JP2014026692A - Magnetic head, head gimbal assembly provided with the same and disk device - Google Patents

Abstract

A magnetic head with improved reliability and stability, and a head gimbal assembly and a disk device including the magnetic head are provided.
According to an embodiment, a magnetic head includes a head slider and a recording element and a reproducing element provided in an outflow side end portion of the head slider with respect to an air flow. The head slider support surface 43 includes a leading step 52 provided at the inflow side end with respect to the air flow, a skirt 72 provided at the inflow side end and extending in the width direction of the head slider, and a leading step. A leading pad 53 having a connecting portion 53b provided at the center in the width direction and extending to the skirt portion; a first groove surface 74 provided on both sides of the connecting portion and continuing to the downstream center portion of the skirt portion; Provided on the upstream side of the first groove surface, provided on the both sides in the width direction of the first groove surface between the second groove surface 76 deeper than the first groove surface, and between the second groove surface and the skirt portion, A negative pressure generating groove 78 deeper than the two groove surfaces.
[Selection] Figure 4

Description

  Embodiments described herein relate to a magnetic head used in a disk device such as a magnetic disk device, a head gimbal assembly including the head, and a disk device.

  As a disk device, for example, a magnetic disk device is a magnetic disk as a recording medium disposed in a case, a spindle motor that supports and rotates the magnetic disk, and a magnetic that reads / writes information from / to the magnetic disk. And a carriage assembly that supports the magnetic head so as to be movable with respect to the magnetic disk. The magnetic head has a head slider attached to the suspension of the carriage assembly, and a head portion provided on the head slider, and the head portion includes a recording element for writing and a reproducing element for reading. ing.

  The head slider has a support surface (air bearing surface: ABS) facing the recording surface of the magnetic disk. A predetermined head load is applied to the head slider in a direction toward the magnetic recording layer of the magnetic disk by the suspension. During the operation of the magnetic disk apparatus, an air flow is generated between the rotating magnetic disk and the head slider, and the head slider is lifted from the magnetic disk recording surface by the principle of air-fluid lubrication on the support surface of the head slider. (Positive pressure) acts. By balancing the flying force and the head load, the head slider floats with a gap from the recording surface of the magnetic disk.

  In recent years, with the demand for an increase in recording density, reduction in head flying height and head flying control in a low flying height area are regarded as important, and technological development for dynamically controlling the head flying height is rapidly progressing. At present, the flying gap between the head slider and the magnetic disk near the R / W element in the magnetic head is 10 nm or less, and the reproducing element / recording element (R / W element) is dynamically projected to perform magnetic spacing. Due to the combined use of the control technology (DFH), the gap between the R / W element and the medium at the time of reproduction / recording approaches several nanometers.

  As a result, the lubricant (organic liquid) applied to the disk surface is transferred to the support surface of the head slider that floats on the magnetic disk, increasing the magnetic spacing and making the head slider floating unstable. Issues such as making them appear have become obvious.

JP 2009-110618 A

  The lubricant transferred to the support surface of the slider of the magnetic head moves and accumulates on the air outflow side end surface of the head slider by the air flow. If this transfer lubricant accumulates excessively, the flying height of the slider becomes unstable. This causes a problem (high fly write, HFW) that the recording / reproducing signal becomes unstable. In addition, while the magnetic head is unloaded while the magnetic disk device is stopped, the lubricant diffuses back to the R / W element on the support surface side, so that the playback signal fluctuates when the magnetic disk device starts up. Problem arises.

  The present invention has been made in view of the above points, and the problem is that a magnetic head capable of performing stable recording and reproduction and having improved reliability, a head gimbal assembly including the magnetic head, and a magnetic disk device are provided. Is to provide.

  According to the embodiment, the magnetic head includes a head slider having a support surface facing the surface of the recording medium, an inflow side end portion and an outflow side end portion for an air flow generated between the surface and the support surface; A recording element and a reproducing element provided in an outflow side end portion of the head slider with respect to the air flow; The supporting surface of the head slider includes a leading step provided at an inflow side end with respect to the air flow, a skirt provided at the inflow side end and extending in a width direction of the head slider, and the leading step. A leading pad having a connecting portion that extends to the skirt portion at the center in the width direction, and a first groove surface that is provided on both sides of the connecting portion and continues to the downstream center portion of the skirt portion, , Provided on the upstream side of the first groove surface, between the second groove surface deeper than the first groove surface, and between the second groove surface and the skirt portion, on both sides in the width direction of the first groove surface And a negative pressure generating groove deeper than the second groove surface.

