how to tin fine pitch leads - SMT Electronics Manufacturing

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Lead-free SMT Soldering Defects How to Prevent Them

Technical Library | 2012-10-23 14:25:38.0

Tin-Silver-Copper alloys are the primary choice for lead-free SMT assembly. Although there are other options available such as alloys containing bismuth or indium and other elements, tin-silver-copper solders, also known as SAC alloys are by far the most popular. They are used by approximately 65% of users, as last surveyed by Soldertec in 2003.

Kester

Lead-free and Tin-lead Assembly and Reliability of Fine-pitch Wafer-Level CSPs

Technical Library | 2007-05-31 19:05:55.0

This paper discusses solder paste printing and flux dipping assembly processes for 0.4 and 0.5mm pitch lead-free WLCSPs and the corresponding assembly results and thermal cyclic reliability obtained. Variables evaluated include reflow ambient, paste type, and stencil design. Reliability is also compared to results for the same components assembled under identical conditions using SnPb solder.

Universal Instruments Corporation