TY - JOUR AB - The microstructure of the Sn‐3.5wt%Ag/Cu and Sn‐9.0wt%Zn/Cu interfaces after soldering at 250°C was evaluated. The cross‐sections were investigated using a scanning electron microscope and energy dispersive X‐ray to determine the interface layer structure and composition. Even though the cooling rate from soldering temperature to room temperature is rapid, this study indicates that the intermetallic compound is formed at the interface between the solder and the copper substrate for both the Sn‐3.5wt%Ag and the Sn‐9.0wt%Zn lead‐free solders. VL - 10 IS - 1 SN - 0954-0911 DO - 10.1108/09540919810203748 UR - https://doi.org/10.1108/09540919810203748 AU - Nakamura Yoshikazu AU - Sakakibara Yoshinori AU - Watanabe Yoshihisa AU - Amamoto Yoshiki PY - 1998 Y1 - 1998/01/01 TI - Microstructure of solder joints with electronic components in lead‐free solders T2 - Soldering & Surface Mount Technology PB - MCB UP Ltd SP - 10 EP - 12 Y2 - 2024/04/23 ER -