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:
Jul. 24, 2007
Filed:
Apr. 18, 2006
Tetsuya Kato, Anjo, JP;
Kojiro Tachi, Nagoya, JP;
Masaaki Ozaki, Kariya, JP;
DENSO Corporation, Kariya, JP;
Abstract
An organic EL element is formed having a crystalline CuPc film as a positive hole injection layer and a positive hole transport layer, a luminescent layer, an electron transport layer and an electron injection layer, composed of amorphous organic materials, laminated between a pair of electrodes, wherein the change in the diffraction peak value of the CuPc film appearing with X-ray diffraction, which is produced by heating in the utilization temperature range of the organic EL element, is within ±25% of the diffraction peak value before heating. The organic EL element comprising a crystalline organic material is resistant to current shorts and leaks and exhibits satisfactory luminance properties in the utilization temperature range.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile