Patent ID: 6853025

Claim:
An integrated circuit (IC) having a trench capacitor comprising: a trench formed in a substrate having upper and lower portions, the trench capacitor located on the lower portion of the trench, the lower portion separated into top and bottom sections; a storage plate of the capacitor located in the lower portion of the trench; a dielectric layer in the bottom section of the trench separating the storage plate and the substrate; a dielectric collar lining sidewall of the top section of the lower portion of the trench, wherein a top surface of the capacitor is substantially planar and is formed by top surfaces of the dielectric collar and top surface of the storage plate; an etch stop layer covering the top surface of the dielectric collar and the storage plate; and a strap covering the etch stop layer such that the strap covers at least a portion of the top surface of the capacitor.