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:
May. 11, 2010
Filed:
Jul. 03, 2007
Tomonori Akai, Tokyo-to, JP;
Shigehiro Ueno, Tokyo-to, JP;
Tomonori Akai, Tokyo-to, JP;
Shigehiro Ueno, Tokyo-to, JP;
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Abstract
An object of the present invention is to provide an EL element, which is with a problem of the EL layer deterioration caused at the time of forming a cathode layer on an EL layer resolved, and without the decline of the original functions; and a production method suitable for producing such an EL element. The object has been achieved by providing an EL element having a lamination structure with an anode layer, an EL layer, a charge transporting protection layer and a cathode layer formed in this order on a substrate, and by using a hole transporting material such as TPD for the charge transporting protection layer.