The effect of electrolyte layer thickness on electrochemical migration of tin

•The effect of electrolyte layer thickness on ECM of tin was investigated.•tsc first increases and then decreases with increasing the thickness.•The dendrite growth rate depends on the local concentration of tin ions.

In this work, electrochemical migration behaviour of tin under electrolyte layers with different thicknesses was investigated using thin electrolyte layer method. The results show that the time to short circuit first increases and then decreases with increasing thickness of the electrolyte layer, the maximum value is present at 100 μm. Inductively Coupled Plasma Source Mass Spectrometer was employed to measure the local concentration of tin ions. The result shows that the lowest local concentration of tin ions is present at the 100-μm-thick electrolyte layer, resulting in a maximum value in the time to short circuit.