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High quality laser beam soldering

: Bosse, L.; Schildecker, A.; Gillner, A.; Poprawe, R.


Microsystem Technologies 7 (2002), No.5-6, pp.215-219
ISSN: 0946-7076
Journal Article
Fraunhofer ILT ()
pyrometric process control; laser beam soldering; processing head; integrated pyrometric sensor; soft soldering; high speed photography; secondary emission; pyrometric signal; process emission; process sequence; solder joints; process control

In the work presented the potential of a pyrometric process control during laser beam soldering will be enhanced. Primarily we have developed a processing head with an integrated up-to-date pyrometric sensor conditioned for the temperature range of soft soldering. Using high speed photography we have analysed the detected secondary emissions during laser beam soldering and correlated the acquired pyrometric signals of process emissions with processes sequencing. Finally we named different strategies and control methods to achieve reliable high quality solder joints implementing a pyrometric process control.