Stability of Multilayered Ag/Ag3Sn/Sn Films Non-cyanide Electroplateded for high-reflective back-electrode
Due to the problems of environmental pollution and energy consumption,the design of high-reflective back-electrode(HRBE)was proposed and applied to flip-chip and vertical-packaged high-power LED packaging processes.The working reliability of the Ag-based reflective electrode material is a key technical bottleneck in the development of a HRBE that has a simple structure,a low manufacturing cost,and a high reliability in a complicated working environment.In this work,multilayered Ag/Ag3Sn/Sn films were prepared by non-cyanide electrodeposition and annealing and we studied their properties.Multilayered Ag/Ag3Sn/Sn exhibited superior high specular reflectance compared to pure Ag films.After immersing in 2 ml/L(NH4)2Sx solution for 60min,the multilayered Ag/Ag3Sn/Sn films still maintained the initial reflectivity,and the pure Ag film decreased significantly.In addition,the contact resistance of the pure Ag film increases significantly with the increase of the immersing time and eventually fails.These results show that Ag/Ag3Sn/Sn films have excellent reflectivity and sulfidation resistance,paving the way for the preparation of efficient HRBE.
electrodeposition reflectivity sulfidation resistance Ag/Ag3Sn/Sn layers
Shengnan Ji Chen Wang Yunpeng Wang Haitao Ma Ning Zhao
Department of Materials Science and Engineering Dalian University of Technology Dalian,China
国际会议
上海
英文
396-399
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）