Patent ID: 7550392
Filing Date: 2009-06-23
Classification: H01L,Y10S

Abstract:
1. A semiconductor device manufacturing method, comprising: forming an underlying insulating film on a semiconductor substrate; forming a first conductive film, a ferroelectric film, and a second conductive film in sequence on the underlying insulating film; forming a mask material film on the second conductive film; forming a resist pattern on the mask material film; shaping the mask material film into an auxiliary mask, by etching the mask material film while using the resist pattern as a mask; shaping the second conductive film into an upper electrode, by subjecting the second conductive film to an isotropic etching while using the auxiliary mask and the resist pattern as a mask; removing the resist pattern; removing the auxiliary mask; shaping the ferroelectric film into a capacitor dielectric film by patterning; and shaping the first conductive film into a lower electrode by patterning the first conductive film, whereby constructing a capacitor from the lower electrode, the capacitor dielectric film, and the upper electrode.