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:
Jan. 18, 1983
Filed:
Feb. 09, 1981
Yoshiyuki Odaka, Isumi, JP;
Kiyoshi Miura, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In forming a fluorescent screen of a black matrix type color picture tube, a light absorptive film is first formed on the inner surface of a face plate of the color picture tube. Formed on the light absorptive film is a light-hardenable photosensitive resin film which in turn is exposed to light through a shadow mask at portions corresponding to phosphor applying portions. The unexposed portion of the light-hardenable photosensitive film is then developed. Finally, the exposed portion of the light-hardenable photosensitive film and portion of the light absorptive film therebeneath are removed to partly perforate the light absorptive film so that in the light absorptive film, openings are formed into which the phosphor is applied.