Patent ID: 7198960
Filing Date: 2007-04-03
Classification: H01L

Abstract:
1. A method for fabricating a ferroelectric capacitor comprising the steps of: forming a first conductive film, a ferroelectric film, and a second conductive film sequentially on a base film; and patterning the second conductive film, by etching the second conductive film using a plurality of masks different from each other, to be shaped into a rectangular planar shape of a top electrode having a first pair of parallel sides with a first designed length in a first direction and a second pair of parallel sides with a second designed length in a second direction perpendicular to the first direction, wherein a first mask of the different masks, in plan view, has a first masking shape to etch the second conductive film in the first direction along the first pair of parallel sides of the rectangular planar shape and includes a first portion covering a region of the second conductive film to form the top electrode, and a second mask of the different masks, in plan view, has a second masking shape to etch the second conductive film in the second direction along the second pair of parallel sides of the rectangular shape and includes a second portion covering the region of the second conductive film to form the top electrode.