I have a 14-layer SMT digital, polyimide, impedance controlled board per
IPC-D-275,Class3.
The coupon requires a section D. What really is the difference between
Option 1 and Option 2
and how does the conductor routing for all of the layers work out in this
section.
o--------------o o o o o o o o
/
/
o--- o o o o o o o
o--- o o o o o o o
\
\
o-------------o o o o o o o o
The above is my best attempt at drawing a Section D, that I think I need.
My question is
about the routing between these vias....."so that the interconnects in a
specific hole are
separated to the greatest extent possible." (IPC-D-275 page 82 7.3.7.2
Option 2 third para-
graph)
Thanks ahead of time,
DaveS