Patent ID: 6313411
Filing Date: 2001-11-06
Classification: H01L,Y02P

Abstract:
A wafer contact sheet comprising:a dielectric layer having a plurality of upper surface located, recessed conductive vias; wherein said dielectric layer is formed from a porous compliant substrate containing a high temperature adhesive;a plurality of conductive pads disposed beneath said dielectric layer, each of said plurality of conductive pads contacting a respective conductive via;a selectively conductive layer disposed beneath said dielectric layer and extending in an x-axis direction, a y-axis direction, and a z-axis direction; said selectively conductive layer being adhesively attached to said dielectric layer;wherein said plurality of conductive pads is interposed between said dielectric layer and said selectively conductive layer; and, a plurality of uniformly configured conductive bumps are disposed on said selectively conductive layer, wherein said selectively conductive layer has irregularly configured conductive pathways, which are oriented in the z-axis direction, and which are electrically isolated from one another in the x and y-axis directions, and said conductive pathways are coupled to said plurality of conductive vias.