FIG. 1 is a plan view showing an HDD according to an embodiment. FIG. 2 is an enlarged side view showing a magnetic head portion in the HDD. FIG. 3 is a perspective view showing a support surface side of a head slider of the magnetic head. FIG. 4 is a plan view showing a support surface side of the head slider. FIG. 5 is a diagram showing the relationship between the ratio of the width d of the first groove surface to the total head slider width D and the flying pitch change rate for a head slider having no second groove surface. FIG. 6 is a diagram showing the relationship between the ratio of the width d of the first groove surface to the total width D of the head slider and the flying pitch change rate for a head slider having a first groove surface and a second groove surface. 7 is a diagram showing a difference between the flying pitch change rate shown in FIG. 5 and the flying pitch change rate shown in FIG. 6.

Hereinafter, an embodiment in which a disk device is applied to a hard disk drive (hereinafter referred to as HDD) will be described in detail with reference to the drawings.
FIG. 1 shows the internal structure of the HDD with the top cover removed, and FIG. 2 shows the magnetic head in a floating state. As shown in FIG. 1, the HDD includes a housing 10. The housing 10 includes a rectangular box-shaped base 12 having an open top surface and a top cover (not shown) that is screwed to the base with a plurality of screws to close the upper end opening of the base.

  In the housing 10, a magnetic disk 16 as a recording medium and a mechanism unit are provided on a base 12. The mechanism unit includes a spindle motor 18 that supports and rotates the magnetic disk 16, and a plurality of, for example, two magnetic heads 40 that record and reproduce information on the magnetic disk 16. The carriage assembly 22 is movably supported with respect to the carriage assembly 22 and includes a voice coil motor (hereinafter referred to as VCM) 24 that rotates and positions the carriage assembly 22. Mounted on the base 12 are a ramp load mechanism 25 that holds the magnetic head at a position separated from the magnetic disk when the magnetic head 40 moves to the outermost periphery of the magnetic disk, and electronic components such as a preamplifier and a head IC. The substrate unit 21 and the like are provided.

  A control circuit board (not shown) that controls operations of the spindle motor 18, the VCM 24, and the magnetic head 40 is screwed to the outer surface of the bottom wall of the base 12 via the board unit 21.

  As shown in FIGS. 1 and 2, the magnetic disk 16 has a substrate 19 made of a non-magnetic material, for example, formed in a disk shape having a diameter of about 2.5 inches (about 63.5 mm). A magnetic recording layer 20 is laminated on each surface of the substrate 19, a protective film (not shown) is formed thereon, and a lubricant (for example, oil, organic liquid) with a thickness of about 1 nm is formed on the uppermost layer. 23 is applied.

  The magnetic disk 16 is fitted on the outer periphery of a hub (not shown) of the spindle motor 18 and is fixed on the hub by a clamp spring 17. Thereby, the magnetic disk 16 is supported in a state of being located in parallel with the bottom wall of the base 12. The magnetic disk 16 is rotated in the direction of arrow B by the spindle motor 18 at a predetermined speed, for example, 5400 rpm or 7200 rpm.

  The carriage assembly 22 includes a bearing portion 26 fixed on the bottom wall of the base 12 and a plurality of arms 32 extending from the bearing portion. These arms 32 are positioned parallel to the surface of the magnetic disk 16 and at a predetermined distance from each other, and extend from the bearing portion 26 in the same direction. The carriage assembly 22 includes an elongated plate-like suspension 38 that can be elastically deformed. The suspension 38 is configured by a leaf spring, and the base end thereof is fixed to the distal end of the arm 32 by spot welding or adhesion, and extends from the arm. Each suspension 38 may be formed integrally with the corresponding arm 32.

