摘要:
The control circuit performs a reset operation and a set operation that change the resistance states of phase change memory cells of the array. The control circuit changes at least one parameter, of at least one of the reset operation and the set operation for future operations. This change is responsive to an indicator of degraded memory state retention of the array.
摘要:
A non-volatile VG memory array employing memory semiconductor cells capable of storing two bits of information having a non-conducting charge trapping dielectric, such as silicon nitride, layered in associating with at least one electrical insulating layer, such as an oxide, is disclosed. Bit lines of the memory array are capable of transmitting positive voltage to reach the source/drain regions of the memory cells of the array. A method that includes the hole injection erasure of the memory cells of the array that lowers the voltage threshold of the memory cells to a value lower than the initial voltage threshold of the cells is disclosed. The hole injection induced lower voltage threshold reduces the second bit effect such that the window of operation between the programmed and un-programmed voltage thresholds of the bits is widened. The programming and read steps reduce leakage current of the memory cells in the array.
摘要:
A semiconductor device having high-aspect-ratio PN-junctions is provided. The semiconductor device includes a conducting layer. The semiconductor device further includes a plurality of first doped regions formed over the conducting layer. The sidewalls of the doped regions are doped to form PN-junctions. The semiconductor device also includes a plurality of second doped regions over the first doped regions.
摘要:
A phase change memory device with a memory element including a basis phase change material, such as a chalcogenide, and one or more additives, where the additive or additives have a non-constant concentration profile along an inter-electrode current path through a memory element. The use of “non-constant” concentration profiles for additives enables doping the different zones with different materials and concentrations, according to the different crystallographic, thermal and electrical conditions, and different phase transition conditions.
摘要:
A method of operating a memory cell for 3D array of this invention is described as follows. Carriers of a first type are injected into a charge storage layer of the memory cell by applying a double-side biased (DSB) voltage to double sides of the memory cell. Carriers of a second type are injected into the charge storage layer by applying FN voltages.
摘要:
A memory structure that combines embedded flash memory and PPROM. The PPROM can be used as a memory structure. The flash memory can be used, e.g., as air replacement cells or back up memory, or additional memory cells. The PPROM cells are stacked on top of the flash memory cells and the PPROM density can be increased by implementing three-dimensional PPROM structures.
摘要:
The control circuit performs a reset operation and a set operation that change the resistance states of phase change memory cells of the array. The control circuit changes at least one parameter, of at least one of the reset operation and the set operation for future operations. This change is responsive to an indicator of degraded memory state retention of the array.
摘要:
An integrated circuit phase change memory can be pre-coded by inducing a first resistance state in some cells and the memory, and a second resistance state and some other cells in the memory to represent a data set. The integrated circuit phase change memory is mounted on a substrate after coding the data set. After mounting the integrated circuit phase change memory, the data set is read by sensing the first and second resistance states, and changing cells in the first resistance state to a third resistance state and changing cells in the second resistance state to a fourth resistance state. The first and second resistance states maintain a sensing margin after solder bonding or other thermal cycling process. The third and fourth resistance states are characterized by the ability to cause a transition using higher speed and lower power, suitable for a mission function of a circuit.
摘要:
A method of operating a memory cell for 3D array of this invention is described as follows. Carriers of a first type are injected into a charge storage layer of the memory cell by applying a double-side biased (DSB) voltage to double sides of the memory cell. Carriers of a second type are injected into the charge storage layer by applying FN voltages.
摘要:
A non-volatile VG memory array employing memory semiconductor cells capable of storing two bits of information having a non-conducting charge trapping dielectric, such as silicon nitride, layered in associating with at least one electrical insulating layer, such as an oxide, is disclosed. Bit lines of the memory array are capable of transmitting positive voltage to reach the source/drain regions of the memory cells of the array. A method that includes the hole injection erasure of the memory cells of the array that lowers the voltage threshold of the memory cells to a value lower than the initial voltage threshold of the cells is disclosed. The hole injection induced lower voltage threshold reduces the second bit effect such that the window of operation between the programmed and un-programmed voltage thresholds of the bits is widened. The programming and read steps reduce leakage current of the memory cells in the array.