POST PACKAGE REPAIRING METHOD, METHOD OF PREVENTING MULTIPLE ACTIVATION OF SPARE WORD LINES, AND SEMICONDUCTOR MEMORY DEVICE INCLUDING FUSE PROGRAMMING CIRCUIT

摘要

Provided is a method of preventing simultaneous activation of redundancy memory line or spare word lines, the method including: programming a fail address of a memory line determined to be defective; reprogramming the fail address if a first spare line for the memory line is determined to be defective; storing additional information with respect to the reprogrammed fail address; and activating a second spare line and inactivating the first spare line, referring to the additional information.