lead member

Abstract

A lead component includes: a lead conductor having a first main surface and a second main surface on the opposite side of the first main surface; and a resin portion covering the first main surface, the second main surface, and both side surfaces between both end portions of the lead conductor exposed in a first direction of the lead conductor, wherein the lead conductor includes a metal base material and a colored layer formed on at least a part of a surface of the metal base material, and wherein a normal reflectance of the colored layer is 0.3 or less when a total reflectance of barium sulfate is defined as 1.0 in an entire wavelength band of 220 nm or more and 850 nm or less.

Description

Technical Field

[0001] This disclosure relates to lead wire components. Background Technology

[0002] Non-aqueous electrolyte batteries, such as lithium-ion batteries, have a structure in which the positive electrode, negative electrode, and electrolyte are housed within a package made of a laminated film, and the lead components (sheet leads) connected to the positive and negative electrodes are sealed and removed. The lead components are formed by welding a multilayer sealing film made of a resin film such as polypropylene (PP) from both surfaces to the area excluding the two ends in the longitudinal direction of the aluminum lead conductor for the positive electrode or the nickel or nickel-plated copper lead conductor for the negative electrode.

[0003] Patent document 1 discloses such a sheet-like lead continuum in which a colored strip is attached to an insulating film at the defect location.

[0004] [Existing Technical Documents]

[0005] [Patent Literature]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2010-218752 Summary of the Invention

[0007] According to this disclosure, the lead component includes: a lead conductor having a first main surface and a second main surface opposite to the first main surface; and a resin portion that exposes two ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and two side surfaces between the two ends of the lead conductor. The lead conductor includes a metal substrate and a coloring layer formed on at least a portion of the surface of the metal substrate. In the entire wavelength band from 220 nm to 850 nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the coloring layer is 0.3 or less. Attached Figure Description

[0008] Figure 1 A plan view of the lead assembly according to the first embodiment is shown;

[0009] Figure 2 A cross-sectional view (part 1) of the lead wire component according to the first embodiment is shown;

[0010] Figure 3 A cross-sectional view (part 2) of the lead wire component according to the first embodiment is shown;

[0011] Figure 4 This is a schematic diagram showing a black nickel plating;

[0012] Figure 5A plan view (part 1) showing a method for manufacturing a lead wire component according to a first embodiment;

[0013] Figure 6 A plan view (part 2) showing a method for manufacturing a lead wire component according to the first embodiment;

[0014] Figure 7 A plan view (part 3) showing a method for manufacturing a lead wire component according to the first embodiment;

[0015] Figure 8 A plan view (part 4) showing a method for manufacturing a lead wire component according to the first embodiment;

[0016] Figure 9 A plan view of the lead wire component according to the second embodiment is shown; and

[0017] Figure 10 A cross-sectional view of the lead wire component according to the second embodiment is shown. Detailed Implementation

[0018] [The problem this disclosure aims to solve]

[0019] According to the technology disclosed in Patent Document 1, although the intended purpose is achieved, it is difficult to visually detect defects on the lead conductor.

[0020] [The Effects of This Disclosure]

[0021] According to this disclosure, defects appearing on the lead conductor can be easily detected by visual inspection.

[0022] The implementation scheme will be described below.

[0023] [Description of the implementation scheme of this disclosure]

[0024] First, aspects of this disclosure are listed and described below. In the following description, the same reference numerals are used for the same or corresponding elements, and their identical descriptions are not repeated.

[0025] <1> According to one aspect of this disclosure, the lead component includes: a lead conductor having a first main surface and a second main surface opposite to the first main surface; and a resin portion that exposes two ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and two side surfaces between the two ends of the lead conductor, wherein the lead conductor includes a metal substrate and a coloring layer formed on at least a portion of the surface of the metal substrate, wherein the positive reflectance of the coloring layer is 0.3 or less in the entire wavelength band from 220 nm to 850 nm when the total reflectance of barium sulfate is defined as 1.0.

