Indium Blog

Solar Grade Solder Paste Choices

Category:
  • Halogen Free
  • Indium
  • Indium Corporation
  • Solar
  • Solder
  • Soldering
  • Solder Paste
  • Solderability
  • Soldering Materials

  • I had a call with a few engineers today who wanted me to answer a question, “Which solder paste do I pick for my application.” Sure there were a few application-specific details that I feel were too specific to discuss with a general audience, but I think I can answer the question for any of you that are out there wondering the same question while reading this.

     

    It’s an easy answer really; start with SR-8 unless:

    1)     You are using laser reflow equipment.

    2)     You have noticed solder spatter issues related to your design.

    3)     Your company or end customers require you to use only halogen-free materials

    4)     The residue must be clear and almost non-existent (ultra-low residue levels)

     

    If you said “yes” to any of the above, you’ll want to try SR-7 (as long as you have nitrogen reflow capability). If you said yes to answer 3 (halogen-free) but you do not have nitrogen reflow capability, try SR-089.  

     

    Jim’s note: This post was written in August 2010 – but it will be available to anyone searching for the info for quite some time. For updated information on newer solder pastes, send an email to Solar@Indium.com. Thanks! ~Jim

    Authored by previous Indium Application Manager Jim Hisert