Issue link: https://iconnect007.uberflip.com/i/1545206
JUNE 2026 I SMT007 MAGAZINE 55 Applying Silver-free Alloy Design in High-volume Assembly This approach can be seen in materials such as ALPHA® OM-100 SnCX® 07, a no-clean, zero-halo- gen, silver-free solder paste devel- oped for high-volume electronics assembly. From a cost perspective, the alloy offers up to 30% metal savings compared with traditional high-silver alloy combinations, helping reduce material spend and limit exposure to fluctuations in precious metal pricing. From a reli- ability standpoint, test data demon- strate up to a 50% improvement in characteristic life and up to a 40% improvement in drop shock and vibration performance compared with SAC305. At the same time, thermal cycling performance remains comparable to SAC305 alloys for applications operating between -20°C and 100°C, supporting reliability expectations with- out introducing additional risk. Process Stability and Manufacturing Consistency Material performance must translate into consis- tent results on the manufacturing line. For process engineers, this means predictable behavior during printing and reflow, as well as stability across extended production runs. The material supports a wide print process win- dow, consistent transfer efficiency, up to 16 hours of stencil life under typical ambient conditions, and is compatible with both air and nitrogen reflow environments. In high-volume manufacturing environments, where throughput, uptime, and yield consistency are closely tied to operational efficiency, these characteristics enable manufacturers to capture cost and processing benefits without introducing additional complexity or variability. Reframing Material Selection in Electronics Assembly Material selection in electronics assembly contin- ues to evolve as design, process, and procurement teams reassess priorities. There is an increas- ing focus on real-world performance, alongside strategies that enhance cost stability and improve resilience to market variability. Silver-free solder pastes sit at this intersection, offering a path to reduce reliance on precious metals while maintain- ing process stability and mechanical performance. For assemblies operating below 100°C, particular- ly in high-volume consumer and appliance applica- tions, silver-free solder materials provide a practical way to align cost, reliability, and manufacturability with current product requirements, production de- mands, and competitive market pressures. SMT007 To learn more about silver-free solder solutions, including ALPHA OM-100 SnCX 07, visit macdermidalpha.com or connect with a technical expert to identify the right solution for your application. Ebad Rehman is global product manager, Solder Paste, at MacDermid Alpha Electronics Solutions. This shift has driven renewed interest in alternative alloy designs that can better balance mechanical robustness with process stability." "