> On 5/24/2016 12:15 PM, Eric Smith wrote: >> On Tue, May 24, 2016 at 1:08 PM, Chuck Guzis <[email protected]> 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.
