구리의 전해도금 시 아라비아 검의 결정구조와 기계적 특성에 미치는 효과

The purpose of this study is to produce electrolytic copper foil with a uniform 10 μm thickness and appropriate mechanical properties. The experiment was carried out by adding gum arabic (0 – 10 ppm) alone. In addition, we conducted the experiment by adding gum arabic in combination with the basic additives to 20 ppm Cl, 10 ppm MPSA, and 30 ppm PVP. When gum arabic was added alone, higher surface roughness and electrical resistivity were observed. When the concentration of gum arabic exceeded 7 ppm, large grains with sizes greater than 10 μm were formed on the surface. Therefore, to achieve the desired surface roughness, it is reasonable to add 2–5 ppm of gum arabic to the electrolytes containing Cl, MPSA, and PVP. The samples that exhibited high elongation showed pronounced crystal growth along the (200) and (111) planes, as revealed by XRD analysis with relative texture coefficient (RTC) evaluation. The combined RTC values for the (200) and (111) orientations were 70.1%, 72.3%, 69.6%, 69.1%, and 68.6% at gum arabic concentrations of 0, 2, 5, 7, and 10 ppm, respectively. The highest value was observed at 2 ppm gum arabic addition. As a result, a tensile strength above 315 MPa was achieved, and the elongation also exceeded 9.1%. Furthermore, the combined addition of 2–5 ppm gum arabic was effective in producing a uniform deposited layer with an electrical resistivity of 1.86 μΩ·cm or lower.