Suppressing Kirkendall Void Nucleation in Electroplated Copper Printed Circuit Substrates
Maintaining low bath organic breakdown impurities and pre-solder thermal annealing suppresses Kirkendall void nucleation in electroplated copper substrates.
Evaluating Intermetallic Layer Thickening Rates in Aged SAC305 Solder Assemblies
Thermal aging accelerates SAC305 intermetallic growth through parabolic diffusion, where Cu3Sn layer thickening and Kirkendall voiding reduce joint shear strength.
Electroplated Copper Interfacial Micro Void Nucleation Control
Controlling copper interfacial micro-void nucleation requires balancing plating bath organic additives, limiting total organic carbon, and enforcing slow thermal anneal ramps.
Calculating Interfacial Vacancy Concentration Gradients along Electroplated Copper Barriers in High Density Chips
Calculating interfacial vacancy gradients along copper barriers requires solving coupled electromigration, stress, and thermal divergence equations to prevent premature voiding.