Patent ID: 6842387
Filing Date: 2005-01-11
Classification: G11C

Abstract:
1. A method of repairing a nonvolatile ferroelectric memory device, comprising the steps of: storing fail addresses in a plurality of redundancy coding cells of a redundancy coding section composed of a redundancy master cell and the redundancy coding cells, wherein the redundancy master cell and the redundancy coding cell include a ferroelectric capacitor, respectively; if input addresses satisfy conditions encrypted by a user, activating a master signal through the redundancy master cell by outputting to the redundancy coding section a set signal, a reset signal and a first group of control signals; if the input addresses correspond to the fail addresses stored in the redundancy coding cells, outputting a second group of control signals by performing a logical operation of the master signal; and outputting a third group of control signals for inactivating normal input/output paths and activating redundancy input/output paths by operation of a redundancy control section which receives the second group of control signals as its inputs.