Patent ID: 8350359

Claim:
A method of forming a chip having one or more through-silicon vias (TSV) in a substrate comprising: forming at least one aluminum annulus on said substrate; depositing an insulator layer superimposed on top of said at least one aluminum annulus and said substrate; etching at least one window through said substrate forming a deep trench having an upper diameter determined by an opening extending through a photoresist and through said insulator layer and a lower diameter determined by the diameter of said at least one aluminum annulus; forming an insulator sidewall in said deep trench and filling said deep trench with conductive material up to at least a top surface of said at least one aluminum annulus; and forming a capacitor having a first plate on a part of a conductive strap connected to said at least one aluminum annulus; a dielectric of said capacitor from a portion of an insulator; and a top plate of said capacitor made of conductive material.