Patent ID: 7087948
Filing Date: 2006-08-08
Classification: H01L

Abstract:
1. An electronic structure comprising a substrate; an array capacitor within the substrate; and a support capacitor within the substrate, wherein the array capacitor comprises a first trench filled with a first conductive material such that the first trench is oriented perpendicular to a top surface of the substrate, a first buried plate surrounding a bottom portion of the first trench, and a thin node dielectric layer surrounding the first conductive material such that a first portion of the thin node dielectric layer is disposed between the first conductive material and the first buried plate and is in direct mechanical contact with both the first conductive material and the first buried plate and such that a second portion of the thin node dielectric layer disposed between the first buried plate and the top surface of the substrate and is in direct mechanical contact with the first conductive material, wherein the support capacitor comprises a second trench filled with a second conductive material such that the second trench is oriented perpendicular to the top surface of the substrate, a second buried plate surrounding a bottom portion of the second trench, and a thick node dielectric layer surrounding the second conductive material such that a first portion of the thick node dielectric layer is disposed between the second conductive material and the second buried plate and is in direct mechanical contact with both the second conductive material and the second buried plate and such that a second portion of the thick node dielectric layer is disposed between the second buried plate and the top surface of the substrate and is in direct mechanical contact with the second conductive material, and wherein a thickness of the thick node dielectric layer exceeds a thickness of the thin node dielectric layer.