Wiring circuit board

Abstract

To provide a wiring circuit board that can reinforce a connection part and can stably control the deformation of the wiring circuit board.SOLUTION: A suspension substrate 1 with a circuit extending in a predetermined direction includes a base insulating layer 3 and a conductor layer 4 arranged on one side of the base insulating layer 3 in a thickness direction. The base insulating layer 3 includes a first main body base 31 and a second main body base 32 that are arranged at intervals in the width direction, and a connecting portion 33 connecting a part of the first main body base 31 in a longitudinal direction and a part of the second main body base 32 in the longitudinal direction. Then, the suspension substrate 1 with the circuit further includes a reinforcing portion 10 that is arranged on the surface of the connecting portion 33 and reinforces the connecting portion 33. The reinforcing portion 10 includes two or more resin layers or metal members laminated in the thickness direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wired circuit board. [Background technology]

[0002] Wired circuit boards are used in various industrial products such as electronic and electrical devices. Known examples of such wired circuit boards include flexible printed wiring boards, flexible printed wiring boards with reinforcing layers, and suspension boards with circuits that have suspension (spring) layers.

[0003] For example, a suspension has been proposed that includes a metal layer, a dielectric layer, and a copper layer constituting a transmission wiring, in that order in the thickness direction of the metal layer, with the dielectric layer stacked on the metal layer in accordance with the transmission wiring of the patterned copper layer (see, for example, Patent Document 1).

[0004] Such a dielectric layer has a pattern corresponding to the transmission wiring, and has portions spaced apart from one another in the width direction perpendicular to the longitudinal direction of the suspension. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-259362 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the suspension described in Patent Document 1 is used, a load stress may act on the suspension, causing the suspension to deform. In such cases, it is desirable to control the deformation of the suspension.

[0007] In view of this, it has been considered to provide a connecting portion that connects the portions that are spaced apart from each other in the width direction in the dielectric layer included in the suspension described in Patent Document 1.

[0008] However, even if a connecting portion is provided in the dielectric layer, there is a risk that the connecting portion may be damaged by the load stress acting on the suspension, and there is a problem in that the deformation of the suspension cannot be stably controlled.

[0009] The present invention provides a wired circuit board capable of reinforcing connecting portions and stably controlling deformation of the wired circuit board. [Means for solving the problem]

[0010] The present invention [1] provides a wired circuit board extending in a predetermined direction, comprising an insulating layer and a conductor layer arranged on one side of the insulating layer in a thickness direction, the insulating layer comprising a first portion and a second portion arranged at a distance from each other in a width direction perpendicular to a longitudinal direction of the wired circuit board, and a connecting portion connecting a part of the first portion in the longitudinal direction and a part of the second portion in the longitudinal direction, the wired circuit board comprising a reinforcing portion arranged on a surface of the connecting portion and reinforcing the connecting portion, the reinforcing portion including two or more resin layers or metal members stacked in the thickness direction.

[0011] According to this configuration, the insulating layer includes a connecting portion that connects a part of the first portion in the longitudinal direction with a part of the second portion in the longitudinal direction, and the reinforcing portion is disposed on a surface of the connecting portion. The reinforcing portion includes two or more resin layers and / or metal members laminated in the thickness direction. Therefore, the connecting portion can be sufficiently reinforced.

[0012] As a result, when a load stress acts on the wired circuit board, damage to the connecting portion can be suppressed, and deformation of the wired circuit board can be stably controlled.

[0013] The present invention [2] includes the wired circuit board according to the above [1], in which the reinforcing portion includes the metal member, and the metal member is made of the same metal as the conductor layer.

[0014] According to this configuration, since the reinforcing portion includes the metal member, the connecting portion can be reliably reinforced. Furthermore, since the metal member is made of the same metal as the conductor layer, the conductor layer and the metal member can be formed simultaneously in the manufacture of the wired circuit board.

[0015] The present invention [3] includes the wired circuit board according to the above [2], in which the conductor layer includes wiring, and the wiring includes the metal member.

[0016] According to this configuration, since the wiring includes the metal member, the number of parts can be reduced compared to an embodiment in which the wiring and the metal member are provided separately. Also, by inspecting the continuity of the conductor layer, the wiring and the metal member can be inspected for formation defects at the same time.

[0017] The present invention [4] includes the wired circuit board described in [3] above, in which the conductor layer includes a first terminal and a second terminal located away from the first terminal in the longitudinal direction, and the wiring includes a wiring body connecting the first terminal and the second terminal, and the metal member continuous with the wiring body.

[0018] According to such a configuration, it is possible to ensure efficient routing of the wiring main body connecting the first terminal and the second terminal, while the metal member continuous with the wiring main body can be disposed on the connecting portion. Effect of the Invention

