JP2001084725A - Slider of disk-recording/reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slider which can prevent contacting between a disk and a slider ABS and suppress wears, even if a float amount is minimized. SOLUTION: The slider has an inflow end 21 and an outflow end 22 positioned on the upstream side and the downstream side of an air flow generated between the slider and a recording medium. Moreover, the slider of the disk-recording/reproducing apparatus has a float facing opposite to the recording medium, and the slider has members 31, 32 and 33 for collecting the air flow which running from the inflow end 21 toward the outflow end 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a slider used for a storage device such as a hard disk device.

[0002]

2. Description of the Related Art Conventionally, a hard disk drive (hereinafter referred to as "HD
D ") includes a head for recording and reproducing data on both sides of a disk as a recording medium. HD
In D, the head is mounted on a support made of a ceramic material or the like called a slider, and is supported in a state of flying above the data recording surface of the disk at a predetermined interval.

[0003] The HDD includes one or several disks. The disks are stacked on the main shaft at a distance so that they do not touch each other.

[0004] The surface of each disk is apparently identical. However, in practice, each surface is divided into pad sections called tracks, in which data is stored. These tracks are arranged as concentric circles. Disks are made of various materials such as metal, resin, glass and the like. On resin disks such as those used for CDs, lasers store and retrieve data. On metal disks, data is stored and retrieved by electromagnets commonly known as transformers.

In order to store data on a magnetic disk, the surface of the disk is magnetized using a small ceramic block generally called a slider. The slider incorporates a magnetic transducer, which is a so-called write head. More specifically, the slider containing the write head floats at a height of several hundred NM to several tens of NM from the disk surface, and the head is excited into several states, and the tracks located thereunder correspond to data. Magnetize so that

In order to retrieve data stored on a magnetic disk, a slider containing a read head is floated on the disk. At this time, a current is induced in the read head by the magnetized portion on the track. By analyzing the current output from the read head, the computer system can reproduce and use the data stored on the magnetic disk. Some h
DD uses a transducer that performs both read and write operations. Recently, a magnetoresistive element or an inductance element has been used as a read head.

[0007] Like a record, both sides of the disc are usually used to store data or other information necessary for operation of the HDD. Because the disks are stacked and spaced apart from each other, each stacked disk has its own read / write head on both the front and back surfaces. This is as if a stereo with record hands on each side could play both sides of the record at the same time.

There are two types of HDDs having a rotary actuator and a linear actuator. The rotary actuator has an actuator arm similar to the tone arm of a record player. Like a tone arm, its actuator arm rotates so that a slider containing a read / write head can move to positions above various tracks on the disk.

Thus, the read / write head is:
It can be used to magnetize tracks on the surface of a disk to a pattern corresponding to data, or to detect a magnetized pattern on a track. For example, if the required data is stored on two different tracks of a disk, the actuator arm may move from one track to the other to read what is magnetically representative of the data. Rotate to. The present invention relates to a rotary actuator HDD.

[0010] Linear actuators also have a similar actuator arm, but the movement of position is performed by linear movement rather than rotation.

[0011] The actuator arm of the HDD has a slider attached to the tip thereof, and has a built-in read / write head therein. A pad is fixed to the slider. As the disk rotates, air is drawn between the pad and the disk surface, thereby applying pressure to keep the head away from the disk. The head then floats on the rotating disk as described above. The flying height is the thickness of the air lubrication film, that is, the distance between the disk surface and the head.

Thus, the pad forms an air bearing surface (ABS) and forms and maintains a self-pressurizing air lubrication film between the head and the disk storage surface. This film eliminates friction and wear that occurs when the head and the disk come into mechanical contact during disk rotation.

[0013] Conventional ABS designs basically consist of two tapered pads known as tapered flat sliders. The two-pad tapered flat configuration typically has two or more flat pads, each with a tapered tip. The pads are extended with a tapered tip oriented in the direction of rotation of the disk surface.

Such a design works well in a linear actuator HDD because the air between the disk and the slider basically flows in one direction along the length of the pad. Stated another way, such a design requires that the slider be positioned relative to the disk such that viscously drawn air under the slider flows from the front of the slider to the rear along a longitudinal axis parallel to the pad. Can be said to work well.

