Flux-free vacuum soldering

vacuum soldering

Flux-free vacuum soldering with preforms is very unique compared to conventional soldering techniques with paste. A set of completely different parameters must be considered for the development of soldering profiles. As the removal of contaminations is severely limited at flux-free soldering, the material quality of the components is crucial. Mostly, formic acid, hydrogen, forming gas or plasma is used to reduce surface oxides.

We offer advanced vacuum soldering training courses, which will enable engineers to develop more robust soldering processes in a shorter amount of time.

Possible training and project contents:

  • Development of flux-free soldering profiles
  • Typical faults that arise during soldering and temperature profiling
  • Temperature measurement techniques and sources of errors
  • Influence of previous processes on the paste-free soldering
  • Material quality check, soldering jigs and fixtures, as well as systems with rapid testing functions
  • Identification of save process windows
  • Transfer of laboratory processes to mass production
  • Introduction of inline measurements and statistical process control
seminars for data science

Articles about flux-free soldering:

  • In part four of the article series Process development for fluxless soldering we deal with the process window and process control....

  • In the third part of the article series process development for flux-free soldering we deal with temperature measurement, profiling, wetting and soldering tests....

  • In part 2 of the article series "Process development for flux-free soldering", we deal with the solder alloy and the effective temperature of the reducing agent....

  • Compared to standard reflow soldering with paste, the process development for paste-free soldering is much more elaborate. It is crucial to consider the quality requirements of the product from the very beginning. A preform is defined as a rolled metal sheet that consists solely of the solder alloy. This article discusses the most common requirements and presents, step-by-step, the systematic process development of flux-free soldering....

  • In our previous article we discussed that paste-free (flux-free) soldering is like cooking. You need the best ingredients and equipment to achieve great results. In this article, the main influences on quality of the soldering results are described. Nowadays, the flux-free soldering process is an established, high-quality alternative to conventional paste soldering. ...

Do you have further questions regarding vacuum soldering? Do not hesitate to contact us!