Disk device

Abstract

Provided is a disk device capable of suppressing deterioration of resonance characteristics of a slider. A disk device according to an embodiment includes a slider, a suspension, and a first adhesive that attaches the slider to the suspension. The flexible member of the suspension has an outer surface of a metal plate to which the first adhesive adheres, and an insulator provided on the outer surface and surrounding the first adhesive. The insulator has two first walls that approach each other toward a rotation axis of the carriage, and a second wall that extends farther away from the rotation axis than the first walls and is separated from the first walls. And a third wall which is located at the center of the insulator in the circumferential direction, is located between the first wall and the second wall, and is shorter than the second wall in the circumferential direction. The distance between the second wall and the third wall is shorter than the distance between the first wall and the third wall.

Description

[0001] This application claims the priority of Japanese Patent Application No. 2023-150136 (filing date: September 15, 2023) as a basic application. The present application incorporates the entire contents of the basic application by reference. Technical Field

[0002] An embodiment of the present invention relates to a disk device. Background Art

[0003] A disk device such as a hard disk drive has a suspension flexure and a slider attached to the flexure. The slider is attached to the flexure by, for example, an adhesive.

[0004] When the slider is mounted on the suspension, the adhesive is compressed (squeezed) between the slider and the flexible member and expands. The way the adhesive expands sometimes affects the resonance characteristics of the slider. Summary of the invention

[0005] An embodiment of the present invention provides a disk device capable of suppressing deterioration in resonance characteristics of a slider.

[0006] The disk device according to the present embodiment includes a magnetic disk, a slider, a carriage, a suspension, and a first adhesive. The slider is configured to read and write information on the magnetic disk. The carriage is configured to rotate around a rotation axis. The suspension is mounted on the carriage. The first adhesive mounts the slider on the suspension. The suspension includes a base plate mounted on the carriage, a load beam mounted on the base plate, and a flexible member mounted on the load beam. The flexible member includes a metal plate, an outer surface of the metal plate to which the first adhesive is attached, and an insulator provided on the outer surface and surrounding at least a portion of the first adhesive. The insulator has two first walls, a second wall, and a third wall, the two first walls extending toward the rotation axis in a manner close to each other, the second wall extending across the center of the insulator in the circumferential direction (circumferential direction) around the rotation axis at a position farther from the rotation axis than the two first walls and separated from the two first walls, and the third wall at least partially located at the center of the insulator in the circumferential direction and located between the two first walls and the second wall and shorter than the second wall in the circumferential direction. The distance between the second wall and the third wall is shorter than the distance between each of the two first walls and the third wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is an exemplary perspective view showing an HDD according to one embodiment in an exploded manner.

[0008] Figure 2 FIG. 1 is an illustrative top view showing the magnetic disk and HSA according to the above embodiment.

[0009] Figure 3 It is an illustrative plan view showing a part of the HGA according to the above embodiment.

[0010] Figure 4 This is an exemplary cross-sectional view partially showing the magnetic disk and HGA according to the above embodiment.

[0011] Figure 5 This is an exemplary cross-sectional view showing a part of the HGA according to the above embodiment.

[0012] Figure 6 FIG. 1 is an illustrative top view showing a portion of the flexible member according to the above embodiment.

[0013] Description of Reference Numerals

[0014] 10 hard disk drive (HDD); 12 magnetic disk; 35 slide; 45 suspension; 46 slider; 51 substrate; 52 load beam; 53 flexible member; 61 backing plate; 61b surface; 62 substrate layer; 63 cover layer; 64 conductive layer; 75 pad; 90PI pattern; 91 1st wall; 91a, 91b end; 92 2nd wall; 93 3rd wall; 94 4th wall; 95 platform; 96 protrusion; 99 partition wall; 101, 102 adhesive; 105 1st part; 106 2nd part; 107 3rd part; 109 extension; 109a, 109b end; Ax2 center axis; Cn center; Cl interval; Ls labyrinth seal. DETAILED DESCRIPTION

[0015] Below, refer to Figures 1 to 6 , an embodiment is described. In addition, in this specification, the constituent elements and the description of the elements involved in the embodiment are sometimes recorded in multiple expressions. The constituent elements and their descriptions are only examples and are not limited to the descriptions in this specification. The constituent elements may also be identified by names different from the names in this specification. In addition, the constituent elements may also be described by expressions different from the descriptions in this specification.

[0016] In the following description, "suppress" is defined as, for example, preventing an event, action, or influence from occurring, or reducing the degree of an event, action, or influence. In addition, in the following description, "restrict" is defined as, for example, preventing movement or rotation, or allowing movement or rotation within a predetermined range and preventing movement or rotation beyond the predetermined range.

[0017] Figure 11 is an exemplary perspective view showing an exploded hard disk drive (HDD) 10 according to the present embodiment. The HDD 10 is an example of a disk device, and may also be called an electronic device, a storage device, an external storage device, or a magnetic disk device.

[0018] like Figure 1 As shown, HDD 10 includes housing 11, a plurality of magnetic disks 12, a spindle motor 13, a head stack assembly (HSA) 14, a voice coil motor (VCM) 15, a ramp load mechanism 16, and a printed circuit board (PCB) 17. In addition, HDD 10 is not limited to this example.

[0019] like Figure 1 As shown, in this specification, for convenience, the Z axis and the Z direction are defined. The Z axis is virtually set along the thickness of the HDD 10. The Z direction is a direction along the Z axis, including the +Z direction and the -Z direction. The +Z direction is the direction indicated by the arrow of the Z axis. The -Z direction is the opposite direction of the +Z direction.

[0020] The housing 11 includes a base 21 , an inner cover 22 , and an outer cover 23 . The base 21 is formed in a substantially rectangular box shape that is open in the +Z direction. The plurality of magnetic disks 12 , the spindle motor 13 , the HSA 14 , the VCM 15 , and the ramp loading mechanism 16 are accommodated inside the base 21 .

[0021] The base 21 has a bottom wall 25 and side walls 26. The bottom wall 25 is formed in a substantially rectangular (quadrilateral) plate shape arranged substantially orthogonal to the Z direction. The side walls 26 protrude from the edge of the bottom wall 25 in the substantially +Z direction and are formed in a substantially rectangular frame shape.

[0022] The inner cover 22 is attached to the end of the side wall 26 in the +Z direction by, for example, screws. The outer cover 23 covers the inner cover 22 and is attached to the end of the side wall 26 in the +Z direction by, for example, welding.