The concept of tapered flat design dates back to the days of relatively slow access speed, large diameter files using linear actuators.

Today's HDDs are significantly different from large diameter HDDs using linear actuators.
Current files are very small and data access is fast. Currently, HDDs are 5.25 ",
It processes 3.50 ", 2.50", and 1.80 "diameter disks and has a rotary actuator for fast access speed.

Due mainly to the use of rotary actuators, the airflow under the slider is no longer essentially unidirectional, but spreads at various angles with respect to the longitudinal axis of the slider. In addition, the high-speed search operation of the actuator being accessed causes the flow between the head and the disk to be tilted.

Therefore, the recent rotary actuator H
In DD, the airflow is no longer considered to move from the front of the slider to the rear or slightly deviate from it.

The angle of the airflow relative to the vertical axis of the slider is called the skew angle. The tilt angle is positive when the actuator arm is positioned so that airflow hits the outer edge or outside of the slider. Actuator so that it touches the inner end of the slider or the hub
When the arm is located, the skew angle is negative.

The tapered flat design has extreme floating altitudes at high positive or negative skew angles and high access speeds because the slider is designed for linear actuators rather than rotary actuators. Drop is easy to occur.

Also, due to the twisting of the airflow, the flying height is not constant under all pads due to the rotation of the slider.

Rotating the slider is analogous to tilting the airframe as the airplane changes direction. In other words, one wing is lifted and the other is lowered. HDD
In, a positive rotation occurs when the outer pad moves away from the disk surface, and a negative rotation occurs when the outer pad approaches the disk surface.

In the HDD, the flying height of the slider is an important parameter that needs to be controlled. As the floating altitude increases, the signal amplitude decreases and the signal-to-noise ratio decreases, thus increasing the error rate.

When the flying height decreases, the possibility that the head comes into contact with the disk surface increases, and if it does, the wear of both the head and the disk surface progresses, and the reliability decreases. Become. Extreme contact with the disk surface that could cause a failure is called a crash, and the data becomes unplayable.

Controlling the rotation of the slider is also important.
When the end portion of the slider is lowered by rotation, the possibility that the head comes into contact with the disk surface increases. When rotation occurs to lift one end of the slider, the distance of the read / write head from the disk surface increases,
As the floating altitude becomes higher, it causes a data error as well as a data error. The adverse effects of such rotation are exacerbated when the read / write head is mounted on its raised end.

A conventional technique is disclosed in Japanese Patent Application Laid-Open No. 8-255331. In Japanese Patent Application Laid-Open No. 8-255331, the rear end of the tapered portion of the pad is configured so as to be located at a position where the pad width is reduced, so that the processing tolerance hardly affects the flying characteristics.

[0027]

However, as the recording density of HDDs has increased in recent years, the flying height has been minimized, and the speed of change (seek speed) of the skew angle has been increased. In the conventional configuration disclosed in Japanese Patent Application Laid-Open No. 8-255331, there is a problem that a change in the flying height is large with an increase in the seek speed, and there is a possibility that wear due to contact between the slider and the disk may occur.

It is an object of the present invention to provide a slider having an air bearing surface with a small flying height variation even when the flying height is minimized.

It is another object of the present invention to provide a slider which can prevent the disk from coming into contact with the ABS of the slider even when the flying height is minimized, thereby suppressing wear.

Still another object of the present invention is to provide a slider capable of minimizing a flying height.

Still another object of the present invention is to provide a slider in which the slider stops when the disk stops and the suction force generated at the start of the disk and during the operation of stopping the disk can be suppressed.

[0032]

SUMMARY OF THE INVENTION A slider of a disk recording / reproducing apparatus according to the present invention has an inflow end and an outflow end located upstream and downstream of an air flow generated between the disk and a recording medium. A slider of a disk recording / reproducing apparatus having an air bearing surface facing a medium, comprising a member for collecting the air flow from the inflow end to the outflow end, thereby achieving the above object.

[0033] The member may include a groove.