[0026] In a lead component according to one aspect of this disclosure, when the total reflectance of barium sulfate is defined as 1.0, a coloring layer with a positive reflectance of 0.3 or less is formed on the surface of the metal substrate of the lead conductor. Therefore, when a defect is formed on the coloring layer, the defect is easily detected by visual inspection.

[0027] <2> according to <1> The metal substrate can include aluminum, aluminum alloy, nickel, nickel alloy, copper, copper alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad copper, or nickel-clad copper alloy. In this case, it is easy to obtain a lead conductor with good conductivity.

[0028] <3> according to <2> The metal substrate can be made of aluminum or an aluminum alloy, and the coloring layer can include a black anodized oxide coating. In this case, a coloring layer that allows for easy detection of defects can be easily formed.

[0029] <4> according to <3> In the entire wavelength range from 220 nm to 850 nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black anodized oxide coating can be below 0.2. In this case, defects can be detected more easily.

[0030] <5> according to <2> The metal substrate may be made of nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, or nickel-plated copper alloy, and the coloring layer may include a black nickel plating, wherein the arithmetic mean curvature Spc of the peak vertices of the black nickel plating, as determined according to ISO 25178, is 5000 mm. -1 That's all. In this case, it's easy to form a colored layer that makes defects easy to detect.

[0031] <6> according to <5> In the entire wavelength range from 220nm to 850nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black nickel plating can be below 0.2. In this case, defects can be detected more easily.

[0032] <7> according to <2> The metal substrate can be made of nickel, nickel alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy, and the coloring layer can include a black chromium plating layer. In this case, a coloring layer that allows for easy detection of defects can be easily formed.

[0033] <8> according to <7> In the entire wavelength range from 220 nm to 850 nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black chromium plating can be below 0.2. In this case, defects can be detected more easily.

[0034] <9> according to <1> to <8> The coloring layer can be disposed at least between the metal substrate and the resin part. In this case, when used in non-aqueous electrolyte batteries, electrolyte leakage is easily suppressed.

[0035] <10> according to <1> to <9> The coloring layer can be applied to all of the first and second main surfaces. In this case, defects can be easily detected over a wider area.

[0036] <11> according to <1> to <10> The resin portion may contain polypropylene. In this case, the resin portion can be easily heat-fused to the lead conductor.

[0037] <12> According to another aspect of this disclosure, the lead component includes: a lead conductor having a first main surface and a second main surface opposite to the first main surface; and a resin portion comprising polypropylene, the resin portion exposing two ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and two side surfaces between the two ends of the lead conductor, wherein the lead conductor includes a metal substrate made of aluminum or an aluminum alloy, and a coloring layer formed on the surface of the metal substrate, the coloring layer including a black anodized oxide coating, wherein the positive reflectance of the black anodized oxide coating is 0.2 or less in the entire wavelength band from 220 nm to 850 nm when the total reflectance of barium sulfate is defined as 1.0, and wherein the coloring layer is disposed on all of the first main surface and the second main surface.

[0038] According to another aspect of the lead component of this disclosure, when a defect is formed on the first or second main surface of the lead conductor, the defect is easily visually detected. Furthermore, a coloring layer can be easily formed, and the resin portion can be easily thermally fused to the lead conductor. In the case of a non-aqueous electrolyte battery, electrolyte leakage is easily suppressed.

[0039] <13> According to another aspect of this disclosure, the lead component includes: a lead conductor having a first main surface and a second main surface opposite to the first main surface; and a resin portion comprising polypropylene, the resin portion exposing two ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and two side surfaces between the two ends of the lead conductor, wherein the lead component includes a metal substrate made of nickel-plated aluminum, a nickel-plated aluminum alloy, a nickel-plated copper, or a nickel-plated copper alloy, and a coloring layer formed on the surface of the metal substrate, wherein the coloring layer includes a black nickel plating layer, and the arithmetic mean curvature Spc of the peak vertices of the black nickel plating layer, as determined according to ISO 25178, is 5000 mm. -1In the above, in the entire wavelength range of 220nm to 850nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black nickel plating is less than 0.2, and the coloring layer is disposed on all the first and second main surfaces.

