Patent ID: 6355521
Filing Date: 2002-03-12
Classification: H01L

Abstract:
A method of manufacturing a capacitor in a semiconductor device, comprising the steps of:providing a semiconductor substrate in which a contact plug having a recess is formed; forming a contact film and a diffusion prevention film within the recess of the contact plug, said diffusion prevention film being formed by depositing TiSiN by means of a chemical vapor deposition method; forming a sacrificial oxide film in which a hole pattern through the diffusion prevention film is formed; forming an oxide-resistant conductive layer on the entire structure including the sacrificial oxide film in which the hole pattern is formed; remaining the oxide resistant conductive layer in the hole pattern and removing the sacrificial oxide film, thereby forming an underlying electrode of a cylindrical structure; forming a Ta2O5 dielectric film on the underlying electrode; and forming an upper electrode on the dielectric film.