Patent ID: 7645617
Filing Date: 2010-01-12
Classification: G11C,H01L

Abstract:
1. A method for manufacturing a nonvolatile ferroelectric memory device comprising the step of: etching a silicon substrate to have a T shape using an etching mask formed over the silicon substrate to form a plurality of T-shaped silicons spaced with a given interval; forming an insulating layer in a T-shaped etching region formed between the plurality of T-shaped silicons and filling a silicon between the plurality of T-shaped silicons to grow a silicon crystal; sequentially forming a ferroelectric layer and a word line over the resulting structure, and etching the ferroelectric layer and the word line selectively; ion-implanting impurities into the plurality of T-shaped silicons and the silicon to form drain/source regions, and forming a floating channel layer separated from the drain/source regions; and forming a sensing line and a bit line over the impurities.