[0040] According to another aspect of the lead component of this disclosure, when a defect is formed on the first or second main surface of the lead conductor, the defect is easily detected by visual inspection. Furthermore, a coloring layer can be easily formed, and the resin portion can be easily thermally fused to the lead conductor. In the case of a non-aqueous electrolyte battery, electrolyte leakage is easily suppressed.

[0041] [Details of the implementation scheme disclosed herein]

[0042] The embodiments of this disclosure will be described in detail, but the embodiments are not limited to the details described. It should be noted that in the specification and drawings of this application, the same reference numerals are used for elements having substantially the same function, so that repetitive descriptions can be omitted. For each figure, an XYZ orthogonal coordinate system is set for ease of description.

[0043] (First Implementation Plan)

[0044] A first embodiment will be described. The first embodiment relates to a lead component. The lead component (for example) can be used as a sheet lead for a non-aqueous electrolyte battery such as a lithium-ion battery.

[0045] [Structure of lead wire assembly]

[0046] First, the structure of the lead wire component will be described. Figure 1 A plan view of the lead wire component according to the first embodiment is shown. Figure 2 and Figure 3 A cross-sectional view of the lead wire component according to the first embodiment is shown. Figure 2 Corresponding to along Figure 1 The cross-sectional view taken from line II-II in the diagram. Figure 3 Corresponding to along Figure 1 The cross-sectional view taken from line III-III in the diagram.

[0047] like Figures 1 to 3 As shown, the lead component 1 according to the first embodiment includes a lead conductor 10 and a resin portion 30. The lead conductor 10 has a first main surface 11, a second main surface 12 opposite to the first main surface 11, and two side surfaces 13 connecting the first main surface 11 and the second main surface 12. The lead conductor 10 includes a metal substrate 20 and a coloring layer 21.

[0048] For example, the lead conductor 10 has a rectangular planar shape. In this embodiment, in the planar shape of the lead conductor 10, the extension direction of one set of parallel sides is defined as the X direction, the extension direction of another set of parallel sides is defined as the Y direction, and the normal direction of the first main surface 11 is defined as the Z direction. The dimension in the X direction can be greater than or less than the dimension in the Y direction, and can be equal to the dimension in the Y direction. For example, the two side surfaces 13 are perpendicular to the Y direction. The X direction is an example of a first direction.

[0049] The lead conductor 10 is in the shape of a strip, and its dimensions are appropriately set as needed. For example, the thickness of the lead conductor 10 is 0.05 mm to 1.0 mm, the length in the X direction is 1 mm to 100 mm, and the length in the Y direction is 10 mm to 100 mm.

[0050] For example, the metal substrate 20 is made of aluminum (Al), aluminum alloy, nickel (Ni), nickel alloy, copper (Cu), copper alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy. By using these metal materials, it is easy to obtain the lead conductor 10 with good conductivity.

[0051] For example, the coloring layer 21 covers all surfaces of the metal substrate 20 on the first main surface 11 side, all surfaces of the metal substrate 20 on the second main surface 12 side, all surfaces of the metal substrate 20 on one side 13 side, and all surfaces of the metal substrate 20 on the other side 13 side. In the entire wavelength range of 220 nm to 850 nm, when the total reflectance of barium sulfate (BaSO4) is defined as 1.0, the positive reflectance of the coloring layer 21 is 0.3 or less, preferably 0.2 or less, and more preferably 0.1 or less. When the positive reflectance of the coloring layer 21 is greater than 0.3, it is difficult to visually detect defects in the event that penetrate the coloring layer 21 and reach the lead conductor 10.

[0052] The positive reflectance was measured as follows. The sample was placed in an integrating sphere with a spherical inner surface and an inner wall made of barium sulfate (BaSO4), and irradiated with light in the wavelength range of 220 nm to 850 nm. Then, the diffuse reflectance including positive reflection (total reflectance) and the diffuse reflectance excluding positive reflection (diffuse reflectance itself) were obtained, and the positive reflectance was obtained by subtracting the diffuse reflectance from the total reflectance. The reflectance in the wavelength range of 220 nm to 850 nm was obtained as the reflectance spectrum.

