JP4302253B2 - Disc recording / playback device slider - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slider used in a storage device such as a hard disk device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hard disk device (hereinafter referred to as “HDD”) includes a head that records and reproduces data on both sides of a disk that is a recording medium. In the HDD, the head is mounted on a support made of ceramic material or the like called a slider, and is supported in a state of floating with a predetermined interval with respect to the data recording surface of the disk.
[0003]
The HDD includes one or several disks. The discs are stacked on the main shaft at intervals so as not to contact each other.
[0004]
The surface of each disc is apparently the same. In practice, however, each surface is divided into pad sections called tracks, where data is stored. These tracks are arranged as concentric circles. The disc is made of various materials such as metal, resin, and glass. In resin discs such as those used in CDs, the laser stores and retrieves data. In a metal disk, data is stored and retrieved by an electromagnet generally known as a transformer.
[0005]
In order to store data on a magnetic disk, the disk surface is magnetized using a small ceramic block commonly called a slider. The slider incorporates a magnetic transducer that is a so-called write head. More specifically, the slider with the built-in write head floats at a height of several hundred NM to several tens of NM from the disk surface, and the head is excited in several states, and the track located below corresponds to the data. Magnetize as you do.
[0006]
In order to retrieve the data stored on the 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 HDDs use transducers that perform both read and write operations. Recently, magnetoresistive elements and inductance elements are used as read heads.
[0007]
Similar to records, both sides of the disk are typically used to store data or other information necessary for the operation of the HDD. Since the disks are stacked and spaced from each other, each of the stacked disks has a unique read / write head on both the front and back surfaces. It's as if a stereo with record needles on both sides can play both sides of the record at the same time.
[0008]
There are two types of HDDs equipped with a rotary actuator and a linear actuator. A rotary actuator has an actuator arm similar to the tone arm of a record player. Like the tone arm, its actuator arm rotates so that the slider containing the read / write head can be moved to a position above the various tracks on the disk.
[0009]
In this way, the read / write head can be used to magnetize a track on the surface of the disk in a pattern corresponding to the data or to detect a magnetized pattern on the track. For example, if the required data is stored on two different tracks of a disk, the actuator arm can read from one track to the other to read what is representative of the data. Rotate to. The present invention relates to a rotary actuator / HDD.
[0010]
Linear actuators also have similar actuator arms, but the movement of position is done by linear movement rather than rotation.
[0011]
A slider is attached to the tip of an actuator arm of the HDD, and a read / write head is incorporated 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. Thus, the head floats on the rotating disk as described above. The flying height is the thickness of the air lubricating film, that is, the distance between the disk surface and the head.
[0012]
Thus, the pad forms an air bearing surface (ABS) that 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 disk are in mechanical contact during disk rotation.
[0013]
A conventional ABS design basically consists of two tapered pads known as tapered flat sliders. The tapered flat shape of the two pads typically has two or more flat pads, each with a tapered tip. The pads are extended so that the tapered tip is oriented in the direction of rotation of the disk surface.
[0014]
Such a design works well in a linear actuator / HDD because air between the disk and slider basically flows in one direction along the length of the pad. In other words, such a design would allow the slider to move relative to the disk so that the air drawn viscously under the slider flows along the longitudinal axis parallel to the pad from the front of the slider to the rear. It can be said that it works well when placed.
[0015]
The idea of tapered flat design goes back to the era of large diameter files with relatively slow access speeds using linear actuators.
[0016]
Today's HDDs are very different from HDDs with large diameters using linear actuators. Current files are very small and data access is fast. Currently, HDDs are equipped with rotary actuators to process 5.25 ", 3.50", 2.50 ", and 1.80" diameter disks and achieve fast access speeds.
[0017]
By mainly using a rotary actuator, the airflow under the slider is no longer essentially unidirectional and 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 tilt.
[0018]
Therefore, in recent rotary actuators and HDDs, the airflow is no longer considered to move from the front to the rear of the slider or slightly deviate therefrom.
[0019]
The angle of airflow with respect to the longitudinal axis of the slider is called the skew angle. The tilt angle is positive when the actuator arm is positioned so that the airflow is at or outside the outer edge of the slider. The skew angle is negative when the actuator arm is positioned to hit the inner edge or hub of the slider.
[0020]
The taper flat design has an extreme drop in floating altitude when the slider is designed for linear actuators rather than rotary actuators, rather than for positive or negative high skew angles and fast access speeds. Cheap.
