Wired circuit board

Abstract

A wiring circuit board 1 comprises a first insulating layer 3 and a conductor pattern 4. The conductor pattern 4 has a first terminal 41A and wiring 43A that is connected to the first terminal 41A. The wiring 43A has a first portion 431 that is disposed so as to be separated from the first terminal 41A and a second portion 432 that is disposed between the first terminal 41A and the first portion 431. The first portion 431 of the wiring 43A and the first terminal 41A include a portion comprising a first conductor layer 4A and a second conductor layer 4B. The second portion 432 of the wiring 43A comprises the first conductor layer 4A.

Description

[Technical Field]

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

[0002] Conventionally, a printed circuit board includes a first insulating layer and a conductor pattern. The conductor pattern is disposed on the first insulating layer. The conductor pattern has terminals and wiring. The wiring is connected to the terminals. The terminals are made up of a first conductor layer disposed on the first insulating layer and a second conductor layer disposed on the first conductor layer (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-212349 Summary of the Invention [Problem to be solved by the invention]

[0004] In a wired circuit board such as that described in Patent Document 1, there is a demand for reinforcing desired portions while ensuring ease of connection (mountability) with electronic components.

[0005] The present invention provides a wired circuit board that can reinforce desired portions while ensuring mountability. [Means for solving the problem]

[0006] The present invention [1] includes a wired circuit board comprising: a first insulating layer; and a conductor pattern disposed on the first insulating layer, the conductor pattern having a terminal; and wiring connected to the terminal, the wiring having a first portion disposed away from the terminal and a second portion disposed between the terminal and the first portion; the conductor pattern having a first conductor layer disposed on the first insulating layer and a second conductor layer disposed on the first conductor layer; the first portion of the wiring and the terminal include portions formed from the first conductor layer and the second conductor layer; and the second portion of the wiring is formed from the first conductor layer or the second conductor layer.

[0007] According to this configuration, the first portion of the wiring that is disposed away from the terminal includes a portion made up of the first conductor layer and the second conductor layer.

[0008] This makes it possible to use a part (first part) of the wiring to reinforce a desired part of the wired circuit board.

[0009] The terminal includes a portion made of a first conductor layer and a second conductor layer, and the second portion disposed between the terminal and the first portion is made of the first conductor layer or the second conductor layer.

[0010] Therefore, when an electronic component is mounted on the terminal, the second portion of the wiring is prevented from coming into contact with the electronic component, thereby ensuring reliable contact between the second conductor layer of the terminal and the electronic component.

[0011] As a result, the terminals can be reliably connected to the electronic components, which means that the mountability of the printed circuit board can be ensured.

[0012] In summary, desired portions can be reinforced while ensuring mountability. The present invention [2] includes a wired circuit board having a first insulating layer, a terminal arranged on the first insulating layer, and wiring connected to the terminal, the wiring having a first portion arranged away from the terminal and a second portion arranged between the terminal and the first portion, a conductor pattern having a first conductor layer arranged on the first insulating layer and a second conductor layer arranged on the first conductor layer, and an intermediate insulating layer arranged between the first conductor layer and the second conductor layer, wherein the terminal includes a portion consisting of the first conductor layer, the second conductor layer, and the intermediate insulating layer, the first portion of the wiring includes a portion consisting of the first conductor layer and the second conductor layer, and the second portion of the wiring includes at least one of the first conductor layer and the second conductor layer. According to this configuration, the first portion of the wiring that is disposed away from the terminal includes a portion made up of the first conductor layer and the second conductor layer. This makes it possible to use a part (first part) of the wiring to reinforce a desired part of the wired circuit board. The terminal also includes a portion made up of the first conductor layer, the second conductor layer, and the intermediate insulating layer, and the second portion disposed between the terminal and the first portion is made up of at least one of the first conductor layer and the second conductor layer. Therefore, when an electronic component is mounted on the terminal, the second portion of the wiring is prevented from coming into contact with the electronic component, thereby ensuring reliable contact between the second conductor layer of the terminal and the electronic component. As a result, the terminals can be reliably connected to the electronic components, which means that the mountability of the printed circuit board can be ensured. In summary, desired portions can be reinforced while ensuring mountability.

