Patent ID: 6046469
Filing Date: 2000-04-04
Classification: H01L

Abstract:
A semiconductor storage device, comprising:a capacitor section having a lower electrode, a dielectric film, and an upper electrode stacked in this order;a MOS transistor having a source region, a drain region, and a gate electrode;a polysilicon plug for electrically connecting the capacitor section with the drain region of the MOS transistor; anda barrier metal formed between the lower electrode of the capacitor section and the plug,wherein the barrier metal is formed of either TiN or Ta.sub.x Si.sub.1-x N.sub.y (1>x>0.2, 1.gtoreq.y>0), andwherein the lower electrode of the capacitor section has a plurality of films including a platinum-rhodium alloy oxide film which is formed in contact with the dielectric film.