Patent ID: 7091052
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A method of forming a ferroelectric device, comprising: forming at least one active area on a silicon substrate by an isolation area; depositing a plurality of layers on the at least one active area and the isolation area, wherein the plurality of layers includes an insulator layer, a first electrode layer, a ferroelectric layer, a second electrode layer, and a first dielectric layer, wherein the ferroelectric layer comprises a material selected from a group consisting of PZT, BaMgF etching at least one of the plurality of layers based on a word line mask to form a first etched layer and an unetched layer; forming a first spacer to define the first etched layer; etching at least a portion of the unetched layer based on the first spacer to form a second etched layer; forming a second spacer to define the second etched layer; forming an interlayer dielectric; opening a contact hole in the interlayer dielectric; and forming a conductor to fill the contact hole.