Active matrix OED array with improved OED cathode
US5998805A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Dec 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix OED array with an improved device cathode includes a plurality of control transistors formed on a semiconductor substrate with insulating material positioned over the control transistors to form a planar surface. A plurality of contact pads are formed on the planar surface and electrically coupled to the control transistors. A thin (5 .ANG. to 20 .ANG.) electron injecting layer of either alkaline metal oxide or alkaline metal fluoride is positioned on each contact pad and organic material is deposited on the electron injecting layer so as to define an organic light emitting device on each contact pad and electrical and light conducting material is positioned over the organic material to define a second terminal for the OEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.