Patent ID: 6239462
Filing Date: 2001-05-29
Classification: H01L

Abstract:
A semiconductor device comprising:a substrate;a capacitor device, which is formed on the substrate and includes a capacitive lower electrode, a capacitive insulating film made of an insulating metal oxide film and a capacitive upper electrode;an interlevel insulating film, which is formed over the capacitor device and has an opening reaching the capacitive upper electrode;a metal interconnection, which is formed on the interlevel insulating film so as to be electrically connected to the capacitive upper electrode through the opening and includes a titanium film; andan anti-diffusion film, which is formed between the capacitive upper electrode and the metal interconnection, said anti-diffusion film being conductive and operative for preventing titanium atoms from passing through the capacitive upper electrode and diffusing into the capacitive insulating film.