed flying height of the head sliding area. The flying head according to claim 1 or 2, wherein: 4. An inner rail which is a step formed at one end of the air bearing surface and which is arranged on the inner side of the disk,
In a flying head having at least a step formed at the other end of the floating surface and an outer rail disposed on the outer side of the disk, the height of the outer rail is set higher than the height of the inner rail. A floating head characterized by the following. 5. An inner rail which is a step formed at one end of the air bearing surface and which is arranged on the inner side of the disk,
In a floating head having at least a step formed at the other end of the floating surface and an outer rail disposed on the outer side of the disk, the width of the outer rail is set wider than the width of the inner rail. A floating head characterized by the following. 6. A flying height assurance height between a data recording area provided on the inner circumference side for recording data and a head gliding area provided on the outer circumference side of the data recording area and waiting for access to the data recording area. Are provided so as to face different disc-shaped recording media, an inner rail is formed on the inner peripheral side of the disc-shaped recording medium, and an outer rail is formed on the outer peripheral side. The outer rail is formed according to the shapes of the inner rail and the outer rail. A flying head that slides on a disc-shaped recording medium while tilting in the rotation direction of the disc-shaped recording medium and performs recording and reproduction of the data, The outer rail is formed on a portion of the outer rail lower than the guaranteed flying height of the head sliding region when sliding on the data recording area, and the outer rail is formed on the front rail. Flying head characterized by having a notch formed so as to be higher than the position flying guarantees the height of the head planing areas. 7. A recording medium having different flying heights between a data recording area for recording data and a head gliding area waiting for access to the data recording area, and an inner rail on an inner peripheral side of the disc-shaped recording medium. And an outer rail is formed on the outer peripheral side. In the above, the floating type head is provided on the inner rail, and first floating means for floating and sliding the inner rail at a guaranteed floating height of the data recording area is provided on the outer rail, and the outer rail is provided with: An information recording / reproducing apparatus, comprising: a second levitation means for surfacing and gliding at the levitation height of the head gliding area. 8. The first levitation means determines a height of a surface of the inner rail facing the disk-shaped recording medium such that a levitation height of the inner rail is approximately equal to a guaranteed levitation height of the data recording area. The height of the surface of the outer rail facing the disk-shaped recording medium is set so that the flying height is approximately equal to the guaranteed flying height of the head sliding area. The information recording / reproducing apparatus according to claim 7, wherein: 9. The second levitation means sets a height of a laminated member laminated on a surface of the outer rail facing the disk-shaped recording medium so as to be approximately equal to a guaranteed levitation height of the head sliding area. 9. The information recording / reproducing apparatus according to claim 7, wherein: 10. The height of the outer rail is set higher than the inner rail.
10. The information recording / reproducing device according to any one of claims 9 to 9. 11. The first flying means sets the width of the inner rail so that the flying height of the inner rail is approximately equal to the guaranteed flying height of the data recording area. 11. The information recording / reproducing apparatus according to claim 10, wherein the width of the outer rail is set so that the flying height of the outer rail is approximately equal to the guaranteed flying height of the head sliding area. 12. The information recording / reproducing apparatus according to claim 11, wherein a width of the outer rail is set wider than a width of the inner rail. 13. A flying assurance height between a data recording area provided on the inner circumference side for recording data and a head sliding area provided on the outer circumference side of the data recording area and waiting for access to the data recording area. Disc-shaped recording media having different diameters, an inner rail is formed on the inner peripheral side of the disc-shaped recording medium, and an outer rail is formed on the outer peripheral side. An information recording / reproducing apparatus having a floating type head that slides in a direction of rotation of the disc-shaped recording medium and performs recording and reproduction of the data, wherein the floating type head has a guaranteed flying height of the data recording area. A levitation means for surfacing by a degree; a portion formed on the outer rail, which is lower than a guaranteed flying height of the head sliding area of the outer rail when sliding on the data recording area. Is formed, the information recording and reproducing apparatus, characterized in that the outer rail has a the head higher than the flying guarantee the height of the gliding area position become so formed notch.