摘要:
When a data erase operation is performed in one memory cell block, a first voltage is applied to one source line selected from m source lines in the one memory cell block. A second voltage equal to a voltage of the source lines before the data erase operation begins is applied to the other source lines. Then, after a certain time delay from application of the first voltage, a third voltage smaller than the first voltage is applied to a third conductive layer of a source-side selection transistor connected to a selected source line. Then, a hole current is produced near a third gate insulation layer due to a potential difference between the first and third voltage. A fourth voltage is applied to one of first conductive layers connected to one of the memory transistor to be erased. The other first conductive layers are brought into a floating state.
摘要:
A semiconductor storage device has a nonvolatile storage region, a voltage generating circuit that generates an operational voltage for the storage region, and a control circuit that sends the voltage generated by the voltage generating circuit to the storage region. The voltage generating circuit has a transistor, a first resistance element, a second resistance element, and a comparator. The first resistance element and the second resistance element have wiring structure for resistance. The resistance wiring in the wiring structure has the same line width as the finest line width in the wiring formed in the storage region.
摘要:
A semiconductor memory device comprises: a semiconductor substrate; a plurality of memory units provided on the semiconductor substrate and each including a plurality of memory cells that are stacked; and a plurality of bit lines formed above each of a plurality of the memory units aligned in a column direction, an alignment pitch in a row direction of the plurality of bit lines being less than an alignment pitch in the row direction of the memory units, and an end of each of the memory units aligned in the column direction being connected to one of the plurality of bit lines formed above the plurality of the memory units aligned in the column direction.
摘要:
A non-volatile semiconductor storage device includes: a memory string including a plurality of memory cells connected in series; a first selection transistor having one end connected to one end of the memory string; a first wiring having one end connected to the other end of the first selection transistor; a second wiring connected to a gate of the first selection transistor. A control circuit is configured to boost voltages of the second wiring and the first wiring in the erase operation, while keeping the voltage of the first wiring greater than the voltage of the second wiring by a certain potential difference. The certain potential difference is a potential difference that causes a GIDL current.
摘要:
A non-volatile semiconductor memory device includes a peripheral circuit having multilayer wirings. Above this peripheral circuit, a plurality of memory strings is formed. The memory strings include a plurality of memory cells and a back gate transistor connected in series. Multiple back gate layers are formed to function as a control electrode of the back gate transistor. A first connection part composed of semiconductor films connects a lower surface of one of the back gate layers and an upper surface of the uppermost wiring layer of the multilayer wirings, and a barrier metal film is disposed above the uppermost wiring layer.
摘要:
A memory string is configured by a plurality of memory transistors and a spare memory transistor connected in series. Word lines are connected to gates of the memory transistors. A spare word line is connected to a gate of the spare memory transistor. The memory string comprises a first semiconductor layer, a charge storage layer, a plurality of first conductive layers, and a second conductive layer. The first semiconductor layer extends in a perpendicular direction with respect to a substrate. The charge storage layer surrounds a side surface of the first semiconductor layer. The plurality of first conductive layers surround a side surface of the first semiconductor layer with the charge storage layer interposed therebetween, and function as the word lines. The second conductive layer surrounds a side surface of the first semiconductor layer with the charge storage layer interposed therebetween, and functions as the spare word line.
摘要:
A memory string is configured by a plurality of memory transistors and a spare memory transistor connected in series. Word lines are connected to gates of the memory transistors. A spare word line is connected to a gate of the spare memory transistor. The memory string comprises a first semiconductor layer, a charge storage layer, a plurality of first conductive layers, and a second conductive layer. The first semiconductor layer extends in a perpendicular direction with respect to a substrate. The charge storage layer surrounds a side surface of the first semiconductor layer. The plurality of first conductive layers surround a side surface of the first semiconductor layer with the charge storage layer interposed therebetween, and function as the word lines. The second conductive layer surrounds a side surface of the first semiconductor layer with the charge storage layer interposed therebetween, and functions as the spare word line.
摘要:
A nonvolatile semiconductor memory device comprises: a plurality of first memory strings; a first select transistor having one end thereof connected to one end of the first memory strings; a first line commonly connected to the other end of a plurality of the first select transistors; a switch circuit having one end thereof connected to the first line; and a second line commonly connected to the other end of a plurality of the switch circuits. The switch circuit controls electrical connection between the second line and the first line.
摘要:
When a data erase operation is performed in one memory cell block, a first voltage is applied to one source line selected from m source lines in the one memory cell block. A second voltage equal to a voltage of the source lines before the data erase operation begins is applied to the other source lines. Then, after a certain time delay from application of the first voltage, a third voltage smaller than the first voltage is applied to a third conductive layer of a source-side selection transistor connected to a selected source line. Then, a hole current is produced near a third gate insulation layer due to a potential difference between the first and third voltage. A fourth voltage is applied to one of first conductive layers connected to one of the memory transistor to be erased. The other first conductive layers are brought into a floating state.
摘要:
A non-volatile semiconductor storage device includes: a memory string including a plurality of memory cells connected in series; a first selection transistor having one end connected to one end of the memory string; a first wiring having one end connected to the other end of the first selection transistor; a second wiring connected to a gate of the first selection transistor. A control circuit is configured to boost voltages of the second wiring and the first wiring in the erase operation, while keeping the voltage of the first wiring greater than the voltage of the second wiring by a certain potential difference. The certain potential difference is a potential difference that causes a GIDL current.