Patent ID: 7735708

Claim:
A reflow furnace in which a printed circuit board applied with solder cream and having electronic components put in position on the solder cream is heated to join the electronic components to the circuit board, comprising: a plurality of chambers separated by dividing the inner space of the furnace by partition walls located at intervals in the transport direction of the circuit board; and a heated atmosphere circulating mechanism to blow an atmosphere vertically onto the circuit board through a plurality of blowout holes extending substantially from a first partition wall to a second partition wall and to circulate the atmosphere in the chanber, while the circuit board passes through the chamber, wherein the force of the atmosphere blown vertically onto the circuit board in a region adjacent said first and second partition walls of each chamber is smaller than that of the atmosphere blown vertically onto the circuit board in a central region of the chamber, located along the direction of transporting the circuit board.