Metallic material for connector and process for producing the metallic material for connector
The technology of a metal material and a manufacturing method, which is applied in the field of metal materials for connectors and its manufacturing, can solve the problems of low insertion force and connection reliability, reduced solder wettability, and high friction coefficient, so as to reduce the friction coefficient and weldability. Excellent effect with excellent environmental resistance
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Embodiment 1
[0093]A 7 / 3 brass square wire with a width of 0.64 mm (manufactured by Furukawa Electric Co., Ltd., material: JIS standard C2600: the same below) was subjected to copper underplating with a thickness of 0.3 μm, and then tin-plated with a thickness of 0.3 μm. Afterwards, irradiate the YAG laser (output 30W, wavelength 1064nm) with a beam diameter of 0.2mm along the material length direction at the central part of each surface width direction of the material and reflow to obtain figure 1 Square wire rod shown in enlarged rough cross-section of . figure 1 Among them, 1 represents the base material (brass square wire) and copper plating layer, 2 represents the tin plating layer, and 3 represents the copper-tin alloy layer. It becomes a square wire rod in which the copper-tin alloy layer 3 is exposed on the surface of the portion irradiated with laser light.
[0094] figure 2 will be figure 1 It is an enlarged schematic cross-sectional view of a further enlarged and schematical...
Embodiment 2
[0096] A 0.64 mm wide Corson alloy (manufactured by Furukawa Electric Co., Ltd., trade name EFTEC-97: the same below) square wire was subjected to copper underplating with a thickness of 0.5 μm, and then tin-plated with a thickness of 0.6 μm. Afterwards, a YAG laser with a beam diameter of 0.2mm (output 30W, wavelength 1064nm) was irradiated along the length direction of the material at the central part of each surface width direction of the material and reflowed to obtain a square wire rod. It becomes a square wire rod in which the copper-tin alloy layer is exposed on the surface of the portion irradiated with laser light.
Embodiment 3
[0098] A 7 / 3 brass square wire with a width of 0.64 mm was subjected to nickel underplating with a thickness of 0.5 μm and copper underplating with a thickness of 0.3 μm, and then tin-plated with a thickness of 0.3 μm. Afterwards, irradiate the YAG laser (output 30W, wavelength 1064nm) with a beam diameter of 0.2mm along the material length direction at the central part of each surface width direction of the material and reflow to obtain image 3 Square wire rod shown in enlarged rough cross-section of . image 3 Among them, 1 represents the base material (brass square wire) and copper plating layer, 2 represents the tin plating layer, and 3 represents the copper-tin alloy layer. It becomes a square wire rod in which the copper-tin alloy layer is exposed on the surface of the portion irradiated with laser light.
[0099] Figure 4 will be image 3 It is an enlarged schematic cross-sectional view of a further enlarged and schematically represented surface portion of a square...
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Abstract
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