The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2004
Filed:
Oct. 28, 2002
Takuya Komoda, Sanda, JP;
Tsutomu Ichihara, Hirakata, JP;
Koichi Aizawa, Neyagawa, JP;
Yoshiaki Honda, Kyoto, JP;
Yoshifumi Watabe, Tondabayashi, JP;
Takashi Hatai, Neyagawa, JP;
Yoshiyuki Takegawa, Nara, JP;
Toru Baba, Shijonawate, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
An electron source ( ) has an electron source element ( ) including a lower electrode ( ), a drift layer ( ) and a surface electrode ( ). The drift layer ( ) is interposed between the lower electrode ( ) and the surface electrode ( ). When a certain voltage is applied between the surface electrode ( ) and the lower electrode ( ) such that the surface electrode ( ) has a higher potential than that of the lower electrode ( ), a resultingly induced electric field allows electrons to pass through the drift layer ( ) and then the electrons are emitted through the surface electrode ( ). When a forward-bias voltage is applied between the surface electrode ( ) and the lower electrode ( ), a reverse-bias voltage is applied after the forward-bias voltage has been applied to release out of the drift layer ( ) an electron captured by a trap ( ) in the drift layer ( ).