We think a good primer is this multi-layer PCB layout guide which [Rik te Winkel ... 2 is a blind via; it stops part way through the board. And #3 is a buried via; it connects internal layers ...

Take a look at a PCB some time, and you’ll quickly see a ... because [Joe Grand] is here to tell you how to deconstruct PCBs one layer at a time. Most of this work was originally presented ...