24 May
2016
24 May
'16
1:34 p.m.
On 5/24/2016 12:15 PM, Eric Smith wrote:
> On Tue, May 24, 2016 at 1:08 PM, Chuck Guzis <cclist at sydex.com> wrote:
>> Yes, but there was a trademarked name for the process that slips my
>> mind. Capable of very high densities.
>
> Multiwire?
On 2016-May-24, at 1:26 PM, jwsmobile wrote:
We bought a Multiwire job on our clone of the
Microdata 1600 and the tech it used, I think, was welded wires laid in muck that was
soft.
They would fab up a firm carrier board with all the thru-holes set, then put down a soft
pliable layer of epoxy(??). They would weld one of the wires to an appropriate thru-hole
then the wire would be pushed into the media and routed to the terminus. Similar to
wirewrap process from the routing requirements (keep number of connections to any post /
thruhole adhering to design rules). But when it was complete, you could see all the wires
thru the goo they used after it hardened or was set up.
The set we had worked well, but was about 3500 bucks for an approximately 8 x 10 board
with a 130pin edge card connector. Kinda pricy. However, if you had a working design, it
was overnight turnaround with a PC.
I haven't so much as seen a multi-wire board since ca. 1980, even in all the scrap and
junk and surplus I've seen in the decades since.
The primary example I recall from then was a big disk controller board for a TI-990/10.