Patent ID: 6790741
Filing Date: 2004-09-14
Classification: H01L

Abstract:
A process for producing a semiconductor device comprising an array of a plurality of capacitor elements which are each a laminate of a lower electrode, a metal oxide dielectric film of a perovskite type crystal represented by ABO3, and an upper electrode in this order on a semiconductor substrate; the process comprising steps of:forming the lower electrodes and a crystallization-assisting conductive film on an insulating film; said films being independently made, wherein the crystallization-assisting conductive film is made of a material capable of catalyzing formation of active precursors of the metal oxide dielectric film in the formation of the metal oxide dielectric film; the crystallization-assisting conductive film being formed outside the capacitor array area at a distance not larger than the diffusion distance of active precursor from the outermost lower electrodes of the array, in a width of 20 &mgr;m or more and at least equal to the width enabling formation of the crystal nuclei of the metal oxide dielectric film; and forming the metal oxide dielectric film on the formed lower electrodes and the formed crystallization-assisting conductive film.