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Patterned contact

  • US 7,989,958 B2
  • Filed: 01/10/2006
  • Issued: 08/02/2011
  • Est. Priority Date: 06/14/2005
  • Status: Active Grant
First Claim
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1. A chip comprising a first chip with a first electrical contact, wherein the first electrical contact comprises at least two layers, wherein one of the at least two layers comprises one of a first metal or a first alloy and another one of the at least two layers comprises one of a second metal or a second alloy different from the first metal or the first alloy, wherein the first electrical contact has a proximal end and a distal end with respect to the first chip, wherein the distal end has a shape projected in a plane parallel to the first chip, wherein the projected shape is configured to facilitate penetration into a second electrical contact of a second chip and a mechanical and electrical connection between the first electrical contact and the second electrical contact of the second chip when the first and second electrical contacts are joined at a temperature below a melting point of the second electrical contact, and wherein at least a portion of the second electrical contact is malleable and is configured to deform when the first and second electrical contacts are joined at the temperature below a melting point of the malleable portion.

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