🚀 go-pugleaf

In article <673@gorn.santa-cruz.ca.us> logo@gorn.santa-cruz.ca.us (David Kiviat) writes:
}
}Hi! This discussion reminds me of a question I have had for many years
}since I worked in a final test department of a large chipmaker. The company
}decided they wanted to replace gold as the substrate (or was it the preform-
}I forget-it's been a long time) with silver. They put a lot of research into
}it and seemed to pull it off. The only problem I remember was that we had
}to centrifuge all those chips and a fairly high percentage of them went
}kabloey in the process. At the time we were told that despite the higher
}losses the cost savings made the change worthwhile.
} 
}My question is did this catch on in the industry or is using silver instead of
}gold to hold the die in place now a rare thing?

The usual die attach these days is conductive epoxy.  This works well
unless you intend to run lots of substrate current.
-- 

Norm   (strong@tc.fluke.com)