| 초록 |
At present, black polymer spacers are used for separating aligned camera lens physically in a camera module in a mobile phone. However, mechanical properties of polymer spacers have their limits especially in a current trend that more lens are used in a thinner camera module. Thus, the copper(Cu) becomes a good candidate to those polymer spacers because of its superior mechanical properties and its inherent blackness owing to its surface black oxide(CuO). The latter property is very critical in quality control because the closer the color of the spacer is to black, the less the interference of light and the flare phenomenon occur. The Cu blackening process is composed of cleaning, deoxidization, activation, blackening and sealing. The effect of operational parameters such as the temperature of each unit process, the activator concentration, etc., was then investigated based on the blackness of blacked Cu strips measured by a colorimeter. |
