Reminds me of Multiwire. Probably has the same plating reliability problems. And rework looks impossible.
We'll stick with tin-lead solder.
John
Indiana Skunkworks Wants to Eliminate Solder
Oct 28, 2008
4 Replies
Indiana Skunkworks Wants to Eliminate Solder
Defense electronics' 20-year reliability requirements rule out the use of lead-free solder. Tin whiskers, copper dissolution from printed circuit pads, copper migration into lead-free solder, voids, and poor wetting are just some items on the list of lead-free hazards that result in shorted or open circuits, even without the help of vibration or shock.
To read this article, go to
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Because we'll come unstuck without it?
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
Wire wrap?
Interesting responses. Blind vias are extremely relable. So I'm told by Mike Carano of OMGI and many others. Think how easily the escape problem is solved by uniform, short, low self-inductance blind vias, eliminating crosstalk and 3-D congestion...
Separating the trace substrate from the component substrate might be done in many ways-- how about a sheet of anodized aluminum for the components?
Harvey
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