Fundamental experiences have been studied for development of pre-treatment process of Sn by-prod-ucts such as solders. Dry and wet separation/recovery processes were considered by the differences of physicalproperties. The by-products, which are analyzed by solder metal and oxides. The metal and oxide were simplyseparated by dry ball-milling process for 12 hours, after that recovery metal powder might be reusable as lead orlead-free solders. In terms of wet separation process, samples were dissolved in HNO3+H2O2 and the precipita-tion were analyzed by SnO2. Overall efficiency of recovery might be increasing via developing simple pre-treat-ment process.

• 진연호(고등기술연구원 신소재공정센터) | Y. H. Jin
• 장대환(고등기술연구원 신소재공정센터) | D. H. Jang
• 정항철(고등기술연구원 신소재공정센터) | H. C. Jung Corresponding Author
• 이기웅((주)성일하이텍) | K. W. Lee