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:
Mar. 06, 2001
Filed:
Dec. 09, 1998
Motohiro Suyama, Hamamatsu, JP;
Suenori Kimura, Hamamatsu, JP;
Norio Asakura, Hamamatsu, JP;
Ken Hirano, Hamamatsu, JP;
Yoshihiko Kawai, Hamamatsu, JP;
Yutaka Hasegawa, Hamamatsu, JP;
Tetsuya Morita, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu, JP;
Abstract
The present invention relates to an electron tube comprising, at least, a cathode electrode, a face plate having a photocathode, and an electron entrance surface provided at a position where the electron emitted from the photocathode reaches. The object of the present invention is to provide an electron tube which can reduce its size and has a structure for improving the workability in its assembling process. In particular, the electron tube according to the present invention has a bonding ring, provided between the face plate and the cathode electrode, for bonding the face plate and the cathode electrode together. The bonding ring is made of a metal material selected from the group consisting of In, Au, Pb, alloys containing In, and alloys containing Pb.