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:
Feb. 03, 1981
Filed:
Dec. 29, 1977
Kurt B Kilichowski, Burlington, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
An amorphous, resistive thin film is deposited on internal surfaces of portions of a cathode ray tube by the pyrolysis of a liquid mixture of colloidal graphite and a heavy metal resinate to produce a film which is a mixture of graphite and the oxide of the metal. The metal resinate is a combination of tin and antimony resinate. The film is deposited on the tube neck in the region of the G3 and G4 electrodes to impede arcing. The amorphous film is also deposited on the tube funnel in the region extending from the snubber contact locations up to the anode voltage terminal. The pyrolysis of the heavy metal resinate and colloidal graphite results in a film having a resistance ranging from 10.sup.3 to 10.sup.8 ohms point to point. The amorphous film which does not require a binder, has good adhesion and scratch resistance characteristics, thereby reducing conductive particle contamination.