[0053] When the metal substrate 20 is made of aluminum or an aluminum alloy, the coloring layer 21 may include, for example, an anodized coating of aluminum or an aluminum alloy. The anodized coating is a porous coating formed by anodizing the aluminum or aluminum alloy (acid-resistant aluminum treatment). Anodizing of the aluminum or aluminum alloy can be performed using, for example, a sulfuric acid electrolyte. By impregnating the pores of the anodized coating with dye, the color and positive reflectance of the anodized coating can be adjusted. The anodized coating is preferably a black anodized coating. By using a black anodized coating for the coloring layer 21, a coloring layer 21 in which defects are easily detected can be easily formed. The positive reflectance of the black anodized coating is preferably 0.2 or less, and more preferably 0.1 or less, across the entire wavelength range of 220 nm to 850 nm. This is because defects are easily detected. The thickness of the black anodized coating is preferably 0.5 μm to 40.0 μm or less, more preferably 1.0 μm to 30.0 μm or less, and even more preferably 3.0 μm to 15.0 μm or less. It should be noted that the color of the anodic oxide coating is not limited to black. For example, by using different colors of the anodic oxide coating between the lead component 1 used for the positive electrode of a non-aqueous electrolyte battery and the lead component 1 used for the negative electrode, it is easier to distinguish them from each other.

[0054] When the metal substrate 20 is made of aluminum, aluminum alloy, nickel, nickel alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy, the coloring layer 21 may include, for example, a black chromium plating layer. By using a black chromium plating layer for the coloring layer 21, a coloring layer 21 in which defects are easily detected can be easily formed. The black chromium plating layer can be formed by electroplating using an electrolyte containing chromium trioxide (Cr3O). The positive reflectance of the black chromium plating layer is preferably 0.2 or less, and more preferably 0.1 or less, across the entire wavelength range of 220 nm to 850 nm. This is because defects are easily detected. The thickness of the black chromium plating layer is preferably 0.1 μm to 15.0 μm or less, more preferably 0.5 μm to 10.0 μm or less, and even more preferably 1.0 μm to 5.0 μm or less.

[0055] When the metal substrate 20 is made of copper or a copper alloy, the coloring layer 21 may include, for example, an anodic oxide coating of copper or a copper alloy. By using an anodic oxide coating of copper or a copper alloy for the coloring layer 21, a coloring layer 21 in which defects are easily detected can be readily formed. The anodic oxide coating is formed by anodizing the copper or copper alloy. For example, a 1M aqueous solution of potassium hydroxide (KOH) at 3A / dm³ can be used. 2The current density is used for anodizing copper or copper alloys. The treatment time is, for example, 30 seconds. After anodizing, immersion in an aqueous solution of benzotriazole (BTA) can prevent discoloration. The positive reflectance of the anodized coating of copper or copper alloy is preferably 0.2 or less, and more preferably 0.1 or less, across the entire wavelength range of 220 nm to 850 nm. This is because defects are easily detected. The thickness of the anodized coating of copper or copper alloy is preferably 0.05 μm to 5.0 μm or less, more preferably 0.1 μm to 3.0 μm or less, and even more preferably 0.2 μm to 1.0 μm or less.

[0056] When the metal substrate 20 is made of copper or a copper alloy, the coloring layer 21 may include a palladium (Pd) chemical plating layer. When the copper or copper alloy substrate is immersed in a plating bath containing palladium ions, copper ions dissolve from the surface of the substrate due to the difference in ionization tendency, and metallic palladium precipitates on the surface of the substrate to form a chemical plating layer. The palladium chemical plating layer formed in this way is black. The positive reflectance of the palladium chemical plating layer is preferably 0.2 or less, and more preferably 0.1 or less, across the entire wavelength range of 220 nm to 850 nm. This is because defects are easily detected. The thickness of the palladium chemical plating layer is preferably 0.01 μm to 1.0 μm or less, more preferably 0.03 μm to 0.5 μm or less, and even more preferably 0.05 μm to 0.3 μm or less.

