Patent AT-E400395-T1: [Translated] SOLDER PASTES

A solder paste comprising a powder of a Zn-containing Sn-based, lead-free solder mixed with an activator-containing rosin-based flux to which 0.5 - 10.0 wt% of isocyanuric acid or a haloalkyl ester thereof is added can prevent the formation of solder balls and voids during reflow soldering and exhibit good solderability. A solder paste comprising a powder of an Ag- or Zn-containing Sn-based, lead-free solder mixed with an activator-containing rosin-based flux to which 0.01 - 10.0 wt% of a salicylamide compound also does not exhibit a change in viscosity and exhibits good solderability.