[0021]
Also, the flying height is not constant under all the pads because the slider rotates due to airflow twist.
[0022]
The rotation of the slider is similar to tilting the aircraft as the airplane changes direction. In other words, it is a movement that lifts one wing and lowers the other. In the HDD, 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.
[0023]
In the HDD, the floating height of the slider is an important parameter that needs to be controlled. As the flying height increases, the signal amplitude decreases, the signal-to-noise ratio decreases, and thus the error rate increases.
[0024]
When the flying height is lowered, the possibility that the head comes into contact with the disk surface increases. If the flying height comes into contact, wear of both the head and the disk surface proceeds, reliability decreases, and further, it causes a failure of the HDD. Contact with an extreme disk surface that causes a failure is called a crash, and as a result, the data becomes unplayable.
[0025]
Control of slider rotation is also important. When the end portion of the slider is lowered by the rotation, the possibility that the head comes into contact with the disk surface increases. If a rotation occurs that lifts one end of the slider, the distance from the disk surface of the read / write head increases, causing a data error in the same way that a data error occurs when the flying height increases. Become. The adverse effect of such rotation is exacerbated when the read / write head is mounted on its lifted end.
[0026]
The prior art is disclosed in Japanese Patent Laid-Open No. 8-255331. In Japanese Patent Application Laid-Open No. 8-255331, the rear end of the taper portion of the pad is configured to be at a position where the pad width decreases, so that the machining tolerance hardly affects the flying characteristics.
[0027]
[Problems to be solved by the invention]
However, as the recording density of HDDs in recent years has increased, the flying height has been minimized, and the skew angle change speed (seek speed) has been increased. In the conventional configuration disclosed in Japanese Patent Application Laid-Open No. 8-255331, there is a problem that the amount of change in the flying height increases with an increase in seek speed, and wear due to contact between the slider and the disk may occur.
[0028]
An object of the present invention is to provide a slider on the surface of an air bearing in which the flying height variation is small even when the flying height is minimized.
[0029]
Another object of the present invention is to provide a slider that can prevent contact between the disk and the ABS of the slider and suppress wear even when the flying height is minimized.
[0030]
Still another object of the present invention is to provide a slider capable of minimizing the flying height.
[0031]
Still another object of the present invention is to provide a slider capable of suppressing the suction force generated when the disk is started and when the disk is stopped and the slider is stopped when the disk is stopped.
[0032]
[Means for Solving the Problems]
  The slider of the disc recording / reproducing apparatus according to the present invention has an inflow end and an outflow end positioned on the upstream side and the downstream side of the air flow generated between the recording medium and an air bearing surface facing the recording medium. A slider of a disk recording / reproducing apparatus, having a pad portion on the outflow end side,
  The pad portion has a center of the pad as the air flow moves from the air inflow side of the pad portion toward the outflow end.On axisA member that collects the air flow towardAnd the member includes a groove.This achieves the above object.
[0033]
  The groove portion has a tip portion, and the tip portion faces the outflow end side on the central axis of the pad portion.Also good.
You may have the head arrange | positioned at the rear end on the center axis | shaft of the said pad.
[0036]
  The disc recording / reproducing method according to the present invention includes an inflow end and an outflow end located upstream and downstream of an air flow generated between the recording medium, an air bearing surface facing the recording medium, and an outflow end side. A pad portion provided, and the pad portion has a center of the pad as the air flow moves from the air inflow side of the pad portion toward the outflow end.On axisTowards the airFlowHave a collection memberAnd the member includes a groove.Recording and playback using the slider of the disk recording and playback deviceAndThis achieves the above object.
[0037]
  The groove portion may have a tip portion, and the tip portion may be recorded / reproduced using a slider facing the outflow end side on the central axis of the pad portion.
A head may be disposed at the rear end on the central axis of the pad.
[0039]
  BookAccording to an aspect of the invention, even when the flying height of the slider is low, a certain amount of pressure generated on the lower surface of the slider can be secured, and the flying height can be kept stable.
[0040]
According to another aspect of the present invention, the flying height of the slider can be kept low, and the flying height fluctuation due to the fluctuation of the surrounding pressure is small.
[0041]
According to still another aspect of the present invention, even when the flying height of the slider is low, a certain amount of pressure generated on the lower surface of the slider can be secured, and the flying height can be kept stable. In addition, the suction force when the disk is stopped can be suppressed.
