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. 17, 1992
Filed:
Feb. 05, 1991
Applicant:
Inventors:
Hiroaki Nakaya, Tenri, JP;
Takuo Yamashita, Tenri, JP;
Takashi Ogura, Nara, JP;
Kouji Tanaguchi, Nara, JP;
Koichi Tanaka, Nara, JP;
Akiyoshi Mikami, Yamatotakada, JP;
Katsushi Okibayashi, Sakurai, JP;
Kousuke Terada, Tenri, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 38 ; 156663 ; 20419222 ; 20419223 ; 427 66 ; 427255 ; 4272552 ; 4272557 ; 427331 ; 4274193 ; 4274197 ;
Abstract
Disclosed is an improvement of a process for producing a thin film electroluminescent device wherein the luminescent film is formed by a CVD method. The improvement residues in that an unnecessary portion of the luminescent layer, which is inherently formed if the CVD method is employed, is removed by etching.