Patent ID: 6388305
Filing Date: 2002-05-14
Classification: H01L

Abstract:
A one time, voltage programmable logic element in a semiconductor substrate of first conductivity type comprising:a first layer beneath a surface of the substrate, the first layer having a second conductivity type; a trench formed through the surface and passing through the first layer, the trench comprising: an interior surface; a dielectric material lining the interior surface of the trench; and a conductive material filling the lined trench; a second layer beneath the surface of the substrate, coupled to the first layer and surrounding the trench, the second layer having the second conductivity type; and a surface contact structure within the substrate coupled to the conductive material within the trench so as to provide electrical contact thereto, wherein the logic element is configured so that a predetermined voltage or higher applied between the conductive material and the first layer causes a breakdown within a region of the trench.