[0013] The present invention [3] includes the wired circuit board according to the above [1] or [2], wherein the width of the first portion is greater than the width of the second portion.

[0014] According to this configuration, the cross-sectional area of ​​the first portion of the wiring can be increased, thereby reducing the electrical resistance of the wiring.

[0015] The present invention [4] includes the wired circuit board of any one of [1] to [3] above, further comprising a second insulating layer disposed on the first insulating layer and covering the wiring, the second insulating layer being disposed at a distance from the terminal.

[0016] With this configuration, when an electronic component is mounted on the terminal, the second insulating layer can be prevented from coming into contact with the electronic component.

[0017] As a result, the mountability of the printed circuit board can be further improved.

[0018] The present invention [5] includes the wired circuit board according to the above [4], wherein the second insulating layer disposed on the second portion is thinner than the second conductor layer of the terminal.

[0019] With this configuration, when an electronic component is mounted on the terminal, the second insulating layer can be further prevented from coming into contact with the electronic component.

[0020] As a result, the mountability of the printed circuit board can be further improved.

[0021] The present invention [6] includes the wired circuit board of any one of [1] to [3] above, further comprising a second insulating layer disposed on the first insulating layer and covering the wiring, wherein the second insulating layer disposed on the second portion is thinner than the second conductor layer of the terminal.

[0022] With this configuration, when an electronic component is mounted on the terminal, the second insulating layer can be prevented from coming into contact with the electronic component.

[0023] As a result, the mountability of the printed circuit board can be further improved.

[0024] The present invention [7] includes the wired circuit board of any one of the above [1] to [6], wherein the second portion of the wiring is made of the first conductor layer, and the entire second conductor layer is in contact with the first conductor layer.

[0025] According to this configuration, the cross-sectional area of ​​the first portion of the wiring can be increased, thereby reducing the electrical resistance of the wiring. The present invention [8] includes the wired circuit board of any one of the above [1] to [6], wherein the second portion of the wiring is made of the second conductor layer, and the entire first conductor layer is in contact with the second conductor layer. According to this configuration, the cross-sectional area of ​​the first portion of the wiring can be increased, thereby reducing the electrical resistance of the wiring. [Effects of the Invention]

[0026] According to the wired circuit board of the present invention, desired portions can be reinforced while ensuring mountability. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a plan view of a printed circuit board according to one embodiment of the present invention. [Figure 2] Fig. 2A is a cross-sectional view taken along line AA of the printed circuit board shown in Fig. 1. Fig. 2B is a cross-sectional view taken along line BB of the printed circuit board shown in Fig. 1. [Figure 3] FIG. 3 is an explanatory diagram illustrating the first modified example. [Figure 4] FIG. 4 is an explanatory diagram illustrating the second modified example. [Figure 5] FIG. 5 is an explanatory diagram illustrating the third modified example. [Figure 6] FIG. 6 is an explanatory diagram illustrating the fourth modified example. [Figure 7] FIG. 7 is an explanatory diagram illustrating the fifth modified example. [Figure 8] FIG. 8 is an explanatory diagram illustrating the sixth modified example. [Figure 9] FIG. 9 is an explanatory diagram illustrating the seventh modified example. [Figure 10] FIG. 10 is an explanatory diagram illustrating the eighth modified example. [Figure 11]Fig. 11A is an explanatory diagram illustrating a ninth modified example. Fig. 11B is an explanatory diagram illustrating a tenth modified example. Fig. 11C is an explanatory diagram illustrating an eleventh modified example. Fig. 11D is an explanatory diagram illustrating a twelfth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0028] 1. Wiring circuit board As shown in FIG. 1, a wired circuit board 1 according to one embodiment of the present invention extends in a first direction. The wired circuit board 1 is a flexible wired circuit board. The wired circuit board 1 has a sheet shape. The wired circuit board 1 has a first end 11, a second end 12, and a plurality of flexible portions 13A, 13B, 13C, and 13D. The number of flexible portions is not limited.

[0029] The first end 11 is one end of the wired circuit board 1 in the first direction. In this embodiment, the first end 11 has a rectangular shape. However, the shape of the first end 11 is not limited.

