Suspension assembly and disk device

Abstract

To provide a suspension assembly that improves connection reliability of connection terminals.SOLUTION: In a hard disk drive, a head gimbal assembly, which is a suspension assembly, includes a wiring member 56. A tail connection portion 66 of the wiring member has a base layer 91, a cover layer 92, and a conductive layer 93 arranged between the base layer and the cover layer. A cover groove 105 is provided on the cover layer. The conductive layer 93 has first wiring 111, second wiring 112, and a connection terminal 67 extending between the first wiring and the second wiring across the cover groove. A base has a first base 121 covering the first wiring 1, a second base 122 covering the second wiring 112, a pair of first protrusions 127 protruding from the first base 121 and partially covering the connection terminal 67, and a pair of second protrusions 128 protruding from the second base 122, partially covering the connection terminal 67, and spaced apart from the pair of first protrusions 127.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a suspension assembly and a disk drive device. [Background technology]

[0002] A disk device such as a hard disk drive (HDD) includes, for example, a controller, a suspension assembly, a flexible printed circuit (FPC), and a magnetic disk. The controller controls the magnetic head of the suspension assembly via the FPC to read and write information from and to the magnetic disk.

[0003] The suspension assembly includes a wiring member that connects the FPC and the magnetic head. The wiring member has a conductive layer disposed between two insulating layers. The connection terminals of the conductive layer are joined to the pads of the FPC by solder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 8,934,201 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, if the connection terminal is a flying lead, the thinner the conductive layer, the thinner the connection terminal. The insulating layer can cover and reinforce the connection terminal. However, the insulating layer may prevent solder from adhering to the connection terminal.

[0006] One example of a problem to be solved by the present invention is to provide a suspension assembly and a disk drive that can improve the reliability of connections between connection terminals. [Means for solving the problem]

[0007] According to one embodiment, a suspension assembly includes a support plate, a wiring member, and a magnetic head. The wiring member has a mounting portion disposed on the support plate and a tail connection portion spaced from the support plate. The magnetic head is mounted on the mounting portion. The tail connection portion includes an insulating base layer, an insulating cover layer, a conductive layer disposed between the base layer and the cover layer, and a backing layer attached to the base layer. The cover layer includes a first cover and a second cover spaced from the first cover, and a groove is provided between the first cover and the second cover. The conductive layer includes at least one first wiring disposed on the first cover and electrically connected to the magnetic head, at least one second wiring disposed on the second cover, and at least one connection terminal extending across the groove between the first wiring and the second wiring. The base layer has a first base covering the first wiring, a second base covering the second wiring, at least a pair of first protrusions each protruding from the first base to partially cover the connection terminal and spaced apart from the second base, and at least a pair of second protrusions each protruding from the second base to partially cover the connection terminal and spaced apart from the first base and the pair of first protrusions. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an exemplary perspective view showing an exploded HDD according to the first embodiment. [Figure 2] FIG. 2 is an exemplary plan view showing the HGA of the first embodiment. [Figure 3] FIG. 3 is an exemplary plan view that schematically illustrates a part of the carriage, the FPC, and the flexure according to the first embodiment. [Figure 4] FIG. 4 is an exemplary plan view showing the tail connection portion of the first embodiment. [Figure 5] FIG. 5 is an exemplary plan view showing a part of the tail connection portion of the first embodiment. [Figure 6]FIG. 6 is an exemplary cross-sectional view showing the tail connection portion of the first embodiment taken along line F6-F6 in FIG. [Figure 7] FIG. 7 is an exemplary cross-sectional view showing the tail connection portion and the joint portion of the first embodiment taken along line F7-F7 in FIG. [Figure 8] FIG. 8 is an exemplary cross-sectional view showing the tail connection and splice of the first embodiment displaced from their predetermined alignment. [Figure 9] FIG. 9 is an exemplary plan view showing a part of the tail connection portion according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) The first embodiment will be described below with reference to FIGS. 1 to 8. In this specification, components according to the embodiment and descriptions of the components may be described using multiple expressions. The components and their descriptions are merely examples and are not limited by the expressions in this specification. The components may also be identified by names different from those in this specification. Furthermore, the components may also be described using expressions different from those in this specification.

[0010] In the following description, "suppress" is defined as, for example, preventing an event, action, or influence from occurring, or reducing the severity of an event, action, or influence. Also, 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.

[0011] 1 is an exemplary exploded perspective view showing a hard disk drive (HDD) 10 according to the first 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.

[0012] 1, the HDD 10 includes a housing 11, multiple 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. Note that the HDD 10 is not limited to this example.

[0013] The housing 11 accommodates the magnetic disk 12, the spindle motor 13, the HSA 14, the VCM 15, and the ramp load mechanism 16. The housing 11 has a base 21, an inner cover 22, and an outer cover .

[0014] The base 21 is formed in the shape of a substantially rectangular parallelepiped box that is open in one direction. The base 21 has a bottom wall 25 and side walls 26. The bottom wall 25 is formed in the shape of a substantially rectangular (quadrilateral) plate. The side walls 26 protrude from the edges of the bottom wall 25 and are formed in the shape of a substantially rectangular frame.

[0015] The inner cover 22 is attached to the end of the side wall 26 by, for example, screws, and closes the space inside the base 21. The outer cover 23 covers the inner cover 22 and is attached to the end of the side wall 26 by, for example, welding. A vent 27 is provided in the inner cover 22. Furthermore, a vent 28 is provided in the outer cover 23.

[0016] After components are attached inside base 21 and inner cover 22 and outer cover 23 are attached to base 21, the air inside housing 11 is evacuated through vent holes 27 and 28. Furthermore, the inside of housing 11 is filled with a gas other than air.

[0017] The gas filled inside the housing 11 is, for example, a low-density gas having a density lower than that of air, an inert gas having low reactivity, etc. For example, helium is filled inside the housing 11. Note that the housing 11 may also be filled with other fluids.

[0018] The vent hole 28 in the outer cover 23 is closed by a seal 29. The seal 29 airtightly seals the vent hole 28 and restricts the fluid filled inside the housing 11 from leaking out through the vent hole 28.

[0019] The plurality of magnetic disks 12 are formed in a substantially circular disk shape. A magnetic recording layer is provided on at least one of the upper and lower surfaces of the magnetic disks 12. The plurality of magnetic disks 12 are stacked with gaps between them.

[0020] The spindle motor 13 supports the plurality of magnetic disks 12. The spindle motor 13 rotates the plurality of magnetic disks 12 around a central axis Axd of the spindle motor 13. The plurality of magnetic disks 12 are held on a hub of the spindle motor 13 by, for example, a clamp spring.

