Abrégé

A steam reflow apparatus includes a heating furnace including a preheating zone, a uniform heating zone, a melting zone and a cooling zone to which superheated steams are respectively supplied. The apparatus further includes a furnace-inlet-side dew condensation prevention zone and a furnace-outlet-side dew condensation prevention zone, to which air or nitrogen gas with 100° C. or higher heated by a heater is supplied, respectively adjacently provided with an upstream side of the preheating zone and a downstream side of the cooling zone. Atmospheric pressures of the furnace-inlet-side dew condensation prevention zone and the furnace-outlet-side dew condensation prevention zone are higher than atmospheric pressures of the preheating zone and the cooling zone.

Classes IPC  ?

• B23K 31/02 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux relatifs au brasage ou au soudage
• B23K 1/015 - Brasage par condensation de vapeur
• B23K 1/012 - Brasage par utilisation de gaz chaud
• B23K 1/00 - Brasage ou débrasage
• B23K 37/00 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe

Abrégé

The purpose of the present invention is to provide a water vapor reflow device and water vapor reflow method that use superheated water vapor and that make practical use possible. A water vapor reflow device (1) provided with a heating furnace (2) having a preheating zone (Z2), a soaking zone (Z3), a melting zone (Z4), and a cooling zone (Z5), to each of which heated water vapor is supplied, wherein a furnace exit-side condensation prevention zone (Z6) and a furnace entrance-side condensation prevention zone (Z1) to which air or nitrogen gas heated by a heater (H1) to 100°C or higher is fed are respectively provided adjacent to the downstream of the cooling zone (Z5)and to the upstream of the preheating zone (Z2) to which superheated water vapor is fed. When a substrate (S) enters the heating furnace (2), and when the substrate (S) exits the heating furnace (2), the water vapor that has come into contact with the substrate (S) can be prevented from falling to 100°C or lower, liquefying, and condensing, and therefore a practicable water vapor reflow can be realized.

Classes IPC  ?

• B23K 1/008 - Brasage dans un four
• B23K 1/012 - Brasage par utilisation de gaz chaud
• B23K 3/04 - Appareils de chauffage
• B23K 31/02 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux relatifs au brasage ou au soudage
• H05K 3/34 - Connexions soudées
• B23K 101/42 - Circuits imprimés