[0030] The second end 12 is the other end of the wired circuit board 1 in the first direction. The second end 12 is disposed apart from the first end 11 in the first direction. In this embodiment, the second end 12 has a rectangular shape. However, the shape of the second end 12 is not limited.

[0031] The flexible portions 13A, 13B, 13C, and 13D are disposed between the first end 11 and the second end 12 in the first direction. Each of the flexible portions 13A, 13B, 13C, and 13D extends in the first direction. The flexible portions 13A, 13B, 13C, and 13D are spaced apart from one another and aligned in the second direction. In this embodiment, the second direction is perpendicular to the first direction. Each of the flexible portions 13A, 13B, 13C, and 13D is thinner in the second direction than the first end 11 and the second end 12. Each of the flexible portions 13A, 13B, 13C, and 13D is more flexible than the first end 11 and the second end 12.

[0032] As shown in FIG. 2A, the wired circuit board 1 includes a metal support layer 2, a first insulating layer 3, a conductor pattern 4, and a second insulating layer 5.

[0033] (1) Metal support layer The metal support layer 2 extends in a first direction. The metal support layer 2 supports the first insulating layer 3, the conductive pattern 4, and the second insulating layer 5. The metal support layer 2 is made of a metal. Examples of metals include stainless steel alloys and copper alloys.

[0034] The thickness of the metal support layer 2 is, for example, 15 μm or more, preferably 20 μm or more. When the thickness of the metal support layer 2 is equal to or more than the above lower limit, the elasticity of the wired circuit board 1 can be ensured. The thickness of the metal support layer 2 is, for example, 500 μm or less, preferably 250 μm or less. When the thickness of the metal support layer 2 is equal to or less than the above upper limit, the flexibility of the wired circuit board 1 can be ensured.

[0035] (2) First insulating layer The first insulating layer 3 is disposed on the metal support layer 2 in the thickness direction of the wired circuit board 1. The thickness direction is perpendicular to the first direction and the second direction. The first insulating layer 3 is disposed between the metal support layer 2 and the conductive pattern 4 in the thickness direction. The first insulating layer 3 insulates the metal support layer 2 from the conductive pattern 4. The first insulating layer 3 is made of a flexible resin. An example of the resin is polyimide.

[0036] The thickness of first insulating layer 3 is not limited as long as it can insulate metal support layer 2 from conductive pattern 4. The thickness of first insulating layer 3 is, for example, 1 μm or more, preferably 3 μm or more, and for example, 50 μm or less, preferably 35 μm or less.

[0037] (3) Conductor pattern The conductive pattern 4 is disposed on the first insulating layer 3 in the thickness direction. The conductive pattern 4 is disposed on the opposite side of the first insulating layer 3 from the metal support layer 2 in the thickness direction. The conductive pattern 4 is made of a metal. An example of the metal is copper.

[0038] (3-1) Conductor pattern shape 1, the conductor pattern 4 has a plurality of first terminals 41A, 41B, 41C, and 41D, a plurality of second terminals 42A, 42B, 42C, and 42D, and a plurality of wirings 43A, 43B, 43C, and 43D. Note that the number of first terminals, the number of second terminals, and the number of wirings are not limited. The first terminal 41A is an example of a terminal.

[0039] The first terminals 41A, 41B, 41C, and 41D are arranged at the first end 11. In this embodiment, the first terminals 41A, 41B, 41C, and 41D are spaced apart from one another and lined up in the second direction. Each of the first terminals 41A, 41B, 41C, and 41D has a square land shape.

[0040] The second terminals 42A, 42B, 42C, and 42D are arranged at the second end 12. In the present embodiment, the second terminals 42A, 42B, 42C, and 42D are spaced apart from one another and lined up in the second direction. Each of the second terminals 42A, 42B, 42C, and 42D has a square land shape.

[0041] The wiring 43A electrically connects the first terminal 41A and the second terminal 42A. One end of the wiring 43A is connected to the first terminal 41A. The other end of the wiring 43A is connected to the second terminal 42A. In this embodiment, the wiring 43A has a first portion 431, a second portion 432, a third portion 433, a fourth portion 434, and a fifth portion 435.

