Donut Shaped Solder Preforms for the Pin-in-Paste Process

Indium Corporation Blogging Team

Folks,

Some years ago I created a software tool, StencilCoach^TM to calculate the stencil parameters to provide for an adequate amount of solder paste for the pin-in-paste process. Since solder paste is typically 50% by volume flux, it is often the case that the solder paste cannot supply enough solder to form a proper fillet for the through-hole solder joint. Solder preforms the shape of passives have often been used to supplement the required solder volume.

Figure 1. The input page for donut shaped solder preforms.

Some assemblers might want to use donut shaped solder preforms. So I upgraded StencilCoach™ to be able to perform the calculations for these preforms. Figure 1. shows the input page. Check it out here. Let me know what you think. [email protected].

Cheers,

Dr. Ron

Indium Corporation Blogging Team

Our blogging team includes engineers, researchers, product specialists, and industry leaders. We share expertise in solder materials, electronics assembly, thermal management, and advanced manufacturing. Our blog offers insights, technical knowledge, and solutions to inspire professionals, showcasing product innovations, trends, and best practices to help readers excel in a competitive industry.

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