[0057] When the metal substrate 20 is made of copper or a copper alloy, the coloring layer 21 may include a film of copper or copper alloy sulfides or chlorides.

[0058] When the metal substrate 20 is made of nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, or nickel-plated copper alloy, the coloring layer 21 may include, for example, an arithmetic mean curvature Spc of the peak vertices of 5000 mm. -1 The above refers to the black nickel plating. The arithmetic mean curvature Spc of the peaks represents the average of the principal curvatures of the peaks present on the surface of an object, and the sharper the peak, the larger the value of the arithmetic mean curvature Spc. The arithmetic mean curvature Spc of the peaks can be determined by observation at 2,000x magnification using a KEYENCE CORPORATION VK-X110 laser microscope with a 100x objective lens, based on the measurement method of ISO 25178. Hereinafter, unless otherwise specified, "arithmetic mean curvature Spc" refers to the arithmetic mean curvature Spc of the peaks as measured according to ISO 25178 when observed using a KEYENCE CORPORATION VK-X110 laser microscope with a 100x objective lens at 2,000x magnification.

[0059] Figure 4 This is a schematic diagram illustrating a black nickel plating. Figure 4 In the example shown, the metal substrate 20 includes a copper foil 26 and a nickel plating layer 27 formed on the surface of the copper foil 26. For example, the thickness of the copper foil 26 is 0.2 mm, the thickness t1 of the nickel plating layer 27 is 0.1 μm to 1.0 μm, and the thickness t2 of the black nickel plating layer 28 used as the coloring layer 21 is 0.1 μm to 3.0 μm. The copper foil 26 and the nickel plating layer 27 have high flatness, and the arithmetic mean curvature Spc of the copper foil 26 and the nickel plating layer 27 is 4000 mm. -1 Below. Conversely, the arithmetic mean curvature Spc of the black nickel plating 28 is 5000 mm. -1 The above-mentioned peaks have high curvature and low flatness. It should be noted that the thickness t of copper foil 26, the thickness t1 of nickel plating 27, and the thickness t2 of black nickel plating 28 are all average thicknesses.

[0060] By setting the arithmetic mean curvature Spc to 5000 mm -1 The black nickel plating layer described above is used for coloring layer 21, which can easily form a coloring layer 21 where defects are easily detected. The arithmetic mean curvature Spc of the black nickel plating layer included in coloring layer 21 is more preferably 10,000 mm. -1 The above, and more preferably 15,000 mm -1 The above applies. Within the entire wavelength range of 220 nm to 850 nm, the positive reflectance of the black nickel plating is preferably 0.2 or less, and more preferably 0.1 or less. This is because defects are easily detected. The average thickness of the black nickel plating is preferably 0.1 μm to 3.0 μm, more preferably 0.3 μm to 2.0 μm, and even more preferably 0.5 μm to 1.5 μm.

[0061] For example, by electroplating with a plating bath containing nickel chloride hexahydrate, boric acid, ethylenediamine dihydrochloride (EDA·HCl) and a pH adjuster, an arithmetic mean curvature Spc of 5000 mm can be formed. -1 The above refers to a black nickel plating. For example, the contents of nickel chloride hexahydrate, boric acid, and EDA·HCl in each 1L of plating solution are 100g to 300g, 5g to 100g, and 50g to 400g, respectively, and the pH of the plating solution is 3.0 to 5.0.

