Profilage thermique SMT

Le profil de reflux nécessite 4- Optimisation de phase: Preheat (1-3 degré / s), SOAK (60-120 s à 150-180 degré), reflow (30-60 s au-dessus de 217 degrés), refroidissement (refroidissement (refroidissement<6°C/s). KIC thermal profilers use predictive algorithms for complex boards. Thermocouples attach to thermal mass areas for accuracy. Nitrogen environments permit 10°C lower peak temperatures. Ramp-to-spike profiles reduce tombstoning. DOE methods correlate profile settings with shear strength. Standards: IPC-7531 guidelines for profile validation.