--- In
Homebrew_PCBs@yahoogroups.com, Trevor White <trevor.white100@...> wrote:
>
> Hi all.
>
> I have been looking into making 4 layer boards. I have most stages
> sorted but the big stumbling block is the bonding of the layers
> together. It seems a special press is required that has enough pressure,
> exhausts the gases away and generates the correct temperatures. I am
> surprised its so difficult. I have been told second hand presses cost
> £4000 to £5000. This is totally out of budget for me. Has anyone any
> experience/thoughts/comments on bonding boards together?
>
> Thanks
>
> Trev
>
I've only done it once and I glued 2 double sided boards with epoxy, but added a sheet of fine fibreglass tissue between them also
worked, but was fiddly
alignment was assured by drilling outer holes, soldering a component lead in and snipping off (leaving about 0.5mm protruding)
glued up between 2 steel blocks in the vice