On 7 Jun 2011, at 14:02, Chris Kleeschulte wrote:
> 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.
I was thinking of having a go at this. Assuming I could do both boards (for double sided) with the same accuracy, I intended to etch both then drill one. The second layer could have two or three holes carefully drilled and widely spaced. Then I would pin the two boards together through the matching holes in both. After that it should just be a case of drilling again through the existing holes in the first board.
If the dimensions are god and the alignment holes really are, all the others should be perfectly lined up.
To glue them together, I figured contact adhesive would do. Epoxy would squeeze up through the holes meaning they would need re-drilling again.