Patent ID: 6746878
Filing Date: 2004-06-08
Classification: H01L

Abstract:
A manufacturing method of a semiconductor device comprising the steps of:forming an insulating film over a semiconductor substrate; forming sequentially a first conductive film, a dielectric film, and a second conductive film over the insulating film; forming a first film made of one of metal and metal compound on the second conductive film; forming a second film made of insulating material on the first film; forming a hard mask by patterning the second film and the first film into a capacitor planar shape; forming a capacitor upper electrode by etching the second conductive film in a region that is not covered with the hard mask; forming a capacitor dielectric film by etching the dielectric film in the region that is not covered with the hard mask; etching the first conductive film in the region that is not covered with the hard mask up to a depth that does not expose the insulating film; removing the second film of the hard mask by etching; forming a capacitor lower electrode by etching a remaining portion of the first conductive film in the region, that is not covered with the hard mask, to the end; and removing the first film of the hard mask by the etching.