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Qwerty
Joined: 20 May 2005
Posts: 3141
Location: Germany
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 Posted: Fri Sep 29, 2006 2:16 pm Post subject: Golden chip |
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Hi !
I have found this unusual and very beautiful chip.
Both top and bottom of it are covered by gold. It's possible to see white ceramic from a side.
What is it and why is it covered by gold? |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Sep 29, 2006 4:46 pm Post subject: |
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741 op-amp. Here's a similar package from National:
That's glass in between, not a ceramic.
- CMW |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Sep 29, 2006 5:15 pm Post subject: |
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There are a couple other examples from AMD and TI in this thread:
http://www.cpu-world.com/forum/viewtopic.php?t=2860&start=15
According to one of my early National data books, they're called cavity DIP packages. You won't find many made after about 1972, no doubt because they use an awful lot of gold compared to a cerDIP.
- CMW |
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viewgsm
Joined: 17 Sep 2006
Posts: 80
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| Posted: Sat Sep 30, 2006 1:21 am Post subject: here is one more |
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here is one more  [/quote] |
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