| US 7,524,227 B2 | ||
| Method of producing an electron emission device, method of producing an electron source, method of producing an image display device, and method of driving an electron emission device | ||
| Michiyo Nishimura, Kanagawa-Ken (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 10, 2005, as Appl. No. 11/75,855. | ||
| Claims priority of application No. 2004-070827 (JP), filed on Mar. 12, 2004. | ||
| Prior Publication US 2005/0202745 A1, Sep. 15, 2005 | ||
| Int. Cl. H01J 9/44 (2006.01) | ||
| U.S. Cl. 445—6 [445/3; 313/495] | 7 Claims |
| 1. A method of producing an electron emission device comprising a first conductive film having an electron emission part and
a second conductive film spaced apart from the first conductive film, the electron emission device capable of being driven
by applying a higher electric potential to the second conductive film than an electric potential of the first conductive film,
the method comprising:
(A) a first step of preparing a first conductive film, second conductive film, and a material which constitutes an electron
emission part and is connected at least to the first conductive film, and
(B) a second step of setting a threshold electric field strength, which is needed to start electron emission in a situation
where a higher electric potential is applied to the first conductive film than that applied to the second conductive film,
to a value greater than a threshold electric field strength, which is needed to start electron emission in a situation where
a higher electric potential is applied to the second conductive film than that applied to the first conductive film, by performing
electron emission by applying a voltage between the first conductive film and the second conductive film in a forward direction
such that an electric potential of the second conductive film is higher than an electric potential of the first conductive
film, and by performing electron emission by applying a voltage between the first conductive film and the second conductive
film in a reverse direction such that an electric potential of the first conductive film is higher than an electric potential
of the second conductive film, after the first step,
wherein a maximum value of an absolute value of the voltage in the reverse direction is greater than a maximum value of an
absolute value of the voltage in the forward direction and is greater than an absolute value of a voltage applied between
the first conductive film and the second conductive film when the electron emission device is driven.
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