LARA-R2 series - System Integration Manual
UBX-16010573 - R12
Handling and soldering
Page 134 of 157
3.3.5
Repeated reflow soldering
Only a single reflow soldering process is encouraged for boards with a LARA-R2 series module populated on it.
3.3.6
Wave soldering
Boards with combined through-hole technology (THT) components and surface-mount technology (SMT) devices
require wave soldering to solder the THT components. Wave soldering process is not recommended for the
LARA-R2 series LGA modules.
3.3.7
Hand soldering
Hand soldering is not recommended.
3.3.8
Rework
Rework is not recommended.
Never attempt a rework on the module itself, e.g. replacing individual components. Such actions
immediately terminate the warranty.
3.3.9
Conformal coating
Certain applications employ a conformal coating of the PCB using HumiSeal
®
or other related coating products.
These materials affect the RF properties of the LARA-R2 series modules and it is important to prevent them from
flowing into the module.
The RF shields do not provide 100% protection for the module from coating liquids with low viscosity, and
therefore care is required in applying the coating.
Conformal coating of the module will void the warranty.
3.3.10
Casting
If casting is required, use viscose or another type of silicon pottant. The OEM is strongly advised to qualify such
processes in combination with the LARA-R2 series modules before implementing this in production.
Casting will void the warranty.
3.3.11
Grounding metal covers
Attempts to improve grounding by soldering ground cables, wick or other forms of metal strips directly onto the
EMI covers is done at the customer's own risk. The numerous ground pins should be sufficient to provide optimum
immunity to interferences and noise.
u-blox gives no warranty for damages to the LARA-R2 series modules caused by soldering metal cables or
any other forms of metal strips directly onto the EMI covers.
3.3.12
Use of ultrasonic processes
LARA-R2 series modules contain components which are sensitive to ultrasonic waves. Use of any ultrasonic
processes (cleaning, welding etc.) may cause damage to the module.
u-blox gives no warranty against damages to the LARA-R2 series modules caused by any ultrasonic
processes.
