Facile synthesis of Cu10Sn3 nanoparticles and their sintering behavior for power device packaging

• Main Authors: Longjun Guo, Wei Liu, Xiaoliang Ji, Chunqing Wang
• Format: Article
• Language: English
• Published: Elsevier 2021-06-01
• Series: Results in Materials
• Subjects: Cu10Sn3 alloy; Nanoparticle synthesis; Microstructure; Electronic packaging; Mechanical properties; Sintering
• Online Access: http://www.sciencedirect.com/science/article/pii/S2590048X21000200

AbstractLow temperature nanojoining and high temperature service in the microelectronic packaging technology has received much focused attention. Here, we suggest a facile thermal decomposition method for preparation of Cu10Sn3 nanoparticles (NPs) with high bulk melting point (640 ​°C) by using common organic salts, oleylamine (OLA), and oleic acid (OA). The uniform and dense sintered Cu/Cu10Sn3/Cu joints can obtain at 300 ​°C, 10 ​MPa, 20 ​min, which presents the average shear strength of 25.1 ​MPa. In addition, the interdiffusion of Sn and Cu atoms at interface between the sintered Cu10Sn3 layer and Cu makes the interface a metallurgical bonding. This sintered Cu/Cu10Sn3/Cu joints can provide a new interconnect material and technology for high-power device package.