Salt sprays, moisture, fungi, corrosion and other forms associated with contamination due to wet or even harsh environments can destruction printed circuit boards (PCBs). To prevent damage in addition to avert costs incurred simply by replacement or repair, non-conductive conformal coating is put on PCBs during the set up process.
Conformal coating is usually commonly applied to PCBs applied in consumer electronics, devices and mobile phone goods which may be exposed to moist, humid, dusty or some other harsh environments.
How will conformal coating protect PCBs?
The conformal coating method inserts a layer associated with protection between the PCB board-level parts and typically the outside environment. This level of protection functions like a one of the ways street: that permits moisture contained beneath the layer to be journey across the conformal layer layer, but does not really allow contaminants in the particular ambient environment to transit across the conformal covering to the board-level elements.
Does conformal coating have got any other benefits?
Yes. Since conformal coating is usually made from lightweight material, it allows the PCB to maintain a small footprint. In addition, conformal coating supplies a support connection between the conductors thereby increasing overall strength. Conformal coating not only shields a PCB to guarantee reliability, its layer of protection expands the working life of the board which usually will keep your costs low.
Are there diverse kinds of conformal covering?
Yes. The most typical forms of conformal coating are usually silicone, acrylic, urethane and Paraxlylene. The choice of a specific type depend upon which level of protection necessary. The ultimate choice is based on the chemical plus physical properties of typically the coating material.
How will be conformal coating applied to be able to PCBs?
There are several primary processes by which usually conformal coating is utilized to PCBs: dipping, picky robot coating, spraying and brushing. All these alternatives attain the same goal: in order to completely cover the PCB including sharp edges and everything board contours.
After typically the conformal coating is utilized to a PCB, the particular coating must be cured. Typically the curing process can end up being accomplished via air drying, thermally via an oven, or perhaps by UV light.
To conclude, there are six essential procedure for apply conformal coating. These are:
Clean the PCB board.
Remove all terminal pins and connectors.
Pick a type of conformal coating and apply that for the board.
Select a new curing type and cure the board.
Put re-install parts back onto the board.
Test the panel to ensure it functions normally.