User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 67 / 83
It is suggested that peak reflow temperature is 235 ~ 245ºC (for SnAg3.0Cu0.5 alloy). Absolute max
reflow temperature is 260ºC. To avoid damage to the module when it was repeatedly heated, it is
suggested that the module should be mounted after the first panel has been reflowed. The following
picture is the actual diagram which we have operated.
Time
50
100
150 200
250 300
50
100
150
200
250
160 ºC
200 ºC
217
0
70s~120s
40s~60s
Between 1~3 ºC/s
Preheat Heating Cooling
ºC
s
Liquids Temperature
Temperature
Figure 40: Liquids Temperature