Huawei MU609 - Page 10

7
Reflow parameters
Temperature Zone
Time
Key Parameter
Preheat zone (40°C–150°C)
60s–120s
Heating rate:
0.5°C/s–2°C/s
Soak zone
(150°C –200°C)
(t1–t2): 60s–120s
Heating rate: < 1.0°C/s
Reflow zone (> 217°C)
(t3–t4): 30s–90s
Peak reflow
temperature:
230°C–250°C
Cooling zone
Cooling rate: 1°C/s ≤ Slope ≤ 4°C/s