Process for reflow soldering

The invention relates to a process for the reflow soldering of printed circuit board assemblies provided with solder paste in a sealed chamber with heating in the chamber. In a first process step, the pressure in the chamber is amplified in comparison with the atmospheric pressure and the temperatur...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DIEHM ROLF LUDWIG, WALTER MARKUS, LETTNER HORST
Format:	Patent
Sprache:	eng
Schlagworte:	CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRINTED CIRCUITS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The invention relates to a process for the reflow soldering of printed circuit board assemblies provided with solder paste in a sealed chamber with heating in the chamber. In a first process step, the pressure in the chamber is amplified in comparison with the atmospheric pressure and the temperature in the chamber is increased by convection heating to melt the solder paste and, in a second process step, the pressure is again lowered to atmospheric pressure in controlled manner while maintaining the temperature.