Patent ID: 7351640

Claim:
A method of forming a semiconductor device, comprising: forming a dual-sided bottom electrode layer by using a smooth polysilicon over interior surfaces of a container formed in a substrate; removing any smooth polysilicon layer formed over the substrate and around the container opening to expose the upper surface of the substrate; removing the substrate to expose a portion of outside surface of the formed smooth polysilicon layer to form the dual-sided smooth polysilicon container; depositing a barrier layer over the dual-sided smooth polysilicon layer such that the barrier layer fills the container and around the container; removing the barrier layer to form a recess such that the recess exposes a top portion of the formed dual-sided smooth polysilicon layer; nitridizing the exposed top portion of the dual-sided smooth polysilicon layer; removing the remaining barrier layer to expose the polysilicon layer of the dual-sided bottom electrode; and forming a HSG polysilicon layer over the interior surfaces of the smooth polysilicon layer within the container.