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. 13, 2001
Filed:
Dec. 09, 1998
TDK Corporation, Tokyo, JP;
Abstract
An organic EL device has a hole injecting electrode (,), an electron injecting electrode (,), an organic layer (,) between the electrodes, and an inorganic insulating hole injecting layer (,) between the hole injecting electrode (,) and the organic layer (,). The inorganic insulating hole injecting layer (,) consists essentially of silicon oxide or germanium oxide or a mixture of silicon oxide and germanium oxide in an average composition represented by (Si,Ge,)O,wherein x and y are 0≦x≦1 and 1.7≦y≦1.99, as analyzed by Rutherford back-scattering. The device has the advantages of both organic and inorganic materials as well as a long lifetime, improved efficiency, low operating voltage, and low cost.