[0021] The HSA 14 is rotatably supported by a support shaft 31. The support shaft 31 is provided at a position spaced apart from the magnetic disk 12 in a direction perpendicular to the central axis Axd. The support shaft 31 protrudes from the bottom wall 25 of the housing 11.

[0022] The HSA 14 can rotate around a central axis Axh. The central axis Axh is an imaginary axis that extends substantially parallel to the central axis Axd of the magnetic disk 12. The central axis Axh is, for example, the center of rotation of the HSA 14 and also the central axis of the support shaft 31.

[0023] The HSA 14 includes a carriage 35, a plurality of head gimbal assemblies (HGA) 36, and a flexible printed circuit board (FPC) 37. The HGA 36 is an example of a suspension assembly and may also be referred to as a head suspension. The FPC 37 is an example of a substrate.

[0024] The carriage 35 is made of, for example, metal and includes an actuator block 41, a plurality of arms 42, and a frame 43.

[0025] The actuator block 41 is rotatably supported on the support shaft 31 via a bearing, for example. The arms 42 protrude from the actuator block 41 in a direction substantially perpendicular to the central axis Axh. Note that the carriage 35 may be divided, and an arm 42 may protrude from each of the actuator blocks 41.

[0026] The arms 42 extend substantially parallel to one another and are spaced apart along the central axis Axh. Each arm 42 is formed in a plate shape that can enter the gap between two adjacent ones of the magnetic disks 12.

[0027] The frame 43 protrudes from the actuator block 41 and is located on the opposite side of the arm 42. The voice coil of the VCM 15 is attached to the frame 43. The VCM 15 has the voice coil, a pair of yokes, and a magnet attached to the yokes.

[0028] FIG. 2 is an exemplary plan view showing the HGA 36 of the first embodiment. The multiple HGAs 36 are attached to the ends of corresponding ones of the multiple arms 42. As a result, the multiple HGAs 36 are arranged at intervals along the central axis Axh. As shown in FIG. 2, each of the multiple HGAs 36 has a suspension 51 and a magnetic head 52. The magnetic head 52 may also be referred to as a slider.

[0029] The suspension 51 supports the magnetic head 52. The suspension 51 has a support plate 55 and a flexure 56. The flexure 56 is an example of a wiring member. The support plate 55 has a base plate 57 and a load beam 58. Note that the support plate 55 is not limited to this example and may be, for example, a single member.

[0030] The base plate 57 is formed in a plate shape and is attached to the tip of the arm 42. The load beam 58 is formed in a plate shape that is thinner than the base plate 57. The load beam 58 is attached to the base plate 57 so as to protrude therefrom.

[0031] The flexure 56 is a type of flexible printed wiring board formed in a long, thin strip shape. The flexure 56 has, for example, a front portion 61 and a rear portion 62. Note that the front portion 61 and the rear portion 62 are names for convenience and do not limit the position, direction, or usage mode.

[0032] The front portion 61 is disposed on the support plate 55. For example, the front portion 61 is attached to the support plate 55 by spot welding at a plurality of positions. The front portion 61 has a gimbal 65. The gimbal 65 is an example of a mounting portion.

[0033] The gimbal 65 is provided at one end of the flexure 56. The magnetic head 52 is mounted on the gimbal 65. The gimbal 65 is attached to the load beam 58 so that the magnetic head 52 can rotate.

[0034] The rear portion 62 extends along the arm 42 from the front portion 61 toward the actuator block 41. The rear portion 62 is spaced apart from the support plate 55. The rear portion 62 has a tail connection portion 66. The tail connection portion 66 is provided at the other end of the flexure 56.

[0035] 3 is an exemplary plan view schematically illustrating a portion of the carriage 35, the FPC 37, and the flexure 56 according to the first embodiment. As shown in FIG. 3, the tail connection portion 66 is formed in a strip shape and has a plurality of connection terminals 67. The connection terminals 67 may also be referred to as electrodes.

[0036] 1, the FPC 37 is formed, for example, in a strip shape. The FPC 37 has two joints 71 and 72 and a flexible portion 73. The joint 71 is provided at one end of the FPC 37 and is attached to the actuator block 41. The joint 72 is provided at the other end of the FPC 37 and is attached to the bottom wall 25 of the base 21. The flexible portion 73 is provided between the joints 71 and 72 and bends elastically in response to rotation of the HSA 14.

[0037] 3, the joint portion 71 has a surface 71a. The surface 71a is a flat surface formed in a substantially rectangular shape and faces in a direction substantially perpendicular to the central axis Axh as a whole. Note that the surface 71a is not limited to this example and may have irregularities or may be partially curved.

[0038] For convenience, the X-axis, Y-axis, and Z-axis are defined below. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The X-axis is aligned along the width of the surface 71a. The Y-axis is aligned along the length of the surface 71a. The Z-axis is aligned perpendicular to the surface 71a.

[0039] Furthermore, in this specification, the X direction, Y direction, and Z direction are defined. The X direction is a direction along the X axis, and includes the +X direction indicated by the X axis arrow and the -X direction opposite to the X axis arrow. The Y direction is a direction along the Y axis, and includes the +Y direction indicated by the Y axis arrow and the -Y direction opposite to the Y axis arrow. The Z direction is a direction along the Z axis, and includes the +Z direction indicated by the Z axis arrow and the -Z direction opposite to the Z axis arrow. The surface 71a faces the +Z direction.

[0040] A plurality of pads 75 are provided on the joint portion 71. The pads 75 may also be referred to as electrodes or lands. The pads 75 form a plurality of rows aligned approximately in the X direction. In each of the rows, the pads 75 are aligned approximately in the Y direction. The number of rows of pads 75 is equal to the number of HGAs 36. The tail connection portion 66 of the HGA 36 extends approximately in the Y direction along the rows of pads 75 and covers the rows of pads 75.

[0041] The HGA 36 further includes a plurality of solder pieces S. The plurality of solder pieces S join the plurality of connection terminals 67 of the flexure 56 to the plurality of pads 75 of the FPC 37. As a result, the flexure 56 electrically connects the FPC 37 and the magnetic head 52.

[0042] 1 rotates the carriage 35 about the central axis Axh. The carriage 35 moves the magnetic head 52 to a desired position on the magnetic disk 12 by rotating about the central axis Axh.

[0043] The magnetic head 52 has a read element that reproduces information from the recording layer of the magnetic disk 12 and a write element that records information on the recording layer. The magnetic head 52 reads and writes information from and to the magnetic disk 12. The magnetic head 52 may also have other devices, such as a laser diode, that heat the magnetic disk 12.

