Indium Blog

IBM Announces Shipment of Lead-Free C4 Joints

  • Indium Corporation
  • Lead Free Solder
  • RoHS
  • Solder
  • Solder Joints
  • Solderability
  • Soldering Products

  • Folks,

    IBM annoounced production of its totally lead-free "C4" (controlled collapse chip connection) solder joint, C4NP. This announcement strikes a blow to those that thought the RoHS exemption for "high lead" solder joints would last forever. Many thought that C4 technology could never go lead-free. C4 joints are used extensively in flip chip technology.


    Dr. Ron

    Note: Thanks to Dr. Dan Baldwin for the image!