Although I have not yet attempted it, my expectation is that it will work the
same way bonding a 2 layer board out two singled PCBs works. Tape them together
at first, but once several via are soldered into place the board will be stuck
together well enough for many purposes.

With a 4 layer assembly the trick to access the inner layers is apparently to
drill the outer via holes larger than the inner holes so that it is possible to
solder the via connecting wire to both the inner and outer via copper plates.

That extra drill for the outer layers may be more of a pain than its worth with
through hole components. However, using SMD I'm hopeful the process will wind up
reducing my overall drill count and increase my component density.

Regards,
Royce


--- In Homebrew_PCBs@yahoogroups.com, Trevor White <trevor.white100@...> wrote:
>
> How do you bond a 4 layer board together?
>
> On Fri, Nov 6, 2009 at 5:13 PM, DJ Delorie <dj@...> wrote:
>
> >
> >
> >
> > I've made 4 layer boards at home. Not as much fun, but it gets the
> > job done.
> >
> >
>
>
> [Non-text portions of this message have been removed]
>