[0044] When the magnetic head 52 moves to the outermost periphery of the magnetic disk 12 due to the rotation of the carriage 35 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 magnetic head 52 is separated from the magnetic disk 12.

[0045] The PCB 17 is disposed outside the housing 11 and attached to the bottom wall 25 of the base 21. The PCB 17 includes, for example, a printed wiring board (PWB) 81, a relay connector 82, an interface (I / F) connector 83, and a controller 84.

[0046] The PWB 81 is a rigid board such as a glass epoxy board, and is a multi-layer board or a build-up board. The relay connector 82, the I / F connector 83, and the controller 84 are mounted on the PWB 81.

[0047] The relay connector 82 is electrically connected to the joint 72 of the FPC 37 through, for example, a connector provided on the bottom wall 25 of the housing 11. The I / F connector 83 is connected to a host computer. The controller 84 is, for example, an electronic component such as a system on a chip, and controls the operation of the HDD 10.

[0048] The controller 84 is electrically connected to the magnetic head 52 through the PWB 81, the relay connector 82, the FPC 37, and the flexure 56. The controller 84 reads and writes information from and to the magnetic disk 12 using the magnetic head 52.

[0049] Fig. 4 is an exemplary plan view showing the tail connection portion 66 of the first embodiment. Fig. 5 is an exemplary plan view showing a portion of the tail connection portion 66 of the first embodiment. Fig. 6 is an exemplary cross-sectional view showing the tail connection portion 66 of the first embodiment along line F6-F6 in Fig. 5.

[0050] 6, the flexure 56 has a base layer 91, a cover layer 92, a conductive layer 93, and a backing layer 94. Therefore, the tail connection portion 66, which is a part of the flexure 56, also partially has the base layer 91, the cover layer 92, the conductive layer 93, and the backing layer 94. The base layer 91 and the cover layer 92 may also be referred to as insulating layers.

[0051] The base layer 91 and the cover layer 92 are each an insulating thin film made of, for example, polyimide (PI). The base layer 91 and the cover layer 92 may be made of other materials or may be made of materials different from each other.

[0052] In the tail connection portion 66, the base layer 91 has two surfaces 91a and 91b. The surface 91a is formed to be approximately flat and faces approximately in the +Z direction as a whole. The surface 91b is located on the opposite side of the surface 91a. The surface 91b is formed to be approximately flat and faces approximately in the -Z direction as a whole. The surface 91b of the base layer 91 and the surface 71a of the joint portion 71 face each other. The cover layer 92 covers the surface 91b of the base layer 91.

[0053] The conductive layer 93 is made of a metal such as copper foil. The conductive layer 93 is provided on the surface 91b of the base layer 91. A portion of the conductive layer 93 is covered by the cover layer 92. That is, the conductive layer 93 is disposed between the base layer 91 and the cover layer 92.

[0054] The backing layer 94 is, for example, a metal plate made of stainless steel. However, the backing layer 94 is not limited to this example. The backing layer 94 is attached to the surface 91a of the base layer 91. The rigidity of the backing layer 94 is higher than the rigidity of each of the base layer 91, the cover layer 92, and the conductive layer 93.

[0055] 4, the cover layer 92 in the tail connection portion 66 is formed in a generally rectangular frame shape. The cover layer 92 has two side portions 101 and 102 and two end portions 103 and 104. The side portion 101 is an example of a first cover. The side portion 102 is an example of a second cover.

[0056] Each of the side portions 101 and 102 extends substantially in the Y direction. The side portion 102 is spaced apart from the side portion 101 in the +X direction. The +X direction is an example of a first direction. The end portion 103 is connected to the ends of the side portions 101 and 102 in the +Y direction. The end portion 104 is connected to the ends of the side portions 101 and 102 in the -Y direction. Therefore, the end portion 104 is spaced apart from the end portion 103 in the -Y direction.

[0057] A cover groove 105 is provided in the cover layer 92. The cover groove 105 is an example of a groove. The cover groove 105 is a hole that penetrates the cover layer 92 substantially in the Z direction. Note that the cover groove 105 is not limited to this example and may be, for example, a notch.

[0058] The cover groove 105 is defined, for example, by side portions 101 and 102 and end portions 103 and 104. Therefore, the cover groove 105 is located between the two side portions 101 and 102 and between the two end portions 103 and 104. The cover groove 105 extends substantially in the Y direction.

[0059] 5, the side portion 101 has an edge 101a. The edge 101a is provided at the end of the side portion 101 in the +X direction and extends approximately in the Y direction. The side portion 102 has an edge 102a. The edge 102a is provided at the end of the side portion 102 in the -X direction and extends approximately in the Y direction. The edges 101a and 102a face each other and define a cover groove 105.

[0060] The cover layer 92 further has multiple pairs of protrusions 107, 108. The protrusions 107 are an example of a third protrusion. The protrusions 108 are an example of a fourth protrusion. The multiple pairs of protrusions 107 protrude from the edge 101a of the side portion 101 toward the side portion 102 in approximately the +X direction. The protrusions 107 are spaced apart from the side portion 102. The multiple pairs of protrusions 108 protrude from the edge 102a of the side portion 102 toward the side portion 101 in approximately the -X direction. The protrusions 108 are spaced apart from the side portion 101 and the protrusions 107.

[0061] In the tail connection portion 66, the conductive layer 93 has a plurality of wirings 111 and 112 and a plurality of connection terminals 67. The wiring 111 is an example of a first wiring. The wiring 112 is an example of a second wiring. The wirings 111 and 112 may also be referred to as signal lines.

[0062] 6, the wiring 111 is provided on the surface 91b of the base layer 91, and is disposed between the base layer 91 and the side portion 101. In other words, the wiring 111 is disposed on the side portion 101. The multiple wirings 111 extend substantially parallel to each other on the side portion 101.

[0063] The wiring 111 extends between the side portion 101 and the gimbal 65. At least one of the plurality of wirings 111 is electrically connected to the magnetic head 52 through the gimbal 65. At least another of the plurality of wirings 111 may be electrically connected to another component such as a piezoelectric element, may be floating, or may be electrically connected to the backing layer 94.

[0064] The wiring 112 is provided on the surface 91b of the base layer 91, and is disposed between the base layer 91 and the side portion 102. In other words, the wiring 112 is disposed on the side portion 102. The multiple wirings 112 extend substantially parallel to each other on the side portion 102.

[0065] Each of the plurality of wirings 112 is electrically connected to, for example, the magnetic head 52, the piezoelectric element, or the underlayer 94. At least one of the plurality of wirings 112 may be floating.

