Classic power!

From: Marvin <marvin_at_rain.org>
Date: Mon Oct 4 19:01:40 1999

Dave McGuire wrote:

> >The PC boards that make up the backprojector make use of a unique
> >technology: the PC boards themselves are just plain old two-layer boards,
> >with the actual PC traces carrying only power and ground. All the actual
> >wiring is done by fine machine-laid wiring between pads, with all
> >the wire layers "potted" in a plastic compound. Obviously, reworking
> >such a PC board is extremely difficult, but it gives impressive component
> >densities for the time. The modern equivalent of this is multi-layer
> >PC boards, naturally.
>
> I've seen a lot of those boards. They weren't a predecessor of multi-layer
> PCBs per se. Some company (I've long since forgotten their name) sold the
> system that created those boards...it was an in-house system so that you could

PhotoCircuits on Long Island was IIRC involved with it at one time. I don't
recall if they were a part of Kollmorgen (sp???) at the time or not, but I
saw the Multiwire machines working, and they were rather interesting to
watch!
Received on Mon Oct 04 1999 - 19:01:40 BST