The member is a first member provided on the air bearing surface.
May be included.

The member may include a second protrusion having a second height provided on the first protrusion.

The disk recording / reproducing method according to the present invention has an inflow end and an outflow end located upstream and downstream of an airflow generated between the disk and the recording medium, and has a floating surface facing the recording medium. And a recording / reproducing method for recording / reproducing using a slider of a disk recording / reproducing apparatus having a member for collecting the air flow or the lubricant flowing from the inflow end to the outflow end, wherein the slider The recording / reproduction is performed while being in contact with the agent, thereby achieving the above object.

[0037] The member may include a groove.

The member includes a first member provided on the air bearing surface.
May be included.

The member may include a second protrusion having a second height provided on the first protrusion. According to one aspect of the present invention, even when the flying height of the slider is low, a constant amount of pressure generated on the lower surface of the slider can be secured, and the flying height can be stably maintained.

According to another aspect of the present invention, the flying height of the slider can be kept low, and the fluctuation of the flying height due to the fluctuation of the peripheral pressure is small.

According to still another aspect of the present invention, even when the flying height of the slider is low, a constant amount of pressure generated on the lower surface of the slider can be secured, and the flying height can be stably maintained. . Further, the suction force at the time of stopping the disk can be suppressed.

[0042]

Embodiments of the present invention will be described below.

(Embodiment 1) FIG. 1 is a perspective view of the inside of an HDD 100. FIG. 2 is a sectional view of the HDD 100. The HDD 100 has a housing cover (not shown).
Covered by A suspension 14 is attached to the tip of each of the actuator arm sets 5 rotatably attached to the actuator shaft 20. At the tip of each suspension 14 is mounted a slider 3 which carries a magnetic transducer or a read / write head 99 (not shown in FIGS. 1 and 2).

The main shaft 1 is mounted in the housing 7. A large number of disks 2 are rotatably mounted on the main shaft 1 at intervals. Disk 2 is a motor 8
The main shaft 1 rotates in the direction indicated by the arrow A together with the main shaft 1. Information is written on or read from disk 2 by a head 99 (not shown) located in slider 3 and positioned by actuator arm set 5.

Sliders 3 are provided on both the front and back surfaces of the disks 2, and information is written on or read from the front and back surfaces of each disk 2. Power is supplied to the actuator set 5 by the voice coil motor 6 and the actuator arm 5
Swings around the actuator shaft 20.

The slider 3 and a magnetic transducer (not shown) integrated therewith move over the surface of the disk 2 so that a magnetic representation of the data can be stored on any track on the disk 2. In the HDD 100, the movement of this transducer is due to rotation about the actuator axis 20. By rotating the actuator / actuator arm 5, the slider 3 and the transducer therein can be positioned on any track on the surface of the disk 2.

FIG. 3 is a detailed view of one of the disks 2 as viewed from above. As is well known in the HDD technology, each disk has a row of concentric tracks on which magnetic information is recorded. Inner diameter (ID) 11
Is the innermost concentric track where data is stored. Outer diameter (OD) 10 is the outermost concentric track where data is stored.

FIG. 4A shows the slider 3 according to the first embodiment.
Of the surface of the air bearing (hereinafter referred to as “ABS”). The ABS is formed on the lower surface of the slider 3 and faces the disk surface. The ABS shape is formed by molding, etching, laser cutting, ion pulverizing, general-purpose machining, or various other methods.

The slider 3 has an inflow end 21 and an outflow end 2
2. There are an inner peripheral end 23 and an outer peripheral end 24. As shown in FIG. 4A, the slider 3 is provided with an inner pad 31, an outer pad 32, and an outflow end pad 33.

Further, an inflow end recess 41 whose height is one step lower than the inner pad 31 and the outer pad 32 is provided, and a lower center recess 43 is further provided. The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and a lower inflow end recess 41 is located on the inflow end 21 side of the inner pad 31 and the outer pad 32.

The inflow end 21 faces the direction in which the disk surface rotates. Due to the viscous effect, the rotating disk 2 passes the air under the inflow end recess 41 and pushes it into the inner pad 31 and the outer pad 32, thereby creating pressure in the disk direction below each pad, As a result, an air lubrication film is formed. Disk 2 of slider 3
The pressure acting in the direction is called positive pressure, and the pressure acting above the slider 3 is called negative pressure.

The central recess 43 is formed at a sufficient depth so that lift is not generated by the air lubrication film effect. The recording transducer or read / write head 99 is
Usually, it is located at the rear end of the outflow end pad 33.

The inflow end recess 41 is formed with a predetermined depth so as to generate a slight lift. In the present embodiment, the inflow end recess 41 has a depth of 0.2 μm, and the center recess 43 has a depth of 1 μm.

FIG. 4A also shows the vertical axis 60.
The angle of the airflow with respect to the longitudinal axis 60 of the slider 3 is called a skew angle, and depends on the mounting position of the actuator arm 5 on the rotary actuator shaft 20.

The skew angle greatly changes between ID and OD. Also, the skew angle can be either positive or negative.
As shown by arrow E, the air flow is
If the actuator arm 5 is located as shown at 4, the skew angle is said to be positive. When the actuator arm 5 is positioned so that the airflow hits the inner end 23 of the slider 3 as shown by the arrow F, the skew angle is said to be negative.

In the first embodiment, the rotary actuator / actuator arm 5 is installed such that the skew becomes a positive maximum angle at the OD and the negative minimum angle at the ID. Actuator arm 5
Due to the rotation, the inflow direction of the air is different, and the inflow speed is not constant under all the pads.

In the first embodiment, the rotation speed of the disk 2 is constant, the disk speed below the slider is different, and the air flow speed is different due to the disk radius fluctuation of ID and OD. The ID is the lowest speed, and the OD is the highest speed.

At the inner pad 31, the outer pad 32, and the outflow end pad 33, a positive pressure is generated below the slider by the air lubricating film. Also, the ridge lines 81, 82,
At 83, 84 and 85, a negative pressure is generated. Slider 3
Is balanced by the positive pressure generated by the air lubricating film, the negative pressure generated by the air lubricating film, generated by the inner pad 31, the outer pad 32, the outflow end pad 33, the inflow end recess 41, etc., and the pressing force of the suspension 14. Floated and held.

On the air inflow side of the outflow end pad 33, a groove 76 is provided. The groove 76 is formed in a U shape. The air that has flowed in from the air inflow side ridge line 73 below the outflow end pad 33 flows through the groove 76 to the central shaft 6.
Flowing toward zero, the air flow on the central axis 60 is relatively increased.

The air that has flowed into the central shaft 60 further collides with the wall surface of the groove-shaped front end of the closed square, and flows into the disk 2 to generate pressure. Further, it flows below the head 99 to increase the pressure below the head 99.

Therefore, the pressure below the head 99 is
Since it is possible to maintain a high pressure even when the flying height is low, it is possible to stably maintain a constant flying height, as well as to keep the disk 2 and the slider 3 high. Can also be prevented from contacting the ABS.

In the first embodiment, the depth of the groove 76 is
0.06 microns. The width of the groove 76 is 20 microns. The interval between the grooves 76 is 30 microns.

In the first embodiment, the disk stops,
When the slider stops on the disk, the slider 3 is provided with the groove 76, so that the groove 76 does not contact the disk, so that the contact area can be reduced. For this reason, the attraction force due to the contact between the disk and the slider can be reduced.

Further, when the lubricant provided on the disk surface adheres to the slider when the disk 2 stops and the slider 3 stops on the disk 2 in the first embodiment,
Since the slider 3 is provided with the groove 76, excess lubricant flows into the groove 76, and an appropriate lubricating action can be maintained between the disk and the slider.

The groove pattern of the groove 76 shown in FIG. 4A is merely an example, and any groove pattern can be adopted as long as the air flow from the inflow end to the outflow end is collected. For example, the groove pattern shown in the groove 76A or the groove 76B shown in FIGS. 4B and 4C may be adopted.

