Cold-Rolled Copper Trace Performance in PCB’s and the Influence of Thermal Ageing

This study shows how thermal ageing influences the onset of plasticity in cold-rolled copper at different operating temperatures of 24°C, 60°C, 100°C and 150°C. In addition to these baseline tests, cold-rolled copper samples were also exposed to thermal storage at 250°C for 1 hour. It is demonstrated that these variables are highly critical for the flow stress and this paper discusses the correlation in detail. Additionally cross- sections of the cold-rolled copper samples have enabled correlations to be made between the microstructural morphology and the mechanical performance of cold-rolled copper.