Research of surface wettability of plating on the ceramic shell

The wettability of coating surface has important significance in the spreading situation of piece of sticky piece, and the welding state of Au-Sn solder. Wettability of solids is expressed with wetting contact angle. In this paper, by studying the wetting angles of the water droplets on the surface of the different ceramic shell, assess the wettability on the surface of the ceramic shell, and the ways to improve the wettability is proposed through experiments. The results of the experiment show that the presence of organic matter reduces the wettability of the coating surface, so the wetting angles of the coating surface are large in the analysis process. After the plasma cleaning, organics were washed subsequently, and the wettability of the surface coating increased, so the wetting angles are decreased.