[0019] According to the wired circuit board of the present invention, the connecting portion can be reinforced, and deformation of the wired circuit board can be stably controlled. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 shows a plan view of a suspension board with circuit as one embodiment of the wired circuit board of the present invention. [Diagram 2] FIG. 2 shows a cross-sectional view taken along line AA of the suspension board with circuit shown in FIG. [Diagram 3] FIG. 3 shows a BB cross-sectional view of the suspension board with circuit shown in FIG. [Figure 4] FIG. 4 shows a first modified example of the reinforcing portion shown in FIG. 1 (an aspect in which the first wiring main body is routed over the connecting portion). [Diagram 5] FIG. 5 shows a second modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which the first wiring main body and the second wiring main body are routed over the connecting portion). [Figure 6] FIG. 6 shows a third modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which the first power supply wire includes a first reinforcing wire and the second power supply wire does not include a second reinforcing wire). [Figure 7] FIG. 7 shows a fourth modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which dummy wirings are disposed on the connecting portions). [Figure 8] FIG. 8 shows a fifth modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which a first reinforcing wire is connected to a first wire main body and a second wire main body). [Figure 9] Fig. 9A shows a sixth modified example (an embodiment in which the conductor layer includes a first wiring and a second wiring) of the reinforcing portion shown in Fig. 1. Fig. 9B shows a seventh modified example (an embodiment in which the conductor layer includes a third wiring and a fourth wiring) of the reinforcing portion shown in Fig. 1. [Figure 10] FIG. 10 shows a seventh modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which the conductor layer includes a first reinforcing wiring, a first wiring, and a second wiring). [Figure 11] FIG. 11 shows an eighth modified example of the reinforcing portion shown in FIG. 1 (an embodiment in which the conductor layer includes a second wiring pattern, a first wiring, and a second wiring). [Figure 12] Fig. 12A shows a ninth modified example (an embodiment in which the suspension board with circuit has a second conductor layer and a second insulating cover layer) of the reinforcing portion shown in Fig. 1. Fig. 12B shows a CC cross-sectional view of the reinforcing portion shown in Fig. 12A. [Figure 13]Fig. 13A shows a tenth modified example of the reinforcing part shown in Fig. 1 (an embodiment in which the reinforcing part is made of two resin layers and the second reinforcing cover is located between the first wiring body and the second wiring body). Fig. 13B shows a DD cross-sectional view of the reinforcing part shown in Fig. 13A. [Figure 14] FIG. 14 shows an eleventh modified example of the reinforcing portion shown in FIG. 1 (the reinforcing portion is made of two resin layers, and the second reinforcing cover overlaps the first wiring main body and the second wiring main body when viewed in the thickness direction). [Figure 15] FIG. 15 shows a twelfth modified example of the reinforcing part shown in FIG. 1 (an embodiment in which the reinforcing part is provided with a reinforcing support body). [Figure 16] FIG. 16 shows a flexible printed wiring board as another embodiment of the wired circuit board shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] A circuitized suspension board 1 as one embodiment of the wired circuit board of the present invention will be described with reference to FIGS.

[0022] As shown in FIG. 1, the suspension board with circuit 1 has a substantially flat belt shape extending in a predetermined direction.

[0023] In FIG. 1, the thickness direction of the paper surface is the thickness direction (first direction) of the suspension board with circuit 1, the front side of the paper surface is one side of the thickness direction (one side of the first direction), and the back side of the paper surface is the other side of the thickness direction (the other side of the first direction).

[0024] In Figure 1, the up-down direction of the paper is the longitudinal direction of the suspension board with circuit 1 (a second direction perpendicular to the first direction), the upper side of the paper is one side of the longitudinal direction (one side of the second direction), and the lower side of the paper is the other side of the longitudinal direction (the other side of the second direction).

[0025] 1, the left-right direction of the paper is the width direction of the suspension board with circuit 1 (third direction perpendicular to the first and second directions), the right side of the paper is one side in the width direction (one side in the third direction), and the left side of the paper is the other side in the width direction (the other side in the third direction). Specifically, the directions follow the directional arrows shown in each figure.

[0026] In the following, unless otherwise specified, the thickness direction of the suspension board with circuit 1 will be simply referred to as the thickness direction, the longitudinal direction of the suspension board with circuit 1 will be simply referred to as the longitudinal direction, and the width direction of the suspension board with circuit 1 will be simply referred to as the width direction. Note that the longitudinal direction is perpendicular to the thickness direction, and the width direction is perpendicular to both the longitudinal direction and the thickness direction.

[0027] The suspension board with circuit 1 can mount a slider 6 and a plurality of piezoelectric elements 7. The slider 6 has a magnetic head (not shown). The piezoelectric element 7 is an actuator that can expand and contract in the longitudinal direction, and expands and contracts when electricity is supplied and the voltage is controlled. The number of piezoelectric elements 7 is not particularly limited, but is two in this embodiment.

[0028] The suspension board with circuit 1 includes a first mounting area 1A and a plurality of second mounting areas 1B.

[0029] The first mounting area 1A is an area for mounting the slider 6. The first mounting area 1A is located at one end of the suspension board with circuit 1 in the longitudinal direction. The first mounting area 1A is located between the multiple second mounting areas 1B in the width direction.

[0030] The multiple second mounting regions 1B are regions for mounting piezoelectric elements 7. The multiple second mounting regions 1B are positioned at intervals from one another in the width direction.

[0031] As shown in FIG. 2, the suspension board with circuit 1 includes a metal support layer 2, a base insulating layer 3 as an example of an insulating layer, a conductor layer 4, and a cover insulating layer 5, which are arranged in this order from the other side to one side in the thickness direction.

[0032] 1-1. Metal support layer As shown in Fig. 1, the metal supporting layer 2 is a metal support that supports the conductor layer 4 and extends in the longitudinal direction. For convenience, in Fig. 1, the metal supporting layer 2 is shown by a solid line and a broken line, the base insulating layer 3 is shown by a thick line, the conductor layer 4 is shown by a solid line, and the cover insulating layer 5 is omitted.

[0033] The metal supporting layer 2 includes a gimbal portion 20 and a main body portion 21 .

