| 초록 |
Blackened copper was considered for a candidate for the spacers in camera modules, because of its better mechanical properties compared to the currently used polymer materials for spacers. The key point now is that the closer the spacer is to black, the less light interference and flaring occurs. Thus, the blackness of the resulting blackened copper samples (including typical copper sheets and mechanically processed copper spacers shaped with flattened donuts with a hole at the center), measured by a colorimeter, was optimized with respect to the operating conditions. The copper blackening process is composed of cleaning, deoxidation, activation, blackening and sealing, and the influence of operating parameters such as the temperature, activator concentration, etc. was considered. The featured spiky CuO columnar structure was grown uniformly on the surface, as well even as in the inner wall of the hole of spacers. |
