I'm not sure I'm going to explain this very well but here goes....
I have a board in which I have bypass caps filtering the supply to an op amp. The "V-" of the op amp supply is GND and GND is a plane on an internal layer. However rather than just using a via to connect the low side of the bypass caps to the GND plane I'd like to force a routing to the via which connects the op amp V- pin to the GND plane. This would be straightforward except I need another via to make the routing on the top rather than bottom layer (where the op amp is sitting) and as soon as I place the via to get to the top layer it connects to the GND plane. How can I isolate this via from GND?
Thanks in advance
Steve
Btw I can only use vias that go through the entire board