[0023] The inner cover 22 is provided with a vent 27. Furthermore, the outer cover 23 is provided with a vent 28. After the components are mounted inside the base 21 and the inner cover 22 and the outer cover 23 are mounted on the base 21, the air inside the housing 11 is extracted from the vents 27 and 28. Then, the inside of the housing 11 is filled with a gas different from the air.

[0024] The gas filled into the shell 11 is, for example, a low-density gas having a lower density than air, an inert gas having low reactivity, etc. For example, helium is filled into the shell 11. In addition, other fluids may be filled into the shell 11. In addition, the inside of the shell 11 may also be maintained at a vacuum, a low pressure close to a vacuum, or a negative pressure lower than the atmospheric pressure.

[0025] The vent 28 of the cover 23 is blocked by a seal 29. The seal 29 hermetically seals the vent 28, and prevents the fluid filling the interior of the housing 11 from leaking out of the vent 28.

[0026] The plurality of magnetic disks 12 are formed in a disk shape arranged so as to be perpendicular to the Z direction. A magnetic recording layer is provided on at least one of the upper surface and the lower surface of the magnetic disk 12. The plurality of magnetic disks 12 are stacked at intervals in the Z direction.

[0027] The spindle motor 13 supports a plurality of magnetic disks 12. The spindle motor 13 rotates the plurality of magnetic disks 12 about a central axis Ax1 of the spindle motor 13. The central axis Ax1 extends in the Z direction. The plurality of magnetic disks 12 are held by a hub of the spindle motor 13 by, for example, a clamp spring.

[0028] Figure 2 FIG. 1 is an illustrative top view showing the magnetic disk 12 and the HSA 14 according to the present embodiment. Figure 2 As shown, the HSA 14 is rotatably supported by a support shaft 31. The support shaft 31 is provided at a position away from the magnetic disk 12 in a direction perpendicular to the central axis Ax1. The support shaft 31 extends from the bottom wall 25 of the housing 11 in a substantially +Z direction, for example.

[0029] The HSA 14 is rotatable around a central axis Ax2. The central axis Ax2 is an example of a rotation axis and is a virtual axis extending in the Z direction. The central axis Ax2 is, for example, the center of rotation of the HSA 14 and is also the central axis of the support shaft 31.

[0030] In the following, for convenience, axial, radial, and circumferential directions are defined. The axial direction is the direction along the center axis Ax2. In the present embodiment, the center axis Ax2 extends along the Z direction. Therefore, the axial direction includes the +Z direction and the -Z direction. The radial direction is the direction orthogonal to the center axis Ax2, including multiple directions orthogonal to the center axis Ax2. The circumferential direction is the direction around the center axis Ax2, including the direction of clockwise rotation and the direction of counterclockwise rotation around the center axis Ax2.

[0031] The HSA 14 has a carriage 35 , a plurality of head gimbal assemblies (HGAs) 36 , and a flexible printed circuit board (FPC) 37 . The carriage 35 has an actuator block 41 and a plurality of arms 42 .

[0032] The actuator block 41 is rotatably supported on the support shaft 31 via a bearing, for example. Thus, the carriage 35 can rotate around the central axis Ax2. A plurality of arms 42 protrude radially from the actuator block 41. In addition, the carriage 35 may be divided, and the arm 42 may protrude from each of the plurality of actuator blocks 41.

[0033] In this specification, for convenience, an X-axis and a Y-axis are also defined. The X-axis, the Y-axis, and the Z-axis are orthogonal to each other. The Y-axis is provided along the arm 42. Furthermore, in this specification, an X direction and a Y direction are also defined. The X direction is a direction along the X-axis, including the +X direction indicated by the arrow of the X-axis and the -X direction which is the opposite direction of the arrow of the X-axis. The Y direction is a direction along the Y-axis, including the +Y direction indicated by the arrow of the Y-axis and the -Y direction which is the opposite direction of the arrow of the Y-axis.

[0034] The plurality of arms 42 protrude from the actuator block 41 in the +Y direction. Therefore, the Y direction is the long side direction of the arm 42. In addition, the Y direction is included in the radial direction. The X direction is the short side direction of the arm 42. The X direction and the Y direction change when the carriage 35 rotates around the central axis Ax2.

[0035] The arms 42 are arranged at intervals in the axial direction. Each arm 42 is formed in a plate shape that can enter a gap between two adjacent magnetic disks 12 among the magnetic disks 12. The arms 42 extend substantially in parallel.

[0036] The voice coil of the VCM 15 is mounted on the actuator block 41. The support shaft 31 is located between the arm 42 and the voice coil. The VCM 15 includes the voice coil, a pair of yokes, and a magnet provided on the yokes.

[0037] The plurality of HGAs 36 are attached to the ends in the +Y direction of corresponding ones of the plurality of arms 42. The HGAs 36 protrude substantially in the +Y direction from the corresponding arms 42. Thus, the plurality of HGAs 36 are arranged at intervals in the axial direction.

[0038] Figure 3 FIG. 2 is an illustrative top view showing a portion of the HGA 36 of the present embodiment. Figure 3 As shown, each of the plurality of HGAs 36 has a suspension 45, a slider 46, and two microactuators (MA) 47. The slider 46 may also be referred to as a magnetic head. Figure 3 The slider 46 is virtually indicated by a two-dot chain line.

[0039] like Figure 2 As shown, the suspension 45 includes a base plate 51, a load beam 52, and a flexure 53. The base plate 51 and the load beam 52 are made of, for example, stainless steel. The materials of the base plate 51 and the load beam 52 are not limited to this example.

[0040] The base plate 51 is formed in a plate shape and is attached to the end of the arm 42 in the +Y direction. Thus, the base plate 51 of the suspension 45 is attached to the carriage 35 .

[0041] The load beam 52 is formed in a plate shape thinner than the base plate 51. The load beam 52 is attached to the base plate 51 so as to protrude from the base plate 51 substantially in the +Y direction.

[0042] Figure 4 FIG. 2 is an exemplary cross-sectional view partially showing the magnetic disk 12 and the HGA 36 of the present embodiment. Figure 4 As shown, the load beam 52 has a bottom surface 52 a. The bottom surface 52 a is formed to be substantially flat. The bottom surface 52 a of each of the plurality of HGAs 36 faces the magnetic disk 12 corresponding to the HGA 36 .

[0043] The load beam 52 further includes a lift tab 55 and a dimple 56. The lift tab 55 is provided at the end of the load beam 52 in the +Y direction. The dimple 56 protrudes from the bottom surface 52a at a position closer to the central axis Ax2 than the lift tab 55. The dimple 56 is formed in a substantially hemispherical shape. In addition, the dimple 56 may be formed in other shapes.