[0066] 5, the multiple connection terminals 67 extend substantially in the +X direction from the multiple wirings 111 toward the multiple wirings 112. That is, each of the multiple connection terminals 67 extends substantially in the X direction between one wiring 111 and one wiring 112 across the cover groove 105, and is formed in a beam shape.

[0067] 6, each of the connection terminals 67 has two surfaces 67a and 67b. The surface 67a is formed to be substantially flat and faces substantially in the +Z direction. The surface 67b is located on the opposite side of the surface 67a and faces substantially in the -Z direction.

[0068] 5, each of the multiple connection terminals 67 further has a pair of edges 67c, 67d. Edge 67c is provided at the end of connection terminal 67 in the +Y direction and extends substantially in the X direction. Edge 67d is provided at the end of connection terminal 67 in the -Y direction and extends substantially in the X direction. In other words, the pair of edges 67c, 67d are located on opposite sides to each other. Note that edges 67c, 67d may be uneven or curved.

[0069] As shown in Fig. 6, the protrusions 107 and 108 of the cover layer 92 each partially cover the surface 67b of the connection terminal 67. As shown in Fig. 5, for example, the pair of protrusions 107 covers a pair of edges 67c and 67d of the connection terminal 67. In other words, each of the pair of protrusions 107 extends in the Y direction across the edge 67c or the edge 67d. The pair of protrusions 108 also cover the pair of edges 67c and 67d of the connection terminal 67. Note that the protrusions 107 and 108 may be spaced apart from the edges 67c and 67d.

[0070] A hole 115 is provided in each of the multiple connection terminals 67 of the conductive layer 93. The hole 115 penetrates the connection terminal 67 substantially in the Z direction and opens to the two surfaces 67a, 67b. The hole 115 is formed, for example, in an oval shape extending in the X direction. Note that the shape of the hole 115 is not limited to this example.

[0071] The hole 115 is provided in the center of the connection terminal 67. In other words, the hole 115 is provided in the center of the connection terminal 67 in the X direction and in the Y direction. Note that the center of the hole 115 may be spaced apart from the center of the connection terminal 67 as long as a portion of the hole 115 is located in the center of the connection terminal 67. The hole 115 may also be spaced apart from the center of the connection terminal 67.

[0072] The multiple connection terminals 67 are arranged at intervals in the Y direction (+Y direction). The +Y direction is a direction perpendicular to the +X direction and is an example of a second direction. The interval between two adjacent connection terminals 67 is longer than the width of the connection terminals 67. The width of the connection terminals 67 is the distance between a pair of edges 67c, 67d in the Y direction. Note that the interval between the connection terminals 67 is not limited to this example.

[0073] 4, the base layer 91 in the tail connection portion 66 is formed in a generally rectangular frame shape. The base layer 91 has two side portions 121 and 122 and two end portions 123 and 124. The side portion 121 is an example of a first base. The side portion 122 is an example of a second base.

[0074] Each of the side portions 121 and 122 extends substantially in the Y direction. The side portion 121 covers the side portion 101 of the cover layer 92 and the plurality of wirings 111. The side portion 122 covers the side portion 102 of the cover layer 92 and the plurality of wirings 112. Therefore, the side portion 122 is spaced apart from the side portion 121 in the +X direction.

[0075] The end portion 123 is connected to the ends of the side portions 121 and 122 in the +Y direction. The end portion 123 covers the end portion 103 of the cover layer 92 and the plurality of wirings 111 and 112 arranged on the end portion 103.

[0076] The end portion 124 is connected to the ends of the side portions 121 and 122 in the -Y direction. Therefore, the end portion 124 is spaced apart in the -Y direction from the end portion 123. The end portion 124 covers the end portion 104 of the cover layer 92 and the multiple wirings 111 and 112 arranged on the end portion 104.

[0077] A base groove 125 is provided in the base layer 91. The base groove 125 is a hole that penetrates the base layer 91 substantially in the Z direction. Note that the base groove 125 is not limited to this example, and may be, for example, a notch.

[0078] The base groove 125 is defined, for example, by side portions 121 and 122 and end portions 123 and 124. Therefore, the base groove 125 is located between the two side portions 121 and 122 and between the two end portions 123 and 124. The base groove 125 extends substantially in the Y direction.

[0079] The base groove 125 communicates with the cover groove 105. The cover groove 105 and the base groove 125 expose surfaces 67a, 67b of the multiple connection terminals 67. That is, the multiple connection terminals 67 are parts of the conductive layer 93 exposed by the cover groove 105 and the base groove 125, and form flying leads. Note that the connection terminals 67 are not limited to this example.

[0080] 5, side portion 121 has edge 121a. Edge 121a is provided at the end of side portion 121 in the +X direction and extends approximately in the Y direction. Side portion 122 has edge 122a. Edge 122a is provided at the end of side portion 122 in the -X direction and extends approximately in the Y direction. Edge 121a and edge 122a face each other and define base groove 125.

[0081] The base layer 91 further has multiple pairs of protrusions 127, 128. The protrusions 127 are an example of a first protrusion. The protrusions 128 are an example of a second protrusion. The multiple pairs of protrusions 127 protrude from the edge 121a of the side portion 121 toward the side portion 122 in approximately the +X direction. The protrusions 127 are spaced apart from the side portion 122. The multiple pairs of protrusions 128 protrude from the edge 122a of the side portion 122 toward the side portion 121 in approximately the -X direction. The protrusions 128 are spaced apart from the side portion 121 and the protrusions 127.

[0082] The pairs of protrusions 127, 128 are spaced apart from each other in the Y direction. That is, one of the pair of protrusions 127 is spaced apart from the other in the +Y direction. One of the pair of protrusions 128 is also spaced apart from the other in the +Y direction.

[0083] The protrusions 127 and 128 each partially cover the surface 67a of the connection terminal 67. For example, the pair of protrusions 127 covers a pair of edges 67c and 67d of the connection terminal 67. In other words, each of the pair of protrusions 127 extends in the Y direction across the edge 67c or the edge 67d. The pair of protrusions 128 also cover the pair of edges 67c and 67d of the connection terminal 67. Note that the protrusions 127 and 128 may be spaced apart from the edges 67c and 67d.

[0084] Each of the multiple protrusions 127 has a tip 127a. The tip 127a is provided at the end of the protrusion 127 in the +X direction. Each of the multiple protrusions 128 also has a tip 128a. The tip 128a is provided at the end of the protrusion 128 in the -X direction. The tips 127a, 128a each extend approximately in the Y direction. However, the tips 127a, 128a are not limited to this example. The tips 127a and 128a face each other.

