Patent ID: 6623988
Filing Date: 2003-09-23
Classification: H01L

Abstract:
A method for fabricating a ferroelectric capacitor in a semiconductor device comprising:forming a first insulating layer on a substrate and forming a first negatively sloped mask having negatively sloped sides from an upper portion of the sides to a lower portion of the sides; forming a capacitor lower electrode on the first insulating layer using the first negatively sloped mask; forming a second negatively sloped mask having negatively sloped sides from an upper portion of the sides to a lower portion of the sides to expose a partial surface of the lower electrode and forming a ferroelectric layer on the lower electrode using the second negatively sloped mask; forming a third negatively sloped mask having a negatively sloped sides from an upper portion of the sides to a lower portion of the sides to expose a partial surface of the ferroelectric layer and forming an upper electrode and a barrier layer on the ferroelectric layer using the third negatively sloped mask; forming a second insulating layer on an entire surface and selectively etching to form contact holes; and forming plug layers by burying the contact holes and metal lines connected with the plug layers.