FIG. 6 shows the relationship between the thickness of the lubricant and the attraction force. The dashed line indicates the case where there is no groove, and the solid line indicates the attraction force when there is a groove. It can be seen that when there is a groove, the suction force can be kept low irrespective of the thickness of the lubricant, as compared with the case without the groove.

(Embodiment 2) FIG. 7 is a diagram schematically showing the state of recording and reproduction of a slider according to Embodiment 2 of the present invention. FIG. 8 shows an example of the ABS shape of the slider according to the second embodiment. The reference numerals are the same as those in the first embodiment, and only different parts from the first embodiment will be described.

The slider 3A has an inflow end 21 and an outflow end 2
2. There are an inner peripheral end 23 and an outer peripheral end 24. As shown in FIG. 8, the slider 3A has an inner pad 31, an outer pad 3
2. An outflow end pad 33 is provided.

Further, an inflow end recess 41 whose height is one step lower than the inner pad 31 and the outer pad 32 is provided, and a center recess 43 whose height is further lower is provided. The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and a lower inflow end recess 41 is located on the inflow end 21 side of the inner pad 31 and the outer pad 32.

The inflow end 21 faces the direction in which the disk surface rotates. Due to the viscous effect, the rotating disk 2 passes the air under the inflow end recess 41 and pushes it into the inner pad 31 and the outer pad 32, thereby creating pressure in the disk direction below each pad, As a result, an air lubrication film is formed. Disk 2 of slider 3
The pressure acting in the direction is called positive pressure, and the pressure acting above the slider 3 is called negative pressure.

On the surface of the disk 2, a magnetic layer 58 is formed, on which a protective film 59 and a lubricating film 60 are formed.

The rotating film 60 on the surface of the rotating disk 2 rotates at a high speed while being in contact with the outflow end pad 33.
Pressure is generated between the lubricant film 60 and the slider 3 due to the viscosity effect of the lubricant. As a result, the lubricant slider floats in the lubricant.

The central recess 43 is formed at a sufficient depth so that lift is not generated by the air lubricating film effect. The recording transducer or read / write head 99 is
Usually, it is located at the rear end of the outflow end pad 33.

The inflow end recess 41 is formed with a predetermined depth so that a slight lift is generated by the air lubrication film effect. In the second embodiment, the inflow end recess 41 is 0.2 μm.
m and the central recess 43 is 1 μm deep.

At the inner pad 31 and the outer pad 32, a positive pressure is generated below the slider by the air lubricating film. Further, a negative pressure is generated at the ridge lines 81, 82, 83, 84, 85 of the inflow end recess 41.

In the outflow end pad 33, the slider 3 has a floating force due to the viscous effect of the lubricant.
1, the outer pad 32, the positive pressure of the air lubricating film generated at the inflow end recess 41, and the like, the lubricant floating force generated at the outflow end pad 33, and the pressing force of the suspension 14, balance the disk 2 to a predetermined amount. Is held.

In the first embodiment, the slider 3 is levitated from the disk by the airflow, but in the second embodiment,
While the slider 3A moves in the direction indicated by G, the pad on the inflow side floats, while the pad 33 on the outflow end side is in contact with the lubricant provided on the disk surface.

As shown in FIG. 8, the pad 33 on the outflow end side
Are formed sufficiently smaller than in the first embodiment. In the second embodiment, the width of the pad 33 at the outflow end is 20 μm and the length is 3 μm with respect to the slider width of 1 mm.
0 microns.

By setting the pad 33 on the outflow end side to be sufficiently small in this way, the slider 3A floats in the lubricant due to the liquid floating force of the lubricant generated by contact with the lubricant.

At this time, the protective film and the magnetic layer are formed under the lubricant, but the lubricant is hard to come into contact with the protective film and the magnetic layer and the slider. Since the floating force of the lubricant is used, fluctuations in the floating amount due to the surrounding pressure environment are unlikely to occur.

FIG. 9 shows the distance between the magnetic layer and the head of the slider when the peripheral pressure is reduced. The dashed-dotted line indicates the case where the pad 33 is separated from the lubricant of the disk and is floating by air lubrication, and the solid line is in contact with the lubricant and floats in the lubricant by viscous force of the lubricant according to the second embodiment. If it is.

