Soldering/Cleaning Methods
FLOW
REFLOW
Hot Air,
Infrared
(Solvent)
X
Vapor Phase
Wave
Wave
Process Step
(Solvent)
X
(Solvent)
(Aqueous)
Material
RMA
1. Solder Paste Printing
2. Adhesive Application
3. Switch Placement
4. Adhesive Cure
X
X
X
X
X
X
X
Epoxy
X
X
These are the common
methods, materials and
maximum temperature/
time parameters for
soldering and cleaning
processes:
5. Flux Application
5. Flux Application
6. Solder (Reflow)
7. Solder (Flow)
Rosin
X
X
Organic Acid
63/37 Sn/Pb
63/37 Sn/Pb
ODS Free
X
X
X
X
X
X
8. Wash (Solvent)
9. Wash (Aqueous)
High Pressure Fluids
Ultrasonics
X
X
DI H2O; Detergent
X
X
X
Max. Temp.(°C)/Time (Seconds)
240/30
215/180
260/5
260/5
6 7 8 9
Solder
Solder
Wash
Wash
Reflow; Convection,
IR and Vapor Phase
Flow (Wave)
Solvent
Aqueous
GENERAL
GENERAL
GENERAL
GENERAL
Preheat sufficiently using both time
and temp. to bring the flux to activa-
tion and minimize thermal shock.
Consult your solder paste supplier for
the recommended profile.
For maximum component reliability
and performance, minimize the time
of temp. exposure above 200°C.
Use solvent cleaning primarily
for nonpolar contaminants
such as rosin based flux
residues.
Use aqueous cleaning primarily
for polar contaminants such as
organic flux residues.
RECOMMENDED
Typical alloy is Sn63/Pb37. A typical
wave solder zone profile is 245˚C for
5 sec.
RECOMMENDED
RECOMMENDED
Use any suitable washing sol-
vents that meet ODS require-
ments.
Use De-ionized or Reverse
Osmosis water with multistage
rinsing. Post bake at 100˚C for
30 minutes to remove any resid-
ual moisture.
RECOMMENDED
Typical IR/Convection profile.
PRE-HEATING SOLDERING GRADUAL COOLING
PRE-HEATING SOLDERING GRADUAL COOLING
CAUTION
Limit excessive direct spray
pressure to 60 psi.
(in air)
(in air)
(in air)
(in air)
CAUTION
Limit excessive direct spray
245°C
200°C
200°C
230°C
pressure to 60 psi.
100°C
0°C
100°C
0°C
Allow the assembly to suffi-
ciently cool prior to the wash-
ing operation for minimized
thermal stress.
ONE MINUTE
MIN.
Allow the assembly to sufficient-
ly cool prior to the washing oper-
ation for minimized thermal
stress.
5 SECOND
MAX.
ONE MINUTE
MIN.
20 SECOND
MAX.
Use convection or Vapor Phase when
possible and minimize the time above
reflow temperature.
CAUTION
Always preheat before the soldier
wave using the temperature for flux
activation recommended by the man-
ufacturer.
CAUTION
Do not exceed time and temperature
reflow profile of 240°C for 30 sec. for
Hot Air/IR reflow and 215°C for 3
minutes for vapor phase reflow.
Board Rework Technique
Do not exceed 240˚C peak tempera-
ture for dual wave solder process
with a flow zone totaling 5 seconds.
RECOMMENDED
Hot air reflow technique is pre-
ferred. Use No Clean or Rosin
based fluxes only, OA fluxes are
recommended.
Minimize thermal shock by limiting
temperature ramps to 3°C/sec. and by
stabilizing board and component tem-
perature during preheating.
Minimize thermal shock by limiting
temperature ramps to 3˚C/sec. and by
stabilizing board and component
temperature during preheating.
GENERAL
CAUTION
Excessive and/or repeated high
temperature exposure may
affect the component perfor-
mance and reliability.
Avoid the use of wave soldering
or soldering irons as a rework
technique. Avoid repeated and
excessive temperature exposure.
Specifications are subject to change without notice.
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