Patent ID: 7071056

Claim:
A method of forming a capacitor comprising: forming a hemispherical grained polysilicon layer over a substrate; subjecting said hemispherical grained polysilicon layer to a cleaning solution to remove impurities from said hemispherical grained polysilicon layer and to obtain a cleaned hemispherical grained polysilicon layer; forming a native oxide layer over said cleaned hemispherical grained polysilicon layer, said native oxide layer being formed to a thickness of about 5 Angstroms to about 50 Angstroms; forming an amorphous silicon layer over said native oxide layer; subjecting said amorphous silicon layer to a seeding treatment; forming a dielectric layer over at least a portion of an outer side of said cleaned hemispherical grained polysilicon layer and said amorphous silicon layer; and forming a conductive layer over said dielectric layer.