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Here you can find knowledge about High Anti-Oxidation Solder Bar, including but not limited to usage methods, installation techniques, troubleshooting and more. Focused on SMT soldering processes. If you can't find what you need, please contact us anytime.
Cold soldering is one of the most stubborn soldering defects in SMT production of large thick copper boards, occurring frequently especially on PCBs with copper thickness ≥2oz and dimensions ≥400mm×300mm. The root cause is that the large heat capacity of the copper substrate and delayed temperature rise lead to insufficient solder paste reflow. In production line tests, Jiajinyuan cold soldering repair paste can reduce the cold soldering defect rate from 1.8% to below 0.3%.
Published: 2018-02-07Selective wave soldering significantly reduces changeover time and fixture debugging frequency by precisely positioning soldering areas and skipping already surface-mounted components. In multi-variety, small-batch PCBA production, it compresses the preparation cycle per batch to within 15 minutes, greatly improving overall equipment effectiveness, and serves as the core process support for Jiajinyuan models to achieve high output in small and medium batch order scenarios.
Published: 2017-12-09High-voltage and insulation testing in PCBA reliability testing is a critical process on the production line for determining whether a circuit board has potential risks of current leakage, creeping discharge, or dielectric breakdown. By applying a specified voltage and monitoring changes in leakage current, it can effectively identify real production line issues such as PCB lamination defects, solder bridging, flux residue, and insufficient cleanliness, providing a hard safety threshold for the delivery to JJY customers.
Published: 2017-11-27High-viscosity solder paste significantly improves the placement offset issues of 0201, 0402 and other tiny components as well as irregular devices in SMT production, and is especially suitable for complex scenarios such as double-sided reflow, stepped stencils, and high-density board layouts. Its characteristics of strong thixotropy, low slump rate, and long room-temperature holding time reduce the component displacement rate during the solder paste placement process by more than 40%, while easing the pressure on the waiting window from after printing to before placement.
Published: 2017-04-26High-frequency PCB soldering is extremely sensitive to the halogen content and residue control of solder paste. Jiajinyuan halogen-free low-residue solder paste, by optimizing the rosin system and activator ratio, ensures wettability while reducing ionic contamination to below 0.25μg/cm2, significantly minimizing impedance fluctuations and phase shifts in high-frequency signal transmission.
Published: 2016-12-13High tensile strength of connector solder joints directly improves the reliability of the whole machine. Jiajinyuan connector solder, by optimizing the ratio of tin-silver-copper and active flux components, achieves an average tensile strength ≥8.2N at a conventional reflow peak temperature of 235℃, with no solder joint detachment, no cold solder joint, and no solder joint cracks after 100 insertion and removal cycles. It is especially suitable for industrial control and automotive electronics production lines under high-frequency vibration conditions.
Published: 2016-08-02Excessively high peak reflow temperature of solder paste will directly lead to excessive growth of intermetallic compounds in solder paste joints, intensified dissolution of pad copper, and thermal damage to component bodies. In actual production lines, common defects include cold solder joints, solder balls, tombstoning, and PCB delamination. This problem mostly stems from inaccurate temperature profile settings, drift of furnace temperature sensors, or uncalibrated differences in activity between different batches of solder paste.
Published: 2015-12-10
Prolonged high-temperature operation of solder bars in a wave soldering furnace can indeed cause micro-segregation of alloy components. Particularly when tin-lead or lead-free solder bars are continuously exposed to temperatures above 260°C with insufficient bath surface agitation, elements such as lead, silver, and copper may locally enrich due to differences in density and oxidation rate. However, within the standard 8-hour solder replacement cycle, compositional variations remain well below the tolerances permitted by IPC-J-STD-006. What truly affects soldering stability is often the accumulation of dross and carbonized flux residues.
Published: 2015-10-14High-frequency board welding imposes extremely high requirements on the thermal sensitivity of the substrate. Materials such as PTFE and ceramic-filled PP generally have a glass transition temperature below 170°C. If the peak reflow temperature exceeds 260°C, it can easily cause delamination, blistering, or dielectric constant drift. Actual measurements on Jiajinyuan's production line show that 255°C is the safe threshold for most high-frequency board welding. Thermal damage must be avoided through stepwise heating, reducing residence time in the high-temperature zone, and nitrogen atmosphere control.
Published: 2015-10-08To address the failure risk of moisture-absorbed solder paste in the high-humidity environment of the solder paste workshop, this solution starts from three aspects: dynamic temperature and humidity monitoring, solder paste protection process reengineering, and shelf-life control after opening. It specifies 25℃/60%RH as the critical threshold, stipulates that solder paste must be used up within 4 hours after opening, and emphasizes the key role of coordinated adjustment of nitrogen-protected storage and squeegee pressure in reducing printing defects caused by moisture-absorbed solder paste.
Published: 2015-03-07Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.