I am a student and i am having problems with understanding a certain pcb design. You can find the pcb here: http://pdf1.alldatasheet.com/datasheet-pdf/view/449682/TI1/LMR62014.html
What i don't understand is if the pcb is just routed normally using
tracks and then there is a polygon placed on top to fill the board or if
the polygon(s) are used to connect components, also i do not understand
what the through holes are there for. Anything that could help me
understand this pcb is greatly appreciated. My goal is to reproduce this pcb, so anything that gets me going in that direction
(tutorials etc.) is greatly appreciated.