[0034] The gimbal portion 20 is located at one end of the metal supporting layer 2 in the longitudinal direction. The gimbal portion 20 includes a frame portion 22, a stage 23, and a plurality of stage connecting portions 24.

[0035] The frame portion 22 has a rectangular frame shape when viewed in the thickness direction, and defines an opening 25. The frame portion 22 surrounds the stage .

[0036] The stage 23 is disposed within the opening 25 at a distance from the frame portion 22. The stage 23 has an H-shape when viewed in the thickness direction. The stage 23 includes a first stage 26, a second stage 27, and a stage connector .

[0037] The first stage 26 is located at one end in the longitudinal direction of the stage 23. The first stage 26 has a rectangular shape extending in the width direction when viewed in the thickness direction.

[0038] The second stage 27 is located at the other end of the stage 23 in the longitudinal direction. The second stage 27 is located on the other side in the longitudinal direction with a gap between it and the first stage 26. The second stage 27 has a rectangular shape extending in the width direction when viewed in the thickness direction.

[0039] The stage connector 28 is located in the longitudinal direction between the first stage 26 and the second stage 27. The stage connector 28 connects a widthwise central portion of the other end edge of the first stage 26 in the longitudinal direction to a widthwise central portion of one end edge of the second stage 27 in the longitudinal direction.

[0040] The multiple stage connection parts 24 connect the second stage 27 and the frame part 22. The multiple stage connection parts 24 are specifically two stage connection parts 24. The two stage connection parts 24 are located at an interval from each other in the width direction. Of the two stage connection parts 24, the stage connection part 24 located on one side in the width direction extends continuously in the longitudinal direction from one end part of the second stage 27 in the width direction and is connected to the frame part 22. Of the two stage connection parts 24, the stage connection part 24 located on the other side in the width direction extends continuously in the longitudinal direction from the other end part of the second stage 27 in the width direction and is connected to the frame part 22.

[0041] The second stage 27 and the two stage connecting portions 24 divide the opening 25 into a first opening 25A and a second opening 25B.

[0042] The first opening 25A is located on one side of the second stage 27 in the longitudinal direction. The first opening 25A is defined by one end edge of the second stage 27 in the longitudinal direction, one end edges of the two stage connecting portions 24 in the longitudinal direction, and the inner end edge of the frame portion 22. The first stage 26 and the stage connecting portion 28 are located within the first opening 25A.

[0043] The second opening 25B is located on the other side in the longitudinal direction relative to the second stage 27. The second opening 25B is defined by the other end edge of the second stage 27 in the longitudinal direction, the other end edges of the two stage connection portions 24 in the longitudinal direction, and the inner end edge of the frame portion 22.

[0044] The main body portion 21 is a portion supported by a load beam (not shown). The main body portion 21 is located on the other side of the gimbal portion 20 in the longitudinal direction. The main body portion 21 has a flat belt shape extending in the longitudinal direction. The main body portion 21 is continuous with the other end portion of the frame portion 22 in the longitudinal direction.

[0045] Examples of the material for the metal supporting layer 2 include metal materials such as stainless steel. The thickness of the metal supporting layer 2 is not particularly limited, but is, for example, 10 μm or more and 35 μm or less.

[0046] 1-2. Base insulation layer 2, the base insulating layer 3 is disposed on one side of the metal supporting layer 2 in the thickness direction, specifically, on one surface in the thickness direction of the metal supporting layer 2. The base insulating layer 3 has a predetermined pattern corresponding to the conductor layer 4. The base insulating layer 3 is located between the metal supporting layer 2 and the conductor layer 4 in the thickness direction.

[0047] As shown in FIG. 1, the base insulating layer 3 includes a stage base 30, a first main body base 31 as an example of a first portion, a second main body base 32 as an example of a second portion, and a connecting portion 33.

[0048] The stage base 30 is located on the stage 23. The stage base 30 includes a first stage base 34, a second stage base 35, and a stage base connection portion 36.

[0049] The first stage base 34 is located on the first stage 26. The first stage base 34 has a rectangular shape extending in the width direction when viewed in the thickness direction.

[0050] The second stage base 35 is located on the other side of the first stage base 34 in the longitudinal direction with a gap therebetween. The second stage base 35 has a rectangular shape extending in the width direction when viewed in the thickness direction. When viewed in the thickness direction, the second stage base 35 overlaps the stage coupling portion 28, one side portion of the second stage 27 in the longitudinal direction, and the two stage connection portions 24 collectively.

[0051] The stage base connecting portion 36 is located between the first stage base 34 and the second stage base 35 in the longitudinal direction. The stage base connecting portion 36 connects a widthwise central portion of the other end edge of the first stage base 34 in the longitudinal direction to a widthwise central portion of one end edge of the second stage base 35 in the longitudinal direction.

[0052] The first main body base 31 and the second main body base 32 are located on the other side in the longitudinal direction with respect to the second stage base 35. The first main body base 31 and the second main body base 32 are disposed with an interval between them in the width direction.

[0053] The first main body base 31 is located on one side in the width direction relative to the second main body base 32. The first main body base 31 has a flat band shape extending in the longitudinal direction. The first main body base 31 has a first unsupported portion 31A and a first supported portion 31B.

[0054] The first unsupported portion 31A is located at one end of the first main body base 31 in the longitudinal direction. The first unsupported portion 31A overlaps with the second opening 25B when viewed in the thickness direction. Therefore, the first unsupported portion 31A is not supported by the metal support layer 2. The first unsupported portion 31A has a crank shape when viewed in the thickness direction. More specifically, the first unsupported portion 31A is continuous from one end of the second stage base 35 in the width direction, extends to the other side in the longitudinal direction, then bends to the other side in the width direction, and then bends to the other side in the longitudinal direction.

[0055] The first supported portion 31B is located on the other side of the first unsupported portion 31A in the longitudinal direction. The first supported portion 31B overlaps with the main body portion 21 when viewed in the thickness direction. The first supported portion 31B is located on the main body portion 21. Therefore, the first supported portion 31B is supported by the main body portion 21. The first supported portion 31B extends along the longitudinal direction. One end of the first supported portion 31B in the longitudinal direction is connected to the other end of the first unsupported portion 31A in the longitudinal direction.

[0056] The second main body base 32 has a flat band shape extending in the longitudinal direction. The second main body base 32 has a second unsupported portion 32A and a second supported portion 32B.

[0057] The second unsupported portion 32A is located at one end of the second main body base 32 in the longitudinal direction. The second unsupported portion 32A overlaps with the second opening 25B when viewed from the thickness direction. Therefore, the second unsupported portion 32A is not supported by the metal support layer 2. The second unsupported portion 32A is located on the other side of the first unsupported portion 31A in the width direction with a gap therebetween. The second unsupported portion 32A has a crank shape when viewed from the thickness direction. In detail, the second unsupported portion 32A is continuous from the other end of the second stage base 35 in the width direction, extends to the other side in the longitudinal direction, then bends to one side in the width direction, and then bends to the other side in the longitudinal direction.

[0058] The second supported portion 32B is located on the other side of the second unsupported portion 32A in the longitudinal direction. The second supported portion 32B overlaps with the main body portion 21 when viewed in the thickness direction. The second supported portion 32B is located on the main body portion 21. Therefore, the second supported portion 32B is supported by the main body portion 21. The second supported portion 32B is located on the other side of the first supported portion 31B in the width direction with a gap therebetween. The second supported portion 32B extends along the longitudinal direction. One end of the second supported portion 32B in the longitudinal direction is connected to the other end of the second unsupported portion 32A in the longitudinal direction.

[0059] The connecting portion 33 connects a part of the first main body base 31 in the longitudinal direction and a part of the second main body base 32 in the longitudinal direction. More specifically, the connecting portion 33 connects a part of the first unsupported portion 31A and a part of the second unsupported portion 32A. The connecting portion 33 is located between the first unsupported portion 31A and the second unsupported portion 32A. The connecting portion 33 overlaps with the second opening 25B when viewed from the thickness direction. The connecting portion 33 has a rectangular shape extending in the width direction when viewed from the thickness direction. The connecting portion 33, the part of the first unsupported portion 31A continuous with the connecting portion 33, and the second unsupported portion 32A continuous with the connecting portion 33 have an H shape when viewed from the thickness direction. In this embodiment, the connecting portion 33 is shorter in the longitudinal direction than the first unsupported portion 31A and the second unsupported portion 32A. The connecting portion 33 may be longer than the first unsupported portion 31A and the second unsupported portion 32A in the longitudinal direction.

[0060] The material of the base insulating layer 3 may be, for example, a synthetic resin such as a polyimide resin.

[0061] The thickness of the base insulating layer 3 is not particularly limited, but is, for example, not less than 1 μm and not more than 1000 μm.

[0062] 1-3. Conductive layer As shown in FIG. 2, the conductor layer 4 is disposed on one side of the base insulating layer 3 in the thickness direction, specifically, on one surface of the base insulating layer 3 in the thickness direction.

[0063] As shown in FIG. 1, the conductor layer 4 includes a first wiring pattern 40 and a second wiring pattern 41.

[0064] The first wiring pattern 40 includes a plurality of slider connection terminals 42, a plurality of external connection terminals 43, and a plurality of signal wires 44.

[0065] When the slider 6 is mounted on the suspension board with circuit 1, the plurality of slider connection terminals 42 are electrically connected to the slider 6 via a bonding material (eg, solder, etc.).

[0066] The plurality of slider connection terminals 42 are located at one end of the suspension board with circuit 1 in the longitudinal direction. Specifically, the plurality of slider connection terminals 42 are four slider connection terminals 42. Note that, in this embodiment, the number of the slider connection terminals 42 is four for convenience, but is not particularly limited.

[0067] The multiple slider connection terminals 42 are disposed on the first stage base 34. In this embodiment, the multiple slider connection terminals 42 are disposed adjacent to the first mounting area 1A. More specifically, the multiple slider connection terminals 42 are disposed adjacent to one side of the first mounting area 1A in the longitudinal direction. Note that the multiple slider connection terminals 42 may be disposed within the first mounting area 1A.

[0068] The plurality of slider connection terminals 42 are positioned at intervals from each other in the width direction. The plurality of slider connection terminals 42 include a plurality of first slider connection terminals 42A and a plurality of second slider connection terminals 42B. The plurality of first slider connection terminals 42A and the plurality of second slider connection terminals 42B are positioned at intervals from each other in the width direction. The plurality of first slider connection terminals 42A are specifically two first slider connection terminals 42A. The plurality of second slider connection terminals 42B are specifically two second slider connection terminals 42B. Note that the number of each of the first slider connection terminals 42A and the second slider connection terminals 42B is two in this embodiment for convenience, but is not particularly limited. The plurality of first slider connection terminals 42A are positioned on one side in the width direction, and the plurality of second slider connection terminals 42B are positioned on the other side in the width direction.

