Sunday, June 11, 2023

Indium Corporation Introduces Liquid Flip-Chip Flux

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WS-3910 is a water-soluble, halogen-free flip-chip flux that is designed for low-temperature—150°C—bismuth-tin applications. WS-3910 is chemically designed to exhibit minimal evaporation after

application. Its composition also eliminates compatibility underfills by having a completely water-cleanable residue.


  • Features low evaporation after application, offering a more flexible process window than other similar fluxes; it does not dry out during reflow
  • Shows strong activity at low temperatures, with a current peak reflow temperature of 150°C, making it ideal for applications where oxide formation is unwanted
  • Compatible with spraying applications



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