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:
Feb. 03, 2004
Filed:
Oct. 19, 1999
Haruo Tanaka, Kyoto, JP;
Mitsuru Morimoto, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A cathode electrode, an organic EL layer, an anode electrode, and a color filter are formed in this order on a glass substrate. Light from the organic EL layer is emitted from the side of the anode electrode, through the color filter. The color filter is formed after forming the anode electrode, the organic EL layer, and the cathode electrode, so that it does not have to be made of a material that can withstand the conditions (e.g. temperature) for forming the anode electrode, the organic EL layer, and the cathode electrode. Since it is not necessary to provide the organic EL layer on top of the color filter with its large level differences, variations in the film thickness of the organic EL layer are eliminated, and light emission irregularities can be prevented.