Patent ID: 8269265

Claim:
A capacitor, comprising: a buried doped layer doped with a first type of dopant; at least one trench defined in a semiconductor layer above the buried doped layer and extending at least partially into said buried doped layer, wherein said at least one trench comprises dielectric material deposited on the trench walls and a conductive fill material disposed within the trench and above the dielectric material at least one first doped region defined in the semiconductor layer and extending into said buried doped layer, said at least one first doped region being disposed adjacent said at least one trench in the semiconductor layer and doped with said first type of dopant; at least one second doped region disposed adjacent said at least one first doped region in the semiconductor layer and extending into said buried doped layer, said at least one second doped region being doped with a second type of dopant that is opposite to the first type of dopant; at least one first contact region contacting the conductive fill to define a first plate of the capacitor; and at least one second contact region contacting the first and second doped regions to define a second plate of the capacitor, the dielectric material defining a capacitor dielectric of the capacitor.