Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Patent
1995-07-28
2000-11-14
Patel, Vip
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
313310, M01J 105
Patent
active
061474495
ABSTRACT:
In an electron-emitting device including, between electrodes, an electroconductive film having an electron emitting region, the electroconductive film has a film formed in the electron emitting region and made primarily of a material having a higher melting point than that of a material of the electroconductive film. Alternatively, the electroconductive film has a film formed in the electron emitting region and made primarily of a material having a higher temperature at which the material develops a vapor pressure of 1.3.times.10.sup.-3 Pa, than that of a material of the electroconductive film. A manufacturing method for an electron-emitting device includes a step of forming a film made primarily of a metal in the electron emitting region of the electroconductive film. The electron-emitting device has stable characteristics and improved efficiency of electron emission. An image-forming apparatus comprising the electron-emitting devices has high luminance and excellent stability in operation.
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Hamamoto Yasuhiro
Iwasaki Tatsuya
Tsukamoto Takeo
Yamamoto Keisuke
Yamanobe Masato
Canon Kabushiki Kaisha
Patel Vip
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