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SMTnet Express, May 18, 2017, Subscribers: 30,472, Companies: 10,597, Users: 23,256

Technical Library

How to Use the Right Flux for the Selective Soldering Application

Bruno Tolla Ph.D, Denis Jean, Xiang Wei Ph.D; Kester

The selective soldering application requires a combination of performance attributes that traditional liquid fluxes designed for wave soldering applications cannot fulfill. First, the flux deposition on the board needs to be carefully controlled. Proper fine tuning of the flux physicochemical characteristics combined with a process optimization are mandatory to strike the right balance between solderability and reliability. However, localization of the flux residue through the drop jet process is not enough to guarantee the expected performance level. The flux needs to be designed to minimize the impact of unavoidable spreading and splashing events...

Forum search results for related keywords: selective soldering, flux residues, flux spread, satellites, soldering performance.


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