[0042] The first portion 431 is disposed at the first end 11. The first portion 431 is disposed midway along the wiring 43A. The first portion 431 is disposed away from the first terminal 41A in the first direction.

[0043] The distance D1 (see FIG. 2) between the first portion 431 and the first terminal 41A is, for example, 0.03 mm or more, preferably 0.1 mm or more, more preferably 0.2 mm or more, and for example, 10 mm or less, preferably 5 mm or less.

[0044] The first portion 431 extends in the first direction and the second direction. The first portion 431 has a flat plate shape. In the present embodiment, the first portion 431 has a rectangular shape. The first portion 431 is larger than the first terminal 41A. The width (length in the second direction) of the first portion 431 is wider than the widths of the second portion 432 and the fifth portion 435. This increases the cross-sectional area of ​​the first portion 431 of the wiring 43A, thereby reducing the electrical resistance of the wiring 43A. Furthermore, since the first portion 431 is disposed at the first end portion 11, the first end portion 11 can be reinforced. In other words, a portion of the wired circuit board 1 near the first terminal 41A can be reinforced. This further improves the mountability of the wired circuit board 1.

[0045] The second portion 432 is disposed between the first terminal 41A and the first portion 431 in the first direction. The second portion 432 electrically connects the first terminal 41A and the first portion 431. One end of the second portion 432 is connected to the first terminal 41A. The other end of the second portion 432 is connected to the first portion 431.

[0046] The third portion 433 is disposed at the second end 12. The third portion 433 is disposed apart from the first portion 431 in the first direction. The third portion 433 is disposed midway along the wiring 43A. The third portion 433 is disposed apart from the second terminal 42A in the first direction. In the present embodiment, the distance between the third portion 433 and the second terminal 42A is the same as the distance D1 between the first portion 431 and the first terminal 41A. Note that the distance between the third portion 433 and the second terminal 42A may be different from the distance D1 between the first portion 431 and the first terminal 41A. Also, in the present embodiment, the third portion 433 has the same shape as the first portion 431. Note that the third portion 433 may have a different shape from the first portion 431. The third portion 433 is larger than the second terminal 42A. The width of the third portion 433 is wider than the widths of the fourth portion 434 and the fifth portion 435. This increases the cross-sectional area of ​​the third portion 433 of the wiring 43A, thereby reducing the electrical resistance of the wiring 43A. Furthermore, since the third portion 433 is disposed at the second end 12, the second end 12 can be reinforced. In other words, a portion of the wired circuit board 1 near the second terminal 42A can be reinforced. This further improves the mountability of the wired circuit board 1.

[0047] The fourth portion 434 is disposed between the second terminal 42A and the third portion 433 in the first direction. The fourth portion 434 electrically connects the second terminal 42A and the third portion 433. One end of the fourth portion 434 is connected to the second terminal 42A. The other end of the fourth portion 434 is connected to the third portion 433.

[0048] The fifth portion 435 is disposed on the flexible portion 13A. The fifth portion 435 extends along the flexible portion 13A. The fifth portion 435 electrically connects the first portion 431 and the third portion 433. One end of the fifth portion 435 is connected to the first portion 431. The other end of the fifth portion 435 is connected to the third portion 433.

[0049] The description of the wirings 43B, 43C, and 43D is the same as the description of the wiring 43A, and therefore the description of the wirings 43B, 43C, and 43D will be omitted.

[0050] (3-2) Layer structure of conductor pattern As shown in FIG. 2A, the conductive pattern 4 has a first conductive layer 4A and a second conductive layer 4B.

[0051] The first conductor layer 4A is provided on the first terminal 41A, the second terminal 42A (see FIG. 1), and the entire wiring 43A. The first conductor layer 4A is disposed on the first insulating layer 3 in the thickness direction. The second portion 432 of the wiring 43A, the fourth portion 434 of the wiring 43A (see FIG. 1), and the fifth portion 435 of the wiring 43A do not have the second conductor layer 4B and are made of the first conductor layer 4A.