  As shown in FIG. 2, each magnetic head 40 has a substantially rectangular parallelepiped head slider 42 and a recording / reproducing head portion 44 provided on the head slider 42, and is provided at the tip of the suspension 38. It is fixed to the gimbal 41. In the suspension 38, dimples, here, substantially hemispherical protrusions 37 projecting toward the magnetic head are formed at positions facing the head mounting portion of the gimbal 41, that is, positions facing the central portion of the magnetic head 40. ing. The protrusion 37 is in contact with the substantially central portion of the plane of the head slider 42 via the gimbal 41. The gimbal 41 is elastically pressed against the protrusion 37 by its own elasticity. As a result, the head mounting portion of the gimbal 41 and the magnetic head 40 can be displaced in the pitch direction, the roll direction, or in the vertical direction around the protrusion 37. Further, a predetermined head load L is applied to the magnetic head 40 toward the surface of the magnetic disk 16 by the spring force of the suspension 38.

  The suspension 38, the gimbal 41, the magnetic head 40, and the arm 32 constitute a head gimbal assembly. The head gimbal assembly may not include the arm 32.

  As shown in FIG. 1, the carriage assembly 22 has a support frame 46 extending from the bearing portion 26 in a direction opposite to the arm 32, and the voice coil 47 constituting a part of the VCM 24 is supported by the support frame. Has been. The support frame 46 is integrally formed on the outer periphery of the voice coil 47 with synthetic resin. The voice coil 47 is positioned between a pair of yokes 49 fixed to the base 12 and constitutes the VCM 24 together with these yokes and a magnet (not shown) fixed to one of the yokes. By energizing the voice coil 47, the carriage assembly 22 rotates around the bearing portion 26, and the magnetic head 40 is moved and positioned on a desired track of the magnetic disk 16.

  The ramp loading mechanism 25 includes a ramp 51 provided on the bottom wall of the base 12 and disposed outside the magnetic disk 16, and a tab 48 extending from the tip of each suspension 38. When the carriage assembly 22 rotates to the retracted position outside the magnetic disk 16, each tab 48 engages with the ramp surface formed on the ramp 51, and then is pulled up by the ramp surface inclination and the magnetic head 40. Perform the unload operation.

Next, the configuration of the magnetic head 40 will be described in detail. FIG. 3 is a perspective view showing the head slider 42 of the magnetic head, and FIG. 4 is a plan view of the head slider.
As shown in FIGS. 3 and 4, the magnetic head 40 is configured as a floating head, and has a head slider 42 and a recording / reproducing head portion 44. The head slider 42 is formed in a substantially rectangular parallelepiped shape as a whole by, for example, a sintered body of alumina and titanium carbide (AlTiC, Al ₂ O ₃ —TiC), and has a rectangular support surface (facing the surface of the magnetic disk 16 ( Air bearing surface (ABS) 43, inflow end surface 42a extending perpendicular to the support surface, outflow end surface 42b extending orthogonal to the support surface, and inflow end surface 42a and outflow side orthogonal to the support surface 43, respectively. It has a pair of side surfaces 42c extending between the end surfaces 42b. The head portion 44 is formed of a thin film at the outflow side end of the head slider 42.

  The longitudinal direction of the support surface 43 is defined as a first direction X, and the width direction orthogonal thereto is defined as a second direction Y. The head slider 42 is formed so that the length L in the first direction X is 1.25 mm or less, for example, 0.85 mm, and the width W along the second direction Y is 1.0 mm or less, for example, 0.7 mm. It is configured as a femto slider.

  The head slider 42 floats by the air flow C (see FIG. 2) generated between the disk surface and the support surface 43 by the rotation of the magnetic disk 16. During the operation of the HDD, the support surface 43 of the head slider 42 faces the disk surface with a gap. Here, the direction of the air flow C coincides with the rotation direction B of the magnetic disk 16. The head slider 42 is disposed so that the first direction X of the support surface 43 substantially coincides with the direction of the air flow C with respect to the surface of the magnetic disk 16.

  As shown in FIGS. 3 and 4, a belt-like negative pressure generating groove (first negative pressure generating groove) 50 extending over the entire length in the second direction Y is formed in the substantially central portion of the support surface 43. When the thickness of the head slider 42 is 0.23 mm, for example, the depth of the negative pressure generating groove 50 is 800-1500 nm, for example, 1500 nm. By providing the negative pressure generating groove 50, it is possible to generate a negative pressure at the center of the support surface 43 at all yaw angles realized by the HDD.