[0042]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0043]
(Embodiment 1)
FIG. 1 is a perspective view of the inside of the HDD 100. FIG. 2 is a cross-sectional view of the HDD 100. The HDD 100 is covered with a housing cover (not shown). A suspension 14 is attached to the tip of each actuator arm group 5 that is rotatably attached to the actuator shaft 20. A slider 3 for carrying a magnetic transducer or a read / write head 99 (not shown in FIGS. 1 and 2) is attached to the tip of each suspension 14.
[0044]
A main shaft 1 is mounted in the housing 7. A large number of disks 2 are rotatably attached to the main shaft 1 at intervals. The disk 2 rotates in the direction indicated by the arrow A together with the main shaft 1 rotated by the motor 8. Information is written to or read from the disk 2 by a head 99 (not shown) located in the slider 3 and positioned by the actuator arm set 5.
[0045]
Sliders 3 are provided on both the front and back surfaces of each disk 2, and information is written on or read from the front and back surfaces of each disk 2. Power is applied to the actuator set 5 by the voice coil motor 6, and the actuator arm 5 swings around the actuator shaft 20.
[0046]
A slider 3 and a magnetic transducer (not shown) integrated therewith move on 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 the transducer is due to rotation around the actuator shaft 20. By rotating the actuator / actuator arm 5, the slider 3 and the transducer therein can be located on any track on the surface of the disk 2.
[0047]
FIG. 3 is a detailed view of one of the disks 2 as viewed from above. As is well known as HDD technology, each disk has a concentric array of tracks on which magnetic information is recorded. The inner diameter (ID) 11 is the innermost concentric track where data is stored. The outer diameter (OD) 10 is the outermost concentric track where data is stored.
[0048]
FIG. 4A shows the shape of the air bearing surface (hereinafter referred to as “ABS”) of the slider 3 of the first embodiment. The ABS is formed on the lower surface of the slider 3 and faces the disk surface. The shape of the ABS is formed by molding, etching, laser cutting, ion pulverization, general-purpose machining, or other various methods.
[0049]
The slider 3 has an inflow end 21, an outflow end 22, 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.
[0050]
In addition, an inflow end recess 41 having a lower height than the inner pad 31 and the outer pad 32 is provided, and a center recess 43 having a lower height is provided. The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and the inflow end recess 41 is positioned one step lower on the inflow end 21 side of the inner pad 31 and the outer pad 32.
[0051]
The inflow end 21 faces the direction in which the disk surface rotates. Due to the viscous effect, the rotating disk 2 passes 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 direction of the disk below each pad, As a result, an air lubricating film is formed. The pressure acting on the slider 2 in the direction of the disk 2 is called positive pressure, and the pressure acting on the slider 3 is called negative pressure.
[0052]
The center recess 43 is formed to 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 located at the rear end of the outflow end pad 33.
[0053]
The inflow end recess 41 is formed with a predetermined depth so that a slight lift is generated. 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.
[0054]
In FIG. 4A, the vertical axis 60 is also shown. The angle of the air flow with respect to the longitudinal axis 60 of the slider 3 is called a skew angle and depends on the attachment position of the actuator arm 5 to the rotary actuator shaft 20.
[0055]
The skew angle varies greatly from ID to OD. Also, the skew angle can be positive or negative. As shown by the arrow E, when the actuator arm 5 is positioned so that the airflow hits the outer end 24 of the slider 3, 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 indicated by the arrow F, the skew angle is said to be negative.
[0056]
In the first embodiment, the rotary actuator / actuator arm 5 is installed so that the skew becomes a positive maximum angle at OD and a negative minimum angle at ID. Due to the rotation of the actuator arm 5, the air inflow direction is different and the inflow speed is not constant under all the pads.
[0057]
In the first embodiment, the rotational speed of the disk 2 is constant, and the disk speed under the slider is different and the air flow rate is different from the disk radius fluctuation of the ID and OD. ID is the lowest speed, and OD is the highest speed.
[0058]
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. Further, negative pressure is generated at the ridgelines 81, 82, 83, 84 and 85 of the inflow end recess 41. The slider 3 is balanced by the positive pressure by the air lubrication film generated by the inner pad 31, the outer pad 32, the outflow end pad 33 and the inflow end recess 41, the negative pressure by the air lubrication film, and the pressing force by the suspension 14. A predetermined amount is levitated and held.