[0052] This prevents the second portion 432 of the wiring 43A from coming into contact with the electronic component when mounting an electronic component on the first terminal 41A, ensuring reliable contact between the electronic component and the second conductor layer 4B of the first terminal 41A. As a result, the first terminal 41A can be reliably connected to the electronic component. Furthermore, when mounting an electronic component on the second terminal 42A, this prevents the fourth portion 434 of the wiring 43A from coming into contact with the electronic component, ensuring reliable contact between the second conductor layer 4B of the second terminal 42A and the electronic component. As a result, the second terminal 42A can be reliably connected to the electronic component. In other words, the mountability of the wired circuit board 1 can be ensured.

[0053] The first conductor layer 4A has a thickness of, for example, 1 μm or more, or preferably 3 μm or more, and for example, 50 μm or less, or preferably 30 μm or less.

[0054] That is, the thickness of the second portion 432 of the wiring 43A, the fourth portion 434 of the wiring 43A, and the fifth portion 435 of the wiring 43A is, for example, 1 μm or more, preferably 3 μm or more, and for example, 50 μm or less, preferably 30 μm or less.

[0055] The second conductor layer 4B is provided on the first terminal 41A, the second terminal 42A (see FIG. 1), the first portion 431 of the wiring 43A, and the third portion 433 of the wiring 43A (see FIG. 1). That is, the first terminal 41A, the second terminal 42A, the first portion 431 of the wiring 43A, and the third portion 433 of the wiring 43A include portions made up of the first conductor layer 4A and the second conductor layer 4B. This makes it possible to reinforce a desired portion of the wired circuit board 1 by utilizing a portion of the wiring 43A (first portion 431).

[0056] The second conductor layer 4B has a thickness of, for example, 1 μm or more, or preferably 3 μm or more, and for example, 50 μm or less, or preferably 30 μm or less.

[0057] First terminal 41A, second terminal 42A, first portion 431 of wiring 43A, and third portion 433 of wiring 43A are thicker than second portion 432 of wiring 43A, fourth portion 434 of wiring 43A, and fifth portion 435 of wiring 43A. The thicknesses of first terminal 41A, second terminal 42A, first portion 431 of wiring 43A, and third portion 433 of wiring 43A are, for example, 1 μm or more, preferably 3 μm or more, and for example, 50 μm or less, preferably 30 μm or less.

[0058] 1, in this embodiment, the second conductor layer 4B is disposed inside the edge of the first conductor layer 4A in the first terminal 41A, the second terminal 42A, the first portion 431 of the wiring 43A, and the third portion 433 of the wiring 43A. As a result, as shown in FIG. 2B, the peripheral portion of the first portion 431 of the wiring 43A has a stepped shape. The third portion 433 of the wiring 43A, the first terminal 41A, and the second terminal 42A are also similar to the first portion 431 of the wiring 43A.

[0059] 2A and 2B, the second conductor layer 4B is disposed on the first conductor layer 4A in the thickness direction. In this embodiment, the entire second conductor layer 4B is in contact with the first conductor layer 4A. This increases the cross-sectional areas of the first portion 431 and the third portion 433 of the wiring 43A, thereby reducing the electrical resistance of the wiring 43A.

[0060] The explanations for the layered structure of the first terminal 41B (see Figure 1), the second terminal 42B (see Figure 1) and the wiring 43B (see Figure 1), the explanations for the layered structure of the first terminal 41C (see Figure 1), the second terminal 42C (see Figure 1) and the wiring 43C (see Figure 1), and the explanations for the layered structure of the first terminal 41D (see Figure 1), the second terminal 42D (see Figure 1) and the wiring 43D (see Figure 1) are the same as the explanations for the layered structure of the first terminal 41A, the second terminal 42A and the wiring 43A.

[0061] Therefore, explanations of the layered structure of the first terminal 41B, the second terminal 42B and the wiring 43B, the layered structure of the first terminal 41C, the second terminal 42C and the wiring 43C, and the layered structure of the first terminal 41D, the second terminal 42D and the wiring 43D will be omitted.

[0062] (4) Second insulating layer 1, the second insulating layer 5 covers the wiring 43A. The second insulating layer 5 also covers the wirings 43B, 43C, and 43D. The second insulating layer 5 is disposed on the first insulating layer 3.

