Patent ID: 6818501
Filing Date: 2004-11-16
Classification: H01L

Abstract:
A process of forming a container cell, comprising:forming a trench in a semiconductor substrate, said semiconductor substrate having an upper surface; forming an isolation film within said trench; forming a gate oxide on the upper surface of said semiconductor substrate such that the gate oxide extends below the upper surface of said semiconductor substrate; forming a first gate stack upon said semiconductor substrate and having an edge aligned with and adjacent to an edge of said trench; forming a second gate stack upon said isolation film within said trench; etching a container cell into said isolation film within said trench, said container cell being situated substantially between said first and second gate stacks and having an edge defined by said semiconductor substrate and said isolation film, said edge of said container cell substantially extending to and terminating at each of said first and second gate stacks; forming a storage node within said container cell; forming a cell dielectric over said storage node; forming a cell plate over said cell dielectric; and forming an insulating layer over said cell plate and within said container cell.