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To meet the high-reliability soldering requirements of automotive electronics, this paper recommends several domestic solder pastes suitable for key working conditions such as QFN/DFN solder climbing, low void rate, and zero halogen. Covering 8MQP/5RQ, 8M9P/5RR and other series, it balances high-temperature reflow stability and residue transparency, providing a selection basis for automotive solder pastes that can be directly introduced into production lines for the domestic substitution of electronic solders.
Published: 2009-03-06For R&D sample prototyping scenarios, multiple small-packaged domestic solder pastes are recommended, covering types such as halogen-free lead-free high-temperature, zero-halogen, water-washable, and laser-specific. Among them, the 8MQP/5RQ series has a solder wetting rate close to 100%, and the 8M9P/5RR achieves 0ppm halogen content and an extremely low void rate, making it particularly suitable for high-demand working conditions such as QFN/DFN packages and automotive lighting. All models support 10g/20g/50g small packages, meeting the three core demands of prototyping solder paste, small-packaged solder paste, and domestic solder paste.
Published: 2009-03-04500g canned solder paste balances material change frequency and waste control in SMT production lines. The domestic solder paste brand Jiajinyuan's multiple series of halogen-free, lead-free high-temperature solder pastes cover scenarios such as QFN solder climbing, low voidage in automotive lamps, and high-precision communication applications. Its models including 8MQP/5RQ, 8MNTTP/5RNTT, and 8M9P/5RR stand out in T3-T5 alloy powder particle size distribution, halogen content ranging from 100~200ppm to 0ppm, and residue transparency, making them a cost-effective alternative to imported SMT solder pastes.
Published: 2009-03-02To meet the stringent requirements of SMT production lines for solder paste with stable viscosity, several domestic solder pastes are recommended, covering types such as halogen-free and lead-free high-temperature, zero-halogen, water-washable, and laser-specific. Among them, the 8MQP/5RQ and 8MNTTP/5RNTT series stand out in terms of QFN solder climbing rate, residue transparency, and halogen control, making them preferred SMT solder pastes that balance viscosity stability and process adaptability.
Published: 2009-02-28To meet stringent requirements in high-density PCB soldering such as fine pitch, high solder climb rate, and low void rate, multiple domestic halogen-free, lead-free high-temperature solder pastes compatible with T3/T4/T5 grade fine powder solder pastes are recommended, covering high-activity scenarios for QFN/DFN, precision placement in communications and consumer electronics, low-void thermal management for automotive lamps, and special models for laser dispensing. All products use 0307/305 alloy powders with a measured melting point of 217–227℃, balancing printability, wettability, and residue transparency.
Published: 2009-02-26The 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: 2009-02-18The 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: 2009-02-16Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.