[0062] While exposing the two ends of the lead conductor 10 in the X-axis direction, the resin portion 30 covers the first main surface 11, the second main surface 12, and the two side surfaces 13 between the two ends. The resin portion 30 is arranged to cover a portion of the outer peripheral side in the X-direction, except for the area including the two ends of the lead conductor 10. Therefore, the coloring layer 21 is at least provided between the metal substrate 20 and the resin portion 30. Because the two ends of the lead conductor 10 in the X-direction are electrically connected to conductive parts such as electrodes or terminals, the two ends are exposed, and the resin portion 30 is not provided therein. The resin portion 30 includes, for example, resin films 31 and 32 bonded together to allow the lead conductor 10 to be interposed therebetween. The dimensions of the resin films 31 and 32 in the Y-direction are larger than the dimensions of the lead conductor 10 in the Y-direction, thereby improving sealing. For example, the thickness of the resin films 31 and 32 is 30 μm to 300 μm, the length in the X-direction is 2 mm to 20 mm, and the length in the Y-direction is 3 mm to 150 mm. Resin film 31 is disposed on the first main surface 11, and resin film 32 is disposed on the second main surface 12.

[0063] Resin films 31 and 32 are, for example, resin articles made from a resin composition containing polypropylene (PP). The method of manufacturing the lead component 1 will be described below, but by including polypropylene in the resin portion 30, the resin portion 30 can be easily heat-fused to the lead conductor 10. It should be noted that the resin article is not necessarily in the form of a film. For example, it can be a seamless resin portion formed by coating or extruding a resin composition around the lead conductor 10. When using a film, a film can be wound around the lead conductor 10 to form the resin portion 30.

[0064] exist Figure 2 and Figure 3 Although resin films 31 and 32 are shown as single-layer structures, they can be replaced by a laminate comprising multiple resin films. For example, as resin films 31 and 32, a bilayer structure can be used, wherein a first layer made of a polyolefin resin such as maleic anhydride-modified low-density polyethylene (PE) or polypropylene (PP) is bonded together with a second layer made of a polyolefin resin such as low-density polyethylene.

[0065] In the lead component 1 according to the first embodiment, a coloring layer 21 is formed on the surface of the metal substrate 20 of the lead conductor 10. When the total reflectance of barium sulfate (BaSO4) is defined as 1.0, the positive reflectance of the coloring layer 21 is 0.5 or less. Therefore, when a defect is formed on the coloring layer 21, the defect is easily detected by visual inspection. Furthermore, when the lead component 1 is used by laser welding, the coloring layer 21, with its positive reflectance of 0.5 or less, readily absorbs the laser. Therefore, good weldability can also be obtained. In addition, the lead component 1 can be used in contact with an electrolyte, and the coloring layer 21 can improve the corrosion resistance of the lead conductor 10. In particular, when the electrolyte contains hydrofluoric acid, the improved corrosion resistance is suitable for extending the life of the lead conductor 10.

[0066] Furthermore, because the coloring layer 21 is disposed between the metal substrate 20 and the resin portion 30, in the case of a non-aqueous electrolyte battery, electrolyte does not easily penetrate into the space between the metal substrate 20 and the resin portion 30. Therefore, electrolyte leakage is easily suppressed.

[0067] Although it is not necessary to provide the coloring layer 21 on all of the first main surface 11 and the second main surface 12, if the coloring layer 21 is provided on all of the first main surface 11 and the second main surface 12, defects are easily found on a large area of ​​the lead conductor 10.

[0068] [Manufacturing method for lead wire components]

[0069] Next, the manufacturing method of lead wire component 1 will be described. Figures 5 to 8 A plan view showing a method for manufacturing the lead wire component 1 according to the first embodiment is provided.

[0070] First, such as Figure 5 As shown, a metal strip 120 is prepared. The metal strip 120 then becomes a metal substrate 20. The metal strip 120 is made of, for example, aluminum (Al), aluminum alloy, nickel (Ni), nickel alloy, copper (Cu), copper alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy.