[0044] Figure 5 FIG. 2 is an exemplary cross-sectional view showing a portion of the HGA 36 of the present embodiment. Figure 5 As shown, the flexible member 53 has a backing plate 61, a base layer 62, a cover layer 63 and a conductive layer 64. That is, the flexible member 53 is a type of FPC in which an insulating layer and a conductive layer are stacked. The backing plate 61 is an example of a metal plate. The base layer 62 is an example of a first insulating layer. The cover layer 63 is an example of a second insulating layer.

[0045] The backing plate 61 is made of metal such as stainless steel. The backing plate 61 has two surfaces 61a and 61b. The surface 61b is an example of an outer surface. The surface 61a is formed to be substantially flat and faces the bottom surface 52a of the load beam 52. The recess 56 is in contact with the surface 61a. The surface 61b is located on the opposite side of the surface 61a.

[0046] The base layer 62 and the cover layer 63 are made of an insulator such as polyimide (PI). The base layer 62 is provided on the surface 61b of the backing plate 61. In addition, the shape of the backing plate 61 and the shape of the base layer 62 are different from each other. That is, a part of the base layer 62 does not cover the surface 61b of the backing plate 61, but is provided at a position away from the backing plate 61. The cover layer 63 covers the base layer 62. Therefore, the base layer 62 is located between the backing plate 61 and the cover layer 63.

[0047] The conductive layer 64 is made of a conductor such as copper, for example. The conductive layer 64 has various conductor patterns such as a wiring pattern, a pad (pad / land), and a ground plane. The conductive layer 64 is located between the base layer 62 and the cover layer 63 .

[0048] like Figure 2 As shown, the flexible member 53 is formed in an elongated belt shape. The flexible member 53 has a universal joint portion 65 (elastic support portion). The universal joint portion 65 is provided at the end of the flexible member 53 in the +Y direction.

[0049] like Figure 3 As shown, the universal joint portion 65 has a frame portion 71, a mounting portion 72, and two connecting portions 73. The frame portion 71 and the connecting portion 73 have at least a portion of the backing plate 61. The mounting portion 72 has a portion of each of the backing plate 61, the base layer 62, the cover layer 63, and the conductive layer 64.

[0050] The frame 71 surrounds, for example, the mounting portion 72 and the connecting portion 73. The frame 71 is mounted on the bottom surface 52a of the load beam 52 by welding, for example. That is, the flexible member 53 is mounted on the load beam 52. The mounting portion 72 is located inside the frame 71. The two connecting portions 73 connect the frame 71 and the mounting portion 72.

[0051] like Figure 4 As shown, the mounting portion 72 is supported by the recess 56. Therefore, the mounting portion 72 can rotate about the apex of the recess 56. When the mounting portion 72 rotates, the connecting portion 73 is elastically deformed between the frame portion 71 and the mounting portion 72.

[0052] like Figure 3 As shown, in the mounting portion 72 , the conductive layer 64 has a plurality of pads 75 . The plurality of pads 75 are arranged in the X direction. Each of the plurality of pads 75 is exposed to the outside of the flexible member 53 through a hole provided in the cover layer 63 .

[0053] The mounting portion 72 is provided with an exposure hole 76. The exposure hole 76 penetrates the base layer 62, the cover layer 63, and the conductive layer 64. Therefore, the surface 61b of the backing plate 61 is exposed to the outside of the flexible member 53 through the exposure hole 76. The exposure hole 76 is located between the pad 75 and the central axis Ax2.

[0054] like Figure 2 As shown, the end of the flexible member 53 in the −Y direction is connected to one end of the FPC 37 on the actuator block 41 , for example. The other end of the FPC 37 is connected to a connector provided on the bottom wall 25 .

[0055] like Figure 3As shown, the slider 46 is mounted on the mounting portion 72 of the universal joint portion 65. The slider 46 is located between the pad 75 and the central axis Ax2, covering the exposed hole 76. Figure 4 As shown, the slider 46 has a slider body 81 and a head element 82 .

[0056] The slider body 81 is formed in a substantially rectangular block shape. The shape of the slider body 81 is not limited to this example. The slider body 81 has a mounting surface 81a, a floating surface 81b, a trailing end 81c, and a leading end 81d. The floating surface 81b may also be referred to as an air bearing surface (ABS).

[0057] like Figure 5 As shown, the mounting surface 81a faces the flexible member 53. The mounting surface 81a faces the surface 61b of the backing plate 61 through the exposure hole 76. The floating surface 81b is located on the opposite side of the mounting surface 81a. The floating surface 81b is formed to be substantially flat. In addition, a hole, a recess or a notch may be provided on the floating surface 81b. The outflow end 81c is the end of the slider body 81 in the +Y direction. Figure 4 As shown, the inflow end 81d is an end portion of the slider body 81 in the -Y direction.

[0058] The head element 82 is mounted on the slider body 81 or built in the slider body 81. The head element 82 is provided at the outflow end 81c of the slider body 81. The head element 82 records and reproduces information on a corresponding one of the plurality of magnetic disks 12. That is, the slider 46 reads and writes information on the magnetic disk 12.

[0059] The head element 82 includes, for example, a write element for recording information on the magnetic disk 12 and a read element for reproducing information from the magnetic disk 12. The magnetic recording layer of the magnetic disk 12 is magnetized in a predetermined direction by the magnetic field generated by the write element, and information is recorded. The information recorded on the magnetic disk 12 is read out by the read element. At least when the head element 82 reads and writes information on the magnetic disk 12, the floating surface 81b faces the magnetic disk 12 with a small gap therebetween.

[0060] The electrodes of the head element 82 of the slider 46 are bonded to the plurality of pads 75 by, for example, solder S. Thus, the FPC 37 is electrically connected to the head element 82 via the flexible material 53 .

[0061] The slider 46 is supported by the recess 56 via, for example, the mounting portion 72. The slider 46 and the mounting portion 72 are integrally rotatable about the apex of the recess 56 with respect to the frame portion 71.

[0062] Figure 3The MA47 is, for example, a bulk piezoelectric element. In addition, the MA47 may also be a bulk laminated or thin film piezoelectric element. The two MA47 are each mounted on the mounting portion 72. The MA47 expands and contracts according to the applied voltage. As the two MA47 expand and contract, the mounting portion 72 is elastically deformed, and the slider 46 rotates.

[0063] Figure 1 The VCM 15 shown rotates the carriage 35 around the central axis Ax2. The HGA 36 mounted on the arm 42 also rotates due to the rotation of the carriage 35. That is, the suspension 45 including the base plate 51, the load beam 52, and the flexible member 53 and the slider 46 rotate around the central axis Ax2. The carriage 35 rotates around the central axis Ax2, so that the slider 46 moves to a desired position on the magnetic disk 12.