[0085] A gap G1 is provided between the tip 127a of one of the pair of protrusions 127 and the tip 128a of one of the pair of protrusions 128. The gap G1 is an example of a first gap. The gap G1 extends approximately in the Y direction. The opposing protrusions 127, 128 are separated by the gap G1.

[0086] A gap G2 is provided between the other tip 127a of the pair of protrusions 127 and the other tip 128a of the pair of protrusions 128. The gap G2 is an example of a second gap. The gap G2 extends approximately in the Y direction. The opposing protrusions 127, 128 are separated by the gap G2.

[0087] In this embodiment, the gaps G1 and G2 are provided in the center of the connection terminal 67 in the X direction (+X direction). Therefore, the gaps G1 and G2 are aligned in the Y direction (+Y direction). Note that, as long as a portion of the gaps G1 and G2 is located in the center of the connection terminal 67 in the X direction, the centers of the gaps G1 and G2 may be spaced apart from the center of the connection terminal 67 in the X direction. Furthermore, the gaps G1 and G2 may be spaced apart from the center of the connection terminal 67 in the X direction.

[0088] In the Y direction (+Y direction), the hole 115 is located between the pair of protrusions 127 and between the pair of protrusions 128. The hole 115 is spaced apart from the protrusions 127 and 128, and is also spaced apart from the gaps G1 and G2.

[0089] Each of the multiple protrusions 127 is at least partially tapered toward the side 122. For example, each of the protrusions 127 has two edges 127b and 127c. The edge 127b is spaced apart from the connection terminal 67 and extends substantially in the X direction. The edge 127c is located opposite the edge 127b. The edge 127c extends obliquely with respect to the edge 127b on the surface 67a of the connection terminal 67. The distance between the edge 127b and the edge 127c decreases toward the side 122.

[0090] Each of the multiple protrusions 128 is at least partially tapered toward the side 121. For example, each of the protrusions 128 has two edges 128b and 128c. The edge 128b is spaced apart from the connection terminal 67 and extends substantially in the X direction. The edge 128c is located opposite the edge 128b. The edge 128c extends obliquely with respect to the edge 128b on the surface 67a of the connection terminal 67. The distance between the edges 128b and 128c decreases toward the side 122. The edges 127c and 128c face the hole 115.

[0091] In the X direction (+X direction), the length of each of the protrusions 127, 128 is 25% or more of the length of the connection terminal 67. In the X direction (+X direction), the hole 115 is longer than the gaps G1 and G2. Note that the lengths of the protrusions 127, 128 and the hole 115 are not limited to this example. For example, the hole 115 may be shorter than at least one of the gaps G1 and G2.

[0092] The protrusion 107 of the cover layer 92 covers the protrusion 127 of the base layer 91. In the X direction, the protrusion 107 of the cover layer 92 is shorter than the protrusion 127 of the base layer 91. In other words, the protrusion 107 of the cover layer 92 protrudes from the side portion 101 by a distance shorter than the protrusion 127 of the base layer 91.

[0093] The protrusion 108 of the cover layer 92 covers the protrusion 128 of the base layer 91. In the X direction, the protrusion 108 of the cover layer 92 is shorter than the protrusion 128 of the base layer 91. In other words, the protrusion 108 of the cover layer 92 protrudes from the side portion 102 by a distance shorter than the protrusion 128 of the base layer 91.

[0094] In the X direction, the length of each of the protrusions 107, 108 is shorter than 25% of the length of the connection terminal 67. Therefore, in the X direction, the gap between the two opposing protrusions 107, 108 is longer than the hole 115. Note that the length of the protrusions 107, 108 is not limited to this example.

[0095] In the tail connection portion 66, the backing layer 94 is formed in a substantially rectangular frame shape. A through hole 131 is provided in the backing layer 94. The through hole 131 penetrates the backing layer 94 substantially in the Z direction and communicates with the base groove 125. The through hole 131 is larger than the base groove 125. The through hole 131 exposes the connection terminal 67 and the protrusions 127 and 128.

[0096] 7 is an exemplary cross-sectional view showing the tail connection portion 66 and the joint portion 71 of the first embodiment along line F7-F7 in FIG. 7, the solder S is attached to the pad 75 of the joint portion 71. Furthermore, the solder S is attached to the surface 67b of the connection terminal 67 and also passes through the hole 115 to the surface 67a. In this way, the solder S joins the connection terminal 67 and the pad 75.

[0097] 5, many wirings 111, 112 are provided in the tail connection portion 66. By thinning the conductive layer 93, the width of the wirings 111, 112 can also be reduced, and thus many wirings 111, 112 can be provided in the tail connection portion 66. For example, the thickness of the conductive layer 93 is set to 8 μm or less. However, the thickness of the conductive layer 93 is not limited to this example.

[0098] As described above, the connection terminals 67 form flying leads. Therefore, by thinning the conductive layer 93, the connection terminals 67 also become thinner. In this embodiment, the protrusions 127, 128 of the base layer 91 cover more than half of the connection terminals 67 in the X direction. Therefore, the protrusions 127, 128 can reinforce the thin connection terminals 67. Note that even if the length of the protrusions 127, 128 is less than half the length of the connection terminals 67, the protrusions 127, 128 can reinforce the connection terminals 67.

[0099] In manufacturing the flexures 56, a single sheet is formed that includes a plurality of flexures 56. The sheet is, for example, wound into a roll and stretched between its two ends. That is, the flexures 56 are stretched in a direction along the surfaces 91a and 91b of the base layer 91.

[0100] When the flexure 56 is pulled, the thin connection terminals 67 are also pulled in the direction along the surfaces 91a and 91b. However, the protrusions 127 and 128 reinforce the connection terminals 67, thereby preventing the connection terminals 67 from being damaged.

[0101] The protrusions 127, 128 reduce the length in the X direction of the portion of the connection terminal 67 that is not covered by the base layer 91. Therefore, the portion of the connection terminal 67 that is not covered by the base layer 91 is less likely to be damaged even if pulled in the X direction. In other words, the protrusions 127, 128 can also improve the strength of the portion of the connection terminal 67 that is not covered by the protrusions 127, 128.

[0102] 8 is an exemplary cross-sectional view showing the tail connection portions 66 and the joint portions 71 that are displaced from the predetermined positions in the first embodiment. In manufacturing the HGA 36, for example, after a paste of solder S is applied to the pads 75 by printing, the tail connection portions 66 are placed on the row of pads 75. When a laser beam is irradiated onto the multiple tail connection portions 66, the solder S melts and spreads onto the connection terminals 67.

