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I just had a thought: Why do microprocessors have gold contacts instead of silver?

post #1 of 22
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Seriously, I don't get it. Sure, silver corrodes, but given the fact that the silver will only be exposed to air for an extremely short time, and will then be kept virtually forever in a semi-anoxic environment, I don't get why microprocessor manufacturers aren't using the most electrically conductive metal available.

Thoughts?
    
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post #2 of 22
gold conduct better. that why high end audio stuff is all gold.
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post #3 of 22
Quote:
Originally Posted by lilraver018 View Post
gold conduct better. that why high end audio stuff is all gold.
It actually doesn't, silver, and copper are better conductors. But it doesn't form any oxides or sulfides. Even the tiniest bit of oxidation is enough to mess up a processor.
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post #4 of 22
Silver corrodes, true, and the contacts are actually only being contacted by a small pin on the pads at any given moment. So leaving it for an extended amount of time would cause all the areas on the pad except for the small tiny pin prick pin contact point to become corroded. Even a slight movement or even reinserting the CPU could move it over enough to make the contact poor.
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post #5 of 22
Quote:
Originally Posted by lilraver018 View Post
gold conduct better. that why high end audio stuff is all gold.
Silver is the most conductive metal out there.
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post #6 of 22
Quote:
Originally Posted by axizor View Post
Silver is the most conductive metal out there.
*add this to your sentence*
"but silver is corrosive that is why they use gold"
post #7 of 22
I see it as a precaution to corrosion. CPU contacts (and others, for that matter) need the most reliable signal.
 
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post #8 of 22
Why take the risk of corrosion with silver or bare copper? Just use gold so there is little chance of corrosion.
post #9 of 22
leave it the over qualified engineers at the mfr companies.
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post #10 of 22
Because this guy is making them

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