摘要:
Some embodiments include memory constructions having a plurality of bands between top and bottom electrically conductive materials. The bands include chalcogenide bands alternating with non-chalcogenide bands. In some embodiments, there may be least two of the chalcogenide bands and at least one of the non-chalcogenide bands. In some embodiments, the memory cells may be between a pair of electrodes; with one of the electrodes being configured as a lance, angled plate, container or beam. In some embodiments, the memory cells may be electrically coupled with select devices, such as, for example, diodes, field effect transistors or bipolar junction transistors.
摘要:
A diode and memory device including the diode, where the diode includes a conductive portion and another portion formed of a first material that has characteristics allowing a first decrease in a resistivity of the material upon application of a voltage to the material, thereby allowing current to flow there through, and has further characteristics allowing a second decrease in the resistivity of the first material in response to an increase in temperature of the first material.
摘要:
The present disclosure provides one embodiment of a method for operating a multi-level resistive random access memory (RRAM) cell having a current-controlling device and a RRAM device connected together. The method is free of a “forming” step and includes setting the RRAM device to one of resistance levels by controlling the current-controlling device to one of current levels. The setting the RRAM device includes applying a first voltage to a top electrode of the RRAM device and applying a second voltage to a bottom electrode of the RRAM device. The second voltage is higher than the first voltage.
摘要:
A selection device, non-volatile memory cell, and method of fabricating the same. The selection device employs an oxide laminate structure including a tunneling oxide layer and a metal-cluster oxide layer between first and second electrodes, enabling a high selection ratio and sufficient on-current density to allow program data recordation in a memory cell at relatively low voltage. The non-volatile memory cell includes the selection device electrically connected to a resistive random access memory device, including a resistance change layer, enabling suppression of current leakage from a non-selected adjacent memory cell in an array structure. In the method of fabrication, a tunneling oxide layer is formed by depositing and oxidizing a metal layer to control oxygen vacancy density in the metal-cluster oxide layer, and an interface oxide layer is formed in the tunneling oxide layer by doping of metal-clusters in the metal-cluster oxide layer, improving on-current density of the selection device.
摘要:
A current steering element (100) formed such that the current steering element covers a lower opening (105) of a via hole (104) formed in an interlayer insulating layer (102), comprises: a corrosion-suppressing layer (106) formed on a lower side of a lower opening of the via hole such that the corrosion-suppressing layer covers an entire portion of the lower opening; a second electrode layer (108) formed under the corrosion-suppressing layer and comprising a material different from a material of the corrosion-suppressing layer; a current steering layer (110) formed under the second electrode layer such that the current steering layer is physically in contact with the second electrode layer; and a first electrode layer (112) formed under the current steering layer such that the first electrode layer is physically in contact with the current steering layer; and the first electrode layer, the current steering layer and the second electrode layer constitute one of a MSM diode and a MIM diode.
摘要:
Provided are resistive memory devices and methods of fabricating the same. The resistive memory devices and the methods are advantageous for high integration because they can provide a multilayer memory cell structure. Also, the parallel conductive lines of adjacent layers do not overlap each other in the vertical direction, thus reducing errors in program/erase operations.
摘要:
Disclosed is a substrate-mediated assembly for graphene structures. According to an embodiment, long-range ordered, multilayer BN(111) films can be formed by atomic layer deposition (ALD) onto a substrate. The subject BN(111) films can then be used to order carbon atoms into a graphene sheet during a carbon deposition process.
摘要:
Some embodiments include methods of forming diodes. The methods may include oxidation of an upper surface of a conductive electrode to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of an oxidizable material over a conductive electrode, and subsequent oxidation of the oxidizable material to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of a metal halide layer over a conductive electrode. Some embodiments include diodes that contain a metal halide layer between a pair of diode electrodes.
摘要:
Methods of forming diode structures for use in memory cells and memory arrays, such as resistive random access memory (RRAM). The methods include forming a first electrode by chemisorbing a graphite material (e.g., graphene) on a conductive material. A low-k dielectric material may be formed over surfaces of the first electrode exposed through an opening in a dielectric material overlying the first electrode, followed by formation of a high-k dielectric material over the low-k dielectric material. A remaining portion of the opening may be filled with another conductive material to form a second electrode. The first and second electrodes of the resulting diode structure have different work functions and, thus, provide a low thermal budget, a low contact resistance, a high forward-bias current and a low reverse-bias current. A memory cell and a memory array including such a diode structure are also disclosed.
摘要:
A three-terminal Ovonic Threshold Switch (OTS) is used to provide current to a Phase Change Memory Switch (PCMS) cross point array. The current is started by sending a small current into the second terminal of the three-terminal OTS allowing a larger current to flow from the first terminal to the third terminal of the three-terminal OTS. A method of making the three-terminal OTS is also presented.