[0059]
A groove 76 is provided on the air inflow side of the outflow end pad 33. The groove portion 76 is formed in a dogleg shape. The air that has flowed into the lower side of the outflow end pad 33 from the air inflow side ridgeline 73 side flows toward the central axis 60 through the groove 76, and relatively increases the air flow rate on the central axis 60.
[0060]
The air that has flowed into the central shaft 60 further collides with the wall surface of the closed end of the groove 76 and flows into the disk 2 to generate pressure. Furthermore, it flows under 99 of the head, and the pressure under the head 99 is increased.
[0061]
Therefore, the pressure below the head 99 can be kept high compared to the case where the groove portion 76 is not provided, and even when the flying height is low, a high pressure can be maintained. Not only can it be maintained, but also contact between the disk 2 and the ABS of the slider 3 can be prevented.
[0062]
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 groove 76 and the groove 76 is 30 microns.
[0063]
Further, when the disk stops in Embodiment 1 and the slider stops on the disk, since the slider 3 is provided with the groove 76, the groove 76 does not contact the disk, and the contact area is reduced. be able to. For this reason, the attractive force due to the contact between the disk and the slider can be reduced.
[0064]
Further, when the disk 2 is stopped and the slider 3 is stopped on the disk 2 in the first embodiment, when the lubricant provided on the disk surface adheres to the slider, the slider 3 is provided with a groove 76. Therefore, excess lubricant flows into the groove portion 76, and an appropriate lubricating action can be maintained between the disk and the slider.
[0065]
The groove pattern of the groove portion 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, you may employ | adopt the groove | channel pattern shown by the groove part 76A or groove part 76B shown to FIG.4 (b) and FIG.4 (c).
[0066]
FIG. 6 shows the relationship between the film thickness of the lubricant and the adsorption force. The alternate long and short dash line is when there is no groove, and the solid line is the adsorption force when there is a groove. It can be seen that the adsorption force can be kept low without depending on the film thickness of the lubricant when there is a groove, as compared to when there is no groove.
[0067]
(Embodiment 2)
FIG. 7 is a diagram schematically showing the state of the slider according to the second embodiment during recording and reproduction. 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 of the first embodiment, and only the parts different from the first embodiment will be described.
[0068]
The slider 3 </ b> A has an inflow end 21, an outflow end 22, an inner peripheral end 23, and an outer peripheral end 24. As shown in FIG. 8, the slider 3A is provided with an inner pad 31, an outer pad 32, and an outflow end pad 33.
[0069]
In addition, an inflow end recess 41 having a lower height than the inner pad 31 and the outer pad 32 is provided, and a center recess 43 having a lower height is provided. The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and the inflow end recess 41 is positioned one step lower on the inflow end 21 side of the inner pad 31 and the outer pad 32.
[0070]
The inflow end 21 faces the direction in which the disk surface rotates. Due to the viscous effect, the rotating disk 2 passes 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 direction of the disk below each pad, As a result, an air lubricating film is formed. The pressure acting on the slider 2 in the direction of the disk 2 is called positive pressure, and the pressure acting on the slider 3 is called negative pressure.
[0071]
A magnetic layer 58 is formed on the surface of the disk 2, and a protective film 59 and a lubricating film 60 are formed thereon.
[0072]
The lubricating film 60 on the surface of the rotating disk 2 and the outflow end pad 33 rotate at high speed while being in contact with each other. Pressure is generated between the lubricating film 60 and the slider 3 due to the viscous effect of the lubricant. As a result, the lubricant slider floats in the lubricant.
[0073]
The center recess 43 is formed to 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 located at the rear end of the outflow end pad 33.
[0074]
The inflow end recess 41 is formed with a predetermined depth so that a slight lift is generated by the air lubricating film effect. In the second embodiment, the inflow end recess 41 has a depth of 0.2 μm, and the center recess 43 has a depth of 1 μm.
[0075]
The inner pad 31 and the outer pad 32 generate a positive pressure below the slider due to the air lubricating film. Further, negative pressure is generated at the ridgelines 81, 82, 83, 84, 85 of the inflow end recess 41.
[0076]
At the outflow end pad 33, the lubricant levitation force is caused by the viscous effect of the lubricant, and the slider 3 causes the positive pressure by the air lubricant film generated at the inner pad 31, the outer pad 32, the inflow end recess 41, and the like, The lubricant is lifted by a predetermined amount from the disk 2 and held by the lubricant levitation force generated in step (b) and the pressing force by the suspension 14.
