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    Heraeus Lead Free Solder Pastes
F640 Series
F 640 Solder Paste series is a state-of-the-art lead free no clean solder paste that promotes wetting and minimises soldering defects. The F 640 flux system is specifically optimised for Sn/Ag/Cu alloy soldering. Extensive testing at customer locations has proven this paste to be capable of defect-free performance in theproduction environment.The F 640 Series exhibits minimal slump and has excellent print-after-wait performance. This formula provides superior performance on a variety of surfaces finishes and leaves behind a clearresidue. Reflow can be accomplished in air or nitrogen.
Key Benefits
  • Exceptional print to print consistency.
  • Excellent wetting.
  • Min. 8 hour tack and work life.
  • Very good print after wait performance.
  • SIR 85/85 > 10E10 Ohm.
  • Constant performance at 30C for 7days.
  • Work conditions between 20 and 32C
  • Fulfils Siemens Standard accord. DIN EN 29454
Lead Free Solder Paste, Halogen Free Solder Paste, Printing Solder Paste, Solder Paste with Silver, SAC Alloy Solder Paste, Solder Paste in Jar, No Clean Solder Paste, Lead Solder Paste
Lead Free
Data Sheet Profile MSDS
. Solder Defects
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