Starting from January 2026, against the multiple backdrops of the penetration rate of new energy vehicle electronics exceeding 73%, the number of solder joints per AI server increasing by nearly 2.4 times compared to 2023, and the continuously rising requirements of aerospace microsystems for wide-temperature-range (-55℃ to 150℃) soldering reliability, the SMT Solder market has shown obvious structural growth characteristics. The shipment volume of traditional general-purpose tin-lead solder is stabilizing, while the order share of high-reliability SMT solder adapted for high-density interconnection, high-power heat dissipation and long-life service scenarios has risen to 38.6%, a 9.2 percentage point increase from the same period in 2024.

Senju Metal Industry officially launched mass production of the MX-8200 series high-temperature lead-free solder in February 2026. This material has a melting point of 260℃ and a thermal fatigue life of over 3000 cycles. It has currently passed the verification on the automotive MCU module production line of Bosch's Changzhou plant, and is simultaneously providing small-batch trial samples to three leading domestic SiC power module packaging manufacturers. Its Shenzhen Technology Center has also launched the pilot test of micron-level tin-silver-copper Alloy Solder for Chiplet heterogeneous integration scenarios. In the first quarter of 2026, Superior Technical Resources completed the mass production introduction of M7500-LowVoid Solder Paste. This SMT solder adopts a dual-particle-size spherical powder ratio and a new rosin-based active system, with the void rate stably controlled within 3.7% in 0.3mm pitch QFN packaging, and has been designated for adoption in a 5G base station SoC packaging and testing project of HiSilicon.

For domestic manufacturers, Guangdong Yixinfeng announced in March 2026 that its independently developed EAF-N2 series nitrogen-compatible no-clean solder paste has passed the IPC-J-STD-004B Class L0 certification. This SMT solder has a residual ion content of less than 0.8μg/cm2 after Reflow Soldering in an O? concentration ≤100ppm environment, and has achieved full-process replacement of imported models on the AirPods Pro 4 wireless charging module production line at Luxshare Precision's Dongguan base. Shanghai Kaibo is simultaneously advancing the domestic research and development of aerospace-grade SMT solder. Its KP-901A silver-doped tin-silver-copper solder has completed three rounds of batch environmental stress screening tests at the Fifth Academy of China Academy of Space Technology. The solder joint shear strength retention rate is greater than 92.4% after high-temperature high-humidity and thermal vacuum composite tests, and it is expected to enter the small-batch installation verification stage on the payload PCBA of a certain type of low-orbit communication satellite in the second half of 2026.

At the industry level, IEC/TC91 released the new CDV draft of "Specification for Solder Alloys for Electronic Assembly" in April 2026, which for the first time included "solder joint electromigration suppression capability" and "interfacial IMC layer growth rate under thermomechanical cycling" as mandatory evaluation items, forcing SMT Solder Manufacturers to strengthen their capabilities in microstructure regulation and interfacial reaction kinetics research. Currently, seven domestic enterprises have established interdisciplinary joint laboratories, focusing on the Sn-Ag-Cu-X multi-element microalloying path and the suppression mechanism of ion migration of Flux residues. Relevant achievements have not yet formed patent disclosure or mass production transformation, but have constituted the key underlying support for the technological evolution of SMT solder in 2026.