摘要:
A nonvolatile memory cell includes a volatile selector electrically coupled in series with a nonvolatile memory device. The nonvolatile memory device includes a switching oxide or switching nitride sandwiched between a first bottom electrode and a first top electrode. The volatile selector includes a selector insulator sandwiched between a second bottom electrode and a second top electrode. The selector insulator may be composed of a composite material of a dielectric and fast-diffusing cation metal particles. A memory array including a plurality of the nonvolatile memory cells is also disclosed.
摘要:
A three-dimensional monolithic memory device includes at least one device region and a plurality of contact regions each including a stack of an alternating plurality of conductive word line contact layers and insulating layers located over a substrate, where the stacks in the plurality of contact regions are separated from one another by an insulating material, and a bridge connector including a conductive material extending between a first conductive word line contact layer of a first stack in a first contact region and a second conductive word line contact layer of a second stack in a second contact region, where the first word line contact layer extends in a first contact level substantially parallel to a major surface of the substrate and the second word line contact layer extends in a second contact level substantially parallel to the major surface of the substrate that is different than the first level.
摘要:
A 3D memory array having a vertically oriented thin film transistor (TFT) selection device that has a channel extension, otherwise referred to as a gate/junction offset, is disclosed. The vertically oriented TFT selection device with channel extension serves as a vertical bit line selection device in the 3D memory array. A vertical TFT select device having a channel extension has a high breakdown voltage and low leakage current. The channel extension can be at the top junction or bottom junction of the TFT. Depending on whether the memory elements undergo a forward FORM or reverse FORM, either the bottom or top junction can have the channel extension. This provides for a high voltage junction where needed.
摘要:
A process for forming reversible resistance-switching memory cells having resistance-switching nano-particles (532) which provide a reduced contact area to top (546) and bottom (504) electrodes of the memory cells, thereby limiting a peak current. Recesses are formed in a layered semiconductor material (545) above the bottom electrodes (504), and one or more coatings of nano-particles (532) are applied. The nano-particles (532) self-assemble in the recesses so that they are positioned in a controlled manner. A top electrode material (545) is then deposited. In one approach, the recesses are formed by spaced-apart trenches, and the nano-particles (532) self-assemble along the spaced-apart trenches. In another approach, the recesses for each resistance-switching memory cell are separate from one another, and the resistance-switching memory cells are pillar-shaped. The coatings can be provided in one layer, or in multiple layers which are separated by an insulation layer.
摘要:
A three-dimensional array read/write (R/W) memory elements is formed across multiple layers of planes positioned at different distances above a semiconductor substrate. It is preferable to operate the R/W elements with low current and high resistive states. The resistance of these resistive states depends also on the dimension of the R/W elements and is predetermined by the process technology. A sheet (400) electrode in series with the R/W element (430) and a method of forming it provide another degree of freedom to adjust the resistance of the R/W memory element (430). The thickness of the sheet electrode (400) is adjusted to obtain a reduced cross - sectional contact in the circuit path from the word line (470) to the bit line (440). This allows the R/W memory element (430) to have a much increased resistance and therefore to operate with much reduced currents. The sheet electrode (400) is formed with little increase in cell size.
摘要:
A method of forming a memory cell is provided, the method including forming a diode including a first region having a first conductivity type, counter-doping the diode to change the first region to a second conductivity type, and forming a memory element coupled in series with the diode. Other aspects are also provided.
摘要:
A memristor (100) includes a first electrode (102) formed of a first metal, a second electrode (104) formed of a second material, wherein the second material comprises a different material from the first metal, and a switching layer (110) positioned between the first electrode (102) and the second electrode (104). The switching layer (110) is formed of a composition of a first material comprising the first metal and a second nonmetal material, in which the switching layer (110) is in direct contact with the first electrode (102) and in which at least one conduction channel (120) is configured to be formed in the switching layer (110) from an interaction between the first metal and the second nonmetal material.
摘要:
The present invention relates to a method of forming a memory cell that includes (a) forming one or more layers (104a-c) of steering element material above a substrate; (b) etching a portion (104 c,b) of the steering element material to form a pillar of steering element material having an exposed sidewall; (c) forming a sidewall collar (110) along the exposed sidewall of the pillar; and (d) forming a memory cell (100) using the pillar.