We hear all the time about how it was insanely expensive to have "full featured" PCBs made back in the day (say 80s or early 90s). I'm curious as to just how expensive it was.
Does anyone who worked back then remember just how much it actually cost to get a small prototype run of 2 layer/soldermask/slikscreen boards produced, and how long it took? In fact, any data points would be interesting, from single layer, up to multilayer with impedance control (did that even exist back then?)
Yes, I paid something like 300$/cdn for 3 double-sided boards about 4x5 inches each , about 1994, 1995? Although they did have a plating bar for hard gold edge connectors, and I asked for beveling of the edge.
Oh yeah, sending files consisted of z-modeming them to their BBS. It was local to Montreal. They're no longer around.
If you're interested, you can see how they used to do it in the 1960s, when Tektronix was making GHz sampling scopes with PCBs in them.
http://www.vintagetek.org/tektronix-printed-circuit-boards-1969/I don't know what you mean by "did that exist back then". Did what exist? The notion of impedance? Impedance control? Multi layer boards?
All that existed in the 1960s, but certainly only for military or high grade industrial stuff. I have musty books from the 60s with multi-layer backplanes and the first auto-routers described, as well as the rules of thumb and empirical formulas for figuring out trace widths to achieve an impedance.
I also remember we etched boards at school, that's how I made my lab power supply. It was modest, but we used a program called smARTWORK. It was a fast way of drawing pads and lines on a grid, no netlist or fancy stuff like that!
http://vetusware.com/download/smARTWORK%201.3%20r4/?id=7878We got that onto PCBs, probably by UV, and etched in persulphate and drilled them. This was early '90s.