Patent ID: 8637365

Claim:
A method comprising: recessing a node dielectric, a first conductive layer, and a second conductive layer each deposited within a deep trench formed in a silicon-on-insulator (SOI) substrate, wherein the node dielectric, the first conductive layer, and the second conductive layer are recessed to a level below a buried oxide layer of the SOI substrate and creating an opening having a bottom surface in the deep trench; depositing a spacer along a sidewall of the deep trench and the bottom surface of the opening; removing the spacer from the bottom surface of the opening; performing at least one of an ion implantation and an ion bombardment in multiple directions at an angle into an upper portion of the spacer, the upper portion extending from a top of the deep trench to a location between a top surface and a bottom surface of the buried oxide layer; removing the upper portion of the spacer from the sidewall of the deep trench; and depositing a third conductive layer within the opening.