Patent ID: 6613672
Filing Date: 2003-09-02
Classification: H01L

Abstract:
A deep trench capacitor structure formed in a semiconductor substrate, the structure comprising:a substrate including a top surface, and a trench formed therein, said trench having sidewalls and a bottom surface, said substrate also having a doped region enveloping a lower portion of said trench; a conducting structure disposed within said trench and including conductive means forming a plurality of walls disposed at a depth below the top surface of said substrate, some of said walls facing said sidewalls of said trench, and some of said walls facing each other, said conductive means being affixed to said bottom surface of said trench and electrically connected with said doped region of said substrate, said doped region and said conducting structure forming a first plate of the capacitor structure; a dielectric layer formed over the surfaces of said sidewalls and the surfaces of the walls of said conducting structure; and a conducting plug formed over said dielectric layer and having portions extending between said walls and between said walls facing said sidewalls, said conducting plug forming a second plate of the capacitor structure.