  In the support surface 43, an elongated skirt portion 72 is formed at the inflow side end, and extends over substantially the entire length of the head slider 42 in the second direction Y. A substantially rectangular leading step 54 is formed on the downstream side of the skirt portion 72 and extends over almost the entire length of the head slider 42 in the second direction Y. The skirt portion 72 and the leading step 52 are provided so as to protrude from the bottom surface of the negative pressure generating groove 50 and are positioned on the inflow side of the negative pressure generating groove 50 with respect to the air flow C.

  In order to maintain the pitch angle of the magnetic head 40, a leading pad 53 is provided on the leading step 52 to support the head slider 42 with an air film. The leading pad 53 and the skirt portion 72 are formed at the same height. The leading pad 53 is formed in an M-shape that opens at a plurality of locations toward the inflow side. The leading pad 53 has a connecting portion 53b that extends to the central portion of the skirt portion 72 on the central axis C of the head slider at the central portion in the width direction, that is, is connected to the central portion.

  At the inflow side end of the head slider 42, first groove surfaces 74 are formed on both sides in the width direction of the connecting portion 53 b and on the upstream side of the leading pad 53. The first groove surface 74 is continuous with the downstream central portion of the skirt portion 72. A second groove surface 76 deeper than the first groove surface is formed on the upstream side of the first groove surface 74, and the width direction of the first groove surface 74 is further between the second groove surface 76 and the skirt portion 72. Negative pressure generating grooves (second negative pressure generating grooves) 78 are provided on both sides. The negative pressure generating groove 78 is formed deeper than the second groove surface 76, and is formed, for example, at the same depth as the negative pressure generating groove (first negative pressure generating groove) 50.

  As shown in FIG. 4, the total width in the second direction Y of the head slider 42 is D, and the width along the second direction Y of the first groove surface (connection step) 74 located on each side in the width direction of the connecting portion 53b ( The width d of the first groove surface 74 is about 5 to 30% of the total width D, where d is the width of the first groove surface on each side of the connecting portion.

  In providing the first groove surface 74, the optimum value of the width d is shown. The optimum value indicated here means “the maximum width within a range in which the flying height posture of the head slider can be maintained”. From the viewpoint of preventing aggregation of the organic liquid material, it is desirable that the width d of the first groove surface 74 is wider. On the other hand, if it is excessively widened, it is considered that the air flow rate becomes insufficient with an increase in the low gap area, the positive pressure on the leading end side of the head slider decreases, and it becomes difficult to maintain the flying pitch posture of the head slider. According to the present embodiment, the first groove surface (connection step) 74 and the second groove surface (intermediate groove) 76 are provided. Also, as shown in FIGS. 5 to 7, the width d of the first groove surface 74 is increased by setting the width d of the first groove surface 74 to about 5% to 30% of the total width D of the head slider 42. However, it is possible to generate the necessary positive pressure and suppress the decrease in the flying pitch posture.

  FIG. 5 shows the analysis result of the head slider without the second groove surface (intermediate groove) 76, the horizontal axis shows the ratio of the width d of the first groove surface to the total width D of the head slider, and the vertical axis shows the basic The rate of change of the flying pitch with respect to the model is shown. Here, the basic model is, for example, a magnetic head in which the total width D of the head slider is 700 μm and the width d of the first groove surface is 150 μm, and the flying pitch of this basic model is 100%. Further, the pitch change rates are analyzed at five radial positions of the magnetic disk, and these are compared and shown.

  FIG. 6 shows the analysis result of the head slider having the first groove surface 74 and the second groove surface (intermediate groove) 76, and the horizontal axis shows the ratio of the width d of the first groove surface to the total width D of the head slider. The vertical axis represents the rate of change of the flying pitch relative to the basic model. The flying pitch of the basic model similar to the above is 100%.

  7 has a difference in pitch change rate obtained by subtracting the fly pitch change rate shown in FIG. 5 from the fly pitch change rate shown in FIG. 6, that is, the case where the head slider has the second groove surface 76. The difference in the flying pitch change rate from the case where there is no is shown.

  As shown in FIGS. 5 to 7, the width d of the first groove surface 74 is increased by setting the width d of the first groove surface 74 to about 5% to 30% of the total width D of the head slider 42. In addition, a necessary positive pressure can be generated, and a decrease in the flying pitch posture can be suppressed. It can also be seen that by providing the second groove surface 76, the pitch change rate is reduced, and a more stable flying pitch posture can be maintained.

