#smtprocess

PCB (Printed Circuit Board) assembly lines are automated production systems used to place, solder, and test electronic components on circuit boards quickly and accurately; the process starts with solder paste printing, followed by pick-and-place machines positioning components, then reflow soldering to permanently fix them, and finally inspection and testing (AOI/functional tests) to ensure quality and performance—modern assembly lines focus on speed, precision, and defect reduction, making them essential for producing reliable electronics at scale.

In STHL's SMT workshop, reflow soldering is not just a process step, but a core technology determining soldering reliability. We use precise temperature control to ensure every solder joint reaches a perfect state.

2 x 10-zone reflow ovens + 1 x 8-zone reflow oven

Supports soldering needs from simple single-sided boards to complex HDI boards

Optional nitrogen process, oxygen concentration < 1000ppm

Oxidation rate reduced by 90%, resulting in bright and full solder joints

Stable temperature rise, safe solvent evaporation

Fluoride activation, oxide removal

Precise temperature control, achieving perfect eutectic bonding

Optimized solidification structure, improved solder joint strength

► Lateral Temperature Difference < ± 2℃

► Supports lead-free/lead-containing process switching

► Real-time temperature profile monitoring and traceability

BGA void rate controlled below 8%

Soldering defect rate reduced by 35%

Supports automotive electronics-grade reliability requirements