Method of soldering in a controlled-convection surface-mount reflow furnace
Номер патента: US5232145A. Автор: Michael F. Roffey, Richard C. Alley, Stephen E. Carmassi, William T. Daley. Владелец: Watkins Johnson Co. Дата публикации: 03-08-1993.A reflow furnace in which the rate at which the temperature of the parts being processed can change can be varied throughout the furnace in order to provide a high initial rise rate, a period of low or no rise, and a very fast rise to a temperature above the melting point of solder followed by a fast drop to a temperature below the melting point of the solder. The entire operation is performed in an atmosphere of air, inert gas, active gas, or combustible gas. In a stabilization zone and a reflow zone, the primary heating mode is forced, controlled convection that is perpendicular to surface of an assembly to be soldered.