National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Electrochemical Migration of Flux Residues and Sirface Insulation Resistance Changes
Hájka, Jan ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This thesis deals with electrochemical migration on printed circuit boards induced by flux residues. In the theoretical part of the thesis, the theory related to electromigration is discussed and the mechanisms of each type are described. The theory of fluxes is elaborated, focusing on the VOC-free fluxes Pacific 2009 mlf and Kester 979 T. In the practical part, the fabrication of test PCBs is described and the reproducibility of the fabrication process is observed. Furthermore, a methodology for testing the effect of flux residues on the surface insulation resistance according to the relevant standard is proposed. The proposed methodology is applied to compare the above mentioned fluxes and surface treatments.
Flux Residues after Reflow Soldering
Uhlář, Vít ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
The aim of this bachelor thesis is to solve flux residue characteristics on PCBś after reflow soldering and compare different solder pastes. The first part deals with the issue of solder paste application and flux residues. The second part focuses on the process of reflow soldering. The third part is devoted to the measurement methodology of flux residues. Finally, project is a practical part, which is summarized in the production of test samples and contains measurement results.
Flux Residues after Reflow Soldering
Uhlář, Vít ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
The aim of this bachelor thesis is to solve flux residue characteristics on PCBś after reflow soldering and compare different solder pastes. The first part deals with the issue of solder paste application and flux residues. The second part focuses on the process of reflow soldering. The third part is devoted to the measurement methodology of flux residues. Finally, project is a practical part, which is summarized in the production of test samples and contains measurement results.

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