Patent ID: 6323084
Filing Date: 2001-11-27
Classification: H01L,Y10S

Abstract:
A method of manufacturing a semiconductor device capacitor comprising the steps of:a) forming contact hole in a lower structure formed on a principal surface of a semiconductor substrate;b) forming a storage electrode on the lower structure and burying the contact hole, wherein said storage electrode has a first impurity concentration at a bottom of the contact hole and a second impurity concentration at a top of said storage electrode, the second impurity concentration being less than the first impurity concentration;c) forming a Hemispherical Grain (HSG) layer on a second portion of the storage electrode having the second impurity concentration, but not on a first portion of the storage electrode having the first impurity concentration, so as to have a stabilized surface energy;d) forming a dielectric layer on the HSG layer; ande) forming a plate electrode on the dielectric layer.