[0069] The plurality of external connection terminals 43 are electrically connected to an external board (not shown) in a state in which the main body portion 21 is supported by a load beam (not shown).

[0070] The external connection terminals 43 are located at the other end of the suspension board with circuit 1 in the longitudinal direction. The external connection terminals 43 are provided in the same number as the slider connection terminals 42. The external connection terminals 43 include a plurality of first external connection terminals 43A and a plurality of second external connection terminals 43B. The first external connection terminals 43A and the second external connection terminals 43B are located at intervals from each other in the width direction. The first external connection terminals 43A are provided in the same number as the first slider connection terminals 42A. The second external connection terminals 43B are provided in the same number as the second slider connection terminals 42B. The first external connection terminals 43A are located on one side in the width direction, and the second external connection terminals 43B are located on the other side in the width direction. The first external connection terminals 43A are disposed on the other end of the first supported portion 31B in the longitudinal direction. The second external connection terminals 43B are disposed on the other end of the second supported portion 32B in the longitudinal direction.

[0071] The signal wirings 44 electrically connect the slider connection terminals 42 and the external connection terminals 43. The signal wirings 44 include first signal wirings 44A and second signal wirings 44B. The first signal wirings 44A and the second signal wirings 44B are arranged at intervals in the width direction. The first signal wirings 44A are located on one side in the width direction, and the second signal wirings 44B are located on the other side in the width direction.

[0072] The first signal wirings 44A electrically connect the first slider connection terminals 42A and the first external connection terminals 43A. The first signal wirings 44A extend in the longitudinal direction and are spaced apart from one another in the width direction. The first signal wirings 44A are continuous from the first slider connection terminals 42A, pass over the first stage base 34, the second stage base 35, and the first main body base 31 in this order, and are connected to the first external connection terminals 43A.

[0073] The second signal wirings 44B electrically connect the second slider connection terminals 42B and the second external connection terminals 43B. The second signal wirings 44B extend in the longitudinal direction and are spaced apart from one another in the width direction. The second signal wirings 44B are continuous from the second slider connection terminals 42B, pass over the first stage base 34, the second stage base 35, and the second main body base 32 in this order, and are connected to the second external connection terminals 43B.

[0074] The second wiring pattern 41 includes a plurality of element connection terminals 45, a plurality of power supply terminals 47 as an example of second terminals, a plurality of power supply wires 48 as an example of wires, and a plurality of ground wires 49.

[0075] The element connection terminals 45 are electrically connected to the piezoelectric elements 7 via a bonding material (e.g., solder) when the piezoelectric elements 7 are mounted on the suspension board with circuit 1. Specifically, the element connection terminals 45 are four element connection terminals 45. Two element connection terminals 45 are arranged in each second mounting area 1B. Note that, in this embodiment, the number of element connection terminals 45 is four for convenience, but is not particularly limited.

[0076] The multiple element connection terminals 45 arranged in each second mounting area 1B include a first element connection terminal 45A as an example of a first terminal, and a second element connection terminal 45B. In other words, the first element connection terminal 45A and the second element connection terminal 45B are arranged in the second mounting area 1B. Note that the first element connection terminal 45A and the second element connection terminal 45B may be arranged adjacent to the second mounting area 1B.

[0077] The first element connection terminal 45A is located at the other end of the second mounting area 1B in the longitudinal direction. The first element connection terminal 45A is located on the other end of the second stage base 35 in the longitudinal direction. The second element connection terminal 45B is located at one end of the second mounting area 1B in the longitudinal direction. The second element connection terminal 45B is located on one side of the first element connection terminal 45A in the longitudinal direction with a gap therebetween. The second element connection terminal 45B is located on the other end of the first stage base 34 in the longitudinal direction.

[0078] The power supply terminals 47 are electrically connected to an external power supply (not shown) in a state in which the main body 21 is supported by a load beam (not shown).

[0079] The power supply terminals 47 are located at the other end of the suspension board with circuit 1 in the longitudinal direction. The power supply terminals 47 are located away from the first element connection terminal 45A in the longitudinal direction. The number of the power supply terminals 47 is the same as the number of the first element connection terminals 45A. The power supply terminals 47 are located at intervals from each other in the width direction. The power supply terminals 47 include a first power supply terminal 47A and a second power supply terminal 47B. The first power supply terminal 47A is located on one side in the width direction, and the second power supply terminal 47B is located on the other side in the width direction. The first power supply terminal 47A is located on the other side of the first external connection terminal 43A in the width direction. The first power supply terminal 47A is disposed on the other end of the first support portion 31B in the longitudinal direction. The second power supply terminal 47B is located on one side of the second external connection terminal 43B in the width direction. The second power terminal 47B is disposed on the other end of the second supported portion 32B in the longitudinal direction.

[0080] The multiple power supply wirings 48 include a first power supply wiring 48A and a second power supply wiring 48B. The first power supply wiring 48A and the second power supply wiring 48B are arranged at intervals in the width direction. The first power supply wiring 48A is located on one side in the width direction, and the second power supply wiring 48B is located on the other side in the width direction.

[0081] The first power supply wiring 48A includes a first wiring body 48C as an example of a wiring body, and a first reinforcing wiring 48D as an example of a metal member. In other words, the first reinforcing wiring 48D is a part of the conductor layer 4 and is made of the same metal as the conductor layer 4.