[0063] 1 and 2A, the second insulating layer 5 does not cover the first terminal 41A or one end of the second portion 432 of the wiring 43A. The second insulating layer 5 is disposed at a distance from the first terminal 41A in the first direction. This prevents the second insulating layer 5 from coming into contact with an electronic component when the electronic component is mounted on the first terminal 41A. As a result, the mountability of the wired circuit board 1 can be further improved.

[0064] The distance D2 between the second insulating layer 5 and the first terminal 41A is in the range of, for example, 0.01 mm or more, or preferably 0.05 mm or more, and for example, 1 mm or less, or preferably 0.1 mm or less.

[0065] 1, the second insulating layer 5 is also disposed at a distance from the second terminal 42A in the first direction. The second insulating layer 5 does not cover the second terminal 42A or one end of the fourth portion 434 of the wiring 43A.

[0066] The second insulating layer 5 is also disposed at intervals in the first direction from the first terminals 41B, 41C, and 41D and the second terminals 42B, 42C, and 42D. The second insulating layer 5 does not cover the first terminals 41B, 41C, and 41D, one end of the second portion 432 of each of the wirings 43B, 43C, and 43D, the second terminals 42B, 42C, and 42D, and one end of the fourth portion 434 of each of the wirings 43B, 43C, and 43D.

[0067] 2A, the second insulating layer 5 disposed on the second portion 432 is thinner than the second conductor layer 4B of the first terminal 41A. This prevents the second insulating layer 5 from coming into contact with the electronic component when the electronic component is mounted on the first terminal 41A. As a result, the mountability of the wired circuit board 1 can be further improved.

[0068] The thickness of the second insulating layer 5 is, for example, 1 μm or more, preferably 3 μm or more, and for example, 60 μm or less, preferably 40 μm or less.

[0069] The ratio of the thickness of the second insulating layer 5 to the thickness of the second conductor layer 4B is, for example, less than 100%, preferably 90% or less, more preferably 75% or less, and for example, 10% or more.

[0070] 1 and 2B, second insulating layer 5 covers the entire periphery of first portion 431. Covering the entire periphery of first portion 431 with second insulating layer 5 increases the contact area between second insulating layer 5 and conductive pattern 4. As a result, peeling of second insulating layer 5 from conductive pattern 4 can be suppressed.

[0071] 2. Action and Effects (1) According to the wired circuit board 1, as shown in FIG. 2A, the first portion 431 of the wiring 43A, which is located away from the first terminal 41A, includes a portion consisting of the first conductor layer 4A and the second conductor layer 4B.

[0072] This allows a portion (first portion 431) of the wiring 43A to be reinforced by the second conductor layer 4B. In this embodiment, by reinforcing the first portion 431, a portion of the wired circuit board 1 in the vicinity of the first terminal 41A can be reinforced.

[0073] Furthermore, first terminal 41A includes a portion made up of first conductor layer 4A and second conductor layer 4B. Second portion 432 disposed between first terminal 41A and first portion 431 is made up of first conductor layer 4A.

[0074] Therefore, when mounting an electronic component on the first terminal 41A, the second portion 432 of the wiring 43A is prevented from coming into contact with the electronic component, thereby ensuring reliable contact between the second conductor layer 4B of the first terminal 41A and the electronic component.

[0075] As a result, the first terminals 41A can be reliably connected to the electronic components, which means that the mountability of the wired circuit board 1 can be ensured.

[0076] In summary, it is possible to use a part (first portion 431) of wiring 43A to reinforce a desired portion while ensuring mountability.

[0077] (2) According to the wired circuit board 1, as shown in FIG. 1, the width of the first portion 431 is greater than the width of the second portion 432.

[0078] Therefore, the cross-sectional area of ​​the first portion 431 of the wiring 43A can be increased, thereby reducing the electrical resistance of the wiring 43A.

[0079] (3) According to the wired circuit board 1, as shown in FIG. 2A, the second insulating layer 5 is disposed at a distance D2 from the first terminal 41A.

[0080] This makes it possible to prevent the second insulating layer 5 from coming into contact with an electronic component when the electronic component is mounted on the first terminal 41A.

[0081] As a result, the mountability of the wired circuit board 1 can be further improved.

