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:
Apr. 17, 1990
Filed:
Mar. 25, 1988
Applicant:
Inventors:
Hideo Matsuda, Yokohama, JP;
Yasunori Usui, Yokohama, JP;
Shinjiro Kojima, Chigasaki, JP;
Masaru Ando, Kamakura, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 79 ; 357 71 ; 357 74 ; 357 81 ; 357 56 ;
Abstract
A soft metal plate having substantially equal hardness as emitter electrodes formed of soft metal is disposed between the emitter electrodes and a heat buffer metal plate formed of hard metal, and pressure applied to the emitter electrodes is shared by the soft metal plate, so as to reduce the thermal fatigue of the emitter electrodes.