Electric lamp and discharge devices – Discharge devices having an electrode of particular material
Reexamination Certificate
2006-06-06
2006-06-06
Guharay, Karabi (Department: 2879)
Electric lamp and discharge devices
Discharge devices having an electrode of particular material
C313S495000, C313S496000, C313S326000, C313S310000, C257S010000, C445S024000
Reexamination Certificate
active
07057333
ABSTRACT:
The method of the invention for extracting electrons in a vacuum consists in:making a cathode presenting at least one junction (9) between a metal (7) acting as an electron reservoir and an n-type semiconductor (8) possessing a surface potential barrier with a height of a few tenths of an electron volt, and presenting thickness lying in the range 1 nm to 20 nm;injecting electrons through the metal/semiconductor junction (9) to create a space charge in the semiconductor (8) sufficient to lower the surface potential barrier of the semiconductor to a value that is less than or equal to 1 eV relative to the Fermi level of the metal (7); andusing the bias source creating an electric field in the vacuum to control the height of the surface potential barrier (Vp) of the n-type semiconductor in order to control the emission of the electron flux towards the anode.
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Dupin Jean-Pierre
Thevenard Paul
Vu Thien Binh
Dennison Schultz Dougherty & MacDonald
Guharay Karabi
Roy Sikha
Universite Claude Bernard Lyon I
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