摘要:
A semiconductor integrated circuit device includes a memory block. The device performs a programming operation, a pre-programming operation, and an erasing operation. The pre-programming operation by which each of the nonvolatile memory cells in the erased state in the memory block including the nonvolatile memory cells is pre-programmed to an intermediate state between the programmed and erased states.
摘要:
In a channel-erase EEPROM, there is a parasitic capacitance between node N1 to which a substrate voltage is supplied and node N2 to which the voltage on a word line is supplied. A negative voltage is applied to the word line in erasing the data in a memory cell. A switch circuit SW1 is connected between node N1 and node N2. Between node N1 and the ground, a switch SW4 is connected. A switch SW5 is connected between node N2 and the ground. When the erase operation has been completed, the switch circuit SW1 is first turned on, short-circuiting node N1 and node N2. Thereafter, the switch circuits SW4, SW5 are turned on, grounding node N1 and node N2 separately.
摘要:
There is disclosed a semiconductor integrated circuit device comprising a memory cell array, row decoder, sense amplifier, column gate with two or more stages connected in series, column gate driving circuit, data latch, multiplexer, and address control circuit, and the multiplexer sequentially selects data corresponding to a predetermined address from a plurality of data latched by the data latch. The address control circuit reverses a driving signal for driving at least one stage of the column gate with two or more stages connected in series and selects the columns designated by the next selected plurality of addresses, while the multiplexer sequentially selects the data corresponding to the predetermined address.
摘要:
There are provided a boosted voltage generating circuit and a semiconductor memory device having the boosted voltage generating circuit which includes a booster circuit for outputting high voltage obtained by boosting the power supply voltage, a regulator circuit supplied with the high voltage, for generating voltage whose voltage value is smaller than the value of the high voltage and which is variably set to at least two values based on the high voltage at the operating time, and a equalizer circuit connected to the booster circuit and regulator circuit, for short-circuiting an output node of the booster circuit and an output node of the regulator circuit in response to a first control signal, wherein the operative period of the regulator circuit and the short-circuiting operation period of the equalizer circuit do not overlap each other.
摘要:
An integrated circuit (IC) includes addressable blocks of memory, and at least one redundant block of memory. A block of memory includes two or more chunks of memory. The IC also includes redundancy control cells. Control circuitry is included to access a first chunk of a redundant block of memory in place of a first remapped chunk one of the addressable blocks of memory, and a second chunk of a redundant block of memory in place of a second remapped chunk one of the addressable blocks of memory, based on the redundancy control cells.
摘要:
Apparatus and methods are disclosed, including an apparatus that includes a number of tiers of a first semiconductor material, each tier including at least one access line of at least one memory cell and at least one source, channel and/or drain of at least one peripheral transistor, such as one used in an access line decoder circuit or a data line multiplexing circuit. The apparatus can also include a number of pillars of a second semiconductor material extending through the tiers of the first semiconductor material, each pillar including either a source, channel and/or drain of at least one of the memory cells, or a gate of at least one of the peripheral transistors. Methods of forming such apparatus are also described, along with other embodiments.
摘要:
A memory cell is accessed by determining an off-current of a set of memory cells, accessing a memory cell of the set of memory cells during an access period, and compensating for the off-current of the set of memory cells.
摘要:
Some embodiments include apparatuses and methods having a first set of conductive lines, a second set of conductive lines, and memory cells located in different levels of the apparatuses and arranged in memory cell strings. At least a portion of the first set of conductive lines is configured as a first set of data lines. At least a portion of the second set of conductive lines is configured as a second set of data lines. Each of the memory strings is coupled to a respective conductive line in the first set of conductive lines and a respective conductive line in the second set of conductive lines. Other embodiments including additional apparatuses and methods are described.
摘要:
An integrated circuit (IC) includes addressable blocks of memory, and at least one redundant block of memory. A block of memory includes two or more chunks of memory. The IC also includes redundancy control cells. Control circuitry is included to access a first chunk of a redundant block of memory in place of a first remapped chunk one of the addressable blocks of memory, and a second chunk of a redundant block of memory in place of a second remapped chunk one of the addressable blocks of memory, based on the redundancy control cells.
摘要:
Apparatus and methods for applying a non-zero voltage differential across a memory cell not involved in an access operation can facilitate improved data retention characteristics.