[0064] When the slider 46 moves to the outermost periphery of the magnetic disk 12 by the rotation of the carriage 35 caused by the VCM 15, the ramp load mechanism 16 holds the HGA 36. When the HGA 36 is held by the ramp load mechanism 16, the slider 46 leaves the magnetic disk 12.

[0065] The PCB 17 is, for example, a rigid substrate such as a glass epoxy substrate, a multi-layer substrate, or a build-up substrate, etc. The PCB 17 is disposed outside the housing 11 and mounted on the bottom wall 25 of the base 21 .

[0066] Various electronic components such as a relay connector connected to the FPC 37 , an interface (I / F) connector connected to a host computer, and a controller for controlling the operation of the HDD 10 are mounted on the PCB 17 . The relay connector is electrically connected to the FPC 37 via a connector provided on the bottom wall 25 .

[0067] PCB17 is electrically connected to slider 46 and MA47 via FPC37 and flexible member 53. The controller of PCB17 enables head element 82 of slider 46 to read and write information to magnetic disk 12. Furthermore, the controller of PCB17 enables MA47 to expand and contract to adjust the position of head element 82.

[0068] Figure 6 FIG. 5 is an illustrative top view showing a portion of the flexible member 53 of the present embodiment. Figure 6 As shown, the flexible member 53 further has a PI pattern 90. The PI pattern 90 is an example of an insulator. In addition, the material of the insulator is not limited to PI.

[0069] In the present embodiment, the PI pattern 90 is formed as a part of the base layer 62 and the cover layer 63 when the flexible member 53 is manufactured. That is, when the base layer 62 is formed, a part of the PI pattern 60 is formed simultaneously with the other parts of the base layer 62. Furthermore, when the cover layer 63 is formed, the other part of the PI pattern 60 is formed simultaneously with the other parts of the cover layer 63.

[0070] As described above, the PI pattern 90 includes at least one of a portion of the base layer 62 and a portion of the cover layer 63. In addition, the PI pattern 90 is made of PI like the base layer 62 and the cover layer 63. In this way, the PI pattern 90 is included in at least one of the base layer 62 and the cover layer 63. In addition, the PI pattern 90 may be different from the base layer 62 and the cover layer 63.

[0071] The PI pattern 90 is provided on the surface 61b of the backing plate 61 exposed through the exposure hole 76. In other words, the PI pattern 90 protrudes from the surface 61b of the backing plate 61. The PI pattern 90 is separated from the other parts of the base layer 62 and the other parts of the cover layer 63. In addition, the PI pattern 90 may be formed integrally with at least one of the other parts of the base layer 62 and the other parts of the cover layer 63.

[0072] The PI pattern 90 has two first walls 91, a second wall 92, a third wall 93, a plurality of fourth walls 94, a platform 95, and a plurality of protrusions 96. The PI pattern 90 is not limited to this example. The two first walls 91 and the plurality of fourth walls are examples of the plurality of walls. The platform 95 is an example of the sixth wall.

[0073] The two first walls 91 extend toward the central axis Ax2 in a manner close to each other. In the present embodiment, the end 91a of the first wall 91 on one side in the -Y direction and the end 91a of the first wall 91 on the other side in the -Y direction are separated from each other in the X direction. In addition, the end 91a of the two first walls 91 may be connected to each other. The end 91b of the first wall 91 on one side in the +Y direction and the end 91b of the first wall 91 on the other side in the +Y direction are separated from each other in the X direction. The distance between the two first walls 91 at the end 91a is shorter than the distance between the two first walls 91 at the end 91b. That is, the two first walls 91 are formed in a roughly V-shape.

[0074] In the present embodiment, the two first walls 91 extend in a straight line. However, the two first walls 91 may extend in a curved line, or may be bent at least at one point. The two first walls 91 may extend in a partially substantially parallel manner.

[0075] In this embodiment, each of the two first walls 91 has a plurality of partition walls 99. The plurality of partition walls 99 is an example of a plurality of fifth walls and a plurality of walls. In each first wall 91, the plurality of partition walls 99 are separated from each other in the direction in which the first wall 91 extends. In addition, the first wall 911 may not be divided into a plurality of partition walls 99, but may extend linearly between the end 91a and the end 91b.

[0076] The second wall 92 is disposed at a position farther from the central axis Ax2 than the two first walls 91. The second wall 92 extends substantially in the X direction across the center Cn of the PI pattern 90 in the circumferential direction.

[0077] The center Cn is substantially equal to the center of the PI pattern 90 in the X direction. In the present embodiment, the center Cn is substantially equal to the center of the load beam 52 in the X direction and substantially equal to the center of the gimbal portion 65 in the X direction.

[0078] The second wall 92 extends between the vicinity of the end 91b of one of the first walls 91 and the vicinity of the end 91b of the other first wall 91. However, the second wall 92 is separated from the two first walls 91. A gap G is provided between the end 92a of the second wall 92 and the end 91b of the first wall 91 in the X direction. That is, two gaps G are provided in the PI pattern 90.

[0079] The two first walls 91 and the second wall 92 are configured in a substantially triangular shape. Therefore, a substantially triangular region Ri is provided inside the two first walls 91 and the second wall 92. The region Ri is surrounded by the two first walls 91 and the second wall 92 and is a part of the surface 61b of the backing plate 61. The region Ri is connected to the outside of the region Ri through the gap G.

[0080] The third wall 93 is provided in the region Ri. Therefore, the third wall 93 is located between the two first walls 91 and the second wall 92. The third wall 93 is at least partially located at the center Cn. In the present embodiment, the third wall 93 crosses the center Cn and extends substantially in the X direction. In addition, the third wall 93 is not limited to this example, and for example, may also extend substantially in the Y direction at the center Cn.

[0081] In the circumferential direction, the third wall 93 is shorter than the second wall 92. In other words, in the X direction, the third wall 93 is shorter than the second wall 92. In the X direction, both ends 93a of the third wall 93 are located between both ends 92a of the second wall 92.

[0082] The third wall 93 is located near the second wall 92. Therefore, the distance between the second wall 92 and the third wall 93 is shorter than the distance between each of the two first walls 91 and the third wall 93. The third wall 93 may be connected to the second wall 92.

[0083] The plurality of fourth walls 94 are provided in the region Ri and are separated from the two first walls 91, the second wall 92, and the third wall 93. The plurality of fourth walls 94 are separated from each other. The plurality of fourth walls 94 are each located near the two first walls 91 and extend along a corresponding one of the two first walls 91.