[0082] The first wiring main body 48C electrically connects the first element connecting terminal 45A, which is located on one side in the width direction of the two first element connecting terminals 45A, to the first power supply terminal 47A. The first wiring main body 48C is continuous from the first element connecting terminal 45A, passes over the second stage base 35 and the first main body base 31 in this order, and is connected to the first power supply terminal 47A. The first wiring main body 48C is located on the other side in the width direction of the first signal wiring 44A on the first unsupported portion 31A.

[0083] The first reinforcing wire 48D is disposed on one surface of the connecting portion 33 in the thickness direction. The first reinforcing wire 48D extends in the width direction. The first reinforcing wire 48D branches out so as to be continuous with the first wiring body 48C located on the first unsupported portion 31A, and extends toward the other side in the width direction. One end of the first reinforcing wire 48D in the width direction is located on the first unsupported portion 31A and connected to the first wiring body 48C. The other end of the first reinforcing wire 48D in the width direction is a free end, that is, it is located on the second unsupported portion 32A and is disposed at a distance from a second wiring body 48E described later.

[0084] The second power supply wiring 48B includes a second wiring body 48E as an example of a wiring body and a second reinforcing wiring 48F as an example of a metal member. In other words, the second reinforcing wiring 48F is a part of the conductor layer 4 and is made of the same metal as the conductor layer 4.

[0085] The second wiring body 48E electrically connects the first element connecting terminal 45A, which is located on the other side in the width direction of the two first element connecting terminals 45A, to the second power supply terminal 47B. The second wiring body 48E is continuous from the first element connecting terminal 45A, passes over the second stage base 35 and the second body base 32 in this order, and is connected to the second power supply terminal 47B. The second wiring body 48E is located on one side in the width direction of the second signal wiring 44B on the second unsupported portion 32A.

[0086] The second reinforcing wire 48F is disposed on one surface of the connecting portion 33 in the thickness direction. The second reinforcing wire 48F is located in parallel to the first reinforcing wire 48D in the longitudinal direction and spaced apart from one side. The second reinforcing wire 48F extends in the width direction. The second reinforcing wire 48F branches out so as to be continuous with the second wiring main body 48E located on the second unsupported portion 32A, and extends toward one side in the width direction. The other end of the second reinforcing wire 48F in the width direction is located on the second unsupported portion 32A and connected to the second wiring main body 48E. One end of the second reinforcing wire 48F in the width direction is a free end, that is, it is located on the first unsupported portion 31A and spaced apart from the first wiring main body 48C.

[0087] The ground wiring 49 is connected to the second element connection terminal 45B, and electrically connects (grounds) the second element connection terminal 45B and the first stage 26. The multiple ground wirings 49 are positioned at intervals from one another in the width direction. The ground wiring 49 extends from the second element connection terminal 45B to one side in the longitudinal direction. The ground wiring 49 contacts (grounds) the first stage 26 through a hole (not shown) that the first stage base 34 has.

[0088] Examples of the material for the conductor layer 4 include conductor materials such as copper. The thickness of the conductor layer 4 is, for example, 1 μm or more, preferably 3 μm or more, for example, 20 μm or less, preferably 12 μm or less.

[0089] 1-4.Cover insulation layer As shown in FIGS. 2 and 3, the cover insulating layer 5 is disposed on one side in the thickness direction of the base insulating layer 3, specifically, on one surface in the thickness direction of the base insulating layer 3 so as to cover the conductor layer 4.

[0090] The cover insulating layer 5 covers the first wiring pattern 40 so as to expose the plurality of slider connection terminals 42 and the plurality of external connection terminals 43. The cover insulating layer 5 also covers the second wiring pattern 41 so as to expose the plurality of element connection terminals 45 and the plurality of power supply terminals 47. As a result, as shown in FIG 3, the cover insulating layer 5 covers the first reinforcing wires 48D and the second reinforcing wires 48F.

[0091] In detail, the cover insulating layer 5 has a reinforcing cover 50. The reinforcing cover 50 is disposed on one surface in the thickness direction of the coupling portion 33 so as to cover the first reinforcing wires 48D and the second reinforcing wires 48F.

[0092] Examples of materials for the insulating cover layer 5 include synthetic resins such as polyimide resins. The insulating cover layer 5 has a thickness of, for example, 1 μm or more, preferably 2 μm or more, for example, 10 μm or less, preferably 8 μm or less.

[0093] 1-5. Reinforcement The suspension board with circuit 1 includes a reinforcing portion 10. The reinforcing portion 10 reinforces the connecting portion 33. The reinforcing portion 10 is disposed on a surface of the connecting portion 33. More specifically, the reinforcing portion 10 is disposed on one side of the connecting portion 33 in the thickness direction.

[0094] In the present embodiment, the reinforcing portion 10 includes the first reinforcing wire 48D, the second reinforcing wire 48F, and the reinforcing cover 50 described above.

[0095] 1 and 3, in the suspension board with circuit 1, the base insulating layer 3 includes a connecting portion 33 that connects a part of the first unsupported portion 31A and a part of the second unsupported portion 32A, and the reinforcing portion 10 is disposed on the surface of the connecting portion 33. The reinforcing portion 10 includes a first reinforcing wiring 48D and a second reinforcing wiring 48F. Therefore, the connecting portion 33 can be sufficiently reinforced.

