ALPHA WS9160-M7 Solder FluxMacDermid Alpha Water soluble paste flux for wafer level ball attach on both Fan-in and Fan-out applications.Excellent activity allows for excellent soldering to Cu UBM, Cu OSP and ENIG soldering processExcellent wettability: Excellent activity reduces the occurrence of dark ballsExcellent cleanability: Flux residues are removed easily with warm DI water Send enquiry