Patent ID: 7339204
Filing Date: 2008-03-04
Classification: H01L

Abstract:
1. A method of forming a backside contact, comprising: forming a plurality of contact regions within an active portion of a substrate while patterning a lower metallization level on a front side of the substrate, each contact region extending across a boundary between two integrated circuit die within the substrate; etching a plurality of contact openings in a back side of the substrate along the boundary, each contact opening exposing a portion of one of the contact regions on both sides of the boundary, each opening having four sidewalls that are substantially planar in a region from the back side to a bottom of the opening; and forming conductive lines on the sidewalls of each opening that are on opposite sides of the boundary, the conductive lines each electrically connecting an exposed portion of the contact on one side of the boundary to a backside contact pad on a backside surface of the substrate adjacent the opening on the same side of the boundary.