  On the other hand, as shown in FIGS. 3 and 4, a negative pressure cavity 54 formed of a recess is formed from the substantially central portion of the support surface 43 to the outflow end side. The negative pressure cavity 54 is located on the outflow end side of the negative pressure generating groove 50 and is open toward the outflow side end surface 42 b of the head slider 42. The negative pressure cavity 54 is formed shallower than the negative pressure generating groove 50, that is, formed at a position higher than the bottom surface of the negative pressure generating groove 50.

  A rib-like intermediate step 56 and a pair of side steps 58 are formed so as to surround the negative pressure cavity 54 on the support surface 43. The intermediate step 56 is located between the negative pressure generating groove 50 and the negative pressure cavity 54, and extends between both side edges of the support surface 43 along the second direction Y. The intermediate step 56 is provided so as to protrude from the bottom surface of the negative pressure cavity 54, and is located on the inflow side of the negative pressure cavity 54 with respect to the air flow C.

  The pair of side steps 58 is formed along each side edge of the support surface 43, and extends from the intermediate step 56 to the outflow end side of the support surface 43. These side steps 58 protrude from the bottom surface of the negative pressure cavity 54.

  The intermediate step 56 and the pair of side steps 58 are generally formed in a substantially U shape with the upstream side closed and opened toward the downstream side. A negative pressure cavity 54 is defined by an intermediate step 56 and a pair of side steps 58.

  As shown in FIGS. 3 and 4, the head slider 42 has a trailing step 62 formed at the end portion on the outflow side of the support surface 43 with respect to the direction of the air flow C. The trailing step 62 is formed so as to protrude with respect to the bottom surface of the negative pressure cavity 54, and the protruding height is the same as that of the leading step 52. The trailing step 62 is located approximately in the center of the support surface 43 in the second direction Y. On the upper surface of the trailing step 62, a trailing pad 63 is provided that supports the head slider 42 with an air film.

  The trailing pad 63 is provided with a gap from the outflow side end surface of the trailing step 62, here, from the outflow side end surface 42 b of the head slider 42 to the inflow side. The trailing pad 63 is formed at the same height level as the leading pad 53, the intermediate step 56, and the side step 58 and constitutes the support surface 43 as the uppermost surface of the head slider 42. The trailing step 62 and the trailing pad 63 constitute a second pressure generating unit.

  The head portion 44 of the magnetic head 40 has a recording element 65 and a reproducing element 66 that record and reproduce information on the magnetic disk 16. These recording element 65 and reproducing element 66 are embedded in the downstream end portion of the head slider 42 with respect to the direction of the air flow C, here, in the trailing step 62. The leading ends of the recording element 65 and the reproducing element 66 are exposed to the support surface 43 at the position of the trailing pad 63.

  The support surface 43 of the head slider 42 has a pair of elongated center rails 68 extending from the intermediate step 56 to the trailing step 62 along the first direction X. The pair of center rails 68 are located on both sides of the central axis C of the head slider 42 and face each other with a gap in the second direction Y. The center rail 68 is formed such that the height from the bottom surface of the negative pressure cavity 54 is the same as the height of the intermediate step 56 and the trailing pad 63. A guide groove 70 is formed between the pair of center rails 68 to guide the air flow to the trailing step 62 and the trailing pad 63. The guide groove 70 is formed along the central axis C, passes through the negative pressure generation groove 50, and further extends to the leading step 52.

  In this embodiment, the support surface (ABS) 43 including the surface of the trailing pad 63 from which the tips of the recording element 65 and the reproducing element 66 are exposed has an arithmetic surface roughness of the surface of the other part of the head slider 42. Roughness, here, the surface roughness of the upper surface of the trailing step 62 and the surface roughness of the bottom surface of the negative pressure cavity 54 are formed to be rougher.

  According to the HDD configured as described above, the magnetic head 40 floats by the air flow C generated between the magnetic disk surface and the support surface 43 by the rotation of the magnetic disk 16. Thus, during the operation of the HDD, the support surface 43 of the head slider 42 always faces the surface of the magnetic disk with a gap. The magnetic head 40 floats in an inclined posture in which the recording element 65 and the reproducing element 66 of the head portion 44 are closest to the surface of the magnetic disk 16.

