Patent ID: 8129772

Claim:
A capacitor comprising: a semiconductor layer having a top surface; a shallow trench isolation structure in said semiconductor layer at said top surface, said shallow trench isolation structure having a first side essentially level with said top surface and a second side opposite said first side; a silicon germanium film above said shallow trench isolation structure immediately adjacent to said first side; a deep trench structure below said shallow trench isolation structure immediately adjacent to said second side and comprising: a deep trench having sidewalls and a bottom surface, said deep trench further having a narrower width than said shallow trench isolation structure such that end portions of said shallow trench isolation structure extend laterally beyond said sidewalls; a dielectric liner lining said sidewalls and said bottom surface; and a first fill material adjacent to said dielectric liner and filling said deep trench, said first fill material comprising one of a semiconductive material and a conductive material, and a channel extending vertically through a center portion of said shallow trench isolation structure from said silicon germanium film at said first side to said first fill material at said second side and comprising a second fill material that electrically connects said silicon germanium film to said first fill material.