[0103] The tail connector 66 is positioned relatively accurately in the X direction, for example, by a jig. However, the tail connector 66 may shift from the predetermined position in the Y direction due to, for example, flexure of the rear portion 62.

[0104] 8, the tail connection portion 66 may be displaced in the +Y direction from the predetermined position. In this case, the position of the connection terminal 67 and the positions of the corresponding pad 75 and solder S are displaced in the Y direction. For example, the center of the surface 67b between the hole 115 and the edge 67d faces the center of the pad 75.

[0105] The gap G2 exposes the surface 67b and edge 67d of the connection terminal 67 between the two protrusions 127, 128. Therefore, the solder S passes through the hole 115 and adheres to the surface 67b, and also flows around the edge 67d and adheres to the surface 67b. This sufficiently increases the contact area between the solder S and the connection terminal 67. This improves the reliability of the connection between the connection terminal 67 and the pad 75. Furthermore, the molten solder S can move the connection terminal 67 toward a predetermined position due to surface tension.

[0106] In contrast to this embodiment, when the protrusions 127, 128 are connected to each other and continuously cover the connection terminal 67 between the two side portions 121, 122, gaps G1, G2 are not provided. This results in a relatively small contact area between the solder S and the surface 67b of the connection terminal 67. Furthermore, the solder S does not easily spread on the base layer 91 made of PI. In other words, the base layer 91 repels the solder S. Therefore, the molten solder S may flow over the protrusions 127, 128 and approach other connection terminals 67, reducing the margin. However, the protrusions 127, 128 of this embodiment are spaced apart, which allows the solder S to adhere sufficiently to the connection terminal 67 and prevents the solder S from approaching other connection terminals 67.

[0107] In the HDD 10 according to the first embodiment described above, the flexure 56 includes a gimbal 65 disposed on the support plate 55 and a tail connection portion 66 spaced apart from the support plate 55. The magnetic head 52 is mounted on the gimbal 65. The tail connection portion 66 includes an insulating base layer 91, an insulating cover layer 92, a conductive layer 93, and a backing layer 94. The conductive layer 93 is disposed between the base layer 91 and the cover layer 92. The backing layer 94 is attached to the base layer 91. The cover layer 92 includes a side portion 101 and a side portion 102 spaced apart from the side portion 101. A cover groove 105 is provided between the side portions 101 and 102. The conductive layer 93 includes at least one wiring 111, at least one wiring 112, and at least one connection terminal 67. The wiring 111 is disposed on the side portion 101 and is electrically connected to the magnetic head 52. The wiring 112 is disposed on the side portion 102. The connection terminal 67 extends between the wiring 111 and the wiring 112 across the cover groove 105. The base layer 91 has a side portion 121, a side portion 122, at least a pair of protrusions 127, and at least a pair of protrusions 128. The side portion 121 covers the wiring 111. The side portion 122 covers the wiring 112. The pair of protrusions 127 each protrude from the side portion 121, partially cover the connection terminal 67, and are spaced apart from the side portion 122. The pair of protrusions 128 each protrude from the side portion 122, partially cover the connection terminal 67, and are spaced apart from the side portion 121 and the pair of protrusions 127.

[0108] If the base layer 91 does not cover the connection terminals 67 that cross the cover grooves 105, the connection terminals 67, which are made of a thin metal foil, are fragile and may be damaged, for example, by breakage or cracking during manufacturing. On the other hand, if the base layer 91 continuously covers the connection terminals 67 between the side portions 121 and 122, the solder S joining the connection terminals 67 may contact, for example, one surface 67b of the connection terminals 67 but hardly contact the other surface 67a of the connection terminals 67 covered by the base layer 91. This may result in a small contact area between the solder S and the connection terminals 67. Furthermore, the wetting of the solder S on the base layer 91 is small. In other words, the contact angle of the solder S with respect to the base layer 91 is large. Therefore, if the positions of the solder S and the connection terminals 67 are misaligned from their predetermined positions, the solder S may flow along the continuous surfaces 91a and 91b of the base layer 91 and approach other connection terminals 67. However, in the base layer 91 of this embodiment, the pair of protrusions 127 and the pair of protrusions 128 partially cover the connection terminals 67 and are spaced apart from each other. Therefore, the connection terminals 67 are reinforced by the protrusions 127 and 128, preventing damage. That is, the HGA 36 of this embodiment is easy to manufacture. Furthermore, the solder S can be attached to the surface 67a of the connection terminals 67 exposed between the protrusions 127 and 128. Even if the positions of the solder S and the connection terminals 67 are misaligned from the predetermined arrangement, the solder S can be attached to the surface 67a of the connection terminals 67 exposed between the protrusions 127 and 128, thereby ensuring sufficient adhesion to the connection terminals 67 and preventing the solder S from approaching other connection terminals 67. As a result, the HGA 36 can improve the reliability of the connection of the connection terminals 67.

[0109] The conductive layer 93 is provided with holes 115 that penetrate the connection terminals 67. The holes 115 expose, for example, the solder S that joins the connection terminals 67. Therefore, for example, laser light can be irradiated onto the solder S through the holes 115, and the solder S can be melted efficiently. Furthermore, the solder S can adhere to one surface 67b of the connection terminals 67 and spread to the other surface 67a through the holes 115. This allows the solder S to adhere sufficiently to the connection terminals 67.

[0110] The connection terminal 67 extends in the +X direction from the wiring 111 toward the wiring 112. One of the pair of protrusions 127 is spaced apart from the other in the +Y direction perpendicular to the +X direction. One of the pair of protrusions 128 is spaced apart from the other in the +Y direction. In the +Y direction, the hole 115 is located between the pair of protrusions 127 and between the pair of protrusions 128.

[0111] When the pair of protrusions 127 and the pair of protrusions 128 are positioned between the hole 115 and one edge 67c of the connection terminal 67, the exposed area of ​​the connection terminal 67 is biased. Therefore, the positions of the solder S and the connection terminal 67 may be shifted from the predetermined position so that the solder S adheres to the area covered by the protrusions 127 and 128. In this case, the contact area between the solder S and the connection terminal 67 is reduced. However, in this embodiment, the hole 115 is positioned between the pair of protrusions 127 and between the pair of protrusions 128. That is, the protrusions 127 and 128 are more evenly positioned near the hole 115. This allows the solder S to stably adhere to the connection terminal 67 regardless of the direction in which the connection terminal 67 is shifted relative to the solder S.

[0112] A gap G1 is provided between one of the pair of protrusions 127 and one of the pair of protrusions 128. A gap G2 is provided between the other of the pair of protrusions 127 and the other of the pair of protrusions 128. In the +X direction, hole 115 is longer than at least one of gap G1 and gap G2.

