Patent ID: 7763545

Claim:
A manufacturing method of a semiconductor device comprising: forming an insulating film over a semiconductor substrate; forming a first conductive film over the insulating film; forming a dielectric film made of one of ferroelectric material and high-dielectric material on the first conductive film; forming a second conductive film on the dielectric film; forming a mask having a capacitor shape on the second conductive film; and etching the second conductive film, the dielectric film, and the first conductive film, which are exposed from the mask, sequentially to shape the second conductive film into a capacitor upper electrode and shape the first conductive film into a capacitor lower electrode; wherein at least the first conductive film is etched in a plasma atmosphere to which only hydrogen bromide and oxygen, in which a density of oxygen is set in equal or more than 80%, are supplied from a gas introducing pipe and a heating temperature of the semiconductor substrate is set by a heater in a range greater than 300° C. to 600° C. during the etching to obtain etched side surfaces having a greater than 77° angle with respect to a directly underlying surface without the formation of fences on the etched side surfaces; and wherein a chemical reaction of the etching is enhanced, in comparison to etching using gases other than only hydrogen bromide and oxygen, by not generating harmful etching products and thereby suppressing adhesion of etching products to an inside of a reaction chamber and sidewalls of the capacitor being formed.