MOTM

>
> Not that I would want to do any of this myself, but one of the folks I worked with
> (whom I found out worked with Paul eons ago, stealing all of their computer sim time
> for antenna simulations) completed a 44 layer backplane.  The board is .3" thick and
> 19" by 30" or so.  The connectors aren't even soldered in, they are just "press fit"
> but with ~1K pins each, they have enough surface to hold them in place just fine.

Did one of these for Fujitsu Telecom about 6 years ago. Those press-fit connectors were a BITCH!
All metric and such. Mine was an Enternet-based backplane, only 18 layers, about 9 x 24 inches. I
charged them $1200ea for the blank pc boards.

The nastiest pcb I ever did was when my pcb tools were in DOS on a 486. I did a 6 layer PC AT
card for a SDLC network. I was running 3 traces in-between IC pads. I worked like 6 18-hours days
in a row, over Thanksgiving.

Paul S.