Abstract:
A method of formation of an isolation structure for vertical semiconductor devices, the resulting isolation structure, and a memory device to prevent leakage among adjacent vertical semiconductor devices are described.
Abstract:
Some embodiments include methods of forming diodes in which a first electrode is formed to have a pedestal extending upwardly from a base. At least one layer is deposited along an undulating topography that extends across the pedestal and base, and a second electrode is formed over the least one layer. The first electrode, at least one layer, and second electrode together form a structure that conducts current between the first and second electrodes when voltage of one polarity is applied to the structure, and that inhibits current flow between the first and second electrodes when voltage having a polarity opposite to said one polarity is applied to the structure. Some embodiments include diodes having a first electrode that contains two or more projections extending upwardly from a base, having at least one layer over the first electrode, and having a second electrode over the at least one layer.
Abstract:
Some embodiments include memory devices having a wordline, a bitline, a memory element selectively configurable in one of three or more different resistive states, and a diode configured to allow a current to flow from the wordline through the memory element to the bitline responsive to a voltage being applied across the wordline and the bitline and to decrease the current if the voltage is increased or decreased. Some embodiments include memory devices having a wordline, a bitline, memory element selectively configurable in one of two or more different resistive states, a first diode configured to inhibit a first current from flowing from the bitline to the wordline responsive to a first voltage, and a second diode comprising a dielectric material and configured to allow a second current to flow from the wordline to the bitline responsive to a second voltage.
Abstract:
Memory devices are shown that include a body region and a connecting region that is formed from a semiconductor with a lower band gap than the body region. Connecting region configurations can provide increased gate induced drain leakage during an erase operation. Configurations shown can provide a reliable bias to a body region for memory operations such as erasing, and containment of charge in the body region during a boost operation.
Abstract:
Methods and structures are described for reducing leakage currents in semiconductor memory storage cells. Vertically oriented nanorods may be used in the channel region of an access transistor. The nanorod diameter can be made small enough to cause an increase in the electronic band gap energy in the channel region of the access transistor, which may serve to limit channel leakage currents in its off-state. In various embodiments, the access transistor may be electrically coupled to a double-sided capacitor. Memory devices according to embodiments of the invention, and systems including such devices are also disclosed.
Abstract:
Some embodiments include memory cells including a memory component having a first conductive material, a second conductive material, and an oxide material between the first conductive material and the second conductive material. A resistance of the memory component is configurable via a current conducted from the first conductive material through the oxide material to the second conductive material. Other embodiments include a diode comprising metal and a dielectric material and a memory component connected in series with the diode. The memory component includes a magnetoresistive material and has a resistance that is changeable via a current conducted through the diode and the magnetoresistive material.
Abstract:
A stacked non-volatile memory device uses amorphous silicon based thin film transistors stacked vertically. Each layer of transistors or cells is formed from a deposited a-Si channel region layer having a predetermined concentration of carbon to form a carbon rich silicon film or silicon carbide film, depending on the carbon content. The dielectric stack is formed over the channel region layer. In one embodiment, the dielectric stack is an ONO structure. The control gate is formed over the dielectric stack. This structure is repeated vertically to form the stacked structure. In one embodiment, the carbon content of the channel region layer is reduced for each subsequently formed layer.
Abstract:
Abstract of DisclosureA semiconductor structure which includes a raised source and a raised drain. The structure also includes a gate located between the source and drains. The gate defines a first gap between the gate and the source and a second gap between the gate and the drain.
Abstract:
A field effect transistor construction includes a semiconductive channel core. A source/drain region is at opposite ends of the channel core. A gate is proximate a periphery of the channel core. A gate insulator is between the gate and the channel core. The gate insulator has local regions radially there-through that have different capacitance at different circumferential locations relative to the channel core periphery. Additional constructions, and methods, are disclosed.
Abstract:
A field effect transistor construction includes a semiconductive channel core. A source/drain region is at opposite ends of the channel core. A gate is proximate a periphery of the channel core. A gate insulator is between the gate and the channel core. The gate insulator has local regions radially there-through that have different capacitance at different circumferential locations relative to the channel core periphery. Additional constructions, and methods, are disclosed.