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This article compares key lead-free solder paste systems—including SAC305, SAC405, SN100C, and SC27—by analyzing their melting behavior, wetting performance, mechanical reliability, and compatibility with common PCB surface finishes like ENIG, OSP, and immersion silver, while emphasizing practical trade-offs in stencil life, slump resistance, voiding tendency, and rework sensitivity encountered during high-volume SMT production.
Published: 2026-11-08
The selection of no-clean solder paste and water-washable solder paste in SMT production lines directly determines yield, cost, and delivery rhythm. No-clean solder paste, with advantages such as residue ion content <0.5μg/cm2, eliminating the cleaning process to save 2.3 hours of production capacity per shift, and no need for water-based cleaning equipment investment after reflow, is suitable for high-density fast-turnaround production lines. While water-washable solder paste requires supporting spray cleaning machines and DI water systems, its rosin-based activity is stronger, improving the wetting force on OSP boards and oxidized pads by more than 40%, making it more suitable for high-reliability scenarios such as military industry and automotive electronics.
Published: 2026-08-27
The SAC305 and Sn99.3Cu0.7 solder paste alloys exhibit significant differences in actual SMT production lines. SAC305 has better wettability and thermal fatigue resistance, while Sn99.3Cu0.7 offers lower cost and a narrower melting range window due to its silver-free composition. For both alloys, dynamic trade-offs must be made in terms of printability, reflow void rate, solder joint strength, and long-term reliability, taking into account specific component types, board thickness, and reflow oven temperature zone configuration.
Published: 2026-08-27Our company, JJY, holds the ISO14001 environmental management system certification, has established a complete standardized environmental management system, regulates environmental protection control throughout the entire production process, implements green compliant production, ensures stable product quality and production compliance, and fully meets the requirements of customer factory audits, supply chain audits, and export compliance.
Published: 2026-08-24Quality is the core competitiveness of electronic solder enterprises, and it is also the core access standard for the supply chain in high-end electronic fields such as industrial control, medical treatment, communications, new energy vehicles, and LED lighting.
Published: 2026-08-24Medical electronic equipment has extremely stringent requirements for the purity, ionic residue and long-term reliability of solder materials. With its strictly controlled metal composition, low halogen content and batch stability, ISO solder materials have become the first choice for SMT production lines of implantable and monitoring devices. Jiajinyuan ISO solder materials have passed the biocompatibility pre-assessment of IEC 60601-1 Appendix A. In actual production lines, the ionic residue on the board surface after reflow is <0.85μg/cm2, and the copper mirror corrosion test shows no discoloration for over 72 hours.
Published: 2025-01-15
All Jiajinyuan solder paste products continue to pass the dynamic and effective control of RoHS, halogen-free, SGS and ISO systems, covering more than ten types of细分 scenarios such as high temperature, medium temperature, low temperature and laser welding. Among them, 8MQP/5RQ series solder paste achieves nearly 100% solder climbing rate for QFN/DFN, 8M9P/
Published: 2024-02-01When foreign trade customers screen ISO solder material suppliers, they focus on the coverage of system certifications, batch traceability, and production line process control capabilities. Jiajinyuan operates under the dual IATF 16949+ISO 9001 system, implements SPC monitoring across all processes, and provides actual solder paste thermal cycling test reports, raising the one-time pass rate of customer factory audits to 92% and directly shortening the new project introduction cycle by 11 days.
Published: 2022-01-14Jiajinyuan has passed the ISO factory audit for solder materials and can provide authentic and valid ISO system certificates, covering production process control of the full range of products including solder paste, solder wire, and flux, ensuring that each batch of ISO solder materials meets the requirements of standards such as IPC-J-STD-005 and JIS Z3197, and satisfying the second-party audit needs of automotive electronics and medical equipment customers.
Published: 2021-05-24Solder OEM contract manufacturing embeds the ISO 9001 quality management system throughout the entire process, covering incoming raw material inspection, melting parameter monitoring, wire drawing tension calibration, and packaging environment temperature and humidity recording. It achieves a melting point deviation of ≤±1.2℃ for each solder batch, controls the fluctuation of rosin residue within the range of 0.35% to 0.42%, ensures no downtime during material changeover on SMT production lines and zero adjustment of reflow profiles, and truly supports batch stability in solder OEM contract manufacturing delivery.
Published: 2015-11-29Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.