Field electron emission materials and devices

Details Field electron emission materials and devices Field electron emission materials and devices

H - Electricity

01

J

H01J 1/30 (2006.01) H01J 1/304 (2006.01) H01J 9/02 (2006.01)

Patent

CA 2312910

A field electron emission material is formed by coating a substrate (221, 230) having an electrically conductive surface with a plurality of electrically conductive particles (223, 231). Each particle has a layer of electrically insulating material (222, 232) disposed either in a first location between the conductive surface of the substrate (221) and the particle (223), or in a second location between the particle (231) and the environment (237) in which the field electron emission material is disposed, but not in both of such first and second locations, so that at least some of the particles (223, 231) form electron emission sites at such first or second locations. A number of field emission devices are disclosed, utilising such electron emission material.

On produit ce matériau à émission électronique par effet de champ en déposant plusieurs particules de particules conductrices (223, 231) sur un substrat (221, 230) possédant une surface conductrice. Chaque particule est pourvue d'une couche de matière isolante (222, 232) se trouvant, soit entre la surface conductrice du substrat (221) et la particule (223), soit entre la particule (231) et l'environnement (237) dans lequel se trouve le matériau à émission électronique par effet de champ, cette couche ne pouvant pas, toutefois, se trouver à la fois aux deux emplacements précités. De la sorte, certaines particules au moins (223, 231) constituent des sites d'émission électronique par effet de champ au premiers ou aux seconds emplacements. L'invention porte également sur un certain nombre de dispositifs à émission électronique par effet de champ utilisant ces matériaux.

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