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9
Production Requirement
Recommended welding thermal cycle curve is as follows:
Figure 9-1 Soldering Temperature
Temperature rising Stage
Rising slope: Max. 3
℃
/s
Rising temperature range
：
50
℃
-150
℃
Preheating stage
Preheating time: 60 – 120 s
Preheating temperature range: 150 - 180
℃
Reflux Stage
Over melting temperature(217
℃
) time: 40 – 60 s
Peak temperature for welding: no higher than 245
℃
Cooling Stage
Cooling Slope: Max. 4
℃
/ s
Notes
：
In order to prevent fall off during welding of modules, please avoid welding the module
in the back of the Board during design, that is, better not go through welding cycle twice
The setting of welding temperature depends on many factors of the factory, such as
