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The spherical solder paste made from spherical tin powder of domestic solder paste brand Jiajinyuan performs outstandingly in practical test scenarios such as nearly 100% solder climbing rate in QFN/DFN, extremely low void rate, transparent residue and water washability. Its series including 8MQP/5RQ, 8M9P/5RR, 8MW1P/5RW1 all adopt T3/T4 grade high-sphericity 0307/305 alloy powder, which meets the process requirements of high-speed printing solder paste, and satisfies the stringent requirements of automotive electronics, communication terminals and precision consumer electronics for forming effect and reliability.
Published: 2009-02-24QFN package soldering places extremely high requirements on the solder paste's wetting ability, void rate, and residue. The zero-halogen solder paste of the 8M9P/5RR series launched by domestic solder paste brand Jiajinyuan achieves an extremely low void rate. When paired with 0307T4 alloy powder, it forms stably within the 240–255℃ reflow window. Meanwhile, the 8MQP/5RQ series achieves nearly 100% wetting for QFN solder paste thanks to its high activity, making it a key practical option for low-void solder paste and for domestic solder paste to replace imported alternatives.
Published: 2009-02-22BGA chip ball mounting places extremely high demands on the activity, residue, void rate, and alloy compatibility of BGA ball mounting solder paste. Among domestic solder pastes, several halogen-free, lead-free high-temperature solder pastes from Jiajinyuan have been mass-applied in communication, notebook, and automotive electronics production lines. For example, LFP-JJY5RNTT-0307 is suitable for high-precision BGA ball mounting with minimal and transparent residue; LFP-JJY5RR-0307 achieves both zero halogen and extremely low void rate, making it a reliable domestic solder paste alternative to imported chip solder pastes.
Published: 2009-02-20The smoothness of solder paste release from the stencil directly determines SMT printing yield. Domestic solder pastes have made breakthroughs in pain points such as sticking to the stencil, stringing, and aperture clogging. The two halogen-free, lead-free high-temperature solder pastes LFP-JJY5RQ-0307T4 and LFP-JJY5RNTT-0307T4, featuring 0307 alloy powder with T4-grade particle size distribution, ROL0/ROL1-grade low-halogen control, and rosin-based activation systems, achieved a measured release rate of over 98.5% on 0.4mm-pitch QFN components. Their 240–255℃ reflow window is compatible with mainstream reflow oven temperature profiles.
Published: 2009-02-18Tombstoning defects in SMT production lines are mostly caused by the combined effect of uneven solder paste volume and uncontrolled reflow ramp-up rate. By precisely controlling the consistency of solder paste printing thickness, adjusting stencil aperture sizes to match the pads, and stabilizing the ramp-up rate in the reflow preheating zone within the range of 1.2℃/s to 1.8℃/s, the incidence of tombstoning in 0402 to 0603 packaged chip components can be significantly reduced.
Published: 2009-02-17The high rework rate of production lines often stems from poor solder paste wetting, high voiding rates, or uneven residue. This domestic solder paste achieves nearly 100% wetting coverage on QFN/DFN devices through the synergistic optimization of 0307/T4 alloy powder and ROL0 low-halogen formulation, significantly improving first-pass soldering yield. It is a highly adaptable domestic solder paste option for replacing imported SMT solder paste and reducing rework solder paste costs.
Published: 2009-02-16The domestic solder paste brand Jiajinyuan's full range of SGS solder pastes has passed SGS certification, covering 12 major application scenarios including zero-halogen, halogen-free, water-washable, laser, and ultra-low temperature. The environmentally friendly solder paste has a halogen content as low as 0ppm and complies with ROHS/REACH standards. T3-T7 grade alloy powder is suitable for QFN/DFN high-density packaging and the low voidage requirements of automotive lamps, truly achieving the dual guarantee of environmental compliance and production line stability.
Published: 2009-02-14This paper focuses on the practical implementation of IPC solder paste standards. Based on real production line verification data, it recommends multiple domestic solder pastes certified to ROL0/ROL1, covering all scenarios including high-temperature, medium-temperature, low-temperature, and laser welding applications. It highlights the core advantages of the 8MQP/5RQ series with near-100% solder climb rate in QFN packages, the 8M9P/5RR series with zero halogen and low void rate, and the 5RG series with In52Sn48 ultra-low temperature adaptability, providing process and procurement teams with domestic alternative solutions that can be directly benchmarked against IPC standard solder pastes.
Published: 2009-02-12To improve yield, solder paste must be matched to the specific pain points of the production line. Domestic solder pastes such as the 8MQP/5RQ series achieve a near-100% solder climbing rate on QFN/DFN packages. The 8MNTTP/5RNTT series has a halogen content as low as 100~200ppm, making it suitable for high-precision scenarios in mobile phones and fingerprint locks. The 8M9P/5RR achieves zero halogen and an extremely low void rate, truly supporting the practical implementation of domestic substitution for SMT solder paste.
Published: 2009-02-10This article recommends multiple domestic solder paste manufacturers that have been long-term verified on production lines, with a focus on analyzing the real performance of brands such as JJY in core indicators including QFN solder climbing rate, low void rate, zero halogen residue, and laser welding adaptability. It covers the full-scenario requirements of SMT solder paste in high-temperature, medium-temperature, low-temperature, and water-washing applications, providing practical references for engineers to select products and establish stable cooperation with solder paste manufacturers.
Published: 2009-02-08Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.