SENUCIBDUCTIR MEMORY DEVICE AND REFRESH METHOD THEREOF

摘要

PURPOSE: A semiconductor memory device and a refresh method thereof are provided to selectively perform a self refresh operation among a plurality of word lines by using refresh information. CONSTITUTION: A memory cell array(110) includes a plurality of word lines. A self refresh controller(150) controls a self refresh operation of the memory cell array. A plurality of word lines include a dummy word line(112). The dummy word line stores refresh information about the word line for a refresh operation.