According to the second embodiment, even if the pressure changes, the change in the flying height is suppressed. This is because air lubrication is affected by the atmospheric pressure, but the floating pressure by the lubricant is hardly affected by the atmospheric pressure.

The thickness of the lubricant used in FIG. 9 is 6 nm in the case of air lubrication, and is 8 nm in the case of viscous use by the lubricant. As shown in FIG. 9, the distance between the magnetic layer and the head can be reduced without considering the effect of pressure, as compared with the case where an air lubricating film is used.

The ABS shape of the slider according to the second embodiment is not limited to this, but may be a shape as shown in FIGS. FIG. 10 is a view showing the shape of the surface of another slider 3C according to the second embodiment. The outflow end pad 33 has a groove formed therein.

FIG. 11 is an enlarged view of the outflow end pad.
By forming the groove in this manner, the lubricant flows along the groove, and a high lubricant pressure acts on the center axis of the groove. The slider easily floats in the lubricant by the pressure of the lubricant.

(Third Embodiment) FIG. 12A shows the ABS shape of a slider 3D according to a third embodiment. The ABS is formed on the lower surface of the slider 3D and faces the disk surface. The ABS shape is formed by molding, etching, laser cutting, ion pulverizing, general-purpose machining, or various other methods. Embodiment 1
The description of the portions common to the second embodiment is omitted.

The slider 3 has an inflow end 21 and an outflow end 2
2. There are an inner peripheral end 23 and an outer peripheral end 24. FIG. 12 (a)
As shown in (1), the slider 3 is provided with an inner pad 31, an outer pad 32, and an outflow end pad 33. An inflow end recess 41 having a lower height from the inner pad 31 and the outer pad 32 is provided, and a lower center recess 43 is provided.
Is provided.

The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and a lower inflow end recess 41 is located on the inflow end 21 side of the inner pad 31 and the outer pad 32. The inflow end 21 faces the direction in which the disk surface rotates.

The rotating disk 2 passes the air under the inflow end recess 41 due to the viscous effect, and the inner pad 3
1 and the outer pad 32, thereby creating a pressure in the disk direction below each pad, thereby forming an air lubricating film. The pressure acting on the slider 3 in the direction of the disk 2 is called positive pressure, and the pressure acting on the slider 3 above is called negative pressure.

The central recess 43 is formed at a sufficient depth so that lift is not generated by the air lubrication film effect. The recording transducer or read / write head 99 is
Usually, it is located at the rear end of the outflow end pad 33.

The inflow end recess 41 is formed with a predetermined depth so as to generate a slight lift. In the third embodiment, the inflow end recess 41 has a depth of 0.2 μm, and the center recess 43 has a depth of 1 μm.

In the inner pad 31, the outer pad 32, and the outflow end pad 33, a positive pressure is generated below the slider by the air lubricating film. Also, the ridge lines 81, 82,
At 83, 84 and 85, a negative pressure is generated.

The slider 3 has an inner pad 31, an outer pad 3
2, balanced by the positive pressure of the air lubricating film generated at the outflow end pad 33 and the inflow end recess 41, the negative pressure of the air lubricating film, and the pressing force of the suspension 14, and floated above the disc 2 by a predetermined amount.

A protrusion 92 is provided on the air inflow side of the outflow end pad 33. The protrusion 92 is provided at the outflow end pad 33.
From the disk direction. Protrusion 9
2 is formed by DLC sputtering or the like.

In this embodiment, the amount of protrusion is 30 nm from the surface of the outflow end pad. The air that has flowed in from below the outflow end pad 33 from the air inflow side ridge line 73 side is
Thus, the air flows toward the central axis 60 and the air flow rate on the central axis 60 is relatively increased.

The air that has flowed into the central shaft 60 further collides with the wall surface of the protruding portion 92 at the tip of the closed square, and flows into the disk 2 to generate pressure. Therefore, the pressure below the head 99 can be maintained higher than when there is no groove, and a high pressure can be maintained even when the flying height is low, so that a constant flying height can be stably maintained. In addition, contact between the disk 2 and the ABS of the slider 3 can be prevented.

