Achieving very high cycle fatigue performance of Au thin films for flexible electronic applications

• 作者: Hong-Lei Chen Xue-Mei Luo Dong Wang Peter Schaaf Guang-Ping Zhang
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（30）
• 页码范围: 107-113
• 页数: 7页
• 语种: 英文

摘要

The fatigue damage behavior of the nanocrystalline Au films on polyimide substrates was investigated.It was found that the very high-cycle fatigue damage resistance of the Au film was significantly enhanced by at least a factor of ～2 in supported loading through adding an ultrathin Ti interlayer at the Au film/polyimide interface.Such a better fatigue damage resistance is mainly ascribed to the effective suppression of voiding at the Au film/polyimide interface through modulation of the Au/Ti interface,and thus the propensity of the cyclic strain localization and grain boundary cracking is reduced.The finding may provide a potential strategy for the design of flexible devices with ultra-long fatigue life.