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. 21, 1989
Filed:
Jul. 24, 1987
Applicant:
Inventors:
Noriaki Nakamura, Nara, JP;
Kinichi Isaka, Koriyama, JP;
Masashi Kawaguchi, Nara, JP;
Hiroshi Kishishita, Nara, JP;
Hisashi Uede, Wakayama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; B32B / ;
U.S. Cl.
CPC ...
428690 ; 428917 ; 313503 ; 313506 ;
Abstract
A thin film EL element has a glass substrate, a pair of electrode layers formed on this glass substrate, and an electroluminescent layer sandwiched between these electrode layers. The glass substrate is of non-alkali type and has volume resistivity of 10.sup.6 ohm-cm or greater at 600.degree. C., alkali content of 0.5 wt % or less, and strain point of 600.degree. C. or higher.