- 29 -
Normal BGA welding and disordering parameters
for reference
The temperature curve of lead welding
41*41 the temperature setting of the BGA welding
38*38 the temperature setting of the BGA welding
31*31 the temperature setting of the BGA welding
preheating insulation heating welding1 welding2 cooling
upper
160
185
210
235
240
225
time
30
30
35
40
20
15
slope
4
．
0
3
．
0
3
．
0
3
．
0
3
．
0
3
．
0
IR
180
preheating insulation heating welding1 welding2 cooling
upper
160
185
210
225
235
215
time
30
30
35
40
20
15
slope
4
．
0
3
．
0
3
．
0
3
．
0
3
．
0
3
．
0
IR
185