[0084] A gap C1 is provided between two adjacent fourth walls 94 among the plurality of fourth walls 94. Furthermore, a gap C1 is also provided between each of the plurality of fourth walls 94 and a corresponding one of the two first walls 91. In addition, a gap C1 is also provided between two adjacent partition walls 99 among the plurality of partition walls 99.

[0085] The gap C1 is relatively narrow and is bent at multiple locations. Therefore, when a fluid such as an adhesive before curing flows into the gap C1, resistance is generated in the flow of the fluid, and the passage of the fluid through the gap C1 is restricted. That is, the first wall 91 and the fourth wall 94 form a labyrinth seal Ls by forming the gap C1. In other words, the PI pattern 90 has a labyrinth seal Ls that restricts the passage of a fluid such as an adhesive before curing by the gap C1 between the two first walls 91, the plurality of fourth walls 94, and the plurality of dividing walls 99.

[0086] The stage 95 is provided in the region Ri, away from the second wall 92 and the third wall 93 in the -Y direction. Therefore, the stage 95 is located between the two first walls 91. Figure 5 As shown, in the Z direction substantially perpendicular to the surface 61 b ​​of the backing plate 61 , the thickness of the stage 95 is smaller than the thickness of each of the two first walls 91 and smaller than the thickness of the second wall 92 .

[0087] like Figure 6 As shown, the plurality of protrusions 96 are provided in the region Ri and are separated from the second wall 92 in the -Y direction. Therefore, the plurality of protrusions 96 are located between the two first walls 91. Each of the protrusions 96 protrudes from the surface 61b of the backing plate 61. In addition, in the present embodiment, the plurality of protrusions 96 are formed integrally with the stage 95.

[0088] The plurality of protrusions 96 are separated from each other and from the two first walls 91, the second wall 92, and the plurality of fourth walls 94. In the present embodiment, each of the plurality of protrusions 96 is cross-shaped. In addition, the shape of the protrusion 96 is not limited to this example, and may be, for example, hemispherical, linear, or other shapes. In addition, the protrusion 96 is not limited to this example.

[0089] like Figure 4 As shown, each of the plurality of HGAs 36 further includes two adhesives 101 and 102 . The adhesive 101 is an example of a first adhesive and an adhesive. The adhesive 102 is an example of a second adhesive. The adhesives 101 and 102 attach the slider 46 to the flexure 53 of the suspension 45 .

[0090] like Figure 5 As shown, the adhesive 101 is attached to the surface 61b of the backing plate 61 exposed through the exposure hole 76, and is attached to the mounting surface 81a of the slider body 81. Thus, the adhesive 101 bonds the slider 46 to the surface 61b of the backing plate 61. At least a portion of the adhesive 101 is interposed between the surface 61b of the backing plate 61 and the mounting surface 81a of the slider body 81.

[0091] like Figure 6 As shown, the adhesive 101 is attached to the region Ri. Therefore, the PI pattern 90 surrounds at least a portion of the adhesive 101. Specifically, the two first walls 91 and the second wall 92 arranged in a substantially triangular shape surround at least a portion of the adhesive 101.

[0092] The adhesive 101 spreads in a substantially V-shape along the two first walls 91 , the second wall 92 , and the third wall 93 . For example, the adhesive 101 includes a first portion 105 , a second portion 106 , and a third portion 107 .

[0093] The first portion 105 is located between the two first walls 91. In the present embodiment, the first portion 105 is attached to at least one of the two first walls 91, to at least one of the plurality of fourth walls 94, to the stage 95, and to the plurality of protrusions 96. The first portion 105 covers the stage 95 and the plurality of protrusions 96.

[0094] The first portion 105 is partially interposed between the base 95 and the mounting surface 81a of the slider body 81. In addition, the first portion 105 is partially interposed between the protrusions 96 and the mounting surface 81a of the slider body 81. Therefore, the first portion 105 mounts the slider 46 to the base 95 and the plurality of protrusions 96 of the flexible member 53.

[0095] The second portion 106 protrudes from the first portion 105 in an oblique direction between the +X direction and the +Y direction. Therefore, the second portion 106 is located between one of the two first walls 91 and the third wall 93. A portion of the second portion 106 may protrude outside the region Ri through the gap G.

[0096] The third portion 107 protrudes from the first portion 105 in an oblique direction between the -X direction and the +Y direction. Therefore, the third portion 107 is located between the other of the two first walls 91 and the third wall 93. A portion of the third portion 107 may protrude outside the region Ri through the gap G.

[0097] The third wall 93 is located between the second portion 106 and the third portion 107. In other words, the second portion 106 and the third portion 107 are separated from each other in the X direction by the third wall 93.

[0098] The adhesive 101 is provided with a recess 108 that opens toward the second wall 92. The recess 108 is located between the second portion 106 and the third portion 107. In addition, a part of the adhesive 101 may cover the third wall 93 to connect the second portion 106 and the third portion 107.

[0099] According to another description, the adhesive 101 has two extensions 109. The two extensions 109 extend toward the central axis Ax2 so as to approach each other. The two extensions 109 each have an end 109a in the -Y direction and an end 109b in the +Y direction. The end 109a is an example of a first end. The end 109b is an example of a second end.

[0100] The end 109a of one of the two extension parts 109 is connected to the end 109a of the other of the two extension parts 109. In addition, the end 109b of one of the two extension parts 109 is separated from the end 109b of the other of the two extension parts 109 in the circumferential direction. In other words, the end 109b of the two extension parts 109 is separated from each other in the X direction. In this way, the two extension parts 109 are expanded in a substantially V-shape.

[0101] The third wall 93 is located between the end 109b of one of the two extension portions 109 and the other end 109b of the two extension portions 109. That is, the end 109b of one of the two extension portions 109 and the other end 109b of the two extension portions 109 are separated from each other in the X direction by the third wall 93.

[0102] The adhesive 101 is away from the plurality of pads 75 in the -Y direction. In the present embodiment, the second wall 92 is located between the plurality of pads 75 and the adhesive 101. In addition, the third wall 93 is also located between the plurality of pads 75 and the adhesive 101. In addition, a portion of the adhesive 101 may be located closer to the pads 75 than the second wall 92 and the third wall 93.

[0103] like Figure 4 As shown, the adhesive 102 is away from the PI pattern 90 and the adhesive 101 in the −Y direction. Therefore, the adhesive 102 is closer to the central axis Ax2 than the PI pattern 90 and the adhesive 101.

