Method and system of using nanotube fabrics as joule heating...

Details Method and system of using nanotube fabrics as joule heating... Method and system of using nanotube fabrics as joule heating...

H - Electricity

01

L

H01L 21/00 (2006.01)

Patent

CA 2621397

Methods and systems of using nanotube elements as joule heating elements for memories and other applications. Under one aspect, a method includesproviding an electrical stimulus, regulated by a drive circuit, through a nanotube element in order to heat an adjacent article. Further, a detection circuit electrically gauges the state of the article. The article heated by the nanotube element is, in preferred embodiments, a phase changing material, hi memory applications, the invention may be used as a small-scale CRAM capable of employing small amounts of current to induce rapid, large temperature changes in a chalcogenide material. Under various embodiments of the disclosed invention, the nanotube element is composed of a non-woven nanotube fabric which is either suspended from supports and positioned adjacent to the phase change material or is disposed on a substrate and in direct contact with the phase change material. A plurality of designs using various geometric orientations of nanotube fabrics, phase change materials, and drive and detection circuitry is disclosed. Additionally, methods of fabricating nanotube heat emitters are disclosed.

L'invention concerne des procédés et des systèmes d'utilisation d'éléments nanotubes comme éléments de chauffage ohmique destinés à des mémoires et autres applications. Dans un aspect, un procédé consiste à fournir un stimulus électrique, régulé par un circuit de commande, par le biais d'un élément nanotube afin de chauffer un article contigu. En outre, un circuit de détection mesure électriquement l'état de l'article. L'article chauffé par l'élément nanotube est, dans des modes de réalisation préférés, un matériau à changement de phase. Dans des applications mémoire, l'invention concerne une mémoire vive en chalcogénure (CRAM) de petite échelle capable d'utiliser de petites quantités de courant pour induire des changements de température importants dans un matériau chalcogénure. Dans divers modes de réalisation, l'élément nanotube est composé d'un tissu nanotube non-tissé suspendu à des supports et jouxtant le matériau à changement de phase ou placé sur un substrat et en contact direct avec ledit matériau à changement de phase. L'invention concerne plusieurs conceptions utilisant diverses orientations géométriques des tissus nanotubes, des matériaux à changement de phase, et des circuits de commande et de détection. De plus, elle concerne des procédés de fabrication d'émetteurs de chaleur de nanotubes.

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