NONVOLATILE SEMICONDUCTOR MEMORY DEVICE AND MEMORY SYSTEM HAVING THE SAME

摘要

A nonvolatile semiconductor memory device includes a first string including a first number of memory cells connected in series each storing therein information in a nonvolatile manner; and a second string including a second number of memory cells connected in series each storing therein information in a nonvolatile manner, wherein the second number is smaller than the first number.