CERAMIC CHIP INDUCTORS
9. SOLDERING AND MOUNTING :
9-1. Recommended PC Board Pattern
3.00
1.00
C3 SERIES
9-2. Soldering
Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused
by the difference in coefficients of expansion between solder, chip and substrate. The terminations are suitable for all
wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot
air soldering tools.
9-2.1 Lead Free Solder Re-flow :
Recommended temperature profiles for re-flow soldering in Figure 1.
9-2.2 Solder Wave :
Wave soldering is perhaps the most rigorous of surface mount soldering processes due to the steep rise in temperature
seen by the circuit when immersed in the molten solder wave. Due to the risk of thermal damage to products, wave
soldering of large size products is discouraged. Recommended temperature profile for wave soldering is shown
in Fig. 2
9-2.3 Soldering Iron (Figure 3) :
Products attachment with soldering iron is discouraged due to the inherent process control limitations. In the event that
a soldering iron must be employed the following precautions are recommended.
Note :
d) 1.0mm tip diameter (max)
a) Preheat circuit and products to 150°C.
e) Use a 20 watt soldering iron with tip diameter of 1.0mm
b) 350°C tip temperature (max)
f) Limit soldering time to 3 secs.
c) Never contact the ceramic with the iron tip
Preheating
Soldering
20~40s
TP(260°C/10s max.)
217
200
150
60~180s
480s max.
25
60~150s
1.00
PC board should be designed so that products are not sufficient
under mechanical stress as warping the board.
Products shall be positioned in the sideway direction against
the mechanical stress to prevent failure.
TEMPERATURE °C
TEMPERATURE °C
Natural
cooling
Preheating
260
245
150
Soldering
Natural
cooling
Time(sec.)
Figure 1. Re-flow Soldering
Over 2min.
Gradual
Cooling
Within 3s
Preheating
Soldering
3s
(max.)
10s
(max.)
TEMPERATURE °C
Natural
cooling
Figure 2. Wave Soldering
350
330
150
Over 1min.
Gradual
Cooling
Figure 3. Hand Soldering
NOTE : Specifications subject to change without notice. Please check our website for latest information.
07.08.2008
SUPERWORLD ELECTRONICS (S) PTE LTD
PG. 6
SUPERWORLD [ SUPERWORLD ELECTRONICS ]