[0113] By providing hole 115, connection terminal 67 is divided into two beam-shaped portions near hole 115. Therefore, there is a possibility that the strength of connection terminal 67 may be reduced near hole 115. However, protrusions 127 and 128 are formed long so that gaps G1 and G2 are small. Therefore, protrusions 127 and 128 can further reinforce connection terminal 67.

[0114] The hole 115 is provided in the center of the connection terminal 67. For example, if the hole 115 is spaced apart from the center of the connection terminal 67, the positions of the solder S and the connection terminal 67 may be displaced from the predetermined arrangement, such that the solder S adheres to the connection terminal 67 at a position spaced apart from the hole 115. In this case, the solder S may not pass through the hole 115, and the contact area between the solder S and the connection terminal 67 may become smaller. However, in this embodiment, the hole 115 is provided in the center of the connection terminal 67. This allows the solder S to easily flow through the hole 115 and stably adhere to the connection terminal 67, regardless of the direction in which the connection terminal 67 is displaced from the solder S.

[0115] The connection terminal 67 has a pair of edges 67c, 67d located opposite each other. A pair of protrusions 127 cover the pair of edges 67c, 67d. A pair of protrusions 128 cover the pair of edges 67c, 67d. That is, the protrusions 127 and 128 can extend across the edges 67c, 67d. Therefore, the protrusions 127 and 128 can be formed large, which can further reinforce the connection terminal 67.

[0116] Gap G1 and gap G2 are aligned in the +Y direction. For example, if the position of gap G1 and the position of gap G2 differ in the +X direction, there is a possibility that the solder S will adhere to the connection terminal 67 at a position separated from gaps G1 and G2. In this case, the contact area between the solder S and the connection terminal 67 will be small. However, in this embodiment, gap G1 and gap G2 are positioned at approximately the same position in the +X direction. This allows the solder S to stably adhere to the connection terminal 67 regardless of the direction in which the connection terminal 67 is displaced relative to the solder S.

[0117] The gaps G1 and G2 are provided at the center of the connection terminal 67 in the +X direction. If the gaps G1 and G2 were spaced apart from the center of the connection terminal 67 in the +X direction, the positions of the solder S and the connection terminal 67 may be shifted from the predetermined arrangement so that the solder S adheres to the area covered by the protrusion 127 or the protrusion 128. In this case, the contact area between the solder S and the connection terminal 67 becomes smaller. However, in this embodiment, the gaps G1 and G2 are provided at the center of the connection terminal 67 in the +X direction. That is, the protrusions 127 and the protrusions 128 are more evenly arranged around the center of the connection terminal 67. This allows the solder S to stably adhere to the connection terminal 67 regardless of the direction in which the connection terminal 67 is shifted relative to the solder S.

[0118] In the +X direction, the length of each of the pair of protrusions 127 and the pair of protrusions 128 is 25% or more of the length of the connection terminal 67. In other words, one protrusion 127 and one protrusion 128 cover 50% or more of the connection terminal 67 in the +X direction. Therefore, the protrusions 127 and the protrusions 128 can further reinforce the connection terminal 67.

[0119] Each of the pair of protrusions 127 is at least partially tapered toward the side portion 122. Each of the pair of protrusions 128 is at least partially tapered toward the side portion 121. This allows the protrusions 127 and 128 to bypass, for example, the hole 115 provided in the connection terminal 67. In other words, the protrusions 127 and 128 can expose a wider area of ​​the connection terminal 67 near the hole 115. This allows the solder S to adhere stably to the connection terminal 67.

[0120] The cover layer 92 has at least a pair of protrusions 107 and at least a pair of protrusions 108. Each of the pair of protrusions 107 protrudes from the side portion 101 shorter than the pair of protrusions 127 and partially covers the connection terminal 67. Each of the pair of protrusions 108 protrudes from the side portion 102 shorter than the pair of protrusions 128 and partially covers the connection terminal 67 while being spaced apart from the pair of protrusions 107. This allows the protrusions 107 and 108 to reinforce the connection terminal 67. In addition, generally, the surface 67b of the connection terminal 67 covered by the cover layer 92 adheres to the solder S. Because the protrusions 107 and 108 are short, they are less likely to interfere with adhesion between the connection terminal 67 and the solder S. In other words, the solder S can stably adhere to the connection terminal 67.

[0121] The conductive layer 93 has a plurality of wirings 111, a plurality of wirings 112, and a plurality of connection terminals 67. The plurality of connection terminals 67 extend in the +X direction from the plurality of wirings 111 toward the plurality of wirings 112. The base portion has a plurality of pairs of protrusions 127 and a plurality of pairs of protrusions 128. The plurality of connection terminals 67 are arranged at intervals in the +Y direction.

[0122] If the positions of the solder S and the connection terminals 67 are misaligned from the predetermined arrangement, the solder S adhering to one connection terminal 67 may flow toward the other adjacent connection terminals 67. However, in the HGA36 of this embodiment, the solder S can be stably adhered to the connection terminals 67, and therefore, the solder S can be prevented from coming close to the other adjacent connection terminals 67.

[0123] (Second embodiment) The second embodiment will be described below with reference to Fig. 9. In the following description of the embodiment, components having the same functions as components already described are given the same reference numerals as the components already described, and further description may be omitted. Furthermore, multiple components given the same reference numerals do not necessarily have all the same functions and properties, and may have different functions and properties according to each embodiment.

[0124] 9 is an exemplary plan view showing a portion of the tail connection portion 66 according to the second embodiment. As shown in FIG. 9, the base layer 91 of the second embodiment has pairs of protrusions 201 and pairs of protrusions 202 instead of pairs of protrusions 127 and pairs of protrusions 128. Except as described below, the protrusions 201 are substantially equal to the protrusions 127, and the protrusions 202 are substantially equal to the protrusions 128.

[0125] One of the pair of protrusions 201 protrudes longer than the other from the edge 121a of the side portion 121. One of the pair of protrusions 202 protrudes longer than the other from the edge 122a of the side portion 122.

[0126] The tip 127a of one of the shorter protrusions 201 and the tip 128a of one of the longer protrusions 202 face each other with a gap G21 between them. That is, the gap G21 is provided between the one of the shorter protrusions 201 and the one of the longer protrusions 202. The gap G21 is an example of a first gap.

[0127] In the X direction, the length of the longer end of the protrusion 202 is 25% or more of the length of the connection terminal 67. Furthermore, in the X direction, the sum of the length of the shorter end of the protrusion 201 and the length of the longer end of the protrusion 202 is 50% or more of the length of the connection terminal 67. Note that the lengths of the protrusions 201 and 202 are not limited to this example.

