Patent ID: 7365020

Claim:
A method for manufacturing a capacitor in a semiconductor device, comprising the steps of: forming in a sequence a lower metal film, a lower nitride film, an upper metal film, and an upper nitride film on a substrate having a predetermined device formed thereon; to form a stacked layer structure forming a pattern over a portion of the stacked layer structure; etching the upper nitride film with CHF 3 , Ar and N 2 using the pattern as a mask; over etching the upper metal film more than 50% with CHF 3 , Ar and N 2 using the pattern as the mask; etching a remaining portion of the upper metal film with CHF 3 , Ar and Cl 2 using the pattern as a mask; and etching the lower nitride film with CHF 3 and Ar using the pattern.