In the third embodiment, the disk stops,
When the slider stops on the disk, the slider 3 is provided with the projection 92.
Only the ridge line 72 contacts the disk, and the contact area between the slider and the disk can be reduced. For this reason, the attraction force due to the contact between the disk and the slider can be reduced.

Further, when the disk 2 stops in the third embodiment and the slider 3 stops on the disk 2, the lubricant provided on the disk surface adheres only to the projections 92,
The lubricant hardly adheres to the entire surface of the outflow end pad 33 of the slider 3.

The pattern of the protrusion 92 shown in FIG. 12A is merely an example, and any pattern can be adopted as long as the air flow from the inflow end to the outflow end is collected. For example, a pattern shown by the protrusion 92A shown in FIG. As shown in FIG. 12B, there may be a plurality of protrusions.

[0100]

As described above, according to the present invention, there is an excellent effect that wear due to contact between the slider and the disk can be suppressed.

Further, according to the present invention, there is an excellent effect that the slider is stopped when the disk is stopped, and the suction force generated at the start of the disk and during the disk stop operation can be suppressed.

Further, according to the present invention, there is an excellent effect that a slider capable of minimizing the flying height can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an HDD.

FIG. 2 is a sectional view of an HDD.

FIG. 3 is a detailed view of one of the disks 2 as viewed from above.

FIG. 4 is a diagram showing a shape of an air bearing surface (ABS) of the slider 3 according to the first embodiment.

FIG. 5 is a cross-sectional view of the slider 3 according to the first embodiment.

FIG. 6 is a graph showing a relationship between a lubricant film thickness and an attraction force according to the first embodiment.

FIG. 7 is a diagram schematically showing a state of the slider according to the second embodiment during recording and reproduction.

FIG. 8 is a diagram showing AB of a slider according to a second embodiment of the present invention;
The figure which shows S shape.

FIG. 9 is a graph showing a relationship between a surrounding pressure environment and a flying height according to the second embodiment.

FIG. 10 is a diagram showing an ABS shape of another slider according to the second embodiment.

FIG. 11 is an enlarged view of an outflow end pad of another slider according to the second embodiment.

FIG. 12 is a diagram showing an ABS shape of a slider according to the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main shaft 2 Disk 3 Slider 5 Actuator arm set 6 Voice coil motor 7 Housing 8 Motor 14 Suspension 20 Actuator shaft 99 Head 11 Inner diameter (ID) 10 Outer diameter (OD) 21 Inflow end 22 Outflow end 23 Inner circumference end 24 Outer end 31 Inner pad 32 Outer pad 33 Outflow end pad 41 Inflow end recess 43 Center recess 59 Protective film 60 Lubricating film 92 Projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kaoru Matsuoka 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Inside the corporation

Claims (8)

[Claims] 1. A slider of a disk recording / reproducing apparatus having an inflow end and an outflow end located upstream and downstream of an air flow generated between the recording medium and a floating surface facing the recording medium. A slider for a disk recording / reproducing apparatus, comprising: a member for collecting the air flow from the inflow end to the outflow end. 2. The slider according to claim 1, wherein the member includes a groove. 3. The slider according to claim 1, wherein the member includes a first protrusion having a first height provided on the floating surface. 4. The slider according to claim 3, wherein the member includes a second protrusion having a second height provided on the first protrusion. 5. An inflow end and an outflow end positioned upstream and downstream of an air flow generated between the airflow and a recording medium, and a floating surface facing the recording medium, wherein the airflow is generated from the inflow end. A recording / reproducing method for performing recording / reproducing using a slider of a disk recording / reproducing apparatus having a member for collecting the airflow or lubricant toward an end, wherein the slider performs recording / reproducing while contacting a lubricant on the disk. Disc recording and playback method to be performed. 6. The disk recording / reproducing method according to claim 5, wherein the member includes a groove. 7. The disk recording / reproducing method according to claim 5, wherein the member includes a first protrusion having a first height provided on the floating surface. 8. The disk recording / reproducing method according to claim 7, wherein the member includes a second protrusion having a second height provided on the first protrusion.