Features

• Water-soluble
• Viscosity suitable for 150–300mm wafers
• No residue
• Halide-free
• Promotes uniform solder bump formation
• Suitable for SnPb and Pb-free solder applications

Introduction

Wafer Flux WS-3543 is a low viscosity semiconductor-grade flux, specifically optimized for uniform, oxide-free solder bump formation across wafers up to 300mm (12 inches) in diameter, without solder thieving. WS-3543 washes off easily and leaves zero residues, even after repeated application/ reflow/cleaning cycles.