Patent ID: 9093418
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A manufacture method for a semiconductor device comprising: forming a ferroelectric capacitor over a semiconductor substrate, the ferroelectric capacitor comprising a lower electrode, a ferroelectric film and an upper electrode stacked in an order recited; forming a capacitor protective film of aluminum oxide, the capacitor protective film covering the ferroelectric capacitor; forming a lower insulating film of silicon oxide having a thickness equal to or thicker than 300 nm over the capacitor protective film by plasma enhanced chemical vapor deposition using tetraethoxysilane-containing gas as source gas; forming an upper insulating film of silicon oxide directly on and in contact with the lower insulating film by chemical vapor deposition using high density plasma; planarizing a surface of the upper insulating film; forming an upper capacitor protective film of aluminum oxide over the planarized upper insulating film; forming an upper first insulating film of silicon oxide having a thickness equal to or thicker than 300 nm over the upper capacitor protective film by plasma enhanced chemical vapor deposition using tetraethoxysilane-containing gas as source gas; forming a first wiring of conductive material over the upper first insulating film; and forming an upper second insulating film of silicon oxide over the upper first insulating film by chemical vapor deposition using high density plasma, the upper second insulating film covering the first wiring.