Patent ID: 6882030
Filing Date: 2005-04-19
Classification: H01L

Abstract:
1. A body comprising a semiconductor substrate which has a top surface and a bottom surface, wherein one or more through holes pass through the substrate between the top and bottom surfaces, the body comprising one or more circuit elements formed in and/or over the top surface of the semiconductor substrate; a conductor formed in each through hole and protruding from the bottom surface of the semiconductor substrate, the conductor in each through hole being coupled to one or more of the circuit elements; a dielectric separating the conductor in each through hole from the semiconductor substrate, wherein at each through hole the dielectric forms a protrusion on the bottom of the body around the conductor; wherein at each through hole the conductor protrudes from the dielectric on the bottom of the body, the conductor thus having a protruding outer surface not covered by the dielectric, wherein at least a portion of the protruding outer surface is either vertical or sloped outwards, laterally away from the through hole, when the surface is traced down; wherein throughout each protrusion formed by the dielectric, the dielectric becomes gradually thinner around the adjacent conductor as the protrusion is traced down.