• Conformal coating or potting results in loss of warranty.
• The RF shield will not protect the part from low-viscosity coatings and potting. An
undefined amount of coating and potting will enter inside the shielding.
• Conformal coating and potting will influence the parts of the radio front end and con-
sequently influence the radio performance.
• Potting will influence the temperature behaviour of the device. This might be critical for
components with high power.
9.2.4 Other notations
• Do not attempt to improve the grounding by forming metal strips directly to the EMI
covers or soldering on ground cables, as it may damage the part and will void the
warranty.
• Always solder every pad to the host PCB even if some are unused, to improve the
mechanical strength of the module.
• The part is sensitive to ultrasonic waves, as such do not use ultrasonic cleaning, weld-
ing or other processing. Any ultrasonic processing will void the warranty.
9.3 ESD handling
This product is highly sensitive to electrostatic discharge (ESD). As such, always use prop-
er ESD precautions when handling. Make sure to handle the part properly throughout all
stages of production, including on the host PCB where the module is installed. For ESD
ratings, refer to the module series’ maximum ESD section. For more information, refer to
the relevant chapter
. Failing to follow the aforementioned recommendations can result in
severe damage to the part.
• the first contact point when handling the PCB is always between the local GND and
the host PCB GND, unless there is a galvanic coupling between the local GND (for
example work table) and the host PCB GND.
• Before assembling an antenna patch, connect the grounds.
• While handling the RF pin, avoid contact with any charged capacitors and be careful
when contacting any materials that can develop charges (for example coaxial cable
with around 50-80 pF/m, patch antenna with around 10 pF, soldering iron etc.)
• Do not touch any exposed area of the antenna to avoid electrostatic discharge. Do not
let the antenna area be touched in a non ESD-safe manner.
• When soldering, use an ESD-safe soldering iron.
9.4 Safety recommendations
It is your duty to ensure that the product is allowed to be used in the destination country
and within the required environment. Usage of the product can be dangerous and must be
tested and verified by the end user. Be especially careful of:
Ophelia-I reference manual version 1.0
© January 2022
www.we-online.com/wireless-connectivity
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