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Why Gold Plating is Done in Mobile SIM cards?

  1. Aug 5, 2012 #1
    Mobile SIMcards are coated with Gold, why we cant use other metals or Alloys for conductivity.
     
  2. jcsd
  3. Aug 5, 2012 #2

    Danger

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    Gold Member

    I don't know for sure. My first instinct is that it's because gold can't corrode.
    Also, it's conductivity is very high.
     
  4. Aug 5, 2012 #3

    turbo

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    Silver is very conductive, but it oxidizes. Gold is more expensive, but you need very little of it when you're plating electronic contacts.
     
  5. Aug 6, 2012 #4
    We can and do use other coatings. Palladium for instance is quite popular. It's just an issue of required properties (chemical, electric) vs price.
     
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