Patent ID: 6204089
Filing Date: 2001-03-20
Classification: H01L

Abstract:
A method for forming a flip chip package by cone-shaped solder bumps comprising the steps of:providing an integrated circuit (IC) chip equipped with a first plurality of bond pads on an active surface;building a first plurality of cone-shaped bumps on said first plurality of bond pads, wherein said first plurality of cone-shaped bumps does not have a spherically formed top surface;providing a substrate having a second plurality of conductive elements formed on a top surface;positioning an electrically insulating material layer having a thickness on said top surface of the substrate, wherein said electrically insulating material layer is not equipped with via holes;compressing said IC chip and said substrate together with said electrically insulating material layer thereinbetween at a temperature of at least 150.degree. C.; andpenetrating through the thickness of said electrically insulating material layer by said first plurality of cone-shaped bumps to establish electrical communication between said first plurality of bond pads and said second plurality of conductive elements.