Nichia STS-DA1-0073
<Cat.No.071226>
(4) Soldering Conditions
· The LEDs can be soldered in place using the reflow soldering method. Nichia cannot make a
guarantee on the LEDs after they have been assembled using the dip soldering method.
· Recommended soldering conditions
Reflow Soldering
Lead Solder
Pre-heat
Pre-heat time
Peak
temperature
Soldering time
Condition
10 sec. Max.
refer to
Temperature - profile
1
.
10 sec. Max.
refer to
Temperature - profile
2
.
(N
2
reflow is recommended.)
120
~
150°C
120 sec. Max.
240°C Max.
Lead-free Solder
180
~
200°C
120 sec. Max.
260°C Max.
Temperature
Soldering time
350°C Max.
3 sec. Max.
(one time only)
Hand Soldering
Although the recommended soldering conditions are specified in the above table, reflow or hand
soldering at the lowest possible temperature is desirable for the LEDs.
A rapid-rate process is not recommended for cooling the LEDs down from the peak temperature.
[Temperature-profile (Surface of circuit board)]
Use the conditions shown to the under figure.
<
1
: Lead Solder>
<
2
: Lead-free Solder>
2.5 ~ 5°C / sec.
Pre-heating
120 ~ 150°C
60sec.Max.
Above 200
°C
120sec.Max.
1~ 5°C / sec.
240°C Max.
10sec. Max.
1~ 5°C / sec.
Pre-heating
180 ~ 200°C
60sec.Max.
Above 220
°C
120sec.Max.
260°C Max.
10sec. Max.
2.5 ~ 5°C / sec.
[Recommended soldering pad design]
8.8
4.0
2.9
2.9
4.0
Use the following conditions shown in the figure.
2.0
4.0
(0.25)
(1.5)
: Solder resist
(Unit : mm)
· Occasionally there is a brightness decrease caused by the influence of heat or ambient atmosphere
during air reflow. It is recommended that the User use the nitrogen reflow method.
· Repairing should not be done after the LEDs have been soldered.
When repairing is unavoidable,
a double-head soldering iron should be used.
It should be confirmed beforehand whether the
characteristics of the LEDs will or will not be damaged by repairing.
· Reflow soldering should not be done more than two times.
· When soldering, do not put stress on the LEDs during heating.
· After soldering, do not warp the circuit board.
-6-
NICHIA [ NICHIA CORPORATION ]
