Patent ID: 6307228
Filing Date: 2001-10-23
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate having a first conductivity type region and a second conductivity type region, the second conductivity type being opposite to the first conductivity type;first and second insulated gate field effect transistors respectively having first and second insulated gate electrode structures formed in the first and second conductivity type regions of said semiconductor substrate and first and second pairs of impurity doped regions of the second and first conductivity types formed in said semiconductor substrate on both sides of said first and second insulated gate electrode structures;a first insulating film formed over said semiconductor substrate and covering said first and second insulated gate field effect transistors;at least two metal plugs formed through said first insulating film, having an upper surface exposed at an upper surface of the first insulating film and reaching at least one of the first and second pairs of impurity doped regions of said first and second insulated gate field effect transistors;a second insulating film having an oxygen blocking function and covering said first insulating film;a lower electrode formed on said second insulating film;a dielectric oxide film having a perovskite crystal structure and formed on said lower electrode;an upper electrode formed on said dielectric oxide film to form a capacitor together with said lower electrode and said dielectric oxide film;a third insulating film formed over said semiconductor substrate and covering the capacitor; anda local interconnect extending on said third insulating film and being connected via contact holes formed through said third insulating film between one of said metal plugs and said upper or lower electrode.