This is possibly question many times answered, but with my searching skills I didn't find a straight answer yet: what type of
trough hole and
blind vias are allowed on 4-layer design?
I'm going to make my first 4-layer PCB, and came into position for the first time to think about it and immediately stuck. Here is what I presume that is possible, or better to say, a proper usage of multiple layers:
Top (1) and bottom (16) layers should be used for signaling, upper middle layer (2) is GND, and lower middle layer (15) is for power. All SMT parts will be on the top layer therefore for the signal trace connecting between 1 and 16, trough hole via should go from top to bottom. But, for GND and power, I'd like to have 1-2 and 1-15 type of blind vias. In summary it should looks like this:
I've checked design rules file from few PCB manufactures, and nobody offer such "freedom". In most case I can see that trough hole via (1-16) is allowed.