Components/landing areas designed for surface assembly —
the characteristics of the possibility to create flatness are important.
Landing areas designed for soldering,
the main criteria for choosing the finishing coating are the characteristics of solderability/compatibility with the coating of the components leads, and the type of solder as well.
The finishing coating is applied either to the landing areas or open areas of topology.
Topologies from mechanical action (edge connectors) —
it is necessary to take into account the friction coefficient, mechanical resistance and general wearing properties.
Depending on the required protective characteristics, the nuances of use and the type of basic material, various finishing coatings are applied to the printed circuit boards. For example, to protect: