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BGA 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: 2009-02-20Tombstoning 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: 2009-02-17To address production-line pain points such as prone solder joint failure, poor solder wetting, high void rate, and excessive halogen residue under high-temperature operating conditions, domestic temperature-resistant solder paste has achieved stable adaptation to reflow windows from 235°C to 260°C. The 8MQP/5RQ series achieves a solder wetting rate of over 95% on QFN/DFN devices, while the 8M9P/5RR series supports automotive lighting thermal management modules with 0 ppm halogen and an extremely low void rate. Multiple high-temperature solder paste models form a closed process loop with domestic stencils, jet dispensers, and nitrogen reflow ovens, truly resolving the bottlenecks that have hindered the deployment of domestic solder paste in high-reliability scenarios.
Published: 2009-01-29Frequent solder paste clogging in stencils directly affects the efficiency and yield of SMT production lines. By optimizing the particle size distribution of alloy powder, the rheological properties of the rosin carrier, and the control of halogen residues, domestic anti-clogging solder paste achieves stable release and high solder wetting rates in fine-pitch printing applications such as QFN/DFN. A typical example is the 8MQP/5RQ series T4 powder paired with 0307 alloy, which balances printability and reflow performance, making it a cost-effective alternative to imported printing solder paste.
Published: 2009-01-23Domestic solder paste with clear printing and forming profiles must balance thixotropy, powder distribution, and reflow wettability. The Jiajinyuan 8MQP/5RQ series achieves high-resolution printing while delivering near-100% solder fillet climb rate on QFN packages. The 8MNTTP/5RNTT variant, with its ultra-low halogen content of 100~200ppm and T5-grade fine powder, is tailored for high-precision consumer electronics. These solder pastes with excellent forming performance have been batch-validated on SMT production lines, making them a reliable domestic alternative to imported SMT solder paste.
Published: 2009-01-21Domestic solder paste brand Jiajinyuan has achieved one-time pass in reliability testing for multiple halogen-free, lead-free high-temperature solder paste products on customer production lines, covering scenarios such as QFN/DFN high solder climbing, zero-halogen automotive lamps, laser welding, and aluminum/stainless steel soldering. Its 8MQP/5RQ series has a solder climbing rate close to 100%, and the 8M9P/5RR series has an extremely low void rate. The entire product line is compatible with T3-T5 alloy powder and a 240–260℃ reflow window, making it a cost-effective and reliable solder paste solution for replacing imported SMT solder paste.
Published: 2009-01-11For high-frequency soldering defects on SMT production lines such as poor QFN solder climbing, solder balls, high voiding rate, and whitish residues, domestic solder paste can be quickly switched and adapted to improve defects by precisely matching alloy powder types (T3/T4/T5), halogen levels (ROL0 to ROL1), and rosin/water-washable types. SMT solder pastes including LFP-JJY5RQ-0307T4 and LFP-JJY5RR-305 have been batch-verified in automotive lamps, fingerprint locks, and Bluetooth modules, balancing high solder climbing rate with zero-halogen reliability.
Published: 2009-01-07Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.