Patent ID: 7629222

Claim:
A method of fabricating a semiconductor device, comprising: forming a first electrode; sequentially forming a first dielectric film, a conductive film for a second electrode, a second dielectric film, and a conductive film for a third electrode above the first electrode; forming a first pattern on the conductive film for a third electrode, the first pattern defining the second electrode; forming the second electrode by sequentially patterning the conductive film for the third electrode, the second dielectric film, and the conductive film for the second electrode, using the first pattern as an etching mask; partially removing the first pattern to form a second pattern that defines the third electrode; and forming the third electrode by patterning the conductive film for the third electrode, using the second pattern as a second etching mask, wherein: the third electrode has a width less than that of the second electrode, and forming the third electrode includes using an anisotropic etch to pattern the conductive film for the third electrode, the first electrode, the first dielectric film and the second electrode form a first capacitor, and the second electrode, the second dielectric film and the third electrode form a second capacitor.