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:
Jun. 15, 1993
Filed:
Mar. 13, 1992
Applicant:
Inventors:
Yoichi Tomo, Tokyo, JP;
Hidetoshi Watanabe, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445 24 ; 445 51 ; 313309 ; 313336 ;
Abstract
A method for producing a planar type electron radiating device including a plurality of cathodes having pointed ends on a major surface of a substrate, and a gate electrode having holes in the vicinity of the cathodes, is disclosed. After a hole is formed in the gate electrode and a silicon oxide film for laying a part of the major surface of the substrate to outside, a chromium thin film as a tight metal bonding film is deposited on the bottom of the hole prior to formation of the cathode, and the cathode is formed on the chromium thin film to prevent the cathode from being detached during the production process.