Patent ID: 7368298
Filing Date: 2008-05-06
Classification: G11C,H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: forming a lower electrode film; forming a ferroelectric film on the lower electrode film; forming a first upper electrode film on the ferroelectric film; performing first annealing to crystallize the ferroelectric film after forming the first upper electrode film; forming a second upper electrode film on the first upper electrode film after performing said first annealing to crystallize the ferroelectric film; patterning the second upper electrode film, the first upper electrode film, the crystallized ferroelectric film, and the lower electrode film to form a patterned ferroelectric capacitor; forming an aluminum oxide film covering all of the upper surface and the side surface of the patterned ferroelectric capacitor; and performing second annealing of the crystallized ferroelectric film in an oxidizing gas atmosphere after forming the aluminum oxide film, wherein no heat treatment is performed between said step of forming the second upper electrode film and said step of performing the second annealing of the crystallized ferroelectric film.