[0104] Adhesive 102 is attached to mounting portion 72 and to mounting surface 81a of slider body 81. Thus, two adhesives 101 and 102 respectively adhere slider 46 to mounting portion 72 of flexible member 53. The volume of adhesive 101 is larger than that of adhesive 102. Adhesive 102 may be omitted.

[0105] The following is a partial example of a method for mounting the slider 46. The method for mounting the slider 46 is not limited to the following method, and other methods may be used. First, for example, a dispenser applies an adhesive 101 to the surface 61b of the backing plate 61 exposed through the exposure hole 76. Figure 6 The adhesive 101 applied to the backing plate 61 is virtually indicated by a two-dot chain line. The dispenser applies the adhesive 102 to the mounting portion 72. The adhesives 101 and 102 may also be applied to the mounting surface 81a of the slider body 81.

[0106] Next, for example, a mounter places the slider 46 on the flexible member 53 . As a result, the adhesives 101 and 102 are attached to the mounting surface 81 a of the slider body 81 .

[0107] The assembly machine presses the slider 46 toward the flexible member 53. As a result, a portion of the adhesive 101 is compressed between the surface 61b of the backing plate 61 and the mounting surface 81a of the slider body 81. Furthermore, another portion of the adhesive 101 is compressed between the stage 95 or the protrusion 96 and the mounting surface 81a. The adhesive 102 is compressed between the mounting portion 72 and the mounting surface 81a. The adhesives 101 and 102 spread along the mounting surface 81a.

[0108] A portion of the adhesive 101 spreads toward the plurality of pads 75. However, the third wall 93 is located between the adhesive 101 and the pads 75. Therefore, when the adhesive 101 reaches the third wall 93, the third wall 93 blocks or slows down the flow of the adhesive 101 toward the pads 75.

[0109] A portion of the adhesive 101 spreads in the X direction along the third wall 93. In addition, another portion of the adhesive 101 spreads toward the gap G. However, the second wall 92 is located between the adhesive 101 and the pad 75. Therefore, when the adhesive 101 reaches the second wall 92, the second wall 92 blocks or slows down the flow of the adhesive 101 toward the pad 75.

[0110] The adhesive 101 is applied to the center Cn of the PI pattern 90 in the circumferential direction. Therefore, a portion of the adhesive 101 located at the center Cn approaches the pad 75 earlier than other portions. However, the third wall 93 blocks or slows down the flow of the adhesive 101 along the center Cn. Therefore, the third wall 93 inhibits the adhesive 101 from reaching the pad 75 along the center Cn.

[0111] A portion of the adhesive 101 may reach the gap G or flow out of the PI pattern 90 from the gap G. The volume of the adhesive 101 is set so that even if the adhesive 101 flows out of the PI pattern 90 from the gap G, the adhesive 101 is prevented from reaching the pad 75 .

[0112] The space between the stage 95 and the mounting surface 81a of the slider body 81 is narrower than the space between the surface 61b of the backing plate 61 and the mounting surface 81a. Therefore, a part of the adhesive 101 attached to the stage 95 flows to the relatively wide space between the surface 61b and the mounting surface 81a. In other words, at least a part of the adhesive 101 attached to the stage 95 flows toward the plurality of pads 75. As described above, the flow of the adhesive 101 is blocked or slowed down by the third wall 93 and the second wall 92.

[0113] The other part of the adhesive 101 attached to the stage 95 flows toward the central axis Ax2. However, the plurality of fourth walls 94 are located between the adhesive 101 and the central axis Ax2. Therefore, when the adhesive 101 reaches the fourth wall 94, the fourth wall 94 blocks or slows down the flow of the adhesive 101 toward the central axis Ax2.

[0114] A part of the adhesive 101 flows into the gap C1. In this case, it becomes difficult for the adhesive 101 in the gap C1 to pass through the gap C1. That is, the labyrinth seal Ls blocks or slows down the flow of the adhesive 101 before curing as a fluid.

[0115] The adhesive 101 attached to the plurality of protrusions 96 tends to remain on the surface of the protrusions 96 due to surface tension, for example. In addition, a portion of the cross-shaped protrusion 96 extends in a direction intersecting the flow of the adhesive 101. Therefore, the protrusion 96 blocks or slows down the flow of the adhesive 101.

[0116] As described above, the PI pattern 90 restricts the adhesive 101 from flowing toward the pad 75 and the central axis Ax2. On the other hand, the PI pattern 90 allows the adhesive 101 to flow toward the two gaps G. Therefore, more of the adhesive 101 spreads in the vicinity of the second wall 92 and the third wall 93 substantially in the X direction.

[0117] Next, a plurality of solders S (solder paste) are applied to the electrodes of the head element 82 and the pads 75 by, for example, a dispenser. Next, by heating the slider 46 and the flexible member 53, the adhesives 101 and 102 are hardened, and the solder S bonds the electrodes of the head element 82 to the pads 75. As described above, the slider 46 is attached to the flexible member 53.

[0118] In the HDD 10 according to the present embodiment described above, the slider 46 is attached to the suspension 45 by the adhesive 101. The flexible member 53 of the suspension 45 includes a backing plate 61, a surface 61b of the backing plate 61 to which the adhesive 101 is attached, and a PI pattern 90 provided on the surface 61b and surrounding at least a portion of the adhesive 101. The PI pattern 90 includes two first walls 91, a second wall 92, and a third wall 93. The two first walls 91 extend toward the center axis Ax2 of the carriage 35 so as to approach each other. The second wall 92 extends across the center Cn of the PI pattern 90 in the circumferential direction around the center axis Ax2 at a position farther from the center axis Ax2 than the two first walls 91, and is separated from the two first walls 91. The third wall 93 is at least partially located at the center Cn of the PI pattern 90 in the circumferential direction, located between the two first walls 91 and the second wall 92, and is shorter than the second wall 92 in the circumferential direction. The distance between the second wall 92 and the third wall 93 is shorter than the distance between each of the two first walls 91 and the third wall 93 .

[0119] When the slider 46 is attached to the surface 61b of the backing plate 61 by the adhesive 101, the adhesive 101 is compressed and spread between the slider 46 and the surface 61b. The PI pattern 90 restricts the expansion of the adhesive 101. That is, the PI pattern 90 suppresses the adhesive 101 from expanding beyond the PI pattern 90. Generally speaking, when the adhesive 101 that fixes the slider 46 expands greatly, the slider 46 is firmly attached to the flexible member 53, but the resonance characteristics (for example, frequency response) of the slider 46 deteriorate. The HDD 10 of this embodiment can suppress the deterioration of the resonance characteristics of the slider 46 by restricting the expansion of the adhesive 101. Furthermore, by attaching the adhesive 101 to the PI pattern 90, the bonding area between the adhesive 101 and the flexible member 53 is increased. Therefore, the slider 46 can be more firmly attached to the flexible member 53, and can be suppressed from falling off the flexible member 53. According to this, the HDD 10 can improve the durability of the slider 46 against impact. Furthermore, the HDD 10 can improve the yield rate by facilitating the attachment of the slider 46 during the manufacturing process.

