Metal Research Center

Germany

Metal Research Center

Germany

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Kaneko H.,Metal Research Center | Hirose K.,Metal Research Center | Sato K.,Metal Research Center | Tanaka N.,The Innovation Company | And 3 more authors.
Furukawa Review | Year: 2010

Connectors for boards and modules are becoming narrower in pitch due to multipolarization and smaller because electronic devices are becoming compact and multifunctional. A copper alloy strip used for electric contact materials in these small-sized connectors requires high strength and good performance to bending. Furukawa Electric improved these two conflicting features under the control of the metal structures: we have developed a new Cu-Ni-Si alloy (Colson alloy) EFTEC-820 (C64775: Cu-2.3Ni-0.65Si-0.5Zn-0.15Sn-0.1Mg-0.15Cr). This paper reports the improved features of this alloy and our grainrefining technology that contributes to achieving these features.


Yoshida K.,Metal Research Center | Kitagawa S.,Metal Research Center | Mitose K.,Metal Research Center | Susai K.,Metal Research Center
Furukawa Review | Year: 2011

As a matter of consideration of plating materials for automobile terminals, we made a sample in which a Cu-Sn diffusion layer was exposed to the surface. We evaluated its anti-fretting characteristics, its corrosion resistance, its coefficient of friction, its solder wettability. As a result, when compared to the conventional plating materials with Sn on its surfaces, the material with the Cu-Sn diffusion layer (Cu-Sn alloy plating) showed much superior anti-fretting characteristics. Also, it met or exceeded its capabilities of coefficient of friction and corrosion resistance has sufficient performance for practical use. Its solder wettability was a little inferior to the conventional ones, though.

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