Assertion: solder's flux | /r/AtLocation | the solder paste
Facets:
Source sentences:
text: Because selective soldering applies heat to only one place on the board, flux contained in the solder paste might not activate properly, causing flux residue to spread to other parts of the board.
text: Rapid evaporation of the flux contained in the solder paste can lead to defects, such as lead lift, tombstoning, and solder balls.