[0120] Since the space between the two first walls 91 narrows toward the central axis Ax2, the adhesive 101 flows toward the second wall 92. Generally speaking, when the adhesive 101 fixing the slider 46 is more present near the outflow end 81c of the slider 46, the resonance characteristics of the slider 46 are improved. The HDD 10 of this embodiment can suppress the deterioration of the resonance characteristics of the slider 46 by allowing the adhesive 101 to flow toward the outflow end 81c of the slider 46.

[0121] The portion of the adhesive 101 at the center Cn in the circumferential direction approaches the second wall 92 earlier than the portions at the two ends in the circumferential direction. However, the third wall 93 located at the center Cn of the PI pattern 90 in the circumferential direction hinders the flow of the adhesive 101. Therefore, the adhesive 101 is branched by the third wall 93 and flows toward the gap G between the first wall 91 and the second wall 92. That is, the HDD 10 of the present embodiment can suppress the portion of the adhesive 101 at the center Cn in the circumferential direction from spreading beyond the second wall 92 and the third wall 93. Through the above, the HDD 10 of the present embodiment can suppress the deterioration of the resonance characteristics of the slider 46.

[0122] In addition, the second wall 92 is separated from the two first walls 91, and a gap G is provided in the PI pattern 90. Therefore, the adhesive 101 can flow out from the space inside the PI pattern 90. Accordingly, the HDD 10 can suppress the deviation of the distance between the surface 61b of the backing plate 61 and the slider 46 caused by the deviation (fluctuation) of the amount of the adhesive 101.

[0123] The PI pattern 90 has a plurality of fourth walls 94 and a labyrinth seal Ls. The plurality of fourth walls 94 are separated from the two first walls 91, the second wall 92, and the third wall 93 and are separated from each other. The labyrinth seal Ls restricts the passage of an adhesive (for example, an adhesive 101 before curing) through the gaps Cl between the two first walls 91 and the plurality of fourth walls 94. As a result, the adhesive 101 becomes easy to flow toward the second wall 92. The HDD 10 of the present embodiment can suppress the deterioration of the resonance characteristics of the slider 46 by allowing the adhesive 101 to flow toward the outflow end 81c of the slider 46.

[0124] The two first walls 91 each have a plurality of partition walls 99 separated from each other. The labyrinth seal Ls restricts the passage of the adhesive through the gaps C1 between the two first walls 91, the plurality of fourth walls 94, and the plurality of partition walls 99. Thus, the adhesive 101 easily flows toward the second wall 92.

[0125] The flexible member 53 has a plurality of pads 75 bonded to the slider 46. The second wall 92 is located between the adhesive 101 and the plurality of pads 75. Thus, the second wall 92 can prevent the adhesive 101 from reaching the plurality of pads 75.

[0126] The third wall 93 is located between the adhesive 101 and the plurality of pads 75. The third wall 93 blocks the flow of the adhesive 101 and branches the adhesive 101. Thus, the third wall 93 can prevent the portion of the adhesive 101 at the center Cn in the circumferential direction from spreading beyond the second wall 92.

[0127] The adhesive 101 includes a first portion 105, a second portion 106, and a third portion 107. The first portion 105 is located between the two first walls 91. The second portion 106 protrudes from the first portion 105 and is located between one of the two first walls 91 and the third wall 93. The third portion 107 protrudes from the first portion 105 and is located between the other of the two first walls 91 and the third wall 93. The third wall 93 is located between the second portion 106 and the third portion 107. That is, the PI pattern 90 forms the adhesive 101 in a substantially V-shape that gradually tapers toward the central axis Ax2. Thus, the PI pattern 90 can arrange more of the adhesive 101 near the outflow end 81c of the slider 46, and can suppress the adhesive 101 from spreading beyond the second wall 92.

[0128] Adhesive 102 is separated from adhesive 101 and PI pattern 90 and is closer to central axis Ax2 than adhesive 101 and PI pattern 90 to attach slider 46 to suspension 45. Thus, slider 46 can be more firmly attached to suspension 45, and can be prevented from falling off flexure 53.

[0129] The volume of the adhesive 101 is larger than the volume of the adhesive 102 . As a result, the expansion of the adhesive 102 becomes relatively small. Therefore, the adhesive 102 can suppress the deterioration of the resonance characteristics of the slider 46 .

[0130] The PI pattern 90 has a plurality of protrusions 96. The plurality of protrusions 96 protrude from the surface 61b between the two first walls 91. Thus, the plurality of protrusions 96 restrict the adhesive 101 from flowing toward the two first walls 91. Therefore, the adhesive 101 easily flows toward the second wall 92.

[0131] Each of the plurality of protrusions 96 is cross-shaped. Therefore, at least a portion of the protrusion 96 extends in a direction intersecting the flow of the adhesive 101. Accordingly, the plurality of protrusions 96 can more effectively restrict the flow of the adhesive 101.

[0132] The PI pattern 90 has a stage 95. The stage 95 is located between the two first walls 91 and is separated from the second wall 92. In the Z direction substantially perpendicular to the surface 61b, the thickness of the stage 95 is smaller than the thickness of each of the two first walls 91. That is, the stage 95 makes the space between the stage 95 and the slider 46 narrower than the space between the surface 61b and the slider 46. As a result, the adhesive 101 becomes easy to flow toward the second wall 92.

[0133] The flexible member 53 includes a base layer 62 provided on the surface 61b, a cover layer 63 covering the base layer 62, and a conductive layer 64 located between the base layer 62 and the cover layer 63. The PI pattern 90 is included in at least one of the base layer 62 and the cover layer 63. Thus, the PI pattern 90 is formed in at least one of the process of forming the base layer 62 and the process of forming the cover layer 63. Therefore, the HDD 10 of the present embodiment can suppress the increase in the number of manufacturing processes and can be easily manufactured.

