robertferanec , 05-16-2020, 12:31 AM
Please, what course do you mean? I can't find that specific section.
When SMT components are soldered, the whole PCB is heated up, so everything is hot (including planes) and it will solder ok. If you are soldering through hole pins, then, as @Paul van Avesaath suggested, using thermal relief may be considered (especially for GND)