[0077]
In the first embodiment, the slider 3 floats from the disk by the air flow. In the second embodiment, the slider 3A moves in the direction indicated by G, and the inflow side pad floats. The side pad 33 is in contact with a lubricant provided on the disk surface.
[0078]
As shown in FIG. 8, the pad 33 on the outflow end side is formed to be sufficiently small as compared with the first embodiment. In Embodiment 2, the width of the pad 33 at the outflow end is 20 microns and the length is 30 microns with respect to the slider width of 1 mm.
[0079]
Thus, by setting the pad 33 on the outflow end side to be sufficiently small, the slider 3A floats in the lubricant by the liquid floating force of the lubricant generated by contact with the lubricant.
[0080]
At this time, although a protective film and a magnetic layer are formed under the lubricant, contact between the protective film and the magnetic layer and the slider hardly occurs due to the floating of the lubricant. Because the floating force by the lubricant is used, the flying height is unlikely to change due to the surrounding pressure environment.
[0081]
FIG. 9 shows the distance between the magnetic layer and the slider head when the surrounding pressure is reduced. The alternate long and short dash line is a case where the pad 33 is separated from the lubricant of the disk and floats by air lubrication. This is the case.
[0082]
According to the second embodiment, the change in the flying height is suppressed even if the pressure changes. This is because air lubrication is affected by atmospheric pressure, but the flying pressure due to lubricant is less susceptible to atmospheric pressure.
[0083]
Further, the thickness of the lubricant used in FIG. 9 is 6 nm in the case of air lubrication, and 8 nm in the case of using viscosity by the lubricant. As shown in FIG. 9, as compared with the case where an air lubricating film is used, the gap between the magnetic layer and the head can be kept low without considering the influence of pressure.
[0084]
Note that the ABS shape of the slider of the second embodiment is not limited to this, and may be a shape as shown in FIGS. FIG. 10 is a view showing the shape of the surface of another slider 3C of the second embodiment, and the outflow end pad 33 has a groove.
[0085]
FIG. 11 shows an enlarged view of the outflow end pad. By forming the groove in this way, the lubricant flows along the groove, and a high lubricant pressure acts on the central axis of the groove. Due to the pressure of the lubricant, the slider easily floats in the lubricant.
[0086]
(Embodiment 3)
FIG. 12A shows an ABS shape of the slider 3D according to the third embodiment. The ABS is formed on the lower surface of the slider 3D and faces the disk surface. The shape of the ABS is formed by molding, etching, laser cutting, ion pulverization, general-purpose machining, or other various methods. Hereinafter, description of portions common to the first embodiment and the second embodiment will be omitted.
[0087]
The slider 3 has an inflow end 21, an outflow end 22, an inner peripheral end 23, and an outer peripheral end 24. As shown in FIG. 12A, the slider 3 is provided with an inner pad 31, an outer pad 32, and an outflow end pad 33. In addition, an inflow end recess 41 having a lower height than the inner pad 31 and the outer pad 32 is provided, and a center recess 43 having a lower height is provided.
[0088]
The inflow end recess 41 is provided with an inner pad 31 and an outer pad 32, and the inflow end recess 41 is positioned one step lower 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.
[0089]
Due to the viscous effect, the rotating disk 2 passes 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 direction of the disk below each pad, As a result, an air lubricating film is formed. The pressure acting on the slider 2 in the direction of the disk 2 is called positive pressure, and the pressure acting on the slider 3 is called negative pressure.
[0090]
The center recess 43 is formed to 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 located at the rear end of the outflow end pad 33.
[0091]
The inflow end recess 41 is formed with a predetermined depth so that a slight lift is generated. 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.
[0092]
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. Further, negative pressure is generated at the ridgelines 81, 82, 83, 84, 85 of the inflow end recess 41.
[0093]
The slider 3 is balanced by the positive pressure by the air lubrication film generated by the inner pad 31, the outer pad 32, the outflow end pad 33 and the inflow end recess 41, the negative pressure by the air lubrication film, and the pressing force by the suspension 14. A predetermined amount is levitated and held.
[0094]
A protrusion 92 is provided on the air inflow side of the outflow end pad 33. The protrusion 92 is formed so as to protrude from the outflow end pad 33 in the disk direction. The protrusions 92 are formed by DLC sputtering or the like.
[0095]
In the present embodiment, the protrusion amount is 30 nm from the surface of the outflow end pad. The air that flows into the lower side of the outflow end pad 33 from the air inflow side ridge line 73 flows toward the central axis 60 by the projection 92 and relatively increases the air flow rate on the central axis 60.
[0096]
The air that has flowed into the central shaft 60 further collides with the wall surface of the end of the closed square shape of the projection 92 and flows into the disk 2 to generate pressure. Therefore, the pressure below the head 99 can be kept high as compared with the case where there is no groove, and even when the flying height is low, a high pressure can be kept, so that a constant and constant flying height can be maintained. In addition, contact between the disk 2 and the ABS of the slider 3 can be prevented.
[0097]
Further, when the disk stops in Embodiment 3 and the slider stops on the disk, since the slider 3 is provided with the protrusion 92, only the portion of the protrusion 92 and the ridge line 71 contact the disk, The contact area between the slider and the disk can be reduced. For this reason, the attractive force due to the contact between the disk and the slider can be reduced.
[0098]
Further, when the disk 2 is stopped and the slider 3 is stopped on the disk 2 in the third embodiment, the lubricant provided on the disk surface adheres only to the protrusion 92, and the outflow end pad 33 of the slider 3 Lubrication is difficult to adhere to the entire surface.
[0099]
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, you may employ | adopt the pattern shown by protrusion 92A shown in FIG.12 (b). There may be a plurality of protrusions as shown in FIG.
[0100]
【The invention's effect】
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.
[0101]
Further, according to the present invention, the slider is stopped when the disk is stopped, and there is an excellent effect that the suction force generated at the time of starting the disk and during the disk stopping operation can be suppressed.
[0102]
Furthermore, 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 cross-sectional view of an HDD.
FIG. 3 is a detailed view of one disk 2 as viewed from above.
FIG. 4 is a view showing the shape of an air bearing surface (ABS) of the slider 3 according to the first embodiment.
FIG. 5 is a sectional view of the slider 3 according to the first embodiment.
FIG. 6 is a graph showing the relationship between the film thickness of the lubricant and the adsorptive power according to the first embodiment.
FIG. 7 is a diagram schematically showing a state during recording / reproduction of the slider according to the second embodiment.
FIG. 8 is a diagram showing an ABS shape of a slider according to a second embodiment of the second embodiment.
FIG. 9 is a graph showing the relationship between the ambient pressure environment and the flying height in 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.
12 is a diagram showing an ABS shape of a slider according to Embodiment 3. FIG.
[Explanation of symbols]
1 Spindle
2 discs
3 Slider
5 Actuator arm set
6 Voice coil motor
7 Housing
8 Motor
14 Suspension
20 Actuator shaft
99 heads
11 Inner diameter (ID)
10 Outer diameter (OD)
21 Inflow end
22 Outflow end
23 Inner edge
24 Outer edge
31 inner pad
32 Outside pad
33 Outflow end pad
41 Inlet end recess
43 Central Recess
59 Protective film
60 Lubricating film
92 Protrusions

Claims (6)

A slider of a disk recording / reproducing apparatus having an inflow end and an outflow end positioned on the upstream side and the downstream side of an air flow generated between the recording medium and an air bearing surface facing the recording medium,
A pad portion on the outflow end side;
The pad portion, in accordance with the air flow toward the outflow end of the air inlet side of said pad portion, have a member for collecting the air flow toward on the central axis of the pad,
The member is a slider of a disk recording / reproducing apparatus including a groove . 2. The slider of the disk recording apparatus according to claim 1, wherein the groove portion has a tip portion, and the tip portion faces an outflow end side on a central axis of the pad portion. 3. The slider of the disk recording / reproducing apparatus according to claim 1, further comprising a head disposed at a rear end on a central axis of the pad. An inflow end and an outflow end located on the upstream side and the downstream side of the air flow generated between the recording medium, a floating surface facing the recording medium, and a pad portion provided on the outflow end side,
The pad portion, in accordance with the air flow toward the outflow end of the air inlet side of said pad portion, towards on the central axis of the pad have a member for collecting the air stream, wherein the member includes a groove recording how to record and reproduce by using the slider of the disk recording and reproducing apparatus. The recording / reproducing method according to claim 4, wherein the groove portion has a tip portion, and the tip portion is recorded / reproduced using a slider facing an outflow end side on a central axis of the pad portion. 6. The recording / reproducing method according to claim 4, wherein a head is disposed at a rear end on the center axis of the pad.

Images