[0082] (4) According to the wired circuit board 1, as shown in FIG. 2A, the second insulating layer 5 disposed on the second portion 432 is thinner than the second conductor layer 4B of the first terminal 41A.

[0083] This makes it possible to further prevent the second insulating layer from coming into contact with an electronic component when the electronic component is mounted on the first terminal 41A.

[0084] As a result, the mountability of the wired circuit board 1 can be further improved.

[0085] (5) According to the wired circuit board 1, as shown in FIG. 2A, the entire second conductor layer 4B is in contact with the first conductor layer 4A.

[0086] This increases the cross-sectional area of ​​the first portion 431 of the wiring 43A, thereby reducing the electrical resistance of the wiring 43A.

[0087] 3. Variations Modified examples of the printed circuit board will be described below with reference to Figures 3 to 11D. In the following modified examples, the same members as those in the above-described embodiment are given the same reference numerals, and the description thereof will be omitted.

[0088] 3, the second insulating layer 5 disposed on the second portion 432 may be thicker than the second conductor layer 4B of the first terminal 41A. In this case, from the viewpoint of mountability of the wired circuit board 1, the second insulating layer 5 is preferably disposed at a distance D2 from the first terminal 41A.

[0089] (2) As shown in Fig. 4, only a portion of the second conductor layer 4B may be in contact with the first conductor layer 4A. Specifically, the wired circuit board 1 further includes an intermediate insulating layer 100 disposed between the first conductor layer 4A and the second conductor layer 4B. The intermediate insulating layer 100 has a via 100A. A portion of the second conductor layer 4B is in contact with the first conductor layer 4A through the via 100A. The thickness of the intermediate insulating layer 100 is, for example, 1 μm or more, preferably 3 μm or more, and for example, 60 μm or less, preferably 40 μm or less.

[0090] (3) As shown in Fig. 5, the second insulating layer 5 may cover the entire second portion 432. In other words, there may be no gap D2 between the second insulating layer 5 and the first terminal 41A. In this case, from the viewpoint of mountability of the wired circuit board 1, the second insulating layer 5 disposed on the second portion 432 is preferably thinner than the second conductor layer 4B of the first terminal 41A.

[0091] 6, the first portion 431 of the wiring 43A may extend to the vicinity of the second terminal 42A. In this case, the wiring 43A does not have the third portion 433 and the fifth portion 435. (5) As shown in Fig. 7, the thickness of the second conductor layer 4B may be different from the thickness of the first conductor layer 4A. In this modification, the second conductor layer 4B is thicker than the first conductor layer 4A. (6) As shown in FIG. 8, the second conductor layer 4B may be thinner than the first conductor layer 4B. Furthermore, the second portion 432 of the wiring 43A may be made of the second conductor layer 4B. In this case, the first conductor layer 4A is provided on the first terminal 41A, the second terminal 42A (see FIG. 1), the first portion 431 of the wiring 43A, and the third portion 433 (see FIG. 1) of the wiring 43A. The second conductor layer 4B is provided on the first terminal 41A, the second terminal 42A (see FIG. 1), and the entire wiring 43A. The entire first conductor layer 4A may be in contact with the second conductor layer 4B. (7) As shown in Fig. 9, the second insulating layer 5 may cover the first portion 431 and the fifth portion 435 of the wiring 43A, but may not cover the first terminal 41A and the second portion 432 of the wiring 43A. In this case, the second insulating layer 5 covers the third portion 433 (see Fig. 1) of the wiring 43A, but does not cover the second terminal 42A (see Fig. 1) and the fourth portion 434 (see Fig. 1) of the wiring 43A. (8) As shown in FIG. 10, the first terminal 41A may include a portion consisting of the first conductor layer 4A, the second conductor layer 4B, and the intermediate insulating layer 100. In this case, the second portion 432 of the wiring 43A consists of at least one of the first conductor layer 4A and the second conductor layer 4B. In this modification, the second portion 432 of the wiring 43A consists of the first conductor layer 4A and the second conductor layer 4B. The second portion 432 of the wiring 43A may consist of either the first conductor layer 4A or the second conductor layer 4B. In this modification, the thickness of the second conductor layer 4B may also be different from the thickness of the first conductor layer 4A. The second conductor layer 4B may be thicker or thinner than the first conductor layer 4A. (9) As shown in FIGS. 11A to 11D, in the first terminal 41A or the second terminal 42A, the widths of the first conductor layer 4A, the second conductor layer 4B, and the intermediate insulating layer 100 are not limited. As shown in Fig. 11A, the edge of the intermediate insulating layer 100 may coincide with the edge of the first conductor layer 4A. As shown in Fig. 11B, the intermediate insulating layer 100 may be disposed inside the edge of the first conductor layer 4A. As shown in Fig. 11C, the first conductor layer 4A may be disposed inside the edge of the intermediate insulating layer 100. Furthermore, as shown in FIG. 11D, the first conductor layer 4A may be disposed inside the edge of the second conductor layer 4B.

