Say there is a part, 48 pin with 4 multiple Vdd's and I want to place a
.1uf bypass near each VDD pad.
I place the cap there near the right pad, tweak the placement a little, then
run ratsnest and finally actually have the connection running to each cap
directly from the pad.
I run the autoroute, when complete, the direct route from cap to pad to
lost. That means the last resort of manually routing the caps first, then
autorouting. Problem here is the optimize sometimes rips up my previous
manual route. Not to mention, often there are other tweaks to the board
after I route it, and then would have to come back and manually route the
caps a number of times before finally committing.
If anyone can relate to what I am going through, please let me know if there
is a solution to this. Ideally, feature to "lock" in place existing routed
traces would be the perfect solution.