[0071] Then, as Figure 6As shown, a coloring layer 121 is formed on the surface of the metal strip 120. The coloring layer 121 later becomes the coloring layer 21. When the metal strip 120 is made of aluminum or an aluminum alloy, for example, a colored anodic oxide coating (acid-resistant aluminum coating) can be formed by anodizing to create a porous anodic oxide coating, and by impregnating the dye into the pores of the anodic oxide coating, thus forming the coloring layer 121. When the metal strip 120 is made of aluminum, aluminum alloy, nickel, nickel alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy, a black chromium plating layer can be formed as the coloring layer 121 by electroplating, for example, using an electrolyte containing chromium trioxide (Cr3O). When the metal strip 120 is made of copper or a copper alloy, an anodic oxide coating can be formed as the coloring layer 121 by anodizing, for example. When the metal strip 120 is made of nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, or nickel-plated copper alloy, a black nickel plating layer can be formed as a coloring layer 121 by electroplating with a plating solution containing nickel chloride hexahydrate, boric acid, ethylenediamine dihydrochloride (EDA·HCl) and a pH adjuster.

[0072] Next, as Figure 7 As shown, multiple sets of resin films 31 and 32 are prepared and bonded together, such that a metal strip 120 with a coloring layer 121 formed thereon is sandwiched between the resin films 31 and 32. Then, the metal strip 120 with the coloring layer 121 and the resin films 31 and 32 are sandwiched between the upper and lower pressure heads of a hot press, and the resin films 31 and 32 are thermally fused to the metal strip 120 with the coloring layer 121 by hot pressing. This process is performed on the metal strip 120 at regular intervals. In this way, continuous lead components are obtained.

[0073] Then, as Figure 8 As shown, continuous lead components are cut between adjacent groups of resin films 31 and 32. In this way, multiple lead components 1 can be obtained.

[0074] (Second Implementation Plan)

[0075] The second implementation scheme will be described. The main difference between the second implementation scheme and the first implementation scheme lies in the formation range of the coloring layer. Figure 9 A plan view of the lead wire component according to the second embodiment is shown. Figure 10 A cross-sectional view of the lead wire component according to the second embodiment is shown. Figure 10 Corresponding to along Figure 9 The cross-sectional view taken from the XX line.

[0076] like Figure 9 and Figure 10As shown, in the lead member 2 according to the second embodiment, in the X direction, on one end side (+X side) relative to the resin portion 30, the coloring layer 21 covers the entire surface of the metal substrate 20 on the first main surface 11 side, the entire surface of the metal substrate 20 on the second main surface 12 side, the entire surface of the metal substrate 20 on one side side 13 side, and the entire surface of the metal substrate 20 on the other side side 13 side. The coloring layer 21 is also provided between the resin portion 30 and the metal substrate 20. In the X direction, on the other end side (-X side) relative to the resin portion 30, the coloring layer 21 covers a portion of the surface of the metal substrate 20 on the first main surface 11 side, a portion of the surface of the metal substrate 20 on the second main surface 12 side, a portion of the surface of the metal substrate 20 on one side side 13 side, and a portion of the surface of the metal substrate 20 on the other side side 13 side. Therefore, on the other end side (-X side) relative to the resin portion 30, a portion of the metal substrate 20 is exposed from the coloring layer 21.

[0077] The other configurations are the same as those in the first implementation scheme.

[0078] The coloring layer 21 is primarily provided to facilitate visual inspection of defects. After the inspection for the presence / absence of defects is completed, a portion of the coloring layer 21 can be removed, exposing a portion of the metal substrate 20, as shown in the second embodiment. For example, the portion of the lead conductor 10 relative to the resin portion 30 at one end (+X side) is encapsulated in a package, and the portion at the other end (-X side) is connected to a load or the like outside the package. Multiple portions at the other end (-X side) can be soldered.

[0079] While the embodiments have been described in detail above, they are not limited to any particular embodiment. Various modifications and changes may be made within the scope set forth in the claims.

