Solder tin paste is a new type of solder material that comes with SMT.
Solder paste is a complex system made of a paste of solder powder, flux, and other additives.
Solder tin paste has a certain viscosity and electronic components are first glued in place.
The soldered components and printed circuit pads are soldered to the soldering temperature (permanent connection) and the solvent and some additives evaporate.