Workers in a modern electronics factory were surveyed by questionnaire and lung function testing to see if there was evidence of widespread work-related respiratory symptoms. Of the responding workers exposed to solder flux fumes on the shop floor, 22% had work-related breathlessness or wheeze or both. Exposed workers had a lower FEV1 and FVC than unexposed workers. Work-related rhinitis was al...

For obtaining good joints by soldering, a wettability of liquid metal on the solid metal surface, relatlatte, relattlated o solderability, is one of the most important factors, and the wettability is accelerated by using a suitable flux and atmosphere. In atmosphere soldering the flow of molten solder will be retarded by oxide films on base metals formed by a small amount of oxygen in atmospher...

The use of no-clean fluxes in liquid and solid form has grown considerably primarily for two reasons: to reduce costs and to minimize the environmental impact of soldering operations. At the same time, considerable work is progressing on no-clean fluxes for solder pastes. In order to build confidence in the technology, it is essential to prove that no-clean fluxes can produce good soldering per...

The main aim of this work was to determine the soldering, thermal and mechanical properties of joints fabricated by use of Au-20Sn solder. Soldered joints were fabricated by application of a flux-free process with assistance of power ultrasound. By acting of power ultrasound, the Au-20Sn solder wets the surface of Cu, Ag and Ni substrates. The contact wetting angle on all substrates varied with...