[0080] Description of reference numerals in the attached figures

[0081] 1, 2: Lead wire components

[0082] 10: Lead conductor

[0083] 11: First primary surface

[0084] 12: Second primary surface

[0085] 13: Side view

[0086] 20: Metal substrate

[0087] 21: Shading layer

[0088] 26: Copper foil

[0089] 27: Nickel plating

[0090] 28: Black nickel plating

[0091] 30: Resin section

[0092] 31: Resin film

[0093] 32: Resin film

[0094] 120: Metal strip

[0095] 121: Shading layer

Claims

1. A lead wire component, comprising: A lead conductor having a first main surface and a second main surface on the opposite side of the first main surface; as well as The resin portion exposes both ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and the two side surfaces between the two ends of the lead conductor. The lead conductor includes Metal substrate, and A coloring layer formed on at least a portion of the surface of the metal substrate. In the entire wavelength range from 220nm to 850nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the coloring layer is below 0.

3.

2. The lead wire component according to claim 1, wherein the metal substrate comprises aluminum, aluminum alloy, nickel, nickel alloy, copper, copper alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy.

3. The lead wire component according to claim 2, The metal substrate is made of aluminum or an aluminum alloy, and The coloring layer includes a black anodized oxide coating.

4. The lead component according to claim 3, wherein in the entire wavelength band from 220 nm to 850 nm, when the total reflectance of the barium sulfate is defined as 1.0, the positive reflectance of the black anodized oxide coating is 0.2 or less.

5. The lead wire component according to claim 2, The metal substrate is made of nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, or nickel-plated copper alloy, and The coloring layer includes a black nickel plating layer, wherein the arithmetic mean curvature Spc of the peak vertices of the black nickel plating layer, as determined according to ISO 25178, is 5000 mm. -1 above.

6. The lead component according to claim 5, wherein in the entire wavelength band from 220 nm to 850 nm, when the total reflectance of the barium sulfate is defined as 1.0, the positive reflectance of the black nickel plating is 0.2 or less.

7. The lead wire component according to claim 2, The metal substrate is made of nickel, nickel alloy, nickel-plated aluminum, nickel-plated aluminum alloy, nickel-plated copper, nickel-plated copper alloy, nickel-clad aluminum, nickel-clad aluminum alloy, nickel-clad copper, or nickel-clad copper alloy. The coloring layer includes a black chromium plating layer.

8. The lead component according to claim 7, wherein, in the entire wavelength band from 220 nm to 850 nm, when the total reflectance of the barium sulfate is defined as 1.0, the positive reflectance of the black chromium plating is 0.2 or less.

9. The lead component according to any one of claims 1 to 8, wherein the coloring layer is disposed at least between the metal substrate and the resin portion.

10. The lead component according to any one of claims 1 to 9, wherein the coloring layer is disposed on all of the first main surface and the second main surface.

11. The lead component according to any one of claims 1 to 10, wherein the resin portion comprises polypropylene.

12. A lead component comprising: A lead conductor having a first main surface and a second main surface on the opposite side of the first main surface; as well as The resin portion comprises polypropylene, which exposes both ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and the two side surfaces between the two ends of the lead conductor. The lead conductor includes Metal substrates made of aluminum or aluminum alloys, and A coloring layer formed on the surface of the metal substrate, the coloring layer comprising a black anodized oxide coating, In the entire wavelength range from 220 nm to 850 nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black anodized oxide coating is below 0.2, and The coloring layer is disposed on all of the first main surface and the second main surface.

13. A lead component comprising: A lead conductor having a first main surface and a second main surface on the opposite side of the first main surface; as well as The resin portion comprises polypropylene, which exposes both ends of the lead conductor in a first direction while covering the first main surface, the second main surface, and the two side surfaces between the two ends of the lead conductor. The lead component includes Metal substrates made of nickel-plated aluminum, nickel-plated aluminum alloys, nickel-plated copper, or nickel-plated copper alloys, and A coloring layer formed on the surface of the metal substrate, the coloring layer comprising a black nickel plating layer, wherein the arithmetic mean curvature Spc of the peak vertices of the black nickel plating layer, as determined according to ISO 25178, is 5000 mm. -1 above, In the entire wavelength range from 220nm to 850nm, when the total reflectance of barium sulfate is defined as 1.0, the positive reflectance of the black nickel plating is below 0.2, and The coloring layer is disposed on all of the first main surface and the second main surface.

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