On January 10, 2026, at the Shenzhen International Electronics Exhibition ELEXPO, multiple core SMT Solder suppliers simultaneously exhibited new generation process-adaptive products. Senju Metal Industry launched the MX-8800 series ultra-fine particle size Solder Paste, with D50 particle size controlled at 15.2 microns and oxygen content below 120ppm. It has completed 3000-piece continuous trial production verification on a 7nm packaging substrate production line of HiSilicon, with solder joint void rate stably controlled within 3.1%, a decrease of 1.8 percentage points compared to the previous generation product. The batch data has been confirmed by a third-party SGS report. Shengmao Technology simultaneously released the ST-9200A nitrogen-dedicated solder paste, achieving a solder ball occurrence rate below 0.07 pieces/cm² under a reflow window with a peak temperature of 260°C and a heating rate of 2.3°C/second. It has currently been introduced into the automotive-grade IGBT module mounting production line of BYD Semiconductor, covering the entire AEC-Q200 certification process.

Weiteou disclosed the mass production progress of its environmentally friendly water-washable solder paste WQ-3000B at its Dongguan Songshan Lake base. This product has a halogen residue below 350ppm and an ionic contamination value less than 0.8μg/cm², meeting the IPC-J-STD-004C Class L0 standard. It has currently passed the double-blind test of the vivo X100 Ultra motherboard manufacturer, with cleaning yield increased to 99.97%, reducing VOCs emissions by approximately 62% compared to the originally used solvent-based solder paste. The relevant process parameters have been simultaneously entered into the CEAC SMT material database for downstream customers to access. Yunchuang Precision, on the other hand, launched its second SMT solder nano-coating pilot line in Suzhou Industrial Park, adopting in-situ polymerization coating technology to increase the bonding degree between the rosin carrier and activator molecules to 91.3%. Measured in the soldering of 0.3mm pitch QFN devices, the bridging defect rate decreased by 44%. This technical route has not been patented but has entered the secondary material access evaluation process of Huawei's supply chain.

At the industry level, statistics from the China Electronic Materials Industry Association for the fourth quarter of 2025 show that the R&D investment intensity of domestic SMT solder enterprises reached 5.7%, 1.9 percentage points higher than the overall average of electronic chemicals. Among them, the proportion of PhDs among R&D personnel in leading enterprises rose to 18.6%, an increase of 5.2 percentage points compared to 2023. Meanwhile, end customers' tolerance for batch-to-batch melting curve deviation of solder has tightened from ±1.5°C to ±0.7°C, forcing material manufacturers to strengthen their process quality control capabilities. Currently, 6 suppliers have passed the full-process SPC data direct connection certification of IPC-A-610H Appendix K. It is worth noting that the technical teams of some Japanese manufacturers in China are accelerating their localized response pace. Since November 2025, the Kyocera Chemical Shanghai Application Laboratory has compressed the average customer issue closure cycle from 72 hours to 38 hours, mainly relying on the newly added online XRF composition rapid inspection and pyrolysis GC-MS online analysis platform.

The current evolution of SMT solder technology no longer solely pursues lower melting points or enhanced activity, but focuses on collaborative research around interface metallurgical behavior modeling, Flux volatilization kinetics simulation, and solder joint microstructure evolution paths during reflow in high-density interconnection scenarios. The industry consensus is shifting from "material usability" to "process reliability". This shift has formed clear clauses in the SMT process audit checklists of foundries such as Luxshare Precision and Foxconn Zhengzhou Park, requiring suppliers to provide solder joint IMC layer thickness change curves and shear force attenuation data after no less than 2000 temperature cycles. The relevant technical thresholds are being substantially raised.