Abstract:
Non-volatile memory devices and methods of programming a non-volatile memory device in which electrons are moved between charge trap layers through a pad oxide layer are provided. The non-volatile memory devices include a charge trap layer on a semiconductor substrate and storing electrons, a pad oxide layer on the first charge trap layer, and a second trap layer on the pad oxide layer and storing electrons. In a programming mode in which data is written, the stored electrons are moved between a first position of the first charge trap layer and a first position of the second charge trap layer through the pad oxide layer or between a second position of the first charge trap layer and a second position of the second charge trap layer through the pad oxide layer.
Abstract:
Provided is a method and device for reducing lateral movement of charges. The method may include pre-programming at least one memory cell that is in an erased state by applying a pre-programming voltage to the at least one memory cell to have a narrower distribution of threshold voltages than the at least one erased state memory cell and verifying that the pre-programmed memory cell is in the pre-programmed state using a negative effective verifying voltage.
Abstract:
The memory device includes a source region and a drain region in a substrate and spaced apart from each other; a memory cell formed on a surface of the substrate, wherein the memory cell connects the source region and the drain region and includes a plurality of nanocrystals; a control gate formed on the memory cell. The memory cell includes a first tunneling oxide layer formed on the substrate; a second tunneling oxide layer formed on the first tunneling oxide layer; and a control oxide layer formed on the second tunneling oxide layer. The control oxide layer includes the nanocrystals. The second tunneling oxide layer, having an aminosilane group the increases electrostatic attraction, may be hydrophilic, enabling the formation of a monolayer of the nanocrystals.
Abstract:
Non-volatile memory devices and methods of programming a non-volatile memory device in which electrons are moved between charge trap layers through a pad oxide layer are provided. The non-volatile memory devices include a charge trap layer on a semiconductor substrate and storing electrons, a pad oxide layer on the first charge trap layer, and a second trap layer on the pad oxide layer and storing electrons. In a programming mode in which data is written, the stored electrons are moved between a first position of the first charge trap layer and a first position of the second charge trap layer through the pad oxide layer or between a second position of the first charge trap layer and a second position of the second charge trap layer through the pad oxide layer.
Abstract:
Provided are a charge trap memory device and method of manufacturing the same. A charge trap memory device may include a tunnel insulating layer on a substrate, a charge trap layer on the tunnel insulating layer, and a blocking insulating layer formed of a material including Gd or a smaller lanthanide element on the charge trap layer.
Abstract:
Provided is a method of operating a nonvolatile memory device to perform an erase operation. The method includes applying a composite pulse including a direct current (DC) pulse and a DC perturbation pulse to the nonvolatile memory device to perform the erase operation.
Abstract:
Provided are a charge trap semiconductor memory device including a charge trap layer on a semiconductor substrate, and a method of manufacturing the charge trap semiconductor memory device. The method includes: (a) coating a first precursor material on a surface of a semiconductor substrate to be deposited and oxidizing the first precursor material to form a first layer formed of an insulating material; (b) coating a second precursor material formed of metallicity on the first layer; (c) supplying the first precursor material on the surface coated with the second precursor material to substitute the second precursor material with the first precursor material; and (d) oxidizing the first and second precursor materials obtained in (c) to form a second layer formed of an insulating material and a metal impurity, and (a) through (d) are performed at least one time to form a charge trap layer having a structure in which the metal impurity is isolated in the insulating material.
Abstract:
Provided are a nonvolatile semiconductor memory device and a method of manufacturing the same. The nonvolatile semiconductor memory device may include a tunnel insulating layer formed on a semiconductor substrate, a charge trap layer including a dielectric layer doped with a transition metal formed on the tunnel insulating layer, a blocking insulating layer formed on the charge trap layer, and a gate electrode formed on the blocking insulating layer. The dielectric layer may be a high-k dielectric layer, for example, a HfO2 layer. Thus, the data retention characteristics of the nonvolatile semiconductor memory device may be improved because a deeper charge trap may be formed by doping the high-k dielectric layer with a transition metal.
Abstract:
Provided is a memory device comprising a substrate, a source region, and a drain region that may be formed in the substrate and spaced apart from each other, a memory cell that may be formed on the surface of the substrate, connecting the source region and the drain region, and including a plurality of nanocrystals, wherein the memory cell comprises a first tunneling oxide layer formed on the substrate, and a control oxide layer including a plurality of nanocrystals formed on the tunneling oxide layer and a control gate formed on the memory cell. The memory device may include a polyelectrolyte film which enables a uniform arrangement of nanocrystals. The device characteristics may be controlled and a memory device with improved device characteristics may be provided.
Abstract:
A semiconductor memory device includes a stack of word lines and insulating patterns. Cell pillars extend vertically through the stack of word lines and insulating patterns with memory cells being formed at the junctions of the cell pillars and the word lines. A ratio of the thickness of the word lines to the thickness of immediately neighboring insulating patterns is different at different locations along one or more of the cell pillars. Related methods of manufacturing and systems are also disclosed.