Patent ID: 6682984
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A method of making a capacitor comprising:forming at least two gate stacks on a semiconductor substrate; forming an insulation layer over said two gate stacks; anisotropically etching at least partially through said insulation layer to form a storage container cell precursor situated between said two gate stacks; isotropically etching said storage container cell precursor to form a concave shaped storage container cell; forming a storage node within said concave shaped storage container cell, the storage node substantially conforming to the shape of the concave shaped storage container cell; forming a storage cell dielectric on said storage node, the storage cell dielectric substantially conforming to the shape of the storage node; and forming a cell plate layer on said storage cell dielectric, the cell plate layer substantially conforming to the shape of the storage cell dielectric such that an opening into the concave shaped storage container cell is maintained.