Patent ID: 6426526
Filing Date: 2002-07-30
Classification: H01L

Abstract:
A connecting structure from a node conductor of trench capacitor device in a semiconductor substrate, said connecting structure comprising:a) an isolation region located above said node conductor, at least a portion of said isolation region having an exterior surface which is substantially conformal with at least a portion of an adjacent wall of a trench of said trench capacitor, b) a buried strap region in said trench above said node conductor, said buried strap region being bounded laterally by said isolation region except at an opening in said isolation region, said buried strap region being in electrically conductive contact with said semiconductor substrate at said opening and with said node conductor in said trench, said buried strap region also being recessed in said trench to provide sufficient space above said buried strap region in said trench for a gate conductor of a transistor, and c) a buried strap outdiffusion region in said substrate at said opening, said buried strap outdiffusion region being in electrically conductive contact with said buried strap region.