Patent ID: 6269998
Filing Date: 2001-08-07
Classification: H01L,H05K,Y10T

Abstract:
An apparatus for manufacturing a substrate by heating the substrate with an electronic device mounted thereon and melting a solder material formed on the substrate or the electronic device to connect the substrate and the electronic device to each other, the apparatus comprising:a treating vessel adapted to receive therein the substrate having connecting surfaces thereof, placing thereon the electronic device through a liquid, which is supplied to cover the connection surfaces of the substrate;an evacuating unit for evacuating a gas from within the treating vessel;a gas introducing unit for introducing a gas into the treating vessel;an oxygen concentration monitor for measuring the oxygen concentration in the treating vessel;a heater arranged in the treating vessel for heating the substrate to melt the solder material;a cooling unit arranged in the treating vessel for cooling the substrate with the electronic device connected to the connecting surfaces, after the heating by the heater; andan atmosphere control unit for controlling the evacuating unit and the gas introducing unit, the atmosphere control unit acting to control the oxygen concentration to 10 ppm or less through repeated evacuation and introduction of a gas into the treating vessel, in which the substrate is contained, and to control the pressure of atmosphere in the treating vessel while the heater heats the substrate under the oxygen concentration, thereby evaporating the liquid.