[0096] The suspension board with circuit 1, with the slider 6 and the piezoelectric element 7 mounted thereon, is mounted on a hard disk drive (not shown). The suspension board with circuit 1 supports the magnetic head of the slider 6 while maintaining a minute gap between it and the magnetic disk against the airflow that occurs when the magnetic head and the magnetic disk move relative to each other. At this time, electricity may be supplied to the piezoelectric element 7 to expand and contract the piezoelectric element 7, as necessary, to move the stage 23 up and down relative to the magnetic disk, thereby displacing the slider 6.

[0097] In this case, the first unsupported portion 31A and the second unsupported portion 32A are deformed in accordance with the movement of the stage 23. This may cause a load stress to act on the connecting portion 33.

[0098] However, in the suspension board with circuit 1, the connecting portions 33 are sufficiently reinforced by the reinforcing portions 10, so that damage to the connecting portions 33 can be suppressed and deformation of the suspension board with circuit 1 can be stably controlled.

[0099] Moreover, the first reinforcing wiring 48D and the second reinforcing wiring 48F are part of the conductor layer 4 and are made of the same metal as the conductor layer 4. Therefore, in manufacturing the suspension board with circuit 1, the conductor layer 4 including the first reinforcing wiring 48D and the second reinforcing wiring 48F can be formed in the above pattern all at once by, for example, an additive method or a subtractive method.

[0100] Furthermore, the first power supply wiring 48A includes a first wiring main body 48C and a first reinforcing wiring 48D, and the second power supply wiring 48B includes a second wiring main body 48E and a second reinforcing wiring 48F. Therefore, the first reinforcing wiring 48D and the second reinforcing wiring 48F can be disposed on the coupling portion 33 while ensuring efficient routing of the first wiring main body 48C and the second wiring main body 48E. Furthermore, by inspecting the continuity of the power supply wiring 48, it is possible to inspect all at once for defects in the formation of the first wiring main body 48C and the second wiring main body 48E and for defects in the formation of the first reinforcing wiring 48D and the second reinforcing wiring 48F.

[0101] <Modification> In the above embodiment, the power supply wiring 48 includes reinforcing wiring (first reinforcing wiring 48D, second reinforcing wiring 48F) as an example of a metal member, but the wiring including a metal member is not limited to this. The wiring including a metal member may be a signal wiring, a ground wiring electrically connected to the metal support layer 2, or a dummy wiring not connected to a terminal.

[0102] In the embodiment described above, the first power supply wire 48A includes the first wire main body 48C and the first reinforcing wire 48D, but the wire of the present invention is not limited to this.

[0103] 4, first power supply wire 48A may not include first reinforcing wire 48D and may be made of first wire main body 48C. In this case, first wire main body 48C is routed in a U-shape so as to pass over coupling portion 33. The portion of first wire main body 48C located over coupling portion 33 corresponds to the metal member.

[0104] 4 to 6, second power supply wire 48B may not include second reinforcing wire 48F and may be made of second wiring body 48E. When first power supply wire 48A includes a metal member located on connecting portion 33, second wiring body 48E does not have to be routed over connecting portion 33 (see FIGS. 4 and 6), or may be routed over connecting portion 33 (see FIG. 5).

[0105] As shown in Fig. 7, a dummy wiring 55 as an example of a metal member may be disposed on the coupling portion 33 in place of the first reinforcing wiring 48D. The dummy wiring 55 is not connected to the first wiring main body 48C and the second wiring main body 48E. In the embodiment shown in Fig. 7, pattern formation of the conductor layer 4 is more difficult than in the above-described embodiment. Therefore, the above-described embodiment is more preferable.

[0106] 8, the first reinforcing wiring 48D may be connected to a first wiring main body 48C and a second wiring main body 48E. In this case, each of the first wiring main body 48C and the second wiring main body 48E is a circuit that allows conduction or a dummy wiring.

[0107] Furthermore, as shown in FIGS. 9A and 9B, the layout of the wiring including the metal member is not particularly limited as long as it is laid out so as to pass over the coupling portion 33.

[0108] 9A, the first wiring 51 extends toward the other side in the longitudinal direction over the first unsupported portion 31A, then bends toward the other side in the width direction and is routed to pass over the connecting portion 33, and then bends toward one side in the longitudinal direction over the second unsupported portion 32A. The portion of the first wiring 51 located over the connecting portion 33 corresponds to the metal member.

[0109] The second wiring 52 is located on the other side in the longitudinal direction relative to the first wiring 51. The second wiring 52 extends toward one side in the longitudinal direction over the first unsupported portion 31A, then bends toward the other side in the width direction and is routed to pass over the connecting portion 33, and then bends toward the other side in the longitudinal direction over the second unsupported portion 32A. The portion of the second wiring 52 located on the connecting portion 33 corresponds to the metal member.

[0110] 9B, the third wiring 53 extends over the second unsupported portion 32A toward the other side in the longitudinal direction, then bends to one side in the width direction and is routed to pass over the connecting portion 33, then bends to make a U-turn over the second unsupported portion 32A, and extends toward the other side in the longitudinal direction. The portion of the third wiring 53 located over the connecting portion 33 corresponds to the metal member.

[0111] The fourth wiring 54 extends toward the other side in the longitudinal direction over the second unsupported portion 32A, then extends to make a U-turn, and then bends to one side in the width direction and is routed to pass over the connecting portion 33, and bends toward the other side in the longitudinal direction over the first unsupported portion 31A. The portion of the fourth wiring 54 located on the connecting portion 33 corresponds to the metal member.

