摘要:
Electromechanical circuits, such as memory cells, and methods for making same are disclosed. The circuits include a structure having electrically conductive traces and supports extending from a surface of the substrate, and nanotube ribbons suspended by the supports that cross the electrically conductive traces, wherein each ribbon comprises one or more nanotubes. The electro-mechanical circuit elements are made by providing a structure having electrically conductive traces and supports, in which the supports extend from a surface of the substrate. A layer of nanotubes is provided over the supports, and portions of the layer of nanotubes are selectively removed to form ribbons of nanotubes that cross the electrically conductive traces. Each ribbon includes one or more nanotubes.
摘要:
Nanotube on gate FET structures and applications of such, including n2 crossbars requiring only 2n control lines. A non-volatile transistor device includes a source region and a drain region of a first semiconductor type of material and a channel region of a second semiconductor type of material disposed between the source and drain region. A gate structure is made of at least one of semiconductive or conductive material and is disposed over an insulator over the channel region. A control gate is made of at least one of semiconductive or conductive material. An electromechanically-deflectable nanotube switching element is in fixed contact with one of the gate structure and the control gate structure and is not in fixed contact with the other of the gate structure and the control gate structure. The device has a network of inherent capacitances, including an inherent capacitance of an undeflected nanotube switching element in relation to the gate structure. The network is such that the nanotube switching element is deflectable into contact with the other of the gate structure and the control gate structure in response to signals being applied to the control gate and one of the source region and drain region. Certain embodiments of the device have an area of about 4 F2. Other embodiments include a release line is positioned in spaced relation to the nanotube switching element, and having a horizontal orientation that is parallel to the orientation of the source and drain diffusions. Other embodiments provide an n2 crossbar array having n2 non-volatile transistor devices, but require only 2n control lines.
摘要:
A non-volatile memory array includes a plurality of memory cells, each cell receiving a bit line, word line, and release line. Each memory cell includes a cell selection transistor and a restore transistor with first, second and third nodes. Each cell further includes an electromechanically deflectable switch, the position of which manifests the logical state of the cell. Each cell is bit selectable for read and write operations.
摘要:
Electromechanical circuits, such as memory cells, and methods for making same are disclosed. The circuits include a structure having electrically conductive traces and supports extending from a surface of the substrate, and nanotube ribbons suspended by the supports that cross the electrically conductive traces, wherein each ribbon comprises one or more nanotubes. The electro-mechanical circuit elements are made by providing a structure having electrically conductive traces and supports, in which the supports extend from a surface of the substrate. A layer of nanotubes is provided over the supports, and portions of the layer of nanotubes are selectively removed to form ribbons of nanotubes that cross the electrically conductive traces. Each ribbon includes one or more nanotubes.
摘要:
Under one aspect, a field effect device includes a gate, a source, and a drain, with a conductive channel between the source and the drain; and a nanotube switch having a corresponding control terminal, said nanotube switch being positioned to control electrical conduction through said conductive channel. Under another aspect, a field effect device includes a gate having a corresponding gate terminal; a source having a corresponding source terminal; a drain having a corresponding drain terminal; a control terminal; and a nanotube switching element positioned between one of the gate, source, and drain and its corresponding terminal and switchable, in response to electrical stimuli at the control terminal and at least one of the gate, source, and drain terminals, between a first non-volatile state that enables current flow between the source and the drain and a second non-volatile state that disables current flow between the source and the drain.
摘要:
Under one aspect, non-volatile transistor device includes a source and drain with a channel in between; a gate structure made of a semiconductive or conductive material disposed over an insulator over the channel; a control gate made of a semiconductive or conductive material; and an electromechanically-deflectable nanotube switching element in fixed contact with one of the gate structure and the control gate structure and is not in fixed contact with the other of the gate structure and the control gate structure. The device has a network of inherent capacitances, including an inherent capacitance of an undeflected nanotube switching element in relation to the gate structure. The network is such that the nanotube switching element is deflectable into contact with the other of the gate structure and the control gate structure in response to signals being applied to the control gate and one of the source region and drain region.
摘要:
Methods of producing an electromechanical circuit element are described. A lower structure having lower support structures and a lower electrically conductive element is provided. A nanotube ribbon (or other electromechanically responsive element) is formed on an upper surface of the lower structure so as to contact the lower support structures. An upper structure is provided over the nanotube ribbon. The upper structure includes upper support structures and an upper electrically conductive element. In some arrangements, the upper and lower electrically conductive elements are in vertical alignment, but in some arrangements they are not.
摘要:
Electromechanical circuits, such as memory cells, and methods for making same are disclosed. The circuits include a structure having electrically conductive traces and supports extending from a surface of the substrate, and nanotube ribbons suspended by the supports that cross the electrically conductive traces, wherein each ribbon comprises one or more nanotubes. The electro-mechanical circuit elements are made by providing a structure having electrically conductive traces and supports, in which the supports extend from a surface of the substrate. A layer of nanotubes is provided over the supports, and portions of the layer of nanotubes are selectively removed to form ribbons of nanotubes that cross the electrically conductive traces. Each ribbon includes one or more nanotubes.
摘要:
A memory system having electromechanical memory cells and decoders is disclosed. A decoder circuit selects at least one of the memory cells of an array of such cells. Each cell in the array is a crossbar junction at least one element of which is a nanotube or a nanotube ribbon. The decoder circuit is constructed of crossbar junctions at least one element of each junction being a nanotube or a nanotube ribbon.
摘要:
A memory system having electromechanical memory cells and decoders is disclosed. A decoder circuit selects at least one of the memory cells of an array of such cells. Each cell in the array is a crossbar junction at least one element of which is a nanotube or a nanotube ribbon. The decoder circuit is constructed of crossbar junctions at least one element of each junction being a nanotube or a nanotube ribbon.