  In general, when the magnetic head 40 is running on the magnetic disk 16, a strong air flow is generated on the support surface 43 of the head slider 42, so that an organic liquid (magnetic disk lubricant or the like) is generated. Even if it adheres, it is difficult to flow and deposit. However, the bottom surface of the negative pressure generating groove 78 formed between the skirt portion 72 and the leading step 52 at the end on the inflow side of the head slider 42 has a relatively weak air flow and is liable to accumulate a liquid material. When the liquid deposited on the bottom surface of the negative pressure generating groove 78 is diffused to the support surface 43 when the magnetic head 40 is unloaded (the magnetic head is retracted from the magnetic disk 16) to form a film, the load (device) At the time of activation), the flying height of the magnetic head 40 is increased by the thickness of the formed film, and the read / write characteristics are deteriorated. Therefore, as in the present embodiment described above, by providing the first groove surface 74 and the second groove surface 76 between the leading pad 53 and the skirt portion 72, the organic liquid material to the negative pressure generating groove 78 is provided. Aggregation can be prevented. Further, the width d of the first groove surface 74 following the central portion of the skirt portion 72 is set to about 5 to 30% of the total width D of the head slider 42, so that the necessary positive width is increased even if the width d of the first groove surface is increased. A pressure can be generated, and a drop in the flying pitch posture of the head slider 42 can be suppressed.

  As described above, according to the present embodiment, even when a liquid material such as a lubricant is transferred to the head, the flying height hardly changes, stable recording / reproduction can be performed, and reliability is improved. A magnetic head, a head gimbal assembly, and a magnetic disk device are obtained.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  For example, the head slider is not limited to the femto slider but can be applied to a pico slider, a pemto slider, or a slider having a larger dimension. The shape, dimensions, etc. of the trailing step, trailing pad, and other parts in the head slider can be changed as necessary. In the disk device, the number of magnetic disks is not limited to one and can be increased.

DESCRIPTION OF SYMBOLS 12 ... Base, 16 ... Magnetic disk, 18 ... Spindle motor 22 ... Carriage assembly, 40 ... Magnetic head, 42 ... Head slider,
43 ... support surface, 44 ... head portion, 50 ... negative pressure generating groove (first negative pressure generating groove),
78 ... Negative pressure generating groove (second negative pressure generating groove), 52 ... Reading step,
53 ... leading pad, 54 ... negative pressure cavity, 62 ... trailing step,
63 ... trailing pad, 65 ... recording element, 66 ... reproducing element, 72 ... skirt part,
74 ... 1st groove surface, 76 ... 2nd groove surface

Claims (7)

A head slider having a support surface facing the surface of the recording medium, an inflow side end portion and an outflow side end portion for an air flow generated between the surface and the support surface;
A recording element and a reproducing element provided in the outflow side end of the head slider,
The support surface is provided on the leading step, a leading step provided at the inflow side end, a skirt provided at the inflow side end and extending in the width direction of the head slider, and the leading surface. A leading pad having a connecting portion extending to the skirt portion at a central portion in the width direction, a first groove surface provided on both sides of the connecting portion and continuing to a central portion on the downstream side of the skirt portion, and upstream of the first groove surface A second groove surface deeper than the first groove surface, and between the second groove surface and the skirt portion, on both sides in the width direction of the first groove surface, A magnetic head comprising a deeper negative pressure generating groove.   2. The magnetic head according to claim 1, wherein a width of the first groove surface along a width direction of the head slider is formed to be 5 to 30% with respect to a total width of the head slider on one side of the connecting portion. .   3. The magnetic head according to claim 1, wherein the support surface includes a negative pressure generating groove provided on a downstream side of the leading step and extending along a width direction of the support surface.   The support surface includes a trailing step provided on the outflow side end, an outflow end provided on the trailing step and positioned with a gap from the end surface of the outflow side end to the inflow side. The magnetic head according to claim 1, further comprising a trailing pad.   The magnetic head according to claim 4, wherein a part of the recording element and the reproducing element are exposed to the trailing pad. A magnetic head according to any one of claims 1 to 5,
And a suspension for supporting the magnetic head via a gimbal. A disk-shaped recording medium;
A drive unit for rotating the recording medium;
A disk device comprising: the magnetic head according to claim 1 for performing information processing on the recording medium.

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