[0112] 10, in the embodiment of FIG. 9A, the conductor layer 4 may include a dummy wiring 55 in addition to the first wiring 51 and the second wiring 52. The dummy wiring 55 is located between the first wiring 51 and the second wiring 52 on the coupling portion 33.

[0113] Also, as shown in FIG. 11, in the embodiment of FIG. 8, when the first wiring body 48C and the second wiring body 48E are dummy wirings, the conductor layer 4 may include a first wiring 51 and a second wiring 52 in addition to the second wiring pattern 41.

[0114] Furthermore, as shown in Figures 12A and 12B, the suspension board with circuit 1 may further include a second conductor layer 8 and a second cover insulating layer 9 in addition to the metal support layer 2 (see Figure 2), the base insulating layer 3, the conductor layer 4, and the cover insulating layer 5.

[0115] The second conductor layer 8 is disposed on one side in the thickness direction of the cover insulating layer 5, specifically, on one surface in the thickness direction of the cover insulating layer 5. The second conductor layer 8 includes reinforcing wires 80 as an example of a metal member.

[0116] The reinforcing wires 80 extend in the width direction. The reinforcing wires 80 are disposed so as to overlap the first wire main body 48C, the connecting portion 33, and the second wire main body 48E collectively when viewed in the thickness direction.

[0117] The second cover insulating layer 9 is disposed on one side in the thickness direction of the cover insulating layer 5, specifically, on one surface in the thickness direction of the cover insulating layer 5, so as to cover the second conductor layer 8. The second cover insulating layer 9 has a second reinforcing cover 90. The second reinforcing cover 90 is disposed on one surface in the thickness direction of the reinforcing cover 50 so as to cover the reinforcing wiring 80.

[0118] 12B, in this modification, the reinforcing portion 10 includes the reinforcing cover 50, the reinforcing wire 80, and the second reinforcing cover 90. In other words, the reinforcing portion 10 includes the reinforcing cover 50 and the second reinforcing cover 90 as two resin layers stacked in the thickness direction, and the reinforcing wire 80 as a metal member.

[0119] 13A and 13B, the reinforcing part 10 may be composed of two or more resin layers laminated in the thickness direction. As shown in Fig. 13B, in this modification, the reinforcing part 10 is composed of a reinforcing cover 50 and a second reinforcing cover 90. In this modification, the second reinforcing cover 90 is located between the first wiring main body 48C and the second wiring main body 48E in the width direction.

[0120] Although not shown, the reinforcing portion 10 may include a first reinforcing wire 48D and / or a second reinforcing wire 48F in addition to the reinforcing cover 50 and the second reinforcing cover 90. In this case, the second reinforcing cover 90 overlaps with the first reinforcing wire 48D and / or the second reinforcing wire 48F when viewed in the thickness direction.

[0121] 14, the dimension of the second reinforcing cover 90 in the width direction is not particularly limited, and the second reinforcing cover 90 may be disposed so as to overlap the first wiring main body 48C, the connecting portion 33, and the second wiring main body 48E collectively when viewed in the thickness direction. According to this modification, damage to the reinforcing portion 10 can be suppressed compared to the embodiment shown in FIGS. 13A and 13B.

[0122] 15, the reinforcing portion 10 may include a reinforcing support 29 made of the same metal as the metal supporting layer 2. The reinforcing support 29 is disposed on the other surface of the connecting portion 33 in the thickness direction.

[0123] In the above-described embodiment, the suspension board with circuit 1 is given as an example of the wired circuit board, but the wired circuit board is not limited to the suspension board with circuit 1. As shown in Fig. 16, the wired circuit board may be a flexible printed wiring board 100 that does not include the metal support layer 2.

[0124] Even with such a modification, it is possible to obtain the same effects as those of the above-described embodiment. Furthermore, the embodiment and the modification can be appropriately combined. [Explanation of symbols]

[0125] 1. Circuit-equipped suspension board 10 Reinforcement 3 Base insulation layer 31 First body base 32 2nd body base 33 Connecting part 4 Conductor Layer 45 Element connection terminal 47 Power terminal 48 Power wiring 48C First wiring body 48D 1st reinforcement wiring 48E 2nd wiring body 48F 2nd reinforcement wiring

Claims

1. A printed circuit board extending in a predetermined direction, An insulating layer; a conductor layer disposed on one side of the insulating layer in a thickness direction, The insulating layer is a first portion and a second portion arranged at an interval from each other in a width direction perpendicular to a longitudinal direction of the wired circuit board; a connecting portion connecting a part of the first portion in the longitudinal direction and a part of the second portion in the longitudinal direction, the wired circuit board includes a reinforcing portion disposed on a surface of the connecting portion and reinforcing the connecting portion, The wired circuit board, wherein the reinforcing portion includes two or more resin layers and / or metal members laminated in the thickness direction.

2. The reinforcing portion includes the metal member, 2. The printed circuit board according to claim 1, wherein the metal member is made of the same metal as the conductor layer.

3. The conductor layer includes wiring, The printed circuit board according to claim 2 , wherein the wiring includes the metal member.

4. the conductor layer includes a first terminal and a second terminal located away from the first terminal in the longitudinal direction; The wiring is a wiring body connecting the first terminal and the second terminal; The wired circuit board according to claim 3 , further comprising: the metal member continuous with the wiring body.

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