Patent ID: 8644074
Filing Date: 2014-02-04
Classification: G11C

Abstract:
1. A nonvolatile memory device, comprising: a string select line and a ground select line connected to a memory cell array, the memory cell array comprising a NAND string; first and second word lines connected to the NAND string; a third word line connected to the NAND string, the third word line being disposed between the first and second word lines, the first word line being disposed between the third word line and the ground select line, the second word line being disposed between the third word line and the string select line; a temperature sensor configured to measure the temperature of the nonvolatile memory device; and a voltage generator configured to generate a first pass voltage and a second pass voltage and a program voltage, wherein while a program operation is performed, the program voltage is applied to the third word line, and the first pass voltage is applied to the first word line, and the second pass voltage is applied to the second word line, and the level of at least one of the first and second pass voltages is controlled according to a measured temperature, and wherein when the measured temperature is lower than a reference temperature the second pass voltage is less than the first pass voltage.