DJ Delorie has made a 4-layer board this way. Search on his name on this site -- or maybe he'll chime in.
--- In Homebrew_PCBs@yahoogroups.com, Chris Kleeschulte <laconia@...> wrote:
>
> I have been using the "thinner" .032 PCB blanks for a while now and I have a
> love/hate relationship with them.
>
>
> pros:
>
> ∗ easier to run through my H220 TIA laminator
> ∗ easy to cut (this is key)
> ∗ easier to drill for through-hole boards and mounts
> ∗ lighter
>
> cons:
>
> ∗ a bit flimsy
> ∗ can torque and possibly break the boards with little effort
>
>
> Question to the group:
>
> Is it feasible to use 2 one sided .032 boards and glue them together? Or
> even created some sort of 4 sided PCB using glued .032 boards? For the
> 4-sided boards the vias would need to be plated, but had anyone attempted
> this?
>
> This would double the amount of holes you would need to drill out, but I try
> to stay in the SMD world nowadays.
>
>
> The challenge, it seems to me, would be the alignment of the via and part
> holes.
>
> Currently, I hold the board up to the desk light for alignment, but this
> would not work if you had 2 pcbs. Maybe I could cut both pcbs about the same
> size with my paper cutter (close to the exact same size, but it wouldn't be
> perfect), then make each board, centering the pcb image as close as I can.
> Then, drill the pcbs, and then apply glue and simply line up the holes using
> the desk lamp. Then carefully sand down the edges until the entire edge is
> flush.
>
> Am I crazy or is this possible?
>
> It seems to me that we all would prefer to work with thinner boards, but a
> have thicker board as a finished product?
>
>
> thanks!
> Chris
>
>
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>