[0092] (10) These modifications can also achieve the same effects as the above-described embodiment. The above invention is provided as an exemplary embodiment of the present invention, but it is merely an example and should not be interpreted as being limiting. Modifications of the present invention that are obvious to those skilled in the art are included in the scope of the following claims. [Industrial Applicability]

[0093] The wired circuit board of the present invention is used for connecting electronic components. [Explanation of symbols]

[0094] 1 Wiring circuit board 3 First insulating layer 4 Conductor pattern 4A First conductor layer 4B Second conductor layer 5 Second insulating layer 41A 1st terminal 43A wiring 431 Part 1 432 Part 2 D2 interval

Claims

1. A wired circuit board comprising a first terminal, a second terminal, and a flexible portion disposed between the first terminal and the second terminal; The printed circuit board is a first insulating layer; a conductor pattern disposed on the first insulating layer, the conductor pattern including the first terminal, the second terminal, and wiring electrically connecting the first terminal and the second terminal, the wiring having a first portion disposed between the first terminal and the flexible portion and a second portion disposed between the first terminal and the first portion; Equipped with The conductor pattern is a first conductor layer disposed on the first insulating layer; a second conductor layer disposed on the first conductor layer; and the first portion of the wiring and the first terminal include a portion formed by the first conductor layer and the second conductor layer, The printed circuit board, wherein the second portion of the wiring is made of the first conductor layer or the second conductor layer.

2. A wired circuit board comprising a first terminal, a second terminal, and a flexible portion disposed between the first terminal and the second terminal; The printed circuit board is a first insulating layer; a conductor pattern disposed on the first insulating layer, the conductor pattern having the first terminal, the second terminal, and wiring electrically connecting the first terminal and the second terminal, the wiring having a first portion disposed between the first terminal and the flexible portion and a second portion disposed between the first terminal and the first portion, the conductor pattern having a first conductor layer disposed on the first insulating layer and a second conductor layer disposed on the first conductor layer; an intermediate insulating layer disposed between the first conductor layer and the second conductor layer; Equipped with the first terminal includes a portion consisting of the first conductor layer, the second conductor layer, and the intermediate insulating layer, the first portion of the wiring includes a portion consisting of the first conductor layer and the second conductor layer, The printed circuit board, wherein the second portion of the wiring is made of either the first conductor layer or the second conductor layer.

3. 2. The printed circuit board according to claim 1, wherein the width of the first portion is greater than the width of the second portion.

4. a second insulating layer disposed on the first insulating layer and covering the wiring; The printed circuit board according to claim 1 , wherein the second insulating layer is disposed at a distance from the first terminal.

5. 5. The printed circuit board according to claim 4, wherein the second insulating layer disposed on the second portion is thinner than the second conductor layer of the first terminal.

6. a second insulating layer disposed on the first insulating layer and covering the wiring; 2. The printed circuit board according to claim 1, wherein the second insulating layer disposed on the second portion is thinner than the second conductor layer of the first terminal.

7. the second portion of the wiring is made of the first conductor layer, 2. The printed circuit board according to claim 1, wherein the second conductor layer is entirely in contact with the first conductor layer.

8. the second portion of the wiring is made of the second conductor layer, 2. The printed circuit board according to claim 1, wherein the first conductor layer is entirely in contact with the second conductor layer.

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