Patent ID: 6135344
Filing Date: 2000-10-24
Classification: B23K,F27B,F27D,H05K

Abstract:
A reflow soldering furnace for reflow soldering a to-be-heated object on which both electric parts having high heat capacities and electric parts having low heat capacities are mounted, said reflow soldering furnace comprising:a reflow soldering furnace body defined by furnace walls and including a preheating zone for heating the to-be-heated object to a first target temperature lower than a melting point of solder and a main heating zone for heating the to-be-heated object to a second target temperature at which solder melts;a hot-gas applier for blowing a hot gas of a temperature lower than the first target temperature to the to-be-heated object in the preheating zone, thereby cooling the electric parts having the low heat capacities; anda radiant-heat applier for applying radiant heat of a temperature higher than the first target temperature to the to-be-heated object at least in the preheating zone, thereby heating the electric parts having high heat capacities.