统计分析了焊接缺陷主要是表现为锡球断路、焊锡过流、锡球分布不对称以及烧焦和锡溅，主要受锡球大小、焊盘相对位置以及有关加工参数的影响。
By statistical analysis, the defects are tin-ball short, overflowing, dissymmetry, splash and scorch, which are mainly affected by the tin-ball size, pad positions, and process parameters .
youdao