Study on the Spreading Characteristics of the Solder Sn-3.0Ag-0.5Cu on an Inverted V-shaped SubstrateXiaolin Yang, Bingsheng Xu, Shan Hou, Ren Liu and Xuezhi ZhaoE3S Web Conf., 145 (2020) 02069DOI: https://doi.org/10.1051/e3sconf/202014502069