Patent ID: 7371588
Filing Date: 2008-05-13
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a circuit element on a semiconductor substrate; forming a first insulation film on said semiconductor substrate, said first insulation film covering said circuit element; forming a first electrode on said first insulation film; forming a ferroelectric film on said first electrode; forming a second electrode on said ferroelectric film; forming a mask film on said second electrode, said mask film having a predetermined pattern; etching said second electrode with said semiconductor substrate or a mounting electrode being set to a first temperature within a range of 350° C. to 450° C. using a first mixed gas including Cl etching said ferroelectric film with said semiconductor substrate or said mounting electrode being set to a second temperature within a range of 25° C. to 350° C. using a second mixed gas including Cl etching said first electrode with said semiconductor substrate or said mounting electrode being set to a third temperature within a range of 350° C. to 450° C. using a third mixed gas including Cl