Patent ID: 7052957
Filing Date: 2006-05-30
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, comprising: forming a barrier layer over interior surfaces of a container formed in a substrate; forming a bottom electrode layer over the formed barrier layer by using a hemispherical silicon grain (HSG); removing any HSG polysilicon and barrier layers 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 barrier layer; nitridizing inside surface of the formed HSG polysilicon layer to form a nitridation layer; removing the exposed portion of the barrier layer to expose the formed HSG layer; pre-cleaning the nitridation layer and the outside surface of the HSG polysilicon layer; depositing a layer of cell nitride over the nitridation layer and the outside HSG polysilicon layer; and forming a top electrode over the deposited cell nitride layer.