Patent ID: 6414509
Filing Date: 2002-07-02
Classification: G01R,H01L

Abstract:
A method of testing a semiconductor integrated circuit flip chip in-situ while said integrated circuit flip chip is positioned on a substrate, said integrated circuit flip chip including a first facing surface adapted for facing said substrate when said integrated circuit flip chip is positioned on said substrate and including a first plurality of contacts positioned thereon, selected ones of said contacts including a solder ball, said method comprising:providing a substrate having a second facing surface including a second plurality of contacts thereon, said second plurality of contacts comprising dendrites adapted for contacting respective ones of said solder balls of said first plurality of contacts on said first facing surface of said integrated circuit flip chip when said integrated circuit flip chip is positioned on said substrate; bringing selected ones of said solder balls into contact with respective ones of said dendrites of said second plurality of contacts on said second facing surface of said substrate; applying a compressive force to said integrated circuit flip chip and said substrate sufficient to cause said dendrites to penetrate through any oxide or corrosive films on said selected ones of said solder balls; passing test signal inputs to said integrated circuit flip chip while said integrated circuit flip chip is positioned on said substrate and said compressive force is applied thereto, and thereafter receiving test signal outputs from said integrated circuit flip chip; determining whether said test signals from said integrated circuit flip chip are correct or incorrect; and thereafter, bonding said integrated circuit flip chip solder balls to said contacts if said test signals from said integrated circuit flip chip are correct and removing said integrated circuit flip chip from said substrate if said test signals from said integrated circuit flip chip are incorrect.