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. 02, 1987
Filed:
Feb. 27, 1985
Takeo Matsudaira, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
In an electroluminescent panel comprising a first or transparent electrode, a second or back electrode, and an intermediate layer between the first and the second electrodes, a dielectric layer is included in the intermediate layer and comprises a mixture of tantalum oxide and aluminum oxide. The dielectric layer results from a target of tantalum pentoxide and aluminum oxide by the use of sputtering. Preferably, the target comprises the tantalum oxide and aluminum oxide in a ratio selected between 50:50 and 95:5 by weight. The dielectric layer may be divided into first and second dielectric films which underlies and overlies the electroluminescent layer, respectively. The electroluminescent layer may also be divided into first and second electroluminescent films with a transparent dielectric film interposed therebetween.