I just made some low-impedance boards for power supply regulators. Using a star ground on the bottom of the board, at the nucleus I punched a 0.031" hole. On the top side I poured a copper layer attached to no net. When the boards were finished I just connect the star ground nucleus to the top side layer. Since the layer on the top isn't connected to a net, component ground connections are only made through the star system, ergo elimination of ground loop conductance. Probably not good practice for RF, but it really works for very low impedance power supply regulators.
--- In Homebrew_PCBs@yahoogroups.com, "Terry" <twgray2007@...> wrote:
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> Generally speaking, the more ground plane -- top and bottom -- the better. The last step in most of my designs is to do a polygon fill tied to GND on both sides of the board.
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> --- In Homebrew_PCBs@yahoogroups.com, "Andrew" <a_wake@> wrote:
> >
> > I am closing in on designing a board that is a mix of SMD and through hole parts. I am using a zone on the bottom side to provide a ground plane; I wondered about adding a zone to the top as well. If I did a top zone, is there any reason I can't make it a ground plane as well?
> >
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