[0128] One long tip 127a of protrusion 201 and one short tip 128a of protrusion 202 face each other with a gap G22 between them. That is, gap G22 is provided between the one long tip of protrusion 201 and the one short tip of protrusion 202. Gap G22 is an example of a second gap.

[0129] In the X direction, the length of one of the longer ends of the protrusion 201 is 25% or more of the length of the connection terminal 67. Furthermore, in the X direction, the sum of the length of one of the longer ends of the protrusion 201 and the length of one of the shorter ends of the protrusion 202 is 50% or more of the length of the connection terminal 67. Note that the lengths of the protrusions 201 and 202 are not limited to this example.

[0130] In the X direction (+X direction), the gap G21 is disposed at a different position from the gap G22. Therefore, the multiple gaps G21 and G22 are not aligned in the Y direction (+Y direction) but are disposed alternately.

[0131] In the HDD 10 of the second embodiment described above, the gap G21 is disposed at a different position in the +X direction from the gap G22. That is, the pair of protrusions 201 have different shapes. The pair of protrusions 202 also have different shapes. Therefore, stress is easily dispersed in the connection terminal 67, which is reinforced by the protrusions 201 and 202. Furthermore, at the center of the connection terminal 67 in the +X direction, the longer of the pair of protrusions 201 and the longer of the pair of protrusions 202 are aligned. That is, the center of the connection terminal 67 in the +X direction is reinforced by both the protrusions 201 and 202. Furthermore, the portions of the connection terminal 67 where the gap G21 and the gap G22 are provided are weak, but are not aligned. As described above, the protrusions 201 and 202 can further reinforce the connection terminal 67.

[0132] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0133] 10...Hard disk drive (HDD), 12...Magnetic disk, 36...Head gimbal assembly (HGA), 37...Flexible printed circuit board (FPC), 52...Magnetic head, 55...Support plate, 65...Gimbal, 66...Tail connection portion, 67...Connection terminal, 67c, 67d...Edge, 75...Pad, 91...Base layer, 92...Cover layer, 93...Conductive layer, 94...Backing layer, 101, 102...Side portion, 105...Cover groove, 107, 108...Protrusion, 111, 112...Wiring, 115...Hole, 121, 122...Side portion, 127, 128...Protrusion, S...Solder, G1, G2...Gap.

Claims

1. A support plate; a wiring member having a mounting portion disposed on the support plate and a tail connection portion spaced from the support plate; a magnetic head mounted on the mounting portion; Equipped with the tail connection portion includes an insulating base layer, an insulating cover layer, a conductive layer disposed between the base layer and the cover layer, and a backing layer attached to the base layer; the cover layer includes a first cover and a second cover spaced apart from the first cover, and a groove is provided between the first cover and the second cover; the conductive layer has at least one first wiring disposed on the first cover and electrically connected to the magnetic head, at least one second wiring disposed on the second cover, and at least one connection terminal extending between the first wiring and the second wiring across the groove; the base layer has a first base covering the first wiring, a second base covering the second wiring, at least a pair of first protrusions each protruding from the first base to partially cover the connection terminal and spaced apart from the second base, and at least a pair of second protrusions each protruding from the second base to partially cover the connection terminal and spaced apart from the first base and the pair of first protrusions; Suspension assembly.

2. a hole penetrating the connection terminal is provided in the conductive layer; 2. The suspension assembly of claim 1.

3. the connection terminal extends in a first direction from the first wiring toward the second wiring; one of the pair of first protrusions is spaced apart from the other in a second direction perpendicular to the first direction, one of the pair of second protrusions is spaced apart from the other in the second direction; In the second direction, the hole is located between the pair of first protrusions and between the pair of second protrusions.

3. The suspension assembly of claim 2.

4. the connection terminal extends in a first direction from the first wiring toward the second wiring; a first gap is provided between one of the pair of first protrusions and one of the pair of second protrusions; a second gap is provided between the other of the pair of first protrusions and the other of the pair of second protrusions; In the first direction, the hole is longer than at least one of the first gap and the second gap.

3. The suspension assembly of claim 2.

5. The hole is provided in the center of the connection terminal.

5. A suspension assembly according to any one of claims 2 to 4.

6. The connection terminal has a pair of edges located opposite to each other, the pair of first protrusions cover the pair of edges, the pair of second protrusions cover the pair of edges; 2. The suspension assembly of claim 1.

7. the connection terminal extends in a first direction from the first wiring toward the second wiring; one of the pair of first protrusions is spaced apart from the other in a second direction perpendicular to the first direction, one of the pair of second protrusions is spaced apart from the other in the second direction; a first gap is provided between one of the pair of first protrusions and one of the pair of second protrusions; a second gap is provided between the other of the pair of first protrusions and the other of the pair of second protrusions; the first gap and the second gap are aligned in the second direction; 7. The suspension assembly of claim 6.

8. the first gap and the second gap are provided at the center of the connection terminal in the first direction; 8. The suspension assembly of claim 7.

9. In the first direction, the length of each of the pair of first protrusions and the pair of second protrusions is 25% or more of the length of the connection terminal.

9. The suspension assembly of claim 7 or claim 8.

10. the connection terminal extends in a first direction from the first wiring toward the second wiring; a first gap is provided between one of the pair of first protrusions and one of the pair of second protrusions; a second gap is provided between the other of the pair of first protrusions and the other of the pair of second protrusions; In the first direction, the first gap is disposed at a different position from the second gap.

7. The suspension assembly of claim 6.

11. each of the pair of first protrusions at least partially tapered toward the second base; each of the pair of second protrusions at least partially tapered toward the first base; 2. The suspension assembly of claim 1.

12. the cover layer has at least a pair of third protrusions, each of which protrudes from the first cover shorter than the pair of first protrusions and partially covers the connection terminals, and at least a pair of fourth protrusions, each of which protrudes from the second cover shorter than the pair of second protrusions and partially covers the connection terminals and is spaced apart from the pair of third protrusions.

2. The suspension assembly of claim 1.

13. the conductive layer has a plurality of the first wirings, a plurality of the second wirings, and a plurality of the connection terminals extending in a first direction from the plurality of first wirings toward the plurality of second wirings; the base layer has a plurality of pairs of the first protrusions and a plurality of pairs of the second protrusions; the plurality of connection terminals are arranged at intervals in a second direction perpendicular to the first direction; 2. The suspension assembly of claim 1.

14. The suspension assembly of claim 1; A magnetic disk, a substrate provided with pads; solder that joins the connection terminal and the pad; A disk device comprising:

Images