Abstract:
An electronic device includes two conductive electrodes. A first current path extends from one of the electrodes to the other and has a dominant thermally activated conduction activation energy of 0.5 eV to 3.0 eV. A second current path extends from the one electrode to the other and is circuit-parallel the first current path. The second current path exhibits a minimum 100-times increase in electrical conductivity for increasing temperature within a temperature range of no more than 50°C between 300°C and 800°C and exhibits a minimum 100-times decrease in electrical conductivity for decreasing temperature within the 50°C temperature range. Other embodiments are disclosed.
Abstract:
Electrical devices comprised of nanoscopic wires are described, along with methods of their manufacture and use. The nanoscopic wires can be nanotubes, preferably single-walled carbon nanotubes. They can be arranged in crossbar arrays using chemically patterned surfaces for direction, via chemical vapor deposition. Chemical vapor deposition also can be used to form nanotubes in arrays in the presence of directing electric fields, optionally in combination with self-assembled monolayer patterns. Bistable devices are described.
Abstract:
An electrically addressable passive device for registration, storage and/or processing of data comprises a functional medium (1) in the form of a continuous or patterned structure (S) which may undergo a physical or chemical change of state. The functional medium (1) comprises individually addressable cells (2) which represent a registered or detected value or are assigned a predetermined logical value for the cell. The cell (2) is provided between the anode (3) and cathode (4) in an electrode means (E) which contacts the function medium in the cell and causes an electrical coupling therethrough, the functional medium having a non-linear impedance characteristic, whereby the cell (2) directly can be supplied with energy which effects a change in the state of the cell. In a method for electrical addressing of the passive device wherein the addressing comprises operations for i.a. detection and registration as well as further operations for writing, reading and switching of a logical value assigned to the cell, electric energy is applied directly to the functional medium of the cell in order to change its state and hence effect an addressing operation. Use in optical detector means, volumetric data storage devices or data processing devices.
Abstract:
A phase change memory (PCM) device including a bottom electrode, a bottom heater over the bottom electrode, a bottom buffer layer over the bottom heater, a PCM region over the bottom buffer layer, a top buffer layer over the PCM region, a top heater over the top buffer layer, and a top electrode over the top heater.
Abstract:
Methods and structures for accessing memory cells in parallel in a cross-point array include accessing in parallel a first memory cell disposed between a first selected column and a first selected row and a second memory cell disposed between a second selected column different from the first selected column and a second selected row different from the first selected row. Accessing in parallel includes simultaneously applying access biases between the first selected column and the first selected row and between the second selected column and the second selected row. The accessing in parallel is conducted while the cells are in a thresholded condition or while the cells are in a post-threshold recovery period.
Abstract:
A method and an apparatus for self-heating burn-in have been disclosed. In one embodiment, a semiconductor device includes a plurality of gates, a multiplexer to select a clock signal out of a plurality of clock signals to toggle the plurality of gates in response to the selected clock signal to generate heat intenally for burn-in, and a thermal sensing circuitry to monitor an internal temperature.
Abstract:
The invention relates to computer engineering and can be used for various computer memory devices and for developing video-audio apparatus of new generation, systems of associative memories and synapses (an element of a electric line provided with a programmable electric resistance) for neural networks of neurocomputers. The inventive memory cell makes it possible to preserve several data bits and has a high speed. Said memory cell comprises two aluminium solid electrodes (1 and 2) and a multilayer functional area disposed therebetween and consisting of an active layer (3), a barrier layer (4) and a passive layer (5).
Abstract:
An electronic apparatus includes a circuit board, a memory chip mounted on the circuit board, a memory controller to control an operation of the memory chip, a conductive pattern including a first control line to connect from a first terminal of the memory chip to a first terminal of the memory chip and a second control line to connect from a second terminal of the memory controller to a second terminal of the memory chip, and a capacitive element to provide a termination voltage. The first control line is connected to the capacitive element and the second control line is not connected to the capacitive element.
Abstract:
Circuits and methods are disclosed for voltage-mode bit line precharge for random-access memory cells. A circuit includes an array of random access memory cells; a low-impedance voltage source configured to provide a precharge voltage; and a control circuit configured to precharge a bit line of one of the random access memory cells to the precharge voltage using the low-impedance voltage source prior to reading the one of the random access memory cells.