[0134] The adhesive 101 attaches the slider 46 to the suspension 45. The flexible member 53 of the suspension 45 has a backing plate 61, a surface 61b of the backing plate 61 to which the adhesive 101 is attached, and a PI pattern 90 provided on the surface 61b and surrounding at least a portion of the adhesive 101. The adhesive 101 has two extensions 109 extending toward the center axis Ax2 of the slide 35 in a manner close to each other. The two extensions 109 each have an end 109a and an end 109b farther from the center axis Ax2 than the end 109a. The end 109a of one of the two extensions 109 is connected to the end 109a of the other. The end 109b of one of the two extensions 109 is separated from the end 109b of the other in the circumferential direction around the center axis Ax2.

[0135] The adhesive 101 is formed into a generally V-shape that tapers toward the central axis Ax2. As a result, more of the adhesive 101 is disposed near the outflow end 81c of the slider 46. In addition, the PI pattern 90 restricts the expansion of the adhesive 101. Through the above, the HDD 10 of the present embodiment can suppress the deterioration of the resonance characteristics of the slider 46. Furthermore, by attaching the adhesive 101 to the PI pattern 90, the slider 46 can be more firmly attached to the flexible member 53, and can be suppressed from falling off the flexible member 53.

[0136] A portion of the PI pattern 90 (third wall 93) is located between the end 109b of one of the two extension portions 109 and the end 109b of the other. That is, the PI pattern 90 forms the adhesive 101 into a substantially V-shape that gradually tapers toward the central axis Ax2. Thus, the PI pattern 90 can arrange more of the adhesive 101 near the outflow end of the slider 46, and can suppress the adhesive 101 from spreading beyond the second wall 92.

[0137] The PI pattern 90 includes a plurality of walls (a first wall 91, a fourth wall 94, and a partition wall 99) separated from each other and a labyrinth seal Ls. The labyrinth seal Ls limits the passage of the adhesive through the gaps Cl between the plurality of walls. Thus, the HDD 10 can guide the expansion of the adhesive 101 in a desired direction. In addition, the direction in which the labyrinth seal Ls guides the expansion of the adhesive 101 is not limited to the direction of the present embodiment.

[0138] Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention, and are included in the invention described in the claims and the scope of their equivalents.

Claims

1. A disk device comprising: disk; A slider configured to read and write information to the disk; a carriage configured to rotate about a rotation axis; a suspension mounted on the carriage; and a first adhesive for mounting the slider on the suspension, The suspension has a base plate mounted on the slide, a load beam mounted on the base plate, and a flexible member mounted on the load beam. The flexible member includes a metal plate, an outer surface of the metal plate to which the first adhesive is attached, and an insulator provided on the outer surface and surrounding at least a portion of the first adhesive. The insulator has two first walls, a second wall, and a third wall, the two first walls extending toward the rotation axis in a manner close to each other, the second wall extending across the center of the insulator in the circumferential direction around the rotation axis at a position farther from the rotation axis than the two first walls and separated from the two first walls, and the third wall at least partially located in the center of the insulator in the circumferential direction and between the two first walls and the second wall and shorter than the second wall in the circumferential direction, The distance between the second wall and the third wall is shorter than the distance between each of the two first walls and the third wall.

2. The disk device according to claim 1, The insulator has a plurality of fourth walls and a labyrinth seal, wherein the plurality of fourth walls are separated from the two first walls, the second wall and the third wall and are separated from each other, and the labyrinth seal is configured to restrict passage of adhesive through the gaps between the two first walls and the plurality of fourth walls.

3. The disk device according to claim 2, The two first walls each have a plurality of fifth walls separated from each other, The labyrinth seal is configured to restrict passage of an adhesive by spaces between the two first walls, the plurality of fourth walls, and the plurality of fifth walls.

4. The disk device according to claim 1, The flexible member has a plurality of pads engaged with the slider, The second wall is located between the first adhesive and the plurality of pads.

5. The disk device according to claim 4, The third wall is located between the first adhesive and the plurality of pads.

6. The disk device according to claim 1, The first adhesive comprises a first portion, a second portion, and a third portion, wherein the first portion is located between the two first walls, the second portion protrudes from the first portion and is located between one of the two first walls and the third wall, and the third portion protrudes from the first portion and is located between the other of the two first walls and the third wall. The third wall is located between the second portion and the third portion.

7. The disk device according to claim 1, The disk device further includes a second adhesive that is separate from the first adhesive and the insulator and is closer to the rotation axis than the first adhesive and the insulator, and mounts the slider to the suspension.

8. The disk device according to claim 7, The volume of the first adhesive is larger than the volume of the second adhesive.

9. The disk device according to claim 1, The insulator has a plurality of protrusions protruding from the outer surface between the two first walls.

10. The disk device according to claim 9, Each of the plurality of protrusions is cross-shaped.

11. The disk device according to claim 1, The insulator has a sixth wall located between the two first walls and separated from the second wall. The thickness of the sixth wall in a direction perpendicular to the outer surface is smaller than the thickness of each of the two first walls.

12. The disk device according to claim 1, The flexible member comprises a first insulating layer disposed on the outer surface, a second insulating layer covering the first insulating layer, and a conductive layer located between the first insulating layer and the second insulating layer. The insulator is included in at least one of the first insulating layer and the second insulating layer.

13. A disk device comprising: disk; A slider configured to read and write information to the disk; a carriage configured to rotate about a rotation axis; a suspension mounted on the carriage; and Adhesive, mounting the slider to the suspension, The suspension has a base plate mounted on the slide, a load beam mounted on the base plate, and a flexible member mounted on the load beam. The flexible member comprises a metal plate, an outer surface of the metal plate to which the adhesive is attached, and an insulator disposed on the outer surface and surrounding at least a portion of the adhesive. The adhesive has two extensions extending toward the rotation axis in a manner close to each other, Each of the two extending portions has a first end and a second end that is farther away from the rotation axis than the first end. The first end of one of the two extending portions and the first end of the other of the two extending portions are connected to each other, The second end portion of one of the two extending portions and the second end portion of the other of the two extending portions are separated from each other in a circumferential direction around the rotation axis.

14. The disk device according to claim 13, A portion of the insulator is located between the second end portion of one of the two extending portions and the second end portion of the other of the two extending portions.

15. A disk device comprising: disk; A slider configured to read and write information to the disk; a carriage configured to rotate about a rotation axis; a suspension mounted on the carriage; and Adhesive, mounting the slider to the suspension, The suspension has a base plate mounted on the slide, a load beam mounted on the base plate, and a flexible member mounted on the load beam. The flexible member comprises a metal plate, an outer surface of the metal plate to which the adhesive is attached, and an insulator disposed on the outer surface and surrounding at least a portion of the adhesive. The insulator has a plurality of walls separated from each other, and a labyrinth seal configured to restrict passage of an adhesive through spaces between the plurality of walls.

Images